High-vanadium high-niobium alloy composite roller and heat treatment equipment and heat treatment process thereof

Abstract

The invention relates to the field of rollers, and particularly discloses a high-vanadium and high-niobium alloy composite roller and heat treatment equipment and a heat treatment process thereof. An inner groove is formed in the middle of the roller body, and the roller core is located in the inner groove so that the roller body can completely wrap the roller core. The roller body is composed of the following materials: 1.0%-1.5% of carbon; 0.8% to 1.2% of silicon; 0.3%-1.0% of manganese; 7.5% to 10.0% of chromium; 1.0%-2.0% of molybdenum; 2.5%-5.0% of vanadium; 0.8%-2.0% of niobium; and the balance of iron. And the roller core is made of a high-toughness cast steel material. The roller core is completely wrapped by the roller body, so that the hardness of the roller body is improved only by heating the outer wall surface of the roller body during heat treatment of the roller, heat treatment is easier, and the effect of improving the quality of the roller is better facilitated.

Description

Technical Field

[0001] The present application relates to the field of rolling mills, and in particular to a high-vanadium and high-niobium alloy composite rolling mill, and heat treatment equipment and heat treatment process thereof. Background Art

[0002] Carbide rolls have been widely used in the production of bars, wires, rebars and seamless steel pipes due to their good wear resistance, high temperature red hardness, heat fatigue resistance and high strength, greatly improving the effective operating rate of rolling mills.

[0003] In actual production, the friction and impact between the roll and the billet will cause wear and deformation of the roll surface, making the roll have a higher hardness. The common solution is to add high chromium cast iron, tungsten steel, etc. to the roll to increase the hardness of the roll. This method can only increase the hardness. As we all know, the ideal cast steel material has high internal toughness and high external hardness, so as to ensure better performance. In the patent document with patent number CN202011372118.9, a combined rolling roller is proposed, which is composed of a transition layer with high toughness and a working layer with high hardness. However, the working layer is embedded in part of the transition layer, so that the transition layer and the working layer are exposed to the outside at the same time. As a result, when the rolling roller is heat treated, due to the inconsistency of the inner layer material and the outer layer material, the heat treatment temperature of the inner and outer layers cannot be met at the same time when the rolling roller is heat treated, resulting in production difficulties and poor quality. Summary of the invention

[0004] In order to improve the problem that when heat treating a rolling roller, the heat treatment temperature of both the inner layer and the outer layer cannot be met at the same time, resulting in production difficulties and poor quality, the present application provides a high-vanadium and high-niobium alloy composite rolling roller and its heat treatment equipment and heat treatment process.

[0005] The present application provides a high-vanadium and high-niobium alloy composite roll and its heat treatment equipment and heat treatment process using the following technical solutions: The first object of the present application is to provide a high-vanadium and high-niobium alloy composite rolling roller, the composite rolling roller comprising a roller body and a roller core; an inner groove is formed in the middle of the roller body, and the roller core is located in the inner groove so that the roller body completely wraps the roller core; the roller body is composed of the following materials: carbon 1.0%-1.5%; silicon 0.8%-1.2%; manganese 0.3%-1.0%; chromium 7.5%-10.0%; molybdenum 1.0%-2.0%; vanadium 2.5%-5.0%; niobium 0.8%-2.0%; the rest is iron; the roller core is a high-toughness cast steel material.

[0006] By adopting the above technical solution, the roller body completely wraps the roller core, and the roller core is made of a material with high toughness. The roller body increases its hardness due to the addition of materials such as chromium, vanadium, and niobium. Therefore, the main purpose of this application is that the outer layer with high hardness completely wraps the inner layer with high toughness, so that when performing heat treatment, only the roller body is exposed outside, and only the temperature for heat treatment of the roller body needs to be selected, so that the heat treatment effect is better and the product quality is higher.

[0007] The second object of the present application is to provide a heat treatment device for the above-mentioned high-vanadium and high-niobium alloy composite roller; the heat treatment device includes: a heat treatment furnace, used to form a heat treatment chamber for heating the composite roller, a control door for controlling the opening and closing of the heat treatment chamber, and a bearing structure for bearing a support frame; the bearing structure is arranged in the heat treatment chamber, and the support frame is used to place the composite roller to be heat treated; a flexible expansion member, connected to the heat treatment furnace, and the flexible expansion member is used to form an expansion control chamber; a driving member, used to inject a fluid medium into the expansion control chamber, so that the flexible expansion member expands to abut against the support frame or partially wraps the support frame or completely wraps the support frame, so that the flexible expansion member and the heat treatment chamber form a ventilation chamber that at least partially wraps the support frame; an atmosphere control member, used to inject argon into the ventilation chamber and discharge other gases in the ventilation chamber; wherein, after the flexible expansion member expands, the volume of the flexible expansion member in the heat treatment chamber becomes larger, so that the volume of the ventilation chamber is smaller than the volume of the heat treatment chamber.

[0008] By adopting the above technical solution, the composite roller to be heat treated is heat treated in an argon atmosphere, and the argon can be used to protect the composite roller to be heat treated, and better protect the composite roller to be heat treated. In addition, by using the flexible expansion member to expand in the heat treatment chamber, the volume of the heat treatment chamber can be reduced, thereby reducing the volume of the air in contact with the composite roller to be heat treated placed on the support frame, so that when the air in the heat treatment chamber is subsequently replaced with argon, it can be carried out in a relatively small ventilation chamber, so that the time required for argon ventilation can be greatly shortened, thereby saving the amount of argon used and reducing the amount of argon discharged into the air. After the ventilation of the ventilation chamber is completed, the flexible expansion member is contracted, and argon is slowly introduced into the heat treatment chamber, so that argon is first filled into a very small ventilation chamber to speed up the ventilation speed, and then the ventilation chamber is gradually enlarged until it becomes large enough to the heat treatment chamber, so that the argon introduced at this time does not need to be ventilated. It not only speeds up the filling speed of argon into the heat treatment chamber, but also greatly improves the purity of argon in the heat treatment chamber, better protects the heat-treated composite roller, and better improves the quality of the product.

[0009] Optionally, the support frame has multiple layers of accommodating space; each layer of the accommodating space forms a storage area for placing the composite rollers to be heat treated and an air area where the composite rollers to be heat treated are not placed; the elastic expansion member is used to form a sealing portion with a variable shape; after the elastic expansion member expands, the sealing portion forms an abutment surface in contact with the support frame, and forms an air area protrusion partially or completely embedded in the accommodating space on the abutment surface.

[0010] By adopting the above technical solution, the support frame has multiple layers of accommodation space in order to accommodate more composite rollers to be heat treated. The composite rollers to be heat treated are rods. There will be gaps after stacking, and the accommodation space cannot be completely filled, thus forming a storage area and an air area. The abutment surface formed by the expansion of the flexible expansion member contacts the support frame, thereby wrapping the support frame around the support frame, so that the ventilation chamber is a plurality of accommodation spaces in the support frame, which better reduces the volume of the ventilation chamber. In addition, the protrusion formed by the expansion of the flexible expansion member will also be embedded in the air area of ​​the accommodation space, so that the ventilation chamber is only a storage area or a storage area and a part of the air area. Then, the ventilation chamber can be used to provide a near-vacuum environment for the chamber to be heat treated. In addition to the composite rollers to be heat treated, there is almost no other gas in the ventilation chamber. When argon is injected, other gases in the ventilation chamber can be better replaced, which better ensures the speed of argon filling into the heat treatment chamber and better improves the purity of argon in the heat treatment chamber.

[0011] Optionally, an installation chamber is also formed in the heat treatment furnace; the installation chamber is connected to the heat treatment chamber through a connecting port; a baffle is provided at the connecting port; the driving member is also used to drive the baffle to move to a first position to open the connecting port and a second position to close the connecting port; the driving member is also used to make the flexible expansion member have an expanded state and a contracted state; when the baffle moves to the first position, the flexible expansion member is in the expanded state; when the baffle moves to the second position, the flexible expansion member is in the contracted state; when the flexible expansion member is in the expanded state, the volume of the flexible expansion member in the heat treatment chamber increases; when the flexible expansion member is in the contracted state, the flexible expansion member is completely contracted to the installation chamber.

[0012] By adopting the above technical solution, the installation chamber is used to accommodate the flexible expansion member, and when heat treatment is required, the heat treatment chamber will heat up, at which time the flexible expansion member is completely retracted into the installation chamber, and then the baffle separates the installation chamber from the heat treatment chamber, insulates the heat treatment chamber, and keeps the flexible expansion member away from the high temperature environment, which can protect the flexible expansion member. At the same time, the flexible expansion member is retracted to a position away from the heat treatment chamber, so that the baffle is used to seal the heat treatment chamber, which can better ensure the sealing of the heat treatment chamber.

[0013] Optionally, when the baffle is located at the first position, the baffle is used to form a first annular opening and a second annular opening in the connecting port; the outer circle of the first annular opening is located inside the inner circle of the second annular opening; the first annular opening is used for the flexible expansion member to expand outward, so that the flexible expansion member expands to form the abutment surface and the protrusion; the second annular opening is used for the flexible expansion member to expand outward, so that the flexible expansion member expands to the area between the support frame and the heat treatment chamber; when the baffle is located at the second position, the first annular opening and the second annular opening are closed.

[0014] By adopting the above-mentioned technical scheme, a part of the flexible expansion member will expand outward from the first annular opening, and another part of the flexible expansion member will expand outward from the second annular opening, thereby avoiding the flexible expansion member from expanding outward at one position for too long a length, avoiding the situation in which the flexible expansion member is easily damaged due to excessive expansion length, and also avoiding the situation in which the flexible expansion member is difficult to expand to form abutment surfaces and protrusions, thereby better ensuring the stability of the flexible expansion member during use.

[0015] Optionally, when the driving member drives the blocking member to move from the second position to the first position, the driving member also causes the flexible expansion member to expand until it is in close contact with a side of the blocking member facing away from the heat treatment chamber.

[0016] By adopting the above technical solution, when the driving member is ready to move the blocking member so that the connection port is about to be opened, the flexible expansion member is pressed against the side of the blocking member away from the heat treatment chamber, and when the blocking member is opened, the flexible expansion member will seal the connection port to prevent the air in the heat treatment chamber from entering the installation chamber and prevent the air in the installation chamber from entering the heat treatment chamber. The heat treatment chamber is better ensured to be in a closed state, so that the air in the heat treatment chamber can be better replaced with argon gas.

[0017] Optionally, the flexible expansion member includes at least a high-elasticity rubber membrane capable of forming the expansion control chamber; when the baffle is located at the second position, the driving member draws the fluid medium away from the expansion control chamber to put the flexible expansion member in a contracted state; when the flexible expansion member is in the contracted state, a vacuum insulation chamber is formed between the high-elasticity rubber mold and the baffle.

[0018] By adopting the above technical solution, when the high elastic rubber membrane shrinks, the high elastic rubber membrane will be located in the installation chamber, and the blocking member will close the connection port, thereby providing heat insulation to the high elastic rubber membrane, preventing the high elastic rubber from being affected in a high temperature environment, resulting in the problem of poor elasticity. In addition, a vacuum heat insulation chamber is formed between the blocking member and the high elastic rubber membrane, and the use of the vacuum chamber for heat insulation can better block the transfer of heat, so that the high elastic rubber membrane does not contact the blocking member, and the vacuum between the two better prevents the high elastic rubber membrane from being stored at high temperatures, thereby better protecting the high elastic rubber membrane.

[0019] Optionally, two groups of the flexible expansion members and the driving members are provided; a door body inner cavity is provided in the control door, one group of the flexible expansion members is provided in the door body inner cavity, and the other group of the flexible expansion members is provided in the installation chamber; two baffles are provided, one of which is located between the door body inner cavity and the heat treatment chamber, and the other baffle is located between the installation chamber and the heat treatment chamber; when the baffle is located at the first position, the two groups of the flexible expansion members are connected to form the ventilation chamber that can fully wrap the support frame.

[0020] By adopting the above-mentioned technical scheme, through the arrangement of two groups of flexible expansion members and two groups of driving members, when the flexible expansion members are expanded, the flexible expansion members can be made to expand toward the support frame in two directions at the same time, so that the degree of expansion required for the two flexible expansion members is lower than the degree of expansion required for one flexible expansion member, thereby making it easier for the flexible expansion members to form a ventilation chamber that wraps the support frame, and better ensuring the sealing of the ventilation chamber, so that when argon is subsequently filled, the injection of argon can be completed more quickly and the purity of the argon can be ensured.

[0021] Optionally, an auxiliary expansion body is formed on the flexible expansion piece; the auxiliary expansion body forms an auxiliary chamber capable of expansion and contraction; the flexible expansion piece and the auxiliary expansion body are connected by an elastic tightening structure; the elastic tightening structure is used to form a connecting chamber; the tightening structure is used to configure the connecting chamber to connect the auxiliary chamber with the expansion control chamber when the pressure in the expansion control chamber is greater than a preset pressure.

[0022] Since the expansion degree of the flexible expansion member is limited, when the flexible expansion member forms a protrusion, the protrusion can only be partially embedded in the air area, and after the flexible expansion member is partially embedded in the air area, the expansion degree of the flexible expansion member reaches the limit, so it is difficult for the flexible expansion member to completely fill the air area; By adopting the above-mentioned technical scheme, when the flexible expansion member cannot expand and the pressure in the flexible expansion member has reached the preset pressure, the auxiliary expansion body can be expanded, and the auxiliary expansion body can continue to expand and reach a position that the flexible expansion member cannot reach, so that the air chamber can be filled more with the flexible expansion member or the auxiliary expansion body, so that only the storage area and a very small air area exist in the ventilation chamber, so that the speed of ventilating the air into argon is faster. In some cases, the ventilation chamber can be kept in a vacuum state as much as possible, and only the support frame and the composite rolling roller to be heat treated exist in the ventilation chamber, which is more conducive to increasing the speed of argon injection and improving the purity of argon in the heat treatment chamber.

[0023] The second object of the present application is to provide a heat treatment process for the above-mentioned high-vanadium and high-niobium alloy composite rolling roller; the heat treatment process comprises: placing a support frame for holding the composite rolling roller to be heat treated into a heat treatment furnace having a heat treatment chamber; injecting gas into a flexible expansion member having an expansion control chamber through a driving member, so that the flexible expansion member can expand to abut against the support frame or partially wrap the support frame or completely wrap the support frame; and making the flexible expansion member and the heat treatment chamber form a ventilation chamber that at least partially wraps the support frame; injecting argon gas into the ventilation chamber and discharging other gases in the ventilation chamber through an atmosphere control member; after the flexible expansion member expands, the volume of the flexible expansion member in the heat treatment chamber becomes larger, so that the volume of the ventilation chamber is smaller than the volume of the heat treatment chamber.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The roller core is completely wrapped by the roller body, so that during heat treatment of the roller of the present application, only the outer wall surface of the roller body needs to be heated to increase the hardness of the roller body, thereby making it easier to perform heat treatment, which is more conducive to improving the quality of the present application; 2. Use flexible expansion parts to fill the heat treatment chamber, and make most or all of the space in the heat treatment chamber filled with the flexible expansion parts, and then inject argon into the heat treatment chamber. Then, it can be achieved that argon is injected under a vacuum condition, so as to better ensure the injection speed of argon and the purity of argon in the heat treatment chamber, improve the protection of the composite roller to be heat treated, and thus improve the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an overall schematic diagram according to one embodiment of the present application; Figure 2 It is a structural diagram of a part of the embodiment, mainly showing Figure 1 The internal structure after the control door is removed; Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the connecting frame and the stopper; Figure 4 It is a structural diagram of a part of the embodiment, mainly showing Figure 1 The cross-sectional structure of Figure 5 It is a structure inside the installation chamber of another embodiment, mainly a schematic plan view of a cross-section; Figure 6 yes Figure 5 A magnified view of part A; Figure 7 It is a schematic structural diagram of a part of another embodiment, mainly showing the structure when a connecting groove is formed in the push rod, and is mainly a schematic cross-sectional plan view; Figure 8 yes Figure 7 Magnified view of part F; Fig. 9 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the pneumatic element and some surrounding parts; Fig.10 yes Fig. 9 A magnified view of part B; Fig.11 It is a structural schematic diagram of a part of the embodiment, mainly showing the Fig. 9 Structure, the high elastic rubber membrane was removed; Fig.12 yes Fig.11 Enlarged view of part C; Fig.13 It is a structural schematic diagram of a part of the embodiment, mainly showing the overall structure of the embodiment of forming a door body cavity in the control door; Fig.14 It is a structural schematic diagram of a part of the embodiment, mainly showing the Fig.13 structure; Fig.15 It is a structural diagram of a part of the embodiment, mainly showing Fig.13 The cross-sectional structure of Fig.16 yes Fig.15 A magnified view of the D portion; Fig.17 It is a schematic structural diagram of a part of the embodiment, mainly showing the structure when the high elastic rubber membrane expands to form a sealing portion; Fig.18 It is a structural diagram of a part of the embodiment, mainly showing Fig.17 Schematic diagram of the plane; Fig.19 It is a structural schematic diagram of a part of the embodiment, mainly showing the schematic structure of the positions of some parts when the first annular opening and the second annular opening are formed; Fig. 20 It is a structural diagram of a part of the embodiment, mainly showing Fig.13 Schematic structure of a vacuum insulation chamber formed by a high elastic rubber membrane; Fig.21 yes Fig. 20 Enlarged view of part E.

[0026] Reference numerals: 1. Heat treatment furnace; 11. Heat treatment chamber; 111. Ventilation chamber; 12. Control door; 121. Door body cavity; 13. Bearing structure; 14. Support frame; 141. Accommodation space; 142. Support plate; 143. Storage area; 144. Air area; 15. Sealing part; 151. Abutment surface; 152. Protrusion; 16. Installation chamber; 17. Connection port; 18. Vacuum insulation chamber; 2. Flexible expansion member; 21. Expansion control chamber; 22. High elastic rubber membrane; 3. Driving member; 31. Pump body; 32. Pushing structure; 33. Electric component; 34. Pushing rod; 341. Inserting part; 342. Connecting groove; 35. Abutting frame; 36. Spring; 37. Pushing plate; 371. Snap ring; 38. Pneumatic element; 4. Atmosphere control components; 5. Blocker; 51. First annular opening; 52. Second annular opening; 53. First baffle structure 53 structure; 531. First sealing surface; 54. Second baffle structure; 541. Mounting opening; 542. Embedded groove; 543. Second sealing surface; 544. First concave groove; 545. Second concave groove; 55. Heat insulation component; 6. Connecting frame; 7. Limiting parts. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-21 This application is described in further detail.

[0028] Example 1

[0029] Provided is a high-vanadium and high-niobium alloy composite roll, the composite roll comprising a roll body and a roll core; an inner groove is formed in the middle of the roll body, the roll core is located in the inner groove, so that the roll body completely wraps the roll core; the roll body is composed of the following materials: carbon 1.0%-1.5%; silicon 0.8%-1.2%; manganese 0.3%-1.0%; chromium 7.5%-10.0%; molybdenum 1.0%-2.0%; vanadium 2.5%-5.0%; niobium 0.8%-2.0%; the rest is iron; the roll core is a high-toughness cast steel material. Preferably, the roll core is low-carbon steel or medium-speed steel.

[0030] By adopting the above technical solution, the roller body completely wraps the roller core, and the roller core is made of a material with high toughness. The roller body increases its hardness due to the addition of materials such as chromium, vanadium, and niobium. Therefore, the main purpose of this application is that the outer layer with high hardness completely wraps the inner layer with high toughness, so that when performing heat treatment, only the roller body is exposed outside, and only the temperature for heat treatment of the roller body needs to be selected, so that the heat treatment effect is better and the product quality is higher.

[0031] Example 2

[0032] Main reference Figure 1-2 4. A heat treatment device for the above-mentioned high-vanadium and high-niobium alloy composite roller, comprising: a heat treatment furnace 1, a flexible expansion member 2, a driving member 3 and an atmosphere control member 4. The heat treatment furnace 1 is used to form a heat treatment chamber 11 for heating the composite roller, a control door 12 for controlling the opening and closing of the heat treatment chamber 11, and a bearing structure 13 for bearing a support frame 14. Among them, the control door 12 is hinged to the heat treatment furnace 1, and the control door 12 blocks the heat treatment chamber 11. In this embodiment, the heat treatment chamber 11 adopts a circular chamber, and the bearing structure 13 is arranged in the heat treatment chamber 11. The bearing structure 13 is a block, and the bearing structure 13 is used to place the support frame 14 to avoid the unstable placement of the support frame 14 when it is directly placed in the circular heat treatment chamber 11. The support frame 14 is used to place the composite roller to be heat treated. The heat treatment furnace 1 of the present application is mainly for heating, and can be used at least in the heat treatment process of annealing and tempering.

[0033] The flexible expansion member 2 is connected to the heat treatment furnace 1, and the flexible expansion member 2 is used to form an expansion control chamber 21. The flexible expansion member 2 is a flexible body, which refers to a structure that can be deformed, and the expansion control chamber 21 is a cavity in the flexible expansion member 2. For reference, the flexible expansion member 2 can be regarded as a balloon, and the expansion control chamber 21 is the chamber where the gas is located after the balloon is inflated. For reference, the flexible expansion member 2 can also be regarded as a closed food packaging bag, and the expansion control chamber 21 is the chamber in the food packaging bag. The driving member 3 is used to inject a fluid medium into the expansion control chamber 21, so that the flexible expansion member 2 expands to abut against the support frame 14 or partially wrap the support frame 14 or completely wrap the support frame 14, so that the flexible expansion member 2 and the heat treatment chamber 11 form a ventilation chamber 111 that at least partially wraps the support frame 14. Among them, when the flexible expansion member 2 is a balloon or a food packaging bag, the flexible expansion member 2 is in a contracted state between expansions. The fluid medium in this embodiment is gas or water, preferably air, and more preferably argon. The driving member 3 in this embodiment is a pump body 31, and the pump body 31 is externally connected to a storage box, and the storage box is used to store the fluid medium. The pump body 31 injects the fluid medium in the storage box into the expansion control chamber 21. In other schemes, when the fluid medium is air, the pump body 31 is directly connected to the external environment to realize the injection of air into the expansion control chamber 21.

[0034] The atmosphere control component 4 is used to inject argon into the ventilation chamber 111 and to discharge other gases in the ventilation chamber 111. The atmosphere control component 4 is arranged on the side of the heat treatment furnace 1, and two atmosphere control components 4 are arranged, one of which is used to inject argon into the heat treatment chamber 11, and the other is used to discharge the air in the heat treatment chamber 11 to the outside. In detail, the atmosphere control component 4 includes a pump body 31, a delivery pipeline and an argon storage tank. The pump body 31 injects the gas in the argon storage tank into the heat treatment chamber 11 through the delivery pipeline, or the pump body 31 discharges the air in the heat treatment chamber 11 to the outside through the delivery pipeline. Preferably, the delivery pipeline is used to connect the pump body 31 with the heat treatment chamber 11, and more preferably, the delivery pipeline partially extends to the position of the support frame 14, and after the flexible expansion member 2 is expanded, the delivery pipeline is connected with the ventilation chamber 111. After the flexible expansion member 2 expands, the volume of the flexible expansion member 2 in the heat treatment chamber 11 increases, so that the volume of the ventilation chamber 111 is smaller than the volume of the heat treatment chamber 11 .

[0035] In this embodiment, the flexible expansion member 2 is directly disposed in the heat treatment chamber 11. The flexible expansion member 2 is made of high temperature resistant material. When the heat treatment chamber 11 is heated to a high temperature state, the performance of the flexible expansion member 2 itself will not be affected.

[0036] By adopting the above-mentioned technical solution, the composite roller to be heat treated is heat treated in an argon atmosphere, and the argon can be used to protect the composite roller to be heat treated, and better protect the composite roller to be heat treated. In addition, by using the flexible expansion member 2 to expand in the heat treatment chamber 11, the volume of the heat treatment chamber 11 can be reduced, thereby reducing the amount of air in contact with the composite roller to be heat treated placed on the support frame 14. Then, when the air in the heat treatment chamber 11 is subsequently replaced with argon, it can be carried out in a relatively small ventilation chamber 111, so that the time required for argon ventilation can be greatly shortened, thereby saving the use of argon and reducing the amount of argon discharged into the air. After the ventilation chamber 111 is ventilated, the flexible expansion member 2 is contracted, and argon is slowly introduced into the heat treatment chamber 11, so that the argon is first filled into a very small ventilation chamber 111 to speed up the ventilation, and then the ventilation chamber 111 is gradually enlarged until it becomes large enough to the heat treatment chamber 11, so that the argon introduced at this time does not need to be ventilated. Not only the speed of argon filling into the heat treatment chamber 11 is accelerated, but also the purity of argon in the heat treatment chamber 11 is greatly improved, so that the heat treatment composite roller is better protected and the quality of the product is better improved.

[0037] Specifically, the support frame 14 has multiple layers of accommodation spaces 141, wherein a support plate 142 is formed on the support frame 14, and multiple support plates 142 are provided. The area between any two support plates 142 is the accommodation space 141, so that multiple support plates 142 form multiple accommodation spaces 141. After the composite roll to be heat treated is placed on the support plate 142, each layer of the accommodation space 141 forms a storage area 143 where the composite roll to be heat treated is placed and an air area 144 where the composite roll to be heat treated is not placed. The storage area 143 is the space occupied by the space to be heat treated, and the air area 144 is the space not occupied by the composite roll to be heat treated. The support frame 14 has multiple layers of accommodation spaces 141 in order to accommodate more composite rolls to be heat treated. The composite roll to be heat treated is a bar material, and there will be gaps after stacking, and the accommodation space 141 cannot be completely filled, thereby forming the storage area 143 and the air area 144. However, when there are only one or two composite rollers to be heat treated in each accommodating space 141, there is no need to stack the composite rollers to be heat treated, so that no gaps will be generated. However, there will be a gap between the composite rollers to be heat treated and the support plate 142, so that the accommodating space 141 cannot be filled, and a storage area 143 and an air area 144 will be generated anyway.

[0038] The elastic expansion member is used to form a seal portion 15 with a variable shape, and the seal portion 15 is an end of the elastic expansion member facing the support frame 14. After the elastic expansion member is expanded, the seal portion 15 forms an abutment surface 151 in contact with the support frame 14. The abutment surface 151 formed after the flexible expansion member 2 is expanded contacts the support frame 14, thereby wrapping the support frame 14 around the support frame 14, so that the ventilation chamber 111 is a plurality of accommodating spaces 141 in the support frame 14, and the volume of the ventilation chamber 111 is better reduced.

[0039] A protrusion 152 is formed on the abutting surface 151 and is partially or completely embedded in the air area 144 in the accommodating space 141. The abutting surface 151 is a surface that matches the shape of the support frame 14 after the outer wall surface of the flexible expansion member 2 abuts against the support frame 14, and the protrusion 152 is a portion that is raised relative to the abutting surface 151 formed after the flexible expansion member 2 expands. The protrusion 152 formed after the flexible expansion piece 2 expands will also be embedded in the air area 144 of the accommodating space 141, so that the ventilation chamber 111 is only the storage area 143 or the storage area 143 and part of the air area 144. Then, the ventilation chamber 111 can be used to provide a near-vacuum environment for the heat treatment chamber 11. In addition to the composite rolling mill roll to be heat treated, there is almost no other gas in the ventilation chamber 111. When argon is injected, other gases in the ventilation chamber 111 can be better replaced, thereby better ensuring the speed of argon filling into the heat treatment chamber 11 and better improving the purity of argon in the heat treatment chamber 11.

[0040] Example 3

[0041] Refer to the attached Figure 3 , 5-12, the difference from Example 2 is that: the heat treatment furnace 1 also forms an installation chamber 16. The installation chamber 16 is connected to the heat treatment chamber 11 through a connection port 17. The connection port 17 is provided with a baffle 5, and the baffle 5 adopts a plate in this embodiment. The driving member 3 is also used to drive the baffle 5 to move to a first position to open the connection port 17 and a second position to close the connection port 17, and the driving member 3 is also used to make the flexible expansion member 2 have an expansion state and a contraction state. The method in which the flexible expansion member 2 is in the contraction state is that the driving member 3 draws out the fluid medium in the flexible expansion member 2. When the baffle 5 moves to the first position, the flexible expansion member 2 is in the expansion state. When the baffle 5 moves to the second position, the flexible expansion member 2 is in the contraction state. When the flexible expansion member 2 is in the expansion state, the volume of the flexible expansion member 2 in the heat treatment chamber 11 increases. When the flexible expansion member 2 is in the contraction state, the flexible expansion member 2 is completely contracted to the installation chamber 16. In this embodiment, the driving member 3 includes a pushing structure 32 and an air pump. The pushing structure 32 adopts one of an electric push rod, a hydraulic cylinder and an air cylinder. The pushing structure 32 is used to drive the blocking member 5 to move to the first position and the second position. The air pump is used to inject a fluid medium into the expansion control chamber 21 or extract a fluid medium.

[0042] The installation chamber 16 is used to accommodate the flexible expansion member 2, and when heat treatment is required, the heat treatment chamber 11 will heat up. At this time, the flexible expansion member 2 will be completely retracted into the installation chamber 16, and then the baffle 5 will separate the installation chamber 16 from the heat treatment chamber 11, thereby keeping the heat treatment chamber 11 warm and keeping the flexible expansion member 2 away from the high temperature environment, thereby protecting the flexible expansion member 2.

[0043] Example 4

[0044] See attached Figure 3 , 5 -12, which is different from Example 3 in that: when the blocking member 5 is located at the first position, the blocking member 5 is used to form a first annular opening 51 and a second annular opening 52 in the connecting port 17. The outer circle of the first annular opening 51 is located inside the inner circle of the second annular opening 52. The first annular opening 51 is used for the flexible expansion member 2 to expand outward, so that the flexible expansion member 2 expands to form the abutment surface 151 and the protrusion 152. The second annular opening 52 is used for the flexible expansion member 2 to expand outward, so that the flexible expansion member 2 expands to the area between the support frame 14 and the heat treatment chamber 11; when the blocking member 5 is located at the second position, the first annular opening 51 and the second annular opening 52 are closed.

[0045] Among them, the flexible expansion member 2 that expands outward from the second annular opening 52 will expand to contact the support frame 14, and then expand in the direction away from the axis of the second annular opening 52, and expand to abut against the inner wall surface of the heat treatment chamber 11, and then continue to extend along the air area 144 between the inner wall surface of the heat treatment chamber 11 and the support frame 14, until the flexible expansion member 2 extends from one end of the support frame 14 to the other end of the support frame 14 and contacts the control door 12, and then extends in the direction of the axis of the second annular opening 52 until it is closed, completely wrapping the support frame 14, and forming a ventilation chamber 111, wherein, for the specific shape and position of the flexible expansion member 2 that expands outward from the second annular opening 52 after expansion, refer to the accompanying drawings Fig.18 .

[0046] In addition, the flexible expansion member 2 that expands outward from the first annular opening 51 will expand until it abuts against the support frame 14, and then expand away from the axis of the first annular opening 51 until it abuts against the flexible expansion member 2 that expands out from the second annular opening 52; at the same time, it will also expand close to the axis of the first annular opening 51 to the axis position of the first annular opening 51. Then the flexible expansion member 2 will also expand between the baffle 5 and the support frame 14, thereby forming a protrusion 152 that is inserted into the air area 144 in the support frame 14, so that most of the space in the heat treatment chamber 11 is filled with the flexible expansion member 2. Among them, for the specific shape and position of the flexible expansion member 2 that expands outward from the first annular opening 51 after expansion, please refer to the attached drawings Fig.18 Then, a small-volume ventilation chamber 111 is formed in the support frame 14 wrapped by the flexible expansion member 2 , which is beneficial to increasing the speed at which argon gas replaces other air in the heat treatment chamber 11 .

[0047] Part of the flexible expansion piece 2 will expand outward from the first annular opening 51, and another part of the flexible expansion piece 2 will expand outward from the second annular opening 52, thereby avoiding the flexible expansion piece 2 from expanding outward at one position for a too long length, avoiding the flexible expansion piece 2 from being easily damaged due to excessive expansion length, and also avoiding the flexible expansion piece 2 from having difficulty in expanding to form the abutment surface 151 and the protrusion 152, thereby better ensuring the stability of the flexible expansion piece 2 during use.

[0048] Specifically, when the driving member 3 drives the blocking member 5 to move from the second position to the first position, the driving member 3 also expands the flexible expansion member 2 to abut against the side of the blocking member 5 away from the heat treatment chamber 11. When the driving member 3 is ready to move the blocking member 5 so that the connecting port 17 is about to be opened, the flexible expansion member 2 abuts against the side of the blocking member 5 away from the heat treatment chamber 11, and then when the blocking member 5 is opened, the flexible expansion member 2 directly expands outward from the positions of the first annular opening 51 and the second annular opening 52, or expands outward from the area between the blocking member 5 and the connecting port 17, thereby keeping the connecting port 17 closed. Prevent the air in the heat treatment chamber 11 from entering the installation chamber 16 and prevent the air in the installation chamber 16 from entering the heat treatment chamber 11. Thereby, the air in the heat treatment chamber 11 can be better replaced with argon gas. At the same time, it can also ensure that the installation chamber 16 is always in a sealed state. In some cases, the gas in the installation chamber 16 that is in contact with the flexible expansion member 2 can be kept in an unchanged state at all times. For example, in some cases, the flexible expansion member 2 is in contact with the corrosive gas in the air, which can easily cause damage to the flexible expansion member 2. Therefore, the installation chamber 16 can be filled with a gas that will not damage the flexible expansion member 2, such as nitrogen being filled into the installation chamber 16. The installation chamber 16 is used to accommodate the nitrogen in contact with the flexible expansion member 2, so that no matter how the flexible expansion member 2 expands, the flexible expansion member 2 or the baffle 5 will close the connecting port 17 to separate the installation chamber 16 and the heat treatment chamber 11 from each other, so that no other gas will enter the installation chamber 16, thereby strengthening the protection of the flexible expansion member 2.

[0049] Specifically, in some other solutions, the flexible expansion member 2 at least includes a high elastic rubber film 22 capable of forming the expansion control chamber 21. The high elastic rubber film 22 is sealed relative to the inner wall surface of the installation chamber 16, so that the high elastic rubber film 22 forms the expansion control chamber 21 in a manner that the high elastic rubber film 22 and the inner wall surface of the installation chamber 16 are jointly formed. When the stopper 5 is located at the second position, the driving member 3 draws the fluid medium away from the expansion control chamber 21, so that the flexible expansion member 2 is in a contracted state; when the flexible expansion member 2 is in the contracted state, a vacuum heat insulation chamber 18 is formed between the high elastic rubber mold and the stopper 5. In order to form a vacuum chamber between the high elastic rubber membrane 22 and the stopper 5, the position where the high elastic rubber membrane 22 contacts the inner wall surface of the installation chamber 16 is far away from the stopper 5, and then the installation chamber 16 on the side of the high elastic rubber membrane 22 away from the stopper 5 is placed in a negative pressure, so that the high elastic rubber membrane 22 is away from the stopper 5, and the high elastic rubber membrane 22 forms the stopper 5. In this embodiment, the preferred high elastic rubber membrane 22 is fixedly connected to the inner wall surface of the installation chamber 16. Among them, a vacuum insulation chamber 18 is formed between the stopper 5 and the high elastic rubber membrane 22, and the vacuum chamber is used for insulation, which can better block the transfer of heat, so that the high elastic rubber membrane 22 does not contact the stopper 5, and the vacuum between the two can better avoid the high elastic rubber membrane 22 from being stored at high temperature, thereby better protecting the high elastic rubber membrane 22.

[0050] Example 5

[0051] The difference from Example 4 is: The method for the high elastic rubber membrane 22 to form the expansion control chamber 21 is that the edges of the high elastic rubber membrane 22 are connected to each other, so that the high elastic rubber membrane 22 wraps itself to form a closed chamber, which is the expansion control chamber 21.

[0052] Example 6

[0053] The difference from Example 5 is: See attached Figure 13-15, the flexible expansion member 2 and the driving member 3 are both provided with two groups. The control door 12 is provided with a door body cavity 121, one group of the flexible expansion members 2 is provided in the door body cavity 121, and the other group of the flexible expansion members 2 is provided in the installation chamber 16; two blocking members 5 are provided, one of which is located between the door body cavity 121 and the heat treatment chamber 11, and the other is located between the installation chamber 16 and the heat treatment chamber 11; when the blocking member 5 is located at the first position, the two groups of the flexible expansion members 2 are connected to form the ventilation chamber 111 that can fully wrap the support frame 14. By setting up two groups of flexible expansion members 2 and two groups of driving members 3, when the flexible expansion members 2 are expanded, the flexible expansion members 2 can be made to expand toward the support frame 14 in two directions at the same time, so that the degree of expansion required for the two flexible expansion members 2 is lower than the degree of expansion required for one flexible expansion member 2, so that it is easier for the flexible expansion members 2 to form a ventilation chamber 111 that wraps the support frame 14, and the sealing of the ventilation chamber 111 is better guaranteed, so that when argon is subsequently filled, the injection of argon can be completed more quickly and the purity of the argon can be guaranteed.

[0054] Example 7

[0055] The difference from Example 6 is: See attached Figure 13-21 The blocking member 5 includes a first baffle structure 53 and a second baffle structure 54; a mounting opening 541 is formed in the middle of the second baffle structure 54. The first baffle structure 53 is used to be embedded in the mounting opening 541 when the blocking member 5 is located at the second position, and to form the first annular opening 51 in the mounting opening 541 when the baffle is located at the first position; the second baffle structure 54 is used to be embedded in the connecting opening 17 when the blocking member 5 is located at the second position, and to form the second annular opening 52 in the connecting opening 17 when the baffle is located at the first position. In this embodiment, two pushing structures 32 are provided, one of which is used to push the first baffle structure 53 to move, and the other is used to push the second baffle structure 54 to move. By utilizing the mutual movement between the first baffle structure 53 and the second baffle structure 54, the first annular opening 51 is formed between the first baffle structure 53 and the installation opening 541, and the second annular opening 52 is formed between the second baffle structure 54 and the connection opening 17, so that the first annular opening 51 and the second annular opening 52 are more easily formed, and the first annular opening 51 and the second annular opening 52 are more easily closed. The pushing structure 32 adopts an electric push rod.

[0056] The inner wall surface of the installation port 541 forms a first sealing surface 531, and the outer wall surface of the first baffle structure 53 forms a second sealing surface 543. The first sealing surface 531 and the second sealing surface 543 are both inclined surfaces, so that when the first baffle structure 53 is embedded in the installation port 541, the first sealing surface 531 and the second sealing surface 543 abut against each other. The setting of the inclined surface increases the contact area between the first sealing surface 531 and the second sealing surface 543, thereby improving the sealing performance. Similarly, the inner wall surface of the connection port 17 forms a third sealing surface, and the outer wall surface of the second baffle structure 54 forms a fourth sealing surface. The third sealing surface and the fourth sealing surface are both inclined surfaces, so that the third sealing surface and the fourth sealing surface also increase the sealing performance of the second baffle structure 54 and the connection port 17.

[0057] More specifically, in this embodiment, since the pushing structure 32 needs to drive the first baffle structure 53 and the second baffle structure 54 to move, the pushing structure 32 needs to contact the first baffle structure 53 and the second baffle structure 54, and there is a high elastic rubber membrane 22 between the two, and the high elastic rubber membrane 22 is fixed to the first baffle structure 53 and the second baffle structure 54, so that the high elastic rubber membrane 22 can expand outward normally. In order to insulate the high elastic rubber membrane 22 from the first baffle structure 53 and the second baffle structure 54, a heat insulation component 55 is provided on the first baffle structure 53 and the second baffle structure 54, the pushing structure 32 is connected to the high elastic rubber membrane 22, the high elastic rubber membrane 22 is connected to the heat insulation component 55, and the heat insulation component 55 is fixed to the first baffle structure 53 and the second baffle structure 54, so that although the high elastic rubber membrane 22 is in contact with the first baffle structure 53 and the second baffle structure 54, the heat insulation component 55 can play a role in heat insulation between the first baffle structure 53 and the second baffle structure 54 and the high elastic rubber membrane 22.

[0058] More specifically, in this embodiment, the first baffle structure 53 and the second baffle structure 54 are both formed with an embedding groove 542, and the embedding groove 542 is used to install the heat insulation component 55. The heat insulation component 55 is an aerogel block or a block structure formed by aerogel particles.

[0059] Example 8

[0060] The difference from Example 7 is that: Refer to the attached Figure 13-21The high elastic rubber membrane 22 can slide relative to the inner wall surface of the installation chamber 16. When the high elastic rubber membrane 22 expands outward from the first annular opening 51 and the second annular opening 52, the high elastic rubber membrane 22 moves toward the direction close to the stopper 5, so that the high elastic rubber membrane 22 can expand outward more, increasing the degree of outward expansion of the high elastic rubber membrane 22. When the heat treatment chamber 11 is heated, the high elastic rubber membrane 22 moves in the direction away from the stopper 5, so that a vacuum insulation chamber 18 can be formed between the high elastic rubber membrane 22 and the stopper 5. The vacuum insulation chamber 18 refers to the attached figure. Fig.21 .

[0061] The pushing structure 32 in this embodiment includes a connecting frame 6, which is used to install the high-elastic rubber membrane 22, and the connecting frame 6 is located at one end of the high-elastic rubber membrane 22 away from the baffle 5. Three pushing structures 32 are provided, and the three pushing structures 32 are all electric push rods. The first pushing structure 32 is used to push the first baffle structure 53 to move, the second pushing structure 32 pushes the second baffle structure 54 to move, and the third pushing structure 32 pushes the connecting frame 6 to move. When the high-elastic rubber membrane 22 expands outward, the first baffle structure 53 and the second baffle structure 54 move, so that the first annular opening 51 and the second annular opening 52 are formed on the first baffle structure 53 and the second baffle structure 54, and then the support frame 14 moves, and the connecting frame 6 moves close to the first baffle structure 53 and the second baffle structure 54, so that the high-elastic rubber membrane 22 moves toward the first baffle structure 53 and the second baffle structure 54, so that the high-elastic rubber membrane 22 is closer to the heat treatment chamber 11, and when the high-elastic rubber membrane 22 expands outward from the first annular opening 51 and the second annular opening 52, it can expand outward better.

[0062] In addition, the outward expansion of the high-elastic rubber membrane 22 from the first annular opening 51 is mainly the outward expansion of the high-elastic rubber membrane 22 between the first baffle structure 53 and the second baffle structure 54, and the outward expansion of the high-elastic rubber membrane 22 at the second annular opening 52 is mainly the outward expansion of the high-elastic rubber membrane 22 between the second baffle structure 54 and the inner wall of the installation chamber 16. Since the rubber membrane that expands outward from the first annular opening 51 is only used to fill the air area 144 in the support frame 14, and the volume of the air area 144 in the support frame 14 is relatively small, the high-elastic rubber membrane 22 between the first baffle structure 53 and the second baffle structure 54 can be directly utilized to expand outward, but the high-elastic rubber membrane 22 that expands outward from the second annular opening 52 is mainly used to wrap the support frame 14, so that the volume of the high-elastic rubber membrane 22 required to wrap the support frame 14 will be larger, and the degree of expansion of the high-elastic rubber membrane 22 needs to be higher. Therefore, the movement of the connecting frame 6 close to the first baffle structure 53 and the second baffle structure 54 can use more high-elastic rubber membrane 22 that expands out from the second annular opening 52, so that it can expand larger and better wrap the support member.

[0063] Specifically, the second baffle structure 54 is formed with a first recessed groove 544 and a second recessed groove 545. The first recessed groove 544 is used to connect with the first baffle structure 53, and the second recessed groove 545 is used to connect with the installation chamber 16. Thus, the first recessed groove 544 will allow more high elastic rubber membranes 22 to exist between the first baffle structure 53 and the second baffle structure 54. Although the high elastic rubber membrane 22 can also be stacked between the first baffle structure 53 and the second baffle structure 54, this will result in the high elastic rubber membrane 22 being difficult to expand when the first baffle structure 53 and the second baffle structure 54 are opened, which may easily lead to the first annular opening 51 and the second annular opening 52 being unable to be sealed. For this reason, in order to allow the high elastic rubber membrane 22 to expand more outwards, the first annular opening 51 and the second annular opening 52 are ensured to be blocked when the first baffle structure 53 and the second baffle structure 54 are opened. Therefore, in this embodiment, the purpose of the first concave groove 544 and the second concave groove 545 is to increase the size of the high elastic rubber membrane 22 so that the high elastic rubber membrane 22 can expand outward more.

[0064] In some other schemes, the pushing structure 32 includes an electric component 33, a pushing rod 34, an abutment frame 35 and a spring 36. The electric component 33 is an electric push rod, the pushing rod 34 is used to connect with the output end of the electric component 33, a collar is formed in the middle of the abutment frame 35, and an abutment ring is formed at the edge of the abutment frame 35, and the abutment ring is used to fix with the high elastic rubber membrane 22, wherein the embedded groove 542 on the second baffle structure 54 is annular. The collar is sleeved into the pushing rod 34, and the collar is connected to the push sliding, so that the abutment frame 35 is connected to the pushing rod 34 in a sliding manner, so that the pushing rod 34 is used to guide the abutment frame 35, and another connecting frame 6 is fixedly connected to the pushing rod 34, so that the connecting frame 6 will move together with the pushing rod 34, and the pushing rod 34 is used to be fixed with the first baffle structure 53. Thus, the first baffle structure 53 and the connecting frame 6 move together, and when the second baffle structure 54 needs to move outward, there is a sufficient high-elastic rubber film 22 between the second baffle structure 54 and the installation chamber 16. The spring 36 is sleeved on the push rod 34, and an end is formed on the connecting frame 6, which is used to contact one end of the spring 36. When the first baffle structure 53 moves outward, the first baffle structure 53 pushes the second baffle structure 54 to move outward through the connecting frame 6 and the spring 36.

[0065] More specifically, when the first baffle structure 53 and the second baffle structure 54 are closed, the spring 36 is located between the abutment frame 35 and the connection frame 6, and the length of the spring 36 is less than the distance between the abutment frame 35 and the connection frame 6. Then, when the electric component 33 drives the push rod 34 to move, the first baffle structure 53 moves outward. When the first baffle structure 53 moves outward to form the first annular opening 51 between the first baffle structure 53 and the second baffle structure 54, the connection frame 6 contacts the spring 36, and the abutment frame 35 contacts the spring 36. Then, the first baffle structure 53 continues to move outward, and the connection frame 6 drives the abutment frame 35 to move outward together through the spring 36, thereby realizing the opening of the second baffle structure 54, thereby directly using one electric component 33 to realize the movement of the first baffle structure 53, the second baffle structure 54 and the connection frame 6 at the same time. At the same time, it also better ensures that fewer electric structures are placed in a smaller space in the installation chamber 16, which is convenient for wiring. More specifically, the push rod 34, the connecting frame 6, the abutting frame 35 and the spring 36 are all located in the expansion control chamber 21. Thus, the edges of the high elastic rubber membrane 22 are connected to form the expansion control chamber 21. Therefore, only an external drive is needed to drive the push rod 34 to move, so that the high elastic rubber membrane 22 can move closer to and away from the stopper 5, and the control of the high elastic rubber membrane 22 is more stable.

[0066] In some schemes, the push rod 34 forms an insertion portion 341 on the connecting frame 6, the high elastic rubber membrane 22 is wrapped on the insertion portion 341, and the high elastic rubber membrane 22 is fixed to the insertion portion 341, so that an outwardly protruding portion is formed on the outside of the high elastic rubber membrane 22. In addition, a snap ring 371 is set at the output end of the electric component 33, the snap ring 371 is inserted into the insertion portion 341, the snap ring 371 is tightly matched with the insertion portion 341, the snap ring 371 is fixed to the high elastic rubber membrane 22 at the position of the insertion portion 341 and the insertion portion 341, and the electric component 33 directly drives the snap ring 371 to move to realize the movement of the push rod 34. Therefore, while ensuring that the inside of the high elastic rubber membrane 22 is a complete and sealed whole, the movement of the first baffle structure 53, the second baffle structure 54 and the connecting frame 6 can also be realized.

[0067] In other solutions, the electric component 33 includes: a push plate 37 and a pneumatic element 38, and the pneumatic element 38 adopts an air pump. The air pump element injects air into the installation chamber 16 and extracts air from the installation chamber 16 by setting a pipeline, so that the pneumatic element 38 injects air into the installation chamber 16 where the abutment plate is away from the blocker 5. As the gas increases or decreases, the push plate 37 moves in the installation chamber 16, and the push plate 37 moves close to the blocker 5 or away from the blocker 5. The push plate 37 is provided with a bayonet, and the bayonet is provided with a snap ring 371 in the above solution, so that the push plate 37 is fixed to the push rod 34 and the high elastic rubber membrane 22, so that the push plate 37 will drive the push rod 34 to move together during the movement of the push plate 37 in the installation chamber 16. Since the spatial size of the installation chamber 16 is limited, the driving form of the electric push rod is related to the length size of the electric push rod, and the cylinder and the hydraulic cylinder are also related to the length size. Therefore, by using the injection and exhaust drive method, the size limitation of the installation chamber 16 can be avoided, so that the moving stroke of the push plate can be controlled automatically.

[0068] In other schemes, a connecting groove 342 is provided in the middle of the push rod 34, and after the high elastic rubber membrane 22 is wrapped on the inserting portion 341, a gap is provided in the middle of the high elastic rubber membrane 22, and the gap is connected to the connecting groove 342. The connecting groove 342 is connected to the expansion control chamber 21, so that the pneumatic element 38 in the above scheme can also add air to the expansion control chamber 21. Thus, the push plate 37 is controlled, and the expansion control chamber 21 is also controlled. Preferably, two pneumatic elements 38 are provided, one of which is used to control the movement of the push plate 37, and the other pneumatic element 38 is used to control the expansion and contraction of the expansion control chamber 21 through the gap and the connecting groove 342.

[0069] The edge of the connecting frame 6 in the above solution is pressed against the inner wall surface of the installation chamber 16 , so that the high elastic rubber membrane 22 is pressed against the inner wall surface of the installation chamber 16 .

[0070] Example 9

[0071] The difference from the above embodiment is that: Since the expansion degree of the high elastic rubber membrane 22 is limited, when the high elastic rubber membrane 22 forms the protrusion 152, the protrusion 152 can only be partially embedded in the air area 144, and after the high elastic rubber membrane 22 is partially embedded in the air area 144, the expansion degree of the high elastic rubber membrane 22 reaches the limit, so it is difficult for the high elastic rubber membrane 22 to completely fill the air area 144. To this end, in this embodiment, an auxiliary expansion body is formed on the flexible expansion member 2 to solve this problem.

[0072] The auxiliary expansion body forms an auxiliary chamber that can expand and contract; the flexible expansion member 2 and the auxiliary expansion body are connected by an elastic tightening structure; the elastic tightening structure is used to form a connecting chamber; the tightening structure is used to configure the connecting chamber to connect the auxiliary chamber with the expansion control chamber 21 when the pressure in the expansion control chamber 21 is greater than a preset pressure. Specifically, the auxiliary expansion body and the high-elastic rubber membrane 22 in this scheme are the same. The auxiliary expansion body is a cloth body whose edge is fixed to the high-elastic rubber membrane 22 after being stretched and deformed. The high-elastic rubber membrane 22 is provided with air holes, which are blocked by the auxiliary expansion body, and then the tightening structure blocks the air holes, so that under normal circumstances, only the high-elastic rubber membrane 22 will expand, and the auxiliary expansion body will not expand.

[0073] In some embodiments, the tightening structure uses a pressure valve, which opens when the pressure in the high-elastic rubber membrane 22 exceeds a preset pressure, so that the gas in the high-elastic rubber membrane 22 enters the auxiliary expansion body, and the auxiliary expansion body begins to expand.

[0074] In other schemes, the tightening structure adopts a high-elastic rubber sleeve, which is fixed to the air vent. The high-elastic rubber sleeve uses its own elasticity to keep the air vent in a blocked state, and is stretched open when the pressure in the high-elastic rubber membrane 22 exceeds the preset pressure, so that the gas in the high-elastic rubber membrane 22 enters the auxiliary expansion body, and the auxiliary expansion body begins to expand.

[0075] When the auxiliary chamber cannot expand and the pressure in the auxiliary chamber has reached the preset pressure, the auxiliary expansion body can expand, and the auxiliary expansion body can continue to expand and reach a position that the flexible expansion member 2 cannot reach, so that the air chamber can be filled with more of the flexible expansion member 2 or the auxiliary expansion body, so that only the storage area 143 and a very small air area 144 exist in the ventilation chamber 111, so that the speed of ventilating the air into argon is faster. In some cases, the ventilation chamber 111 can be kept in a vacuum state as much as possible, and only the support frame 14 and the composite rolling roller to be heat treated exist in the ventilation chamber 111, which is more conducive to increasing the speed of argon injection and improving the purity of argon in the heat treatment chamber 11.

[0076] Refer to the attached Fig.21 In some other embodiments, a limit plate is provided on the push rod 34, a part of the push rod 34 is a non-retractable rod body, and a part of the push rod 34 is a retractable rod body, a limit member 7 is provided on the non-retractable rod body of the push rod 34, and the limit member 7 is a plate body, and the push plate 37 is fixed to the clamping ring 371, and the clamping ring 371 is fixed to the retractable rod body part. Then, when the push plate 37 moves close to the stopper 5, the push plate 37 first drives the connecting frame 6 to move, so that the high elastic rubber mold part will move toward the stopper 5, and the connecting frame 6 When contacting with the limit member 7, the push plate 37 drives the non-retractable part of the push rod 34 to move through the connecting frame 6 and the limit member 7, thereby starting to drive the first baffle structure 53 to move, and then the limit member 7 on the push rod 34 contacts with the spring 36, the spring 36 is compressed, and the spring 36 pushes the abutment frame 35 to move, and the abutment frame 35 drives the second baffle structure 54 to move, thereby realizing the movement of the first baffle structure 53 and the second baffle structure 54, and forming the first annular opening 51 and the second annular opening 52.

[0077] The purpose of this embodiment is to enable the high elastic rubber membrane 22 to move independently. Since in the above embodiment, the push plate 37 moves together with the push rod 34, the high elastic rubber membrane 22 also moves when the first baffle structure 53 moves. Therefore, when the first baffle structure 53 is closed, the high elastic rubber membrane 22 stops moving immediately after the first baffle structure 53 is closed. Therefore, when the vacuum insulation chamber 18 is formed, it is entirely controlled by the expansion chamber in the high elastic rubber membrane 22 being in a negative pressure state, and the control effect is slightly insufficient. In this embodiment, after the first baffle structure 53 is closed, the push plate 37 and the connecting member can continue to drive the high elastic rubber membrane 22 to move away from the baffle 5, so as to better form the vacuum insulation chamber 18. More specifically, the retractable rod body is an elastic rod, which is composed of a telescopic rod and a tension spring. The tension spring is fixed to both ends of the telescopic rod. When the vacuum insulation chamber 18 is formed, the tension spring is in a stretched state, and when the first annular opening 51 and the second annular opening 52 are opened, the tension spring is in a normal state.

[0078] Example 10

[0079] A heat treatment process for the above-mentioned high-vanadium and high-niobium alloy composite rolling roller; the heat treatment process comprises: placing a support frame 14 for holding the composite rolling roller to be heat treated into a heat treatment furnace 1 having a heat treatment chamber 11; injecting gas into a flexible expansion member 2 having an expansion control chamber 21 through a driving member 3, so that the flexible expansion member 2 can expand to abut against the support frame 14 or partially wrap the support frame 14 or completely wrap the support frame 14; and making the flexible expansion member 2 and the heat treatment chamber 11 form a ventilation chamber 111 that at least partially wraps the support frame 14; injecting argon gas into the ventilation chamber 111 through an atmosphere control member 4 and exhausting other gases in the ventilation chamber 111; after the flexible expansion member 2 expands, the volume of the flexible expansion member 2 in the heat treatment chamber 11 becomes larger, so that the volume of the ventilation chamber 111 is smaller than the volume of the heat treatment chamber 11.

[0080] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-vanadium and high-niobium alloy composite roll, characterized in that: The composite roller comprises a roller body and a roller core; an inner groove is formed in the middle of the roller body, and the roller core is located in the inner groove, so that the roller body completely wraps the roller core; The roller body is composed of the following materials: Carbon 1.0%-1.5%; Silicon 0.8%-1.2%; Manganese 0.3%-1.0%; Chromium 7.5%-10.0%; Molybdenum 1.0%-2.0%; Vanadium 2.5%-5.0%; Niobium 0.8%-2.0%; The rest is iron; The roller core is made of high-toughness cast steel material.

2. A heat treatment device for preparing the high-vanadium and high-niobium alloy composite roll according to claim 1, characterized in that: include: A heat treatment furnace, used to form a heat treatment chamber for heating the composite roll, a control door for controlling the opening and closing of the heat treatment chamber, and a bearing structure for bearing a support frame; The bearing structure is arranged in the heat treatment chamber, and the support frame is used to place the composite roll to be heat treated; A flexible expansion member connected to the heat treatment furnace, and the flexible expansion member is used to form an expansion control chamber; A driving member, used for injecting a fluid medium into the expansion control chamber, so that the flexible expansion member expands to abut against the support frame or partially wrap the support frame or completely wrap the support frame, so that the flexible expansion member and the heat treatment chamber form a ventilation chamber that at least partially wraps the support frame; An atmosphere control member, used for injecting argon gas into the gas exchange chamber and exhausting other gases in the gas exchange chamber; Wherein, after the flexible expansion member expands, the volume of the flexible expansion member in the heat treatment chamber increases, so that the volume of the ventilation chamber is smaller than the volume of the heat treatment chamber.

3. The heat treatment equipment for high-vanadium and high-niobium alloy composite rolls according to claim 2, characterized in that: The support frame has multiple layers of accommodation space; each layer of the accommodation space forms a storage area where the composite roll to be heat treated is placed and an air area where the composite roll to be heat treated is not placed; The elastic expansion member is used to form a seal portion with a variable shape; after the elastic expansion member is expanded, the seal portion forms an abutment surface in contact with the support frame, and an air area protrusion partially or completely embedded in the accommodating space is formed on the abutment surface.

4. The heat treatment equipment for high-vanadium and high-niobium alloy composite rolls according to claim 2, characterized in that: The heat treatment furnace also forms an installation chamber; the installation chamber is connected to the heat treatment chamber through a connection port; The connection port is provided with a stopper; the driving member is also used to drive the stopper to move to a first position for opening the connection port and a second position for closing the connection port; The driving member is also used to make the flexible expansion member have an expansion state and a contraction state; When the stopper moves to the first position, the flexible expansion member is in the expanded state; when the stopper moves to the second position, the flexible expansion member is in the contracted state; When the flexible expansion member is in the expanded state, the volume of the flexible expansion member in the heat treatment chamber increases; When the flexible expansion member is in the contracted state, the flexible expansion member is completely contracted into the installation chamber.

5. The heat treatment equipment for high-vanadium and high-niobium alloy composite rolls according to claim 4, characterized in that: When the blocking member is located at the first position, the blocking member is used to form a first annular opening and a second annular opening in the connecting opening; the outer circle of the first annular opening is located inside the inner circle of the second annular opening; The first annular opening is used for the flexible expansion member to expand outward, so that the flexible expansion member expands to form the abutment surface and the protrusion; The second annular opening is used for allowing the flexible expansion member to expand outward, so that the flexible expansion member expands to the area between the support frame and the heat treatment chamber; When the blocking member is located at the second position, the first annular opening and the second annular opening are closed.

6. The heat treatment equipment for high-vanadium and high-niobium alloy composite rolls according to claim 4 or 5, characterized in that: When the driving member drives the blocking member to move from the second position to the first position, the driving member also causes the flexible expansion member to expand until it is in close contact with the side of the blocking member away from the heat treatment chamber.

7. The heat treatment equipment for high-vanadium and high-niobium alloy composite rolls according to claim 4 or 5, characterized in that: The flexible expansion member at least comprises a high elastic rubber membrane capable of forming the expansion control chamber; When the blocking member is located at the second position, the driving member draws the fluid medium out of the expansion control chamber so that the flexible expansion member is in a contracted state; When the flexible expansion member is in the contracted state, a vacuum heat-insulating chamber is formed between the high-elasticity rubber mold and the stopper.

8. The heat treatment equipment for high-vanadium and high-niobium alloy composite rolls according to claim 4 or 5, characterized in that: The flexible expansion member and the driving member are each provided with two groups; The control door is provided with a door body cavity, wherein one group of the flexible expansion members is arranged in the door body cavity, and another group of the flexible expansion members is arranged in the installation cavity; Two stoppers are provided, one of which is located between the inner cavity of the door body and the heat treatment chamber, and the other is located between the installation chamber and the heat treatment chamber; When the blocking member is located at the first position, the two groups of flexible expansion members are butted together to form the ventilation chamber that can fully wrap the support frame.

9. The heat treatment equipment for high-vanadium and high-niobium alloy composite rolls according to claim 4 or 5, characterized in that: An auxiliary expansion body is formed on the flexible expansion member; the auxiliary expansion body forms an auxiliary chamber capable of expansion and contraction; The flexible expansion member and the auxiliary expansion body are connected by an elastic tightening structure; the elastic tightening structure is used to form a connection chamber; The tightening structure is used to configure the connecting chamber to connect the auxiliary chamber with the expansion control chamber when the pressure in the expansion control chamber is greater than a preset pressure.

10. A heat treatment process for preparing the high-vanadium and high-niobium alloy composite roll according to claim 1, characterized in that: The following steps are involved: Placing a support frame for holding the composite roll to be heat-treated into a heat-treatment furnace having a heat-treatment chamber; Injecting gas into a flexible expansion member having an expansion control chamber through a driving member, so that the flexible expansion member can expand to abut against the support frame or partially wrap the support frame or completely wrap the support frame; and the flexible expansion member and the heat treatment chamber form a ventilation chamber that at least partially wraps the support frame; Injecting argon gas into the gas exchange chamber and exhausting other gases in the gas exchange chamber through an atmosphere control member; After the flexible expansion member expands, the volume of the flexible expansion member in the heat treatment chamber increases, so that the volume of the ventilation chamber is smaller than the volume of the heat treatment chamber.

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