Liquid bimetallic overpressure composite forming equipment and process

Abstract

The application discloses a liquid bimetallic overpressure composite forming equipment and process, and belongs to the technical field of metallurgy. The metal forming equipment comprises a press, a die and a baffle. The die comprises a lower die and an upper die matched with the press. The lower die is arranged below the upper die. The lower die is internally provided with a lower cavity. The press is used for driving the upper die to apply pressure to the lower cavity. The baffle is arranged at a predetermined position in the lower cavity of the lower die. The baffle divides the lower cavity into a first containing cavity and a second containing cavity located above the first containing cavity. In working, the first containing cavity is used for containing a first material. In the process of pouring a second material into the second containing cavity, the baffle is arranged between the first containing cavity and the second containing cavity, so that the second material sequentially contacts the baffle and the first material. The application solves the problem that the first material and the second material in the prior art are uncontrollably mixed together, the quality of a combined layer is uncontrollable, and the performance of a bimetallic forming product is affected.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical technology, specifically liquid bimetallic overpressure composite molding equipment and process. Background Technology

[0002] Currently, in the production fields of mining, building materials, and metallurgy, most plate-type spare parts used in high-load impact and wear applications are made of a single material. Liners made of wear-resistant alloy materials have high hardness and good wear resistance, but they are brittle, have low impact resistance, and are prone to breakage and fracture.

[0003] The "liquid bimetallic overpressure composite molding" production process boasts advantages such as energy saving, environmental friendliness, and high product cost-effectiveness. This technology overcomes the risks of poor impact resistance and easy breakage associated with single alloy materials. Products manufactured using this process exhibit characteristics such as excellent impact resistance and wear resistance on the working surface, superior metallurgical properties of the bonding layer, high toughness of the substrate surface, and excellent deformation resistance.

[0004] The existing liquid bimetal process involves first pouring a first material into the mold cavity, and then pouring a second material into the mold cavity based on the first material. However, during the pouring of the second material, the molten steel of the second material sinks into the first material due to inertia, causing the first and second materials to mix uncontrollably. This results in uncontrollable quality of the bonding layer, affecting the performance of the bimetallic molded product. Summary of the Invention

[0005] Purpose of the invention: To provide a liquid bimetallic high-pressure composite molding equipment and process, which solves the problem in the prior art where the first and second materials are uncontrollably mixed together, the quality of the bonding layer is uncontrollable, and the performance of bimetallic molded products is affected by the baffle set on the surface of the first material and the second material being poured in.

[0006] The technical solution of the present invention is as follows: In the first aspect, the liquid bimetal overpressure composite molding equipment includes: a press, a mold and a baffle.

[0007] The mold includes a lower mold and an upper mold that cooperate with a press. The lower mold is located below the upper mold and has a lower cavity. The press is used to drive the upper mold to apply pressure to the lower cavity.

[0008] The baffle is disposed at a predetermined position in the lower cavity of the lower mold, and the baffle divides the lower cavity into a first receiving cavity and a second receiving cavity located above the first receiving cavity.

[0009] During operation, the first receiving cavity is used to receive the first type of material. During the process of pouring the second type of material into the second receiving cavity, a baffle is provided between the first and second receiving cavities, so that the second type of material comes into contact with the baffle and the first type of material in sequence.

[0010] In a further embodiment of the first aspect, the height of the first receiving cavity accounts for 60% to 80% of the total height of the lower cavity.

[0011] In a further embodiment of the first aspect, the outer contour shape of the baffle matches the inner contour shape of the cavity below the same horizontal plane.

[0012] The outer contour area of ​​the baffle accounts for 1 / 3 to 2 / 3 of the inner contour area of ​​the cavity at the same horizontal plane.

[0013] In a further embodiment of the first aspect, the upper surface of the baffle is a roughened surface that can reduce the flow rate of the second material on the baffle, so that the second material can be evenly distributed on the baffle before contacting the first material.

[0014] In a further embodiment of the first aspect, the bottom end of the baffle is provided with a plurality of support rods, the bottom ends of the support rods abutting against the bottom wall of the lower cavity, thereby supporting the baffle.

[0015] In a further embodiment of the first aspect, the bottom wall of the lower cavity is provided with a groove that mates with the support rod. The support rod is inserted into the groove, which can limit the support rod in the radial direction and reduce the misalignment rate of the baffle.

[0016] In a further embodiment of the first aspect, the top of the baffle is provided with a closed protrusion, the closed protrusion is provided along the outer contour of the baffle, and the closed protrusion surrounds the bottom cavity with the top opening above the baffle, thereby increasing the contact area between the second material and the first material at the same time.

[0017] Secondly, the liquid bimetal overpressure composite molding process includes: using the press, mold, and baffle described in the first aspect in the liquid bimetal molding process.

[0018] The molding process includes: S100, pouring a predetermined amount of liquid first material into the lower cavity without baffles.

[0019] S101, A baffle is set on the liquid surface of the first material to divide the lower cavity into a first receiving cavity and a second receiving cavity.

[0020] S102. A predetermined amount of liquid second material is poured into the second receiving cavity, with the pouring point on the baffle, so that the second material comes into contact with the baffle and the first material in sequence.

[0021] S103. After all the casting is completed, move the lower mold to the lower platform of the press. The press drives the upper mold to move towards the lower mold, and presses the metal material in the lower cavity with a certain pressure for a certain period of time.

[0022] In a further embodiment of the second aspect, in S102, the second material is poured in at intervals of 25 to 40 seconds for every 100 kg of the second material.

[0023] The beneficial effects of this invention are: by setting a baffle between the first and second receiving cavities, the second material can sequentially contact the baffle and the first material. When the second material is poured, it can first contact the baffle and then flow from the baffle onto the first material, thereby improving the quality and quality controllability of the bonding layer. This solves the problem in the prior art where the first and second materials are uncontrollably mixed together, resulting in uncontrollable quality of the bonding layer and affecting the performance of bimetallic molded products.

[0024] After the first and second materials are contained in the lower cavity, the upper mold is driven by the press to apply pressure to the lower cavity, realizing the flat casting and flat pressing process of the metal mold. The two different steel materials are combined into a whole by upper and lower layers. The bimetallic material in the lower cavity, which is in a liquid-solid critical state, can be held under a certain pressure for a certain period of time. During the pressurization and holding process, the molten steel solidifies, crystallizes and shrinks, and the feeding is completed simultaneously, thus obtaining a product with the characteristics of impact resistance of the working surface, excellent wear performance, superior metallurgical performance of the bonding layer, high toughness of the base material surface and excellent deformation resistance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention, in which the baffle is disposed inside the mold and the mold is disposed inside the press.

[0026] Figure 2 This is a schematic diagram of the lower mold of the present invention in independent cross-section.

[0027] Figure 3 This is a schematic diagram of an embodiment of the present invention in which the lower cavity contains the first material.

[0028] Figure 4 This is a schematic diagram of an embodiment of the present invention in which the lower cavity contains the first material and the baffle.

[0029] Figure 5 This is a schematic diagram of an embodiment of the present invention in which the lower cavity contains a first material, a baffle, and a second material.

[0030] Figure 6 This is a schematic diagram of an embodiment of the baffle of the present invention, which has a support rod and a closed protrusion.

[0031] Figure 7This is a schematic diagram of the molding process of the present invention.

[0032] The attached figures are labeled as follows: press 1, mold 2, baffle 3, first material 4, second material 5, upper mold 201, lower mold 202, liquid isolation layer 301, support rod 302, and closed protrusion 303. Detailed Implementation

[0033] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0034] This application discloses a liquid bimetallic high-pressure composite molding equipment and process. By setting a baffle on the surface of the first material, when the second material is poured in, the second material first contacts the baffle and then flows from the baffle onto the first material. This solves the problem in the prior art where the first and second materials are uncontrollably mixed together, the quality of the bonding layer is uncontrollable, and the performance of the bimetallic molded product is affected.

[0035] The first embodiment of the first aspect,

[0036] like Figure 1 The liquid bimetal overpressure composite molding equipment shown includes: press 1, mold 2 and baffle 3.

[0037] The mold 2 includes a lower mold 202 and an upper mold 201 that cooperate with the press 1. The lower mold 202 is located below the upper mold 201 and has a lower cavity. The press 1 is used to drive the upper mold 201 to apply pressure to the lower cavity. The cooperation between the mold 2 and the press 1 means that the upper mold 201 is connected to the press 1. After the first material 4, the baffle 3 and the second material 5 are sequentially arranged in the lower mold 202, it is moved to the lower table of the press 1 so that the lower mold 202 cooperates with the upper mold 201.

[0038] The baffle 3 is positioned at a predetermined position within the lower cavity of the lower mold 202. The baffle 3 divides the lower cavity into a first receiving cavity and a second receiving cavity located above the first receiving cavity.

[0039] During operation, the first receiving cavity is used to contain the first material 4. During the process of pouring the second material 5 into the second receiving cavity, the baffle 3 is placed between the first and second receiving cavities, so that the second material 5 comes into contact with the baffle 3 and the first material 4 in sequence. In the prior art, the material used for castings that require bimetallic liquid composite is the first material 4, which is used to solve problems such as easy breakage and fragmentation. The second material 5 is mostly made of Q235 carbon structural steel. Therefore, the baffle 3 can be made of the same Q235 carbon structural steel as the second material 5. This steel can also be dissolved in other alloy steels to ensure a good metallurgical bonding layer.

[0040] In this embodiment, the height of the first receiving cavity accounts for 60% to 80% of the total height of the lower cavity. In a preferred embodiment, the height of the first receiving cavity accounts for 70% of the total height of the lower cavity, and the height of the second receiving cavity accounts for 30% of the total height of the lower cavity.

[0041] Regarding baffle 3

[0042] In this embodiment, the upper surface of the baffle 3 is a plane, and the outer contour shape of the baffle 3 matches the inner contour shape of the cavity below it on the same horizontal plane. The matching of contour shapes means that the outer contour of the baffle 3 is a proportional scaling of the inner contour of the cavity below it.

[0043] The outer contour area of ​​the baffle 3 accounts for 1 / 3 to 2 / 3 of the inner contour area of ​​the cavity at the same horizontal plane. In the preferred embodiment, the outer contour area of ​​the baffle 3 accounts for 2 / 3 of the inner contour area of ​​the cavity at the same horizontal plane.

[0044] In this embodiment, the upper surface of the baffle 3 is a roughened surface that has undergone a roughening treatment, wherein the roughening treatment can be shot blasting roughening treatment, sandblasting roughening treatment or laser roughening treatment.

[0045] The baffle 3, which is treated with a texturing process, can reduce the flow rate of the second material 5 on the baffle 3, and prevent the second material 5 from contacting the first material 4 too quickly along a single path, thereby further improving the product quality.

[0046] In this embodiment, as Figure 1 , 4 As shown in Figure 6, the bottom end of the baffle 3 is provided with several support rods 302, the bottom end of the support rods 302 abuts against the bottom wall of the lower cavity, and the number of support rods 302 is at least three.

[0047] The support rod 302 can support the baffle 3, preventing the baffle 3 from sinking into the liquid first material 4.

[0048] The bottom wall of the lower cavity is provided with a groove that mates with the support rod 302, and the support rod 302 is inserted into the groove.

[0049] In such Figure 6In a further embodiment shown, the groove can be a conical hole, and the bottom end of the support rod 302 has a conical structure, which facilitates the discharge of the first material 4 from the groove by the support rod 302 and facilitates the insertion of the support rod 302.

[0050] The groove can limit the radial direction of the support rod 302, reduce the misalignment rate of the baffle 3, and further ensure the controllability of product quality.

[0051] The baffle 3 can be made of the same Q235 carbon structural steel as the second material 5. When the material of the second material 5 is not Q235 carbon structural steel, the material of the baffle 3 can be the same as the second material 5 or it can be Q235 carbon structural steel.

[0052] The second embodiment of the first aspect further includes a closed protrusion 303 based on the first embodiment.

[0053] In this embodiment, the top of the baffle 3 is provided with a closed protrusion 303. The closed protrusion 303 is arranged along the outer contour of the baffle 3. The closed protrusion 303 encloses the bottom cavity with the top opening above the baffle 3. The cross section of the bottom cavity can be an inverted isosceles trapezoidal structure or an inverted cone structure as shown in the figure. The top of the closed protrusion 303 is located on the same horizontal plane.

[0054] In this embodiment, the closed protrusion 303 can be set on the baffle 3 together with the support rod 302, or the baffle 3 can be set with only the closed protrusion 303 without the support rod 302.

[0055] The bottom cavity allows the second material 5 above the baffle 3 to accumulate to a certain thickness, and then self-level within the bottom cavity before crossing the closed protrusion 303 to contact the first material 4, thereby increasing the contact area between the second material 5 and the first material 4.

[0056] Moreover, it enables the baffle 3 to float on the surface of the first material 4 without the support rod 302.

[0057] Secondly, regarding the liquid bimetal overpressure composite molding process,

[0058] The press 1, mold 2 and baffle 3 described in the first or second embodiment of the first aspect are used in the molding process.

[0059] The molding process includes: S100, pouring a predetermined amount of liquid first material 4 into the lower cavity without baffle 3.

[0060] S101, A baffle 3 is provided on the liquid surface of the first material 4 to divide the lower cavity into a first receiving cavity and a second receiving cavity.

[0061] S102. A predetermined amount of liquid second material 5 is poured into the second receiving cavity, with the pouring point on the baffle 3, so that the second material 5 comes into contact with the baffle 3 and the first material 4 in sequence.

[0062] S103. After all the casting is completed, the lower mold 202 is moved to the lower platform of the press 1. The press 1 drives the upper mold 201 to move towards the lower mold 202, and presses the metal material in the lower cavity with a certain pressure for a certain period of time.

[0063] In this embodiment, the working surface of the product can be designed on the lower surface of the lower cavity, and the first material is the material of the working surface of the product.

[0064] The casting can be done manually by a casting worker or by an automatic casting machine with a set stroke. In S102, after the second material 5 comes into contact with the partition, it can be poured by a reciprocating stroke, so that the liquid second material 5 is evenly distributed on the partition. Preferably, the second material 5 first falls to the middle position of the upper surface of the partition and is then poured along a predetermined path.

[0065] In S102, the liquid second material 5 can be evenly placed on the surface of the first layer of molten steel. The baffle 3, through two pours of liquid metal, will be evenly distributed between the two types of molten steel, forming a liquid isolation layer 301, and ensuring that the liquid bimetallic bonding layer is on a horizontal plane. The liquid isolation layer 301 can be formed during the casting of the second material 5, or it can be formed during the pressurization process due to the temperature rise in the lower cavity.

[0066] In S103, the liquid metal material can solidify, crystallize, and shrink during the pressurization and pressure holding process, and the feeding can be completed simultaneously. The pressure parameters are set according to the mold cavity volume and product volume. In this embodiment, the pressure is set to 400~500 tons and the pressure holding time is in the range of 15~20 seconds.

[0067] Furthermore, during the pressurization process of the upper mold 201, the metal in the liquid-solid critical state in the mold cavity is deformed. The application of overpressure causes the molecules to move and generate secondary high temperature. In the initial state of applying overpressure, the pores in the casting are fully closed and melted, resulting in a finer structure.

[0068] In this embodiment, in S102, the second material 5 is poured at intervals of 25 to 40 seconds for every 100 kg of the second material 5. In the preferred embodiment, the second material 5 is poured at intervals of 30 seconds for every 100 kg of the second material 5.

[0069] By setting a baffle 3 between the first and second receiving cavities, the second material 5 can come into contact with the baffle 3 and the first material 4 in sequence. When the second material 5 is poured, it can first come into contact with the baffle 3 and then flow from the baffle 3 to the first material 4, thereby improving the quality of the bonding layer and its quality controllability.

[0070] After the first material 4 and the second material 5 are contained in the lower cavity, the upper mold 201 is driven by the press 1 to apply pressure to the lower cavity, realizing the flat casting and flat pressing process of the metal mold. The two different materials of steel are combined into a whole in upper and lower layers. The bimetallic material in the lower cavity, which is in a liquid-solid critical state, can be held under a certain pressure for a certain period of time. During the pressurization and holding process, the solidification, crystallization and shrinkage of the steel are accompanied by the simultaneous completion of feeding, thus obtaining a product with the characteristics of impact resistance of the working surface, excellent wear performance, superior metallurgical performance of the bonding layer, high toughness of the base material surface and excellent deformation resistance.

[0071] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A liquid bimetallic superplastic composite forming apparatus, characterized by, include: Press, mold, and baffle; The mold includes: a lower mold and an upper mold that cooperate with a press, the lower mold being disposed below the upper mold, the lower mold having a lower cavity, and the press being used to drive the upper mold to apply pressure to the lower cavity; The baffle is disposed at a predetermined position in the lower cavity of the lower mold, and the baffle divides the lower cavity into a first receiving cavity and a second receiving cavity located above the first receiving cavity; During operation, the first receiving cavity is used to receive the first type of material. During the process of pouring the second type of material into the second receiving cavity, a baffle is set between the first and second receiving cavities. The outer contour area of ​​the baffle is smaller than the inner contour area of ​​the cavity at the same horizontal plane, so that the second type of material comes into contact with the baffle and the first type of material in sequence. The upper surface of the baffle is a roughened surface that has undergone a roughening process.

2. The liquid bimetallic super-composite forming apparatus according to claim 1, wherein, The height of the first receiving cavity accounts for 60% to 80% of the total height of the lower cavity.

3. The liquid bimetallic super-composite forming apparatus according to claim 1, wherein, The outer contour shape of the baffle matches the inner contour shape of the cavity below it on the same horizontal plane; The outer contour area of ​​the baffle accounts for 1 / 3 to 2 / 3 of the inner contour area of ​​the cavity at the same horizontal plane.

4. The liquid bimetallic super-composite forming apparatus according to claim 1, wherein, The bottom end of the baffle is provided with several support rods, and the bottom end of the support rods abuts against the bottom wall of the lower cavity.

5. The liquid bimetallic overpressure compound forming apparatus according to claim 4, wherein The bottom wall of the lower cavity is provided with a groove that mates with the support rod, and the support rod is inserted into the groove.

6. The liquid bimetallic overpressure composite forming apparatus of claim 1, wherein, The top of the baffle is provided with a closed protrusion, which is arranged along the outer contour of the baffle and encloses a bottom cavity with a top opening above the baffle.

7. The liquid bimetallic overpressure compound forming apparatus according to claim 1, wherein The baffle material is the same as the second material.

8. Liquid bimetallic overpressure composite forming process, characterized in that, The liquid bimetal overpressure composite molding equipment according to any one of claims 1-7 is used in the liquid bimetal forming process; The molding process includes: S100, pouring a predetermined amount of liquid first material into the lower cavity without baffles; S101, A baffle is provided on the liquid surface of the first material to divide the lower cavity into a first receiving cavity and a second receiving cavity; S102. A predetermined amount of liquid second material is poured into the second receiving cavity, with the pouring point on the baffle, so that the second material comes into contact with the baffle and the first material in sequence. S103. After all the casting is completed, move the lower mold to the lower platform of the press. The press drives the upper mold to move towards the lower mold, and presses the metal material in the lower cavity with a certain pressure for a certain period of time.

9. The liquid bimetallic superplastic composite forming process of claim 8 wherein, In S102, the second material is poured in at intervals of 25 to 40 seconds for every 100 kg of the second material.

10. The liquid bimetallic superplastic composite forming process of claim 8 wherein, In S102, the second material can be poured using a reciprocating stroke after contacting the partition.

Images