Electroslag remelting device and process

Abstract

The invention relates to the technical field of electroslag remelting, in particular to an electroslag remelting device which comprises a left stand column, a right stand column, a connecting beam, a clamping device, a moving device, a slag feeding device, a remelting device and an electrode, the top of the left stand column is connected with the top of the right stand column through the connecting beam, and the moving device is arranged on the left stand column and connected with the slag feeding device. A clamping device is arranged on the right stand column, an electrode is clamped by the clamping device, and a remelting device is arranged below the electrode. Air is isolated through argon, surface treatment is carried out on the electrode before remelting treatment, impurities in metal are reduced, the purity of the material is improved, and the mechanical performance of the product is improved; the processes of air cooling, cold annealing and the like are adopted, so that the stability of the metal is kept, changes caused by too fast cooling are avoided, and the toughness and impact resistance of the metal are improved; the auxiliary electrode is welded to the top of the electrode for remelting treatment, so that the treatment speed is increased, and the working efficiency is improved.

Description

[Technical field]

[0001] The present invention relates to the technical field of electroslag remelting, and more specifically, to an electroslag remelting device and process. [Background technology]

[0002] A metal electroslag furnace (also known as an electroslag remelting furnace) is a metallurgical equipment that uses the resistance heat generated when electric current passes through molten slag as a heat source for smelting. Its structure mainly includes a crystallizer that is overall furnace-shaped, a column located on one side of the crystallizer, a horizontal cantilever is arranged above the column, and an electrode rod extending downward into the crystallizer is installed on the horizontal cantilever, facing the crystallizer with an electrode rod clamp.

[0003] An existing crystallizer, electroslag remelting device and electroslag remelting method for metal electroslag remelting, with announcement number CN 111118302 B, includes an upper crystallization chamber, a middle crystallization chamber and a lower crystallization chamber stacked in sequence from top to bottom, and the three crystallization chambers respectively have an upper smelting chamber, a middle smelting chamber and a lower smelting chamber that penetrate each corresponding crystallization chamber from top to bottom, and the middle smelting chamber is in an inverted cone shape, with the large end docked with the upper smelting chamber and the small end docked with the lower smelting chamber. The invention is to extract the solidified electroslag ingot from the crystallizer without affecting the stability of the entire electroslag process, and directly water-cool the high-temperature electroslag ingot to increase the cooling rate. This invention processes the electroslag through different smelting chambers, but because the electroslag is in direct contact with the air, the surface of the electroslag is oxidized, affecting the quality of subsequent products. At the same time, it is difficult to extract the electroslag ingot from the crystallization chamber, which is not conducive to actual production use. [Summary of the invention]

[0004] In order to overcome the above-mentioned defects of the prior art, the purpose of the present invention is to provide an electroslag remelting device and process, which can realize rapid remelting of the electrode by setting an auxiliary electrode, and isolate the air by argon gas to improve product quality.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electroslag remelting device, comprising a left column, a right column, a connecting beam, a clamping device, a moving device, a slag feeding device, a remelting device, and an electrode. The left column is connected to the top of the right column by a connecting beam, a moving device is provided on the left column, the moving device is connected to the slag feeding device, a clamping device is provided on the right column, the clamping device clamps the electrode, and a remelting device is provided under the electrode.

[0006] Preferably, a movable track 1 is provided on the upper side of the left column, and a movable track 2 is provided on the upper side of the right column.

[0007] Preferably, the clamping device includes a support frame, a mobile motor, a connecting block, an axle, a mobile wheel, and a clamping block. The support frame is arranged on the right column, a mobile motor is arranged on the outer side of the support frame, a connecting block is fixed on the bottom of the support frame, the connecting block is passed through the axle, mobile wheels are arranged on both sides of the axle, both sides of the mobile wheel are arranged in mobile guide rails, and a clamping block is provided on the inner side of the support frame.

[0008] Preferably, the clamping block can be opened and closed laterally to fix the electrode.

[0009] Preferably, the moving device includes two support frames, two moving motors, two connecting blocks, two axles, and two moving wheels. The two support frames are arranged on the left column, two moving motors are arranged on the outside of the two support frames, two connecting blocks are fixed on the bottom of the two support frames, the two connecting blocks are passed through by the two axles, two moving wheels are arranged on both sides of the two axles, and both sides of the two moving wheels are arranged in the one moving guide rail.

[0010] Preferably, a slag feeding device is connected to the lower side of the support frame 2, and the slag feeding device includes a storage device, and the storage device is connected to the support frame 2 via a connecting pipe. A slag feeding pipe is provided on the inner side of the support frame 2 to connect with the remelting device.

[0011] Preferably, the remelting device includes a remelting chamber, a cooling pipe, an air cooler, and a sealing sleeve. The cooling pipe is evenly arranged outside the remelting chamber, the air cooler is arranged at the bottom of the remelting chamber, and the sealing sleeve is arranged at the top of the remelting chamber.

[0012] Preferably, the sealing sleeve is connected to an argon gas inlet device and is sealed using argon gas.

[0013] Preferably, the electrode comprises an electrode body and an auxiliary electrode, and the auxiliary electrode is welded on the top of the electrode body.

[0014] An electroslag remelting process specifically includes the following steps: S1, casting a whole electrode embryo; S2, sawing the cast electrode embryo into sections; S3, welding the auxiliary electrode to the top of the electrode after surface treatment after sawing; S4, clamping the auxiliary electrode, placing the electrode body into a remelting device, and placing solid slag and liquid slag in the remelting device for remelting; S5, after remelting, annealing by cold annealing or hot charging annealing; S6, after remelting, cooling by air cooling or slow cooling; S7, after the electrode is cooled, performing finishing treatment on it.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The electroslag remelting device and process of the present invention isolates the air by argon gas and performs surface treatment on the electrode before remelting, which greatly reduces impurities in the metal, improves the purity and uniformity of the material, and improves the mechanical properties of the product;

[0017] 2. The electroslag remelting device and process of the present invention adopt air cooling, cold annealing and other processes, which are helpful to maintain the structural stability of the metal and avoid structural changes caused by too fast cooling. At the same time, the process can improve the toughness and impact resistance of the metal;

[0018] 3. The electroslag remelting device and process of the present invention adopts auxiliary electrodes welded on the top of the electrode to perform remelting treatment, thereby improving the processing speed and accelerating the work efficiency.

Brief Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of an electroslag remelting device of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of a remelting device of an electroslag remelting device of the present invention;

[0021] Figure 3 This is a process flow chart of electroslag remelting of the present invention;

[0022] In the figure: 1-left column, 11-moving track 1, 2-right column, 21-moving track 2, 3-connecting beam, 4-clamping device, 41-support frame 1, 42-moving motor 1, 43-connecting block 1, 44-axle 1, 45-moving wheel 1, 46-clamping block, 5-moving device, 51-support frame 2, 52-moving motor 2, 53-connecting block 2, 54-axle 2, 55-moving wheel 2, 6-slag feeding device, 61-storage device, 62-connecting pipe, 63-slag feeding pipe, 7-remelting device, 71-remelting chamber, 72-cooling pipe, 73-air cooler, 74-sealing sleeve, 8-electrode, 81-electrode body, 82-auxiliary electrode. [Specific implementation method]

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1In an embodiment of the present invention, an electroslag remelting device includes a left column 1, a right column 2, a connecting beam 3, a clamping device 4, a moving device 5, a slag feeding device 6, a remelting device 7, and an electrode 8. The left column 1 is connected to the top of the right column 2 by a connecting beam 3. A moving track 11 is provided on the upper side of the left column 1, and a moving track 21 is provided on the upper side of the right column 2. A moving device 5 is provided on the left column 1. The moving device 5 includes a supporting frame 2 51, a moving motor 2 52, a connecting block 2 53, an axle 2 54, and a moving wheel 2 55. The supporting frame 2 51 is arranged on the left column 1, and a moving motor 2 52 is provided on the outer side of the supporting frame 2 51. A connecting block 2 53 is fixed to the bottom of the supporting frame 2 51. The connecting block 2 53 is passed through by the axle 2 54. Moving wheels 2 55 are provided on both sides of the axle 2 54. Both sides of the moving wheel 2 55 are arranged in the moving guide rail 11. The supporting frame 2 51 is below A slag feeding device 6 is connected, wherein the slag feeding device 6 comprises an argon storage device 61, and the argon storage device 61 is connected to the support frame 51 through a connecting pipe 62. A slag feeding pipe 63 is provided on the inner side of the support frame 51 to connect to the remelting device 7. A clamping device 4 is provided on the right column 2, and the clamping device 4 comprises a support frame 41, a moving motor 42, a connecting block 43, an axle 44, a moving wheel 45, and a clamping block 46. The support frame 41 is arranged on the right column 2, a moving motor 42 is provided on the outer side of the support frame 41, a connecting block 43 is fixed to the bottom of the support frame 41, the connecting block 43 is passed through by the axle 44, moving wheels 45 are provided on both sides of the axle 44, and both sides of the moving wheel 45 are arranged in the moving guide rail 21, a clamping block 46 is provided on the inner side of the support frame 41, and the clamping block 46 can be opened and closed laterally to fix the top of the electrode 8, and a remelting device 7 is provided below the electrode 8.

[0025] See also Figure 2 In an embodiment of the present invention, an electroslag remelting device is provided, wherein the remelting device 7 comprises a remelting chamber 71, a cooling pipe 72, an air cooler 73, and a sealing sleeve 74. The cooling pipe 72 is evenly arranged outside the remelting chamber 71, an air cooler 73 is arranged at the bottom of the remelting chamber 71, a sealing sleeve 74 is arranged at the top of the remelting chamber 71, the sealing sleeve 74 is connected to an argon gas inlet device and is sealed with argon gas. An electrode 8 is arranged in the remelting chamber 71, and the electrode 8 comprises an electrode main body 81 and an auxiliary electrode 82. The auxiliary electrode 82 is welded on the top of the electrode main body 81.

[0026] See also Figure 3 In an embodiment of the present invention, an electroslag remelting process specifically includes the following steps:

[0027] S1, casting the whole electrode embryo;

[0028] S2, sawing the electrode casting blank into sections after casting;

[0029] S3, after the sawn electrode is surface treated, the auxiliary electrode is welded to the top of the electrode;

[0030] S4, clamping the auxiliary electrode, placing the electrode body into the remelting device, and placing the solid slag and liquid slag into the remelting device for remelting;

[0031] S5. After remelting, annealing is performed by cold annealing or hot annealing;

[0032] S6. After remelting, air cooling or slow cooling is used for cooling;

[0033] S7. After the electrode is cooled, it is subjected to finishing treatment.

[0034] The present invention discloses an electroslag remelting device and process. The air is isolated by argon gas, and the surface of the electrode is treated before the remelting process, thereby greatly reducing impurities in the metal, improving the purity and uniformity of the material, and improving the mechanical properties of the product. The air cooling, cold annealing and other processes are adopted to help maintain the organizational stability of the metal, avoid organizational changes caused by too fast a temperature drop, and improve the toughness and impact resistance of the metal. The auxiliary electrode is welded to the top of the electrode for remelting treatment, thereby accelerating the work efficiency.

[0035] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. An electroslag remelting device, characterized in that: The invention comprises a left column (1), a right column (2), a connecting beam (3), a clamping device (4), a moving device (5), a slag feeding device (6), a remelting device (7), and an electrode (8). The left column (1) is connected to the top of the right column (2) via a connecting beam (3). The left column (1) is provided with a moving device (5), and the moving device (5) is connected to the slag feeding device (6). The right column (2) is provided with a clamping device (4), and the clamping device (4) clamps the electrode (8). The remelting device (7) is provided below the electrode (8).

2. An electroslag remelting device according to claim 1, characterized in that: The upper side of the left column (1) is provided with a movable track 1 (11), and the upper side of the right column (2) is provided with a movable track 2 (21).

3. An electroslag remelting device according to claim 1, characterized in that: The clamping device (4) comprises a support frame (41), a moving motor (42), a connecting block (43), an axle (44), a moving wheel (45), and a clamping block (46). The support frame (41) is arranged on the right column (2). A moving motor (42) is arranged on the outside of the support frame (41). A connecting block (43) is fixed on the bottom of the support frame (41). The connecting block (43) is passed through by the axle (44). Moving wheels (45) are arranged on both sides of the axle (44). Both sides of the moving wheel (45) are arranged in the moving guide rail (21). A clamping block (46) is arranged on the inside of the support frame (41).

4. An electroslag remelting device as claimed in claim 3, characterized in that: The clamping block (46) can be opened and closed laterally to fix the electrode (8).

5. An electroslag remelting device according to claim 1, characterized in that: The moving device (5) comprises a second support frame (51), a second moving motor (52), a second connecting block (53), a second wheel axle (54), and a second moving wheel (55). The second support frame (51) is arranged on the left column (1). The second moving motor (52) is arranged on the outer side of the second support frame (51). The second connecting block (53) is fixed at the bottom of the second support frame (51). The second wheel axle (54) passes through the second connecting block (53). The second moving wheel (55) is arranged on both sides of the second wheel axle (54). Both sides of the second moving wheel (55) are arranged in the first moving guide rail (11).

6. An electroslag remelting device as claimed in claim 5, characterized in that: The lower part of the support frame 2 (51) is connected to a slag feeding device (6), and the slag feeding device (6) includes a storage device (61). The storage device (61) is connected to the support frame 2 (51) via a connecting pipe (62). A slag feeding pipe (63) is provided on the inner side of the support frame 2 (51) to connect to the remelting device (7).

7. An electroslag remelting device according to claim 1, characterized in that: The remelting device (7) comprises a remelting chamber (71), a cooling pipe (72), an air cooler (73), and a sealing sleeve (74); the cooling pipe (72) is evenly arranged outside the remelting chamber (71); the air cooler (73) is arranged at the bottom of the remelting chamber (71); and the sealing sleeve (74) is arranged at the top of the remelting chamber (71).

8. An electroslag remelting device according to claim 7, characterized in that: The sealing sleeve (74) is connected to an argon gas inlet device and uses argon gas for sealing.

9. An electroslag remelting device according to claim 1, characterized in that: The electrode (8) comprises an electrode main body (81) and an auxiliary electrode (82), and the auxiliary electrode (82) is welded on the top of the electrode main body (81).

10. An electroslag remelting process, characterized in that: The specific steps include: S1, casting the whole electrode embryo; S2, sawing the electrode casting blank into sections after casting; S3, after the sawn electrode is surface treated, the auxiliary electrode is welded to the top of the electrode; S4, clamping the auxiliary electrode, placing the electrode body into the remelting device, and placing the solid slag and liquid slag into the remelting device for remelting; S5. After remelting, annealing is performed by cold annealing or hot annealing; S6. After remelting, air cooling or slow cooling is used for cooling; S7. After the electrode is cooled, it is subjected to finishing treatment.

Images