4J42 kovar alloy hot continuous rolling plate coil and acid pickling surface treatment process

Abstract

The invention discloses a 4J42 Kovar alloy hot continuous rolling plate coil and a pickling surface treatment process. The 4J42 Kovar alloy hot continuous rolling plate coil is characterized in that a Kovar alloy plate comprises the following chemical components in percentage by weight: not less than 40% and not more than 43% of Ni, not more than 1.0% of Co, not more than 0.05% of C, not more than 0.8% of Mn, not more than 0.3% of Si and not more than 0.02% of P; s is less than or equal to 0.02%; the process comprises the following steps: 1) preparing materials and heating; 2) rough rolling; (3) descaling; 4) finish rolling; 5) laminar cooling; (6) coiling; (7) uncoiling and welding; 8) annealing; 9) pickling; 10) cleaning and drying; the laminar cooling device comprises a rack and a cooling mechanism; the rack is fixed on the ground; the cooling mechanism is mounted on the rack; the pickling device comprises a box body, a feeding hole and a discharging hole; the box body is fixed to the ground, and the feeding port and the discharging port are located in the two ends of the box body respectively. The laminar flow pipe below the kovar alloy plate is prevented from being blocked; the oxide skin can be prevented from being accumulated on the two sides of the chain plate, and the accumulated oxide skin can be prevented from scratching the side wall of the kovar alloy plate.

Description

Technical Field

[0001] The present invention belongs to the technical field of Kovar alloy hot-rolled coil and pickling, and in particular relates to a 4J42 Kovar alloy hot-rolled coil and a pickling surface treatment process. Background Art

[0002] 4J42 Kovar alloy plate is an excellent iron-nickel-based alloy primarily composed of nickel, iron, cobalt, carbon, manganese, silicon, phosphorus, and sulfur. Due to its low coefficient of expansion, good thermal conductivity, and excellent mechanical properties, it is widely used in the aerospace, precision instrument, and electronics industries. 4J42 Kovar alloy plate is produced through hot rolling and pickling, requiring laminar cooling and pickling.

[0003] After searching, the prior art publication number CN119327867A is a production method of 4J42 Invar alloy hot-rolled plate and strip, which includes the following steps: Step 1: Heating furnace temperature control: The 4J42 slab is heated in a heating furnace, and the heating furnace is divided into three heating sections: one heating section, two heating sections, and a soaking section; Step 2: Rough rolling: The heated slab is subjected to a primary descaling pass and then rough rolled, using seven rough rolling passes; Step 3: After rough rolling, the intermediate slab is edge heated; Step 4: The intermediate slab is subjected to reduction rate control on each finishing rolling stand.

[0004] After searching, it was found that a pickling device for metal strips with the prior art publication number CN116083923A includes: a reinforcement box, one of the two sides of the reinforcement box arranged along its length direction is provided with a washing inlet, and the other side is provided with a discharge outlet, a drainage hole is provided on the reinforcement box, a pickling tank is installed in the reinforcement box, and the top of the pickling tank is rotatably connected to two guide rollers arranged symmetrically along its length direction; its processing process has the following disadvantages: some oxide scales and impurities are tightly adhered to the surface of the metal strip under the squeezing of the pinch rollers and the pressure rollers, and these oxide scales and impurities cannot be removed by pickling alone, thereby affecting the surface quality of the metal strip. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a 4J42 Kovar alloy hot-rolled coil and pickling surface treatment process, in which the upper shield and the lower shield can shield the side of the Kovar alloy plate; the telescopic plate pulls out the oxide belt stuck between the inclined plates, thereby preventing the laminar flow tube below the Kovar alloy plate from being blocked; the oxide scale is discharged through the gap between the shaft sleeve and the rotating roller, thereby preventing the oxide scale from accumulating on both sides of the chain plate, further preventing the chain plate from getting stuck, and preventing the accumulated oxide scale from scratching the side wall of the Kovar alloy plate.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A 4J42 Kovar alloy hot-rolled coil and a pickling surface treatment process, wherein the chemical composition of the Kovar alloy plate is as follows by weight: 40%≤Ni≤43%, Co≤1.0%, C≤0.05%, Mn≤0.8%, Si≤0.3%, P≤0.02%; S≤0.02%, and the balance is Fe.

[0008] The process steps are as follows: 1) Material preparation and heating: The Kovar alloy slab is transported to a heating furnace for heating. The temperature of the first heating stage is 940±8°C; the temperature of the second heating stage is 1080±12°C; the temperature of the soaking stage is 1180±12°C; and the heating rate is 1.2 min / mm.

[0009] 2) Rough rolling: The heated Kovar alloy plate is transported to the rough rolling mill through the transport rollers and then subjected to rough rolling;

[0010] 3) Descaling: Descaling the Kovar alloy plate after rough rolling;

[0011] 4) Finish rolling: The descaled Kovar alloy plate is finished by a finishing mill; the finishing rolling has 7 passes: the first pass has a reduction rate of 21-23%; the second pass has a reduction rate of 24-26%; the third pass has a reduction rate of 24-26%; the fourth pass has a reduction rate of 23-25%; the fifth pass has a reduction rate of 20-23%; the sixth pass has a reduction rate of 16-18%; the seventh pass has a reduction rate of 14-16%

[0012] 5) Laminar cooling: The laminar cooling device is used to cool the Kovar alloy plate after finishing rolling;

[0013] 6) Coiling: Coil the cooled Kovar alloy plate through a coiler;

[0014] 7) Uncoiling and welding: Uncoiling and welding of Kovar alloy coils;

[0015] 8) Annealing: The Kovar alloy plate is annealed in an annealing furnace at a temperature of 1063°C ± 15°C; then cooled in a cooling device;

[0016] 9) Pickling: Titanium and titanium alloy hot-rolled coils are pickled by pickling equipment. The pickling process has three sections, namely sulfuric acid zone, mixed acid zone 1, and mixed acid zone 2. a. The concentration of sulfuric acid in the sulfuric acid zone is 78g / L-113g / L, the concentration of metal ions in the sulfuric acid solution is 1.5-51.5g / L, and the pickling temperature is 39℃-51℃; b. The concentration of HNO3 in the mixed acid zone is 85.5g / L-107g / L, and the concentration of HF is 31g / L-51.5 g / L, the metal ion concentration in the acid solution is 1-43g / L, and the acid solution temperature is 53℃-66℃; c. Descaling: The chain plate in the descaling mechanism rotates to clean the stubborn oxide flakes on the surface of the Kovar alloy plate, thereby improving the pickling efficiency; d. The HNO3 concentration in the second mixed acid zone is 70.5g / L-84.5g / L, the HF concentration is 21g / L-39g / L, the metal ion concentration in the acid solution is 0-39g / L, and the acid solution temperature is 37℃-53℃;

[0017] 10) Cleaning and drying: The pickled titanium and titanium alloy hot-rolled coils are cleaned and dried in sequence through the cleaning device and the drying device, and the dried titanium and titanium alloy hot-rolled coils are coiled;

[0018] The laminar cooling device in step 5) includes a frame, a cooling mechanism, and a shielding mechanism; the frame is fixed to the ground; a plurality of transport rollers are provided on the frame, the cooling mechanism is installed on the frame and is located on the upper and lower sides of the Kovar alloy plate, and the shielding mechanism is installed on both sides of the Kovar alloy plate.

[0019] The cooling mechanism includes a support frame, a main pipe, a laminar flow pipe, and an inclined plate; the support frame is fixed on the top of the frame, and a pair of main pipes are provided, which are respectively installed on the support frame above the Kovar alloy plate and the frame below the Kovar alloy plate; the laminar flow pipe is connected to the main pipe; the inclined plate is installed on the frame below the Kovar alloy plate and is located on both sides of the laminar flow pipe.

[0020] The shielding mechanism includes a bidirectional threaded rod, an upper shielding plate, a lower shielding plate, a motor I, and a guide rod; a convex plate is provided on the frame, the bidirectional threaded rod is rotatably connected to the convex plate via a bearing, guide rods are provided on both sides of the bidirectional threaded rod, the guide rods are fixed to the convex plate, and a protective cover is provided on the outer side of the bidirectional threaded rod; the upper shielding plate is located above the Kovar alloy plate, and a movable block is provided on the upper shielding plate, which passes through the guide rod and is threadedly connected to the bidirectional threaded rod; the lower shielding plate is located between the inclined plates; the upper shielding plate and the lower shielding plate are connected by a connecting rod;

[0021] The lower shield is provided with a cleaning mechanism II, which includes a telescopic plate, a movable plate, a threaded rod, a gear IV, a motor IV, and an electric push rod I; the lower shield is provided with a movable groove, the telescopic plate is installed in the movable groove, and the movable plate is overlapped on the inclined plate; the gear IV is rotatably connected to the top of the movable plate, the threaded rod is connected to the gear IV through a thread, and one end of the threaded rod is connected to the telescopic plate; the motor IV is fixed to the top of the movable plate through a bracket, and a gear V is provided at the output end; the gear V is meshed with the gear IV, and a protective cover is provided on the outside of the gear V and the gear IV; the electric push rod I is fixed on the telescopic plate, and the output end is connected to the movable end of the telescopic plate.

[0022] The pickling device in step 9) includes a box, a feed port, a discharge port, a partition, and a descaling mechanism; the box is fixed to the ground, and the feed port and the discharge port are respectively located at both ends of the box; a plurality of partitions are provided and evenly installed inside the box, and the partitions divide the box into a pickling zone I, a descaling zone, a pickling zone II, and a washing and drying zone; the descaling mechanism is installed inside the descaling zone; a plurality of transport rollers are provided, and the transport rollers are rotatably connected to the side wall of the box through bearings; pinch rollers are provided at the feed port and the discharge port at both ends of the box; and lower pressure rollers are provided inside the pickling zone I and the pickling zone II.

[0023] The descaling mechanism includes a chain plate, a mounting plate, a rotating roller, a bushing, a transmission shaft, a motor II, and a clamp; two groups of guide grooves are provided on the inner wall of the box body, and two groups of mounting plates are provided, which are movably connected to the corresponding guide grooves; two groups of clamps are provided, and the clamps are fixed to the side wall of the box body on one side of the guide groove; a mounting groove is provided on the rotating roller, and the rotating roller is rotatably connected to the clamp through the mounting groove; the chain plate is connected to the surface of the rotating roller, and the bushing is clamped and connected to the inside of the rotating roller; the transmission shaft is rotatably connected to the mounting plate through a bearing, one end of the transmission shaft is provided with a gear I, and the other end is fixed to the bushing; the motor II is fixed on the mounting plate, and the output shaft of the motor II is provided with a gear II; the gear II is meshed with the gear I, and the motor II and the gear II, as well as the gear I, are provided with protective covers on the outside; a cleaning brush is provided inside the chain plate, and adjacent cleaning brushes are staggered.

[0024] The interior of the rotating roller is hollow, and a clamping groove is provided on the inner side wall of the rotating roller; a clamping plate is provided at one end of the shaft sleeve away from the transmission shaft, and the clamping plate is movably connected to the inside of the clamping groove.

[0025] A cleaning mechanism I is provided at one end of the chain plate, and the cleaning mechanism I is located between the rotating rollers; the cleaning mechanism I includes a fixed plate, a screw, a guide plate, a motor III, a cleaning plate, and an electric push rod III; the fixed plate is fixed to the inner wall of the box body, and is located at the end of the guide groove away from the clamp; the screw is located inside the chain plate, and both ends pass through the rotating roller and the transmission shaft and are rotatably connected to the corresponding fixed plate; the guide plate is located above the screw, and both ends of the guide plate are respectively fixed to the fixed plate; a protective cover is provided on the outside of the screw; the motor III is fixed to the side wall of the fixed plate, and the output shaft is connected to one end of the screw; the cleaning plate passes through the guide plate and is connected to the screw by a thread, the bottom of the cleaning plate is in contact with the inner surface of the chain plate, the electric push rod III is fixed on the fixed plate, and the output end is in contact with the mounting plate.

[0026] The cleaning plate is provided with a connecting plate, cleaning teeth, a spring, and an annular push plate; a movable groove is provided inside the connecting plate, and the connecting plate is connected to the bottom of the cleaning plate through the movable groove; a plurality of springs are provided, and the springs are located inside the movable groove, and the two ends of the springs are respectively connected to the connecting plate and the cleaning plate; a plurality of evenly distributed cleaning teeth are provided at the bottom of the connecting plate; the annular push plate is fixed on the cleaning plate, and the outer diameter of the annular push plate is the same as the inner diameter of the rotating roller.

[0027] The flushing and drying mechanism includes a water inlet pipe and a flushing pipe; the water inlet pipe is fixed on the side wall of the box, and a plurality of flushing pipes are provided, which are evenly connected to the water inlet pipe; two groups of nozzles are provided on the flushing pipe, and the nozzles are inclined toward both sides of the Kovar alloy plate respectively.

[0028] A drying mechanism is provided on one side of the flushing pipe; the drying mechanism includes a drying box, a hot air pipe, a disc, a rack, an electric push rod II, and a strap; the drying box is fixed on the inner wall of the box; the hot air pipe passes through the drying box and is located inside the drying box, and the hot air pipe adopts a hose; the disc is rotatably connected to the side wall of the drying box through a rotating shaft, and a gear III is provided on the rotating shaft of the disc; the rack is movably connected to the outer wall of the box, the rack is meshed with gear III, and a protective cover is provided on the outside of the rack and gear III; the electric push rod II is fixed on the outer wall of the box, and the output end is connected to one end of the rack; the strap is fixed on the disc and connected to the hot air pipe.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1) In cleaning mechanism I, the motor provides power to rotate the lead screw, which drives the cleaning plate to move along the guide plate through the thread. The cleaning plate drives the oxide scale that has fallen on both ends of the chain plate to move to the outside of the chain plate, so that the oxide scale is discharged. When the cleaning plate moves to the side of the rotating roller, the cleaning plate drives the shaft sleeve, drive shaft and mounting plate to move along the guide groove, so that the shaft sleeve is away from the rotating roller. At the same time, the oxide scale is discharged through the gap between the shaft sleeve and the rotating roller, thereby preventing the oxide scale from accumulating on both sides of the chain plate, further preventing the chain plate from getting stuck, and preventing the accumulated oxide scale from scratching the side wall of the Kovar alloy plate.

[0031] 2) The lead screw drives the cleaning plate to move along the guide plate, and the cleaning teeth at the bottom of the cleaning plate clean the oxide scale on both ends of the chain plate; when the cleaning plate moves to the end of the rotating roller, the cleaning teeth move along the inclined side wall of the rotating roller, and the cleaning teeth move upward along the connecting plate, and the spring is compressed; thereby, the cleaning teeth can drive the oxide scale to pass through the rotating roller and be discharged; the spring can ensure that the cleaning teeth are always in contact with the bottom of the chain plate.

[0032] 3) Motor I provides power to drive the bidirectional threaded rod to rotate, and the bidirectional threaded rod drives the upper and lower shielding plates to move through the threads, so as to block the side of the Kovar alloy plate and improve the uniformity of laminar cooling; electric push rod I provides power to drive the telescopic plate to move, so that the telescopic plate is inserted above the laminar flow tube, and then motor IV provides power to drive gear V to rotate, gear V drives gear IV to rotate, gear IV drives the threaded rod to move up and down through the threads, and the threaded rod drives the telescopic plate to move, and the telescopic plate will pull out the oxide belt stuck between the inclined plates, thereby preventing the laminar flow tube below the Kovar alloy plate from being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Attachment Figure 1 This is a schematic diagram of the structure of the interior of a box in a 4J42 Kovar alloy hot-rolled coil and a pickling surface treatment process according to the present invention;

[0034] Attachment Figure 2 This is a schematic structural diagram of a 4J42 Kovar alloy hot-rolled coil and a descaling mechanism in a pickling surface treatment process according to the present invention;

[0035] Attachment Figure 3 It is attached Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0036] Attachment Figure 4 This is a schematic diagram of the structure of a 4J42 Kovar alloy hot-rolled coil and a cleaning mechanism I in a pickling surface treatment process of the present invention. Figure 1 ;

[0037] Attachment Figure 5 It is attached Figure 4 A schematic diagram of the enlarged structure of the middle part B;

[0038] Attachment Figure 6 This is a schematic diagram of the structure of a 4J42 Kovar alloy hot-rolled coil and a cleaning mechanism I in a pickling surface treatment process of the present invention. Figure 2 ;

[0039] Attachment Figure 7 This is a schematic structural diagram of a 4J42 Kovar alloy hot-rolled coil and a cleaning plate in a pickling surface treatment process according to the present invention;

[0040] Attachment Figure 8This is a schematic structural diagram of a 4J42 Kovar alloy hot-rolled coil and a washing and drying mechanism in a pickling surface treatment process according to the present invention;

[0041] Attachment Figure 9 This is a schematic diagram of the structure of the interior of a drying box in a 4J42 Kovar alloy hot-rolled coil and a pickling surface treatment process according to the present invention;

[0042] Attachment Figure 10 This is a schematic structural diagram of a cooling mechanism in a 4J42 Kovar alloy hot-rolled coil and a pickling surface treatment process according to the present invention;

[0043] Attachment Figure 11 This is a structural schematic diagram of a shielding mechanism in a 4J42 Kovar alloy hot-rolled coil and a pickling surface treatment process according to the present invention;

[0044] Attachment Figure 12 This is a schematic diagram of the structure of the cleaning mechanism II in the 4J42 Kovar alloy hot-rolled coil and pickling surface treatment process of the present invention. Figure 1 ;

[0045] Attachment Figure 13 This is a schematic diagram of the structure of the cleaning mechanism II in the 4J42 Kovar alloy hot-rolled coil and pickling surface treatment process of the present invention. Figure 2 ;

[0046] Attachment Figure 14 This is a schematic diagram of the structure of a 4J42 Kovar alloy hot-rolled coil and pickling surface treatment process of the present invention. Figure 1 ;

[0047] Attachment Figure 15 This is a schematic diagram of the structure of a 4J42 Kovar alloy hot-rolled coil and pickling surface treatment process of the present invention. Figure 2 ;

[0048] Figure: 1. Frame; 2. Cooling mechanism; 201. Support frame; 202. Main pipe; 203. Laminar flow pipe; 204. Inclined plate; 205. Connecting rod; 3. Shielding mechanism; 301. Bidirectional threaded rod; 302. Upper shielding plate; 303. Lower shielding plate; 3031. Moving trough; 304. Motor I; 305. Cleaning mechanism II; 3051. Telescopic plate; 3052. Movable plate; 3053. Threaded Rod; 3054, gear IV; 3055, motor IV; 3056, gear V; 3057, electric push rod I; 306, guide rod; 4, box; 401, guide groove; 5, feed port; 6, discharge port; 7, partition; 8, descaling mechanism; 801, chain plate; 8011, cleaning brush; 802, mounting plate; 803, rotating roller; 8031, engaging groove; 804, shaft sleeve; 804 1. Clamping plate; 805. Drive shaft; 8051. Gear I; 806. Motor II; 8061. Gear II; 807. Clamp; 808. Cleaning mechanism I; 8081. Fixing plate; 8082. Screw; 8083. Guide plate; 8084. Motor III; 8085. Cleaning plate; 80851. Connecting plate; 80852. Cleaning tooth; 80853. Spring; 80854. Annular push plate; 8086, electric push rod III; 9, flushing and drying mechanism; 901, water inlet pipe; 902, flushing pipe; 906, drying mechanism; 9061, drying box; 9062, hot air pipe; 9063, disc; 90631, gear III; 9064, rack; 9065, electric push rod II; 9066, bridging plate; 12, transport roller; 14, lower pressure roller; 15, Kovar alloy plate. DETAILED DESCRIPTION

[0049] To facilitate understanding by those skilled in the art, Figure 1-15 , the technical solution of the present invention is further described in detail.

[0050] Example 1;

[0051] A 4J42 Kovar alloy hot-rolled coil and a pickling surface treatment process, wherein the chemical composition of the Kovar alloy plate is as follows by weight: Ni=42%, Co=0.5%, C=0.03%, Mn=0.5%, Si=0.15%, P=0.01%, S=0.01%, and the balance is Fe.

[0052] The process steps are as follows: 1) Material preparation and heating: The Kovar alloy slab is transported to a heating furnace for heating. The temperature of the first heating stage is 938°C; the temperature of the second heating stage is 1073°C; the temperature of the soaking stage is 1175°C; and the heating rate is 1.3 min / mm.

[0053] 2) Rough rolling: The heated Kovar alloy plate is transported to the rough rolling mill through the transport rollers and then subjected to rough rolling;

[0054] 3) Descaling: Descaling the Kovar alloy plate after rough rolling;

[0055] 4) Finish rolling: The descaled Kovar alloy plate is finished by a finishing mill; the finishing rolling has 7 passes: the first pass has a reduction rate of 22%; the second pass has a reduction rate of 24%; the third pass has a reduction rate of 24%; the fourth pass has a reduction rate of 23%; the fifth pass has a reduction rate of 21%; the sixth pass has a reduction rate of 17%; the seventh pass has a reduction rate of 16%;

[0056] 5) Laminar cooling: The laminar cooling device is used to cool the Kovar alloy plate after finishing rolling;

[0057] 6) Coiling: Coil the cooled Kovar alloy plate through a coiler;

[0058] 7) Uncoiling and welding: Uncoiling and welding of Kovar alloy coils;

[0059] 8) Annealing: The Kovar alloy plate is annealed in an annealing furnace at a temperature of 1060°C; then cooled in a cooling device;

[0060] 9) Pickling: Titanium and titanium alloy hot-rolled coils are pickled using a pickling device. The pickling process consists of three sections: sulfuric acid zone, mixed acid zone 1, and mixed acid zone 2. a. The sulfuric acid concentration in the sulfuric acid zone is 88 g / L, the metal ion concentration in the sulfuric acid solution is 20 g / L, and the pickling temperature is 41°C. b. The HNO3 concentration in mixed acid zone 1 is 91.5 g / L, the HF concentration is 43 g / L, the metal ion concentration in the acid solution is 20 g / L, and the acid solution temperature is 55°C. c. Descaling: The chain plates in the descaling mechanism rotate to clean stubborn oxide flakes on the surface of the Kovar alloy plate, improving pickling efficiency. d. The HNO3 concentration in mixed acid zone 2 is 74 g / L, the HF concentration is 29 g / L, the metal ion concentration in the acid solution is 25 g / L, and the acid solution temperature is 45°C.

[0061] 10) Cleaning and drying: The pickled titanium and titanium alloy hot-rolled coils are cleaned and dried in sequence through a cleaning device and a drying device, and the dried titanium and titanium alloy hot-rolled coils are coiled;

[0062] The laminar cooling device in step 5) includes a frame 1, a cooling mechanism 2, and a shielding mechanism 3; the frame 1 is fixed to the ground; a plurality of transport rollers are provided on the frame 1, the cooling mechanism 2 is mounted on the frame 1 and is located on the upper and lower sides of the Kovar alloy plate 15, and the shielding mechanism 3 is mounted on both sides of the Kovar alloy plate 15; the Kovar alloy plate 15 after finish rolling is transported to the cooling mechanism 2 by the transport rollers, and the Kovar alloy plate 15 is cooled by the cooling mechanism 2; the shielding mechanism 3 can shield the side of the Kovar alloy plate 15, thereby improving the uniformity of laminar cooling.

[0063] The cooling mechanism 2 includes a support frame 201, a main pipe 202, a laminar flow pipe 203, and an inclined plate 204; the support frame 201 is fixed on the top of the frame 1, and a pair of main pipes 202 are respectively installed on the support frame 201 above the Kovar alloy plate 15 and the frame 1 below the Kovar alloy plate 15; the laminar flow pipe 203 is connected to the main pipe 202; the inclined plate 204 is installed on the frame 1 below the Kovar alloy plate 15 and is located on both sides of the laminar flow pipe 203; the cooling water enters the laminar flow pipe 203 through the main pipe 202, and flows to the surface of the Kovar alloy plate 15 through the laminar flow pipe 203, thereby cooling the Kovar alloy plate 15; the inclined plate 204 can prevent the oxide scale falling from the lower surface of the Kovar alloy plate 15 from clogging the laminar flow pipe 203 below the Kovar alloy plate 15.

[0064] The shielding mechanism 3 includes a bidirectional threaded rod 301, an upper shield plate 302, a lower shield plate 303, a motor I 304, and a guide rod 306; a convex plate is provided on the frame 1, and the bidirectional threaded rod 301 is rotatably connected to the convex plate through a bearing, and guide rods 306 are provided on both sides of the bidirectional threaded rod 301, and the guide rods 306 are fixed on the convex plate, and a protective cover is provided on the outside of the bidirectional threaded rod 301; the upper shield plate 302 is located above the Kovar alloy plate 15, and a moving block is provided on the upper shield plate 302, which passes through the guide rod 306 and is connected to the bidirectional threaded rod 301 by threading; the lower shield plate 303 is located between the inclined plates 204; the upper shield plate 302 and the lower shield plate 303 are connected by a connecting rod; the motor I 304 provides power to drive the bidirectional threaded rod 301 to rotate, and the bidirectional threaded rod 301 drives the upper shield plate 302 and the lower shield plate 303 to move through the thread, so that the side of the Kovar alloy plate 15 can be shielded to improve the uniformity of laminar cooling.

[0065] The lower shielding plate 303 is provided with a cleaning mechanism II 305, which includes a telescopic plate 3051, a movable plate 3052, a threaded rod 3053, a gear IV 3054, a motor IV 3055, and an electric push rod I 3057; a movable groove 3031 is provided on the lower shielding plate 303, the telescopic plate 3051 is installed in the movable groove 3031, and the movable plate 3052 is overlapped on the inclined plate 204; the gear IV 3054 is rotatably connected to the top of the movable plate 3052, the threaded rod 3053 is threadedly connected to the gear IV 3054, and one end of the threaded rod 3053 is connected to the telescopic plate 3051; the motor IV 3055 is fixed to the top of the movable plate 3052 by a bracket, and a gear V 3056 is provided at the output end; the gear V 3056 is connected to the gear IV 3054 is meshed and connected, and a protective cover is provided on the outside of gear V 3056 and gear IV 3054; the electric push rod I 3057 is fixed on the telescopic plate 3051, and the output end is connected to the moving end of the telescopic plate 3051; the electric push rod I 3057 provides power to drive the telescopic plate 3051 to move, so that the telescopic plate 3051 is inserted above the laminar flow tube, and then the motor IV 3055 provides power to drive gear V 3056 to rotate, gear V 3056 drives gear IV 3054 to rotate, gear IV 3054 drives the threaded rod 3053 to move up and down through the thread, the threaded rod 3053 drives the telescopic plate 3051 to move, and the telescopic plate 3051 pulls out the oxide belt stuck between the inclined plates 204, thereby preventing the laminar flow tube 203 below the Kovar alloy plate 15 from being blocked.

[0066] The pickling device in step 9) includes a box 4, a feed port 5, a discharge port 6, a partition 7, and a descaling mechanism 8; the box 4 is fixed on the ground, and the feed port 5 and the discharge port 6 are respectively located at both ends of the box 4; a plurality of partitions 7 are provided and evenly installed inside the box 4, and the partitions 7 divide the box 4 into a pickling zone I, a descaling zone, a pickling zone II, and a washing and drying zone; the descaling mechanism 8 is installed inside the descaling zone; a plurality of transport rollers 12 are provided, and the transport rollers 12 are rotatably connected to the side walls of the box 4 through bearings; pinch rollers are provided at the feed port 5 and the discharge port 6 at both ends of the box 4, which can facilitate the transportation of the Kovar alloy plate 15; a lower pressure roller 14 is provided inside the pickling zone I and the pickling zone II, which can ensure that the Kovar alloy plate 15 is immersed in the pickling solution and accelerate the pickling efficiency; the Kovar alloy plate 15 enters through the feed port 5, and then passes through the pickling zone I, the descaling zone, the pickling zone II, the washing and drying zone in turn, and is finally transported out through the discharge port 6.

[0067] The descaling mechanism 8 includes a chain plate 801, a mounting plate 802, a rotating roller 803, a sleeve 804, a transmission shaft 805, a motor II 806, and a clamp 807; two sets of guide grooves 401 are provided on the inner wall of the box body 4, and the mounting plate 802 is provided with two sets of guide grooves 401, which are respectively movably connected to the corresponding guide grooves 401; two sets of clamps 807 are provided, and the clamps 807 are fixed to the side wall of the box body 4 on one side of the guide groove 401; a mounting groove is provided on the rotating roller 803, and the rotating roller 803 is rotatably connected to the clamp 807 through the mounting groove; the chain plate 801 is connected to the surface of the rotating roller 803, and the sleeve 804 is engaged and connected to the inside of the rotating roller 803; the transmission shaft 805 is rotatably connected to the mounting plate 802 through a bearing, and one end of the transmission shaft 805 is provided with a gear I 8051, and the other end is fixed to the sleeve 804; Motor II 806 is fixed on the mounting plate 802, and a gear II 8061 is provided on the output shaft of motor II 806; gear II 8061 is meshedly connected with gear I 8051; protective covers are provided on the outside of motor II, gear II and gear I; a cleaning brush 8011 is provided on the inner surface of the chain plate 801, and adjacent cleaning brushes are staggered, which can prevent scratches on the surface of the Kovar alloy plate; motor II 806 provides power to drive gear II 8061 to rotate, gear II 8061 drives the transmission shaft 805 to rotate through gear I 8051, the transmission shaft 805 drives the rotating roller 803 to rotate through the shaft sleeve 804, and the rotating roller 803 drives the chain plate 801 to rotate, and the surface of the Kovar alloy plate 15 is cleaned by the cleaning brush 8011 on the chain plate 801, thereby cleaning the oxide scale adhering to the surface of the Kovar alloy plate 15.

[0068] The interior of the rotating roller 803 is hollow, and a locking groove 8031 ​​is provided on the inner wall of the rotating roller 803; a locking plate 8041 is provided at the end of the sleeve 804 away from the transmission shaft 805, and the locking plate 8041 is movably connected inside the locking groove 8031; when the transmission shaft 805 drives the sleeve 804 to rotate, the sleeve 804 drives the rotating roller 803 to rotate through the locking plate 8041 and the locking groove 8031.

[0069] The chain plate 801 is provided with a cleaning mechanism I808 at one end, and the cleaning mechanism I808 is located between the rotating rollers 803; the cleaning mechanism I808 includes a fixed plate 8081, a screw 8082, a guide plate 8083, a motor III 8084, a cleaning plate 8085, and an electric push rod III 8086; the fixed plate 8081 is fixed to the inner wall of the box body 4 and is located at the end of the guide groove 401 away from the clamp 807; the screw 8082 is located inside the chain plate 801, and The two ends of the guide plate 8083 pass through the rotating roller 803 and the transmission shaft 805 and are rotatably connected to the corresponding fixed plate 8081; the guide plate 8083 is located above the screw 8082, and the two ends of the guide plate 8083 are fixed to the fixed plate 8081 respectively. A protective cover is provided on the outside of the screw 8082; the motor III 8084 is fixed to the side wall of the fixed plate 8081, and the output shaft is connected to one end of the screw 8082; the cleaning plate 8085 passes through the guide plate 8083 and is connected to the screw 8082 through a thread. 82 is connected, and the bottom of the cleaning plate 8085 contacts the inner surface of the chain plate 801; the electric push rod III is fixed on the fixed plate, and the output end contacts the mounting plate; the motor III 8084 provides power to drive the screw 8082 to rotate, and the screw 8082 drives the cleaning plate 8085 to move along the guide plate 8083 through the thread; the cleaning plate 8085 drives the oxide scales that have fallen on both ends of the chain plate 801 to move to the outside of the chain plate 801, so that the oxide scales are discharged; when the cleaning plate 8085 moves to the side of the rotating roller 803, the cleaning plate 8085 drives the shaft sleeve 804, the transmission shaft 805 and the mounting plate 802 to move along the guide groove 401, so that the shaft sleeve 804 is away from the rotating roller 803, and at the same time, the oxide scales are discharged through the gap between the shaft sleeve 804 and the rotating roller 803, thereby preventing the oxide scales from accumulating on both sides of the chain plate 801, further preventing the chain plate 801 from getting stuck, and preventing the accumulated oxide scales from scratching the side wall of the Kovar alloy plate 15.

[0070] The cleaning plate 8085 is provided with a connecting plate 80851, cleaning teeth 80852, a spring 80853, and an annular push plate 80854; a movable groove is provided inside the connecting plate 80851, and the connecting plate 80851 is connected to the bottom of the cleaning plate 8085 through the movable groove; a plurality of springs 80853 are provided, and the springs 80853 are located inside the movable groove, and the two ends of the springs 80853 are respectively connected to the connecting plate 80851 and the cleaning plate 8085; a plurality of evenly distributed cleaning teeth 80852 are provided at the bottom of the connecting plate 80851; the annular push plate 80854 is fixed on the cleaning plate 8085, and the outer diameter of the annular push plate 80854 is 1. The inner diameter is the same as that of the rotating roller 803; the lead screw 8082 drives the cleaning plate 8085 to move along the guide plate 8083, and the cleaning teeth 80852 at the bottom of the cleaning plate 8085 clean the oxide scales at both ends of the chain plate; when the cleaning plate 8085 moves to the end of the rotating roller 803, the cleaning teeth 80852 move along the inclined side wall of the rotating roller 803, and the cleaning teeth 80852 move upward along the connecting plate 80851, and the spring 80853 is compressed; thereby, the oxide scales can be driven by the cleaning teeth 80852 to pass through the rotating roller 803 and be discharged; the spring 80853 can ensure that the cleaning teeth 80852 are always in contact with the bottom of the chain plate 801.

[0071] The flushing and drying mechanism 9 includes a water inlet pipe 901 and a flushing pipe 902; the water inlet pipe 901 is fixed on the side wall of the box body 4, and a number of flushing pipes 902 are provided, which are evenly connected to the water inlet pipe 901; two groups of nozzles are provided on the flushing pipe 902, and the nozzles are inclined toward both sides of the Kovar alloy plate 15 respectively; cleaning water enters through the water inlet pipe 901, and then is sprayed onto the surface of the Kovar alloy plate 15 through the flushing pipe 902, thereby cleaning the acid remaining on the surface of the Kovar alloy plate 15; preventing the residual acid from corroding the Kovar alloy plate 15 and affecting the surface quality of the Kovar alloy plate 15.

[0072] A drying mechanism 906 is provided on one side of the flushing pipe 902; the drying mechanism 906 includes a drying box 9061, a hot air pipe 9062, a disc 9063, a rack 9064, an electric push rod II 9065, and a strap 9066; the drying box 9061 is fixed to the inner wall of the box body 4; the hot air pipe 9062 passes through the drying box 9061 and is located inside the drying box 9061, and the hot air pipe 9062 adopts a hose; the disc 9063 is rotatably connected to the side wall of the drying box 9061 through a rotating shaft, and a gear III 90631 is provided on the rotating shaft of the disc 9063; the rack 9064 is movably connected to the outer wall of the box body 4, and the rack 9064 is meshed with the gear III 90631 , protective covers are provided on the outside of the rack 9064 and the gear III 90631; the electric push rod II 9065 is fixed on the outer wall of the box body 4, and the output end is connected to one end of the rack 9064; the strap 9066 is fixed on the disc 9063 and connected to the hot air pipe 9062; the electric push rod II 9065 provides power to drive the rack 9064 to move, the rack 9064 drives the gear III 90631 to rotate, the gear III 90631 drives the strap 9066 to rotate through the disc 9063, and the strap 9066 drives the hot air pipe 9062 to adjust the angle, thereby adjusting the drying efficiency; the hot air enters the hot air pipe through the connecting pipe and is sprayed onto the surface of the Kovar alloy plate 15 through the hot air pipe.

[0073] Example 2 is different from Example 1 in that:

[0074] 1) Material preparation and heating: The Kovar alloy slab is transported to a heating furnace for heating. The temperature of the first heating stage is 941°C; the temperature of the second heating stage is 1081°C; the temperature of the soaking stage is 1181°C; and the heating rate is 1.4 min / mm.

[0075] 4) Finish rolling: The descaled Kovar alloy plate is finished by a finishing mill; the finishing rolling has 7 passes: the first pass has a reduction rate of 23%; the second pass has a reduction rate of 25%; the third pass has a reduction rate of 24.5%; the fourth pass has a reduction rate of 24%; the fifth pass has a reduction rate of 22%; the sixth pass has a reduction rate of 17.5%; the seventh pass has a reduction rate of 15%.

[0076] 8) Annealing: The Kovar alloy plate is annealed in an annealing furnace at a temperature of 1066°C; then cooled in a cooling device;

[0077] 9) Pickling: Titanium and titanium alloy hot-rolled coils are pickled using a pickling device. The pickling process consists of three sections: a sulfuric acid zone, a mixed acid zone 1, and a mixed acid zone 2. a. The concentration of sulfuric acid in the sulfuric acid zone is 95 g / L, the metal ion concentration in the sulfuric acid solution is 37 g / L, and the pickling temperature is 44°C. b. The concentration of HNO3 in the mixed acid zone 1 is 96 g / L, the concentration of HF is 47 g / L, the metal ion concentration in the acid solution is 35 g / L, and the acid solution temperature is 59°C. d. The concentration of HNO3 in the mixed acid zone 2 is 77 g / L, the concentration of HF is 35.5 g / L, the metal ion concentration in the acid solution is 31 g / L, and the acid solution temperature is 50°C.

[0078] Example 3 is different from Example 1 in that:

[0079] 1) Material preparation and heating: The Kovar alloy slab is transported to a heating furnace for heating. The temperature of the first heating stage is 947°C; the temperature of the second heating stage is 1090°C; the temperature of the soaking stage is 1091°C; and the heating rate is 1.5 min / mm.

[0080] 4) Finish rolling: The descaled Kovar alloy plate is finished by a finishing mill; the finishing rolling has 7 passes: the first pass has a reduction rate of 23%; the second pass has a reduction rate of 26%; the third pass has a reduction rate of 25.5%; the fourth pass has a reduction rate of 24%; the fifth pass has a reduction rate of 23%; the sixth pass has a reduction rate of 18%; the seventh pass has a reduction rate of 16%;

[0081] 8) Annealing: The Kovar alloy plate is annealed in an annealing furnace at a temperature of 1071°C; then cooled in a cooling device;

[0082] 9) Pickling: Titanium and titanium alloy hot-rolled coils are pickled using a pickling device. The pickling process consists of three sections: a sulfuric acid zone, a mixed acid zone 1, and a mixed acid zone 2. a. The concentration of sulfuric acid in the sulfuric acid zone is 109 g / L, the metal ion concentration in the sulfuric acid solution is 48 g / L, and the pickling temperature is 49°C. b. The concentration of HNO3 in the mixed acid zone 1 is 105 g / L, the concentration of HF is 49 g / L, the metal ion concentration in the acid solution is 43 g / L, and the acid solution temperature is 61°C. d. The concentration of HNO3 in the mixed acid zone 2 is 81 g / L, the concentration of HF is 39 g / L, the metal ion concentration in the acid solution is 38 g / L, and the acid solution temperature is 52°C.

[0083] Comparative Example: The plate was rolled using any of the hot rolling processes in Examples 1-3, and then produced using a production method for 4J42 Invar alloy hot continuous rolling strip with patent application publication number CN119327867A;

[0084] The mechanical properties of the above examples were tested according to GB / T 15018-1994, and the test results are shown in the following table;

[0085] Tensile strength Mpa Yield strength MPa Elongation% in conclusion Example 1 593 246 37.6 qualified Example 2 605 255 41 qualified Example 3 627 267 45 qualified Comparative Example 572 241 36 qualified

[0086] According to the above standards, the appearance quality inspection of the board and the results are as follows:

[0087] Surface inspection results of Example 1, Example 2, and Example 3: The surface of the plate is clean, without obvious scratches, indentations, pits and other defects; at the same time, the surface quality of the rolled Kovar alloy plate is good, the plate shape is square, and the edges are neat without curling.

[0088] Surface inspection results of Comparative Example 1: There are no obvious defects on the board surface; there are some dark spots on the surface.

[0089] According to the above conclusions, the mechanical properties of the test results of the above-mentioned embodiments and comparative examples all meet the test standards; however, the surface quality of the plates in Examples 1-3 is the best.

[0090] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A 4J42 Kovar alloy hot rolled coil and pickling surface treatment process, characterized in that The chemical composition of the Kovar alloy plate is as follows by weight: 40%≤Ni≤43%, Co≤1.0%, C≤0.05%, Mn≤0.8%, Si≤0.3%, P≤0.02%; S≤0.02%, and the balance is Fe element; The process steps are as follows: 1) Material preparation and heating: The Kovar alloy slab is transported to a heating furnace for heating. The temperature of the first heating stage is 940±8°C; the temperature of the second heating stage is 1080±12°C; the temperature of the soaking stage is 1180±12°C; and the heating rate is 1.2-1.5 min / mm. 2) Rough rolling: The heated Kovar alloy plate is transported to the rough rolling mill through the transport rollers and then subjected to rough rolling; 3) Descaling: Descaling the Kovar alloy plate after rough rolling; 4) Finish rolling: The descaled Kovar alloy plate is finished rolled in a finishing mill; the finishing rolling has 7 passes: the first pass has a reduction rate of 21-23%; the second pass has a reduction rate of 24-26%; the third pass has a reduction rate of 24-26%; the fourth pass has a reduction rate of 23-25%; the fifth pass has a reduction rate of 20-23%; the sixth pass has a reduction rate of 16-18%; the seventh pass has a reduction rate of 14-16%; 5) Laminar cooling: The laminar cooling device is used to cool the Kovar alloy plate after finishing rolling; 6) Coiling: The cooled Kovar alloy plate is coiled by a coiler and transported to the pickling line; 7) Uncoiling and welding: Uncoiling and welding of Kovar alloy coils; 8) Annealing: The Kovar alloy plate is annealed in an annealing furnace at a temperature of 1063°C ± 15°C; then cooled in a cooling device; 9) Pickling: Titanium and titanium alloy hot-rolled coils are pickled by pickling equipment. The pickling process has three sections, namely sulfuric acid zone, mixed acid zone 1, and mixed acid zone 2. a. The concentration of sulfuric acid in the sulfuric acid zone is 78g / L-113g / L, the concentration of metal ions in the sulfuric acid solution is 1.5-51.5g / L, and the pickling temperature is 39℃-51℃; b. The concentration of HNO3 in the mixed acid zone is 85.5g / L-107g / L, and the concentration of HF is 31g / L-51.5 g / L, the metal ion concentration in the acid solution is 1-43g / L, and the acid solution temperature is 53℃-66℃; c. Descaling: The chain plate in the descaling mechanism rotates to clean the stubborn oxide flakes on the surface of the Kovar alloy plate, thereby improving the pickling efficiency; d. The HNO3 concentration in the second mixed acid zone is 70.5g / L-84.5g / L, the HF concentration is 21g / L-39g / L, the metal ion concentration in the acid solution is 0-39g / L, and the acid solution temperature is 37℃-53℃; 10) Cleaning and drying: The pickled titanium and titanium alloy hot-rolled coils are cleaned and dried in sequence through a cleaning device and a drying device, and the dried titanium and titanium alloy hot-rolled coils are coiled.

2. A 4J42 Kovar alloy hot rolled coil and pickling surface treatment process according to claim 1, characterized in that The 7 passes of finishing rolling are as follows: the reduction rate of the first pass is 22%; the reduction rate of the second pass is 24%; the reduction rate of the third pass is 24%; the reduction rate of the fourth pass is 23%; the reduction rate of the fifth pass is 21%; the reduction rate of the sixth pass is 17%; and the reduction rate of the seventh pass is 16%.

3. A 4J42 Kovar alloy hot rolled coil and pickling surface treatment process according to claim 1, characterized in that The laminar cooling device in step 5) includes a frame, a cooling mechanism, and a shielding mechanism; the frame is fixed to the ground; a plurality of transport rollers are provided on the frame; the cooling mechanism is mounted on the frame and is located above and below the Kovar plate; and the shielding mechanism is mounted on both sides of the Kovar plate; the cooling mechanism includes a support frame, a main pipe, a laminar flow pipe, and an inclined plate; the support frame is fixed to the top of the frame; a pair of main pipes are provided, one mounted on the support frame above the Kovar plate and the other on the frame below the Kovar plate; the laminar flow pipe is connected to the main pipe; and the inclined plate is mounted on the frame below the Kovar plate and is located on both sides of the laminar flow pipe; The pickling device in step 9) includes a box, a feed port, a discharge port, a partition, and a descaling mechanism; the box is fixed to the ground, with the feed port and the discharge port located at both ends of the box; a plurality of partitions are provided and evenly installed inside the box, and the partitions divide the box into a pickling zone I, a descaling zone, a pickling zone II, and a washing and drying zone; the descaling mechanism is installed inside the descaling zone; a plurality of transport rollers are provided, and the transport rollers are rotatably connected to the side walls of the box via bearings; pinch rollers are provided at the feed port and the discharge port at both ends of the box; and lower pressure rollers are provided inside the pickling zone I and the pickling zone II. The descaling mechanism includes a chain plate, a mounting plate, a rotating roller, a bushing, a transmission shaft, a motor II, and a clamp; two sets of guide grooves are provided on the inner wall of the box body, and two sets of mounting plates are movably connected to the corresponding guide grooves; two sets of clamps are provided, and the clamps are fixed to the side wall of the box body on one side of the guide groove; a mounting groove is provided on the rotating roller, and the rotating roller is rotatably connected to the clamp through the mounting groove; the chain plate is connected to the surface of the rotating roller, and the bushing is clamped and connected to the inside of the rotating roller; the transmission shaft is rotatably connected to the mounting plate through a bearing, and one end of the transmission shaft is provided with a gear I, and the other end is fixed to the bushing; the motor II is fixed to the mounting plate, and the output shaft of the motor II is provided with a gear II; the gear II is meshed with the gear I, and protective covers are provided on the outside of the motor II, gear II, and gear I; a cleaning brush is provided inside the chain plate, and adjacent cleaning brushes are staggered. The flushing and drying mechanism includes a water inlet pipe and a flushing pipe; the water inlet pipe is fixed on the side wall of the box, and a number of flushing pipes are provided, which are evenly connected to the water inlet pipe; two groups of nozzles are provided on the flushing pipe, and the nozzles are inclined to both sides of the Kovar alloy plate.

4. A 4J42 Kovar alloy hot-rolled coil and pickling surface treatment process according to claim 3, characterized in that The shielding mechanism includes a bidirectional threaded rod, an upper shield plate, a lower shield plate, a motor I, and a guide rod; a convex plate is provided on the frame, the bidirectional threaded rod is rotatably connected to the convex plate through a bearing, guide rods are provided on both sides of the bidirectional threaded rod, the guide rods are fixed on the convex plate, and a protective cover is provided on the outside of the bidirectional threaded rod; the upper shield plate is located above the Kovar alloy plate, and a movable block is provided on the upper shield plate, which passes through the guide rod and is connected to the bidirectional threaded rod by a thread; the lower shield plate is located between the inclined plates; the upper shield plate and the lower shield plate are connected by a connecting rod.

5. A 4J42 Kovar alloy hot rolled coil and pickling surface treatment process according to claim 4, characterized in that A cleaning mechanism II is provided on the lower shield plate, and the cleaning mechanism II includes a telescopic plate, a movable plate, a threaded rod, a gear IV, a motor IV, and an electric push rod I; a movable groove is provided on the lower shield plate, the telescopic plate is installed in the movable groove, and the movable plate is overlapped on the inclined plate; gear IV is rotatably connected to the top of the movable plate, the threaded rod is connected to gear IV through a thread, and one end of the threaded rod is connected to the telescopic plate; motor IV is fixed to the top of the movable plate through a bracket, and a gear V is provided at the output end; gear V is meshed with gear IV, and protective covers are provided on the outside of gear V and gear IV; electric push rod I is fixed on the telescopic plate, and the output end is connected to the movable end of the telescopic plate.

6. A 4J42 Kovar alloy hot-rolled coil and pickling surface treatment process according to claim 3, characterized in that The interior of the rotating roller is hollow, and a clamping groove is provided on the inner wall of the rotating roller; a clamping plate is provided at one end of the shaft sleeve away from the transmission shaft, and the clamping plate is movably connected to the inside of the clamping groove.

7. A 4J42 Kovar alloy hot rolled coil and pickling surface treatment process according to claim 3, characterized in that A cleaning mechanism I is provided at one end of the chain plate, and the cleaning mechanism I is located between the rotating rollers; the cleaning mechanism I includes a fixed plate, a screw, a guide plate, a motor III, a cleaning plate, and an electric push rod III; the fixed plate is fixed to the inner wall of the box body, and is located at the end of the guide groove away from the clamp; the screw is located inside the chain plate, and both ends pass through the rotating roller and the transmission shaft and are rotatably connected to the corresponding fixed plate; the guide plate is located above the screw, and both ends of the guide plate are respectively fixed to the fixed plate, and a protective cover is provided on the outside of the screw; the motor III is fixed to the side wall of the fixed plate, and the output shaft is connected to one end of the screw; the cleaning plate passes through the guide plate and is connected to the screw by a thread, the bottom of the cleaning plate is in contact with the inner surface of the chain plate, the electric push rod III is fixed on the fixed plate, and the output end is in contact with the mounting plate.

8. A 4J42 Kovar alloy hot rolled coil and pickling surface treatment process according to claim 7, characterized in that The cleaning plate is provided with a connecting plate, cleaning teeth, a spring, and an annular push plate; a movable groove is provided inside the connecting plate, and the connecting plate is connected to the bottom of the cleaning plate through the movable groove; there are several springs, the springs are located inside the movable groove, and the two ends of the springs are respectively connected to the connecting plate and the cleaning plate; a number of evenly distributed cleaning teeth are provided at the bottom of the connecting plate; the annular push plate is fixed on the cleaning plate, and the outer diameter of the annular push plate is the same as the inner diameter of the rotating roller.

9. A 4J42 Kovar alloy hot rolled coil and pickling surface treatment process according to claim 3, characterized in that A drying mechanism is provided on one side of the flushing pipe; the drying mechanism includes a drying box, a hot air pipe, a disc, a rack, an electric push rod II, and a strap; the drying box is fixed on the inner wall of the box; the hot air pipe passes through the drying box and is located inside the drying box, and the hot air pipe adopts a hose; the disc is rotatably connected to the side wall of the drying box through a rotating shaft, and a gear III is provided on the rotating shaft of the disc; the rack is movably connected to the outer wall of the box, the rack is meshed with gear III, and a protective cover is provided on the outside of the rack and gear III; the electric push rod II is fixed on the outer wall of the box, and the output end is connected to one end of the rack; the strap is fixed on the disc and connected to the hot air pipe.

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