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High-precision wear-resistant special-shaped shear blade and manufacturing method thereof

A manufacturing method and high-precision technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as the inability to guarantee the strength of the device, and achieve the effect of ensuring strength, good smoothness, and convenient use

Pending Publication Date: 2021-09-24
马鞍山市旭隆冶金机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-precision wear-resistant special-shaped shear blade and its manufacturing method, which has the advantages of a convenient processing device and can ensure the strength of the device, and solves the problem that the strength of the device cannot be guaranteed

Method used

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  • High-precision wear-resistant special-shaped shear blade and manufacturing method thereof
  • High-precision wear-resistant special-shaped shear blade and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: 1 Cut the raw material into a regular shape to make a blank. The ratio of materials used in the blank is: C: 5.55-6.52%; Mn: 0.15-0.40%; Si: 0.50-0.80%; S: 0.020-0.030%; P: 0.02-0.03%; Cr: 6.65-6.95%; Ni: 0.03-0.30%; V: 1.68-2.23%; Mo: 4.53-5.56%; Zr,: 0.01-0.02%; B: 0.027~0.038%, the rest is Fe;

[0037] 2) The molten salt liquid is used as the heating medium, and the industrial furnace is heated by immersing the workpiece in the salt liquid;

[0038] 3) Put the forged blank in step 1 into the annealing furnace and raise the temperature to 300°C at a heating rate of 5°C / min. After holding for 30 minutes, continue to heat up to 500°C at a heating rate of 8°C / min and hold for 18 minutes Then continue to heat up to 700°C with a heating rate of 10°C / min, heat it up to 890°C and keep it warm for 260 minutes, then cool it to 400°C in the annealing furnace;

[0039] 4) Heating the cooling substance again, the heating temperature reaches 540°C for 4 to 8 hours,...

Embodiment 2

[0041]Embodiment 2: 1) Cut the raw materials into regular shapes to manufacture blanks. The ratio of materials used in the blanks is: C: 5.55-6.52%; Mn: 0.15-0.40%; Si: 0.50-0.80%; S: 0.020-0.030% ; P: 0.02~0.03%; Cr: 6.65~6.95%; Ni: 0.03~0.30%; ;B: 0.027~0.038%, the rest is Fe;

[0042] 2) The molten salt liquid is used as the heating medium, and the industrial furnace is heated by immersing the workpiece in the salt liquid;

[0043] 3) Put the forged blank in step 1 into the annealing furnace and raise the temperature to 300°C at a heating rate of 5°C / min. After holding for 31 minutes, continue to heat up to 550°C at a heating rate of 8°C / min and hold for 19 minutes Then continue to heat up to 780°C, the temperature rise rate is 10°C / min, heat up to 890°C and keep it warm for 260 minutes, and cool it to 480°C in the annealing furnace;

[0044] 4) Heating the cooling substance again, the heating temperature reaches 560°C for 4 to 8 hours, and then puts into industrial sodiu...

Embodiment 3

[0046] Embodiment 3: 1) Cut the raw material into a regular shape to make a blank. The material ratio of the blank is: C: 5.55-6.52%; Mn: 0.15-0.40%; Si: 0.50-0.80%; S: 0.020-0.030% ; P: 0.02~0.03%; Cr: 6.65~6.95%; Ni: 0.03~0.30%; ;B: 0.027~0.038%, the rest is Fe;

[0047] 2) The molten salt liquid is used as the heating medium, and the industrial furnace is heated by immersing the workpiece in the salt liquid;

[0048] 3) Put the forged blank in step 1 into the annealing furnace and raise the temperature to 300°C at a heating rate of 5°C / min. After holding for 32 minutes, continue to heat up to 560°C at a heating rate of 8°C / min and hold for 19 minutes Then continue to heat up to 800°C, the heating rate is 10°C / min, heat up to 890°C and keep it warm for 260 minutes, and cool down to 500°C in the annealing furnace;

[0049] 4) Heating the cooling substance again, the heating temperature reaches 560°C for 4 to 8 hours, and then puts into industrial sodium nitrite;

[0050] 5...

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Abstract

The invention relates to a high-precision wear-resistant special-shaped shear blade and a manufacturing method thereof. The high-precision wear-resistant special-shaped shear blade comprises an upper cutter and a lower cutter, a radian groove is formed in a cutting edge of the upper cutter, connecting inserting grooves are formed in the bottom and the side edge of the lower cutter, the bottom of the lower cutter is a smooth plane, a device is subjected to heating, quenching, tempering and polishing treatment, rough polishing is conducted at the speed of 800 r / min during polishing, and finally, accurate polishing is conducted at the speed of 1000 r / min, raw materials are cut into regular shapes, a blank is manufactured, the forged blank in the first step is loaded into an annealing furnace and heated to 300 DEG C, and the heating rate is 5 DEG C / min. According to the high-precision wear-resistant special-shaped shear blade and the manufacturing method thereof, through annealing, quenching and tempering treatment, the hardness of the device can be more uniform, the strength of the device can be guaranteed, the service life of the device can be prolonged, the device is polished twice, the smoothness of the device can be good through polishing, and scratches generated in the machining and working process are reduced.

Description

technical field [0001] The invention relates to the technical field of wear-resistant special-shaped shears, in particular to a high-precision wear-resistant special-shaped shears and a manufacturing method thereof. Background technique [0002] At present, the typical cold-rolling process route dominated by my country's iron and steel industry is: converter smelting-external refining-finishing-slab opening-hot continuous rolling-pickling-cold rolling-annealing-tempering-galvanizing-finished products. In this typical cold rolling process, strip welding equipment is essential. During operation, the preceding and following strips must be welded to ensure continuous operation of the production line. [0003] With the development of science and technology and the improvement of people's living standards, people have higher requirements for the stability of special-shaped cutting blades. The previous cutting blades, such as a jaw crusher cutting blade and its manufacture proposed...

Claims

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Application Information

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IPC IPC(8): C21D9/22C22C38/56C22C38/04C22C38/02C22C38/46C22C38/44C22C38/50C22C38/54C21D1/26C21D1/18C21D6/00B02C1/10
CPCC21D9/22C22C38/56C22C38/04C22C38/02C22C38/46C22C38/44C22C38/50C22C38/54C21D1/26C21D1/18C21D6/004C21D6/005C21D6/008B02C1/10C21D2261/00
Inventor 周敏邰正楷陈金旺陶当当
Owner 马鞍山市旭隆冶金机械有限公司
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