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A preparation method of cr5 type forged steel work roll for rolling extremely thin material

A work roll and forged steel technology, applied in the field of Cr5 forged steel work roll and its preparation, can solve the problems of reducing the toughness of the roll, achieve the effects of promoting movement, uniform distribution of nitrogen gas, and improving cryogenic quality

Active Publication Date: 2020-11-03
JIANGSU RUNFU MECHANICAL ROLL MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical composition chromium content can improve the mechanical properties and wear resistance of steel, increase the hardness, elasticity, corrosion resistance and heat resistance of steel, and improve the hardenability of the surface; but at the same time, its disadvantage is that it reduces the toughness of the roll

Method used

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  • A preparation method of cr5 type forged steel work roll for rolling extremely thin material
  • A preparation method of cr5 type forged steel work roll for rolling extremely thin material
  • A preparation method of cr5 type forged steel work roll for rolling extremely thin material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] According to the weight ratio, carbon: 0.6wt%, silicon: 1.2wt%, manganese: 0.2wt%, phosphorus: 0.03wt%, sulfur: 0.02wt%, chromium: 5.5wt%, molybdenum: 0.3wt%, vanadium: 0.05wt% %, the balance is iron and other impurities, the residual copper content is not more than 0.2%, and other impurities such as lead, tin, arsenic, bismuth, etc. are not more than 0.02%, ready for casting materials.

[0041] Melting the alloy solution: according to the above weight ratio, put each component into an intermediate frequency induction furnace for melting, the melting temperature is 1600°C, and the melting time is 30 minutes to make an alloy solution.

[0042] Detection: Spectroscopic analysis is used to detect the smelted alloy liquid to ensure that its composition is within the range.

[0043] Casting cold billet: open the pour hole of the power frequency holding furnace, pour the alloy liquid into the metal mold, and remove the metal mold after it is completely cooled.

[0044] Washi...

Embodiment 2

[0055] According to weight ratio, carbon: 1wt%, silicon: 0.5wt%, manganese: 0.5wt%, phosphorus: 0.02wt%, sulfur: 0.015wt%, chromium: 6.5wt%, molybdenum: 0.7wt%, vanadium: 0.25wt% , the balance is iron and other impurities, the residual copper content is not more than 0.2%, and other impurities such as lead, tin, arsenic, bismuth, etc. are not more than 0.02%, ready for casting materials.

[0056] Melting the alloy solution: according to the above weight ratio, put each component into an intermediate frequency induction furnace for melting, the melting temperature is 1800°C, and the melting time is 40 minutes to make an alloy solution.

[0057] Detection: Spectroscopic analysis is used to detect the smelted alloy liquid to ensure that its composition is within the range.

[0058] Casting cold billet: open the pour hole of the power frequency holding furnace, pour the alloy liquid into the metal mold, and remove the metal mold after it is completely cooled.

[0059] Washing and...

Embodiment 3

[0069] According to the weight ratio, carbon: 0.8wt%, silicon: 1.05wt%, manganese: 0.25wt%, phosphorus: 0.03wt%, sulfur: 0.02wt%, chromium: 5.7wt%, molybdenum: 0.4wt%, vanadium: 0.1wt% %, the balance is iron and other impurities, the residual copper content is not more than 0.2%, and other impurities such as lead, tin, arsenic, bismuth, etc. are not more than 0.02%, ready for casting materials.

[0070] Melting the alloy solution: according to the above weight ratio, put each component into an intermediate frequency induction furnace for melting, the melting temperature is 1800°C, and the melting time is 40 minutes to make an alloy solution.

[0071] Detection: Spectroscopic analysis is used to detect the smelted alloy liquid to ensure that its composition is within the range.

[0072] Casting cold billet: open the pour hole of the power frequency holding furnace, pour the alloy liquid into the metal mold, and remove the metal mold after it is completely cooled.

[0073] Wash...

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Abstract

The invention discloses a preparation method of a Cr5 type forging steel working roller for rolling extremely thin materials. According to the preparation method, after quenching is carried out, a roller is placed into a cryogenic treatment device for treatment at -190 DEG C to -195 DEG C, and corollary equipment is used; and nitrogen deposited at the bottom is blown back to a cryogenic box through a precipitation pipe and a blowing device, the use of liquid nitrogen is reduced, and meanwhile, the movement of gas in the cryogenic box is promoted. By arranging a shielding cover, nitrogen is further channeled while direct injection of liquid nitrogen is prevented, so that the nitrogen is dispersed more evenly. In addition, an air inlet cylinder is driven by a driving device to rotate, the nitrogen is led to the roller through the air inlet cylinder, the roller is further enabled to be cooled evenly, and the quality of cryogenic cooling is improved; meanwhile, an impeller is arranged on the outer wall of the air inlet cylinder, the impeller is rotated by the driving force of the air inlet cylinder to promote the movement of the gas in the cryogenic box, so that the gas is distributedmore evenly; and no extra power is required, and the cost is reduced.

Description

technical field [0001] The invention relates to a roll and a preparation method thereof, in particular to a Cr5 type forged steel work roll for rolling extremely thin materials and a preparation method thereof. Background technique [0002] At present, many occasions need to use high-precision ultra-thin materials, such as aluminum foil with a thickness of 0.01mm ~ 0.1mm, etc. The production process requires high technology and equipment, and the work rolls need to reach extremely high hardness values. Uniformity and strength can be rolled out of extremely thin aluminum foil. The determination of the material of the roll is determined by its working conditions. Because the surface of the cold-rolled work roll is subjected to a high working load during work, the material of the roll must have high strength. At the same time, the work roll is in contact with the rolled material and There is mutual friction between the backup rolls, so the material of the work rolls must have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C21D1/25C21D8/00C21D6/04C21D1/26
CPCC21D1/25C21D1/26C21D6/04C21D8/005C22C38/002C22C38/02C22C38/04C22C38/22C22C38/24
Inventor 蔡友根
Owner JIANGSU RUNFU MECHANICAL ROLL MFG
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