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Improved heat treatment method for full-hardening working roll made of M42 material

A heat treatment method and full hardening technology, applied in the field of heat treatment, can solve the problem that the overall hardness of full hardening work rolls needs to be further improved, and achieve the effects of improving toughness, wear resistance and wear resistance.

Pending Publication Date: 2022-07-22
WUXI YIBAO MACHINERY EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides an improved heat treatment method for fully hardened work rolls of M42 material, which overcomes the deficiencies of the prior art, and has a reasonable process design, and solves the problem of the existing fully hardened work rolls of M42 material. The overall hardness needs to be further improved technical problems

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  • Improved heat treatment method for full-hardening working roll made of M42 material

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Embodiment Construction

[0019] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention. examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] An improved heat treatment method for fully hardened work rolls made of M42 material, comprising the following steps of quenching, low temperature tempering and high temperature tempering.

[0021] Quenching:

[0022] S1, a constant temperature preheating, the temperature is 380 ~ 420 ℃, and the holding time is 5 ~ 7 hours;

[0023] S2. The temperature of the s...

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Abstract

The invention relates to the technical field of heat treatment, and provides an improved heat treatment method for a full-hardening working roller made of an M42 material, which is characterized in that quenching comprises high-temperature heating and cryogenic quenching which are sequentially performed; the temperature of high-temperature heating is 1190-1195 DEG C, and the heat preservation time is 1-2 hours; the deep cooling quenching is carried out for 100-120 minutes at the temperature of-50 to-60 DEG C; the temperature ranges from-140 DEG C to-150 DEG C, and the time ranges from The temperature is 190 DEG C below zero to 195 DEG C below zero, and the According to the invention, the defects in the prior art are overcome, the process design is reasonable, and the technical problem that the overall hardness of the existing M42 full-hardened working roll needs to be further improved is solved.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to an improved heat treatment method for fully hardened work rolls made of M42 material. Background technique [0002] With the increasingly high quality requirements of stainless steel strips and copper strips, rolled at room temperature, cold-rolled products have the characteristics of high dimensional accuracy, good surface finish, and adjustable surface roughness. Because of this, cold rolling production has very high requirements on rolls, requiring high hardness, excellent wear resistance, and good toughness. Especially in the production process of stainless steel cold rolling, the requirements for rolls (especially work rolls) are higher. Compared with carbon steel, stainless steel has higher deformation resistance (up to almost double that of carbon steel). The unit rolling pressure of the inner roll is very high, which requires the roll to have high hardness and ben...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D6/04C21D11/00C21D9/38
CPCC21D1/18C21D6/04C21D11/00C21D9/38
Inventor 吴欣梅
Owner WUXI YIBAO MACHINERY EQUIP CO LTD