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Cold roll bulk heat treatment process

A technology of integral heat treatment and cold rolling, applied in the field of cold rolling rolls, can solve the problems of insufficient uniformity of roll body hardness and short service life, and achieve the effects of good plasticity, increased service life and good medium temperature performance

Inactive Publication Date: 2018-06-01
CHANGZHOU ECCO ROLLER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The uniformity of hardness of the produced roll body is not enough, the hardness value is generally 85HS, and the service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of integral heat treatment process of cold rolling roll, comprises the steps:

[0030] (1) Select the steel ingot raw material of 60CrMnMo;

[0031] (2) Use the loading machine to put the steel ingot raw material on the operation platform to cut the outer surface;

[0032] (3) Forging the raw steel ingot on the operating table into a roll blank with a roll body diameter of 500-600mm and a roll body length of 2500-3000mm;

[0033] (4) Process a roll neck with a diameter of 50-60mm and a length of 30-50mm at the center of both ends of the roll blank;

[0034] (5) Put the billet into the furnace for normalizing annealing. During the spheroidizing annealing process, after heat preservation at about 790 ° C, the carbides in the fine flaky pearlite are easily fused from the middle and distributed in the uneven In the austenite, a large number of diffusely distributed carbide points are formed: after slow cooling, the austenite continues to precipitate carbides, and t...

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PUM

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Abstract

The invention discloses a cold roll bulk heat treatment process. A roll is subjected to normalizing, annealing, quenching and tempering, medium-frequency hardening and cold treatment, the hardness, toughness and impact resistance of a final structure meet the operation requirements, and the service life of the roll is greatly prolonged. A batch-type furnace and a well type electric furnace are used for heating, an overall rapid heating and hardening method is adopted, and the hardening quality of 60CrMnMo steel cold roll can still be ensured.

Description

technical field [0001] The invention belongs to the technical field of cold rolls, and in particular relates to an overall heat treatment process for cold rolls. Background technique [0002] With the rapid development of my country's national economy, the domestic demand for high-precision aluminum strips continues to increase, and it is not yet fully self-sufficient. High-precision aluminum strips and foils are the main varieties imported by my country, accounting for about 85% of the total aluminum imports. about. Most of the work rolls of the existing high-precision aluminum plate cold rolling mills in my country are made of commonly used alloy steel or high-speed steel through heat treatment processes such as quenching and tempering. The uniformity of the hardness of the produced roll body is not enough, the hardness value is generally 85HS, and the service life is short. . Contents of the invention [0003] Aiming at the current situation, the present invention p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/38C21D1/28C21D1/26C21D1/18C21D1/10C21D6/04
CPCC21D1/10C21D1/18C21D1/26C21D1/28C21D6/04C21D9/38Y02P10/25
Inventor 李亚敏
Owner CHANGZHOU ECCO ROLLER
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