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Roll processing method suitable for improving forging penetration and shortening heat treatment period

A processing method and roll technology, applied in the field of roll processing, can solve the problems of unbalanced roll structure, high proportion of production cost, high surface hydrogen content, etc., and achieve the effect of low carbide level, shortened heat treatment cycle, and uniform internal and external structure

Active Publication Date: 2020-03-31
常州常超模具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If factors such as production downtime, production reduction and equipment maintenance increase due to roll consumption are considered, the proportion of production costs will be higher
[0003] The problems existing in the rolls currently on the market are that during the production process of the rolls, the hydrogen content in the surface layer is high, the inclusions are high, prone to damage, and the internal structure of the rolls is unbalanced, resulting in low quality and short service life of the entire roll.

Method used

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Examples

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Embodiment Construction

[0038] The present invention will be further described in conjunction with specific embodiment now.

[0039] A roll processing method suitable for improving forgeability and shortening the heat treatment cycle, which sequentially includes selecting steel ingots and blanking → forging the steel ingots to form a roll blank → heat treatment and normalizing the roll blanks → rough turning of the roll blanks → semi-finishing of the roll blanks processing.

[0040] Specifically, the forging process of the steel ingot includes: performing three times of upsetting and elongating the steel ingot to obtain a cold-rolled billet. After the first upsetting, the obtained billet is charged into the furnace for the second annealing and hydrogen expansion treatment.

[0041] The three-pier and three-pull process is used to increase the amount of deformation and refine the structure, which can improve the quality defects such as internal porosity and shrinkage cavity of the product to the grea...

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PUM

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Abstract

The invention relates to a roll processing method suitable for improving forging penetration and shortening a heat treatment period. The method successively comprises the steps of selecting a steel ingot for blanking; forging the steel ingot to form a roll blank; carrying out heat treatment normalizing on the roll blank; roughly turning the roll blank; and carrying out semifinishing on the roll blank. A forging method and a heat treatment method in a production process are improved so that a manufactured roller is good in outer surface quality, low in inclusion content, fine in spheroidized organization grain and low in carbide level, a hardness after heat treatment is lower than a standard requirement, a user requirement is satisfied, about 40% of furnace hour is saved, energy consumptionis reduced, and cost is saved.

Description

technical field [0001] The invention relates to a roll processing method suitable for improving forgeability and shortening heat treatment cycle. Background technique [0002] The roll is known as the "mother of steel". It is a tool for plastically deforming metal materials in the rolling production of steel, aluminum, copper and other metals. The consumption cost of the indispensable key parts and the most important mass consumption parts of rolling is about 5% to 15% of the production cost of steel rolling. If factors such as production downtime, reduced production and increased equipment maintenance due to roll consumption are considered, the proportion of production costs will be even higher. [0003] The problems existing in the rolls currently on the market are that during the production process of the rolls, the hydrogen content of the surface layer is high, the inclusions are high, prone to damage, and the internal structure of the rolls is unbalanced, resulting in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/02B21J5/08B21J5/06C22C38/02C22C38/04C22C38/44C22C38/46C22C38/06C21D1/18C21D1/28
CPCB21J5/06B21J5/08B21K1/02C21D1/18C21D1/28C22C38/005C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46
Inventor 刁海美
Owner 常州常超模具有限公司
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