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Manufacturing method of equal-hardness Cr5 supporting roller

A manufacturing method and technology for backup rolls, which are applied in the manufacturing field of backup rolls with hardness Cr5, can solve problems such as hardness, wear resistance and contact fatigue decline, and achieve the advantages of improving wear resistance, improving hardenability and good hardness retention. Effect

Active Publication Date: 2021-05-14
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a method for manufacturing an equal-hardness Cr5 backup roll, which solves the problems of the conventional forged steel backup roll in the middle and later stages of use, such as rapid decline in hardness, wear resistance, and contact fatigue, and improves the comprehensive service life and durability of the backup roll. service life

Method used

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  • Manufacturing method of equal-hardness Cr5 supporting roller
  • Manufacturing method of equal-hardness Cr5 supporting roller
  • Manufacturing method of equal-hardness Cr5 supporting roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to Embodiment 4

[0048] Table 1: The comparison table of the main chemical components and weight percentages of backup rolls in Examples 1 to 4 is as follows

[0049]

[0050] Table 2: The comparison table of process parameters of Examples 1 to 4 is as follows

[0051]

[0052]

[0053] Table 3: Comparison table of hardness testing results of Examples 1-4 is as follows:

[0054]

[0055] Table 4: The comparison table of the test results of the metallographic structure of Examples 1 to 4 is as follows

[0056]

[0057]

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PUM

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Abstract

The invention discloses a manufacturing method of an equal-hardness Cr5 supporting roller. The method comprises the following steps: 1) preparing steel raw materials according to chemical components and weight percentage contents in a Cr5 supporting roller material, and preparing a steel ingot according to a smelting procedure production process; 2) preparing a roller blank from the steel ingot according to a forging procedure production process; 3) conducting heat treatment on the roller blank; and 4) machining and detecting the roller blank to obtain the equal-hardness forged steel supporting roller. According to the manufacturing method, the problems that hardness, abrasion resistance and contact fatigue of a conventional forged steel supporting roller are rapidly reduced in the middle and later periods of use are solved, and the comprehensive use period and the service life of the supporting roller are prolonged.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a method for manufacturing an equal-hardness Cr5 backup roll. Background technique [0002] Modern rolling mills are developing towards high efficiency and high precision in order to roll products with higher precision and lower cost. The back-up roll plays a supporting role to prevent the work roll from deflecting and deforming, and some back-up rolls also play the role of transmitting rolling force. Therefore, the back-up roll is required to have high strength and toughness, and the working layer has high wear resistance, contact fatigue strength and other properties; and the more advanced the rolling technology, the higher the performance requirements of the back-up roll. Almost all modern rolling mills use backup rolls made of forged steel, and the material is gradually upgraded from Cr2 and Cr3 to Cr5 to improve strength, wear resistance and other indicators. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/46C22C38/04C22C38/02C22C33/04C21D8/00C21D1/18
CPCC22C38/44C22C38/46C22C38/04C22C38/02C22C33/04C21D8/00C21D1/18C21D1/25C21D7/13B21J1/003B21J1/04
Inventor 刘娣杨昱东韩维国苏军新
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL