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Alloy for producing cold rolled working roll and method for producing same

A technology of cold-rolled work rolls and alloys, which is applied in the field of alloys for manufacturing high-hardness cold-rolled work rolls. It can solve the problems of increasing roll consumption, affecting strip quality and product qualification rate, increasing costs, etc., and achieving improved tempering stability. properties, improve brittleness, and prolong service life

Active Publication Date: 2008-07-23
BAOSTEEL ROLL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the steel plate is rolled, the "roll mark" defect will be transmitted to the steel plate, affecting the quality of the strip steel and product qualification rate, and increasing the consumption of rolls and increasing the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (Example 1, alloys used to manufacture cold-rolled work rolls)

[0016] The alloys used to make cold-rolled work rolls have the following weight percentages of their chemical composition:

[0017] The weight percentage of the chemical composition in the alloy is: C is 0.9%, Si is 0.85-1.25%, Mn is 0.40-0.60%, Cr is 2.50-5.50%, Ni is 0.25-0.45%, Mo is 0.25-0.45%, V It is 0.05~0.15%, and the rest is Fe and unavoidable impurities; among them, S≤0.015, P≤0.020.

[0018] The alloy in this embodiment is subjected to roll blank forging→spheroidizing hydrogen expansion treatment→turning→quenching and tempering→turning→roll body quenching treatment→grinding to obtain a cold-rolled work roll, wherein in the roll body quenching treatment process, Use the power frequency sensor and medium frequency sensor to heat the surface quenching method, the temperature of the roll in the power frequency sensor heating zone is 910°C, the temperature in the medium frequency sensor heating zone...

Embodiment 2

[0019] (Example 2, alloys for manufacturing cold-rolled work rolls)

[0020] The weight percent of the chemical composition in the alloy is: C is 1.05%, Si is 0.85-1.25%, Mn is 0.40-0.60%, Cr is 2.50-5.50%, Ni is 0.25-0.45%, Mo is 0.25-0.45%, V It is 0.05~0.15%, and the rest is Fe and unavoidable impurities; among them, S≤0.015, P≤0.020. The alloy in this embodiment is used to manufacture cold-rolled work rolls with the same manufacturing method and process parameters as in Example 1, and the depth peeling test is carried out on the obtained roll body to detect its roll body The depth and hardness of the hardened layer, the test results show that the surface hardness of the hardened layer can reach 99HSD, and the effective hardened layer depth of 90HSD or greater can reach 29mm.

Embodiment 3

[0021] (Example 3, alloys for manufacturing cold-rolled work rolls)

[0022] The alloys used to make cold-rolled work rolls have the following weight percentages of their chemical composition:

[0023] C is 1.20%, Si is 0.85-1.25%, Mn is 0.40-0.60%, Cr is 2.50-5.50%, Ni is 0.25-0.45%, Mo is 0.25-0.45%, V is 0.05-0.15%, and the rest is Fe and unavoidable impurities; where S≤0.015, P≤0.020.

[0024] The alloy in this embodiment is used to manufacture cold-rolled work rolls with the same manufacturing method and process parameters as in Example 1, and the depth peeling test is carried out on the obtained roll body to detect its roll body The depth and hardness of the hardened layer, the test results show that the surface hardness of the hardened layer can reach 98HSD, and the effective hardened layer depth of 90HSD or greater can reach 28mm.

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Abstract

The invention relates to an alloy for cold-rolling worker rollers and its preparing process, wherein the alloy comprises the main chemical constituents of: C 0.9-1.2%, Si 0.85-1.25%, Mn 0.40-0.60%, Cr 2.50-5.50%, Ni 0.25-0.45%, Mo 0.25-0.45%, V 0.05-0.155 and balancing Fe.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to an alloy suitable for manufacturing high-hardness cold-rolled work rolls and a method for manufacturing the alloy. Background technique [0002] Because the cold-rolled work rolls work under complex stress conditions such as bending, twisting, and extrusion. At this time, the surface of the part is subjected to much higher stress than the core, and the surface is constantly worn. Therefore, it must be subjected to Surface quenching produces a hardened layer on the body of the cold-rolled work roll. The hardened layer should have sufficient hardness, strength, and wear resistance. In order to withstand the impact load, the body and body of the roll should still maintain sufficient plasticity and toughness. . [0003] If the hardness of the cold-rolled work roll body is small, it is easy to permanently deform locally on the work roll body during the cold rolling process, which is co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/46C22C1/02
Inventor 杨国平葛浩彬王稼秋
Owner BAOSTEEL ROLL SCI & TECH
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