High speed steel cold roller

A cold roll and high-speed steel technology, applied in the field of high-speed steel cold rolls, can solve the problems of difficult control of the uniformity of the structure, large tendency of forging cracking, and difficult to popularize and use, so as to improve the anti-accident performance, reduce the structure segregation, and is beneficial to The effect of marketing

Inactive Publication Date: 2015-06-17
YIXING YONGCHANG ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the total amount of alloy in the high-carbon high-speed steel material is too high, resulting in serious segregation tendency, and the uniformity of structure is not easy to control; at the same time, the cost is too high, and it is not easy to popularize and use; and the carbon content is too high, the forging cracking tendency is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A high-speed steel cold rolling roll, the high-speed steel cold rolling roll comprises the following chemical components by mass percentage: C is 0.7%; Si is 0.95%; Mn is 0.3%; Cr is 7.5%; Ni is 0.4%; Mo is 1.0% %; W is 0.1%; V is 0.9%; Nb is 0.07%; the rest is Fe and unavoidable impurities. The raw material of the high-speed steel cold rolling roll is smelted in an electric furnace→outside the furnace refining→vacuum degassing→casting electrode→electroslag remelting→forging→spheroidizing annealing→rough machining→quenching and tempering heat treatment→semi-finishing→roll body heat treatment→finishing Processing→finished rolls, testing the finished finished rolls: obtain a high-speed steel cold roll with a surface hardness of 66-67HRC, a hardness uniformity of ≤1.5HRC, a tensile strength of the roll neck of 1340MPa, and a V-notch impact energy of 26J.

Embodiment 2

[0021] A high-speed steel cold rolling roll, the high-speed steel cold rolling roll comprises the following chemical components by mass percentage: C is 0.75%; Si is 0.85%; Mn is 0.5%; Cr is 9%; Ni is 0.2%; Mo is 1.5% %; W is 0.15%; V is 1.2%; Nb is 0.05%; the rest is Fe and unavoidable impurities. The raw material of the high-speed steel cold rolling roll is smelted in an electric furnace→outside the furnace refining→vacuum degassing→casting electrode→electroslag remelting→forging→spheroidizing annealing→rough machining→quenching and tempering heat treatment→semi-finishing→roll body heat treatment→finishing Processing→finished rolls, testing the finished rolls: obtain a high-speed steel cold roll with a surface hardness of 65-66HRC, a hardness uniformity of ≤1.5HRC, a tensile strength of the roll neck of 1280MPa, and a V-notch impact energy of 23J.

Embodiment 3

[0023] A kind of high-speed steel cold rolling roll, this high-speed steel cold rolling roll comprises the following chemical composition by mass percentage: C is 0.8%; Si is 0.8%; Mn is 0.2%; Cr is 7%; Ni is 0.5%; Mo is 2.0% %; W is 0.18%; V is 1.5%; Nb is 0.09%; the rest is Fe and unavoidable impurities. The raw material of the high-speed steel cold rolling roll is smelted in an electric furnace→outside the furnace refining→vacuum degassing→casting electrode→electroslag remelting→forging→spheroidizing annealing→rough machining→quenching and tempering heat treatment→semi-finishing→roll body heat treatment→finishing Processing→finished rolls, testing the finished finished rolls: obtain a high-speed steel cold roll with a surface hardness of 66-67HRC, a hardness uniformity of ≤1.5HRC, a tensile strength of the roll neck of 1320MPa, and a V-notch impact energy of 28J.

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Abstract

The invention discloses a high speed steel cold roller. The high speed steel cold roller comprises, by mass, 0.6-1.0% of C, 0.5-1.0% of Si, 0.2-1.0% of Mn, 6.0-10.0% of Cr, 0.2-0.8% of Ni, 0.5-2.0% of Mo, 0.1-0.5% of W, 0.5-2.0% of V, 0.05-0.20% of Nb, and the balance of Fe and inevitable impurities. The surface hardness, the hardness uniformity, the neck tensile strength and the V notch impact work of the roller are 63-67HRC, 1.5HRC or less, 1200MPa or more and 20J or more respectively. The produced high speed steel cold roller has the advantages of strong surface roughness maintaining ability and good accident resistance when the high speed steel cold roller is used for rolling high strength steel plates, can be widely used in rough rolling and finish rolling frames of a cold rolled steel band rolling mill, and greatly improves working efficiency of the rolling mill.

Description

technical field [0001] The invention relates to the technical field of rolls, in particular to a high-speed steel cold roll with good hardenability, hardenability and red hardness and good surface roughness retention. Background technique [0002] With the rapid development of home appliances, automobiles, and electronics industries, many large tandem cold rolling mills have been put into operation one after another. High-end fields such as home appliances and automobiles have very high requirements on the quality of the surface of the plate, and the strength of the steel plate is getting higher and higher. At the same time, the rolls used are required to have good roughness retention performance, long rolling cycle, and good accident resistance. High strength and other properties, so the requirements for the comprehensive performance of the roll are greatly improved. Due to its excellent wear resistance and red hardness, high-speed steel will be the development trend of r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/48
Inventor 陈彬杨国平
Owner YIXING YONGCHANG ROLL
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