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Contact fatigue-highly resistant cold-rolling intermediate roller and manufacture method thereof

A contact fatigue and manufacturing method technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as scrapping and loss of roll quality, and achieve the effect of improving the strength of the matrix, improving the strength and toughness, and high resistance to contact fatigue.

Active Publication Date: 2015-01-21
YIXING YONGCHANG ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, about 60% of the rolls of users will lose quality or be scrapped in advance due to contact fatigue performance during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A cold-rolled intermediate roll with high resistance to contact fatigue, the composition and weight percentage of the roll are: 0.81 C; 0.77 Si; 0.32 Mn; 0.015 P; 0.009 S; 3.04 Cr; 0.32 Ni Mo of 0.38; V of 0.13; the remaining components are Fe and unavoidable impurities. The manufacturing process of the high anti-contact fatigue cold-rolled intermediate roll is: electric furnace smelting→outside furnace refining→vacuum degassing→casting electrode rod→electroslag remelting→forging→annealing heat treatment→rough machining→quenching and tempering heat treatment→semi-finishing →Roll body heat treatment→finishing→finished cold-rolled middle roll. The annealing heat treatment of the cold-rolled intermediate roll includes hydrogen expansion annealing and spheroidizing annealing. The spheroidizing annealing process is: ≤300°C into the furnace→heating to 800°C and holding→furnace cooling to 720°C and holding→furnace cooling to 660°C and holding→ Cool the furnace to ≤300°C and l...

Embodiment 2

[0022]A cold-rolled intermediate roll with high resistance to contact fatigue, the composition and weight percentage of the roll are: 0.78 C; 0.75 Si; 0.28 Mn; 0.017 P; 0.010 S; 2.85 Cr; 0.30 Ni Mo of 0.35; V of 0.11; the remaining components are Fe and unavoidable impurities. The manufacturing process of the high anti-contact fatigue cold-rolled intermediate roll is: electric furnace smelting→outside furnace refining→vacuum degassing→casting electrode rod→electroslag remelting→forging→annealing heat treatment→rough machining→quenching and tempering heat treatment→semi-finishing →Roll body heat treatment→finishing→finished product. The annealing heat treatment of the cold-rolled intermediate roll includes hydrogen expansion annealing and spheroidizing annealing. The spheroidizing annealing process is: ≤300°C into the furnace→heating to 800°C and holding→furnace cooling to 720°C and holding→furnace cooling to 660°C and holding→ Cool the furnace to ≤300°C and leave the furnace ...

Embodiment 3

[0024] A cold-rolled intermediate roll with high resistance to contact fatigue, the composition and weight percentage of the roll are: 0.82 C; 0.70 Si; 0.35 Mn; 0.012 P; 0.008 S; 2.94 Cr; 0.33 Ni Mo of 0.41; V of 0.15; the remaining components are Fe and unavoidable impurities. The manufacturing process of the high anti-contact fatigue cold-rolled intermediate roll is: electric furnace smelting→outside furnace refining→vacuum degassing→casting electrode rod→electroslag remelting→forging→annealing heat treatment→rough machining→quenching and tempering heat treatment→semi-finishing →Roll body heat treatment→finishing→finished product. The annealing heat treatment of the cold-rolled intermediate roll includes hydrogen expansion annealing and spheroidizing annealing. The spheroidizing annealing process is: ≤300°C into the furnace→heating to 800°C and holding→furnace cooling to 720°C and holding→furnace cooling to 660°C and holding→ Cool the furnace to ≤300°C and leave the furnace...

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PUM

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Abstract

The invention discloses a contact fatigue-highly resistant cold-rolling intermediate roller and a manufacture method thereof, the roller comprises the following components by weight percentage: 0.70-0.85% of C, 0.40-1.00 of Si, 0.20-0.60% of Mn, 2.80-3.50% of Cr, 0.25-0.60% of Ni, 0.30-0.50% of Mo, 0.10-0.30% of V, less than or equal to 0.02 of P; less than or equal to 0.015 of S, and the balance of Fe and inevitable impurities. The manufacture method comprises the following steps: smelting in an electric furnace, refining outside the electric furnace, degassing under vacuum, casting an electrode bar, remelting electroslag, forging, annealing and performing heat treatment, roughly machining, tempering and performing heat treatment, semifinishing, performing heat treatment on the roller body, finely tempering, and acquiring the finished product roller. By reducing the content of an element C and increasing the content of Si, Ni and Mo elements, strength and toughness performance as well as the matrix strength of the intermediate roller can be increased, and tissue can be refined, and the cold-rolling intermediate roller has high contact fatigue resistance through heat treatment.

Description

technical field [0001] The invention relates to the field of materials and heat treatment, in particular to a cold-rolled intermediate roll which is improved on the basis of Cr3 roll material so that the roll has high contact fatigue resistance and a manufacturing method thereof. Background technique [0002] In recent years, with the rapid development of home appliances, automobiles, and electronics industries, the development momentum of cold rolling enterprises is very strong. Many cold-rolled products of private enterprises have also entered mid-to-high-end industries such as home appliances and high-end building materials. These industries have very high requirements for the quality of the surface of the plate, and the performance requirements for the rolls have also been greatly improved. At present, most of the cold rolling units are six-high rolls, which are a set of work rolls, a set of intermediate rolls, and a set of back-up rolls. The work rolls are in direct co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46C21D9/38C21D1/18C21D1/32
CPCC21D1/18C21D1/32C21D9/38C22C38/02C22C38/44C22C38/46
Inventor 陈彬杨国平曹旭
Owner YIXING YONGCHANG ROLL
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