Method for remanufacturing scrapped rollers to be qualified rollers

A roll and allowance technology, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve problems such as slippage, broken belt, sticking steel, local overload, peeling of the roll body, economic loss of the roll user, etc., and shorten the manufacturing process. cycle, reduce procurement costs, and reduce resource consumption

Inactive Publication Date: 2014-01-01
湖州市银鑫轧辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Restricted by the model of the rolling mill, after the roll is ground to a certain size or if slipping, strip breakage, steel sticking, local overloading, and peeling of the roll body occur during the rolling process, it must be scrapped in advance and cannot be used again. It caused great economic losses, so how to change the scrapped rolls into qualified rolls is very necessary

Method used

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Embodiment Construction

[0010] The method of the present invention transforms scrap rolls into qualified rolls, wherein the rolls contain the following components in weight percent: C 3.2-3.6%, W 1.2-1.6%, Mo 5.0-7.0%, V 2.0-3.0%, Cr 8.0-10.0 %, Al 0.1-0.4%, Ni 2.2-2.6%, Co 6.5-7.5%, Nb 0.2-0.4%, Ti 0.2-0.4%, Ce 0.4-0.6%, Zr 0.05-0.20%, Si<0.8%, Mn <1.5%, S<0.03%, P<0.04, and the balance is Fe; the specific reforming method is: 1) Adopt the annealing process, specifically put the scrapped rolls in an annealing furnace with a furnace temperature of 600 ± 10°C and keep it warm for 13 hours Afterwards, furnace cooling; 2) Machining the scrapped rolls after annealing into roll blanks, the geometric dimensions of the roll blanks are 6 to 7mm extra margin on each geometric dimension of the target roll; 3) Quenching and tempering treatment , before quenching and tempering treatment, conduct ultrasonic flaw detection on the roll billet, put the roll billet into the trolley furnace with a furnace temperature ...

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PUM

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Abstract

The invention relates to a method for remanufacturing crapped rollers to be qualified rollers. The method particularly comprises the followings: (1), carrying out annealing process; (2), machining the scrapped rollers to be roller blank after annealing; (3), carrying out quenching and tempering treatment; (4), carrying out final heat treatment. Compared with the prior art, the method provided by the invention has the positive effects as follows: the scrapped rollers are remanufactured to be the qualified rollers, the roller manufacturing period is shortened, the procurement cost of enterprises can be reduced, the resource consumption is lowered, the environment pollution is reduced, and the purpose of recycling economy is achieved.

Description

technical field [0001] The invention relates to a method for transforming scrap rolls into qualified rolls. Background technique [0002] Restricted by the model of the rolling mill, after the roll is ground to a certain size or if slipping, strip breakage, steel sticking, local overloading, and peeling of the roll body occur during the rolling process, it must be scrapped in advance and cannot be used again. Cause great economic loss, so how to change scrap rolls into qualified rolls just seems very necessary. Contents of the invention [0003] Aiming at the problems existing in the prior art, the object of the present invention is to provide a technical proposal for a method for transforming scrap rolls into qualified rolls. [0004] The method for converting scrap rolls into qualified rolls is characterized in that the rolls contain the following components by weight percentage: C 3.2-3.6%, W 1.2-1.6%, Mo 5.0-7.0%, V 2.0-3.0% %, Cr 8.0-10.0%, Al 0.1-0.4%, Ni 2.2-2.6%,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/56C21D9/38
Inventor 黄金荣范银芳
Owner 湖州市银鑫轧辊有限公司
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