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Method for repairing large-scale roller

A roll and large-scale technology, which is applied in the field of repairing large-scale metallurgical rolls, can solve the problems of small practical application value of large-scale metallurgical rolls, no very stable and reliable large-scale rolls, and high cost of laser cladding materials, so as to achieve suitable promotion and use and low repair costs. , the effect of high success rate

Inactive Publication Date: 2006-07-05
李贞
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] At present, the technologies for repairing rolls mainly include laser alloy cladding technology and surfacing repair technology. Laser cladding technology has good processing performance and stable effect on workpieces, but laser cladding materials have high cost and low cladding efficiency. The requirements for the large area and large repair layer of the roll have little practical application value
Metallurgical roll surfacing repair technology requires the roll repair layer to be a high-hardness, high-alloy material that is wear-resistant, high-temperature resistant, and impact-resistant. It has high requirements for surfacing materials, heat treatment processes, weather, and the quality of operators. The risk is high, the repair success rate is low, and there are few practical applications
At present, there is no very stable and reliable large-scale roll repair technology, and the consumption of steel rolling rolls is large, and a large number of rolls can only be discarded after being scrapped, resulting in a serious waste of materials

Method used

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Experimental program
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Embodiment

[0009] I. Select low-alloy, medium-low-carbon welding materials, and repair the surface of the roll by surfacing welding to meet the required size. After repairing, the repair layer is medium-carbon low-alloy steel with relatively low hardness (HRc30-45).

[0010] II. The surfacing layer is used as the transition layer, and a high-power laser generator (3 kW ~ 10 kW) is used to irradiate the surface of the workpiece to form a molten pool, and the laser powder feeding device is used to fuse high-carbon and high-alloy powder with the repair layer , forming a high-performance roll working layer.

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Abstract

This invention publishes a repair method for large casting rollers. In this method, surface welding technology and laser cladding technology are well combined so that respective drawbacks are avoided and advantages are further exerted. Generally speaking, it is a low-risk and reliable repair method.

Description

technical field [0001] The invention relates to a method for repairing rolls, in particular to a method for repairing large metallurgical rolls. Background technique [0002] At present, the technologies for repairing rolls mainly include laser alloy cladding technology and surfacing repair technology. Laser cladding technology has good processing performance and stable effect on workpieces, but laser cladding materials have high cost and low cladding efficiency. The requirements of large area and large repair layer of the roll have little practical application value. Metallurgical roll surfacing repair technology requires the roll repair layer to be a high-hardness, high-alloy material that is wear-resistant, high-temperature resistant, and impact-resistant. It has high requirements for surfacing materials, heat treatment processes, weather, and the quality of operators. The risk is high, the repair success rate is low, and there are few practical applications. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 徐振江钱红兵马光亭李京安张翠香李宗勤李贞
Owner 李贞
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