Functional layer alloy powder and method for repairing finish-rolling descaling box pinch roller through laser cladding

A technology of laser cladding and alloy powder, which is applied in the direction of coating, metal material coating process, etc., can solve the problems of increasing the cost of laser cladding, achieve stability and uniformity, reduce the addition of alloy elements, and improve the durability The effect of abrasiveness and corrosion resistance

Active Publication Date: 2019-04-05
沈阳大陆激光工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After using this material to repair the pinch roll of the finish rolling descaling box, the high temperature wear resistance of the roll surface can be improved, and the service life of the roller table can be extended; The repair method of repairing, using this method can effectively solve the problem of increased laser cladding cost caused by large wear of the roller diameter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for pinching rolls in a finish rolling descaling box of a steel plant 2150 line includes the following steps.

[0029] Alloy powder selection and mixing.

[0030] In view of the working conditions such as thermal fatigue, wear and corrosion in the application of the pinch roller, the iron-based self-fluxing alloy mixed powder with excellent corrosion resistance, wear resistance and thermal fatigue resistance is selected as the functional layer repair of the feeding roller Material. Among them, the mass fraction of TiC is: 2%; the chemical composition mass fraction of iron-based alloy powder is: 0.1% C, 2.0% Si, 3% B, 5% Cr, 1% Ni, and the rest is Fe . The preferred particle size of TiC powder is 150-200 mesh, and the purity is above 95%; the preferred particle size of iron-based alloy powder is 120-300 mesh. Use a powder mixer for powder mixing, and the mixing time is not less than 3 hours.

[0031] Pinch roll preconditioning before repair.

[0032] The fa...

Embodiment 2

[0037] A method for pinching rolls in a finish rolling descaling box of a steel plant 2250 line includes the following steps.

[0038] Alloy powder selection and mixing.

[0039] In view of the working conditions such as thermal fatigue, wear and corrosion in the application of the pinch roller, the iron-based self-fluxing alloy mixed powder with excellent corrosion resistance, wear resistance and thermal fatigue resistance is selected as the functional layer repair of the feeding roller Material. Among them, the mass fraction of TiC is: 15%; the chemical composition mass fraction of iron-based alloy powder is: 1.1% C, 5.0% Si, 6% B, 10% Cr, 5% Ni, and the rest is Fe . The preferred particle size of TiC powder is 150-200 mesh, and the purity is above 95%; the preferred particle size of iron-based alloy powder is 120-300 mesh. Use a powder mixer for powder mixing, and the mixing time is not less than 3 hours.

[0040] Pinch roll preconditioning before repair.

[0041] The ...

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Abstract

The invention provides functional layer alloy powder for repairing a finish-rolling descaling box pinch roller through laser cladding. The functional alloy powder is composed of the components, by mass percentage, of 2-15 % of TiC powder, 0.1-1.1 % of C, 2.0-5.0 % of Si, 3-6 % of B, 5-10 % of Cr, 1-5 % of Ni, and the balance Fe. Meanwhile, the invention provides a method for repairing the finish-rolling descaling box pinch roller through laser cladding, the size of an original roller can be restored by repairing the finish-rolling descaling box pinch roller through the method, properties of the high-temperature wear resistance and the thermal fatigue resistance are improved, the repair cost is reduced, and the service life of the finish-rolling descaling box pinch roller is prolonged, so that the roller consumption is reduced and the production cost of enterprises is reduced.

Description

technical field [0001] The invention belongs to the technical field of repairing damage to roller table workpieces, in particular to a functional layer alloy powder and a method for laser cladding repairing of a pinch roller of a finish rolling descaling box. Background technique [0002] The descaling box of the finishing mill is the key equipment of the whole rolling line. It uses high-pressure water to remove impurities such as iron scale on the surface of the intermediate billet, so that the surface of the strip rolled by the finishing mill has a high degree of smoothness. The pinch rollers are located at the entrance and exit of the descaling box. They are mainly divided into upper pinch rollers and lower pinch rollers. They are subjected to the combined effects of thermal load, friction and erosion during work. The surface of the pinch rollers should have good Excellent wear resistance, corrosion resistance and thermal fatigue resistance to ensure the quality of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/54C22C38/50C22C38/02C23C24/10
CPCC22C38/02C22C38/50C22C38/54C23C24/103
Inventor 倪春雷陈海涛董思远
Owner 沈阳大陆激光工程技术有限公司
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