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A process method of laser cladding superhard high-speed steel for hot-rolled seamless steel pipe stretching and reducing rolls

A laser cladding, seamless steel pipe technology, applied in the direction of metal material coating process, coating, etc., can solve the contradiction between the strength and wear resistance of seamless steel pipe tension reduction roll, achieve excellent high temperature wear resistance, hardness High, uniform coating effect

Active Publication Date: 2017-02-08
SHENYANG DALU LASER COMPLETE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the above-mentioned problems and utilize the excellent technical performance of laser cladding to solve the contradiction between the strength and wear resistance of the seamless steel pipe stretching roll in the process of manufacturing and using, and to provide a hot-rolled seamless steel pipe stretching roll. Roll laser cladding superhard high-speed steel process method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The surface of the stretching and reducing roller is degreased, derusted, and cleaned with alcohol, and the processing area is divided and marked. The processed parts are inspected by the coloring flaw detection method, and the processed parts are required to be free of cracks, pores, inclusions and other defects.

[0036] (2) Manufacturing of alloy powder and adjustment of automatic powder feeding device.

[0037] Prepare super-hard high-speed steel alloy powder with excellent high-temperature red hardness and good metallurgical compatibility with the matrix. The chemical composition is: C: ≤0.03%, Cr: 0-1.0%, Ni: 5-7%, Mo: 6-7.5%, Si: ≤0.1%, W: 12-15%, Al: 0.05-0.15%, Ti: 0.3-0.5%, B: 0-0.3% Co: 13-15%, the balance is Fe.

[0038] A method for preparing superhard high-speed steel alloy powder.

[0039] Fe, C, Cr, Ni, Mo, W, Si, Al, Ti, B, Co are extracted according to the above weight percentages and put into a vacuum intermediate frequency induction furnace, heate...

Embodiment 2

[0057] The surface of the stretching and reducing roller is degreased, derusted, and cleaned with alcohol, and the processing area is divided and marked. The processed parts are inspected by the coloring flaw detection method, and the processed parts are required to be free of cracks, pores, inclusions and other defects.

[0058] (2) Selection of alloy powder and adjustment of automatic powder feeding device.

[0059]Prepare super-hard high-speed steel alloy powder with excellent high-temperature red hardness and good metallurgical compatibility with the matrix. The chemical composition is: C: ≤0.03%, Cr: 0-1.0%, Ni: 5-7%, Mo: 6-7.5%, Si: ≤0.1%, W: 12-15%, Al: 0.05-0.15%, Ti: 0.3-0.5%, B: 0-0.3% Co: 13-15%, the balance is Fe.

[0060] A method for preparing superhard high-speed steel alloy powder.

[0061] Fe, C, Cr, Ni, Mo, W, Si, Al, Ti, B, Co are extracted according to the above weight percentages and put into a vacuum intermediate frequency induction furnace, heated to ...

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Abstract

The invention relates to a process for performing laser cladding of a superhard high speed steel by hot rolling of a stretch reducing roller of a seamless steel pipe, which is characterized by comprising the following steps: removing oil and rust on the surface of the stretch reducing roller, washing by alcohol, labeling by partitioning a processing area; preparing the superhard high speed steel powder alloy powder, adjusting an automatic powder feeding apparatus so that the alloy powder from an automatic powder feeding head can just fall in a laser molten pool, adjusting the powder feeding amount; selecting a 3.5*1mm broadband integration mirror, and adjusting defocusing amount to make a focused laser spot as an rectangular shape, employing a synchronization powder feeding apparatus for automatically seeding the alloy powder into a laser molten pool, forming an uniform and compact laser cladding layer on the surface; cladding and then performing flaw detection examination, then performing thermal treatment on the stretch reducing roller. The selected superhard high speed steel powder and the stretch reducing roller matrix have good metallurgy and mechanical compatibility, the cladding layer and the matrix can form firm metallurgy combination, hardness is high, thickness is uniform, and crack and spalling phenomena can not be generated.

Description

technical field [0001] The invention relates to a method for repairing parts of metallurgical equipment using laser cladding technology, in particular to a process method for laser cladding superhard high-speed steel of hot-rolled seamless steel pipe stretching rollers, which belongs to the technical field of laser cladding. Background technique [0002] The hot-rolled seamless steel pipe is an important key consumption part of the seamless steel pipe production line. The performance and service life of the stretching and reducing roller not only determine the consumption of the roll, but also determine the production output and efficiency of the seamless steel pipe, energy consumption and product quality. The main performance that determines the service life of the roll is the roll strength and the high temperature wear resistance of the surface. [0003] Laser cladding technology is a technology that uses high-energy-density laser beams to achieve expected changes in the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C38/54C22C38/50C22C38/14
Inventor 赵越陈海涛张威
Owner SHENYANG DALU LASER COMPLETE EQUIP
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