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Roller shaft surface coating method

A technology of surface coating and roller shaft, which is applied in the field of surface coating of roller products, can solve the problems of decreased bonding, easy peeling off of hardness, easy cracking of the coating, etc. Good thermal shock performance

Pending Publication Date: 2021-02-12
XIANGYANG ZHENBEN TRANSMISSION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is only suitable for the micro-metallurgical bonding layer with surface self-fluxing on the soft substrate, and the thermal deformation is greater than the requirements of roll products.
[0014] Supersonic spraying on the surface of roller products is expected to solve the contradiction between the improvement of coating hardness of traditional coating materials and the toughness and brittleness of roller products, as well as the matching and bonding between the coating and the substrate, the coating is easy to crack, and the hardness Problems such as easy falling off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The roller base of the present invention is made of GCr15 material, and the roller product is obtained through the following steps in sequence: (1) rough turning: removing most of the machining allowance on the surface of the roller; (2) surface quenching treatment: improving the hardness of the roller surface, the highest can Reaching HV780; (3) Finishing machining of other parts of the roller shaft; (4) Grinding: can reduce the deformation of the roller surface and improve roughness; (5) Aging treatment: eliminate the processing stress of the roller shaft; (6) Semi-fine grinding Grinding: preparing for the subsequent spraying of the roller shaft; (7) surface coating treatment: improving the wear resistance and comprehensive performance of the roller surface; (8) fine grinding.

[0029] Roller surface coating treatment includes four main steps: preparation before spraying, surface pretreatment, spraying, and post-spraying treatment.

[0030] Prepare before spraying. F...

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PUM

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Abstract

The invention relates to a roller shaft surface coating method which is used for surface treatment of a roller shaft in metallurgical equipment. A roller shaft base body is made of a GCr15 material, and a roller shaft product is obtained through rough turning, surface quenching treatment, finish turning, grinding, aging treatment, semi-finish grinding, surface coating treatment and finish grindingin sequence. The roller shaft surface coating treatment comprises preparation before spraying, surface pretreatment, spraying and treatment after spraying. Supersonic flame spraying equipment is adopted for surface coating treatment, the relative movement speed of a spray gun and the roller shaft can reach 1200 m / s, the coating density can reach 17.5 g / cm<3>, and the oxide content is smaller thanor equal to 0.05%. A coating is low in porosity, compact and uniform in structure and good in thermal shock resistance, the corrosion resistance and toughness of the coating, the bonding strength, hardness, porosity and abrasion performance of the coating are excellent, the roller shaft can be repaired, the abrasion resistance of a straightening roller can be improved, the service life of the straightening roller is prolonged, the surface quality of steel is improved, environmental friendliness is achieved, and renewable energy is utilized.

Description

technical field [0001] The invention relates to the technical field of metallurgical equipment, in particular to a method for surface coating of roll products. Background technique [0002] With the rapid development of cutting-edge science and modern industry, it is necessary to require mechanical equipment to operate stably for a long time under harsh working conditions such as high temperature, high pressure, high speed and high automation, as well as severe wear and corrosion. It is obviously uneconomical or even impossible to manufacture overall equipment and parts with materials to obtain surface protection and strengthening effects. [0003] The surface strengthening treatment technology of roller products is mainly divided into induction heating and quenching technology, surfacing technology, thermal spraying technology, thermal spray welding technology and laser surface modification technology. [0004] (1) Induction heating and quenching technology [0005] Induc...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/06C23C4/02C23C4/18
CPCC23C4/129C23C4/06C23C4/02C23C4/18
Inventor 孙小丛齐赛易平邓廷全李文喜
Owner XIANGYANG ZHENBEN TRANSMISSION EQUIP