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Processing method of hot sprayed gradient coatings based on time after time laser refusing

A laser remelting and gradient coating technology, applied in coating, device for coating liquid on surface, surface pretreatment, etc., can solve problems such as effective remelting and effective bonding, improve bonding performance, overcome grain length, etc. Larger, less impactful effects

Inactive Publication Date: 2008-01-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The purpose of the present invention is to affect the bonding between the coatings and the effective relationship between the coating and the substrate due to the fact that the existing thermal spraying gradient coating has multiple sub-coatings and cannot achieve effective remelting in one laser remelting. Combined with the problem, a thermal spray gradient coating processing method based on multiple laser remelting was invented

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  • Processing method of hot sprayed gradient coatings based on time after time laser refusing

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] As shown in Figure 1.

[0025] A thermal spray gradient coating processing method based on multiple laser remelting, the steps are:

[0026] First, the surface of the substrate is purified and activated;

[0027] Secondly, spraying the first transition material on the surface of the substrate by using a thermal spraying device to obtain the first transition coating;

[0028] Third, after the transitional coating is cooled, use a high-power laser to perform the first laser remelting treatment on the obtained coating to achieve the metallurgical bond between the coating and the substrate;

[0029] Fourth, spray a second transition material on the surface of the first transition coating after laser remelting to prepare a second transition coating;

[0030] Fifth, use the laser again to perform a second laser remelting treatment on the resulting c...

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Abstract

A hot spray grads coat processing method based on multi-time laser remelting belongs to a novel material processing method. The method has a main innovative point that the multi-time laser remelting method is adopted for the composite process of the hot spraying grads coats, and the defects that not all sub-coat reaches the metallurgy combination, the grads structure in the coats is damaged and the hot spraying laminated organization can not be eliminated, etc. on the conditions of remelting without laser or one-time laser remelting are overcome. The detailed process is that the purification and activation disposal are firstly disposed to the base metal material, the first grads material is sprayed on the surface of the base and one-time laser remelting is sequentially carried out for the first grads layer, causing the first grads layer to form the metallurgy combination with the base; after that, the second grads material is sprayed on the surface of the first grads layer after remelting of laser and the secondary laser remelting is carried out, causing the metallurgy combination to be formed between the two grads oats; sequentially adopting the method, the hot spraying and laser remelting process are respectively carried out to all grads coats. The invention has the advantages of simple and reliable processing method and meeting the comprehensive performance requirements of coats.

Description

technical field [0001] The invention relates to a processing method of a multi-gradient coating material, in particular to a processing method of thermal spraying gradient coating on the surface of a base material, in particular to a processing method of thermal spraying gradient coating based on multiple laser remelting. Background technique [0002] At present, in aviation, aerospace, national defense, automobile, shipbuilding, chemical industry, steel and other industries, coatings are more and more widely used. Coatings with various components can greatly improve the wear resistance, heat resistance, corrosion resistance and other properties of the base parts. Compared with non-gradient coatings, gradient coatings have better mechanical properties, high temperature properties, and longer service life. In recent years, gradient coatings have attracted widespread attention from various countries and become one of the important directions of advanced coating research. [0...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/38B05D3/00
Inventor 黄因慧田宗军沈理达王东生刘志东
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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