Method for improving wetting and spreading performance of reaction wetting system material

Abstract

The invention discloses a method for improving the wetting and spreading performance of a reaction wetting system material. The method comprises the following steps that the surface of a stainless steel base plate is scanned and processed by adopting an ultrafast laser processing technology to obtain a micro-nano stripe texture of which the stripe average width is 1.2-1.4 microns and the stripe average spacing is 1.4-1.6 microns; and the wetting angle of the same brazing filler metal on the scanned and processed stainless steel base plate is 0.9 degrees - 3.3 degrees smaller than the wetting angle of the same brazing filler metal on an unprocessed stainless steel base plate. According to the method, microtexture processing is carried out on the surface of the reaction wetting system material through ultrafast laser, the surface appearance of the reaction wetting system material is changed, the surface roughness is changed, the unique morphology of the micro-nano stripe texture is obtained, and the unique morphology of the micro-nano stripe texture can greatly enhance the capillary action in the brazing filler metal wetting and spreading process, so that the wetting and spreading power of the brazing filler metal on the surface of the reaction wetting system material is improved, the brazing filler metal reacts with the base plate more sufficiently, and the application prospectis great.

Description

technical field [0001] The invention belongs to the technical field of material surface modification, and relates to a method for improving the wetting and spreading performance of a reactive wetting system material. Background technique [0002] 316 stainless steel is mainly composed of Fe, Cr, Ni and Mo. It has the advantages of strong corrosion resistance, high heat resistance, and good welding performance. It is widely used in marine, aerospace and other industrial fields. However, although 316 stainless steel has good application prospects, it needs to be connected with aluminum and aluminum alloys in practical applications (such as the duct structure of aerospace thrusters, the cylinder structure of aluminum alloy and stainless steel, and the stainless steel and aluminum alloy in pressure cookers). The structure of the bottom of the pot, taking advantage of the connection of dissimilar materials) However, in terms of thermophysical properties (melting point, thermal co...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art, such as cumbersome operation, slow preparation rate, low precision and easy formation of brittle compounds, and provide an improved reaction moistening compound with fast preparation rate, simple preparation process, small processing affected area and high processing precision. Method for Wetting and Spreading Properties of Wet System Materials

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