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

A system and reaction technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problems of cumbersome operation, low precision, slow preparation rate, etc., and achieve the goal of improving microstructure, improving connection performance, and fully reacting Effect

Pending Publication Date: 2020-09-18
SHANGHAI UNIV OF ENG SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment 1

[0034] A method for improving the wetting and spreading performance of a reactive wetting system material, the specific steps are as follows:

[0035] (1) Cut the large stainless steel plate into a 5mm×5mm×1mm stainless steel substrate, polish it with 600#, 800#, 1000#, 1200# sandpaper respectively, and then immerse it in absolute ethanol solution for ultrasonic cleaning for 15min, Among them, the composition of stainless steel is Fe-17.2Cr-11.6Ni-2.7Mo-0.8Si-1.5Mn;

[0036] (2) After placing the stainless steel substrate on the workbench, focus the ultrafast laser on the part to be processed of the stainless steel substrate, and then scan and process on the surface of the stainless steel substrate to obtain a micro-nano stripe texture with an average width of 1.3 μm and an average spacing of 1.5 μm. structure ( Figure 4Group b is the image of the processed substrate under OM, UTM and SEM), wherein the ultrafast laser includes a laser emitter, a mirror, an aperture, an atten...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352B23K26/359B23K26/60
CPCB23K26/352B23K26/359B23K26/60
Inventor 杨瑾刘志杨陈宗杰徐佳宜魏迪陈捷狮刘红兵于治水
Owner SHANGHAI UNIV OF ENG SCI
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