A kind of process method for filling spot welding stainless steel high-entropy alloy powder and a kind of high-entropy alloy powder filling spot welding stainless steel

Abstract

The invention discloses a technique method for filling spot welding stainless steel high-entropy alloy powder and for filling spot welding stainless steel with high-entropy alloy powder. According to the technique method for filling the spot welding stainless steel high-entropy alloy powder and for filling the spot welding stainless steel with the high-entropy alloy powder, the high-entropy alloy powder is mainly composed of AlFeCuCoNiTiCrx, wherein the x is molar ratio of the Al to the Cr and is between 0 to 0.3, and the size of the powder is 100-300 meshes. When high-entropy alloy powder media are used as a filling layer, the contact resistance of a stainless steel material which are different to weld at the early welding stage is improved, resistance heat is used as a welding heat source, partial melting of the surface of the material to be welded is achieved under the protection of protective air and under the action of the resistance heat, an oxidation film can be broken under the impact effect of proper electrode pressure, refining of the high-entropy alloy powder media can be achieved on the interface of the material to be welded, a molten core and a single face-centered cubic tissue are formed on the interface, and then the strength and the corrosion resistance of a connector are improved. The technique method for filling the spot welding stainless steel high-entropy alloy powder and for filling the spot welding stainless steel with the high-entropy alloy powder has the advantages that welding can be achieved under the thermal compensation condition, the flexibility is strong, and ideal engineering significance is achieved.

Description

technical field

[0001] The invention relates to the field of stainless steel welding, in particular to a high-entropy alloy powder for filling spot welding stainless steel and a process method for filling spot welding stainless steel with high-entropy alloy powder. Background technique

[0002] As a corrosion-resistant material, stainless steel has always been valued by the industry, and the spot welding method is one of the main methods for stainless steel connection. At present, the research on stainless steel spot welding mainly includes argon arc welding, laser beam, electron beam, and friction stir spot welding, but the above-mentioned spot welding methods consume a lot of energy, have low production efficiency, and high equipment, maintenance and operation costs. Resistance spot welding stainless steel is an excellent choice, but the nugget formed after resistance welding stainless steel welding undergoes a phase change, which leads to corrosion during use, resulting i...

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