Pressure welding process of pots with stainless steel multilayer composite bottoms

The invention relates to the machining field of stainless steel pots. A pressure welding process is used to form ultrafine crystal particles approaching superplastic state among a plurality of layers of pot compounded bottom interfaces, and atoms on the surfaces of the interfaces and the crystal particles form binding force so that seamless connection is realized for the welding of the plurality of layers of pot compounded bottom interfaces, and a top-grade pot chicken product with the compound bottom is obtained. Since any welding assistant is not used, the pressure welding process reduces the production procedures and the production cost, in addition, a soldering flux is not used, a touch part can not be corroded. The process can well solve the problems of off-bottom, bubbling, desoldering and the like when the product is baked, cooled and subjected to circulation test for many times, and prolongs the service life of the product.