Heat exchanger stainless steel vacuum casting brazing filler metal welding planeconnector and machining and welding method

A processing method for a stainless-steel heat-exchanger port with a braze joint interface formed from a brazing filler material by vacuum melting and molding;

• wherein the stainless-steel heat-exchanger port comprises:
• a stainless-steel port, an annular groove provided at a to-be-brazed end face of the stainless-steel port, the brazing filler material correspondingly arranged in the annular groove, and a sealing cover for preventing overflowing of the brazing filler material when melted, wherein the brazing filler material is one of copper, brass, phosphorus copper, and silver brazing filler materials;
• wherein the processing method comprises:
• providing the annular groove at the to-be-brazed end face of the stainless-steel port, and placing the brazing filler material in the annular groove;
• and placing the sealing cover over the brazing filler material and then heating the stainless-steel port together with a heat exchanger in a vacuum furnace to a temperature above a melting point of the brazing filler material, so that the brazing filler material melts and fills a molding space between the annular groove and the sealing cover and is joined to the stainless-steel port heated to the temperature, thus covering the to-be-brazed end face of the stainless-steel port with the brazing filler material.