US 12,169,104 B2
Heat exchanger stainless steel vacuum casting brazing filler metal welding planeconnector and machining and welding method
Shangzhong Ji, Shanghai (CN)
Filed by Shangzhong Ji, Shanghai (CN)
Filed on Jul. 21, 2022, as Appl. No. 17/870,030.
Application 17/870,030 is a continuation of application No. PCT/CN2020/134186, filed on Dec. 7, 2020.
Prior Publication US 2022/0397350 A1, Dec. 15, 2022
Int. Cl. B23K 1/00 (2006.01); B23K 1/008 (2006.01); F28F 9/02 (2006.01); B23K 101/14 (2006.01); B23K 103/04 (2006.01)
CPC F28F 9/0248 (2013.01) [B23K 1/0012 (2013.01); B23K 1/008 (2013.01); B23K 2101/14 (2018.08); B23K 2103/05 (2018.08); F28F 2275/045 (2013.01)] 1 Claim
OG exemplary drawing
 
1. 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.