本申请涉及一种钎焊双环组合件，由药芯带芯钎焊环和有对接缝隙的药芯扁环配合构成，药芯扁环的外侧为环状扁平面，药芯带芯钎焊环的内侧为环状扁平面，药芯带芯钎焊环包括药芯钎料带、钎料芯丝，药芯钎料带两侧末端朝同一侧弯曲后与钎料芯丝连接，药芯钎料带与钎料芯丝之间空腔填充钎剂，药芯扁环外侧为环状扁平面，药芯扁环内填充钎剂。药芯带芯钎焊环的药芯钎料带两侧末端与钎料芯丝连接处朝外或朝下。本申请结构简洁，通过药芯带芯钎焊环的连接处缝隙以及药芯扁环的对接缝隙，在避免钎剂和空气接触反应的同时提高钎料和母材接触面及热传导效率，钎剂在加热反应后从缝隙中流出，优先到达母材表面，达到钎剂优先反应的效果。

The application relates to a brazing double-ring assembly, which is composed of a flux-cored and cored brazing ring and a flux-cored flat ring with a butting gap. The outer side of the flux-cored flat ring is an annular flat surface, and the flux-cored and cored brazing ring The inner side of the core is a circular flat surface. The flux-cored brazing ring includes a flux-cored solder tape and a solder core wire. The ends of both sides of the flux-cored solder tape are bent to the same side and then connected with the solder core wire. The cavity between the strip and the solder core wire is filled with flux, the outside of the core flat ring is an annular flat surface, and the inside of the flat core ring is filled with flux. In the flux-cored brazing ring, the ends of both sides of the flux-cored brazing material band and the joint of the brazing material core wire face outward or downward. The application has a simple structure. Through the joint gap of the flux-cored brazing ring and the butt gap of the flux-cored flat ring, the contact reaction between the flux and the air is avoided, and the contact surface of the brazing filler metal and the base material and the heat transfer efficiency are improved. After the heating reaction, it flows out from the gap and preferentially reaches the surface of the base material, achieving the effect of preferential reaction of the flux.