Brazing is composed of Brazing and lead clearance, preprocessing, Heating, Clearance after Brazing, and Post processing.
It is required to maintain the heater JIG and fixing tool by determining the basic material, morphology, dimension and brazing method for application before brazing. It must be used the proper JIG and fixing tool of refractories, ceramics, graphite, and heat resisting steel by brazing temperature or brazing method. Preprocessing is important Because the clearance of joint surface influences on the quality of molten lead and joint strength.
Joint must be the clear one of metal surface to sufficiently show the wetting with weak flux. Flux is for separating or melting oxidation film and preventing oxidation from heating, and it must not to be contaminated with dust and fingerprint as follows
dust or mote
oil, grease, fingerprint
each kind of chemicals such as carbonic chemicals.
