Explanation

A weld method in which the base metal of the weldment is heated to a certain temperature and the base metal is connected by melting brazing filler metal. The base metal does not melt during weld - so the liquidus of brazing filler metal should be lower than the solidus of the base metal. The molten brazing filler metal fills the gap at the base metal connection by interface wetting and capillarity. Forming brazing seams. During soldering. brazing filler metal and base metal will dissolve and diffusion each other, forming a solid metallurgical bond. brazing filler metal metals usually use copper, silver, gold, tin and other metals and their alloy. brazing filler metal with a melting point higher than 450 ° C is called soldering, and brazing filler metal with a melting point lower than 450 ° C is called soft soldering. The widely used soldering methods in industry include flame soldering, furnace soldering, induction soldering, immersion soldering, soldering iron soldering, resistance soldering, arc soldering, laser soldering, etc. soldering is widely used in aerospace, electrical and electronic, household appliances, instruments, automobiles and other manufacturing industries.

Classification