he role of flux is to remove the oxide on the surface of base metal and brazing filler metal, and avoidre-oxidation during the brazing process. The brazed joint with good quality can be got by using the reasonable brazing filler metal and proper flux and the optimum brazing technological parameters.
| 牌號 Standard | 化學成分(Wt%) Composition | 主要性能及用途 Characteristics and Application |
| FB101 | H3BO3 29～31 KBF4 68～71 | 適用于550～850℃溫度范圍內配合銀釬料釬焊銅及銅合金、鋼及不銹鋼等。 |
| FB102 | KF 40～44 KBF4 21～25 B2O3 33～37 | 適用于600～850℃溫度范圍內配合銀釬料釬焊 銅及銅合金、鋼及不銹鋼等。 |