| 摘要 |
<p>PURPOSE:To execute brazing in a good position by interposing a composite mixed brazing filler metal consisting of specific weight ratios of Au powder and Sn-In alloy powder in a weld zone and executing brazing of mainly the Sn-In alloy at a specific temp., then heating the weld zone to a specific temp. to diffuse both the brazing filler metals. CONSTITUTION:The composite mixed brazing filler metal consisting, by weight, of 45-90% high melting Au powder and the low melting Sn-In alloy powder is interposed in the weld zone. The brazing filler metal is then heated to 160-200 deg.C above the m.p. of the Sn-In alloy by which the brazing of mainly the Sn-In alloy is executed. The brazing filler metal is then heated up to 250-300 deg.C at which the Sn-In alloy does not flow so much to diffuse the Sn-In alloy and Au so as to enhance the joint strength. Brazing is satisfactorily executed without forming an intermetallic compd. with the weldment and without changing the position.</p> |
