GE ALLOY BRAZING FILLER METAL EXHIBITING JOINT STRENGTH AT HIGH TEMPERATURE

摘要

PURPOSE:To improve joint strength at a high temp. by forming the titled brazing filler metal of a compsn. contg. specific weight % of Al and Cu and consisting of the balance Ge and impurities and adding prescribed % of Si, Sb Ga and Ni thereto at need. CONSTITUTION:The compsn. components of the brazing filler metal are composed of 30-50wt% A and 0.01-10% Cu, are composed of the balance Ge and inevitable impurities and are incorporated therein with 50-70% Ge component. 1 or =2 kinds among Si, Sb, Ga and Ni are added thereto at 0.1-3% at need. The Ge and Al components in the co-existing state have the effect to improve the joint strength and the Cu improves the wettability and flow characteristics of the brazing filler metal. The Si, Sb, Ga and Ni have the effect of increasing the joint strength by improving the wettability of the brazing filler metal. The joint strength is, therefore, improved by the improvement in the wettability of the brazing filler metal at the high temp.