Bonding of 4032 Aluminum Alloy to Aluminum Bronze by Pulse Electric Current Sintering Method

摘要

Bonding of 4032 aluminum to aluminum bronze was tried using a pulse electric current method. The initial current, which was adopted at heating until bonding temperature, had much effect on tensile strength of joints. At high heating rate 250 deg C/min with high initial current, the tensile strength of some joints attained about 80 percent of base metal. But at slow heating rate 25 deg C/min, strength of the joints is low.The process temperature was controlled at carbon dies. At high heating rate, temperature at bonding interface was higher than one of carbon dies. Then local melting along bonding interface occurred and formed the metallic compound. At low heating rate, the reaction layer was formed at bonding interface by solid reaction. In order to heat bonding interface locally, it is effective to adopt the high heating rate and the application of intermediate material powder at bonding interface.