Patent ID: 6840434
Filing Date: 2005-01-11
Classification: B23K

Abstract:
1. A method of applying a solder filler to an aluminum body part, said method comprising the steps of: applying a fluxing agent in paste-like form to the aluminum body part; heating the applied fluxing agent to deoxidize the surface of the aluminum body part; applying a tin-based solder filler to the deoxidized surface of the aluminum body part, the melting point temperature of the solder filler being at least 100 degrees C. lower than the melting point temperature of the aluminum body part and the tin-based solder filler consists of, by weight, of 81% to 85% Sn, 3% to 5% Zn, and 12% to 14% Cu; and heating the solder filler to bond the solder filler to the aluminum body part.