タフピッチ銅⁄アルミニウム合金摩擦圧接継手の引張強度特性

抄録

Joint performance was examined by tensile tests in respect of the friction welded joint of tough pitch copper and aluminum alloy using braking method. The materials of this experiment were C1100 (tough pitch copper) and aluminum alloys A1050, A5052, A6061, and A6063. Conditions of friction pressure welding for rotational frequency and upset time were constant (N_s=3000min^-1, T₂=10 s) . Conditions for friction pressure P₁, friction time T₁ and upset pressure P₂ change in every classification of the sample material. Those conditions for which the sample material joints seemed to be optimal in the preliminary experiment were selected. Using them, the experiment was carried out.
Results showed 96% joint efficiency in the C1100⁄A1050 joint. Other joints showed joint strengths that were greatly inferior to the base metal strength. Performance in joints produced with A6061 with artificial aging hardening was examined for joint strength improvement, as well as in joints that underwent solution heat treatment before the junction, and in joints that underwent solution heat treatment after they were produced. Results showed slight improvement in joint efficiency. Furthermore, intermetallic compounds were not observed in joints that had undergone solution heat treatment.