METHOD FOR JOINING INTERMETALLIC COMPOUND OF TI-AL SYSTEM AND TI-BASED ALLOY

摘要

PURPOSE:To allow easy joining of an intermetallic compd. of a Ti-Al system and a Ti-based alloy without generating the deterioration in the joint part by executing the conditions of a specific friction stress, specific friction stress imparting time, and specific upsetting pressure at the time of joining the above- mentioned compds. to each other by friction pressure welding. CONSTITUTION:The conditions of 1 to 6kgf/mm2 friction pressure P1, 1 to 4 seconds time t1 for impartation the friction pressure, and =10kgf/mm2 upset pressure P2 are satisfied at the time of joining the intermetallic compds. of the Ti-Al system and the Ti-based alloy to each other by friction pressure welding. The pressure P1 is applied to a material 1 to be rolled and a material 2 to be rolled is rotated by a motor and is supported by bearings 3, 4. The material 1 is held static during this time. Joining is not executed when the friction pressure P1 is lower than the specific range. The materials are burred or cracked if the pressure exceeds the range. The burred part is cracked if the upset pressure P2 exceeds the specific value. The coupling by the friction pressure welding is enable in this way and the excellent characteristics of the intermetallic compd. are effectively utilized.