Patent ID: 6691910
Filing Date: 2004-02-17
Classification: B22F,B23K,C22C,C23C

Abstract:
A method of joining different metal materials by friction welding, comprising the steps of:holding a first material made of Ti alloy by a rotating chuck of a friction welding machine, said first material having a smaller diameter portion and a larger diameter portion at an end; holding a second material made of Tiâ€”Al intermetallic compound by a stationary chuck of the friction welding machine, the smaller diameter portion of the first material being substantially equal in diameter to an end of the second material; pressing the end of the second material into the larger diameter portion at the end of the first material; rotating the first material in the rotating chuck at high speed; stopping rotation of the first material to join the end of the second material in the end of the first material firmly; and wherein the end of the first material is cooled while the end of the second material is heated to provide difference in temperature between the ends of the first and second materials for suitable joining.