Patent ID: 7909232
Filing Date: 2011-03-22
Classification: B22D,B23K

Abstract:
1. A method of manufacturing a mold welded to a dissimilar metal member, comprising: (i) a first step of pressingly bringing the dissimilar metal member into contact with a mold formed of copper or a copper alloy in a stationary state at a friction pressure of 60 MPa or more for 2 to 20 seconds while rotating the dissimilar metal member at a speed of 130 m/min or more, (ii) a second step of stopping the dissimilar metal member to a rotating speed of 0 (zero) m/min, and (iii) a third step of, after stopping rotating the dissimilar metal member, applying a forced pressure of 150 MPa or more for 5 to 30 seconds, the pressure of the third step being larger than the pressure of the first step to the mold, thereby welding the mold to the dissimilar metal member.