| 摘要 |
PURPOSE:To prevent formation of an intermetallic compd. and to obtain satisfactory joint strength by cutting the surface layers of the soft metals at the end edges of hard metal joint furfaces to form fresh surfaces and bringing the joint surfaces and the fresh surfaces into press contact with each other thereby enabling joining at a low temp. CONSTITUTION:A jig 10 set therein with blocks 1, 7, 7 is introduced into a chamber and the atmosphere is maintained in a vacuum. While the respective blocks are kept heated, a hard metal block 1 is pressurized and depressed. The surface layers in the tapered parts 8, 8 of soft metal blocks 7, 7 are cut by the edges 5, 6 of the block 1 according to the descending of the block 1 by which fresh surfaces are formed on the blocks 7, 7 and are brought into tight contact with the surfaces in the tapered parts 2, 3 of the block 1. The pressurizing force is then decreased and after this state is maintained, the jig is cooled, by which the diffusion joining between both is completed. |
