To provide a composite contact with excellent durability, capable of improving bond strength of an interface by a little silver alloy, eliminating waste in manufacturing and exhibiting stable contact performance for a long period.
A composite contact includes: a flange with a large diameter formed in one end part of a base part with a small diameter; a contact part made of silver alloy, constituting the upper surface part of the flange; and a foot made of copper alloy in which a large diameter part constituting the lower surface part of the flange and the base part with the small diameter is integrally formed. A method for manufacturing the composite contact comprises: the primary molding step of bonding a copper alloy wire 12 and a silver alloy wire 13 while extending an outer diameter of the silver alloy wire 13 to an inner diameter of a hole 21 of a molding die in the state that an extended diameter of the copper alloy wire 12 is limited by the inner peripheral surface of the hole 21 by forging the copper alloy wire 12, and the silver alloy wire 13 with an outer diameter smaller than that of the copper alloy wire 12 in an abutted state against each other in the hole 21, to form a primary compact consisting of a silver alloy part and a copper alloy part; and the secondary molding step of forging the silver alloy part, a bonded interface between the silver alloy part and the copper alloy part, and one end part including the copper alloy part in the primary compact to form the flange.
UMEOKA HIDEKI
MURAHASHI NORIAKI
YAMANASHI SHINJI
INABA AKIHIKO
TAKIZAWA HIDEO
MITSUBISHI MATERIALS CORP
| JPS57181740A | 1982-11-09 | |||
| JPH0197331A | 1989-04-14 | |||
| JPS61121214A | 1986-06-09 | |||
| JPS63241892A | 1988-10-07 |
| US4744502A | 1988-05-17 |