Title:
CAST-IN STRUCTURE OF DISSIMILAR METAL
Document Type and Number:
Japanese Patent JP3283442
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the strength and the heat transmissivity by achieving the silver plating or nickel-boron plating on a copper alloy bush to be cast in a pin hole of a piston for an internal combustion engine to keep the cast-in interface of a metallic bonded condition.
SOLUTION: Copper plating and silver plating are successively achieved on an outer surface of a copper alloy bush 10 to form a composite plated layer having a silver plated layer of 3 μm in thickness on an electrolytic copper plated layer of 3 μm in thickness. The bush 10 is arranged in a casting mold after the heating at 300°C in the atmosphere, and cast in with aluminum alloy 28 of high strength. The wettability to aluminum alloy of the bush 10 is improved, a diffusion layer and a compound layer 32 of CuAl2 and Cu9Al4 are formed in the metallic bonded condition without generating any discontinuous layer on the bonded interface. Then kind of the plating need not be limited to the combination of copper with silver, and other combination of other metals, such as the combination of nickel with boron may be acceptable.
Inventors:
Toshiaki Kuroki
Application Number:
JP20375497A
Publication Date:
May 20, 2002
Filing Date:
July 14, 1997
Export Citation:
Assignee:
Hino Motors Ltd.
International Classes:
F02F3/00; B22D19/00; B22D19/08; C22C21/02; F02F3/10; F16J1/01; F16J1/16; (IPC1-7): B22D19/00; B22D19/08; F02F3/00; F02F3/10; F16J1/01; F16J1/16
Domestic Patent References:
| JP7124737A | ||||
| JP9329056A | ||||
| JP9229192A | ||||
| JP6156764A | ||||
| JP6428356A | ||||
| JP561258A | ||||
| JP60155752U | ||||
| JP60155751U |
Attorney, Agent or Firm:
Osamu Matsumura
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