Joined body of ceramic member and metallic member, and process f

Details Joined body of ceramic member and metallic member, and process f Joined body of ceramic member and metallic member, and process f

1990-11-16

1991-12-31

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

228122, C21D 100

Patent

active

050768638

ABSTRACT:
A joined body of a ceramic member and a metallic member is used as tappets in internal-combustion engines, tools employing brazing etc., and is joined to each other through a layer of a brazing filler material, in which the brazing filler material has a solidus point of not higher than 700.degree. C., the metallic member comprises a metallic material of which the pearite transformation is brought about at a temperature not higher than the solidus point of the brazing filler material or is inhibited, and the metallic structure after joining comprises at least one of a supercooled structure and a martensite structure. A joining process for producing the joined body comprises the steps of heating an assembly of the ceramic member, the metallic member and the brazing filler material arranged in the position to or above the austenitic transformation point of the metallic material, and cooling the assembly at a predetermined cooling rate by gaseous medium cooling.

REFERENCES:
patent: 4591535 (1986-05-01), Mizuhara
patent: 4598025 (1986-07-01), Mizuhara
patent: 4711386 (1987-12-01), Mizuhara
patent: 4735866 (1988-04-01), Moorhead
Brazing Manual, 3rd ed., American Welding Society, 1976, pp. 30-31.

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