Method of producing a wear resistant mechanical component

Details Method of producing a wear resistant mechanical component Method of producing a wear resistant mechanical component

1997-12-30

2000-02-08

Ryan, Patrick

Metal fusion bonding

Process

Metal to nonmetal with separate metallic filler

2281245, 2282332, B23K 3102

Patent

active

060219394

ABSTRACT:
A method of producing a wear resistant mechanical component is disclosed which enables the crown value of a wear resistant tip to be controlled at one's desire. A component preform is provided by placing the wear resistant tip on a metal body with a brazing material interposed between them. The wear resistant tip has a smaller coefficient of thermal expansion than that of the metal body. The component preform is heated up to a brazing temperature selected from the temperature range between an austenite transformation starting temperature at which the metal body begins to undergo austenitic transformation and an austenitic transformation ending temperature at which the metal body terminates the austenitic transformation. The heated component preform is cooled down to the normal temperature so that the wear resistant tip is deformed into a crown shape having a crown value corresponding to the brazing temperature. The crown value of the wear resistant tip can be further controlled by varying either the holding time at the brazing temperature or the cooling rate of the component preform. The crown value of the wear resistant tip decreases as the brazing temperature gets higher, as the holding time at the brazing temperature becomes longer or as the cooling rate grows lower.

REFERENCES:
patent: 5076863 (1991-12-01), Taniguti et al.
patent: 5390843 (1995-02-01), Ito et al.
patent: 5770322 (1998-06-01), Nishioka et al.
patent: 5783314 (1998-07-01), Yamagiwa et al.
patent: 5809842 (1998-09-01), Yamagiwa et al.

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