Metal fusion bonding – Process – Critical work component – temperature – or pressure
Patent
1986-07-21
1988-02-23
Godici, Nicholas P.
Metal fusion bonding
Process
Critical work component, temperature, or pressure
22826316, 420508, 420512, B23K 3530, B23K 3102
Patent
active
047265086
ABSTRACT:
A method of brazing corrosion resistant, nickel-based, thin-walled tubing which includes substantial proportions of nickel, chromium and molybdenum to a stainless steel base member using a filler metal, principally comprising gold as a major constituent and nickel as a minor constituent, in a vacuum furnace without introducing stress corrosion cracks in the brazed tubing and also avoiding carbon precipitation. The brazing is conducted at a temperature of at least about 1900.degree. F. (1038.degree. C.) for a sufficient period of time to allow any carbide precipitation formed during the heating to redissolve and also to permit full, uniform flow of the filler metal. The heated members are rapidly quenched in an inert atmosphere to a temperature at least sufficiently low to avoid carbon precipitation in the tubing.
REFERENCES:
patent: 4274908 (1981-06-01), Fishter et al.
patent: 4405391 (1983-09-01), DeCristofaro
patent: 4508257 (1985-04-01), Bose et al.
patent: 4556240 (1985-12-01), Yoshida
patent: 4604328 (1986-08-01), Mizahara
Metals Handbook, 8th edition, vol. 2, pp. 257-268, 1964.
Godici Nicholas P.
Heinrich Samuel M.
Micro Motion Inc.
Palmer William D.
Pezdek John Victor
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