Method and apparatus for the continuous furnace brazing and gas

Details Method and apparatus for the continuous furnace brazing and gas Method and apparatus for the continuous furnace brazing and gas

1981-09-24

1983-07-26

Sheehan, John P.

Metallurgical apparatus

Means treating solid metal

By contact with gas

266259, C21D 106

Patent

active

043950256

ABSTRACT:
A method for continuously treating an iron member wherein the iron member is first subjected to furnace-brazing in a controlled gas environment and subsequently to a soft-nitriding treatment by addition of ammonia gas (NH.sub.3) to the controlled gas for the brazing. An apparatus for carrying out the method is also provided, and includes three partitioned chambers for brazing, annealing and soft-nitriding the iron member, each chamber being partitioned by a member such as a stainless steel film curtain at opposite sides thereof. A controlled gas feed system communicates with each of the chambers, and an ammonia gas feed system is connected to the soft-nitriding chamber.

REFERENCES:
patent: Re26395 (1970-08-01), Cullen
patent: 1799957 (1931-04-01), Cope et al.
patent: 1808152 (1931-06-01), Baily
patent: 2863303 (1959-05-01), Rusciano
patent: 2872175 (1959-02-01), Guenzi
patent: 2955062 (1960-10-01), Cullen et al.
patent: 3128323 (1964-04-01), Davis
patent: 3598381 (1971-08-01), Schwalm
patent: 3950192 (1976-04-01), Golland et al.
patent: 4093195 (1978-06-01), Schwalm

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