Methods of heat-treating steel

Details Methods of heat-treating steel Methods of heat-treating steel

1977-04-06

1980-07-08

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148 165, C21D 148

Patent

active

042115841

ABSTRACT:
This invention relates to a method of heat-treating steel in a furnace in the presence of a controlled atmosphere.
The H.sub.2 O content of the furnace is determined, the atmosphere is formed by adding to a carrier gas a quantity of a hydrocarbon having the general formula C.sub.x H.sub.y which is necessary and sufficient to reduce the water in the furnace in accordance with the following reaction:
C.sub.x H.sub.y +xH.sub.2 O.fwdarw.xCO+(x+y/2)H.sub.2,
and the steel is raised to a temperature between 650.degree. and 900.degree. C.
The method is applicable to the annealing, heating before quenching, and tempering of steel.

REFERENCES:
patent: 2287467 (1942-06-01), Carpenter et al.
patent: 2815305 (1957-12-01), Ipsen
patent: 3281286 (1966-10-01), Shimizu et al.
patent: 3413161 (1968-11-01), Goehring
Lyman et al. (Ed.): Metals Handbook, II, Ohio (ASM), 1964, pp. 83-86; (Heat reating, etc.).
Lyman et al. (Ed.): Metals Handbook, II, Ohio (ASM), 1964, pp. 70-75.
Metals Handbook, 8th Ed., vol. 2, pp. 14-15, 1964.

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