Method of heat treating ferrous metal articles under controlled

Details Method of heat treating ferrous metal articles under controlled Method of heat treating ferrous metal articles under controlled

1981-03-13

1983-06-07

Sheehan, John P.

Metal treatment

Compositions

Heat treating

148 165, 148 166, 148 167, C21D 148

Patent

active

043869726

ABSTRACT:
Method of generating furnace atmospheres and processes for using the atmospheres for carburizing, decarburizing, neutral hardening, annealing or carbonitriding ferrous base metals.
The invention is characterized by forming atmospheres that are a mixture of an oxygen-bearing medium comprising oxygen or a gaseous compound containing oxygen in combination with hydrogen and carbon, a gaseous source of hydrocarbon and an inert gas carrier forming the major component of the mixture. Gaseous ammonia can be substituted for a portion of the inert gas carrier to provide an atmosphere suitable for carbonitriding ferrous base metals.
The normally gaseous mixture is prepared outside of the furnace and then injected into the furnace where reaction of the mixture produces the desired furnace atmosphere.

REFERENCES:
patent: 1975541 (1934-09-01), Osterman
patent: 3413161 (1968-11-01), Goehring
patent: 3620518 (1971-11-01), Winter et al.
patent: 3663315 (1972-05-01), Hoffman et al.
patent: 3705058 (1972-12-01), Koloxsuari et al.
patent: 3748195 (1973-07-01), Kondo et al.
patent: 3950192 (1976-04-01), Golland et al.
patent: 4035203 (1977-07-01), L'Hermite et al.
patent: 4049472 (1977-09-01), Arndt
Holcraft, "Nitrogen . . . Carrier . . . in Carburizing", Metals Progress, Feb. 1948, pp. 2-7.
Titox, "Controlled Atmospheres . . . From . . . Nitrogen & Natural Gas", Met. Term. OB Metalloy, Sep. 1964, pp. 26-31.
Mouflard, "Care Hardening Atmospheres . . . Methanol", Rev. Met. 38, May 1961, pp. 401-405.
Arnold, "Ways to Gas Alloying", Iron & Steel Engr., Aug. 1960, pp. 91-107.
Perry, "Develop. in Controlled Atmospheres", Met. Treating Conference, Birmingham, Jun. 1965, pp. 1-19.
Collin, "Math. Model . . . Carbon Conc . . . in Carburized Steel", Journal Iron and Steel Inst., Oct. 1972, pp. 785-789.
Metals Handbook, vol. 2, 1964, pp. 94, 95, 98, 99, 105, 106 and 122-124.

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