Metal treatment – Compositions – Heat treating
Patent
1978-01-31
1979-08-28
Stallard, W.
Metal treatment
Compositions
Heat treating
148156, C21D 952
Patent
active
041659961
ABSTRACT:
Wire rod is subjected to a cooling operation while emerging from a hot rolling mill. The rod is first cooled to a temperature of 850.degree. to 650.degree. C. and is then kept at substantially this temperature for a time sufficient for austenite to be transformed into ferrite. The rod is then cooled to a temperature of 625.degree. to 400.degree. C., and is kept at substantially this temperature, or allowed to cool slowly, for a time not shorter than 15 seconds and sufficiently long to permit precipitation of carbon in the form of carbides.
REFERENCES:
patent: 3783043 (1974-01-01), Almond et al.
patent: 3874950 (1975-04-01), Grozier et al.
patent: 3939015 (1976-02-01), Grange
patent: 3940294 (1976-02-01), Sergeant
patent: 4040872 (1977-08-01), Mudiare
Centre de Recherches Metallurgiques--Centrum voor Research in de
Stallard W.
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