Metal treatment – Compositions – Heat treating
Patent
1974-07-29
1976-03-16
Stallard, W.
Metal treatment
Compositions
Heat treating
148 124, C21D 700, C21D 900
Patent
active
039444422
ABSTRACT:
A process for producing a highly formable steel capable of affording yield strengths upwards of 90,000 psi through air hardening and without need of liquid quenching, the steel preferably contains correlated percentages of chromium and nickel among other elements and should be in the martensitic condition prior to the first heat treating step.
REFERENCES:
patent: 2449806 (1948-09-01), Fetzer et al.
patent: 3278345 (1966-10-01), Grange et al.
patent: 3619302 (1971-11-01), Aoki et al.
patent: 3732127 (1973-05-01), Furgason
Kenny Raymond J.
MacQueen Ewan C.
Stallard W.
The International Nickel Company Inc.
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