Thermal mechanical treatment for enhancing high temperature prop

Details Thermal mechanical treatment for enhancing high temperature prop Thermal mechanical treatment for enhancing high temperature prop

1983-01-05

1984-03-20

Stallard, W.

Metal treatment

Compositions

Heat treating

C21D 714

Patent

active

044379005

ABSTRACT:
Disclosed is a thermal mechanical treatment for improving the high temperature properties of cast austenitic heat resistant chromium-containing alloy steel structures which method comprises (a) heating the structures to at least the temperature at which chromium carbides go into solution, but below the temperature where incipient melting occurs; (b) maintaining the structures at such a temperature long enough so that at least 50% of the chromium carbides go into solution; (c) applying from about 15% to 60% plastic deformation by hot forming operations; and (d) cooling the structures to room temperature at such a rate to allow complete recrystallization of the grains to occur.

REFERENCES:
patent: 2920007 (1960-01-01), Buckland
patent: 2931744 (1960-04-01), Samuels
patent: 3201288 (1975-08-01), Grange
patent: 3755004 (1973-08-01), Miller
patent: 4138279 (1979-02-01), Murakami et al.
patent: 4314861 (1982-02-01), Murakami et al.

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