High duty ductile cast iron with superplasticity and its heat tr

Details High duty ductile cast iron with superplasticity and its heat tr High duty ductile cast iron with superplasticity and its heat tr

1975-06-04

1978-06-20

Stallard, W.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148 35, 148139, C21D 500

Patent

active

040960021

ABSTRACT:
A spheroidal graphite cast iron containing some carbide stabilizing elements to have the maximum strain rate sensitivity factor of more than 0.3 and having very refined grain matrix structure, so that having an improved toughness at room temperature and having a matrix which is composed of fine austenite and fine ferrite grains and superplastic properties at the temperature between the eutectoid transformation temperature range and 50.degree. C higher than that temperature range; and the method of heat treatment to obtain the said spheroidal graphite cast iron.

REFERENCES:
patent: 2796373 (1957-06-01), Berg
patent: 3000770 (1961-09-01), Wittmoser
patent: 3005736 (1961-10-01), Peras
patent: 3013911 (1961-12-01), Peras
patent: 3155498 (1964-11-01), Jandras
patent: 3850699 (1974-11-01), Gierek et al.
patent: 3860457 (1975-01-01), Vourinen et al.
patent: 3893873 (1975-07-01), Hanai
patent: 3951697 (1976-04-01), Sherby et al.

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