Centrifugally cast tube of spheroidal graphite cast-iron and its

Details Centrifugally cast tube of spheroidal graphite cast-iron and its Centrifugally cast tube of spheroidal graphite cast-iron and its

1983-02-24

1984-05-15

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 35, 148139, 148141, 164114, C21D 506, C21D 908

Patent

active

044486103

ABSTRACT:
The cast tube (T) is subjected internally in a chill-mould (1) to the uniform spraying of water from 1000.degree. C. approximately to 350.degree. C. approximately. Then it is extracted from the chill-mould and in a furnace is subjected to isothermal bainitization maintenance, after which it is cooled in the atmosphere to ambient temperature. Without it being necessary to add expensive chilling elements, one thus obtains lightened tubes having very good mechanical properties and the ovalization of which remains acceptable.

REFERENCES:
patent: 2855336 (1958-10-01), Curry
patent: 2867555 (1959-01-01), Curry
patent: 3702269 (1972-11-01), Church
patent: 3860457 (1975-01-01), Vourinen et al.
patent: 3954133 (1976-05-01), Miyaoka et al.
patent: 4177088 (1979-12-01), Pierrel

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