Method for producing high strength steel excellent in properties

Details Method for producing high strength steel excellent in properties Method for producing high strength steel excellent in properties

1986-04-02

1988-01-19

Dean, R.

Metal treatment

Compositions

Heat treating

148 12F, C21D 714

Patent

active

047203072

ABSTRACT:
A steel which is excellent in mechanical properties after a warm working process is produced by specifying a chemical composition as claimed, subjecting the steel to a controlled rolling under conditions at temperatures of not more than 900.degree. C. and accumulated reduction of more than 30%, leaving it, after the controlled rolling, as it is in the air or performing it to an accelerated cooling wherein the steel is cooled at rate between the air cooling and 100.degree. C./sec until temperatures where a transformation finishes, subsequently reheating the steel to ranges between 400.degree. C. and 750.degree. C., and carrying out the warm working thereon instantaneously or after the air cooling at the temperatures between 250.degree. C. and 750.degree. C.

REFERENCES:
patent: 4406711 (1983-09-01), Nagumo et al.

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