Method of manufacturing a steel having good formability and good

Details Method of manufacturing a steel having good formability and good Method of manufacturing a steel having good formability and good

1995-09-13

1997-07-08

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C21D 802

Patent

active

056456565

ABSTRACT:
A method is provided for manufacturing a low carbon steel having good formability and good resistance to indentation. In this method, an ingot of low carbon steel is first hot-rolled, followed by a cold rolling of the resulting hot-rolled sheet. The cold-rolled sheet is then subjected to a first high temperature annealing to cause recrystallization and dissolution of some of the carbon contained in the steel. Next, the sheet is subjected to a second low temperature annealing to cause to dissolved carbon to precipitate as iron carbide. Finally, the sheet is work-hardened by a minor cold-rolling operation.

REFERENCES:
patent: 3936324 (1976-02-01), Uchida et al.
patent: 4050959 (1977-09-01), Nakaoaki et al.
patent: 5232524 (1993-08-01), Lafontaine et al.

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