Process for producing, by continuous annealing, soft blackplate

Details Process for producing, by continuous annealing, soft blackplate Process for producing, by continuous annealing, soft blackplate

1985-07-03

1987-10-06

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

72366, 148 12C, 148 12D, 148 123, C21D 802

Patent

active

046981020

ABSTRACT:
Steel blackplate for surface treatment, having a soft temper degree of T-3 or less, and improved fluting resistance is produced by the combination of a chemical composition of 0.01% to 0.08% carbon, 0.015% or less phosphorus, without titanium and niobium; steelmaking without vacuum-degassing; a low slab-heating temperature of 1240.degree. C. or less; a coiling temperature of 620.degree. C. to 710.degree. C.; continuous annealing having a heat pattern to decrease the solute carbon and nitrogen; and skin-pass rolling.

REFERENCES:
patent: 3839095 (1974-10-01), Kubotera et al.
patent: 4040873 (1977-08-01), Nakaoka et al.
patent: 4113517 (1978-09-01), Nakaoka et al.
patent: 4374682 (1983-02-01), Abe et al.
patent: 4391653 (1983-07-01), Takechi et al.
The Making, Shaping and Treating of Steel, United States Steel, 1971, p. 1000.

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