Process for producing, by continuous annealing, soft...

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

C - Chemistry, Metallurgy

21

D

148/10

C21D 8/02 (2006.01) C21D 9/52 (2006.01)

Patent

CA 1240593

- 22 - PROCESS FOR PRODUCING, BY CONTINUOUS ANNEALING, SOFT BLACKPLATE FOR SURFACE TREATMENT ABSTRACT OF THE DISCLOSURE 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°C or less; a coiling temperature of 620°C to 710°C; continuous annealing having a heat pattern to decrease the solute carbon and nitrogen; and skin-pass rolling.

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