Method of making regular grain oriented silicon steel...

Details Method of making regular grain oriented silicon steel... Method of making regular grain oriented silicon steel...

C - Chemistry, Metallurgy

21

D

C21D 8/12 (2006.01)

Patent

CA 2054331

ABSTRACT A process of producing regular grain oriented silicon steel having a final thickness of from 7 mils (0.18 mm) to about 18 mils (0.45 mm) including the steps of providing a silicon steel hot band, removing hot hand scale, cold rolling to intermediate gauge without an anneal of the hot band, performing an intermediate anneal at a soak temperature of about 1650° F (900° C) to about 1700° F (930° C), subjecting said annealed silicon steel to a first stage slow cooling at a rate of about 500° F (250° C) to about 1050° F (585° C) per minute down to about 1100° F ? 50° F (595° C ? 30° C), thereafter subjecting said silicon steel to a second stage fast cooling down to from about 600° F (315° C) to about 1000° F (540° C) at a cooling rate of from about 2500° F (1390° C) to about 3500° F (1945° C) per minute followed by a water quench, cold rolling to final gauge, decarburizing, applying an annealing separator and final annealing. C7631/1-20

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