Method of producing steel sections of improved quality

Details Method of producing steel sections of improved quality Method of producing steel sections of improved quality

C - Chemistry, Metallurgy

21

D

148/48

C21D 1/18 (2006.01) C21D 1/02 (2006.01) C21D 1/19 (2006.01)

Patent

CA 1112549

ABSTRACT A steel section 6 to 40 mm thick, emerging from a hot rolling mill at 1000 to 800°C is surface quenched for 2 to 6 seconds at a cooling rate of the order of 1.5 to 5 MW(megawatts)/m2. During subsequent self-tempering of the quenched surface by heat from the remainder, the section tends to an equalization temperature of 500 to 700°C.

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