Producing rolled steel products

Details Producing rolled steel products Producing rolled steel products

C - Chemistry, Metallurgy

21

D

148/50

C21D 9/52 (2006.01) C21D 1/02 (2006.01) C21D 1/62 (2006.01) C21D 8/06 (2006.01)

Patent

CA 1076463

ABSTRACT In the rolling mill the temperature of the product is reduced to between Ac3 and Ac3 + 150°C before it enters the finishing stands. The product emerging from the finishing stands is quenched to provide a surface layer of martensite and/or bainite. Subsequently the heat of the core of the product is allowed to raise the temperature of the surface layer to between 450 and 750°C, so that the quenched layer is tempered.

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