Producing rolled steel products

Details Producing rolled steel products Producing rolled steel products

1976-01-29

1977-04-05

Stallard, W.

Metal treatment

Compositions

Heat treating

148145, 148156, C21D 952

Patent

active

040160092

ABSTRACT:
In the rolling mill the temperature of the product is reduced to between Ac.sub.3 and Ac.sub.3 + 150.degree. 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.degree. and 750.degree. C, so that the quenched layer is tempered.

REFERENCES:
patent: 2756169 (1956-07-01), Corson et al.
patent: 3011928 (1961-12-01), Kopec et al.
patent: 3735966 (1973-05-01), Hoffmann

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