Process for manufactue of circular workpieces

Details Process for manufactue of circular workpieces Process for manufactue of circular workpieces

C - Chemistry, Metallurgy

21

D

148/10

C21D 9/40 (2006.01)

Patent

CA 1051758

ABSTRACT OF THE DISCLOSURE A process for the manufacture of circular workpieces from hypereutectoid steel, which forms, after quenching or harde- ning, a low carbon martensite with a dislocation structure. This process consists in the preparation of ring shaped semipro- ducts by centrifugal casting, cleaning of these semiproducts from layers of slag and other impurities, cooling these rings from the casting temperature to a temperature at the maximum 100° C below the eutectoid temperature change of the structure of this steel, again heated to a temperature at the maximum 100° C above the temperature of eutectoid change. After obtaining a structure of spheroidized perlite, the temperature is raised to a value at the maximum 1150° C, the semiproduct is formed for instance by rol- ling, thereafter quenched and tempered.

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