Bainitic core grinding rod

Details Bainitic core grinding rod Bainitic core grinding rod

C - Chemistry, Metallurgy

21

D

241/96

C21D 9/36 (2006.01) B02C 17/20 (2006.01)

Patent

CA 1315254

ABSTRACT OF THE DISCLOSURE A carbon or alloy steel heat treated grinding rod having improved wear resistance and breaking resistance for use in a rotating grinding mill. The surfaces of the rod has a martensitic microstructure having a hardness of at least HRC 55. The core of the rod has a bainitic microstructure having a hardness of at least HRC 40. A preferred rod composition includes at least .7% carbon, at least .25% of molybdenum, at least .25% chromium, less than .7% manganese, the balance iron and unavoidable impurities, all percentages by weight.

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