Manufacture of grinding members of ferrous alloys

Details Manufacture of grinding members of ferrous alloys Manufacture of grinding members of ferrous alloys

1974-05-03

1976-06-08

Dean, R.

Metal treatment

Compositions

Heat treating

148 124, 148 35, 148138, 148141, C21D 714

Patent

active

039619940

ABSTRACT:
Forged grinding members and a method for their manufacture from white cast iron having a high chromium content comprising heating a bar of white cast iron of 1.5% to 3% by weight carbon, 8 to 25% by weight chromium, 0% to 2% by weight molybdenum at a temperature of 1000.degree. to 1120.degree.C then forming pieces from the bar at the above temperature and thereafter forging these pieces at a second temperature of 1000.degree. to 1070.degree.C followed by hardening with optional intermediate isothermal treatment. The selection of the first and second temperatures depends on the chemical composition of the initial material and on the desired martensitic or austenitic micrographic structure of the desired product to obtain chromium carbides exclusively of the M.sub.7 C.sub.3 type.

REFERENCES:
patent: 2773761 (1956-12-01), Fuqua et al.
patent: 3844844 (1974-10-01), Sato

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