A new processing technique produces high carbon-high nitrogen iron alloys b
y melting iron-carbon steels in a hot isostatic pressing (HIP) furnace with
nitrogen as the pressurizing gas. Furnace cooling O-1 tool steel with enha
nced nitrogen concentrations resulted in the retention of the austenite pha
se without formation of carbide and nitride precipitates. The duplex austen
ite/ferrite structure has enhanced hardness, strength, and wear resistance.
(C) 1999 Kluwer Academic Publishers.