Graded multiphase oxycarburized and oxycarbonitrided material sy

Details Graded multiphase oxycarburized and oxycarbonitrided material sy Graded multiphase oxycarburized and oxycarbonitrided material sy

1987-09-21

1989-01-24

Rutledge, L. Dewayne

Metal treatment

Stock

Carburized or nitrided

148 203, 148133, 148316, 148422, 428610, C21D 156, C21D 174

Patent

active

047999772

ABSTRACT:
A graded material system comprising: a refractory metal alloy base having a major metal selected from the group consisting of Group V-B metals (columbium, tantalum and vanadium), and having at least one alloy metal selected from the group consisting of Group IV-B metals (titanium, zirconium and hafnium), Group VI-B metals (molybdenum, tungsten and chromium) and mixtures thereof. The base has a surface containing non-metallic pick-ups in concentration of at least 1 mg/cm.sup.2 at said surface and decreasing inwardly from said surface. The non-metallic pick-ups are selected from the group consisting essentially of: oxygen and carbon; oxygen, carbon and nitrogen; oxygen, carbon and boron; and oxygen, carbon, nitrogen and boron.

REFERENCES:
patent: 3713907 (1973-01-01), Van Thyne
patent: 3783038 (1974-01-01), Van Thyne
patent: 4150195 (1979-04-01), Tobioka
patent: 4357382 (1982-11-01), Lambert
patent: 4399168 (1983-08-01), Kullander
patent: 4490191 (1984-12-01), Hale
patent: 4707384 (1987-11-01), Schachner

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