Ion-beam nitriding of steels

Details Ion-beam nitriding of steels Ion-beam nitriding of steels

1986-01-29

1987-11-03

Sheehan, John P.

Metal treatment

Compositions

Heat treating

20419231, 427 38, C21D 148

Patent

active

047041684

ABSTRACT:
A surface of a steel substrate is nitrided without external heating by exposing it to a beam of nitrogen ions under a low pressure. The pressure is much lower than that employed for ion-nitriding, and an ion source is used instead of a glow discharge. Both of these features reduce the introduction of impurities into the substrate surface.

REFERENCES:
patent: 3341352 (1967-09-01), Ehlers
patent: 3832219 (1974-08-01), Nelson et al.
patent: 3900636 (1975-08-01), Curry et al.
patent: 4105443 (1978-08-01), Dearnaley et al.
patent: 4250009 (1981-02-01), Cuomo et al.
Weissmantel et al, "Preparation of Hard Coatings by Ion Beam Methods", Thin Solid Films 63 (1979), pp. 315-325.
Jindal, "Ion Nitriding of Steels", J. Vac. Sci. Technol. 15(2) Mar./Apr., pp. 313-317.
Salik, Joshua, "Ion-Beam Nitriding of Steels", J. Appl. Phys. 57(4), Feb. 15, 1985, pp. 1328-1331.

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