Powders for producing hard materials in short reaction times for

Details Powders for producing hard materials in short reaction times for Powders for producing hard materials in short reaction times for

1988-07-20

1991-05-28

Dean, R.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite powder

75252, 75254, 75255, B22F 100

Patent

active

050194542

ABSTRACT:
Powders for producing hard materials in short reaction times are provided, especially for use in electric arc spraying. The powders are produced by bonding metallic and non-metallic starting materials to one another by spray-drying or agglomeration, using an organic or inorganic binder. The metallic starting materials are selected from the group consisting of Al, Ni, Ti, Cr, Mo, V, Zr and Ta, whereas the non-metallic starting materials are selected from the group consisting of Cr.sub.3 C.sub.2, WC, C, SiC, TiB.sub.2, CrB.sub.2, B.sub.4 C, TiC, VC, TiN and Si.sub.3 N.sub.4. In this manner, the metallic and non-metallic starting materials react exothermically during electric arc spraying to produce a hard substance.

REFERENCES:
patent: 3719519 (1973-03-01), Perugini
patent: 3881911 (1975-05-01), Cheney et al.
patent: 3973948 (1976-08-01), Laferty, Jr. et al.
patent: 3974245 (1976-08-01), Cheney et al.
patent: 4395279 (1983-07-01), Houck
patent: 4716019 (1987-12-01), Houck et al.
patent: 4724121 (1988-02-01), Weyand
"A Simplified Model for Atmospheric Arc Spraying", Second International Conference Surface Engineering, Jun. 1987, 16-18, Paper 39, By K. Busse et al.
"Hard Surface Composite Coatings Produced by Arc Spraying", Second International Conference Surface Engineering, 1987, Paper 22, By S. Harris et al.

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