Method of surface hardening titanium and other metals

Details Method of surface hardening titanium and other metals Method of surface hardening titanium and other metals

1989-05-18

1992-09-08

Kastler, Scott

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148902, 148668, 148669, 148672, 148673, C21D 900

Patent

active

051455307

ABSTRACT:
A method of hardening the surface of titanium and its alloys, and other structural metals which form hard carbides, by treating the surface thereof with a moving, discontinuous carbon arc.
The metal surface to be hardened, and a carbon electrode are made opposite poles of an electric current source, and moved and/or rotated with respect to each other so that a multiplicity of discontinuous electric arcs are produced between the carbon electrode and the metal surface.
Carbon particles transfer through the arc and alloy within craters of the instantly liquified and chilled substrate, producing a surface layer which, in the case of titanium, is hard and tough and adherent enough to form the working surface of abrasive cutting tools.
The process improves the appearance and durability of consumer items and reduces friction and wear on machine parts.

REFERENCES:
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Rocklin Mfg. Co., Sales literature, p. 3, Dec. 1988.
Linnert, Welding Metallurgy, A. W. S. Dec. 1965, pp.382-385, Carbon Arc Welding.
Coes, Abrasives pp. 115-119, Dec. 1988.
Jefferson, Welding Encyclopedia Dec. 1974, pp.A66-67.
Barksdale, Titanium, 2nd Edition, Dec. 1966, pp. 107-109, 115-118, 598-601.
Sacks, Welding:Principles & Practice, p. 235, p. 263, Dec. 1988.
Metals Handbook, A. S. M. 9th ed. vol. 6, pp.799-803, "Laser Melt/Particle Injection", & references, Dec. 1987.
International Aerospace Abstracts 3928 Category 26, A88-53978, Dec. 1988, Comp & Structure, Alum. Alloys produced by microarc oxidation, (Rus.).

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