Wear resistant facings for couplings

Details Wear resistant facings for couplings Wear resistant facings for couplings

1984-04-05

1987-05-19

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

175374, 75252, B32B 1500

Patent

active

046667970

ABSTRACT:
This invention relates to mixtures of tungsten carbide, niobium metal, and molybdenum metal powders for use in the hardfacing of drill pipe couplings used in earth boring operations. It has been found that the addition of small amounts of niobium metal alone, or in combination with molybdenum, are effective to substantially submerge the tungsten carbide particles in the weld pool produced during hardfacing while, also, minimizing the occurrence of cracks which may be produced as the weld pool freezes.

REFERENCES:
patent: 3329487 (1967-07-01), Sowko et al.
patent: 3334975 (1967-08-01), Quaas et al.
patent: 3379503 (1968-04-01), McKenna
patent: 3539307 (1970-11-01), Baumel
patent: 3768984 (1973-10-01), Foster, Jr.
patent: 3800891 (1974-04-01), White et al.
patent: 3989554 (1976-11-01), Wisler
patent: 4043807 (1977-08-01), Kirman
patent: 4110514 (1978-08-01), Nicholson
patent: 4228339 (1980-10-01), Scales
patent: 4243727 (1981-01-01), Wisler et al.
Chemical Abstracts; vol. 77, 1972, p. 232; No. 91817a.

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