Powder mixtures for wear resistant facings and products...

Details Powder mixtures for wear resistant facings and products... Powder mixtures for wear resistant facings and products...

C - Chemistry, Metallurgy

04

B

117/226, 261/5

C04B 35/56 (2006.01) B23K 35/32 (2006.01) C23C 4/06 (2006.01) C23C 24/10 (2006.01)

Patent

CA 1195345

TITLE OF THE INVENTION POWDER MIXTURES FOR WEAR RESISTANT FACINGS AND PRODUCTS PRODUCED THEREFROM ABSTRACT OF THE DISCLOSURE 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.

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