Rock bit with hardfacing material incorporating spherical...

Details Rock bit with hardfacing material incorporating spherical... Rock bit with hardfacing material incorporating spherical...

E - Fixed Constructions

21

B

E21B 10/08 (2006.01) B22F 1/00 (2006.01) B23K 35/32 (2006.01) C22C 29/08 (2006.01) C23C 30/00 (2006.01) E21B 10/50 (2006.01)

Patent

CA 2199780

An improved hardfacing for teeth and other surfaces of milled tooth rock bits comprises steel in the range of from 20 to 50 percent by weight, and filler in the range of from 50 to 80 percent by weight. The filler is comprises spherical cast tungsten carbide particles alone or in a mixture of other tungsten carbide particles such as crushed cast spherical or crushed cemented tungsten carbide, macrocrystalline tungsten carbide, or the like. The single crystal monotungsten tungsten carbide particles have a particle size in the range of from 16 to 40 mesh and/or in the range of from 80 to 200 mesh.

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