Hard facing material for rock bits

Details Hard facing material for rock bits Hard facing material for rock bits

E - Fixed Constructions

21

B

E21B 10/16 (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 2196494

An improved hard facing for teeth and other surfaces of milled tooth rock bits comprises steel in the range of from 18 to 32 percent by weight, and filler in the range of from 68 to 82 percent by weight. The filler is cemented tungsten carbide and cast tungsten carbide free, and includes greater than 95 percent by weight single crystal monotungsten carbide particles. The single crystal monotungsten carbide particles have a particle size in the range of from 200 to 500 mesh and, preferably in the range of from 200 to 325.

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