Substantially silver free brazing alloys

Details Substantially silver free brazing alloys Substantially silver free brazing alloys

C - Chemistry, Metallurgy

22

C

75/7.1

C22C 30/06 (2006.01) E21B 10/00 (2006.01)

Patent

CA 1076395

ABSTRACT OF THE DISCLOSURE Substantially silver-free brazing alloys are provided which are suitable for use in the fabrication of cutting tools, for example, the braz- ing of a cutting tip to a shank of a rock drill. One particular substantially silver-free brazing alloy in accordance with an aspect of this invention com- prises, apart from impurities, 10-45 wt.% zinc, 0.2-.5 wt.% manganese; 0,2- 10 wt.% nickel; 0.2-10 wt.% cobalt; and balance copper. This substantially silver-free brazing alloy possesses the ability to wet steel (the shank material) and a cobalt-bonded tungsten carbide (the cutting tip material) while being metallurgically compatible with both these materials.

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