Brazing alloy
AssigneeJohnson Matthey PLC
InventorsMieczyslaw Herman Sloboda, John Sidney Hatswell
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Abstract
This invention relates to brazing alloys suitable for use in the fabrication of cutting tools, for example, the brazing of a cutting tip to a shank of a rock drill. One particular brazing alloy in accordance with the invention comprises, apart from impurities, 15-40 wt.% zinc, 15-45 wt.% silver, 0.2-15 wt.% manganese, 0.2-10 wt.% nickel and balance copper.
Claims2
A brazing alloy consisting essentially of 33 wt.% zinc, 25 wt.% silver, 2 manganese, 2 wt.% nickel and 38 wt.% copper, said alloy melting in the range 710-810.degree. C. and being characterized by its resistance to cracking on cooling when used to braze the joint between a steel shank and carbide cutting tip of a rock drill.
A brazing alloy consisting essentially of 38 wt.% zinc, 2 wt.% manganese, 2 wt.% cobalt and 58 wt.% copper, said alloy melting in the range 890.degree.-930.degree. C. and being characterized by its resistance to cracking on cooling when used to braze the joint between a steel shank and carbide cutting tip of a rock drill.
Dependencies are inferred from the claim text.