| 摘要 |
An improved, wear-resistant hand shear is provided having a cutting edge which is made of either: (a) 70% to 84% of tungsten carbide, and 30% to 15.5% of cobalt; or (b) 70% to 97% of tungsten carbide, and 3% to 30% of nickel; or (c) 94% to 99.9% of tungsten carbide and nickel taken together, the ratio of tungsten carbide to nickel being 0.70:0.30 to 0.97:0.03, and 0.1% to 6% of at least one of cobalt, titanium carbide, and tantalum carbide.
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