Various cutting tool materials begin to lose their hardness at different temperatures.
不同的切削刀具材料在不同的温度点开始软化。
Wear resistance improves as cutting tool hardness increases.
切削刀具的硬度越高，耐磨性就越好。
Strength in cutting-tool material is not always proportional to hardness.
刀具材料的强度并不都是与硬度成正比的。
Strength in cutting-tool material is not always proportional to hardness.
刀具材料的强度并不都是与硬度成正比的。
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