工具材料的切削性能,主要决定在它的红热性能;即是在高温之下,它还能保持它自己的机械性能的能力。隨时有较多的红热性質的新工具材料的出现,切削性能也就隨时得以提高。比如说有高速鋼及以後的硬質合金的出现,工具在接镯表面温度的增高便可以较炭素鋼增高2—4倍,相封的在切 The machinability of a tool material is primarily determined by its red-hot properties; that is, its ability to maintain its own mechanical properties at elevated temperatures. At any time there is more red hot nature of the emergence of new tool materials, cutting performance will be able to improve at any time. For example, there are high-speed steel and carbide after the emergence of the tool in the bracelet surface temperature can be increased 2-4 times higher than carbon steel,