系统地研究了铸铁材料在干滑动摩擦条件下的摩擦学特性。
The tribological characteristics of cast iron under dry sliding condition was systematically investigated.
文摘：系统地研究了铸铁材料在干滑动摩擦条件下的摩擦学特性。
Abstract: The tribological characteristics of cast iron under dry sliding condition was systematically investigated.
然而，在某些应用条件下，钛合金的硬度低，摩擦系数大，耐磨性差。
However, in some application conditions, low hardness, big friction coefficient and poor wear resistance confine its extensive application in engineering.
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