The experimental results show that the surface hardened layer consists of non-full transformation area which is adjacent to the base metal and surface full transformation area.

实验结果表明，合金铸铁光束表面相变硬化层由与基材相邻的不完全相变区及表面完全相变区组成。

youdao

Surface preparation of metal before chemical process. Removal of a layer of the base metal.

在化学处理之前的表面准备，移除一层金属基材。

youdao

Penetration performance in surface layer of concrete target was analyzed by stress wave damage theory, calculating method base on "simplified equivalent resistance line" was presented.

从应力波表层损伤理论分析了混凝土表层“开坑区”的侵彻特性，提出“简化等效阻力线”的计算方法；

youdao