淬硬表层 meaning in Chinese

hardened skin
hardened surface

Abstract : this paper discussed the physicalmetallurgical process during laser hardening withsteel and cast iron , presented the technique designprinciple of laser hardening to achieve good resultsit also introduced the inspection method for laserhardened surface of steel and cast iron
文摘:讨论了钢和铸铁在激光表面淬硬时的物理冶金学过程，提出了激光淬硬获得优良效果的工艺设计依据，介绍了对钢铁零件激光淬硬表层的检验方法。