通过成分分析（EPMA）和硬度测试， 分析了硅扩散层的特征。
The characteristics of so-called silicon diffusion layer were analyzed through EPMA and hardness test.
利用异种钢接头的金相观察和硬度测试结果，验证了所得结论的正确性。
The correctness of those conclusions is proved by theresults of metallographic observations and hardness tests of the dissimilar steel welded joint ofCr30Ni9/high carbon steel.
通过潜油电机轴的微观金相组织观察和硬度测试， 分析了三种电机轴的组织结构和性能特点。
The micro-structure and the hardness of the submersible electro-motor shaft were analyzed and tested, and the performance of the electro-motor shaft was investigated.
应用推荐