The hardness gradient, depth, microstructure and phases of nitrided layers were measured with Microhardness Apparatus, Microcopy and X-ray diffractometer.
2
用光镜、扫描电镜、透射电镜和硬度计等手段分析并研究其表层变形层金相组织、晶粒尺寸及显微硬度。
The surface layers are characterized by means of optical microscope, TEM, SEM and micro-hardness testing machine.
3
采用金相显微镜和硬度计研究了多层熔覆对激光熔覆层微观组织和硬度的影响。
The influences of multilayer cladding on the microstructure and hardness of laser-clad layers were studied by metallographic microscope and hardometer.