An analytical function for describing hardness distribution in round section of quenched steel, known as U-curve, has been established.
建立了描述淬火钢圆形截面硬度分布曲线——U曲线的解析函数表达式。
Section emphases:mechanics nature of rock and the affecting factor, hardness and plasticity evaluation and its application.
本节重点：岩石的力学性质及其影响因素，硬度与塑性的评价及其应用。
The cross section micro hardness of the material changes continuously.
材料横截面显微硬度连续变化。
The effects of instant stream inoculation process on the microstructure and section sensitivity of WD615 flywheel were investigated by using metallurgical microscope and Brinell hardness tester.
利用金相显微镜、布氏硬度计分析了随流孕育处理对WD 615飞轮金相组织和断面敏感性的影响。
Cross section of the coatings was observed by metallurgical microscopy. Hardness of the coatings was tested by micro-hardness tester.
采用光学金相显微镜观察涂层断面的形貌，通过显微硬度计测试涂层的显微硬度。
Cross section of the coatings was observed by metallurgical microscopy. Hardness of the coatings was tested by micro-hardness tester.
采用光学金相显微镜观察涂层断面的形貌，通过显微硬度计测试涂层的显微硬度。
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