Recurring observation of characteristic region in steel among different devices
ZHANG Ke1,2, JIN Chuan-wei2, WU Yuan-yuan2
1. JITRI New Material R&D Co., Ltd., Suzhou 215100, China; 2. Institute of Research of Iron and Steel, Jiangsu Province and Sha Steel, Zhangjiagang 215625, China
Abstract：During the characterization of same characteristic region in steel using different devices, the problem of sample stage compatibility between different equipment will have influence on the recurring observation and testing. Through the coordinate transformation between devices and program interface display, the inclusions in steel were taken as the characteristic region, and the recurring observation and testing among different devices, including optical microscope (OM) and scanning electron microscope (SEM), SEM and nanoindenter, were demonstrated. The results indicated that the nano-indentation hardness of three types of inclusions in molten steel sample was as below: 0.14GPa, 8.83GPa and 8.01GPa for Al2O3 type, Si-Ca-O type and Si-O type, respectively. Meanwhile, based on the maximum allowable offsets at different magnifications and the arithmetic mean of coordinate deviation of characteristic point, the positioning error limit of this recurring observation technique was evaluated: the coordinate deviation was less than 33μm in the x direction and less than 55μm in the y direction. The positioning speed of characteristic region was fast and the position accuracy was high during equipment replacement. Moreover, it well matched with the moving ability of sample stage in equipment, which showed that the proposed method had good practicability and equipment versatility.
张珂, 金传伟, 吴园园. 钢中特征区域在不同设备间的重现观察[J]. 冶金分析, 2020, 40(9): 18-23.
ZHANG Ke, JIN Chuan-wei, WU Yuan-yuan. Recurring observation of characteristic region in steel among different devices. , 2020, 40(9): 18-23.
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