Abstract：In previous studies of precipitated phases, the composition, quantity and size are usually obtained by transmission electron microscope (TEM), which is difficult to realize the automatic statistical analysis of precipitated phases. In order to achieve the automatic statistical analysis, the field emission scanning electron microscopy (FE-SEM) and feature function in energy spectrum analysis software were used to systemically study the precipitated phases in steel. Particularly, the main influencing factors in proposed method such as sample preparation, microstructure type, precipitated phases, setting and selection of parameters were analyzed in detail. The results indicated that the optimum experimental conditions were listed as follows:the chemical etching, magnification of 10000, threshold value of 110-255 and maximum total analysis area of 0.1mm2. Considering the influence of instrument resolution, the proposed experimental method was only suitable for statistical analysis of precipitated phase larger than 50nm. According to the experimental results of 700L steel, the precipitated phase was composed of titanium carbonitride and titanium carbonitride-niobium carbonitride with proportion of 58% and 42%, respectively. The precipitated phases with size in range of 50-200nm were dominant.
崔桂彬, 鞠新华, 严春莲, 郝京丽, 杨瑞. 钢中析出相场发射扫描电镜的自动统计分析技术研究[J]. 冶金分析, 2019, 39(2): 17-22.
CUI Gui-bin, JU Xin-hua, YAN Chun-lian, HAO Jing-li, YANG Rui. Study on automatic statistical analysis technology of precipitated phases in steel by field emission scanning electron microscope. , 2019, 39(2): 17-22.
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