Development of standard samples for quantitative analysis of carbon in bearing steel by electron probe micro analyzer
ZUO Xiaojian1, ZHAO Yina2, CHEN Yinli2
1. State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China; 2. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
Abstract：Electron probe microanalyzer can be used to accurately determine the carbon content (with mass fraction below 1%) in micro-area structure of steel by calibration curve method. At present, the standard samples for the establishment of calibration curve are usually Fe-C alloys, but the development and application of bearing steel standard samples are rarely reported. In the study, a group of bearing steel materials with different carbon contents (0.180%-0.94%) were prepared by vacuum melting. The stability and uniformity were quantitatively evaluated according to the national standard to obtain a group of standard samples for quantitative analysis of carbon in bearing steel by calibration curve method. The results showed that the stability and uniformity of prepared bearing steel materials could meet the requirements of national standard. The linear correlation coefficient of established calibration curve was 0.979 17, which was slightly lower than that of calibration curve established using Fe-C standard samples. However, its physicochemical property was closer to the actual steel products, so the measured results of carbon content were closer to the true values. The development of standard sample of bearing steal series provided basis for the accurate determination of carbon content in microstructure in future.
左晓剑, 赵宜娜, 陈银莉. 电子探针定量分析轴承钢中碳元素的标准样品研制[J]. 冶金分析, 2023, 43(1): 25-30.
ZUO Xiaojian, ZHAO Yina, CHEN Yinli. Development of standard samples for quantitative analysis of carbon in bearing steel by electron probe micro analyzer. , 2023, 43(1): 25-30.
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