Sheng Liang, Yang Zhigang, Wang Hui, Li Baibing, Zhang Xiaofen, Jia Yunhai
Beijing Advanced Innovation Center for Materials Genome Engineering, Central Iron and Steel Research Institute, Beijing, 100081, China.
NCS Testing Technology Co., Ltd., Beijing, 100081, China.
Heliyon. 2023 Jun 9;9(6):e17165. doi: 10.1016/j.heliyon.2023.e17165. eCollection 2023 Jun.
The presence of Ti-inclusions has a significant impact on the fatigue life of bearing steel. Laser-induced breakdown spectroscopy (LIBS) is a useful tool for analyzing Ti-inclusions, despite the fact that the effective excitation area of LIBS is actually larger than the pre-set spot diameter. The area affected by the LIBS spot ranges from 150 μm to 376.6 μm. A new parameter L has been introduced for better understanding the characterization of Ti-inclusions detected in SEM-EDS and LIBS measurements, When the L threshold falls below the value of 188.3 μm, the SEM-EDS and LIBS data are obtained from the same Ti-inclusion. The study demonstrates that there is a linear relationship between LIBS intensity and Ti-inclusions area, which was tested both theoretically and practically. The analysis of six samples of rolling GCr15 bearing steel with a Cr element content of 1.5% shows that one regression line is enough for analyzing the same type of inclusion processed under the same conditions. This method can significantly reduce the workload and analysis time during the actual analysis process.
钛夹杂物的存在对轴承钢的疲劳寿命有重大影响。激光诱导击穿光谱法（LIBS）是分析钛夹杂物的一种有用工具，尽管LIBS的有效激发面积实际上大于预设光斑直径。受LIBS光斑影响的面积范围为150μm至376.6μm。为了更好地理解在扫描电子显微镜-能谱仪（SEM-EDS）和LIBS测量中检测到的钛夹杂物的特性，引入了一个新参数L。当L阈值低于188.3μm时，SEM-EDS和LIBS数据来自同一个钛夹杂物。研究表明，LIBS强度与钛夹杂物面积之间存在线性关系，这在理论和实践上都得到了验证。对六个铬元素含量为1.5%的GCr15滚动轴承钢样品的分析表明，一条回归线足以分析在相同条件下处理的同一类型夹杂物。该方法可显著减少实际分析过程中的工作量和分析时间。
