基于激光诱导击穿光谱表征GCr15钢的硬度

利用激光诱导击穿光谱对GCr15钢不同温度回火后的光谱稳定性、特征谱线强度、等离子体温度和电子密度的变化趋势进行了分析,研究了特征谱线强度比、等离子体温度和硬度之间的关系。结果表明:不同温度回火后的样品的光谱特性和等离子体特性存在差异,但原子谱线强度均随回火温度的升高呈上升趋势,离子谱线强度均随回火温度升高呈下降趋势;特征谱线强度比和等离子体温度与样品的硬度均呈现出较好的正相关关系。表明GCr15钢热处理之后硬度可以通过激光诱导击穿光谱法测量。

Characterization of hardness for GCr15 steel based on laser-induced breakdown spectroscopy

Spectral stability, characteristic line intensity, plasma temperature and electron density of GCr15 steel after tempering at different temperatures were analyzed by using laser-induced breakdown spectroscopy method, and the relationships between characteristic line intensity ratio, plasma temperature and hardness were studied. The results show that the spectral and plasma characteristics of the specimens tempered at different temperatures are different, however, with the increase of tempering temperature, the atomic spectral line intensity increases, while the ion spectral line intensity decreases. Meanwhile, The characteristic line intensity ratio and plasma temperature have good positive correlation with the hardness of the specimens, which shows that the hardness of the GCr15 steel after heat treatment can be measured by laser-induced breakdown spectroscopy method.