激光诱导击穿光谱分析钢中酸不溶铝含量

发布时间：2018-05-15 05:10

本文选题：激光诱导击穿光谱 + 酸不溶铝　；参考：《光谱学与光谱分析》2015年03期

【摘要】：激光诱导击穿光谱(LIBS)具有分析速度快、非接触测量、表面微区分析以及易于实现在线实时监控分析等优点。通过LIBS对块状钢铁样品表面进行扫描分析,实现了钢中酸不溶铝含量的定量表征。铝的异常信号采用Nalimov迭代法剔除,以剩余信号强度的平均值加三倍标准偏差作为阈值强度,高于阈值强度的信号认为由酸不溶铝产生,反之由酸溶铝产生。在用含量校准曲线获得钢中总铝的含量后,分别根据酸不溶铝信号总强度或信号总个数与总铝信号之比,计算钢中酸不溶铝的含量。几种钢铁标准样品及实际生产板坯样品中酸不溶铝含量的对比分析结果表明,根据铝信号总强度获得的分析结果与传统湿法分析结果吻合得更好,可用于快速定量表征钢中酸不溶铝的含量。
[Abstract]:Laser induced breakdown spectroscopy (LIBS) has the advantages of fast analysis, non-contact measurement, surface microanalysis and on-line real-time monitoring and analysis. The surface of bulk iron and steel samples were scanned by LIBS, and the quantitative characterization of acid insoluble aluminum content in steel was realized. The abnormal signal of aluminum is eliminated by Nalimov iterative method. The average value of residual signal strength plus three times standard deviation is taken as the threshold strength. The signal above the threshold strength is considered to be produced by acid-insoluble aluminum, whereas acid-soluble aluminum. After the content of total aluminum in steel was obtained by the calibration curve, the content of acid-insoluble aluminum in steel was calculated according to the total signal intensity or the ratio of the total signal number to the total aluminum signal. The results of comparison and analysis of acid insoluble aluminum content in several steel standard samples and actual slab samples show that the results obtained from the total strength of aluminum signal are in better agreement with those obtained by traditional wet method. It can be used to rapidly and quantitatively characterize the content of acid insoluble aluminum in steel.
【作者单位】：钢铁研究总院;清华大学材料学院;
【基金】：国家重大科学仪器设备开发专项项目(2011YQ140147)资助
【分类号】：O657.38;TG115.33

【共引文献】