Abstract：The composition and content of elements in steel had important influence on the quality and performance of steels. At present, the real-time and rapid determination of elements in steel were focused in steel industry. The feasibility of simultaneous and rapid analysis of multi-elements in steel using hand-held laser induced breakdown spectrometer (LIBS) was discussed. Three standard steel samples were tested. Cr (I) 520.84nm, Ni (I) 232.003nm, Mn (I) 403.075nm, Cu (I) 324.753nm and Si (I) 288.16nm were selected as the analytical lines. Fe (I) 373.486nm was used as the internal standard line. The precision and trueness of sample analysis of standard steel samples using hand-held LIBS were investigated. The verification test results showed that the accuracy was relatively high when hand-held LIBS was used for the rapid and quantitative analysis of four elements including Cr, Ni, Cu and Si. Although the quantitative analysis of Mn had certain system deviation, the results could basically reflect the elemental content. Some actual samples of various steel materials in daily life were randomly selected for rapid and quantitative analysis according to the experimental method. Meanwhile, the inductively coupled plasma atomic emission spectrometry (ICP-AES) method was employed for comparison. The linear trend diagrams of determined results by two methods were plotted and compared with the ideal trend line (y=x). The results indicated that the determination results of Cr, Ni, Cu and Si by LIBS were consistent with those obtained by ICP-AES. The results of Mn by LIBS were lower than those obtained by ICP-AES, but they showed good correlation relationship. In whole test process, the average analysis time for one set of data by hand-held LIBS was 5s. The proposed method was feasible for the rapid and quantitative analysis in steel industry.
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