Laser-induced breakdown spectroscopy applications in the steel industry: Rapid analysis of segregation and decarburization
Laser-induced breakdown spectroscopy applications in the steel industry: Rapid analysis of segregation and decarburization
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DOI：
10.1016/j.sab.2008.08.014
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发表时间：
2008-10-01
影响因子：
3.3
通讯作者：
Boue-Bigne, Fabienne
中科院分区：
文献类型：
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作者：
Boue-Bigne, Fabienne
快速化学分析日益成为炼钢行业的先决条件，无论是检查钢铁产品是否符合客户的规格，还是调查是否存在可能导致产品机械性能失效的缺陷。常规用于评估的方法。例如，通过对抛光表面进行化学蚀刻，然后进行光学观察来监测脱碳和偏析，往往相对快速、简单，并且适用于大样本区域；然而，获得的信息仅限于缺陷的空间范围。其他技术，例如电子探针显微镜和扫描电子显微镜 - 能量色散 X 射线，可用于在微观尺度上提供详细的化学成分，以便更好地理解所涉及的机制：然而，它们的用途仅限于分析相对非常小的样品区域（通常为几毫米（2））。在微观尺度上快速生成化学浓度图的能力是其众多积极属性之一 激光诱导击穿光谱 (LIBS) 的技术使其成为钢铁行业实验室或近线分析设施的有用工具。确定并优化了影响大样本区域详细绘图的参数。对显示偏析和脱碳的样品进行 LIBS 扫描测量。对于偏析样品，在 35 分钟内测量步长为 50 μm 的 60 x 60 mm(2) 区域，在脱碳样品上测量步长为 20 μm 的 4 x 1 mm(2) 区域，在 2 分钟内测量。由此产生的量化元素图与传统使用方法的数据非常相关。 在上面的两个例子中，LIBS 作为一种微分析技术的应用被证明可以带来非常有价值的信息，这是以前使用其他技术无法在如此短的时间内在如此大的面积上获得的。 (C) 2008 Elsevier B.V. 保留所有权利。
Rapid chemical analysis is increasingly a prerequisite in the steel making industry, either to check that a steel product complies with customers' specifications, or to investigate the presence of defects that may lead to mechanical property failure of the product. Methods conventionally used for assessment. such as the monitoring of decarburization and segregation, performed by chemical etching of a polished surface followed by optical observation, tend to be relatively fast, simple and applicable to large sample areas; however, the information obtained is limited to the spatial extent of the defect. Other techniques, such as electron probe microscopy and scanning electron microscopy - energy dispersive X-ray, can be used for providing detailed chemical composition at the micro-scale, for a better understanding of the mechanisms involved: however, their use is limited to analyzing comparatively very small sample areas (typically a few mm(2)).The ability to rapidly generate chemical concentration maps at the micro-scale is one of the many positive attributes of laser-induced breakdown spectroscopy (LIBS) that makes it a useful tool for the steel industry as a laboratory or near-the-line analysis facility. Parameters that influence the detailed mapping of large sample areas were determined and optimized. LIBS scanning measurements were performed on samples displaying segregation and decarburization. A 60 x 60 mm(2) area, with a step size of 50 mu m, was measured in 35 min on segregation samples, and a 4 x 1 mm(2) area with a step size of 20 mu m in 2 min on a decarburization sample. The resulting quantified elemental maps correlated very well with data from the methods used conventionally.In the two examples above, the application of LIBS as a micro-analysis technique proved to bring very valuable information that was not accessible previously with other techniques on such large areas in such a short time. (C) 2008 Elsevier B.V. All rights reserved.