中低合金钢冲击断口表面的激光剥蚀电感耦合等离子体质谱原位统计分布分析

来源期刊：冶金分析2010年第6期

论文作者：袁良经 于雷 韩美 王海舟

文章页码：1 - 6

关键词：冲击断口； 激光剥蚀-电感耦合等离子体质谱； 原位统计分布分析； 小样品非连续异形面

Key words：impact fracture； laser ablation inductively coupled plasma mass spectrometry； original position statistic distribution analysis； mini-sized irregular-shaped materials

摘    要：通过钢材冲击断口表面的成分分布结果分析影响材料冲击性能的原因,对材料研究具有重要意义。本文提出了小样品非连续异形面的原位统计分布分析表征方法,以激光剥蚀电感耦合等离子体质谱法(LA-ICP-MS)获得中低合金钢冲击断口表面的元素含量信息,运用统计分析方法得到断口表面B、Al、P、S、Mn、Ti、V、Co、Cu、Nb等元素的位置分布、统计偏析度、最大偏析度。结果表明,Mn在样品断口表面中部区域存在着较为严重的偏析,统计偏析度高达19.50。通常认为元素的严重偏析必定伴随着夹杂物的聚集,因此由所建立的LA-ICP-MS原位统计分布分析方法得出的Mn存在较为严重的正偏析结果,与扫描电镜分析得到的Mn夹杂物含量偏高的结论具有较好的一致性。

Abstract: It was of great significance for material research to analyze the facters influencing the impact property of material by component distribution analysis of steel impact fracture surface. A new method was proposed for characterizing the original statistic distribution in mini-sized irregular-shaped materials in this paper. The content information of elements on the medium and low alloy steel impact fracture surface was obtained by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and the position distribution, the statistic segregation degree and the maximum segregation degree of B, Al, P, S, Mn, Ti, V, Co, Cu and Nb were obtained by statistic analysis method. The statistical data showed that there was serious segregation of Mn in the middle zone of sample fracture surface with statistic segregation degree up to 19.50. It was generally considered that serious segregation of element would accompany with congregation of inclusions. Therefore, the results about the serious positive segregation of Mn which was obtained by the established LA-ICP-MS original position statistic distribution analysis method accorded well with the conclusion on the high content of Mn inclusions by SEM analysis.