基于X射线显微CT的合金钢中夹杂物的定量三维表征  

Three-dimensional characterization of inclusions in alloy steelusing X-ray micro-CT computer tomo-graphy

作　　者：孙飞 蒙庚龙 田力男 李秋蒙 李囡 刘珑 SUN Fei;MENG Genglong;TIAN Linan;LI Qiumeng;LI Nan;LIU Long(School of Mechanical&Automotive Engineering Shandong Analysis and Test Center,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;Engineering Research Center of Failure Analysis and Safety Assessment,Shandong Analysis and Test Center,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China)

机构地区：[1]齐鲁工业大学(山东省科学院)机械工程学院,山东济南250014 [2]齐鲁工业大学(山东省科学院)山东省分析测试中心,山东省材料失效分析与安全评估工程技术研究中心,山东济南250014

出　　处：《山东科学》2023年第3期53-59,共7页Shandong Science

基　　金：国家自然科学基金(12075127)。

摘　　要：夹杂物对钢铁的疲劳强度以及疲劳寿命均会产生影响,但是大块试样中的夹杂物情况无法直接用X射线显微计算机断层扫描(X射线显微CT)进行精确成像。为实现对大块试样中夹杂物的三维特征观察,采用非水溶液电解的方法获取大块试样中的夹杂物,利用扫描电镜对电解后的夹杂物进行观察和分析,将夹杂物聚合成为圆柱形样品,最后采用X射线显微CT对夹杂物进行三维扫描,得到了大块试样中夹杂物的三维信息,并对夹杂物的各项尺寸数据进行统计分析。该研究为获取大块钢铁试样中夹杂物的三维形貌提供了新思路。Inclusions have an impact on the fatigue strength and fatigue life of steel,but inclusions in large samples cannot be accurately imaged using X-ray micro computer tomo-graphy(X-ray micro-CT).This study provides a novel approach to obtain the three-dimensional morphology of inclusions in large steel samples.To realize the three-dimensional features of inclusions in large alloy samples,this study used a nonaqueous electrolysis method to obtain inclusions;then scanning electron microscopy was performed to observe and analyze the electrolyzed inclusions.Furthermore,the electrolyzed inclusions were aggregated into cylindrical samples and finally scanned with X-ray micro-CT to obtain their three-dimensional information,and the obtained dimensional data of the inclusions were statistically analyzed.

关 键 词：夹杂物 显微计算机断层扫描 扫描电镜 非水溶液电解 

分 类 号：TG142.1[一般工业技术—材料科学与工程]