作者：董登超, 张珂, 吴园园, 胡显军

作者单位：江苏省(沙钢)钢铁研究院, 江苏张家港 215625

关键词：奥氏体不锈钢; 形变诱导马氏体; Rietveld全谱拟合法; 直接对比法; K值法;

摘要：

为准确测定304L奥氏体不锈钢中形变诱导马氏体的含量,更好地解释该材料中形变诱导马氏体相变机制,使用X射线衍射法对一系列形变后的奥氏体不锈钢样品进行研究,采用Rietveld全谱拟合法对各物相含量进行分析,并与传统的直接对比法、K值法进行比较,该法能最大限度克服传统方法的缺点。分析结果显示:304L奥氏体不锈钢形变过程中会发生,和马氏体相变,且低温形变会加速奥氏体不锈钢中奥氏体相向马氏体相的转变。

Determinate deformation-induced martensite content in 304L stainless steel with X-ray diffraction

DONG Deng-chao, ZHANG Ke, WU Yuan-yuan, HU Xian-jun

Institute of Research of Iron and Steel in Jiangsu Province, Sha-Steel Co., Ltd., Zhangjiagang 215625, China

Abstract: In order to accurately determinate the deformation-induced martensite content in 304L austenite stainless steel and better explain the phase transformation mechanism, XRD was employed to investigate a series of deformed samples, and Rietveld method was adopted to analyze the martensite content. And also the method was compared with the traditional direct comparison method and K-value method. It can be concluded that the defects of traditional methods could be modified by Rietveld method. The results show that γ-austenite would be transformed into α,-martensite and ε-martensite under deformation and lower temperature could accelerate the phase transformation.

Keywords: austenite stainless steel; deformation-induced martensite; Rietveld method; direct comparison method; K-value method

2014, 40(6): 31-34  收稿日期: 2014-3-19;收到修改稿日期: 2014-5-7

基金项目: 

作者简介: 董登超(1984-),男,贵州黔西县人,助理工程师,主要从事钢铁材料结构表征工作。

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