耐磨钢X射线法残余应力测量值的函数拟合  

Function fitting of residual stress measured value by X-ray diffraction for wear resistance steel

作　　者：潘进 赵楠 刘天武 孙力 丁文红 罗扬 PAN Jin;ZHAO Nan;LIU Tianwu;SUN Li;DING Wenhong;LUO Yang(HBIS Materials Technology Research Institute,Shijiazhuang 050023,China;College of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]河钢材料技术研究院,河北石家庄050023 [2]武汉科技大学材料与冶金学院,湖北武汉430081

出　　处：《物理测试》2022年第6期23-29,共7页Physics Examination and Testing

基　　金：河北省高端钢铁冶金联合基金项目(E2019318022)。

摘　　要：结合弹性力学理论及X射线法(XRD)残余应力检测方法的基本原理论证了不同角度残余应力的XRD检测结果随角度变化遵循余弦函数的分布形式。针对在线淬火的耐磨钢产品采用XRD法进行表面多个角度的残余应力检测,采用不同的寻峰方法获得不同的残余应力计算结果。通过余弦函数拟合的方式对不同测量值的准确性进行验证,发现采用修正后极大值法获得残余应力的拟合效果最佳。根据拟合结果获得该点处完整的平面残余应力状态。Combining with the elastic mechanic theory and the basic principle of detection method for residual stress by X-ray diffraction(XRD), it was proved that the XRD measurement results of residual stress at various angles followed the distribution form of cosine function. The residual stress of wear resistance steel products under on-line quenching was detected by XRD with multi-angle surfaces. The different calculation results of residual stress were obtained using different peak searching methods. The accuracy of different measured values was verified by cosine function fitting, and it was found that the residual stress modified by maximum method had the best fitting effect. The complete plane residual stress state at this point could be obtained according to the fitting results.

关 键 词：X射线法(XRD) 平面应力状态 寻峰方法 函数拟合 应力莫尔圆 

分 类 号：TG142.72[一般工业技术—材料科学与工程]