40Cr2Ni4MoV钢残余奥氏体定量测定的两种方法比较  

Comparison of Two Methods for Quantitative Determination of Retained Austenite in 40Cr2Ni4MoV Steel

作　　者：李晓伟[1] 刘宗昌[1] 霍文霞[1] 张利文[1] 

机构地区：[1]内蒙古科技大学分析和测试中心,内蒙古包头014010

出　　处：《热加工工艺》2017年第22期242-244,248,共4页Hot Working Technology

基　　金：内蒙古大型科学仪器开放共享试点建设项目(20161706)

摘　　要：采用YB/T 5338-2006规定的方法和Rietveld全谱拟合方法分别对40Cr2Ni4Mo V钢淬火后650℃回火的残余奥氏体含量进行了定量分析,发现两种方法所得结果十分相近。分别用Cu靶和Co靶对40Cr2Ni4Mo V钢进行了步进衍射扫描。结果表明,Cu靶衍射谱吸收较大,Cu靶吸收因子为10.92583 cm^(-1),Co靶吸收因子为6.165727 cm^(-1),根据Cu靶衍射谱计算所得残余奥氏体含量较小。Rietveld全谱拟合方法具有准确、方便和快捷等优点,可作为用X射线衍射仪定量测定残余奥氏体的有益补充。The quantitative analysis of residual austenite content in 40Cr2Ni4MoV steel after quenching and tempering at 650 ~C was carried out by using the method of YB/T 5338-2006 and Rietveld full spectrum fitting method. It is found that the results obtained from the two methods are very similar. The step scanning of 40Cr2Ni4MoV steel was carried out by using Cu target and Co target respectively. The results show that the Cu target diffraction spectrum absorption is larger, the Cu target absorption factor is 10.92583 cm^-1, and the Co target absorption factor is 6.165727 cm^-1. The residual austenite content calculated by the Cu target diffraction spectrum is relatively small, gietveld full spectrum fitting method is accurate, convenient and quick, which can be used as a useful supplement for the quantitative determination of residual austenite by X-ray diffraction.

关 键 词：40Cr2Ni4MoV钢 残余奥氏体 Rietveld全谱拟合方法 

分 类 号：TG115.23[金属学及工艺—物理冶金]