无损鉴定WC-Co硬质合金成分的物理基础  

Physical Basis of Nondestructive Evaluation on Composition in Cemented Carbides WC-Co

作　　者：刘寿荣[1] 

机构地区：[1]天津硬质合金研究所,天津300222

出　　处：《理化检验（物理分册）》2013年第9期568-575,共8页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：γ相磁性分析法是基于WC-Co硬质合金的磁性源自合金中γ粘结相的磁性,通过理论计算结合试验数据分析得到了γ相比饱和磁矩与γ相中钨和碳溶质质量分数的数值关系,以及合金的比饱和磁矩和密度分别与合金的钴含量或碳含量的数值关系。结果表明:钨和碳溶质分别降低和提高γ相的比饱和磁矩;除石墨相区内比饱和磁矩与合金的钴含量存在正比关系外,WC-Co合金的比饱和磁矩和密度分别与合金的钴含量或碳含量间均不存在一一对应关系,兼用合金的比饱和磁矩和密度测定值能确定WC-Co硬质合金材料成分的平均值。讨论了相关磁学测定量的物理意义。The numerical relationship of the specific saturation magnetic moment σ of y-phase with the wolfram soluhility Wyw and the carbon solubility Wyc in y phase, and the numerical relationship of the specific saturation magnetic moment 0＂, the density p of WC-Co alloy with the cobalt content We,, or the carbon content Wc in the alloy were deduced by means of theoretical analysis and experimental datum calculation based on the magnetism of the alloy was of the ）＇-phase magnetism origin i. e. the y phase magnetism analytics method. The results showed that, the specific saturation magnetic moment σy of y-phase could be raised by carbon solute and reduced by wolfram solute respectively. There was no one to one correspondence of the specific saturation magnetic moment σ （or the saturation magnetization Ms） and the density p with the cobalt content Wco or carbon content Wc in WCCo alloy respectively, except for the direct proportion relationship of σ with Wco in graphite composition region. The composition average value in WC-Co alloy could he decided exactly with both the measured specific saturation magnetic moment σ and the density p values of the alloy. The physical meaning of the related magnetic measurands were discussed.

关 键 词：硬质合金 成分 γ相磁性分析法 比磁饱和 比饱和磁矩 

分 类 号：TG113.225[金属学及工艺—物理冶金] TF125.3[金属学及工艺—金属学]