添加Cr及Cr_3C_2对WC-(Co,Ni)硬质合金比饱和磁化强度的影响  

Effect of Cr and Cr_3C_2 addition on Magnetic Saturation of WC-(Co,Ni) Cemented Carbides

作　　者：王晓灵[1] 

机构地区：[1]自贡硬质合金有限责任公司成都分公司,四川成都610100

出　　处：《硬质合金》2011年第6期337-344,共8页Cemented Carbides

摘　　要：本文首先研究了WC-(Co,Ni)硬质合金渗碳时的比饱和磁化强度。然后以此为基础研究了添加Cr及Cr3C2对WC-(Co,Ni)硬质合金的比饱和磁化强度的影响。结果表明:WC-(Co,Ni)硬质合金在Ni/(Co+Ni)质量比不超过0.5时,渗碳时合金的比饱和磁化强度遵从加和原理,相对比饱和磁化强度接近100%。当Ni/(Co+Ni)质量比超过0.5后,渗碳时合金的相对比饱和磁化强度急剧下降,远低于100%。Cr和Cr3C2的添加对WC-(Co,Ni)硬质合金有显著影响,添加Cr和Cr3C2后的WC-(Co,Ni)合金的比饱和磁化强度不再符合原来的加和关系;Cr和Cr3C2的加入,显著减弱了合金的磁性,其程度与Cr在粘结相中的相对含量有关。The magnetic saturation of WC-（Co,Ni） cemented carbides,when carbon phase is existing in the microstructure,was studied by experiments.Then the effect of Cr and Cr3C2 addition on the magnetic saturation of WC-（Co,Ni） cemented carbides was investigated.The results show that the magnetic saturation obeys the additivity-law when the Ni/（Co＋Ni） value is not higher than 0.5,and the relative magnetic saturation is close to 100%.But the relative magnetic saturation drops suddenly to much lower than 100% when the nickel content in the binder excesses 50%（mass fraction）.The magnetic saturation is significantly minimized by the addition of Cr and Cr3C2,and it does not obey the additivity-law.The degree of magnetic saturation decrease is relative to the Ni/（Co＋Ni） value.

关 键 词：硬质合金 比饱和磁化强度 钴磁 CR Co+Ni粘结剂 相对磁饱和 

分 类 号：TG135.5[一般工业技术—材料科学与工程]