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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。
In this paper, the specific saturation magnetization of WC- (Co, Ni) cemented carbide during carburizing was first studied. Based on this, the effect of adding Cr and Cr3C2 on the specific saturation magnetization of WC- (Co, Ni) cemented carbide was also studied. The results show that the specific saturation magnetization of WC- (Co, Ni) cemented carbides follows the principle of addition when the mass ratio of Ni / (Co + Ni) is less than 0.5. The relative saturation magnetization is close to 100% . When the mass ratio of Ni / (Co + Ni) exceeds 0.5, the relative saturation magnetization of the alloy decreases sharply, far below 100%. The addition of Cr and Cr3C2 has a significant effect on the WC- (Co, Ni) cemented carbide. The specific saturation magnetization of the WC- (Co, Ni) alloy added with Cr and Cr3C2 no longer accorded with the original additive relationship. Cr and The addition of Cr3C2 significantly weakens the magnetism of the alloy, which is related to the relative content of Cr in the binder phase.