WC—Co硬质合金的饱和磁化强度

Saturation Magnetization of WC-Co Cemented Carbides

探讨了ＷＣ－Ｃｏ硬质合金饱和磁化强度的影响因素、磁化机制和比饱和磁化强度４πσ与抗弯强度σ（ＴＲＳ）的关系。结果表明，影响ＷＣ－Ｃｏ合金４πσ的主要因素是γ相含量和γ相成分，其次是γ相结构。其４πσ同合金标称钴含量或合金碳含量间均不存在单一性对应关系。γ相分布和热处理及添加稀土元素对合金４πσ的影响，实质上仍归结为上述基本因素的作用。ＷＣ－Ｃｏ合金的４πσ同抗弯强度间并不存在明确的对应关系，因而难以用饱和磁化强度（Ｍｓ或４πσ）取代σ（ＴＲＳ）的测定。

he affecting factors on Ms and magnetizing mechanism of WC-Co cemented carbides are explored and the relationship of the specific saturation magnetization 4πσ with bending strength σ(TRS) is discussed. The results show that, the basic affecting factors on 47πσo f WC-Co alloy are the γ-phase fraction, the γ-phase composition and then the γ-phase structure in alloy. There is no single corresPOndence of 4πσ vs. carbon content or nominal Co content in alloy. Effect of the γ-phase distribution, the heat treatment and adding rare elements on 4πσ of WC-Co alloy are essentially attributed to above-mentioned basic affecting factors. There is no definite relationship of 4πσ vs. σ(TRS) of WC-Co alloy, so the σ(TRS) measurement can hard be replaced by Ms or 4πσ.