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用磁性法和 X射线衍射相分析得出了当两相 WC— Co硬质合金碳含量改变时 ,其比矫顽磁力 Hsc( A· m2 · Kg- 1)同合金碳含量 Xc、真实钴含量 XCo( wt)、WC相平均晶粒尺寸 Lwc( μm)及比饱和磁化强度 4πσ( A·m2 · kg- 1)、密度 d( Kg· m- 3)间的定量关系式Hsc+ 0 .330 4 lg L wc=7.652 - 0 .330 4 lg 1 .791 XCo1 - 1 .0 87XCo- 7.356XCo- 1 2 0 .0 Xc=0 .2 958- 0 .330 4 lg 1 .791 XCo1 - 1 .0 87XCo+ 6.488XCo- 3.2 64× 1 0 - 34 πσ=1 1 .86- 0 .330 4 lg 1 .791 XCo1 - 1 .0 87XCo+ 8.1 35XCo- 1 .0 83× 1 0 5· d- 1当合金碳含量变化时 ,溶质钨和碳在 γ相中固溶度的变化引起 γ相磁矩和 γ基体钴晶格畸变应力的改变是导致合金 Hsc值变化的主要原因。
When the carbon content of two-phase WC-Co cemented carbide changed, the specific coercivity Hsc (A · m2 · Kg-1) and the alloying carbon content Xc, the real cobalt content The quantitative relationship between XCo (wt), WC average grain size Lwc (μm) and specific saturation magnetization 4πσ (A · m2 · kg-1) and density d (Kg · m-3) lg L wc = 7.652 - 0.330 4 lg 1.791 XCo1 - 1.07XCo- 7.356XCo- 1 2.0 0 .0 Xc = 0 .2 958-0.330 4 lg 1.791 XCo1-1.0 87XCo + 6.488XCo- 3.2 64 × 1 0 - 34 πσ = 1 1.86-0.330 4 lg 1.791 XCo1-1.07XCo + 8.1 35XCo- 1.03 × 10-5 · d-1 When the alloy carbon content The main reason for the change of the Hsc value of the alloy is the change of the γ phase magnetic moment and the distortion stress of the γ matrix cobalt lattice due to the change of the solid solubility of the solute tungsten and carbon in the γ phase.