硬质合金的比矫顽磁力  

THE SPECIFIC COERCIVE FORCE OF CEMENTED CARBIDES

作　　者：刘寿荣[1] 郝建民[2] 褚连青[2] 

机构地区：[1]天津硬质合金研究所,天津300222 [2]天津电子材料研究所,天津300192

出　　处：《硬质合金》2000年第1期48-51,共4页Cemented Carbides

摘　　要：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。The quantitative relationships of the specific coercive force H SC (A·m 2/kg) of two-phase WC-Co cemented carbides with the carbon content X C(wt)、the real cobalt content X Co (wt)、the mean WC grain size L WC (μm) in alloy sample and the specific saturation magnetization 4πσ(A·m 2·kg -1 )、the density d(kg/m 3) were obtained by magnetic property method and XRD technique:H SC +0.3304lgL WC =7.652-0.3304lg1.791X Co /(1-1.087X Co )-7.356X Co -120.0X C=0.2958-0.3304/g1.791X Co /(1-1.087X Co )+6.488X Co -3.264×10 -3 4πσ=11.86-0.3304lg1.791X Co /(1-1.087X Co )+8.135X Co -1.083×10 5 d -1 . The H SC change of two-phase WC-Co alloy is mainly attributed to the change of the solid solutions of W and C in γ Phase resulted from the X C change in alloy sample and resulted in the magnetic moment change of γ-Phase and the lattice distortion stress change of Co-base lattice.

关 键 词：硬质合金 比矫顽磁力 

分 类 号：TF125[冶金工程—粉末冶金]