超细晶硬质合金的制备  

Preparation of Ultra-fine Grained Hard Metals

作　　者：谢海根[1] 易丹青[1] 黄道远[1] 李荐[1] 刘刚 刘瑞[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]崇义章源钨制品有限公司,江西崇义341300

出　　处：《稀有金属与硬质合金》2007年第4期14-17,共4页Rare Metals and Cemented Carbides

摘　　要：以纳米WC粉末与超细钴粉为原料,采用行星球磨混料→压制成形→氢气脱胶→真空烧结工艺制备了WC-10Co超细晶硬质合金。研究表明,采用行星球磨混料获得的混合料分散均匀,颗粒细小且成形性好。采用该混合料在1 360℃下真空烧结制备的超细硬质合金其平均晶粒尺寸约0.34μm,抗弯强度3 100 MPa,硬度HV60为1 900,断裂韧性10.3 MPa.Superfine crystalline WC-IOCo hard metal is prepared from nano-meter WC and super fine Copowder by the process of planet ball milling-pressing-hydrogen degumming and vacuum sintering. The testresults show that the use of planet milling resulted in evenly distributed fine-grained mixture with goodcompactability. The superfine hard metal prepared by vacuum sintering has particle size about 0.34 μm,bending strength S 100 MPa,hardness 1 900 kg/mme ,fracture toughness 10. S MPa · m^1/2.

关 键 词：纳米 超细晶 硬质合金 WC粉 钴粉 

分 类 号：TF125.3[冶金工程—粉末冶金]