低温低压烧结WC-8Co硬质合金  

Sintering WC-8Co Cemented Carbides at Lower Temperature and Pressure

作　　者：孙青竹[1] 陈洪生[2] 冯可芹[2] 王海波[1,2] 郭智兴[2] 熊计[2] 

机构地区：[1]攀枝花学院材料工程学院,四川攀枝花617000 [2]四川大学制造科学与工程学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2013年第3期140-145,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：四川省科技支撑计划资助项目(13ZC2133);成都市科技计划资助项目(10GGZD080GX-268;11DXYB096JH-027)

摘　　要：采用低温低压烧结WC-8Co硬质合金,并研究了烧结温度和烧结压力对硬质合金组织和性能的影响。研究结果表明:随着烧结温度的升高,WC-8Co硬质合金的孔隙减少,晶粒尺寸和密度增大;硬质合金的硬度与抗弯强度随着密度的增大而提高。当烧结温度高于1 280℃时,WC-8Co硬质合金的烧结方式为液相烧结;烧结压力有利于硬质合金的致密化。当烧结温度为1 300℃,烧结压力为5 MPa时,WC-8Co硬质合金的密度、硬度和抗弯强度分别为14.61 g/cm3、90.7 HRA和1 830 MPa。The WC -8Co cemented carbides were sintered at low temperature and pressure. The influences of sintering temperature and pressure on the microstructure and properties of the cemented carbides were investigated. Results showed that with the increase of sintering temperature, the quantity of pores decreases, the grain size and density of the cemented carbides increase simultaneously. The hardness and bending strength of the cemented carbides are improved with the increase of density. When the sinteriug temperature is a- bove 1 280℃＇, the sintering method of the cemented carbides is liquid-phase sintering. The improvement of density is contributed to the sintering pressure . When the sintering temperature is 1 300℃ and the sintering pressure is 5 MPa, the density, hardness and bending strength of the cemented carbides are 14.61 g/em3, 90.7 HRA and 1 830 MPa, respectively.

关 键 词：硬质合金 烧结 低温低压 

分 类 号：TF125.3[冶金工程—粉末冶金]