摘要
以液相复合-连续还原碳化方法制备的纳米复合WC-6Co粉末为原料,采用放电等离子烧结(SPS),制取了超细硬质合金。利用扫描电镜、维氏硬度仪、洛氏硬度仪、密度测试仪、MTS陶瓷测试系统等,观察烧结体显微结构,测试其硬度、密度、断裂强度、矫顽磁力、磁饱和度。结果表明采用放电等离子烧结获得的烧结体的硬度HV1≥19500MPa,断裂强度TRS≥2800MPa,平均晶粒度150nm^300nm。制备了高强度、高硬度的超细WC-6Co硬质合金。
Nanocrystalline WC-6Co composite powder that was produced by spray thermal decomposition-continuous and carbonization technology was used as raw material, and this paper adopted spark plasma sintering technology to prepare ultrafine cemented carbide. The microstructure, grain size, porosity, Vickers hardeness, density and Rockwell a hardness （HRA）, transverse rupture strength （TRS）, magnetic saturation induction and magnetic coercivity were studied. The results show that grain of specimen that was prepared by spark plasma sintering technology is 150 nm～300 nm, transverse rupture strength （TRS） is more than 2800 MPa, and Vickers hardness of specimen is more than 19500 MPa. Ultrafine cemented carbide with high strength and high hardness is obtained.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第8期1283-1286,共4页
Rare Metal Materials and Engineering
基金
中国博士后科学基金(2003034504)
武汉理工大学材料复合新技术国家重点实验室开放基金项目(2004-2005)
国家863纳米材料专项(2002AA302504)
武汉理工大学校基金(2003XJJ202)资助
