铸造技术2016，Vol.37Issue(7)：1432-1434,3.DOI:10.16410/j.issn1000-8365.2016.07.035
WC-Co硬质合金刀具的放电等离子热压烧结工艺与性能研究
Study on SPS Sintering Process and Properties of WC-Co Cemented Carbide
摘要
Abstract
The structure and properties of cemented carbide was studied by Archimedes method,scanning electron microscope,universal testing machine and Vivtorinox hardness test.The results show that with the increase of sintering temperature,the densification of WC cemented carbide is higher,and the grain growth is not uniform after the sintering temperature of 1 300 ℃.When the sintering temperature is below 1 300 ℃,the relative density increases significantly with the increase of sintering temperature.When the sintering temperature is above the 1300 ℃,the relative density is not changed.The flexural strength of WC cemented carbides increases first and then decreases with the increase of sintering temperature,and reaches 1 920 MPa at 1 300 ℃.The fracture toughness are 8.1 MPa ·m12 and 9.6 MPa·m12 at the sintering temperature of 1 200 ℃ and 1 250 ℃,respectively,and reaches to 10.4 MPa·m12 at the sintering temperature of 1 300 ℃.关键词
硬质合金/放点等离子热压烧结/显微组织/断裂韧性Key words
cemented carbide/spark plasma sintering (SPS)/microstructure/fracture toughness分类
金属材料引用本文复制引用
周俊平,董慧敏,李军..WC-Co硬质合金刀具的放电等离子热压烧结工艺与性能研究[J].铸造技术,2016,37(7):1432-1434,3.基金项目
河南省教育厅科学技术研究重点资助项目(14B460002) （14B460002）
