Effects of Cubic Carbides and La Additions on WC Grain Morphology,Hardness and Toughness of WC-Co Alloys

摘要：

　　As an important component of the integrated research of the WC grain growth mechanism,effects of Cr3C2,VC and La2O3 additions on the WC grain morphology,hardness and toughness of WC-l0wt%Co alloys were investigated.To intensify the grain growth driving force,nano W and nano C,instead of the conventionally used WC,were used as the starting materials.To obtain a three-dimensional WC grain morphology,the natural sinter skins of the alloys were observed directly by scanning electron microscope.It is shown that the additions have a strong ability in regulating the WC grain morphological characteristics and grain size distribution characteristics and the combinations of hardness and toughness.Due to the formation of regular and homogeneous triangular platelet WC grains,WC-10wt% Co-0.6wt%Cr3C2-0.06wt%La2O3 alloy shows an excellent combination of hardness and toughness.The morphological regulation mechanism,the relationship between the WC grain morphology and the properties were discussed.

关键词： cemented carbide rare earth grain growth platelet WC grain hardness toughness

作者: Zhang Li Chen Shu Cheng Xin Wu Houping Ma Yun Xiong Xiangjun

作者单位: State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China Changsha Mining and Metallurgy Research Institute Co.,Ltd.,Changsha 410012,China

会议类型: 国际会议

会议名称: 2012 Zhuzhou International Conference on Cemented Carbides(株洲硬质合金国际学术会议)

会议地点: 株洲

会议语种:英文

页码: 130-136

在线出版日期: 2012-09-12（万方平台首次上网日期，不代表论文的发表时间）