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TiCN的添加对WC-Co硬质合金性能的影响
          
Effect of TiCN Addition on Properties of WC-Co Cemented Carbide

摘    要
采用粉末冶金+高温液相烧结制备得到TiCN含量(质量分数)分别为0,0.5%,1.0%,1.5%,2.0%的WC-Co硬质合金,研究了TiCN含量对该硬质合金微观形貌、致密性能和力学性能的影响。结果表明:当TiCN含量不大于1.0%时,硬质合金的晶粒尺寸分布均匀,孔隙、微裂缝和杂质偏析等缺陷相对较少,而大于1.0%时,缺陷数量增多,缺陷尺寸变大;随TiCN含量的增加,硬质合金的致密性能降低,维氏硬度先增大后减小,抗弯强度和断裂韧度均先降低后略有增大再降低;当TiCN含量为1.0%时,硬质合金的综合性能最佳。
标    签 TiCN   WC-Co硬质合金   液相烧结   力学性能   TiCN   WC-Co cemented carbide   liquid sintering   mechanical property  
 
Abstract
WC-Co cemented carbides were prepared by powder metallurgy and high temperature liquid sintering with TiCN content of 0,0.5wt%,1.0wt%,1.5wt%,2.0wt%, respectively. The effects of TiCN content on the micromorphology, densification performance and mechanical properties of the cemented carbide were studied. The results show that when TiCN content was no more than 1.0wt%, the grain size of the cemented carbide distributed evenly and less defects such as holes, microcracks and impurity segregation were observed; when higher than 1.0wt%, the amount of defects increased and the size bacame larger. With the increase of TiCN content, the densification performance of the cemented carbide decreased; the Vickers hardness increased and then decreased; the bending strength and fracture toughness first decreased then increased slightly and then decreased. When the TiCN content was 1.0wt%, the comprehensive performance of the cemented carbide was the best.

中图分类号 TF124   DOI 10.11973/jxgccl201806016

 
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所属栏目 材料性能及应用

基金项目 国家自然科学基金青年基金资助项目(51705228);广东省“扬帆计划”引进创新创业团队专项资助项目(2014YT02C049);广东省自然科学基金资助项目(S2013010012107);广东省教育厅项目(2016KTSCX079);广东省“大创”项目(201810579651);岭南师范学院博士启动专项项目(1170916002);湛江市财政科技专项竞争性分配项目(2017A02021)

收稿日期 2017/4/25

修改稿日期 2018/5/10

网络出版日期

作者单位点击查看

备注廖聪(1978-),男,广东茂名人,讲师,博士

引用该论文: LIAO Cong,GONG Manfeng,LI Mingsheng,LI Man. Effect of TiCN Addition on Properties of WC-Co Cemented Carbide[J]. Materials for mechancial engineering, 2018, 42(6): 78~82
廖聪,弓满锋,李明圣,李曼. TiCN的添加对WC-Co硬质合金性能的影响[J]. 机械工程材料, 2018, 42(6): 78~82


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