| WC-(W,Ti)C-(Ta,Nb)C-Co涂层硬质合金的组织与性能 |
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| 引用本文： | 肖代红,陈康华,王社权. WC-(W,Ti)C-(Ta,Nb)C-Co涂层硬质合金的组织与性能[J]. 金属热处理, 2009, 34(1): 19-22 |
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| 作者姓名： | 肖代红 陈康华 王社权 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室,湖南,长沙,410083;中南大学粉末冶金国家重点实验室,湖南,长沙,410083;株洲钻石切削股份有限公司,湖南,株洲,412000 |
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| 基金项目： | 国家自然科学基金创新研究群体基金 |
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| 摘 要： | 用控制烧结工艺制备了均质基体结构与梯度基体结构的WC-(W,Ti)C-(Ta,Nb)C-Co硬质合金,采用化学气相沉积工艺在合金表面涂上TiCN/Al203/TiN涂层,制备成相应的涂层硬质合金及刀片.运用金相观察、扫描电镜分析、三点抗弯强度测试及切削性能测试,研究了梯度基体结构对涂层WC-(W,Ti)C-(Ta,Nb)C-Co硬质合金的组织与力学性能影响.结果表明,采用梯度烧结工艺,可以在合金的表层形成梯度韧性区,该韧性区可以提高裂纹扩展阻力.所制备的梯度基体结构合金的抗弯强度明显超过均质基体结构合金,而相应涂层硬质合金刀片在保持耐磨性能的同时能显著提高抗冲击性能.
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| 关 键 词： | 涂层硬质合金 梯度结构 显微组织 力学性能 |
Microstructure and properties of WC-(W,Ti)C-(Ta,Nb)C-Co coated carbide alloy |
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| XIAO Dai-hong,CHEN Kang-hua,WANG She-quan. Microstructure and properties of WC-(W,Ti)C-(Ta,Nb)C-Co coated carbide alloy[J]. Heat Treatment of Metals, 2009, 34(1): 19-22 |
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| Authors: | XIAO Dai-hong CHEN Kang-hua WANG She-quan |
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| Affiliation: | 1.State Key Laboratory of Powder Metallurgy;Central South University;Changsha Hu'nan 410083;China;2.Zhuzhou Cemented Carbide Cutting Tools Co Ltd;Zhuzhou Hu'nan 412000;China |
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| Abstract: | The WC-(W,Ti)C-(Ta,Nb)C-Co carbide alloys between homogeneous substrate and gradient substrate were prepared by controlling sintering technology.TiCN/Al2O3/TiN coating was prepared on the surface of the carbide alloy by chemical vapor deposition(CVD)so as to prepare coated carbide alloy and blades.The effects of gradient structure on microstructure and mechanical properties of WC-(W,Ti)C-(Ta,Nb)C-Co coated carbide alloy were investigated by optical microscopy,scanning electron microscopy,bending strength me... |
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| Keywords: | coated carbide alloy gradinet structure microstructure mechanical properties |
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