| Ti添加对WC-Ni3Al硬质合金微观组织与力学性能的影响 |
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| 引用本文： | 吴祖骥,范佳锋,李京懋,朱德智,屈盛官,李小强.Ti添加对WC-Ni3Al硬质合金微观组织与力学性能的影响[J].材料工程,2022,50(12):103-111. |
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| 作者姓名： | 吴祖骥 范佳锋 李京懋 朱德智 屈盛官 李小强 |
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| 作者单位： | 华南理工大学 国家金属材料近净成形工程技术研究中心, 广州 510640 |
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| 基金项目： | 国家自然科学基金项目(51474108);广东省自然科学基金重点项目(2018B030311051);宜春经开区创新驱动发展科技计划项目(1203) |
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| 摘 要： | 为提高WC-Ni3Al硬质合金的力学性能，采用放电等离子烧结制备Ti掺杂的WC-Ni3Al硬质合金，并研究不同Ti添加量对WC-Ni3Al硬质合金微观组织和力学性能的影响。结果表明: Ti的添加减小WC-Ni3Al块体样品中反应生成的少量Al2O3的尺寸，并且使Al2O3的分布更加均匀。一方面，小尺寸的Al2O3与原位生成的(Ti, W)C协同提高WC-Ni3Al块体样品的硬度；另一方面，适量Ti的添加还提高WC-Ni3Al硬质合金的断裂韧度，这是由于原位生成的(Ti, W)C与WC有较好的界面结合，增加对裂纹扩展的桥接与偏转作用。当添加3%(质量分数)的Ti时，WC-Ni3Al硬质合金获得了优异的力学性能，硬度和断裂韧度分别为(19.29±0.18) GPa和(13.14±0.24) MPa·m1/2。
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| 关 键 词： | Ti掺杂 WC-Ni3Al 原位生成(Ti W)C 微观组织 力学性能 |
| 收稿时间： | 2021-11-30 |
Effect of titanium addition on microstructure and mechanical properties of WC-Ni3Al cemented carbide |
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| Zuji WU,Jiafeng FAN,Jingmao LI,Dezhi ZHU,Shengguan QU,Xiaoqiang LI.Effect of titanium addition on microstructure and mechanical properties of WC-Ni3Al cemented carbide[J].Journal of Materials Engineering,2022,50(12):103-111. |
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| Authors: | Zuji WU Jiafeng FAN Jingmao LI Dezhi ZHU Shengguan QU Xiaoqiang LI |
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| Affiliation: | National Engineering Research Center of Near-net-shape Forming Technology for Metallic Materials, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | Ti-doped WC-Ni3Al cemented carbide was prepared by spark plasma sintering for improving mechanical properties. The effect of different Ti contents on the microstructure and mechanical properties of WC-Ni3Al cemented carbide was investigated. The results show that due to Ti addition, the small amount of Al2O3reactively formed in WC-Ni3Al is smaller and more uniform than the sintered sample without adding Ti. The refinement of Al2O3 and the in-situ (Ti, W) C synergistically enhance the hardness of the WC-Ni3Al cemented carbide. Meanwhile, the fracture toughness is improved because the in-situ (Ti, W)C and WC have a better interface combination, facilitating the bridging and deflection formation of cracks. The WC-Ni3Al cemented carbide with 3% (mass fraction) Ti obtains the optimal mechanical properties, with hardness of (19.29±0.18) GPa and fracture toughness of (13.14±0.24) MPa·m1/2. |
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| Keywords: | Ti-doped WC-Ni3Al in-situ (Ti W)C microstructure mechanical property |
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