| 激光熔敷NiTi/Ni3Ti金属间化合物复合材料涂层组织及耐磨性 |
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| 引用本文： | 李昂,王华明.激光熔敷NiTi/Ni3Ti金属间化合物复合材料涂层组织及耐磨性[J].材料热处理学报,2006,27(5):87-90. |
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| 作者姓名： | 李昂 王华明 |
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| 作者单位： | 北京航空航天大学材料学院激光材料加工制造技术实验室,北京,100083 |
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| 基金项目： | 国家自然科学基金;航空基础科学基金 |
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| 摘 要： | 以Ni79Ti21（wt％）合金粉末为原料，采用同步送粉激光熔敷技术在BT20钛合金表面制备出NiTi／Ni3Ti金属间化合物复合材料涂层，分析了该涂层的显微组织，测试了该涂层的室温干滑动磨损性能。结果表明，激光熔敷涂层组织均匀致密，与基材呈良好的冶金结合，具有优良的抗滑动磨损性能。
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| 关 键 词： | 激光熔敷 金属间化合物 复合材料涂层 显微组织 磨损 |
| 文章编号： | 1009-6264（2006）05-0087-04 |
| 收稿时间： | 2005-12-29 |
| 修稿时间： | 2005-12-292006-03-01 |
Microstructure and wear resistance of laser clad NiTi/Ni3 Ti intermetallic composite coating |
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| LI Ang,WANG Hua-ming.Microstructure and wear resistance of laser clad NiTi/Ni3 Ti intermetallic composite coating[J].Transactions of Materials and Heat Treatment,2006,27(5):87-90. |
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| Authors: | LI Ang WANG Hua-ming |
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| Abstract: | Wear-resistant NiTi/Ni_3Ti intermetallic composite coating was fabricated on substrate of a titanium alloy BT20 by laser cladding.Microstructure of the NiTi/Ni_3Ti intermetallic composite coating was characterized and the room-temperature dry sliding wear-resistance was evaluated coupling with hardened bearing steel GCr15.The coating has a homogeneous microstructure and is metallurgically bonded to the titanium alloy substrate.Wear-resistance of the composite coating is superior to BT20 titanium alloy under dry sliding wear test conditions.The excellent wear resistance of the laser clad NiTi/Ni_3Ti intermetallic composite coating is attributed to the combination of high strength and toughness of intermetallics of NiTi and Ni_3Ti. |
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| Keywords: | laser cladding intermetallics composite coating microstructure wear |
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