| 钛合金表面激光熔覆TiC/Ti-Ti2Co涂层耐磨性 |
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| 引用本文： | 刘铭坤,汤海波,方艳丽,张述泉,刘栋,王华明.钛合金表面激光熔覆TiC/Ti-Ti2Co涂层耐磨性[J].激光技术,2011,35(4):444-447,452. |
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| 作者姓名： | 刘铭坤 汤海波 方艳丽 张述泉 刘栋 王华明 |
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| 作者单位： | 1.北京航空航天大学 大型整体金属构件激光直接制造教育部工程研究中心, 北京 100191 |
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| 基金项目： | 国家九七三重点基础研究发展计划资助项目，国家自然科学基金资助项目 |
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| 摘 要： | 为了提高钛合金的耐磨性能,以Co基合金粉末、钛粉和活性碳为原料,利用激光熔覆技术在TC4钛合金基材表面制得以原位自生TiC为增强相的耐磨涂层,用光学显微镜、扫描电子显微镜、X射线衍射仪和能谱仪等分析了涂层的显微组织、相组成及成分,在室温干滑动磨损条件下测试了涂层的室温耐磨性能.结果表明,原位生成的TiC增强相主要以发达...
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| 关 键 词： | 激光技术 耐磨性能 激光熔覆 钛合金 TiC Ti2Co |
| 收稿时间： | 2010-10-19 |
Wear resistance of laser clad TiC/Ti-Ti2 Co coating on titanium alloy |
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| LIU Ming-kun,TANG Hai-bo,FANG Yan-Ii,ZHANG Shu-quan,LIU Dong,WANG Hua-ming.Wear resistance of laser clad TiC/Ti-Ti2 Co coating on titanium alloy[J].Laser Technology,2011,35(4):444-447,452. |
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| Authors: | LIU Ming-kun TANG Hai-bo FANG Yan-Ii ZHANG Shu-quan LIU Dong WANG Hua-ming |
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| Abstract: | In order to improve the tribological properties of titanium alloy,a wear resistant coating with a microstructure consisting of insitu TiC primary dendrites and Ti-Ti2Co matrix was fabricated on a substrate of titanium alloy TC4 by means of laser cladding using Co-based alloy powders,activated carbon and titanium powders as the precursor materials.The microstructure and composition of the intermetallic composite coating was studied by means of optical microscope,scanning electron microscope,X-ray diffraction,energy dispersive spectrometer.The wear resistance of the coating was tested under dry sliding wear condition at room temperature.It is revealed that the laser clad composite coating has a rapidly solidified homogeneous microstructure and is metallurgically bonded to the substrate.The developed in situ TiC primary dendrites dispersed in the B-Ti-Ti2Co matrix of the coating as reinforcements.The B-Ti phase shows irregular crystal or cell dendrites.And most of the Ti2Co phase distributes over the matrix as irregular block crystal,with some lamellar Ti2Co formed in the inter-dendrite arms of the β-Ti phase.It is found that the microhardness of the coating is in the range of HV600～HV700.The laser clad TiC/ Ti-Ti2Co coating,in which the TiC phase plays a main role in enhancement,has excellent wear resistance under dry sliding wear test conditions.The results show that the coating is helpful to improve wear resistance of titanium alloy. |
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