| 激光熔覆钛基复合涂层的显微组织和硬度分析 |
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| 引用本文： | 徐正均,张馨予,陈雪,张有凤.激光熔覆钛基复合涂层的显微组织和硬度分析[J].上海工程技术大学学报,2013(4):306-309. |
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| 作者姓名： | 徐正均 张馨予 陈雪 张有凤 |
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| 作者单位： | 上海工程技术大学材料工程学院,上海201620 |
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| 基金项目： | 上海工程技术大学大学生创新训练计划资助项目（cx1305003） |
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| 摘 要： | 采用激光熔覆快速非平衡合成方法制备了原位反应合成TiB增强钛基复合材料．用Y2O3、Ti和B的混合粉末在Ti-6Al-4V基体表面激光熔覆制得TiB／Ti复合涂层．采用X线衍射仪（XRD）、扫描电子显微镜（SEM）、能量散射光谱仪（EDS）和硬度测试等方法，研究了原位合成TiB／Ti复合涂层的显微结构和显微硬度．结果显示：激光熔覆层的相结构主要为α—Ti和TiB两相，TiB增强相均匀地分布于复合涂层中，熔覆层的硬度值高于基体Ti合金的硬度值1倍以上，Y2O3含量（质量分数ω，全文同）为1％的激光熔覆涂层内部的增强相组织最为均匀、细小，且硬度值也最高，平均硬度（HV）值约为830．
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| 关 键 词： | 激光熔覆 复合涂层 显微结构 硼化钛 |
Microstructure and Hardness Analysis of Composite Coating on Titanium Alloy Fabricated by Laser Cladding |
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| Affiliation: | XU Zhengjun , ZHANG Xinyu , CHEN Xue , ZHANG You f eng (College of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China) |
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| Abstract: | In situ reaction synthesized TiB reinforced titanium matrix composites were fabricated by non- equilibrium synthesis technique of laser cladding. TiB/Ti composite coating was fabricated on Ti-6Al-4V surface with Y2O3, Ti and B mixed powder by laser cladding. Microstructure and hardness of the in situ synthesized TiB/Ti composite coatings were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, energy-dispersive spectroscopy（EDS） and Vickers hardness test. The results show that the laser cladding coating consists of α -Ti and TiB, TiB reinforcement is dispersed homogeneously in the composite coating. The microhardness of the cladding coating is one time higher than that of titanium alloy. The microstructure of the reinforced phase in the cladding coating with concentration of 1% Y2O3 is the most uniform and the smallest,its hardness is the highest and the average hardness is about 830. |
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| Keywords: | laser cladding composite coating microstructure TiB |
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