马永,朱红梅,孙楚光,廖帮亮,申龙章,何彬,朱卫华,王新林.TC4钛合金表面激光熔覆掺Y2O3复合涂层的显微组织和性能[J].表面技术,2017,46(6):238-243.
MA Yong,ZHU Hong-mei,SUN Chu-guang,LIAO Bang-liang,SHEN Long-zhang,HE Bin,ZHU Wei-hua,WANG Xin-lin.Microstructure and Properties of Y2O3-doped Laser Cladded Composite Coating on TC4 Titanium Alloy[J].Surface Technology,2017,46(6):238-243 |
| TC4钛合金表面激光熔覆掺Y2O3复合涂层的显微组织和性能 |
| Microstructure and Properties of Y2O3-doped Laser Cladded Composite Coating on TC4 Titanium Alloy |
| 投稿时间：2017-01-23 修订日期：2017-06-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.06.038 |
| 中文关键词: TC4钛合金 激光熔覆 复合涂层 显微组织 显微硬度 耐磨性能 |
| 英文关键词:TC4 titanium alloy laser cladding composite coating microstructure microhardness wear resistance |
| 基金项目:湖南省自然科学基金（2015JJ6098） |
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| Author | Institution |
| MA Yong | a.School of Mechanical Engineering, University of South China, Hengyang 421001, China |
| ZHU Hong-mei | a.School of Mechanical Engineering, University of South China, Hengyang 421001, China |
| SUN Chu-guang | a.School of Mechanical Engineering, University of South China, Hengyang 421001, China |
| LIAO Bang-liang | a.School of Mechanical Engineering, University of South China, Hengyang 421001, China |
| SHEN Long-zhang | a.School of Mechanical Engineering, University of South China, Hengyang 421001, China |
| HE Bin | a.School of Mechanical Engineering, University of South China, Hengyang 421001, China |
| ZHU Wei-hua | b.School of Electrical Engineering, University of South China, Hengyang 421001, China |
| WANG Xin-lin | a.School of Mechanical Engineering, b.School of Electrical Engineering, University of South China, Hengyang 421001, China |
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| 中文摘要: |
| 目的 提高钛合金表面的耐磨性能。方法 在TiB2:TiC=1:3的粉末配比下，添加不同质量分数Y2O3稀土氧化物，制备成膏状混合粉末。采用5 kW横流CO2激光器，在TC4钛合金表面激光熔覆掺Y2O3的TiB2和TiC粉末，制备耐磨性复合涂层。通过扫描电子显微镜（SEM）、X射线能谱仪（EDS）、X射线衍射仪（XRD）对激光熔覆层的微观形貌和组织成分进行了分析；用显微维氏硬度计对熔覆层的显微硬度进行了测量；用万能摩擦磨损试验机对熔覆层的耐磨性能进行了测试。结果 添加4%Y2O3后，熔覆层中部组织明显细化，结合区由致密组织结构转变为晶须网状结构；熔覆层的最高显微硬度为1404.6HV0.2，是基体的3.7倍；熔覆层的磨损量减少了66.67%，且其摩擦系数有明显的降低。结论 添加4%Y2O3对TC4钛合金表面激光熔覆TiB/TiC复合熔覆层耐磨性能有显著的提高。 |
| 英文摘要: |
| The work aims to improve wear resistance of TC4 titanium alloy. Pasty mixed powder was prepared at a proper ratio of TiB2:TiC (1:3) and adding Y2O3 rare earth oxide in different mass fractions. Wear resistant composite coating was prepared by laser cladding Y2O3-doped TiB2 and TiC powder on the surface of TC4 titanium alloy using 5 kW continuous wave CO2 laser. Microstructure and composition of the laser cladding layers were analyzed with scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffractometer (XRD); microhardness of the laser cladding layer was measured with Vickers hardness tester; and wear resistance was tested with universal friction and wear tester. After 4% Y2O3 was added, grain size of the middle structure was greatly refined; microstructure of the bonding zone was transformed from compact structure to reticular whisker structure; maximum microhardness of the cladding layer was 1404.6HV0.2, 3.7 times as high as that of TC4 substrate; wear loss of the cladding layer decreased by 66.67%, and the friction coefficient decreased remarkably. Wear resistance of the laser cladded TiC/TiB composite cladding coating on the surface of TC4 titanium alloy can be improved significantly by adding 4% Y2O3. |
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