| 激光熔覆Cr7C3增强铬镍硅涂层组织与耐磨性 |
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| 引用本文： | 刁望勋,汤海波,方艳丽,刘栋,张述泉,王华明.激光熔覆Cr7C3增强铬镍硅涂层组织与耐磨性[J].激光技术,2011,35(4):457. |
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| 作者姓名： | 刁望勋 汤海波 方艳丽 刘栋 张述泉 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： | 国家自然科学基金资助项目 |
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| 摘 要： | 为了提高材料耐磨性,以Cr3C2和0.47Cr-0.50Mi-0.03Si合金粉末为原料,利用激光熔覆制备工艺,在A3钢表面制得了Cr7C3硬质相增强Cr-Ni-Si金属硅化物复合材料涂层;利用光学显微镜、扫描电子显微镜、X射线衍射仪、能谱仪与电子探针等分析了涂层的显微组织,并在室温干滑动条件下测试其耐磨性能。结果表明,硬质颗粒相Cr7C3的加入,显著提高了Cr-Ni-Si金属硅化物涂层的硬度,涂层具有良好的室温耐磨性能。
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| 关 键 词： | 激光技术 激光熔覆涂层 显微组织 耐磨性 Cr7C3 |
| 收稿时间： | 2010-09-13 |
Microstructure and wear resistance of laser clad Cr7C3 reinforced Cr-Ni-Si coating |
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| DIAO Wang-xun,TANG Hai-bo,FANG Yan-li,LIU Dong,ZHANG Shu-quan,WANG Hua-ming.Microstructure and wear resistance of laser clad Cr7C3 reinforced Cr-Ni-Si coating[J].Laser Technology,2011,35(4):457. |
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| Authors: | DIAO Wang-xun TANG Hai-bo FANG Yan-li LIU Dong ZHANG Shu-quan WANG Hua-ming |
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| Abstract: | A wear resistant Cr7C3 reinforced Cr-Ni-Si ternary metal silicide composite coating was fabricated on a substrate of A3 mild steel by means of laser cladding with Cr3C2 and 0.47Cr-0.50Ni-0.03Si alloy powder as the precursor material.The microstructure and composition of the coating were investigated by means of optical microscopy,scanning electron microscopy,Xray diffraction,energy dispersive spectrometer and electron probe micro-analyzer.Then the wear resistance of the coating was tested under dry sliding wear condition at room temperature.Results indicated that,microhardness of the Cr-Ni-Si coating was evidently improved because of the introduction of Cr7C3.The laser clad Cr7C3 reinforced Cr-Ni-Si ternary metal silicide composite coating shows excellent wear resistance under dry sliding wear test conditions. |
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