添加Ni对激光熔覆CuAl10铜合金组织与性能的影响

发布时间：2018-02-28 21:27

本文关键词： 激光技术激光熔覆铜合金微观组织 α-(Cu Ni)相耐蚀性能　出处：《中国激光》2015年03期 　论文类型：期刊论文

【摘要】：为进一步提高Cu Al10合金激光熔覆层的耐蚀性能,研究添加不同质量分数的Ni对Cu Al10熔覆层组织及性能的影响。采用HPDL-D30半导体激光设备,用同步送粉的方式在316L不锈钢基体表面进行激光熔覆。借助扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射(XRD)对激光熔覆层进行组织、成分及物相分析,并使用显微硬度计进行硬度分析和电化学工作站进行耐蚀性能分析。研究结果表明:添加Ni元素的铜合金熔覆层与基体金属冶金结合,组织分布均匀;添加Ni能显著提高激光熔覆层的耐蚀性能,随着Ni含量的增加,其耐蚀性呈增强趋势,Ni质量分数为6.0%时,耐蚀性能达到最优;未添加Ni元素的熔覆层物相主要以α-Cu,α-Fe,Al Fe3,Cu9Al4组成,添加Ni元素的熔覆层物相主要由α-Cu,α-(Cu,Ni),Al Cu3,Cu9Al4组成。
[Abstract]:In order to further improve the corrosion resistance of Cu Al10 alloy laser cladding coating, the effect of adding Ni with different mass fraction on the microstructure and properties of Cu Al10 cladding coating was studied. HPDL-D30 semiconductor laser equipment was used. Laser cladding was carried out on the surface of 316L stainless steel by synchronous powder feeding. The structure, composition and phase of the laser cladding coating were analyzed by means of scanning electron microscope (SEM) and energy spectrometer (EDS) X-ray diffraction (XRD). The microhardness analysis and electrochemical workstation were used to analyze the corrosion resistance of copper alloy. The results showed that the copper alloy cladding layer with Ni element was combined with the matrix metal metallurgy and the microstructure was evenly distributed. The corrosion resistance of laser cladding coating increased with the increase of Ni content. The corrosion resistance of laser cladding coating was optimized when Ni content was 6.0, and the phase of cladding without Ni was 伪 -Cu, 伪 -Feo Al Fe 3N Cu 9Al 4, and the corrosion resistance of laser cladding coating was improved with the increase of Ni content, and the corrosion resistance of laser cladding coating was optimized when the mass fraction of Ni was 6.0. The phase of the cladding layer containing Ni is mainly composed of 伪 -Cu, 伪 -CU, Al Cu _ 3O Cu _ 9Al _ 4.
【作者单位】：北京工业大学激光工程研究院;
【基金】：国家973计划(2011CB606365-3) 国家自然科学基金(50971004) 研究生创新平台建设(101000543214524)
【分类号】：TG174.4;TG146.11

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