铝合金表面激光熔覆稀土镍基合金强化层基础研究

项目名称： 铝合金表面激光熔覆稀土镍基合金强化层基础研究

项目编号： No.51201043

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 金属材料学科

项目作者： 王成磊

作者单位： 桂林电子科技大学

项目金额： 25万元

中文摘要： 为提高铝合金的综合使用性能，扩大其应用范围，本研究拟在六系列铝合金基体表面，将激光熔覆技术和稀土改性技术结合，激光熔覆添加有稀土元素的镍基合金粉末，获得冶金结合的高耐磨高耐腐蚀复合强化涂层。本课题拟进行：①在六系列铝合金基体（如6061、6063等）表面，研究稀土粉末（镧、铈、镝、铒、钇等）和镍基合金粉末的种类、配比及激光工艺参数（激光功率、光斑直径、扫描速度等）对熔覆层性能的影响，获得最佳工艺；②研究稀土和镍基合金粉末的种类、配比及激光工艺参数的变化对激光熔覆层显微组织、成分、相结构等微观结构及激光熔覆层外观、致密度、硬度、结合强度、耐磨性、抗高温氧化性、耐蚀性等性能的影响，并深入分析其影响机理；③熔覆层组织成分的变化规律，稀土元素在熔覆层金属中的分布情况和作用机理；④复合强化处理后表面硬度、红硬性、致密度、结合强度、耐磨性、耐蚀性及耐高温性能研究；⑤铝合金激光熔覆的基础理论研究。

中文关键词： 激光熔覆；铝合金；稀土；镍基合金；表面改性

英文摘要： Combing the laser cladding technology with the rare earth modification technology, laser cladding of rare earth doped nickel based alloy on the surface of aluminum alloy will be investigated to obtain comprehensive strengthening coatings with high wear resistance and high corrosion resistant, enhancing the comprehensive practical properties and expanding its scope of application. The following five parts of experiments will be carried out: (1)Investigate the effects of species of the rare earth (lanthanum, cerium, dysprosium, erbium, yttrium) and nickel based alloy powders, the powder ratio, the process parameters of the laser cladding (the power of the laser, the diameter of the light spot, the scanning speed) on the properties of the laser cladding layers on the surface of the sixth series aluminum based alloys (such as 6061, 6063, etc.). (2) Investigate the effects of species of the rare earth and nickel based alloy powders, the powder ratio, the process parameters of the laser cladding on the microstructure, composition, phase structures, the appearance of the laser cladding layers, the density, hardness, combining strength, wear resistance, high temperature oxidation resistance and corrosion resistance of the laser cladding layers, and analyze the impact mechanism deeply. (3) Investigate the variation of th

英文关键词： laser cladding；aluminum；rare earth；nickel-base alloy；surface modification