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以 Ti,Si C混合粉末作为预置合金涂层 ,采用 2 k W连续 Nd:YAG固体激光器进行激光熔覆处理 ,在 6 0 6 1铝合金表面借助于接触反应法制备原位自生 Ti C颗粒增强 Al- Ti复合材料涂层。试验结果表明 :采用合适的激光辐照工艺参数 ,可获得增强相 Ti C弥散分布 ,以 Ti- Al金属间化合物及 Al过饱和固溶体为主要组成相的复合材料熔覆层组织。Ti C颗粒与复合材料基体润湿良好 ,熔覆层结晶致密 ,与 6 0 6 1铝合金基材呈良好的冶金结合 ,可明显地改善铝合金的表面性能
Ti and Si C powders were used as the pre-alloyed coatings. Laser cladding was carried out by using 2 k W continuous Nd: YAG solid state laser. In-situ TiC particles were prepared on the surface of 6 0 6 1 aluminum alloy by contact reaction Reinforced Al-Ti composite coating. The experimental results show that the microstructure of the composite coating with Ti-Al intermetallic compound and Al supersaturated solid solution as the main phase can be obtained by using proper laser irradiation process parameters. Ti C particles and the matrix of the composite material wet well, the cladding layer is compact, and the 6 0 6 1 aluminum alloy substrate has a good metallurgical bond, which can obviously improve the surface properties of the aluminum alloy