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当前,如何有效去除氧化物和获得较高的熔覆层质量是激光熔敷技术在铝合金材料应用中面临的难题。为提高激光熔覆层质量,在铝合金激光熔覆中引入了CJ401气焊熔剂,通过大量实验获得了熔覆层的宏观形貌、稀释率、显微硬度、搭接率、摩擦学性能、耐磨性等物理量与特性,进一步通过比较和分析获得了CJ401气焊熔剂对激光熔覆层质量的影响特性。结果表明,添加CJ401气焊熔剂可改善熔覆层的宏观形貌,增大稀释率;在激光功率1800W,扫描速度3mm/s,光斑直径4mm,搭接系数0.5的最优工艺参数下获得的熔覆层较基体硬度提高了61%,滑动摩擦系数降低了19.7%,耐磨性提高了10.9%。
At present, how to effectively remove oxides and obtain higher cladding quality is the challenge that laser cladding technology faces in the application of aluminum alloy materials. In order to improve the quality of the laser cladding layer, the CJ401 gas flux was introduced into the aluminum alloy laser cladding. The macroscopic morphology, dilution rate, microhardness, lap rate, tribological properties, wear resistance Grinding and other physical quantities and characteristics, and further through the comparison and analysis obtained CJ401 flux soldering flux on the laser cladding quality characteristics. The results show that the addition of CJ401 gas flux can improve the macroscopic morphology and increase the dilution rate. Under the optimum process parameters of laser power of 1800W, scanning speed of 3mm / s, spot diameter of 4mm and overlap coefficient of 0.5, Coating hardness increased by 61% compared with the base, the sliding friction coefficient decreased by 19.7%, wear resistance increased by 10.9%.