中文摘要：

利用IPG YLS4000光纤激光器,采用激光熔覆工艺在某高强钢基体上制备了一种新型含氮Fe基非晶复合涂层。通过X射线衍射仪物相分析发现,在3种不同激光工艺下制备的涂层在非晶基体上出现了不同含量的晶化相,分别对3种工艺下制备的涂层与基体材料的硬度、耐磨及耐蚀性能进行了测试分析。结果表明,与基体材料相比,3种涂层的硬度、耐磨及耐蚀性均有明显提高,其中在1.5 k W激光功率、180 mm/min扫描速度条件下制备的涂层非晶含量最高,表现出最好的性能。研究认为合适的工艺才能制备出性能优良的涂层,涂层中非晶相含量的增加能够明显改善涂层的性能。

英文摘要：

With the IPG YLS4000 optical fiber laser, N-doped Fe-based amorphous composite coatings are prepared on a high strength steel substrate by three laser processes. The three coatings show amorphous structure with crystalline phase on them. The hardness, wear resistance and corrosion resistance of the coatings are evaluated, indicating that the coatings have higher hardness, better wear resistance and corrosion resistance than substrate. The coating 2 fabricated under laser power of 1.5 kW and laser beam scanning speed of 180 mm/min has the highest amorphous phase content among the three coatings, and it also exhibits the best performance compared with the other two coatings. The results show that proper laser process parameters are important and coatings with higher amorphous phase content have better properties.