摘要
为研究稀土对Fe B激光熔覆层摩擦学性能的影响,采用自配Fe,B4C,硅铁稀土混合粉末在45#钢基体上进行激光熔覆实验,并在HQ 1摩擦磨损实验机上对不同稀土含量的熔覆层进行摩擦磨损实验。结果表明:含适量稀土熔覆层的耐磨性得到很大提高,在本实验条件下,硅铁稀土加入量最佳值为4%～5%,此时熔覆层耐磨性提高25.8%,当硅铁稀土加入量过多时,熔覆层耐磨性反而降低,甚至低于不加稀土时的耐磨性。通过对磨斑表面硼元素(1s电子轨道)的XPS图谱分析表明,熔覆层中铁与硼主要以Fe2B相存在。磨损表面部分镧元素被氧化,生成La2O3。
In order to study the influence of rare earth (RE) elements on the tribological properties of laser melt cladding Fe-B layer, laser melt cladding experiment was performed using Fe, B_4C, FeSiRE powder on steel 45 substrate. Systematic wear tests were done for laser cladding layer containing different content of RE on HQ-1 wear machine. The results show that wear resistance of laser melt cladding layer containing a certain amount of RE elements is remarkably improved, when the content of RE exceeds the optimum amount, the wear resistance of the cladding layer declines distinctly, even worse than the cladding layer that without RE. When the content of FeSiRE reaches 4%～5%, the wear resistance is excellent and the wear resistance is improved by 25.8%. Based on boron element (1s) X-ray photoelectron microscopy (XPS) analysis of abrasion surface, the conclusions can be made that the structure of laser cladding mainly consists of Fe_2B phase, And there is some La_2O_3 in abrasion surface owing to oxidation of La.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2005年第1期96-99,共4页
Journal of the Chinese Society of Rare Earths
基金
汕头大学校基金资助项目(140-934042)
关键词
激光熔覆
摩擦学性能
Fe2B相
稀土
laser melt cladding
tribological properties
Fe_2B phase
rare earths
