激光熔覆Fe_(60)Nb_(20)Ti_(20)非晶合金粉末及组织性能研究  

Microstructure and Properties of Laser Clad Fe_(60)Nb_(20)Ti_(20) Amorphous Alloy Powder

作　　者：戴文攀 唐翠勇[1] 汪明文[1] 康剑鸣 陈学永[1] 张翔[1] 

机构地区：[1]福建农林大学机电工程学院,福州350002

出　　处：《材料导报》2015年第10期100-104,共5页Materials Reports

基　　金：福建省自然科学基金(2014J05056);福建农林大学青年教师科研基金(2013xjj20);福建省大学生创新训练项目(201410389027);高水平大学建设立项项目(612014049)

摘　　要：采用激光熔覆工艺在45钢表面对Fe60Nb20Ti20非晶合金粉末进行不同工艺参数熔覆试验,获得无裂纹且呈冶金结合的涂层。利用扫描电镜、X射线衍射仪、显微硬度计、摩擦磨损试验机对涂层的微观形貌、组成相、显微硬度和摩擦磨损性能进行分析。结果表明,涂层组织为细小的α-Fe过饱和固溶体等轴晶和少量的非晶相。涂层平均硬度为857HV,为基体材料的4倍,耐磨性也明显优于基体材料。Fe40Nb20Ti20 amorphous alloy powder were clad by laser cladding technology on the substrate of 45 steel surface with different process parameters. The obtained coating was metallurgically bonded with the substrate without visible crack. The microstructure and phase transformation of these coatings were analyzed by means of scan- ning electron microscopy artd X-ray diffraction, micro-hardness~ and wear resistance properties were measured using Vickers micro-hardness tester and wear testing machine. The results showed that the mierostructure of the clad coa- ting was featured with a-Fe supersaturated solid solution and a small amount of amorphous phase. The average micro- hardness of the clad layer was approximately 857HV,which was 3 times greater than that of the substrate. The wear resistance was also obviously improved.

关 键 词：激光熔覆 铁基非晶合金 显微硬度 耐磨性 

分 类 号：O75[理学—晶体学]