【作者】 张培磊； 李铸国； 姚成武； 李瑞峰；

【Author】 Zhang Peilei;Li Zhuguo;Yao Chenwu;Li Ruifeng;Shanghai Key Laboratory of Material Laser Processing and Modification,Shanghai Jiaotong University;

【机构】 上海交通大学上海市激光制造与材料改性重点实验室；

【摘要】 采用激光熔覆+激光重熔的工艺方法在低碳钢基体上制备了Fe-Ni-Si-B-Nb系非晶复合涂层。利用X射线衍射、扫描电镜、EDAX能谱及透射电镜分析了涂层的物相、组织结构与非晶形成的影响因素。研究结果表明:熔覆层的组织由表面至基体分为:非晶复合区、原始熔覆层与基体,其中非晶复合区中为Fe2B+γ-(Fe,Ni)多晶+非晶相的混合。在激光非晶化中,抑制涂层中简单晶相的生成而促进复杂晶相的生成对于形成非晶相有利。更多还原

【Abstract】 The Fe-Ni-B-Si-Nb amorphous composite coating was fabricated on the mild steel by laser cladding and laser remelting.The phases,microstructure and the impacts on glasses forming ability of the amorphous coatings were studied using X-ray diffractometer,scan electron microscope,EDAX energy spectrometer and transmission electron microscope.The results show that the microstructure of coating was consist of amorphous composite zone,original cladding zone and base metal.The amorphous composite zone was consist of Fe2 B,γ-(Fe,Ni) and amorphous phase.Suppressing the crystalline phases with simple structure and promoting the crystalline phases with complex structure are good for fabricating the amorphous phase.更多还原