激光熔覆工艺参数及微合金元素对Fe基非晶复合涂层显微硬度的影响  

Effects of Laser Cladding Parameters and Micro-alloy Elements on the Micro-hardness of Fe-based Amorphous Composite Coating

作　　者：侯纪新[1] 章顺虎[1] 蒋小舟 陈长军[2] 王晓南[1] 

机构地区：[1]苏州大学沙钢钢铁学院,江苏苏州215021 [2]苏州大学机电工程学院,江苏苏州215021

出　　处：《应用激光》2015年第4期402-407,共6页Applied Laser

基　　金：江苏省基础研究计划资助项目(自然科学基金--青年基金项目编号:BK20130304;BK20130315);国家自然科学基金资助项目(项目编号:51305285;51401139)

摘　　要：采用预置粉末的方法,在700 MPa钢板表面利用激光熔覆技术制备了含氮Fe基非晶复合涂层。通过分析扫描速度及功率对熔覆层显微硬度的影响,发现只有在适当的扫描速度下制备的熔覆层才具有较高的显微硬度;而在一定扫描速率下,当激光功率在1.5kW时制备的熔覆层具有相对较高的显微硬度。与此同时,讨论了微合金元素Nb的添加以及N元素的含量对熔覆层显微硬度的影响。With the preset powder,Fe-based amorphous composite coating was prepared by laser cladding on 700 MPa steel.The effects of laser scanning speed and laser power were studied on micro-hardness of laser cladding layer,which shows that a proper scanning speed and 1.5kW of laser power will be better for getting higher micro-hardness of laser cladding layer.At the same time,the influence of micro-alloy element Nb and Nitrogen content were studied on the micro-hardness of laser cladding layer.

关 键 词：激光熔覆 Fe基非晶复合涂层 工艺参数 微合金元素 显微硬度 

分 类 号：TG456.7[金属学及工艺—焊接] TG174.44