磁场参数对Fe5自熔合金性能及显微组织的影响  

Effect of magnetic field parameters on properties and microstructure of Fe5 overlay deposit

作　　者：刘政军[1] 贾华[1] 苏允海[1] 苏明[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110178

出　　处：《焊接技术》2009年第11期20-23,共4页Welding Technology

摘　　要：在外加纵向磁场作用下对低碳钢表面进行Fe5自熔合金等离子弧堆焊,对堆焊试样进行硬度和耐磨量试验,采用显微电镜和金相显微镜对堆焊层显微组织进行分析,系统地研究了磁场强度和磁场频率对堆焊层金属的硬度和耐磨性的影响规律。试验结果表明:外加纵向磁场通过电磁搅拌作用可细化堆焊层金属的组织,并控制硬质相的形态及分布;堆焊层的硬度和耐磨性随磁场的参数变化而变化并存在最佳值,在适当的磁场参数作用下电磁搅拌达到最佳效果,从而提高堆焊层金属的综合力学性能。Longitudinal magnetic field was used during low carbon steel plasma arc surfacing.After PLA with magnetic field,the SEM,wear loss tests,micro-hardness tests were used to analyses the effect of magnetic field current and frequency on properties of overlay deposit.The results indicated that electromagnetic stirring could improve the shape and distribution of hard phase.It also could refine and uniform degree of primary crystallization structure.The hardness and wear resistant varied with magnetic field frequency.When the magnetic field parameters in an optimally value,the overlay deposit was optimally refined,and the best value of the hardness and wear resistant was existent.The properties of overlay deposit were improved.

关 键 词：等离子弧堆焊 纵向磁场 电磁搅拌 力学性能 

分 类 号：TG455[金属学及工艺—焊接]