磁场电流对Fe5堆焊层显微组织和力学性能的影响
Effect of Magnetic Field Current on Microstructure and Properties of Fe5 Deposited Metal
冯丽锋1， 宋 欣1， 苏允海2， 刘政军2
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作者单位：1.辽阳市锅炉压力容器检验研究所，辽宁 辽阳 111000；2.沈阳工业大学 材料科学与工程学院，辽宁 沈阳 110178
中文关键字：横向直流磁场； 堆焊； 组织性能
英文关键字：direct current magnetic field； surfacing； microstructure and properties
中文摘要：在Fe5自熔堆焊合金的等离子弧堆焊过程中引入直流横向磁场，通过外加磁场对电弧和熔池的作用，改善堆焊层的组织，提高堆焊层的综合力学性能。对不同规范下的试件进行硬度、磨损试验和显微组织分析，研究磁场电流对堆焊层显微组织和力学性能的影响规律。结果表明，施加磁场的堆焊层要比无磁场作用的堆焊层硬度高、耐磨性好；当磁场电流为3 A时，堆焊层性能取得最佳值，其耐磨性最好，硬度最高。
英文摘要：Fe5 deposited metal was overlaid on low carbon steel by plasma arc surfacing with transverse magnetic field. The microstructure and properties of the overlayer improve by the effect of magnetic field. The parameters of magnetic field and welding process was altered during welding progress. After PLA with magnetic field, wear loss test, microhardness test and microstructure, the effects of magnetic field on the microstructure and properties of overlay deposit were investigated. The results indicate that the properties of overlayer with magnetic field are better than that without magnetic field. The optimum properties of the overlayer are obtained when I=3 A, the hardness is highest and the wear loss is lowest.