横向磁场频率对Fe5堆焊合金组织性能的影响

Effect of Transverse Magnetic Field Frequency on Microstructure and Properties of Fe5 Deposited Metal

横向交流磁场被引入到Fe5自熔堆焊合金的等离子弧堆焊过程中,通过外加磁场的电磁搅拌作用,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、磨损实验和显微组织分析,研究磁场频率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f=20Hz,I=2A时,堆焊层性能取得最佳值,其中磨损量为△G=0.0384g,硬度为59.3HRC。

The Fe5 deposited metal was overlaid on low carbon steel by plasma arc surfacing with transverse magnetic field. The properties of overlay surface were improved by the effect of magnetic field. The parameters of magnetic field and welding were altered during welding process. After PLA with magnetic field, wear loss test, micro-hardness test and microstmcture were used to analyze the effect of magnetic field on properties of overlay deposit. The results indicate that the properties of overlay deposit with magnetic field are better than which is without magnetic field. The optimally value of overlay deposit is obtained when f=20 Hz,I=2 A, which is △G=0.0384 g, 59.3 HRC.