采用药芯焊丝埋弧焊方法原位制备了WC颗粒增强铁基耐磨堆焊合金层,借助光学显微镜、扫描电镜、显微硬度计、宏观硬度计以及磨粒磨损试验机等实验仪器,对比研究了不同焊接层数对堆焊合金层的显微组织及耐磨性的影响。结果表明,随着焊接层数的增加,堆焊层的硬度与耐磨性都呈先增加后下降的变化规律。当在基体上堆焊三层时,硬质相WC均匀分布在堆焊层中,其耐磨性达到最佳,是Q235钢的30倍左右。 The WC grain reinforced iron-based hardfacing alloy layer was prepared in situ by the method of submerged arc welding with flux-cored wire. By means of optical microscope, scanning electron microscope, microhardness tester, macro-hardness tester and abrasive wear tester, The effects of different welding layers on the microstructure and wear resistance of the surfacing alloy layer were studied. The results show that with the increase of the number of welding layers, the hardness and wear resistance of the surfacing layer firstly increase and then decrease. When the three-dimensional surfacing on the substrate, the hard phase WC evenly distributed in the surfacing layer, the wear resistance to achieve the best, is about 30 times the Q235 steel.