摘要
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。
WC particles reinforced hardfacing layer was prepared by flux cored wire submerged arc welding. The effects of welding layers on the microstructure and properties were investigated through optical microscopy, scan electron microscope （SEM）, micro-hardness tester, macro-hardness tester and MLS-23 wet sand rubber wheel tester. The results show that both the macro-hardness and wear resistance increase firstly and reduce at last with the increase of welding layers. When the matrix is deposited for three welding layers, the wear resistance of the layer is about 30 times higher than that of Q235 steel, which corresponds to WC particles distributing uniformly in the hardfacing layer.
出处
《热加工工艺》
CSCD
北大核心
2015年第21期187-189,共3页
Hot Working Technology
基金
湖南省教育厅科学研究项目(14C1137)
关键词
WC
原位合成
稀释率
耐磨性
WC
in-situ synthesizing
dilution rate
wear resistance
