焊管2026，Vol.49Issue(3)：62-66,72,6.DOI:10.19291/j.cnki.1001-3938.2026.03.009
CeO2对复合粉粒明弧堆焊过程及堆焊层性能的影响
Effect of CeO2 on Composite Powder Particles Open Arc Surfacing Process and Surfacing Layer Performance
摘要
Abstract
To enhance the wear resistance of the surfacing layer and investigate the effects of rare earth element on the welding process,CeO2 with varying contents(0,2%,4%,6%)was added to the composite powder particles to study its impact on the characteristics of open arcsurfacing,weld morphology,and dilution rate.The results indicate that the addition of CeO2reduces the effective ionization voltage of the arc atmosphere,thus causing the arc to expand outward and elongate,increasing the voltage from 40.6 V to 41.9 V.Arc expansion improves heat input and the powder particle melting efficiency,increasing the powder particles filling rate from 42.6%to 46.9%.The weld width increases while the depth decreases,with the maximum dilution rate reduced by approximately 34%,and the fusion line transformed from a bowl shape to an arc shape.An elevated proportion of composite powder particles in the surfacing melt,coupled with a reduced base metal dilution rate,enhances the concentration of alloying elements in the microstructure,thereby facilitating increased carbide formation.By influencing the behavior of the welding arc and molten pool,CeO2 optimizes the formation and microstructure characteristics of the surfacing layer.关键词
CeO2/复合粉粒/堆焊/电弧扩展/稀释率Key words
CeO2/composite powder particles/surfacing/arc expansion/dilution rate分类
矿业与冶金引用本文复制引用
刘超,杨明,罗俊财..CeO2对复合粉粒明弧堆焊过程及堆焊层性能的影响[J].焊管,2026,49(3):62-66,72,6.基金项目
湖南省自然科学基金"复合粉粒明弧堆焊耐磨合金的方法及其性能研究"(项目编号2021JJ30669). （项目编号2021JJ30669）
