耐冲蚀磨损堆焊焊条及性能研究  

Erosion-resistant wear surfacing electrode and its performance research

作　　者：李嘉祺[1] 杨可[1] 庄白亮 徐先宜 包晔峰[1] 蒋永锋[1] LI Jiaqi;YANG Ke;ZHUANG Bailiang;XU Xianyi;BAO Yefeng;JIANG Yongfeng(College of Mechanical and Electronic Engineering,Hohai University,Changzhou 213022,China;Jiangsu Ins-titute,China Academy of Machinery Science&Technology Co.,Ltd.,Changzhou 213164,China)

机构地区：[1]河海大学机电工程学院,江苏常州213022 [2]机械科学研究总院江苏分院有限公司,江苏常州213164

出　　处：《电焊机》2018年第9期115-118,共4页Electric Welding Machine

基　　金：国家自然科学基金资助项目(51101050);江苏省自然科学基金资助项目(BK20141156);国家重点研发计划资助项目(2017YFE0100100)

摘　　要：研制出一种耐冲蚀磨损堆焊焊条,在低碳钢Q235上进行堆焊试验,研究堆焊层金属显微组织及其耐冲蚀磨损性能。结果表明,该焊条具有良好的焊接工艺性能,堆焊过程中飞溅较小,电弧稳定,焊缝成形美观,脱渣性较好,未发现气孔、裂纹等明显焊接缺陷。堆焊层金属显微组织主要为板条马氏体和大量细小弥散分布的碳氮化物析出相;析出相沿基体晶界和晶内均匀析出,产生析出强化作用;堆焊层金属硬度分布均匀,平均硬度为HRC43.8,具有良好的使用性能。与ZG35Si Mn材料相比,堆焊层金属的耐冲蚀磨损性能提高了0.87倍,可用于冲蚀磨损破坏严重部件的制造与修复。In this paper,an erosion-resistant wear surfacing electrode was developed and a surfacing welding test was performed on the low-carbon steel Q235.The microstructure and wear resistance of the surfacing layer metal were studied.The results show that the welding rod has good welding process performance,less spatter in the surfacing process,stable arc,beautiful appearance of the weld seam,good slag detachability,and no obvious welding defects such as pores and cracks.The microstructure of the surfacing layer metal is mainly composed of lath martensite and a large number of finely dispersed carbonitride precipitates;precipitation has a strong precipitation strengthening effect on the martensite matrix;the metal hardness of the surfacing layer is evenly distributed.The average hardness is HRC43.8,with good performance.Compared with ZG35SiMn,the erosion wear resistance of the surfacing layer metal is nearly increased by 0.87 times.It can be used for the manufacture and repair of severely damaged erosion wear parts.

关 键 词：堆焊焊条 耐冲蚀磨损 析出相 

分 类 号：TG422.1[金属学及工艺—焊接]