外加电场电化学诱导氧流对埋弧焊熔渣氧化性的调控效应  

Regulation Effect of External Electric Field Inducing Oxygen Flow on Molten Slag Oxidation in Submerged Arc Welding

作　　者：李晓泉[1] 杨宗辉[1] 初雅杰[1] 

机构地区：[1]南京工程学院材料工程学院,南京211167

出　　处：《航空材料学报》2013年第6期27-32,共6页Journal of Aeronautical Materials

基　　金：国家自然科学基金资助项目(51075197);江苏省科技支撑工业计划资助项目(BE2012186)

摘　　要：实施埋弧焊接过程中,在电弧后部熔渣和液态金属间施加一直流外电场,诱导熔渣中自由氧离子形成定向迁移,达到在熔渣碱度不改变的情况下,实现对其氧化行为的电化学调控。运用法拉第电解定律定量探讨外电场作用对渣金界面电化学反应所致熔池金属氧含量变化的影响。理论计算和实验分析表明,利用电场改变流经渣金的电流大小及调整焊接速率、熔合比等工艺因素,可在一定程度上调控焊缝金属中氧含量,并对焊缝中活性合金元素的冶金行为及夹杂物的形成产生一定的影响。During submerged arc welding,the direct current external electric field between molten slag and liquid metal was applied behind the arc to induce directional migration for free oxygen ion,so as to regulate electrochemical oxidation behavior with no change basicity index of molten slag.The variation of oxygen content in weld pool is caused by electrochemical reactions,which occurs at interface of slag-metal for external electric field was studied quantitatively based on Faraday law of electrolysis.Theoretical calculation and experimental test show that the oxygen content of weld metal can be regulated in certain degree with the change of current between slag and metal by external electric field change or regulating technological factors such as weld speed,fusion ration,and it may also influence the metallurgy behavior of active alloying elements in weld metal as well as the formation of inclusion.

关 键 词：外电场 埋弧焊 熔渣 电化学反应 

分 类 号：TG422.3[金属学及工艺—焊接] V261.3[航空宇航科学与技术—航空宇航制造工程]