不锈钢电弧辅助活性TIG焊熔池表面张力变化机理  

Mechanism of Changes in the Surface Tension of Stainless Steel Arc-AssistedActivating TIG Welding Molten Pool

作　　者：刘自刚 樊丁[2] 黄勇[2] 刘云华 周晓静 朱婷婷 LIU Zigang;FAN Ding;HUANG Yong;LIU Yunhua;ZHOU Xiaojing;ZHU Tingting(Noblelift Intelligent Equipment Co.,Ltd.,Huzhou 313100,Zhejiang,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Engineering Research Center of Intelligent Logistics Equipment of Zhejiang Province,Huzhou 313100,Zhejiang,China)

机构地区：[1]诺力智能装备股份有限公司,浙江湖州313100 [2]兰州理工大学材料科学与工程学院,兰州730050 [3]浙江省智能物流装备工程技术研究中心,浙江湖州313100

出　　处：《材料导报》2022年第17期170-175,共6页Materials Reports

基　　金：国家自然科学基金(51074084)。

摘　　要：本工作针对不锈钢电弧辅助活性钨极氩弧焊,采用一套骤冷装置,保留熔池的高温状态,然后截取骤冷的表层金属并重熔,利用座滴法测试熔池的表面张力,进行了表面张力温度系数变化机理的分析,研究了活性元素对熔池表面张力的影响,同时验证了表面张力温度系数改变理论。测试结果表明:当辅助电弧中不引入O_(2)时,熔池的表面张力温度系数为负值;当辅助电弧中O_(2)引入量为1.0 L/min和1.5 L/min时,熔池的表面张力温度系数为正值;当辅助电弧中O_(2)引入量达到2.0 L/min时,熔池的表面张力温度系数再次变为负值。经过分析测试骤冷熔池中的O元素分布,认为O元素在熔池表面的富集导致熔池表面张力的减小和熔池表面张力温度系数的改变。For stainless steel arc assisted activating tungsten inert gas welding,this paper used a drop method to test the surface tension of molten pool.In order to keep the high temperature state of molten pool,this paper adopted a quenching device to cooling molten pool rapid,and then cut off quenching surface layer metal and then remelt it.The mechanism of active element to affect the surface tension and temperature coefficient of molten pool was analyzed.The results show that the surface tension temperature coefficient of the molten pool is negative when no O_(2) is introduced into the auxiliary arc,while with the amount of O_(2) introduced into the auxiliary arc 1.0 L/min or 1.5 L/min,the surface tension temperature coefficient of the molten pool is positive,and when the amount of O_(2) introduced reaches 2.0 L/min,the surface tension temperature coefficient of the molten pool becomes negative again.After measuring and analyzing the distribution of oxygen element in the quench bath,it can be concluded that the concentration of oxygen element on the surface of the weld pool leads to the decrease of the surface tension and the change of the surface tension temperature coefficient of motten pool.

关 键 词：不锈钢 AA-TIG焊 表面张力 表面张力温度系数 

分 类 号：TG444[金属学及工艺—焊接]