高氮钢复合焊接电弧能量对焊接接头性能影响  

Effect of Arc Energy on Performance of Welded Joint with High Nitrogen Steel

作　　者：辛秀成 张今捷 黄根哲[1] 张宏[1] 王金钢[1] Xin Xiucheng;Zhang Jinjie;Huang Genzhe;Zhang Hong;Wang Jingang(College of Mechanical and Electric Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, China)

机构地区：[1]长春理工大学机电工程学院,吉林长春130022

出　　处：《应用激光》2017年第5期668-673,共6页Applied Laser

摘　　要：以8mm厚的高氮钢板为试验材料,采用额定功率为4kW的Nd:YAG固体激光器对其进行了激光-电弧复合焊接,研究了不同电弧能量对焊接接头性能的影响。研究表明,随着电弧能量的增加,焊接表面质量有所提高;焊缝的熔深及熔宽随电弧能量的增加而增大,且熔深较熔宽增加更明显,热影响区范围随电弧能量增加而增大;随着电弧能量的增加,熔池熔滴过渡由滴状过渡转变为射流为主、射滴为辅的过渡形式;焊接接头的硬度值随着电弧能量的增加呈整体下降趋势,且造成硬度下降的原因是焊接接头的氮含量随热输入的增加而降低。The Nd：YAG solid-state lasers with rated power of 4 KW were laser-arc hybrid welding with high nitrogen steel plate with 8 mm thickness as the test material,the effects of different arc energy on the performance of welded joints were studied.By means of this,With the increase of arc energy,the welding surface quality has improved;the weld penetration and the width increase with the increase of the arc energy,and the penetration depth is more obvious than the melting width,and the heat affected zone increases with the increase of the arc energy;with the increase of arc energy,the droplet transfer of molten pool is changed from droplet transition to jet,and the transition form is the auxiliary form;the hardness of the welded joint decreases as the arc energy increases,and the reason for the decrease in hardness is that the nitrogen content of the welded joint decreases with increasing heat input.

关 键 词：高氮钢 激光-电弧复合焊接 电弧能量 接头性能 

分 类 号：TG456.7[金属学及工艺—焊接]