激光-MAG复合焊接头热影响区热循环特性研究  

Study on the Thermal Cycle Characteristic in Heat Affected Zone Welded by Laser-MAG Hybrid Welding

作　　者：李治[1] 薛钢[1] 吴艳明[1] 张成杰[1] 张俊旭[1] 

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2016年第3期57-60,共4页Development and Application of Materials

基　　金：船舶预研支撑技术基金项目(14J1.6.6)

摘　　要：采用K型热电偶测量了激光-MAG复合焊接头热影响区热循环曲线,分析了激光-MAG复合焊接头热循环特性。研究结果表明,对于同一激光-MAG复合焊接头不同深度位置,热循环冷却时间相近;升温时间、Ac1温度以上停留时间、最大瞬时升(降)温速率、峰值温度梯度及衰减速率均存在一定差异。其中,越靠近试板上表面,升温时间越长,Ac1温度以上停留时间越长、最大瞬时升(降)温速率越小、峰值温度衰减越慢。当距离焊缝中心一定距离后,不同深度位置峰值温度梯度及衰减幅度均趋于一致。Thermocouple was adopted to analyze the characteristics of thermal cycle in the heat affected zone welded by laser- MAG hybrid welding. The results reveal that the cooling time of the thermal cycle was nearly the same for different positions in the joint. The closer the position was from upper surface and the longer heating procedure was, the longer the residence time upon Acl temperature became, and the lower the instantaneous velocity of heating or cooling procedure and the attenuation velocity of the peak temperature were. The gradient and attenuation of peak temperatures at different depths that were a certain distance from the seam center tended to be the same.

关 键 词：激光-MAG复合焊 热循环 不对称性 

分 类 号：TG456.7[金属学及工艺—焊接]