Q235钢CMT对接焊接工艺研究  

Research on CMT butt welding process of Q235 steel

作　　者：张翔 李冰洁 韩善果 王瑞超 ZHANG Xiang;LI Bingjie;HAN Shanguo;WANG Ruichao(Wuyi University,Jiangmen 529000,Guangdong,China;Yangjiang Zhongwu Barton Technology Research Institute,Yangjiang 529500,Guangdong,China;Sino-Ukrainian Welding Research Institute,Guangdong Academy of Sciences,Guangzhou 510000,Guangdong,China)

机构地区：[1]五邑大学,广东江门529000 [2]阳江市中乌巴顿技术研究院,广东阳江529500 [3]广东省科学院中乌焊接研究所,广东广州510000

出　　处：《金属加工(热加工)》2025年第3期100-105,共6页MW Metal Forming

基　　金：阳江市科技项目(SDZX2022007、SDZX2022009、RCZX2022024、SDZX2022002)。

摘　　要：采用冷金属过渡(CMT)焊接技术对Q235钢实现对接焊接,并对其力学性能进行检测,进一步分析了焊接接头的组织与性能的关系。首先,通过焊接参数优化,筛选出部分成形质量优良的焊接接头。其次,通过金相检测对焊接试样显微组织进行分析,经对比发现,45°坡口工艺参数下成形良好;观察其组织发现,焊缝区域、完全重结晶区、部分重结晶区和母材区在显微组织上有显著差异;对应性能在强度和硬度方面也有明显不同:对接接头试样的抗拉强度在不同坡口角度下表现出差异,30°和45°坡口的抗拉强度显著高于60°坡口,这与坡口角度导致的热输入差异有关。研究结果为Q235钢的CMT焊接工艺提供了理论支持,促进了CMT焊接在工业上的应用。Use cold metal transfer(CMT)welding technology to realize butt welding of Q235 steel,and detects its mechanical properties,further analyzing the relationship between the structure and performance of the welded joint.First,through welding parameter optimization,some welded joints with excellent forming quality were screened out.Secondly,the microstructure of the welded sample was analyzed using metallographic means.After comparison,it was found that the 45°groove formed well under the process parameters;observing the structure,it was found that the weld area,complete recrystallization area,partial recrystallization area and base metal area Significant differences in microstructure;The corresponding properties are also significantly different in terms of strength and hardness:the tensile strength of butt joint specimens shows differences at different bevel angles,and the tensile strength of 30°and 45°bevels is significantly higher than that of 60°bevels,which is consistent with It is related to the difference in heat input caused by the groove angle.The results of this study provide theoretical support for the CMT welding process of Q235 steel and promote the application of CMT welding in industry.

关 键 词：CMT Q235钢 显微组织 力学性能 焊接工艺 

分 类 号：TG1[金属学及工艺—金属学]