坡口角度对SK7钢/AZ31B镁合金搭接接头成形和力学性能的影响

doi:10.3901/JME.2024.23.262

机械工程学报 ›› 2024, Vol. 60 ›› Issue (23): 262-269.doi: 10.3901/JME.2024.23.262

扫码分享

坡口角度对SK7钢/AZ31B镁合金搭接接头成形和力学性能的影响

郎强, 宋刚, 刘黎明

大连理工大学辽宁省先进连接技术重点实验室大连 116024

收稿日期:2023-12-07 修回日期:2024-08-01 出版日期:2024-12-05 发布日期:2025-01-23
作者简介:郎强，男，1995年出生，博士研究生。主要研究方向为镁钢异种金属激光电弧复合焊接结构设计和工艺优化。E-mail：LQiang_dlut@163.com;宋刚(通信作者)，男，1978年出生，博士，教授，博士生研究导师。主要研究方向为激光诱导电弧智能焊接技术及装备、镁钢异种金属界面设计、焊轧复合成形技术。E-mail：songgang@dlut.edu.cn
基金资助:
国家重点研发计划(2022YFB4600900)、国家自然科学基金(U1960111)和辽宁省应用基础研究计划(2023JH2/101300157)资助项目。

Effect of Groove Angles on Forming and Mechanical Properties of SK7 Steel/AZ31B Magnesium Alloy Lap Joint

LANG Qiang, SONG Gang, LIU Liming

Liaoning Province Key Laboratory of Material Welding and Joining Technology, Dalian University of Technology, Dalian 116024

Received:2023-12-07 Revised:2024-08-01 Online:2024-12-05 Published:2025-01-23

摘要/Abstract

摘要： 针对钢在上、镁合金在下的特殊搭接结构需求，提出了激光诱导TIG电弧复合填丝焊接工艺，填AZ61镁合金焊丝焊接SK7碳素工具钢和AZ31B镁合金，重点研究了坡口角度对焊接接头成形和力学性能的影响规律，分析了接头断裂行为与性能强化机制。结果表明，坡口的存在，改变了接头断裂模式，消除了钢侧壁冶金结合弱成为裂纹源的问题，增加了坡口处SK7/AZ61界面冶金反应面积，改善了焊丝在基体两侧的铺展。焊接接头性能随坡口角度的增加而增加，当坡口角度θ=75°时，接头线载荷达到117.36 N/mm。电弧向坡口的偏转放电转移了电弧热分布区域，保障了镁合金基体的背部完整性。作用在坡口处的激光束提高了SK7/AZ61界面的冶金反应温度，SK7/AZ61界面高温冶金反应生成的Fe₃Al IMC和AZ61/AZ31B界面的同质熔合是实现接头可靠连接的关键，而脉冲激光在坡口上形成的匙孔的锁孔效应强化了接头性能。

关键词: 激光诱导电弧复合焊, 异种金属, 搭接焊, 镁合金, 钢, 坡口, 锁孔效应

Abstract: A laser-induced TIG arc hybrid welding process with wire filling is proposed to weld carbon tool steel SK7 and magnesium alloy AZ31B with magnesium alloy AZ61 wire. The influence of groove angles on the forming and mechanical properties of the welded joint is studied, and the fracture behavior and performance strengthening mechanism of the joint are analyzed. The results show that the existence of the groove changes the fracture mode of the joint, eliminates the problem of weak metallurgical bonding of the steel side wall as the source of cracks, increases the metallurgical reaction area of the SK7/AZ61 interface at the groove, and improves the spreading of the welding wire on both sides of the matrix. The performance of the welded joint increases with the increase of the groove angle. When the groove angle is θ=75°, the linear load of the joint reaches 117.36 N/mm. The deflection discharge of the arc to the groove transfers the arc heat distribution area, and ensures the integrity of the back of the magnesium alloy matrix. The laser beam acting on the groove raises the metallurgical reaction temperature of the SK7/AZ61 interface. The homogeneous fusion of the AZ61/AZ31B interface and the Fe₃Al IMC generated by the high temperature metallurgical reaction of the SK7/AZ61 interface is the key to realize the reliable bonding of the joint, and the keyhole effect of the keyhole formed by the pulsed laser on the groove strengthens the joint performance.

Key words: laser-induced arc hybrid welding, dissimilar metal, lap welding, magnesium alloy, steel, groove, keyhole

中图分类号:

TG457

郎强, 宋刚, 刘黎明. 坡口角度对SK7钢/AZ31B镁合金搭接接头成形和力学性能的影响[J]. 机械工程学报, 2024, 60(23): 262-269.

LANG Qiang, SONG Gang, LIU Liming. Effect of Groove Angles on Forming and Mechanical Properties of SK7 Steel/AZ31B Magnesium Alloy Lap Joint[J]. Journal of Mechanical Engineering, 2024, 60(23): 262-269.

参考文献

[1] 谭军，王芳磊，蒋斌，等. 镁合金结构材料应用现状与展望[J]. 自然杂志，2023，45(2)：93-105. TAN Jun，WANG Fanglei，JIANG Bin，et al. Current status and prospects of application of magnesium alloy structural materials [J]. Chinese Journal of Nature，2023，45(2)：93-105.
[2] 闫志飞，田光元，苏辉，等. 高性能镁合金的研究进展[J]. 铸造技术，2023(2)：101-113. YAN Zhifei，TIAN Guangyuan，SU Hui，et al. Research progress of high-performance magnesium alloys [J]. Foundry Technology，2023(2)：101-113.
[3] 冯吉才，王亚荣，张忠典. 镁合金焊接技术的研究现状及应用[J]. 中国有色金属学报，2005(2)：165–178. FENG Jicai，WANG Yarong，ZHANG Zhongdian. Research status and application of welding technology for magnesium alloys [J]. The Chinese Journal of Nonferrous Metals，2005(2)：165–178.
[4] 孙德新，孙大千，李金宝，等. 镁合金焊接技术的研究进展及应用[J]. 材料导报，2006(8)：122-126. SUN Dexin，SUN Daqian，LI Jinbao，et al. Research progress and application of welding technology for magnesium alloys [J]. Materials Review，2006(8)：122-126.
[5] LANG Q，ZHANG Z D，WANG Z L，et al. Consumable-free dissimilar joining of Mg to steel using a laser-arc hybrid heat source[J]. Materials Characterization，2023，204：113134.
[6] REN D X，LIU L M. Interface microstructure and mechanical properties of arc spot welding Mg–steel dissimilar joint with Cu interlayer[J]. Materials and Design，2014，59：369–376.
[7] ZHOU H，LIU J S，ZHOU D W，et al. Effect of Al-foil addition on microstructure and temperature field of laser fusion welded joints of DP590 dual-phase steel and AZ31B magnesium alloy[J]. Trans. Nonferrous Met. Soc. China，2020，30：2669-2680.
[8] Casalino G，Guglielmi P，Lorusso V D，et al. Laser offset welding of AZ31B magnesium alloy to 316 stainless steel[J]. Journal of Materials Processing Technology，2017，242：49-59.
[9] CAO R，ZHU H X，WANG Q，et al. Effects of zinc coating on magnesium alloy–steel joints produced by cold metal transfer method[J]. Materials Science and Technology，2016，(18)32：1805–1817.
[10] CAO R，CHANG J H，HUANG Q，et al. Behaviors and effects of Zn coating on welding-brazing process of Al-Steel and Mg-steel dissimilar metals[J]. Journal of Manufacturing Processes，2018，31：674–688.
[11] LI L Q，TAN C W，CHEN Y B，et al. Comparative study on microstructure and mechanical properties of laser welded–brazed Mg/mild steel and Mg/stainless steel joints[J]. Materials and Design，2013，43：59–65.
[12] QI X D，SONG G. Interfacial structure of the joints between magnesium alloy and mild steel with nickel as interlayer by hybrid laser-TIG welding[J]. Materials and Design，2010，31：605–609.
[13] 时尚，刘丰刚，黄春平，等. 激光复合热源焊接技术的研究进展[J]. 材料导报，2022，36(11)：20100230. SHI Shang，LIU Fenggang，HUANG Chunping，et al. Research progress of laser hybrid heat source welding technology [J]. Materials Review，2022，36(11)：20100230.
[14] 刘秀航，高向东，孙友松，等. 激光-电弧复合焊接技术研究现状[J]. 热加工工艺，2022，51(7)：7-11. LIU Xiuhang，GAO Xiangdong，SUN Yousong，et al. Research status of laser-arc hybrid welding technology [J]. Hot Working Technology，2022，51(7)：7-11.
[15] SONG G，LI T T，CHI J Y，et al. Bonding of immiscible Mg/steel by butt fusion welding[J]. Scripta Materialia，2018，157：10–14.
[16] SONG G，LI T T，CHEN L. The mechanical properties and interface bonding mechanism of immiscible Mg/steel by laser–tungsten inert gas welding with filler wire[J]. Materials Science & Engineering A，2018，736：306–315.
[17] CHEN MH，LIU LM. Study on attraction of laser to arc plasma in laser-TIG hybrid welding on magnesium alloy[J]. IEEE Transactions on Plasma Science，2011，39(4)：1104-1109.
[18] CHEN MH，LI CB，LIU LM. Coupling discharge between keyhole plasma and arc plasma in laser-arc welding of Mg alloy[J]. Transactions on Plasma Science，2014，42(5)：1400-1406.
[19] Kubaschewski O. IRON-Binary Phase Diagrams[M]. Springer：Verlag Berlin Heide1berg，1982.
[20] YUNG D. Phase diagrams of the elements[M]. Berkeley：University of California Press，1991.
[21] LI X，HU ZL，LAI J，et al. A new understanding of laser-arc plasma interaction of hybrid welding based on arc layering behaviors[J]. Journal of Manufacturing Processes，2023，88：125–133.

坡口角度对SK7钢/AZ31B镁合金搭接接头成形和力学性能的影响

Effect of Groove Angles on Forming and Mechanical Properties of SK7 Steel/AZ31B Magnesium Alloy Lap Joint

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价

[1]	孔玲, 王玉辉, 杨浩坤, 彭艳. Fe-Mn-Al-C系奥氏体基低密度钢使役性能研究进展[J]. 机械工程学报, 2024, 60(8): 34-47.
[2]	蒋飞, 赵升吨, 范淑琴, 王可心, 陈超. 剥肋滚压复合工艺及其设备研究[J]. 机械工程学报, 2024, 60(8): 132-142.
[3]	杨阳, 王泽奎, 陈晨, 马华, 杨志南, 张福成. Ni和Cu合金化对Fe-Mn-Al-C奥氏体轻质钢微观组织和力学性能的影响[J]. 机械工程学报, 2024, 60(8): 154-164.
[4]	顾玉芬, 鲁娜, 石玗, 孙青岭. 16MnDR钢焊接接头组织特性及在氢氟酸环境中的腐蚀行为[J]. 机械工程学报, 2024, 60(8): 196-203.
[5]	杨思愚, 徐连勇, 赵雷, 韩永典. EH36钢焊接接头预腐蚀下的疲劳性能及断裂机制研究[J]. 机械工程学报, 2024, 60(8): 204-211.
[6]	李坤, 吉辰, 白生文, 蒋斌, 潘复生. 高性能镁合金电弧增材制造技术研究现状与展望[J]. 机械工程学报, 2024, 60(7): 289-311.
[7]	陈伟, 赵杰, 朱利斌, 曹海波. 增材制造低活化钢研究现状及展望[J]. 机械工程学报, 2024, 60(7): 312-333.
[8]	郑洋, 赵梓昊, 刘伟, 余政哲, 牛伟, 雷贻文, 孙荣禄. 高性能镁合金增材制造技术研究进展[J]. 机械工程学报, 2024, 60(7): 385-400.
[9]	郑学斌, 韩龙帅, 李学涛, 鄂宏伟, 吴向东, 万敏. DP780双相钢U弯回弹预测影响因素研究[J]. 机械工程学报, 2024, 60(6): 197-206.
[10]	戴明华, 胡平, 盈亮, 陈帅, 王永青, 韩小强. 考虑损伤的热成形淬硬硼钢失效行为建模研究[J]. 机械工程学报, 2024, 60(6): 218-226.
[11]	任忠凯, 李赫, 许雅楠, 程前, 冯浩, 王涛. 脉冲电场辅助碳素钢极薄带拉伸变形的本构模型和微观组织演变[J]. 机械工程学报, 2024, 60(6): 245-260.
[12]	王博士, 陈楠楠, 蔡艳, 王敏. 低合金贝氏体高强钢模拟焊接粗晶热影响区低温疲劳韧脆转变行为及机制[J]. 机械工程学报, 2024, 60(6): 271-278.
[13]	胡龙, 刘红艳, 成慧梅, 陈维奇, 冯广杰, 叶延洪, 邓德安. 超高强耐磨钢NM500多层多道对接接头残余应力的研究[J]. 机械工程学报, 2024, 60(4): 335-344.
[14]	冯青松, 杨舟, 郭文杰. 基于振幅放大机制的周期钢弹簧浮置板轨道结构低频振动控制[J]. 机械工程学报, 2024, 60(3): 155-169.
[15]	宋军, 唐倩, 罗智超, 冯琪翔, 聂云飞, 任治好. 马氏体时效钢激光选区熔化成形过程介观尺度数值模拟[J]. 机械工程学报, 2024, 60(3): 282-295.