电弧电流对AZ31B/DP980激光诱导电弧焊接接头成形及力学性能的影响

doi:10.11868/j.issn.1001-4381.2021.001051

摘要
图/表
参考文献
相关文章
Metrics

全文: PDF(22155 KB)

HTML ( 0 )
输出: BibTeX | EndNote (RIS)

摘要

采用激光诱导钨极惰性气体保护(tungsten inert gas, TIG)电弧焊接技术，在未添加任何夹层和镀层的条件下，通过优化工艺，获得了AZ31B镁合金和DP980高强钢高质量搭接焊接头，重点研究TIG电弧电流对焊接接头成形和力学性能的影响规律。结果表明：电弧电流的增大会提高镁合金在高强钢的润湿铺展能力，提升焊缝宽度的同时减小润湿角。镁合金/钢焊接接头的最大拉伸载荷随着电弧电流的增大先升高后降低，接头断裂模式由沿界面断裂转变为沿焊缝断裂。当TIG电流为80 A、激光功率为350 W时，焊接接头最大平均拉伸载荷达到279 N/mm。焊缝宽度和界面层厚度的增大以及激光匙孔的钉扎作用共同提升了镁合金/钢的接头性能。

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	宋刚
	李传瑜
	郎强
	刘黎明

关键词 ：激光诱导电弧, 镁合金, 高强钢, 接头成形, 力学性能

Abstract：

Without adding any interlayers or coatings, the lap welding experiment of AZ31B magnesium alloy and DP980 high-strength steel was performed with the laser-induced tungsten inert gas welding (TIG) arc technology. Through optimizing the process parameters, a high-quality lap weld joint was obtained. The effect of TIG arc current on the forming and mechanical properties of the joint was studied significantly. The results indicate that the wetting and spreading ability of magnesium alloy in high-strength steel is improved with the increase of arc current, which increases the weld width and reduces the wetting angle. Additionally, the maximum tensile load of magnesium alloy/steel welded joints increases first and then decreases with the increase of arc current and the fracture mode of the joint is changed from fracture along the interface to fracture along the weld. When the TIG current is 80 A and the laser power is 350 W, the maximum average tensile load of the welded joint reaches 279 N/mm.The increase of weld width, thickness of interfacial layer and pinning of laser keyholes together enhance the performance of magnesium alloy/steel joints.

Key words： laser-induced arc magnesium alloy high-strength steel joint forming mechanical property

收稿日期: 2021-11-02 出版日期: 2022-06-20

中图分类号:

TG444

基金资助:国家自然科学基金资助项目(U1960111);中央高校基本科研业务费专项资金项目(DUT21LAB133)

通讯作者: 宋刚 E-mail: songgang@dlut.edu.cn

作者简介: 宋刚(1978—)，男，教授，博士，研究方向为轻量化材料连接，联系地址：辽宁省大连市甘井子区凌工路2号大连理工大学铸造工程研究中心(116024)，E-mail: songgang@dlut.edu.cn

引用本文:

宋刚, 李传瑜, 郎强, 刘黎明. 电弧电流对AZ31B/DP980激光诱导电弧焊接接头成形及力学性能的影响[J]. 材料工程, 2022, 50(6): 131-137.
Gang SONG, Chuanyu LI, Qiang LANG, Liming LIU. Effect of arc current on forming and mechanical properties of AZ31B/DP980 laser-induced arc welded joint. Journal of Materials Engineering, 2022, 50(6): 131-137.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2021.001051 或 http://jme.biam.ac.cn/CN/Y2022/V50/I6/131

Table 1 AZ31B镁合金的主要化学成分(质量分数/%)

Table 2 DP980高强钢的主要化学成分(质量分数/%)

Fig.1 激光诱导电弧搭接焊(a)及拉伸试样(b)示意图

Table 3 焊接工艺参数

Fig.2 镁合金/钢激光诱导电弧焊接接头(1)与横截面(2)宏观图片
(a)50 A; (b)60 A; (c)70 A; (d)80 A; (e)90 A

Fig.3 润湿角与焊缝宽度随TIG电流变化曲线

Fig.4 不同电流下接头最大拉伸载荷曲线

Fig.5 两种断裂情况
(a)沿界面断裂；(b)沿焊缝断裂

Fig.6 电流为80 A时接头金相组织
(a)接头示意图；(b)高强钢熔化区；(c)焊缝；(d)熔合区；(e)热影响区；(f)母材

Fig.7 TIG电流为80 A时接头高强钢熔化区EPMA面扫描
(a)扫描位置；(b)Al；(c)Mg；(d)Fe

Fig.8 不同电流下界面线扫描
(a)扫描方向示意图；(b)70 A；(c)80 A；(d)90 A

Fig.9 断裂模式示意图
(a)界面反应过程；(b)焊接接头；(c)拉剪后断裂；(1)50~70 A；(2)80, 90 A

1	LIYANAGE T , KILBOURNE J , GERLICH A P , et al. Joint formation in dissimilar Al alloy/steel and Mg alloy/steel friction stir spot welds[J]. Science and Technology of Welding and Joining, 2009, 14 (6): 500- 508. doi: 10.1179/136217109X456960
2	SCHUBERT E , KLASSEN M , ZERNER L , et al. Light-weight structures produced by laser beam joining for future applications in automobile and aerospace industry[J]. Journal of Materials Processing Technology, 2001, 115 (1): 2- 8. doi: 10.1016/S0924-0136(01)00756-7
3	LIU L , QI X , WU Z . Microstructural characteristics of lap joint between magnesium alloy and mild steel with and without the addition of Sn element[J]. Materials Letters, 2010, 64 (1): 89- 92. doi: 10.1016/j.matlet.2009.10.023
4	朱海霞, 曹睿, 李雅范, 等. 镁-裸钢板异种金属冷金属过渡熔钎焊连接机理[J]. 焊接学报, 2016, 37 (5): 77- 80.
4	ZHU H X , CAO R , LI Y F , et al. Joining mechanisms of cold me-tal transfer welding-brazing of Mg to bare steel[J]. Transactions of the China Welding Institution, 2016, 37 (5): 77- 80.
5	CAO R , XU Q W , ZHU H X , et al. Weldability and distortion of Mg AZ31-to-galvanized steel SPOT plug welding joint by cold metal transfer method[J]. Journal of Manufacturing Science & Engineering, 2017, 139 (2): 021001.
6	曹睿, 余建永, 陈剑虹, 等. 镁/镀锌钢板CMT熔钎焊连接机制分析[J]. 焊接学报, 2013, 34 (9): 24- 27.
6	CAO R , YU J Y , CHEN J H , et al. Bonding mechanism of CMT fusion-brazed joints between magnesium and galvanized steel[J]. Transactions of the China Welding Institution, 2013, 34 (9): 24- 27.
7	TAN C , XIAO L , LIU F , et al. Influence of laser power on the microstructure and mechanical properties of a laser welded-brazed Mg alloy/Ni-coated steel dissimilar joint[J]. Journal of Materials Engineering & Performance, 2017, 26 (6): 2983- 2997.
8	LI L , TAN C , CHEN Y , et al. Influence of Zn coating on interfacial reactions and mechanical properties during laser welding-brazing of Mg to steel[J]. Metallurgical & Materials Transactions A, 2012, 43 (12): 4740- 4754.
9	SCHNEIDER C , WEINBERGER T , INOUE J . Characterisation of interface of steel/magnesium FSW[J]. Science and Technology of Welding and Joining, 2011, 16 (1): 100- 106. doi: 10.1179/1362171810Y.0000000012
10	王希靖, 车文斌, 刘骁, 等. 镁钢无匙孔搅拌摩擦点焊工艺参数对接头扩散程度的影响[J]. 焊接学报, 2018, 39 (8): 6- 10.
10	WANG X J , CHE W B , LIU X , et al. Influence of friction stir keyholeless spot welding process parameters on the diffusion degree of AZ31B Mg-steel[J]. Transactions of the China Welding Institution, 2018, 39 (8): 6- 10.
11	XU R Z , YANG Q , NI D R , et al. Influencing mechanism of pre-existing nanoscale Al₅Fe₂ phase on Mg-Fe interface in friction stir spot welded Al-free ZK60-Q235 joint[J]. Journal of Mate-rials Science & Technology, 2020, 42 (7): 222- 228.
12	郑森, 程东海, 陈益平, 等. AZ31B镁合金/镀锌钢板电阻点焊接头形成机理[J]. 焊接学报, 2017, 38 (2): 83- 86.
12	ZHENG S , CHENG D H , CHEN Y P , et al. Joint formation mechanism of AZ31B magnesium alloy and SPHC galvanized steel by resistance spot[J]. Transactions of the China Welding Institution, 2017, 38 (2): 83- 86.
13	LI T , SONG G , YU P , et al. Interfacial microstructure evolution in fusion welding of immiscible Mg/Fe system[J]. Materials & Design, 2019, 181, 107903.
14	SONG G , LI 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 and Engineering: A, 2018, 736, 306- 315. doi: 10.1016/j.msea.2018.08.078
15	SONG G , LI T , CHI J , et al. Bonding of immiscible Mg/steel by butt fusion welding[J]. Scripta Materialia, 2018, 157, 10- 14. doi: 10.1016/j.scriptamat.2018.07.031

[1]	王涛, 武传松. 超声对铝/镁异质合金搅拌摩擦焊接成形的影响[J]. 材料工程, 2022, 50(5): 20-34.
[2]	翟海民, 马旭, 袁花妍, 欧梦静, 李文生. 内生非晶复合材料组织与力学性能调控研究进展[J]. 材料工程, 2022, 50(5): 78-89.
[3]	陆腾轩, 孟晓燕, 李狮弟, 邓欣. 硬质合金粉末挤出打印中增材制造工艺及其显微结构[J]. 材料工程, 2022, 50(5): 147-155.
[4]	贾耀雄, 许良, 敖清阳, 张文正, 王涛, 魏娟. 不同热氧环境对T800碳纤维/环氧树脂复合材料力学性能的影响[J]. 材料工程, 2022, 50(4): 156-161.
[5]	姜萱, 陈林, 郝轩弘, 王悦怡, 张晓伟, 刘洪喜. 难熔高熵合金制备及性能研究进展[J]. 材料工程, 2022, 50(3): 33-42.
[6]	陈帅, 陶凤和, 贾长治, 孙河洋. 成形角度对选区激光熔化4Cr5MoSiV1钢组织和性能的影响[J]. 材料工程, 2022, 50(3): 122-130.
[7]	李红, 闫维嘉, 张禹, 杜文博, 栗卓新, MARIUSZBober, SENKARAJacek. 先进航空材料焊接过程热裂纹研究进展[J]. 材料工程, 2022, 50(2): 50-61.
[8]	唐鹏钧, 房立家, 王兴元, 李沛勇, 张学军. 人工时效对激光选区熔化AlMg_4.5Sc_0.55Mn_0.5Zr_0.2合金显微组织和力学性能的影响[J]. 材料工程, 2022, 50(2): 84-93.
[9]	金启豪, 陈娟, 彭立明, 李子言, 阎熙, 李春曦, 侯城成, 袁铭扬. 碳纤维增强树脂基复合材料与铝/镁合金连接研究进展[J]. 材料工程, 2022, 50(1): 15-24.
[10]	邵震, 崔雷, 王东坡, 陈永亮, 胡正根, 王非凡. 几何参数对2219铝合金拉拔式摩擦塞补焊接头微观组织及力学性能的影响[J]. 材料工程, 2022, 50(1): 25-32.
[11]	吴程浩, 刘涛, 高嵩, 石磊, 刘洪涛. 铝/钢异种金属的超声振动强化搅拌摩擦焊接工艺[J]. 材料工程, 2022, 50(1): 33-42.
[12]	徐学宏, 郑义珠, 陈吉平, 宁博, 刘晓忱. 缝合参数对泡沫夹层结构复合材料力学性能的影响[J]. 材料工程, 2022, 50(1): 132-137.
[13]	肖伟, 杨占旭, 乔庆东. 石墨电极表面聚丙烯腈纳米纤维膜的制备及性能[J]. 材料工程, 2021, 49(9): 60-68.
[14]	王庆娟, 吴金城, 王伟, 杜忠泽, 尹仁锟. 超高强β钛合金等温相转变特性及力学性能[J]. 材料工程, 2021, 49(9): 94-100.
[15]	孙昊飞, 肖志, 韦凯, 杨旭静, 齐军. 预弯曲变形对CP800复相钢力学性能的影响[J]. 材料工程, 2021, 49(8): 81-88.

Viewed

Full text

Abstract

Cited

Shared

Discussed