首页 > 论文 > 中国激光 > 47卷 > 9期(pp:902004--1)

焊面织构化对铜/钢激光焊接接头组织及力学性能的影响

Effect of Surface Texturization on Microstructure and Mechanical Properties of Laser Welded Copper/Steel Joint

  • 摘要
  • 论文信息
  • 参考文献
  • 被引情况
  • PDF全文
分享:

摘要

为提高铜/钢转换接头搭接焊的强度与冶金相容性,提出了异种金属微织构激光焊接法。首先利用超快绿激光在钢基体表面制备微织构,以提高焊接时钢侧界面的浸润性与咬合强度,然后利用脉冲绿激光在微织构表面进行铜/钢熔化搭接焊,最后研究了微织构的形貌、接头组织、结合界面及拉伸性能与断裂机制。结果表明:在较高的激光功率与刻蚀次数下,热烧蚀程度加重,易导致凹槽内部质量恶化;表面织构化对接头组织与抗拉强度具有显著影响,表面织构化可以强化对流传质,增强铜向熔池底部(钢侧)的扩散,有利于形成含铜量更高的α-Fe、γ-Fe固溶体,使得熔池底部的显微硬度更高;当凹槽深度为89.91 μm时,织构化接头的抗拉强度最高,为112.5 MPa,相比未织构化接头提高了19.5%;接头的断裂机制为韧性断裂;接头拉伸性能的提高得益于固溶强化、熔合体积的增大以及涡旋咬合作用。

Abstract

To improve the overlap welding strength and metallurgical compatibility of copper/steel transition joints, a dissimilar metal microtexture-melting laser overlap welding method was proposed. First, ultrafast green laser was used to prepare microtextures on the surface of the steel substrate to improve the wettability and occlusion strength of the steel side interface during the overlap welding, and then copper/steel fusion overlap welding was performed on different microtextured surfaces by pulsed green laser. The microtexture morphology, joint microstructure, bonding interface, tensile properties and fracture mechanisms were studied. The results show that the higher laser power and etching times, the greater the degree of thermal ablation, which easily leads to the deterioration of the internal quality of the groove. The surface texturization has a significant effect on the joint microstructure and tensile strength, and surface texturization can strengthen convective mass transfer, enhance the diffusion of copper to the bottom of the molten pool (steel side), and help the formation of α-Fe and γ-Fe solid solutions with higher copper content, which makes the microhardness of the bottom of the molten pool higher. When the groove depth is 89.91 μm, the tensile strength of the textured joint is the largest, which is 112.5 MPa, 19.5% higher than that of the untextured joint. The fracture mechanism of joints is ductile fracture. The improvement of tensile properties is due to solid solution strengthening, the increase of fusion volume and the vortex bite.

广告组1 - 空间光调制器+DMD
补充资料

中图分类号:TG456.7

DOI:10.3788/CJL202047.0902004

所属栏目:激光制造

基金项目:浙江省自然科学基金、浙江省一般科研项目、温州市科技计划项目;

收稿日期:2020-03-24

修改稿日期:2020-05-26

网络出版日期:2020-09-01

作者单位    点击查看

尚大智:温州大学机电工程学院, 浙江 温州 325035浙江省激光加工机器人重点实验室, 浙江 温州 325035
张健:温州大学机电工程学院, 浙江 温州 325035浙江省激光加工机器人重点实验室, 浙江 温州 325035浙江长城换向器有限公司, 浙江 温州 325200
冯爱新:温州大学机电工程学院, 浙江 温州 325035浙江省激光加工机器人重点实验室, 浙江 温州 325035
周远航:温州大学机电工程学院, 浙江 温州 325035浙江省激光加工机器人重点实验室, 浙江 温州 325035
唐杰:温州大学机电工程学院, 浙江 温州 325035浙江省激光加工机器人重点实验室, 浙江 温州 325035
陈凤仙:浙江长城换向器有限公司, 浙江 温州 325200

联系人作者:张健(zhangjian200623@sina.com)

备注:浙江省自然科学基金、浙江省一般科研项目、温州市科技计划项目;

【1】Zhen G Y, Shang F G. Electrical grounding technique[M]. Beijing: China Electric Power Press, 2013, 22-28.
甄国涌, 商福恭. 电气接地技术[M]. 北京: 中国电力出版社, 2013, 22-28.

【2】Zhang L J, Ning J, Zhang X J, et al. Single pass hybrid laser-MIG welding of 4-mm thick copper without preheating [J]. Materials & Design. 2015, 74: 1-18.

【3】Shi Y, Gao H M, Li G, et al. High frequency induction brazing process of copper-steel and its effects on microstructure and electrical conductivity of weld joint [J]. Materials Review. 2018, 32(6): 909-914.
石玗, 高海铭, 李广, 等. 铜-钢高频感应钎焊工艺及其对接头组织和导电性的影响 [J]. 材料导报. 2018, 32(6): 909-914.

【4】Zhao H B. Discussion on welding technology of copper and steel with different materials China Metal Bulletin[J]. 0, 2018(4): 75-77.
赵海波. 铜与钢的异种材料焊接技术的实践探讨 中国金属通报[J]. 0, 2018(4): 75-77.

【5】Shi J. Fusion welding on copper-steel dissimilar materials and joint microstructure evolution Xi''''an: Xi''''an University of [D]. Technology. 2019, 10-17.
史杰. 铜-钢异种材料焊接工艺及组织演变行为研究 [D]. 西安: 西安理工大学. 2019, 10-17.

【6】Meco S, Ganguly S, Williams S, et al. Effect of laser processing parameters on the formation of intermetallic compounds in Fe-Al dissimilar welding [J]. Journal of Materials Engineering and Performance. 2014, 23(9): 3361-3370.

【7】Pi Y D, Dong P, Yang W X, et al. Laser penetration brazing of brass and low carbon steel [J]. Chinese Journal of Lasers. 2007, 34(11): 1562-1566.
皮友东, 董鹏, 杨武雄, 等. 黄铜-低碳钢异种金属激光深熔钎焊 [J]. 中国激光. 2007, 34(11): 1562-1566.

【8】Chen S H, Huang J H, Xia J, et al. Influence of processing parameters on the characteristics of stainless steel/copper laser welding [J]. Journal of Materials Processing Technology. 2015, 222: 43-51.

【9】Zhang J, Zhang J C, Zhang Q M, et al. Experimental study and design of dual-wavelength coaxial hybrid laser welding system [J]. Chinese Journal of Lasers. 2017, 44(6): 0602007.
张健, 张津超, 张庆茂, 等. 双波长激光束同轴复合焊接系统设计与实验研究 [J]. 中国激光. 2017, 44(6): 0602007.

【10】Fu Y H, Liu Q X, Ye Y X, et al. Research on laser surface micro texturing processing of single pulse intervals [J]. Chinese Journal of Lasers. 2015, 42(12): 1203005.
符永宏, 刘强宪, 叶云霞, 等. 同点间隔多次激光微织构工艺研究 [J]. 中国激光. 2015, 42(12): 1203005.

【11】Zhang W Z. Research on laser welding 304 austenitic stainless steel sheet [D]. Dalian: Dalian University of Technology. 2009, 15-16.
张维哲. 304不锈钢薄板激光焊接技术研究 [D]. 大连: 大连理工大学. 2009, 15-16.

【12】Zhou J Z, Zhong H, Huang S, et al. Surface micro-dimple effect and electrochemical corrosion behaviors of AZ31B magnesium alloy treated by laser [J]. Chinese Journal of Lasers. 2015, 42(3): 0303007.
周建忠, 钟辉, 黄舒, 等. AZ31B镁合金激光表面微凹坑效应及其电化学腐蚀行为 [J]. 中国激光. 2015, 42(3): 0303007.

【13】Fasasi A Y, Mwenifumbo S, Rahbar N, et al. Nano-second UV laser processed micro-grooves on Ti6Al4V for biomedical applications [J]. Materials Science and Engineering C. 2009, 29(1): 5-13.

【14】Zhang J, Lin S J, Su S X, et al. Effect of defocusing amount on weld shaping in fiber laser welding of aluminum alloy [J]. Laser & Optoelectronics Progress. 2016, 53(12): 121405.
张健, 林仕君, 苏绍兴, 等. 光纤激光焊接铝合金离焦量对焊缝成形的影响 [J]. 激光与光电子学进展. 2016, 53(12): 121405.

【15】Shu L S, Wang J S. Effect of defocusing distance on microstructure and properties of laser welded joint of 1Cr17Ni2 stainless steel plate [J]. Laser & Optoelectronics Progress. 2020, 57(1): 011401.
舒林森, 王家胜. 离焦量对1Cr17Ni2薄钢板激光焊接接头组织与性能的影响 [J]. 激光与光电子学进展. 2020, 57(1): 011401.

【16】Cheng D H, Shao J H, Chen Y P, et al. Plasma arc welding of copper-steel dissimilar metals [J]. Transactions of the China Welding Institution. 2012, 33(9): 97-100.
程东海, 邵景辉, 陈益平, 等. 铜钢异种材料等离子弧焊接头性能 [J]. 焊接学报. 2012, 33(9): 97-100.

【17】Xu S, Yang L J, Xu S F, et al. Relation between plasma electrical signal oscillation and weld depth in laser deep penetration welding [J]. Chinese Journal of Lasers. 2020, 47(1): 0102006.
许赛, 杨立军, 徐书峰, 等. 激光深熔焊等离子体电信号振荡特征与焊缝熔深的特征关系 [J]. 中国激光. 2020, 47(1): 0102006.

【18】Wang T G, Tang X H, Han X X, et al. Factors influencing weld formation for laser welding of 5083 aluminum alloy in vacuum [J]. Chinese Journal of Lasers. 2018, 45(11): 1102001.
王天鸽, 唐新华, 韩潇潇, 等. 5083铝合金真空激光焊缝成形的影响因素 [J]. 中国激光. 2018, 45(11): 1102001.

【19】Peng C, Cheng D H, Chen Y P, et al. Microstructure of dissimilar material joint with T2 copper and steel 304 for plasma arc welding [J]. Materials Science and Technology. 2015, 23(4): 105-110.
彭迟, 程东海, 陈益平, 等. 铜/钢异种材料等离子弧焊接头显微组织分析 [J]. 材料科学与工艺. 2015, 23(4): 105-110.

引用该论文

Shang Dazhi,Zhang Jian,Feng Aixin,Zhou Yuanhang,Tang Jie,Chen Fengxian. Effect of Surface Texturization on Microstructure and Mechanical Properties of Laser Welded Copper/Steel Joint[J]. Chinese Journal of Lasers, 2020, 47(9): 0902004

尚大智,张健,冯爱新,周远航,唐杰,陈凤仙. 焊面织构化对铜/钢激光焊接接头组织及力学性能的影响[J]. 中国激光, 2020, 47(9): 0902004

您的浏览器不支持PDF插件,请使用最新的(Chrome/Fire Fox等)浏览器.或者您还可以点击此处下载该论文PDF