钢铜磁脉冲接头微观组织演化机理及数值模拟

doi:10.3901/JME.2023.13.364

机械工程学报 ›› 2023, Vol. 59 ›› Issue (13): 364-374.doi: 10.3901/JME.2023.13.364

• 制造工艺与装备 • 上一篇

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钢铜磁脉冲接头微观组织演化机理及数值模拟

牟刚¹, 何伦¹, 郑开魁¹, 沈忱², 向红亮¹, 马鑫磊³

1. 福州大学先进制造学院晋江 362251;
2. 上海交通大学材料科学与工程学院上海 200241;
3. 山东金特装备科技发展有限公司济南 250003

收稿日期:2022-08-18 修回日期:2023-01-24 出版日期:2023-07-05 发布日期:2023-08-15
通讯作者: 郑开魁(通信作者),男,1986年出生,博士,副教授,硕士研究生导师。主要研究方向为摩擦行为以及先进连接技术。E-mail:kuikui@fzu.edu.cn
作者简介:牟刚,男,1989年出生,讲师,硕士研究生导师。主要研究方向为异种金属连接。E-mail:MouGang@fzu.edu.cn
基金资助:
福建省自然科学基金(2021J05139)、福建省增材制造创新中心(ZCZZ211-12)、福州大学科研启动基金(510967)、福州大学贵重仪器设备开放测试基金(2022T033)和泉州市科技计划(2020C043R)资助项目。

Microstructure Evolution Mechanism and Numerical Simulation of Steel-copper Joint Fabricating by Electromagnetic Pulse Welding

MOU Gang¹, HE Lun¹, ZHENG Kaikui¹, SHEN Chen², XIANG Hongliang¹, MA Xinlei³

1. School of Advanced Manufacturing, Fuzhou University, Jinjiang 362251;
2. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200241;
3. Shandong Giant E-Tech Co., Ltd., Jinan 250003

Received:2022-08-18 Revised:2023-01-24 Online:2023-07-05 Published:2023-08-15

摘要/Abstract

摘要： 为揭示内外管径向间隙对电磁脉冲焊接头界面微观组织的内在作用机理，本文通过改变304L不锈钢与T2紫铜管的径向间隙，结合微观表征和数值模拟，深入研究微观组织演化机理。研究表明，试样界面呈现倾倒波浪状是高速碰撞引起的开尔文-亥姆霍兹界面失稳效应造成的。随着径向间隙由1.65 mm增加到2.15 mm，磁场强度峰值、碰撞速度及碰撞角度增加，界面微观组织的未结合区域增加，波浪状界面波长变大，且应力分布呈现S型。界面元素分布是局部区域高温熔化和较高温度下元素互扩散的综合作用引起的。接头形成过程包括外管上表面弧形化、外管端部的破碎化、未结合区域以及结合区域的形成四个阶段，其原因是在冲击波、反射波以及冲击波传播方向的综合叠加作用下，金属管不同部位发生了不同的塑性变形。

关键词: 磁脉冲焊接, 不锈钢, 铜, 波浪界面层, 微观组织

Abstract: To reveal the internal mechanism of the radial clearance between the inner and outer tubes on the microstructure of the electromagnetic pulse welding joint interface, the formation and evolution mechanism of interface microstructure are studied by changing the radial clearance between the 304L stainless steel and T2 copper tube combined with microscopic characterization and numerical simulation. The study shows that the interface presents a wave shape, which is due to the Kelvin-Helmholtz interfacial instability effect caused by the high-speed collision. As the radial clearance increases from 1.65 mm to 2.15 mm, magnetic intensity maximum, impact speed, impact angle, the length of the wavy unbonded region and the wavelength of the wavy interface increase. Meanwhile, the stress distribution appears S shape. The interface element distribution is a combination of local high-temperature melting and element interdiffusion at less high-temperature. And the formation of the steel-copper electromagnetic pulse welding joint includes the arcing of upper surface of the outer tube, the fragmentation of the end of the outer tube, the generation of unbonded areas and the generation of bonded areas. The reason is that the outer tube undergoes different plastic deformation under the combined effect of the propagation direction, the sound wave, and the reflected wave of the shock wave.

Key words: electromagnetic pulse welding, stainless steel, copper, wave-like interface, microstructure

中图分类号:

TG453

牟刚, 何伦, 郑开魁, 沈忱, 向红亮, 马鑫磊. 钢铜磁脉冲接头微观组织演化机理及数值模拟[J]. 机械工程学报, 2023, 59(13): 364-374.

MOU Gang, HE Lun, ZHENG Kaikui, SHEN Chen, XIANG Hongliang, MA Xinlei. Microstructure Evolution Mechanism and Numerical Simulation of Steel-copper Joint Fabricating by Electromagnetic Pulse Welding[J]. Journal of Mechanical Engineering, 2023, 59(13): 364-374.

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钢铜磁脉冲接头微观组织演化机理及数值模拟

Microstructure Evolution Mechanism and Numerical Simulation of Steel-copper Joint Fabricating by Electromagnetic Pulse Welding

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