首页|不同搭接形式下铜/钢电磁脉冲焊接界面分析

不同搭接形式下铜/钢电磁脉冲焊接界面分析

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由于铜/钢的物化参数相差较大,熔钎焊时存在接头脆性﹑应力集中等问题,本研究借助新型电磁脉冲焊接技术,通过设计锥度或台阶形式的搭接方法,获得了铜/钢焊接接头,并借助界面微观SEM﹑EDS观察及显微硬度测试,分析不同搭接形式下的接头连接特征.结果表明:直接搭接时界面波形较差,有少量孔隙;台阶搭接时界面波形较大,但是,波形界面存在前后漩涡,且有"熔合区";锥度搭接时界面为近似均波连接特征.当采用锥度结构设计时,波状界面的扩散区宽度为5 μm,两种材料结合相对紧密.界面塑性变形﹑元素扩散程度决定界面硬度分布,采用锥度搭接设计时金属粒子流能够飞出界面,产生的塑性变形相对较小,其硬度过渡平缓,有利于冶金结合.
Analysis of Copper/Steel Electromagnetic Pulse Welding Interface under Different Lap Forms
Due to large difference in physical and chemical parameters of copper/steel,there are problems of brittleness and stress concentration of joint during fusion brazing.In this study,the copper/steel welded joints were obtained by using new electromagnetic pulse welding technology with designed taper or step lap forms.By using the interface microscopic SEM,EDS observation and microhardness test,the connection characteristics of joints with different lap forms were analyzed.The results show that when the direct lap form is used,it has poor waveform and a few pores.When the step lap form is used,the interface waveform is large,but there are front and back vortices and"fusion zone"at the interface.The interface prepared by using taper lap form is an approximate homogeneous wave connection.When the designed taper structure is used,the width of diffusion zone of the wavy interface is 5 μm,and the two materials are closely bonded.The plastic deformation of the interface and the degree of element diffusion determine the hardness distribution of the interface.In the taper lap form,the metal particle flow can effectively fly out of the interface,the produced plastic deformation is relatively small,and the hardness transition is gentle,which is conductive to metallurgical bonding.

copper/steelelectromagnetic pulse weldinglap formwaveform interface

韩佳良、迟露鑫、冉洋、黄岩、张玉虎、郑旭明、梁仕发

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重庆理工大学 材料科学与工程学院, 重庆 400050

省部共建有色金属先进加工与再利用国家重点实验室 (兰州理工大学),甘肃 兰州 730050

重庆普尔萨科技有限公司, 重庆 400054

铜/钢 电磁脉冲焊接 搭接形式 波形界面

国家自然科学基金青年基金重庆市自然科学基金面上项目兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室开放基金重庆理工大学研究生教育高质量发展项目重庆普通本科高等学校"五座城"大学生创新创业训练计划

51805065cstc2020jcyjmsxmX0574SKLAB02019002gzlcx202230152021128

2024

10.14158/j.cnki.1001-3814.20223158

热加工工艺
中国船舶重工集团公司热加工工艺研究所 中国造船工程学会船舶材料学术委员会

热加工工艺

CSTPCD北大核心
影响因子：0.55
ISSN：1001-3814
年,卷(期)：2024.53(5)
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