套娃式新型爆炸焊接法及试样焊接质量分析  

Micro-structure and mechanical properties of explosively welded steel/Cu pipes and Al/Cu pipe/rod via the Russiandolls-like experimental arrangement

作　　者：张龄匀 马宏昊[2] 沈兆武[2] 周国安 ZHANG Lingyun;MA Honghao;SHEN Zhaowu;ZHOU Guoan(The Hong Kong University of Science and Technology,Hong Kong,999077,China;CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China,Hefei,230027,China)

机构地区：[1]香港科技大学,中国香港999077 [2]中国科学技术大学,中国科学院材料力学行为和设计重点试验室,合肥230027

出　　处：《焊接学报》2021年第5期1-6,I0001,共7页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(11532010,11972263)。

摘　　要：采用套娃式新型爆炸焊接法一次试验高效制备出以Q235钢为基管、T2紫铜为覆管的Q235/T2复合管及以1060工业纯铝为覆管、T2紫铜为基棒的1060/T2复合棒各一件.对试样结合界面的微观形貌及轴向压缩行为进行了测试与分析.结果表明,受传爆装置产生的射流影响,1060/T2爆炸焊接棒顶端有一直径约3 mm的球形凹槽,距顶部约有8.5 mm区域焊接质量较差,其余部位焊接质量良好;Q235/1060爆炸焊接管未受此影响.沿着爆轰波传播方向,Q235/T2复合管及1060/T2复合棒的结合界面均逐渐从不稳定波形结合过渡到规则的、幅值/宽度分别约为65μm/210μm、120μm/400μm的波形结合.EDS显示Q235/T2复合管结合界面处铁铜原子扩散比在44∶56~72∶28之间,1060/T2复合棒结合界面处有AlCu,Al_(2)Cu生成;力学性能方面,轴向准静态压缩条件下,Q235/T2复合管、1060/T2复合棒的屈服应力/屈服应变分别约为598 MPa/5.8%和340 MPa/4.8%.The steel-Q235/copper-T2 pipes and aluminum-1060/copper-T2 composite pipe/rod are fabricated by an unique manufacturing process which we call it“the Russian-dolls-like experimental arrangement”.After the experiment,samples’welding quality along the detonation direction is firstly evaluated by an optical microscope and a scanning electron microscope equipped with a backscattered electrons detector.Mechanical properties of welded samples are checked via longitudinal compression tests.Results show that due to the jet produced by part no.6,there is aϕ3.0 mm spherical groove on top of the Al/Cu explosively-welded rod.Because of this,the section 8.5 mm from the top(Al/Cu couple)is not welded,while the Steel/Cu couple is not affected.Bonding interfaces of Steel/Cu and Steel/Cu couples both change from unstable ones to regular/wavy ones along the detonation direction.Atomic ratios of steel and copper around the Steel/Cu interface varies from 44∶56 to 72∶28,and AlCu and Al_(2)Cu are identified around the Al/Cu interface via EDS analysis.Samples’yield strength/strain in longitudinal compression for steel/Cu and Al/Cu couples are 598 MPa/5.8%and 340 MPa/4.8%,respectively.

关 键 词：爆炸焊接 铜钢合金 铜铝合金 显微结构 力学性能 

分 类 号：TG456.6[金属学及工艺—焊接]