| Microstructure and mechanical properties of butt joints of QCr0.8/1Cr21Ni5Ti equal-thickness dissimilar materials by electron beam welding |
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| 作者姓名： | 张秉刚 吴林 冯吉才 李宏伟 杨卫鹏 |
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| 作者单位： | State Key Laboratory of Advanced Welding Production Technology，Harbin Institute of Technology，Harbin，150001，State Key Laboratory of Advanced Welding Production Technology，Harbin Institute of Technology，Harbin，150001，State Key Laboratory of Advanced Welding Production Technology，Harbin Institute of Technology，Harbin，150001，State Key Laboratory of Advanced Welding Production Technology，Harbin Institute of Technology，Harbin，150001，State Key Laboratory of Advanced Welding Production Technology，Harbin Institute of Technology，Harbin，150001 |
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| 摘 要： | 0 IntroductionThedissimilarmaterialsjointisusuallyemployedinindustrialproductiontomakefulluseofthematerialsperformanceadvantageorspecialstructuralpurpose.Thedissimilarmaterialsjoiningtechnologybetweencopperalloyandstainlesssteelhasattractedagreatdealofattention,botheffectiveassemblageputweldedcomponent’scoolingandhighstrengthintoeffect.However,becauseofbothmaterialschemicalandthermophysicalperformancedifferenceandcomplexityofweldingmetallurgy,thedefectsuchaspore,crackandbrittlephaseandarathe…
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Microstructure and mechanical properties of butt joints of QCr0.8/1Cr21Ni5Ti equal-thickness dissimilar materials by electron beam welding |
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| Zhang Binggang,Wu lin,Feng Jicai,Li Hongwei and Yang Weipeng,State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin,..Microstructure and mechanical properties of butt joints of QCr0.8/1Cr21Ni5Ti equal-thickness dissimilar materials by electron beam welding[J].China Welding,2004,13(2). |
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| Authors: | Zhang Binggang Wu lin Feng Jicai Li Hongwei and Yang Weipeng State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin |
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| Affiliation: | State Key Laboratory of Advanced Welding Production Technology,Harbin Institute of Technology,Harbin,150001 |
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| Abstract: | Butt joints of QCr0.8/1Cr21Ni5Ti equal-thickness dissimilar materials were obtained by electron beam welding with fixed accelerating welding velocity. Microstructure and composition of the EBW joint were investigated by means of optical micrography and EDX analysis, mechanical properties of the joint were also tested. The results show that joint's macrostructure was divided into three zones: top weld zone near QCr0.8 and bottom weld zone consisting of Cu(ss.Fe) with a certain amount of dispersedly distributed (α+ε) mixed microstructure, middle weld zone consisting of (α+ε) microstructure with a small amount of Cu(ss.Fe) particles. Morphological inhomogeneous macrostructure and uneven chemical compostion of QCr0.8/1Cr21Ni5Ti joint by EBW are the most important factor to result in decreasing joining strength. |
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| Keywords: | dissimilar materials electron beam welding microstructure mechanical properties |
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