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铝合金激光焊接工艺特性研究 总被引:3,自引:0,他引:3
结合近年铝合金激光焊接的研究情况,阐述了铝合金激光焊接与复合焊接的特点以及研究现状,分析了铝合金的焊接特性以及焊接工艺参数对焊接质量的影响,讨论了激光焊接时存在的问题和解决措施。 相似文献
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激光-电弧复合焊接综合了激光焊和电弧焊的优势,该技术对于铝合金结构件的连接具有很大的应用潜力,受到了越来越广泛的重视,是激光焊接领域重点研究方向之一.文中详细综述和分析了激光与不同种类电弧复合焊接铝合金的工艺特征,着重阐明了激光-电弧复合焊接机理的研究现状,同时指出相关研究存在的问题和进一步的研究方向,介绍了铝合金激光-电弧复合焊接在工业中的应用,并对激光-电弧复合焊接的应用前景进行了展望. 相似文献
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铁道车辆用铝材的焊接特性 总被引:7,自引:1,他引:7
对高速列车用6063、6061、919(相当于7005)铝合金母材及与之相匹配的焊丝(4043、5183、5356铝合金丝)施以MIG焊接之后的焊区强度、硬度以及焊接接头的腐蚀倾向、残余应力水平和常见的焊接裂纹与气孔等缺陷进行了分析和研究。结果表明,由于产生了软化,焊缝及热影响区的强度和硬度均低于母材;从综合效果来看,以母材6061合金匹配4043焊丝为佳;从焊后强度和刚度看,中空型材的截面以斜筋截面为优;从焊接接头的可靠性看,以纵向MIG自动焊接对接为最好 相似文献
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Q. F. Wang J. H. Liu Z. Y. Li P. H. Li G. F. Zhou X. Chen Huazhong University of Sci. & Tech. Wuhan China ) Technology Center of WISCO Wuhan China) 《金属学报(英文版)》2000,13(1):151-156
1.IntroductionbeerbeamweldingilasbeenwidelyusedasanimportantprocessinsheetsteelstrUcture.WiththedevelOPmentofhighpowerlaseranditsincreasingsuccessfalaPPlicationsinindustry,itisbecomingObViousthatthatlaserweldingwillalsohaveanimportantimpactonthemediumandheaVysectionindusalintheneaxfutUre.Theleadingindustryforinboducinghighpowerlaserweldingistheshipbuilding['j.ULCBanisalatelydevelopedsteelinWuhanSteelwithultra--lowcarboncontentanddondnativendcrostructureOfbainite,whichwillbewidelyusedinsh… 相似文献
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压铸镁合金激光焊气孔形成原因的实验研究 总被引:3,自引:0,他引:3
压铸镁合金因含气量高而使得激光焊接气孔问题非常突出,为实现压铸镁合金的低气孔率焊接技术,通过对母材固态加热前后气孔特征参数、密度变化的分析以及焊前除氢后施焊与不除氢施焊气孔倾向的比较,研究了压铸镁合金中气体来源的特点及气孔形成过程.结果表明,母材中同时含有分子氢和原子氢,以高压气孔形式存在的分子氢以及以过饱和固溶形式存在的原子氢均是导致压铸镁合金激光焊产生大量气孔的原因.而向焊缝中引入Zr元素可以显著降低气孔倾向,但Zr的作用机理还有待于深入研究. 相似文献
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H.Y. Wang Z.J. Li 《金属学报(英文版)》2006,19(4):287-294
Laser welling process of AZ61 magnesium alloys is investigated using a special CO2 laser experimental system. The effect of processing parameters including laser power, welling speed, and protection gas flow at the top and bottom is researched. The results show that an ideal well bead can be formed by choosing the processing parameters properly. An optimized parameter range is obtained by a large number of experiments. Among them, laser power and welling speed are the two main parameters that determine the well width and dimensions. The protect gas flow rate has a slight effect on the well width, but it directly effects the surface color of the well. The test results for typical welds indicate that the microhardness and tensile strength of the well zone are better than that of the base metal A fine-grained well region has been observed and no obvious heat-affected zone is found. The well zone mainly consists of small α-Mg phase, (α + Al12Mg17), and other eutectic phases. The small grains and the eutectic phases in the joint are believed to play an important role in the increase of the strength of wells for AZ61 magnesium alloys. 相似文献
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