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本文主要介绍了5083铝-镁合金的焊接的方法及采用脉冲MIG焊进行5083铝一镁合金焊接工艺试验研究的情况。介绍了焊接铝合金的主要规范参数和工艺控制要点,并对焊接过程中易出现的焊接缺陷进行了分析,提出了消除焊接缺陷的方法和措施。并针对MIG气体保护焊实际操作的特点,提出了教学培训中应注意的要点。 相似文献
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试验研究了淬火后的预变形量和时效工艺对6063薄壁管材力学性能的影响,确定该合金薄壁管材的最佳时效制度为200±5℃,保温8h.工业化生产出了符合要求的6063薄壁管材. 相似文献
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介绍有色金属特别是铜、铝、镁合金挤压加工材工业和技术发展现况。论述国内外挤压工艺装备及挤压机的发展概况,并详细分析了我国铜、铝、镁合金挤压工艺装备的现状及技术创新与研发新动向。 相似文献
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介绍了7050铝合金薄壁管材的规格和质量要求、工艺路线以及主要生产设备。在大量工艺试验基础上,研究探讨了7050铝合金薄壁管材的挤压工艺、热处理工艺及矫直方法。尺寸测量和力学性能结果表明,所加工7050铝合金薄壁管材完全满足用户要求。 相似文献
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变形镁合金在航空航天器中的应用 总被引:2,自引:0,他引:2
2005~2008年,欧盟在PF6框架内进行了一个名为“AEROMAG”的研究计划,有3个航空航天器制造企业、7个镁材生产企业、2个研究院、7所大学参与,对现行变形镁合金的加工性能、成形工艺、表面处理、燃烧性能、连接工艺与结构性能等作了精心的评价。结果是,没有一个镁合金的各项性能可全面与5083及2024-T3铝合金相抗衡,镁合金现在还役有取代航空铝合金的可能性。 相似文献
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复合轧制工艺对Al/Mg复合板冶金结合层组织和性能的影响 总被引:1,自引:0,他引:1
采用AZ31镁合金和纯铝进行高温复合轧制制备镁-铝复合板,使其兼具铝的表面耐蚀性和镁合金的高比强度特性.采用金相显微镜、扫描电子显微镜和电子万能拉伸机等设备,研究了不同热轧温度及退火工艺参数对铝-镁复合界面的显微组织和结合强度的影响.结果表明:300℃轧制,镁-铝复合板出现严重边裂;450℃轧制,边裂消失;在轧制温度为400℃、压下率为50%、300℃退火2 h的条件下得到的复合板界面结合强度最大,为7.5 MPa. 相似文献
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为节约能源,摸索出适宜的5083合金铸块均热加热制度,并对轧后表面质量和组织性能进行了对比,为5083合金现场生产提供合理的生产工艺参数。 相似文献
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基于"1+4"热连轧生产线、2800mm冷轧生产线,采用不同工艺线路制备了5083 H321铝合金板材,研究了不同制备工艺对板材组织性能的影响.结果表明,不同工艺路线成品板材力学性能、耐腐蚀性能及微观组织均存在明显差异.采用"1+4"热连轧生产线短流程工艺制备的5083 H321铝合金板材性能:抗拉强度358MPa、屈... 相似文献
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Vaira Vignesh Ramalingam Padmanaban Ramasamy 《Transactions of the Indian Institute of Metals》2017,70(10):2575-2589
Aluminium alloy 5083, widely used in marine applications, undergoes accelerated corrosion in sea water due to the aggressive reaction of chloride ions with the secondary phase particles and other intermetallics present in the alloy matrix. The corrosion rate of the alloy is also influenced by the temperature difference between the alloy and its environment. Friction stir processing (FSP) is a recent solid state processing technique for improving the surface properties of metals and alloys. In this study, an attempt has been made to explore the possibility of improving the corrosion resistance of AA5083 by FSP. FSP trials were performed by varying the tool rotation speed, tool traverse speed and shoulder diameter of the tool, as per face centered central composite design. The corrosion potential and the corrosion rate of friction stir processed AA5083 was studied using potentiodynamic polarization studies, at three different temperatures. Mathematical models based on polynomial—radial basis function were developed and used to study the effect of process parameters on the corrosion potential and the corrosion rate of friction stir processed AA5083. FSP resulted in refinement of the grain structure, dispersion and partial dissolution of secondary phase particles in the matrix, which increased the corrosion resistance of the alloy. 相似文献
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J. J. S. Dilip M. Koilraj V. Sundareswaran G. D. Janaki Ram S. R. Koteswara Rao 《Transactions of the Indian Institute of Metals》2010,63(4):757-764
Fusion welding of dissimilar aluminum alloys is very challenging. In the present work, Al-Cu alloy AA2219-T87 was friction
stir welded to Al-Mg alloy AA5083-H321. Weld microstructures, hardness, and tensile properties were evaluated in as-welded
condition. Microstructural studies revealed that the nugget region was primarily composed of alloy 2219, which was placed
on the advancing side. No significant mixing of the two base materials in the nugget region was observed. Hardness studies
revealed that the lowest hardness in the weldment occurred in the heat-affected zone on alloy 5083 side, where tensile failure
were observed to take place. Tensile tests indicated a joint efficiency of around 90%, which is substantially higher than
what can be achieved with conventional fusion welding. Overall, the results show that satisfactory butt welds can be produced
between AA2219-T87 and Al-Mg alloy AA5083-H321 sheets using friction stir welding. 相似文献
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分析了利用铜合金挤压材加工环状薄壁零件生产过程中产生变形、尺寸超差、磕碰的原因,并通过生产实验确定了合理的加工工艺路线,降低了生产成本,提高了产品质量. 相似文献
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采用传统的铸锭冶金法制备实验合金,利用拉伸试验、金相组织观察、SEM扫描以及TEM透射等实验方法,研究了稀土元素Er对5083合金微观组织及力学性能的影响。结果表明,稀土元素Er的加入,在结晶过程中形成了一种粗大化合物,这种粗大化合物对合金的力学性能不利。 相似文献