切边铝板对角线偏差的控制

分析了1500横切机生产切边铝板时铝板对角线存在偏差的原因,提出了切边铝板对角线偏差控制途径,表明切边铝板对角线超差废品可控制在极小的范围.     

整车企业自制铝板零件的料片供货模式探讨

结合目前某公司铝板供货情况,分析了新车型自制零件用铝板材料的实际状况,创新性的提出了适应某公司新车型的,有针对性的改进方案和对策。方案的落实有效降低了铝板零件的原材料成本,减少仓储呆滞风险,减短材料运输环节,同时有利于对铝板料片质量的控制,为有效降低铝板自制零件的成本提供了可供借鉴的方案。     

连续铸轧法生产PS版铝板基材用坯料的工艺技术

介绍了生产PS版铝板基卷材的质量要求,利用铸轧法生产铝板基卷材用坯料的工艺技术及质量控制要点,提出了进一步提高PS版基质量的途径.     

铝板在车身覆盖件冲压生产中的关键技术

随着汽车轻量化的需求,铝合金材料被越来越多的应用到汽车制造领域。介绍了汽车行业常用2000系、5000系和6000系等铝合金材料,并简述了铝材料开发、在车身零件上的应用趋势,以及对于汽车轻量化的意义。从现场实际出发,通过对铝板材料的剪切、配送、存储、分张、冲压成形以及铝板零件的检修的各环节的现场分析,总结了四个方面的控制要点,即材料保存、板料拆垛、模具冲制、质检返修,并提出了预防材料发霉、解决铝板分张的措施、控制铝板成形质量以及铝板零件检验和返修要点等相应的解决方案。     

铝防盗盖表面流纹成因的研究

研究了铝防盗盖成型过程中铝板的应力,应变状态和金属流动特征,从理论上和铝板的组织状态方面分析了流纹的成因;同时从铝板表面粗糙度和表面缺陷方面分析了流纹的成因,提出了铝防盗表面流纹的控制方法。     

铝板热轧机的液压AGC控制

介绍了铝板热轧机液压AGC系统的控制原理,以及AGC的几种控制方式。     

6016汽车铝板包边性能及影响因素的实验研究

包边是汽车车身覆盖件内外板装配压合过程的重要工序,弯曲极限是评估铝板包边性能优劣的重要指标。针对9种不同性能和批次的进口6016汽车铝板,进行了180°三点弯曲试验,系统研究了材料力学性能、时效时间和预拉伸量对6016汽车铝板包边性能的影响规律,为现场质量和工艺控制提供了重要依据。研究结果表明,材料伸长率和硬化指数对6016汽车铝板的弯曲性能无明显影响,材料各向异性、时效时间和预拉伸量对6016汽车铝板的包边性能有明显影响。     

时效硬化对6021-T4铝板成形性影响及冲压工艺稳健设计

6021-T4铝板由于存在时效硬化现象,其材料参数随存放时间变动较大,造成铝板冲压成形不稳定;通过拉伸试验测得铝板规定使用期内(6个月)材料参数的变动范围,应用数值模拟分析时效硬化对其成形性能的影响;采用田口方法对冲压工艺进行稳健设计,将凸模圆角、凹模圆角和压边力等工艺参数作为控制因子,屈服强度、硬化指数、厚向异性系数等材料参数作为噪声因子,确定试验方案,以SN比为分析指标,找出控制因子的最优组合,完成铝板冲压工艺设计,削弱时效硬化对铝板成形性能的影响。     

采用退火隔层改善退火铝板的性能均匀性

采用退火隔层改善退火铝板的性能均匀性目前，仍有许多中小型铝加工厂的铝板生产方式是铁模铸造、块片轧制。Ｙ２和Ｍ状态铝板的机械性能主要靠成品退火来控制，大多数用箱式电阻炉。由于是块片生产和用箱式退火炉，在铝板成品退火时只能将退火铝板堆垛进炉退火。我厂生产...     

激光在铝板中激励Lamb波的多参量数值模拟

运用有限元方法,分析了激光参量和铝板参量对铝板中激光激励Lamb波的影响。通过建立轴对称的激光辐射模型,计算出不同激光能量下的瞬态温度场分布。研究结果表明,激光能量过高会使铝板表面损伤,应控制激光能量,使其低于材料损伤阈值。随后固定激光能量,改变铝板板厚和激光光斑半径的大小,发现光斑半径减小时,Lamb波激发率提高,频带变宽,所含的频谱成分更丰富。     

泡沫铝填充波纹夹芯板面外压缩的三维效应

研究了闭孔泡沫铝板、3种空心波纹铝板和3种用环氧树脂粘接而成的闭孔泡沫铝填充波纹铝板的平面外压缩性能.泡沫填充波纹铝板不仅能显著提高抗压强度和吸能能力,而且力学性能更加稳定.泡沫填充波纹板具有明显的三维压缩效果.铝合金板材强度越小,三维延伸变形越明显.由3种不同强度的铝合金板制成的泡沫铝填充波纹板具有相似的力学性能.成...     

预拉伸对7075铝合金厚板残余应力分布的影响

运用有限元法对7075铝合金厚板预拉伸过程进行了数值模拟,获得了预拉伸板内部的残余应力分布,研究了预拉伸量对残余应力演变的影响.采用裂纹柔度法对淬火板和预拉伸板(拉伸量分别为1.8%、2.2%和2.5%)进行了残余应力检测,计算得到了不同工艺下铝厚板内部的残余应力分布.结果表明:预拉伸能够大幅消减淬火残余应力,当拉伸量为2.2%左右时,残余应力减少至±20MPa,能够满足后续加工的要求.     

采用铸轧法生产3004铝合金深冲板坯

分析了铸轧法生产的3004铝合金的内部组织,解释了3004铝合金板在进行深冲时产生开裂的原因,通过不同试验方案,提出了提高3004铝合金板材的力学性能,达到很好的深冲效果的具体措施.     

Resistance monitoring of aluminum plates to microbiologically influenced corrosion using FFT impedance spectroscopy methods

It is well know that formation of a passive oxide film on aluminum can enhance its corrosion resistance. However, microbiologically species are able to damage this film. Microbial adhesion is widely accepted as important stage prior to the induction or initiation of biocorrosion. Pseudomonas aeruginosa and Cladosprioum sp. have been commonly associated with the microbiologically influenced corrosion (MIC) of aluminum and its alloys. In this study, the effect of an organic dye (Quinizarin), on the resistance of aluminum plates to MIC has been investigated by some corrosion monitoring methods such as FFT impedance spectroscopy, cyclic voltammetry and SEM (scanning electron microscopy). In this work, the surface of aluminum plates were changed after exposing them (five types: only polished, anodized, anodized and colored, anodized and colored and sealed) to Pseudomonas aeuroginosa in ASW (artificial sea water) as a microbial culture. The results showed that, the mentioned color caused a decrease in the growth of bacteria, because the color acts a protected layer on the surface of aluminum. This characteristic can reduce intensity of biocorrosion on aluminum plates, so the anodized and colored and sealed plates have the most resistance to MIC, and it can be shown and proven by these techniques which are mentioned above.     

固溶处理对7075/6009层状复合材料组织与性能的影响

通过分析7075/6009铝合金层状复合板材内层显微组织与显微硬度分布,研究了固溶处理对板材内层显微组织与力学性能的影响。结果表明:在470～500℃范围内,随着固溶温度的升高,板材内层和过渡区的显微硬度值呈先升后降的趋势,在485℃时达到峰值,而外层显微硬度值呈上升趋势;内层显微组织在485℃时残留的颗粒相数量最少,而在500℃时发生"过烧"。在15～300 min内,板材内层和过渡区显微硬度值在30 min时达到峰值,而外层显微硬度值变化不明显;内层显微组织随着固溶时间的延长而变粗大,残留颗粒相数量在30 min后趋于平衡。通过T6热处理工艺:485℃固溶30 min+水淬+175℃时效8 h,7075/6009铝合金层状复合板材可获得较高的力学性能:抗拉强度为404 MPa,屈服强度为364 MPa,伸长率为15.3%;同比T6热处理的6009铝合金板材,其抗拉强度提高36%,屈服强度提高75%,但伸长率降低16%。     

Aluminum alloy foam core sandwich panels fabricated from die casting aluminum alloy by friction stir welding route

An aluminum foam sandwiches (AFSs) consisting of ADC12 Al–Si–Cu die casting aluminum alloy foam and ADC6 Al–Mg die casting aluminum alloy face plates were fabricated. Using ADC12 die casting plates containing large amounts of gases as the starting material of the foam, ADC12 foam can be fabricated without using a blowing agent. Using FSW, both the uniform dispersion of the segregated gases and pore stabilization powder in the ADC12 die casting plates used to fabricate a foamable ADC12 precursor and the bonding of the ADC12 precursor to the ADC6 plates can be simultaneously achieved. Namely, the AFS precursor is expected to be obtained in fewer processing steps. From the visual observation of the fabricated AFSs, no deformation of the ADC6 plates occurred and the ADC6 plates on both sides of the aluminum foam remained parallel. From the X-ray CT observation of the fabricated AFSs, good pore structures without the infiltration of ADC12 foam into the ADC6 plates can be obtained at a holding temperature of 948 K and holding times of t = 10 and 11 min. In tensile tests on the fabricated AFSs, fracture occurred in the ADC12 foam parts but no fractures were observed at the bonding interface between the ADC12 foam and the ADC6 plates, that is, good bonding was obtained between the ADC12 foam and the ADC6 plates.     

新《变形铝及铝合金板、带缺陷》国家标准述评

介绍《变形铝及铝合金铸锭及加工制品缺陷第三部分:变形铝及铝合金板、带缺陷》国家标准的制定过程、原则和主要内容。提出了该标准实施过程中的几点建议。     

Influence of tool plunge depth and welding distance on friction stir lap welding of AA5454-O aluminum alloy plates with different thicknesses

AA5454-O aluminum alloy plates with thicknesses of 1.4 and 1.0 mm were friction-stir-lap-welded (FSLWed).The influences of the tool plunge depth and welding distance on surface appearance,macrostructure and mechanical properties of the FSLWed plates were experimentally investigated.The tensile shear load of the FSLWed plates was compared with that of the adhesive-bonded plates.Defect-free FSLWed zones were successfully obtained in all the tool plunge depths and the welding distances.The FSLWed zones exhibited the relatively smooth surface morphologies.Under all the FSLWed conditions,the FSLWed zone exhibited higher average hardness than the base metal.In addition,the upper plate exhibited a higher average hardness than the lower plate,although there was no special tendency in spite of the change in the tool plunge depth and the welding distance.The maximum tensile shear load of the FSLWed plates was much higher than that of the adhesive-bonded aluminum alloy plate.Especially,under the FSLW condition of the plunge depth of 1.8 mm and the welding distance of 40 mm,the tensile shear load of the FSLWed plate reached a level about 41% greater than that of the adhesive-bonded aluminum alloy plate.In addition,the maximum tensile shear load of the FSLWed plate was increased with the increase of the welding distance.     

Novel manufacturing process of closed-cell aluminum foam by accumulative roll-bonding

A new manufacturing process for closed-cell aluminum foams was developed using bulk aluminum sheets as a starting material. Aluminum preform containing titanium hydride powder was successfully produced through accumulative roll-bonding (ARB). Heating the preform sheets under the controlled temperature conditions, we obtained foamed aluminum plates of about 40% porosity.     

质子交换膜燃料电池用铝合金双极板研究

以铝合金为基体材料的双极板,用电脑雕刻方法制作流场,采用碱性-酸性双镀液体系化学镀镍磷合金镀层.研究了热处理对镍磷合金镀层的表面形貌和耐腐蚀性的影响.结果表明,铝合金双极板经过化学镀镍磷合金后,可以满足质子交换膜燃料电池的性能要求.