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诺威力复合锭铸造法的原理和工艺及应用 总被引:2,自引:0,他引:2
采用DC法商业化铸造复合铝合金锭是铝业界工程师几十年来追求的目标之一,2005年底美国诺威力公司奥斯威戈轧制厂在瓦格斯塔夫公司专家的协助下,终于成功地实现了复合锭的工业化规模铸造,到2006年3月份已成功地铸出50多种不同合金的复合锭。用此种锭轧制的1200/2124合金薄板及4147/3003合金钎焊带箔已发往用户。奥斯威戈轧制厂已形成70kt/a复合锭的生产能力,诺威力公司将在韩国蔚山轧制厂与瑞士谢尔轧制厂各建一条铸造复合锭的生产线。复合锭的商业化生产将大大扩大复合铝板带箔的应用范围,在DC法发展历程中具有里程碑意义。 相似文献
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以4A60铝合金和08Al低碳钢为研究对象,利用异径轧机进行异径同速轧制,从厚度变化、硬度分布及金相组织等几个方面对薄铝复层的铝/钢轧制复合变形区的金属流动规律进行了研究分析。结果表明:铝钢轧制复合过程中铝先于钢达到稳定塑性变形,轧制复合过程中变形区可分为铝钢变形未复合区、铝钢变形复合区和钢变形区。当变形量增加到55%时,钢的硬度从约110 HV升高到210 HV,而铝层的硬度变化不大,基本保持在(40±5) HV。4A60铝和08Al钢的临界复合压下量为15%左右,当压下量超过45%时,仅发生钢的变形,而铝的厚度基本保持不变。铝层厚度与总厚度的比值(复合比)由轧前的0.054降低到轧后的0.052,说明轧制复合过程中铝的变形更大。 相似文献
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文章通过有限元速度场研究了冷轧铜铝双层板的复合过程,将该过程中金属的变形特征进行了分析,同时,将有限元计算结果与某工厂数据相结合,分析了轧制速度、压下率、异径同步、异径异步对铜铝双层板复合的影响。研究表明,速度场模型能够更有效地说明铜铝板的复合过程;轧制速度越大,变形区出口处复合面金属流动的同步性越差,复合强度越低;压下率越大, 变形区出口处复合面金属流动的同步性越强,复合强度越高;异径同步轧制铜铝复合板时,辊径比取1.4~1.6,变形区出口处复合面金属流动的同步性越较好,复合强度较高;异径异步轧制铜铝复合板时,轧制速比取1.2,变形区出口处复合面金属流动的同步性越较好,复合强度较高。 相似文献
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《稀有金属材料与工程》2017,(7)
通过有限(FEM)元速度场研究了冷轧铜铝双层板的复合过程,将该过程中金属的变形特征进行了分析,同时,将有限元计算结果与某工厂数据相结合,分析了轧制速度、压下率、异径同步、异径异步对铜铝双层板复合的影响。结果表明,速度场模型能够更有效地说明铜铝板的复合过程;轧制速度越大,变形区出口处复合面金属流动的同步性越差,复合强度越低;异径同步轧制铜铝复合板时,辊径比取1.4~1.6,变形区出口处复合面金属流动的同步性越好,复合强度较高;异径异步轧制铜铝复合板时,轧制速比取1.2,变形区出口处复合面金属流动的同步性越好,复合强度较高。 相似文献
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为提高热烧结锌铝涂层(简称锌铝涂层)的耐蚀性,在涂层表面涂覆一层环氧富铝膜,形成复合涂层。采用十字划格法测试锌铝涂层和复合涂层的附着强度,并用扫描电镜(SEM)分析涂层微观形貌;用海水全浸实验和中性盐雾实验评价涂层的耐蚀性能;采用动电位极化曲线和电化学阻抗谱(EIS)研究涂层的电化学性能。结果表明,复合涂层表面更为完整致密,防水性能优于锌铝涂层;环氧富铝膜层能够有效的阻挡腐蚀介质的入侵,复合涂层耐蚀性比锌铝涂层高。复合涂层腐蚀初期主要为扩散控制,随着腐蚀介质的不断渗入,环氧膜层中的Al粉发生活化反应,起到了一定的牺牲阳极保护作用。有机覆膜提高了锌铝涂层在海洋环境中的适用能力。 相似文献
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Takuto Yamaguchi Tomotake Tohei Osamu Ikeda Shohei Hata Yuichi Oda Kazuma Kuroki 《Welding International》2017,31(11):846-856
Al-rich Zn/Al/Zn clad solder were developed as Pb-free solder for a die-attachment. The Zn/Al/Zn clad solder was produced by clad rolling of Zn and Al strips in order to prevent Al from oxidation and improve wettability. The Zn/Al/Zn clad solder was melted at 382°C after solid-state interdiffusion of the Zn and Al layers. Bonding was successfully achieved with bonding pressure of a few kilopascals. Thermal cycle life of Invar-to-Cu substrate joint using the Zn/Al/Zn clad solder was longer than that of Pb-Sn-Ag solder. No Kirkendall voids were observed in the vicinity of the bonded interface after ageing at 250 °C for 1000 h. 相似文献
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1 INTRODUCTIONSteel/Al 2 0Snbondingplateisidealmaterialforneotypebearing[1] .Itiswidelyusedinthefieldssuchasmachinery ,automobile ,etc[2 5] .Forthisbondingplate ,twothingsareveryimportant.Oneisthedis tributionofSnparticlesinAl 2 0Snlayer ,theotheristheinterfacialshearstrength .Theformerdeterminesthelifeofbonding plate .Thelatterdeterminesthesafetyofbondingplate .TheevenerthedistributionofSnparticlesinAl 2 0Snlayer ,thelongertheusagelifeofbondingplate .Thelargertheinterfacialshearstr… 相似文献
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本工作通过抗剪切强度测试、剪切断面显微观察和有限元仿真等手段对不同Cu/Al层厚比下波纹辊轧制(CRB)Cu/Al复合板的金属的变形行为和界面结合性能进行了研究。结果发现,CRB过程中界面处形成了局部强正应力和多个“搓轧区”,促进了复合板的塑性变形和界面结合。增大Cu/Al层厚比可提升Cu层的变形率和波谷界面处的正应力,有利于降低Cu/Al复合板的翘曲程度,并增强界面的整体结合性能。当层厚比从2:10增加到2:4时,界面抗剪切强度从40.39MPa上升到47.24 MPa,但界面抗剪切强度的波动逐渐增大。 相似文献
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Juan Liu Yuze Wu Lin Wang Hui Wang Charlie Kong Alexander Pesin Alexander P. Zhilyaev Hailiang Yu 《金属学报(英文版)》2020,33(6):871-880
Sandwich-like Al/Ti/Al-laminated composites have many advantages such as low density and high specific strength with value in mechanical manufacturing and aerospace engineering. Here, Al/Ti/Al-laminated composites were fabricated by hot roll bonding and subsequent processes: cryorolling(-190 ℃ and-100 ℃), cold rolling(25 ℃), and hot rolling(300 ℃). Their bonding strength and mechanical properties were then studied by an Autograph AGS-X universal electronic testing machine. The results show that cryorolling can improve the interface bonding strength and tensile strength of Al/Ti/Allaminated composites. For the Al/Ti/Al-laminated composites subjected to cryorolling at-100 ℃, they have the highest strength near 260 MPa—this is 48 MPa and 41 MPa higher than the laminated composites subjected to cold and hot rolling, respectively. These results also show the strongest peeling strength. Finally, the mechanisms of the enhancement of bonding strength and mechanical properties of Al/Ti/Al-laminated composites subjected to cryorolling were mainly discussed. 相似文献
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H. Saleh M. Schmidtchen R. Kawalla 《Journal of Materials Engineering and Performance》2018,27(10):5069-5078
In an experiment in which twin-roll cast AZ31 magnesium alloy and commercial purity aluminum (AA 1050) sheets were bonded by hot rolling as Al/Mg/Al laminate composites, it was found that increasing the preheating temperatures up to 400 °C enhances the bonding strength of composites. Further increases in the preheating temperatures accelerate the magnesium oxide growth and thus reduce the bonding strength. The influence of the reduction ratio on the bonding properties was also studied, whereby it was observed that increasing the rolling reduction led to an increase in the bonding strength. The experimental results show that the optimum bonding strength can be obtained at rolling temperatures of 375-400 °C with a 50-60% reduction in thickness. On the other hand, the subsequent deformation behavior of composite was assessed using plane strain compression and deep drawing tests. We demonstrate that the composites produced using the optimum roll bonding conditions exhibited sufficient bonding during subsequent deformation and did not reveal any debonding at the bonding interface. 相似文献
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轧制参数对钛/铝轧制复合板的结合强度和剥离面SEM形貌的影响 总被引:16,自引:0,他引:16
研究了钛/铝的轧制复合工艺对轧后结合强度和剥离面形貌的影响。试验结果表明,钛的变形程度是控制结合强度和剥离面形貌的主要因素;轧制时铝的温度对结合也有重要的影响。在钛和铝的热轧复合中并存着3种结合机制。 相似文献
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《中国有色金属学会会刊》2022,32(4):1144-1158
To achieve Ti/Mg bimetallic composite with high strength and metallurgical bonding interface, Al interlayer and Zn/Al composite interlayer were used to prepare TC4/AZ91D bimetal composite with metallurgical bonding interface by solid–liquid compound casting, respectively. Al interlayer was prepared on the surface of TC4 alloy by hot dipping, and Zn/Al composite interlayer was prepared by electroplating process. The results suggested that the phases across the interface were AlTi and α(Al) + Mg21(Al, Zn)17 when Zn/Al composite interlayer was used. When Al interlayer was used as interlayer, AlMgTi ternary structure and Al12Mg17 + δ-Mg eutectic structure were the main phases at the interface. The shear strength of TC4/AZ91D bimetal with Zn/Al composite interlayer was much higher than that with pure Al interlayer, and the value of the shear strength was increased from 48.5 to 67.4 MPa. Thermodynamic models based on different compositions of the interface were established to explain the microstructure evolution of the interfacial zone. 相似文献
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通过室温冷轧制备出了1060Al/AlSn20Cu/1060Al/钢多层复合板材,并探索了轧制压下量对复合板微观组织和力学性能的影响。利用扫描电子显微镜和电子背散射衍射(EBSD)对复合板微观组织进行表征,通过拉伸试验测量了复合板力学性能。复合板的初始轧制压下量为17%,最小稳定压下量为40%。结果表明,随着轧制压下量的增加,铝合金层中锡相和钢中组织沿轧制方向被拉长,但是纯铝层呈现出等轴晶。随着轧制压下量的增大,复合板抗拉伸强度和界面结合强度增加,而延伸率下降。AlSn20Cu合金层的断裂主要跟其中的锡相有关。 相似文献
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Jonghyun Kim 《Science & Technology of Welding & Joining》2017,22(8):714-718
This study joined a novel Cu-based bulk metallic glass (BMG) to carbon steel using a brazing process. Cu54Ni6Zr22Ti18 BMG was brazed to SS400 carbon steel using filler metal at 713?K under a compressive stress of 15?MPa for 3?min. Considering the relatively low glass-forming ability, pure Zn and Zn–Ag–Al filler metals were selected to suppress the crystallisation during a reheating thermal cycle. A sound bonding interface without notable chemical diffusion was obtained using the suggested brazing method, particularly with the Zn–Ag–Al filler. This gave rise to considerable improvement in shear bonding strength, from 9 to 45?MPa, when replacing the Zn filler with the Zn–Ag–Al filler. The present method also induced no marked change in phase composition of the BMG due to the low bonding temperature and short bonding time. Slight variations in glass transition temperature and crystallisation temperature would result from a thermal annealing effect. 相似文献
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Chen Zejun Zeng Zhen Huang Guangjie Liu Qing Chongqing University Chongqing China 《稀有金属材料与工程》2011,(Z3)
The three-layer clad materials consisting of Al(AA1100) / Mg(AZ31) / Al(AA1100) plate was fabricated by the hot roll bonding method. The crucial technological parameters of manufacturing clad sheet, including the threshold rolling reduction and clad-rolling bonding conditions were investigated. This clad sheet was produced successfully by hot roll bonding with the intermetallic phase formation, which can be observed using conventional optical microscope. The bond interfacial structures of the AZ31 / AA1100 ... 相似文献