降低深冲制耳率的工业纯铝板生产工艺研究

以1100-O冷轧工业纯铝板为研究对象,采用力学拉伸试验、冲杯试验及织构分析等手段,跟踪检验了三种不同中间退火处理工艺生产的板料性能,通过调整中间退火工艺降低材料的制耳率,达到成品性能要求.     

均匀化退火对纯铝铸轧-冷轧板各向异性的影响

采用晶体取向分布函数（ODF）对织构进行检测及金相组织观察,研究不同的均匀化退火制度对纯铝铸轧一冷轧板材各向异性的影响。结果表明,对1100板材进行不同方案的均匀化退火,当均匀化退火制度为580℃／13h时,板材立方织构组分比例迅速下降,同时铜织构也有所下降,但散漫度较大,同时晶粒细小均匀,随机织构比例增大,制耳率低于2．5％,板材各向异性减小。均匀化退火制度主要通过改变板材织构组分、比例、晶粒度以及改变Fe和Si组织形态的变化等影响纯铝铸轧板材的各向异性。     

化妆品包装壳体和盖用1050铝板材生产工艺研究

研究了冷轧及退火制度对1050深冲铝板材制耳的影响。制定出合理的工艺制度，降低了板材的各向异性，生产出具有较低制耳率的深冲板材，适用于制取化妆品壳体和盖。     

工艺因素对3104铝合金板材织构和制耳的影响

研究了主要工艺参数对３１０４铝合金板材织构和制耳的影响。研究发现，提高热轧终轧温度，加大热轧压下率和中间退火前采用小压下率冷轧，均可能增加３１０４合金板材立方织构含量，降低制耳率，减小各向异性。     

制备工艺对电池壳用Al-Mn系合金成形性微观机制的影响

采用金相显微镜、共聚焦显微镜、扫描电子显微镜、透射电镜、电子背散射衍射技术和力学分析等手段研究了Al-Mn系合金板材的制备工艺对锂离子电池壳用板材成形性微观机制的影响。结果表明：与热轧供坯制备的板材相比,由于铸轧供坯生产的板材的表面粗糙度及氧化膜厚度偏大,导致冲压时碎屑卡模而影响了电池壳的成形效率。通过铸轧供坯在580℃的均匀化退火细化晶粒和分散铸轧枝晶间隙的第二相组织,以及在380℃成品退火控制第二相尺寸及其弥散析出,使轧制织构减弱,随机织构和Cube织构增强,控制一定的力学性能使各向异性减弱,制耳率降低,进而使板材的成形性提高。     

工业钛材压力容器的声发射特性

国内外化工领域对钛材压力容器声发射检测的研究不多,对工业纯钛板材和工业钛制压力容器的声发射特性进行了试验。试验结果表明:声发射传感器在工业纯钛板材及钛制压力容器上的布置间距可达到4.5m,声发射定位源强度的下限可确定为60dB左右。结果可为该材料压力容器声发射检测的研究提供一定的数据支持。     

不同轧制路径对工业纯钛板机械各向异性及成形性的影响（英文）

研究了不同轧制路径对工业纯钛板机械各向异性及成形性的影响。路径A和路径B是分别沿原始轧向和横向的单向轧制,路径C是交叉轧制,即每次轧制之后旋转90°继续轧制。测试了不同轧制路径获得板材的显微织构、力学性能(强度、伸长率)和各向异性。X射线衍射结果表明从路径A到路径C,轧制板材的织构逐渐减弱。与路径A和路径B相比较,路径C轧制的板材的平面各向异性系数更小。拉深实验显示交叉轧制可以有效地避免制耳的产生;杯突实验表明交叉轧制可以提高钛板成型能力。     

生产工艺参数对动力电池壳用3003-H14铝合金带材制耳率影响

试验研究了主要生产工艺参数对动力电池壳用3003-H14铝合金带材制耳率及织构的影响。结果表明,提高热轧终轧温度,降低中间退火前冷轧加工率,在原有中间退火前增加一次退火,均有利于增加3003-14铝合金带材立方织构的含量,减小材料的各向异性,降低深冲制耳率。其试验工艺参数可为生产3003-14铝合金带材时控制制耳率及织构提供参考。     

缸体3004铝合金板材的工艺控制特点

罐体3004铝合金板材不但希望材料有良好的成形性,而且要求材料深冲时有小的制耳率。因此希望深冲时能得到8个耳。本文主要对材料的化学成分铸造组织、热轧、中间退火和冷轧的工艺控制特点进行了分析,提出了使3004铝合金板材深冲时得到8个耳的、新的、更为合理的工艺控制方法。     

冷变形对5052铝合金板材力学性能及制耳率的影响

利用光学显微镜、拉伸试验机及制耳率测试仪研究了冷变形对5052铝合金板材晶粒尺寸、力学性能及制耳率的影响。结果表明,5052铝合金冷轧板材的屈服强度与冷变形率呈线性关系,10%的变形量引起的抗拉强度的变化约为20 MPa,屈服强度的变化约为15 MPa。经再结晶退火后,退火板的晶粒尺寸与冷变形率及屈服强度均呈线性关系。冷变形率在50%~60%时,退火板的制耳率及平面各向异性指数Δr值均较小。     

新型的治疗阿尔茨海默氏症药物(1-二甲基磷酰基-2,2,2-三氯)-乙基-1-醇烟酸醋对体外神经细胞的作用

目的: 观察本实验室合成的一种治疗阿尔茨海默氏症(AD)的药物(1-二甲基磷酰基-2, 2, 2 -三氯)-乙基^-1-醇烟酸醋(NMF),对体外培养的皮层神经细胞活性的影响以及对海人藻酸(KA)所致的神经损伤的保护作用。方法: 采用体外培养皮层神经元的方法,解剖分离 15 d胚胎小鼠皮层神经细胞, 接种于 96孔板,48 h 后加药并培养 72 h,以 MIT 法 观察 NMF 对小鼠皮层神经细胞活性的影响;同时将接种于 24 孔板的细胞预先给予 NMF,d 3 时加或不加KA处理后,以台盼蓝染色鉴别并计数死、活细胞,可得出细胞的存活率。结果: NMF 明显促进胎鼠皮层神经元活性,其中 NMF1、0. 1、10nmol·L^-1促进神经元活性增殖率分别高达 34.7%、37.4%、36. 7%, NMF 明显促进正常胎鼠皮层神经元存活卒,与对照组比较,10nmol·L^-1 NMF 对皮层神经元的存活率分别提高 39.3%、73.5%。 NMF能显著 对抗 KA 所致的神经元损伤,与 KA 损伤组相比, NMF0.1、10、10nmol·L^-1对损伤皮层神经元的保护率分别为 77.30%、80.10%、84.15%。结论: NMF 明 显促进胎鼠皮层神经元的洁性、提高正常皮层神经元,的存活卒,并能有效地保护KA所致的神经元损伤,提示 NMF 是一种很有潜力的治疗 AD 的药物。     

Three-Dimensional Growth of Coherent Ferrite in Austenite: A Molecular Dynamics Study

Coherent second phase often exhibits anisotropic morphology with specifi c orientations with respect to both the second and the matrix phases. As a key feature of microstructure, the morphology of the coherent particles is essential for understanding the second-phase strengthening eff ect in various industrial alloys. This letter reports anisotropic growth of coherent ferrite from austenite matrix in pure iron based on molecular dynamics simulation. We found that the ferrite grain tends to grow into an elongated plate-like shape, independent of its initial confi guration. The fi nal shape of the ferrite is closely related to the misfi t between the two phases, with the longest direction and the broad facet of the plate being, respectively, consistent with the best matching direction and the best matching plane calculated via the Burgers vector content(BVC) method. The strain energy calculation in the framework of Eshelby's inclusion theory verifi es that the simulated orientation of the coherent ferrite is energetically favorable. It is anticipated that the BVC method will be applicable in analysis of anisotropic growth and morphology of coherent second phase in other phase transformation systems.     

Rheology Feature of Simple Metal Melt

The rheology feature of Sb, Bi melt and alloys was studied using coaxial cylinder high-temperature viscometer. The results showed that the curve of torsion-rotational speed for Sb melt presents a linear relation in all measured temperature ranges, whereas for the Bi melt, the curve presents obvious non-Newtonian feature within the low temperature range and at relative high shear stress. The rheology feature of Sb80Bi20 and Sb20Bi80 alloy melts was well correlated with that of Sb and Bi, respectively. It is considered that the rheology behavior of Sb melt plays a crucial role in Sb80Bi20 alloy and that of Bi melt plays a crucial role in Sb20Bi80 alloy.     

Effect of Short-Time Aging on the Pitting Corrosion Behavior of a Novel Lean Duplex Stainless Steel 2002

The effect of short-time aging in the temperature range between 400 and 1000 °C on the pitting corrosion behavior and mechanical property of a novel lean duplex stainless steel(LDSS) 2002 was investigated through the potentiostatic critical pitting temperature(CPT) tests and the Charpy impact tests. Both the pitting corrosion resistance and the toughness of aged specimens degraded due to the precipitation of detrimental secondary phases and the most significant reduction of CPT and impact energy emerged at 650 °C concurrently. The CPT of LDSS 2002 specimen aged at 650 °C decreased by 28 °C, and the impact energy dropped from 69 to 29 J/cm~2 compared with the solution-annealed sample. Transmission electron microscopy characterization showed that the main precipitates in LDSS 2002 were Cr_2N and M_(23)C_6 along the ferrite–austenite grain boundaries.     

INTRODUCTION TO PATENTS

The invention provides a method of making a mold which can reduce SOx generation rate while preventing decrease in hardening rate in the case of using sulfuric acid for a hardener composition. The method has a mixture step in which fire-resistant particles, a hardener composition and a binder composition are mixed to obtain a composition for a mold. The hardener composition contains sulfuric acid. In the mixture step, sodium carbonate is added. A molar ratio of the sulfuric acid to the sodium carbonate is 0.5 or more and 4.0 or less.     

China Foundry Week 2014

China Foundry Week, hosted by the Foundry Institution of Chinese Mechanical Engineering Society （FICMES） each year, is a large academic event in China. It is one of the ten high-impact activities sponsored by the Chinese Mechanical Engineering Society.     

17th Conference of Hydrodynamic and Electromechanical Control Engineering Call for papers

正1.Contents In order to promote the academic exchanges and technical communication of the research in the field of fluid power transmission and control,fluid control engineering specialized committee of the Chinese Society of Theoretical and Applied Mechanics will hold the 17th Conference of Hydrodynamic and Electromechanical Control Engineering on July 27-29,2014 in Tibet,Lhasa city.     

Information for Contributors

正The Transactions of Nonferrous Metals Society of China,founded in 1991 and sponsored by The Nonferrous Metals Society of China,is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology,including mineral processing,extraction metallurgy,metallic materials and heat treatments,metal working,physical metallurgy,powder metallurgy,with the emphasis     

Preface

<正>We are pleased to present this Special Issue of Transactions of Nonferrous Metals Society of China containing selected papers from the First Asian Conference on Aluminum Alloys(ACAA-2013),held in Beijing,China,13–17 October 2013.This conference has been initiated,with approval of     

Information for Contributors

The Transactions of Nonferrous Metals Society of China, founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, 1NSPEC, CA, METADEX, AJ and JICST.