最新刊期
卷 41 ， 期 8 ， 2021
- 摘要：<正>时间:2021年12月3-6日地点:南昌·嘉莱特精典国际酒店1.会议主办单位中国机械工程学会铸造分会《特种铸造及有色合金》杂志社（武汉）南昌航空大学2.会议承办单位《特种铸造及有色合金》杂志社（武汉）3.会议协办单位广州和德轻量化成型技术有限公司南昌大学中铸产业网4.会议支持单位fsc跨国铸造采购平台帕盛博（苏州）软件科技有限公司广州树森耐火制品有限公司5.会议时间2021年12月3-6日（因疫情影响,会议日期由8月3-6日延期到12月3-6日）6.会议地点南昌嘉莱特精典国际酒店（江西省南昌市八一大道2号）
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发布时间：2023-12-18 - 摘要：Based on the directional solidification and rapid quenching technology, the solidification behavior and phase transformation law of the alloys were obtained by investigating the microstructure and phase characteristics in or near the quenched mushy zones. The results reveal that the application of the technology can provide a significant way for the investigation of solidification process and phase transition process of metal materials, which is expected to provide reference for the investigation of solidification and microstructure control of other metal materials.关键词：Directional Solidification;Solidification Behavior;Solidification Path;Phase Transition
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发布时间：2023-12-18 - 摘要：Magnesium alloy has the advantages of high specific strength, high specific stiffness and good casting performance. It is the lightest structural material and has a good application prospect. In recent ten years, magnesium alloys with long period stacking order（LPSO） structure have attracted more and more attention due to their unique microstructure and excellent mechanical properties in Mg-Y-Zn ternary system. The structure of LPSO phase in Mg-Y-Zn alloy is characterized by periodic stacking faults, accompanied by the enrichment of Zn and Y atoms on specific atomic planes. Because of the large size, the strength of LPSO phase can be improved by short fiber strengthening mechanism. The microstructure and mechanical properties of Mg-based alloy containing LPSO phase can be significantly improved by adding different alloying elements, which can refine the grain structure and mechanical properties of the alloy. The effects of different alloying elements on the microstructure and properties of Mg-Y-Zn alloys containing LPSO phase were reviewed, and the research status in this field was further summarized, which could provide useful references for researchers in related fields.关键词：LPSO Phase;Alloying Element;Mg-Y-Zn Alloy;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：In recent years, due to rapid development of national economy, the demand for electricity from various industries is gradually increased, and the construction of power grid infrastructure is constantly promoted. With the escalation of quantities of high-capacity, high-voltage, remote transmission line, there appear some problems in the running of ordinary steel-cored aluminum stranded wire. In order to meet the national power industry development requirements, it is urgently needed to prepare a new energy-saving conductor with large proportion of draw-weight, desirable sag performance, low energy loss and optimal corrosion resistance. Considering that the electrical conductivity of aluminum alloy can be improved by rare earth elements, the relationship among the material composition, technology and performance of a new rare earth aluminum alloy material was mainly introduced, which can provide reference for engineering application.关键词：Aluminium Alloys;Rare Earth;High Conductivity;Medium Strength
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发布时间：2023-12-18 - 摘要：Multi-principal-element high-entropy alloy extends the composition design to the deep regions of the multicomponent phase diagram, which has no clear difference between solvent and solute. Therefore, these alloys have a more complex composition, unique atom structure and high mixing entropy and manifest lots of distinctive properties, determining that the solidification behavior of the multi-principal element high entropy alloy is different from that of the traditional alloy, especially in aspects of solute redistribution, solidification microstructure formation and grain refinement methods. Based on the complex compositions of multi-principal-element high entropy alloys, the solidification structure, composition segregation and methods of grain refinement of some typical systems were mainly reviewed, and the future research on solidification behaviors and microstructure control was prospected.关键词：Multi-principal-element High-entropy Alloy;Solidification Microstructure;Composition Segregation;Grain Refinement
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发布时间：2023-12-18 - 摘要：<正>"让中国装备技术与世界同步"这是伊之密的宗旨与理念。为了实现这一远大理想,打响中国制造,伊之密不仅在规模上,一次次增资扩产以加强硬件建设,还在技术上苦下工夫,注重提升软实力。2021年,伊之密压铸技术服务中心应运而生,形成一支涵括售前技术支持、压铸岛整体解决方案、模具、压铸工檪檪艺、产品调试等各个环节的技术团队。未来,压铸技术服务中心将成为伊之密面向客户的窗
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发布时间：2023-12-18 - 摘要：<正>近来,青岛科技大学化学院副教授周新红团队在镁金属负极表面成功设计并构筑了一种铋基人工界面保护层,该保护层不仅有效抑制了常用镁电解液体系在镁金属负极上有害的分解反应,而且促进了均匀的镁沉积行为,抑制电池内短路的发生。更为重要的是,改性后镁金属负极匹配各种转化型正极后的全电池性能都表现优异,证明了该保护层的实用化价值。除了上述最新成果,近年来,周新红团队及其合作者们在高性能及高安全的可充镁电池研究方向上做了大量系统深入的前瞻性研究,尤其在新型镁电解质体系开发和镁金属负极界面改性两大方向都取得了重要的阶段性进展,得到了国际同行的高度
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发布时间：2023-12-18 - 摘要：<正>城市旅游一直是一个热门的话题,可持续交通的发展趋势也在不断扩大。为了努力满足新的市场需求,意大利杜卡迪公司与M.T.Distribution签订许可协议。此次合作将涉及研发、分销包括折叠电动自行车和电动踏板车在内的不同车型。通过这次合作,杜卡迪推出了MG-20车型,它是一种
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发布时间：2023-12-18 - 摘要：<正>来自中国科学院大连化学物理研究所的一个科学家团队在《科学进展》杂志上披露了一项让人好奇的研究成果,文章中描述了他们如何设法将普通铜变成一种与黄金和白银"基本性能几乎相同"的材料。大连化学物理研究所洁净能源国家实验室碳资源小分子与氢能利用研究组组长孙剑和他的同事们,利用一股带电的热氩气对一块铜片进行轰击。快速移动的电离粒子将铜原子从目标上炸飞,然后铜原子会在收集装置的表面冷却并凝结,形成一层薄
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发布时间：2023-12-18 - 摘要：<正>科学技术的高效创新与经济社会的快速发展有效带动了工业的不断进步与优化,其为工业发展提供了有效的技术支持与经济保证,这使我国的工业发展正朝向全球领军行列进发。现阶段,全球的工业发展进程进入了一个新的历史纪元,智能技术、信息技术与数字化技术正不断被融入到新兴的工业领域中。这个新的工业发展阶段被当下工业研究学者称为第四次工业革命,即工业4.0。在工业4.0中,像人工智能、自动化机械等技术及技术成果得到了工业生产相关领域的高度重视,各国家研究学者正不断努力将上述新兴技术融入到实际工业生产之中。在工业发展的历史进程中,机械制造行业一直担当着为工业中各领域提供设备支持的重要基础性角色,而在机械制造业中,机械铸造环节尤为重要,优劣与否决定着产出产品的质量及性能。因此,大力推动机械铸
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发布时间：2023-12-18 - 摘要：<正>大数据、云计算、人工智能等一系列高新技术成为当今时代强有力的代名词,并逐步与人们的日常生活相交融,改变着人们的思维和行动方式。网络时代的到来,网络文化的渗透,高校日益注重对学生全面素质的提升,为高校的思想政治教育工作带来了新的发展机遇。铸造专业作为高校设置的众多专业之一,为我国铸造业建设培养优秀人才,对促进我国铸造业的创新发展,增强我国综合实力具有重要意义。《铸造工艺设计与实践》一书共分为10个章节,书中系统介绍了铸造工艺方案设计、砂芯设计、浇注系统设计、铸造工艺装备设计、铸造工艺新技术等内容。全面贯彻了当前铸造领域技术设计的相关标准和行业准则,对案例的解读与分析更加精准到位,具有很强的实用性。成为
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发布时间：2023-12-18 - 摘要：<正>伴随经济结构的调整,我国传统产业发生转型,新的大型产业开始涌现,成为产业发展的趋势。有色合金和黑色金属的冶炼和铸造技术不断进步,新材料的研发速度和产业化能力也在不断提高。伴随材料技术的发展,新型高强度合金不断涌现,使以铝代铁、以铝代钢成为可能。在互联网等新媒体的推动下,我国铸造业已逐步进入一个更加开放的与世界贸易相结合的阶段。国内外铸造技术研发能力水平、高端铸件制造能力差距正在缩小。伴随"智能化"理念的引入,现代机械化、自动化铸造设备取得很大的发展。铸件生产中的造型和制芯环节,已经开始用自动化流水线代替传统的砂型铸造。与此同时,先进的铸造机器人也开始应用于物流、
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发布时间：2023-12-18 - 摘要：<正>近年,科学技术的创新发展以及社会经济的逐步提升,工业社会正在经历一场前所未有的变革,相关研究学者将这场变革称为第四次工业革命。在第四次工业革命进程中,工业的发展正朝着智能化与自动化的方面不断迈进,并催生出了一系列的高新技术领域,例如物联网、3D打印、人工智能、自动化机器人、云数据、生物技术等,这些新兴的智能技术将人工密集型的工业社会逐步过渡为由机械自动化所主导的新型工业社会,而这种新型的工业社会也被学者们广泛称为工业4.0时代。为了应对这个巨大变革的时代,工业社会正自上而下进行着创新与进步,这将有效提高各行业的生产效率与生产水平,
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发布时间：2023-12-18 - 摘要：<正>在工业发展的历史进程中,铸造类行业及铸造类相关产业一直是工业发展的中坚力量,其在工业领域的下游工业生产链条中承担着为其他行业生产企业提供原材料、基础设施、运行设备的重要角色,因此,铸造类产业的可持续发展是推动工业发展与进步的重要力量。同时,铸造类行业具有一定的专业特殊性,其不但需要相关人员具有实践与创新能力,还对从业者的思政建设具有较高要求,这在保证铸造类领域生产的产品设备质量和提高铸造类生产水平中具有重要意义。面对这一实际需求,为铸造领域培养更多、更优秀的铸造类专业人才至关重要,而对高校铸造类专业学生的思想政治教育则是保证其具
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发布时间：2023-12-18 - 摘要：<正>随着科学与技术的不断创新与发展,中国的工业发展水平在近几十年内发生了翻天覆地的变化,并且不断地向着以科技和自动化为核心的社会所发展。现阶段,我国的工业发展水平已经到达了一个新的阶段,工业领域及工业相关产业已经逐步由过去的密集型劳动向智能化、自动化生产过渡。在现代的工业社会中,锻造领域及锻造相关产业作为工业发展的中坚力量,其扮演了制造半成品,并为上游工业领域提供基础设备的重要角色,因此,工业领域中锻造产业的蓬勃发展已经成为保证并促进工业长足可持续发展的主要领域之一。面对与这一工业发展背景,不断为锻造领域培养符合要求的时代工作者已经成为相关领域管理者及教育学者所重点考虑的问题之一,这关系着工业社会的整体发展进程,并牵
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发布时间：2023-12-18 - 摘要：<正>随着高等职业教育越来越被重视,新的教学体系研究成为当前大多数学校教育改革的主要方向,其中机械工程制图教育教学新体系的研究成为时下机械制图高职教育的重要内容,不仅实现了机械制图教育体系研究的大发展,也为社会输送了大量的优质机械工程制图型人才。机械制图专业是使用投影法绘制工程图的理论、技术、方法等课程标准,为国家输送制图能力强,读图能力高,空间逻辑能力优秀的人才。面对当前教学实践课的发展,新的机械制图工程教育教学体系需要从设计能力、创新能力的教学模式出发,突出高等职业教育下的学生自我创新性、探究性思维,同时本体系可为其他院校工程提供设计思路与参考,指导其他工程实践课程的学习,为专业课学习提供参考。区别于传统教育,新的教学体系需要具有以下特
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发布时间：2023-12-18 - 摘要：<正>在现代工业的发展历史长河中,铸造领域及铸造相关产业一直在工业社会中扮演着极为重要的角色,其为上游工业制造产业提供了基础技术与基本生产设备,因此,不管在哪一工业时代,铸造产业的健康发展一直是相关研究者所重点考虑的问题。现阶段,工业的发展逐步向智能化、自动化的方向发展,众多新兴科学技术被广泛地应用于工业实际生产任务,如物联网、智能生产机器人、智慧物流等已经为工业生产创造了极大的商业价值,这种新的工业生产模式变革也被学者们成为第四次工业革命。在当下工业4.0时代,从业者们通过操控自动化生产器械实现了自动化的生产工艺流程,因此,不再需要像之前一样投入大量的精力在手工生产任务之中,而是将更多的注意力投入到生产流程简化、生产技术创新与管理方案优化之中。同时,工业社会快速发展与变革
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发布时间：2023-12-18 - 摘要：The automatic and intelligent cutting process scheme for casting blank grinding was provided, and the segmentation and detection method of casting riser was investigated. FLA-Net, a point cloud network, was put forward based on the improvement of RandLA-NET, and an ACSE coding module combining cosine similarity was proposed to improve the segmentation accuracy of casting riser aiming at the issues that only the distance information is considered and the direction information is ignored in the network. In view of the disorder of point cloud, X space transformation matrix is used referring to the PointCNN segmentation framework, so that the network has space transformation invariance, and the network expression ability and semantic segmentation accuracy are improved. Finally, the experimental results demonstrate that the FLA-Net is more accurate and has a better prospect of engineering application compared with the classical point cloud semantic segmentation framework.关键词：Deep Learning;Casting Riser;Cosine Similarity;Spatial Transformation Invariance
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发布时间：2023-12-18 - 摘要：Fluent platform was used to simulate the heat insulation, natural convection and forced air cooling of a sponge titanium reactor with capacity of 13 t, as well as the temperature field distribution and variation curves of the reactor under different feeding rates. The results indicate that under the condition of heat insulation and natural convection, the temperature in reaction zone is increased with the increase of the feeding rate, where the rate of 705 kg/h is 180 K higher than that of 505 kg/h. At forced air cooling, the temperature field with feed rates of 405, 505, 605, 705 and 805 kg/h is similar to that with 405 kg/h under natural convection, which effectively controls and improves the temperature distribution. The simulation results reveal that the temperature is increased rapidly firstly, and reaches the peak value of 1 358 K at 500 kg/h for 3.44 h, which is stable at 1 262 K after 16.67 h. When feeding rate is 705 kg/h, the temperature reaches the peak of 1 434 K after 1.67 h, and then becomes stable at 1 307 K after 15.28 h.关键词：Fluent Thermal Field Simulation;Titanium Sponge;Magnesium Thermal Reduction Reaction;Reactor;Temperature Field
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发布时间：2023-12-18 - 摘要：In view of falsely high costs, low transportation efficiency and low vehicle utilization caused by manual dispatch of transportation in the process of order delivery and returning of existing foundry enterprises, the order dispatch of foundry enterprises was investigated. A mathematical model of multi-target order dispatch and return transportation with transportation cost, delivery date, and vehicle utilization as indicators was established. A double evolutionary elimination system of teaching and learning algorithm（Diverse poor and rich algorithm-Teaching and learning algorithm, DP-TLBO） was proposed, and a continuous coding method was designed. The reverse learning of the sine acceleration factor was introduced to enhance the local search ability and prevent from falling into the local optimum in the later stage of the search. The dual evolution mechanism of teaching and learning algorithms as well as rich and poor optimization algorithms was adopted to compete and eliminate scheduling schemes. The results of experiments with multiple test functions indicate that the double-evolution elimination teaching and learning algorithm has desirable performance. Finally, the results of multiple scale simulation experiments for two different casting companies reveal that the mathematical model and algorithm proposed lead to the lower costs, higher transportation efficiency and higher vehicle utilization compared with manual transportation methods.关键词：Order Delivery and Return Scheduling;Improved Teaching and Learning Algorithms;Rich and Poor Optimization Algorithm;Sinusoidal Acceleration Factor
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发布时间：2023-12-18 - 摘要：Aiming at the practical problems that the surface adhesion of the anode steel claw is difficult to measure, the ratio of the volume of the adhered material to the volume of the anode steel jaw was defined as the adhesion index of the anode steel claw, which was then converted to the physical quantities related to the diameter of the adherents by analyzing the mathematical model. In order to explore the limitations of commonly used gray scale threshold segmentation methods, a three-channel threshold segmentation method based on RGB was designed. The comparison of algorithm processing results indicates that the method has a comparative advantage on clear binarization effect. The design of the image acquisition system, the image processing flow and the system software writing flow were provided, and the programming platform was adopted to complete the design of visual processing algorithm. The software verification results reveal that the method can measure the adhesion index of anode steel claws accurately.关键词：Anode Steel Claw;Adhesion Index;Monocular Vision;Image Identification;Grayscale
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发布时间：2023-12-18 - 摘要：Aiming at the low cost of rare-earth magnesium alloys under industrial production conditions, combining with the principle of total solute control and rare earth coupling strengthening, Mg-Y-Gd-Sm series casting magnesium alloys were designed. Combining with the DSC curve and the as-cast structure, the proportion of divorced eutectic phases in the alloys was analyzed. Meanwhile, the structure and mechanical properties of the alloys after solution treatment with different processes and the age hardening curves at different temperatures were analyzed comparatively to optimize the solution and age heat treatment process. The results show that the mechanical properties of the Mg-4.5 Y-2.5 Gd-1.5 Sm alloy prepared by the sand mold under the slow cooling condition are relatively desirable after the T6 heat treatment at 530 ℃×24 h+200 ℃×100 h, where the tensile strength, yield strength and elongation reach 267 MPa, 200 MPa, 2.0%, respectively.关键词：Cast Magnesium Alloy;Mg-Y-Gd-Sm;Low Cost;Sand Casting
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发布时间：2023-12-18 - 摘要：5154 aluminum alloy for rivet wire was fabricated by continuous casting and rolling-drawing-intermediate annealing-drawing. The mechanical properties and microstructure of the annealed rivet wire were analyzed by means of tensile testing and SEM observation. The results reveal that the mechanical properties of 5154 alloy for rivet wire are desirable with the annealing temperature of 460 ℃, which is related with the transformation of the second phase and the grain size.关键词：5154 Aluminum Alloy;Mechanical Properties;Second Phase;Microstructure
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发布时间：2023-12-18 - 摘要：The effects of C2Cl6, ultrasonic, flux and argon degassing on hydrogen content and mechanical properties of AZ91 magnesium alloy were investigated. The results show that argon has the satisfeid hydrogen removal effect, where the hydrogen content can be decreased to 7.3 cm3/100 g. The corresponding tensile strength, yield strength and elongation reach 200 MPa, 128 MPa and 5.2%, respectively, at room temperature. Meanwhile, the effects of hydrogen content on the mechanical properties of AZ91 magnesium alloy were investigated. When the hydrogen content in AZ91 alloy is less than 11 cm3/100 g, further degassing of hydrogen content has little effect on mechanical properties.关键词：AZ91 Magnesium Alloy;Degassing;Hydrogen Content;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The casting fluidity of Mg-xGd-1 Er-0.5 Zr（x=8, 10, 12, in mass fraction） alloy was investigated by spiral specimen method. The phase precipitation and microstructure of the alloy during solidification were analyzed by XRD and thermal analysis. The results show that with the increase in Gd content, the nucleation and segregation of α-Mg can be inhibited, and the liquidus is decreased and the free flow time of the alloy melt is increased, reducing the solidification temperature range and improving the fluidity of the alloy. In addition, the grain size of Mg-xGd-1 Er-0.5 Zr alloy is decreased and the flow length is increased with increasing in the Gd content, which is attributed to grain refinement that improves the solid phase ratio of dendrite lapping at the front of liquid flow and delays the dendrite lapping.关键词：Mg-Gd-Er-Zr Alloy;Solidification;Microstructure;Fluidity
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发布时间：2023-12-18 - 摘要：The massive and coating Al2Ni2TiCoCrCu0.5FeMo high-entropy alloys were prepared by vacuum melting and laser cladding. X-ray diffractometer, scanning electron microscope and microhardness tester were employed to analyze microstructure and hardness. The results indicate that both alloys exhibit BCC structure, however, the coating alloy consists of only one BCC phase, while the massive alloy is composed of two BCC phases with different composition but the same lattice constants. Lattice constant is decreased with annealing treatment, where the bulk size is decreased from 0.291 6 nm to 0.290 3 nm, while the coating film is decreased from 0.290 7 nm to 0.288 9 nm. The hardness of the coating alloy is higher than that of massive alloy. Removal of residual stress by annealing leads to the decrease of hardness, and the hardness value of coating is decreased from 853.8 HV to 798.6 HV, while that of massive alloy is decreased from 664.7 HV to 650.9 HV.关键词：High-entropy Alloy;Vacuum Melting;Laser Cladding;Hardness;Microstructure
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发布时间：2023-12-18 - 摘要：In order to improve the corrosion resistance of stainless steel, taking 304, 316 L, 410 and 420 J2 stainless steel plates as raw materials, laser remelting technology was acted on the surface of the plates to analyze microstructure of the remelted layer by optical microscope（OM） and energy spectrometer（EDS）. Electrochemical experiments were conducted to analyze the changes in the corrosion resistance of stainless steel before and after remelting. The results indicate that the microstructure is transformed and grains are refined after laser remelting action on the surface of stainless steel. When the laser power is 1 800 W and the scanning speed is 10 mm/s, the self-corrosion potentials of 304 and 410 stainless steel are-0.005 V and-0.552 V, respectively, which are about 0.008 times and 0.86 times that of the substrate. When the laser power is 1 400 W and the scanning speed is 10 mm/s, the self-corrosion potentials of 316 L and 420 J2 stainless steel are-0.367 V and-0.577 V, respectively, which are 0.67 times and 0.98 times that of the substrate. Therefore, the corrosion resistance of stainless steel can be effectively improved after laser remelting.关键词：Stainless Steel;Laser Remelting;Electrochemistry;Corrosion Resistance
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发布时间：2023-12-18 - 摘要：Effects of pouring temperature on the microstructure, tensile properties and stress rupture properties of K465 nickel base superalloy were investigated. The results reveal that with the increase of pouring temperature in the range of 1 420 ℃ to 1 520 ℃, the grains are coarsened without significant change in the morphology and distribution of carbides, and the content of W element in MC carbide is increased with the γ′ phase growing. After the standard heat treatment（1 210 ℃×4 h）, the irregular shape of γ′ phase is converted to the cubic shape, and the size is obviously refined. Moreover, the size and morphology of γ′ phase in the alloys with different pouring temperature are almost the consistent after the heat treatment. With the increase of pouring temperature, the strength of the alloys tends to be decreased with increasing in elongation, and the stress rupture properties are improved. After that, the crack initiation and propagation mainly occur near the grain boundaries. Finally, the mechanism that pouring temperature affects the mechanical properties of the alloy was discussed.关键词：K465 Alloys;Pouring Temperature;Grain Size;Tensile Properties;Stress Rupture Life
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发布时间：2023-12-18 - 摘要：The effects of double annealing processes（890 ℃×1 h/FC+750 ℃×2 h/AC, 570 ℃×4 h/AC） on the microstructure and mechanical properties of TC18 titanium alloy by laser additive deposition and repair were investigated by tensile testing machine, scanning electron microscope and metallographic microscope, and compared with original forging TC18 titanium alloy. The results indicate that the microstructure of the repaired specimen is characterized by as-cast microstructure, which is mainly composed of lamellar β-grains, and presents the Widmannian structure after double annealing, where the original β grain boundary is still clearly visible, and the interlaced（α+β） clusters are distributed within the grains. After double annealing, the strength of the deposited specimen is lower than that of the original forgings, while the plasticity is the higher. The properties of the repaired specimen are between the two. The impact properties of the repaired specimen are about 60% higher than that of the forgings. After annealing, the mechanical properties of both specimens can reach the prescribed value of TC18 forgings.关键词：Double Annealing;TC18 Titanium Alloy;Laser Additive;Repair;Microstructure and Property
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发布时间：2023-12-18 - 摘要：The effects of recrystallization annealing temperature on the microstructure, mechanical properties and corrosion resistance of NSSC 2120 duplex stainlesss steel were investigated by OM, SEM, universal tensile testing machine and electrochemical workstation.The results indicate that under the annealing temperature in range of 950 ℃ to 1 200 ℃, the two phase ratio（α/γ） of ferrite and austenite is gradually increased, and the layered austenite structure is transformed into small austenite islands.The α fiber texture and γ fiber texture components are gradually generated and strengthened. As the annealing temperature increases, the tensile strength of the alloy is gradually decreased, meanwhile the elongation is firstly increased and then decreased, and the corrosion resistance is firstly decreased and then increased.After annealing at 1 000 ℃, the cold-deformed duplex stainless steel has the desirable mechanical properties, where the tensile strength and elongation are 730 MPa and 58%, respectively. After annealing at 1 200 ℃, the corrosion current density of the material reaches lowest value of 2.5 μA·cm-2, where the corrosion resistance is desirable, and exhibits recrystallized texture components such as Brass texture.关键词：Duplex Stainless Steel;Annealing Temperature;Cold Deformation;Mechanical Properties;Texture
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发布时间：2023-12-18 - 摘要：The fluid-thermal field of 1030 aluminum alloy by roll-casting was simulated by Fluent software, and the influence of casting speed and pouring temperature on fluid-thermal field was investigated. The results reveal that the flow field of aluminum melt in the cavity of Hunter nozzle is dominated by the casting speed. During the roll-casting process, the slower the roll casting speed is, the longer is allocated to the aluminum melt, and the smaller the velocity difference between the middle and the two sides of the nozzle outlet is, however, leading to the longer retention of the molten aluminum in the nozzle and the larger drop of temperature; Effect of pouring temperature on fluid-thermal field of aluminum melt is very limited, which only affects the velocity field in the edge area and the overall temperature distribution of the nozzle and hardly affects the distribution of fluid-thermal field. The condition that the casting speed is set at 1.2 m/min and the casting temperature is set at 695 ℃ is conducive to the flow and filling of melt in the nozzle cavity, which is the most conducive to the flow stability of nozzle and the quality of slab.关键词：1030 Aluminum Alloy;Numerical Simulation;Process Parameters;Fluid-thermal Field
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发布时间：2023-12-18 - 摘要：The effects of heating temperature and cooling mode on microstructure and mechanical properties of mature titanium alloys were investigated. The results indicate that when the content of primary α phases is large and the strength is low, the amount of primary α phases in the microstructure of the alloy can be effectively reduced by increasing a high temperature pretreatment, annealing temperature or cooling rate, implementing the regulatory purposes of improving the tensile strength, high temperature lasting strength and fracture toughness. When the content of primary α phase is less and the plasticity and impact toughness are low, the amount of primary α phases can be increased by controlling the annealing and cooling rate in the two-phase region to achieve the regulatory purpose of improving the tensile plasticity and impact toughness.关键词：Titanium Alloy;Heat Treatment;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The homogenization heat treatment for ingots, solid solution and aging treatment for plate of recycled 7050 aluminum alloy were investigated by optical microscope, direct reading spectrometer, universal testing machine and other experimental methods. The results indicate that the segregation rates of the main elements Cu, Mg, and Zn in the recycled 7050 aluminum alloy remains below 8%, absence of casting defects including cracks and pores in the macrostructure. After homogenization heat treatment of the ingots at 470 ℃ for 20 h, eutectic structure generated under non-equilibrium solidification conditions at the grain boundary diappears. After solution treatment of the plate at 475 ℃ for 0.5 h, the second phases at grain boundary are completely dissolved, where the elongation reaches 34%. Then after aging treatment at 120 ℃ for 24 h, granular precipitates are precipitated dispersedly in the grains, and the mechanical properties of plate present satisfied effect, where the tensile strength, yield strength and elongation reach 608 MPa, 539 MPa and 17.5%, respectively.关键词：Recycled Aluminum Alloy;7050 Aluminum Alloy;Heat Treatment
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发布时间：2023-12-18 - 摘要：In order to obtain stable impact performance of cover of launch container for storage, the influence factors were analyzed. The influence of impact factors such as impact velocity, impact weight and fillet radius of warhead was investigated by orthogonal experiment, and the opening pattern of cover was introduced during impact process. Combined with the deviation analysis, the influence degree of different factors on the impact force of cover was compared. The results indicate that the impact velocity is the main factor affecting impact force of cover. The impact force is decreased with the increase of impact velocity and impact weight, and increased with the increase of fillet radius.关键词：Orthogonal Test;Impact Test;Aluminum Alloy;Cover
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发布时间：2023-12-18 - 摘要：The thermostatic compression experiment of centrifugal casting 40 Cr/Q345 B bimetal was conducted under deformation temperature of 1 223～1 473 K, strain rate of 0.005～1 s-1, and deformation rate of 60% based on Gleeble-3500 thermal simulation testing machine. The thermal deformation behavior of 40 Cr/Q345 B bimetal bonding layer by centrifugal casting was investigated and the thermal processing diagram was established.The results indicate that the rheological stress of 40 Cr/Q345 B bimetal is decreased with the increase of temperature and the decrease of strain rate, and the thermal deformation activation energy is 241.589 kJ·mol-1. Based on the hot working map and microstructure, the parameters of hot working were determined as follows: deformation temperature of 1 293～1 373 K, strain rate of 0.5～1 s-1.关键词：Centrifugal Casting;Bimetallic;Hot Deformation;Hot Processing Maps
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发布时间：2023-12-18 - 摘要：The requirements for chemical composition and mechanical properties of large G10 MnMoV6-3 low alloy steel cable node in Qatar 2022 World Cup stadium project were introduced.The cable node prototype was fabricated by lost foam casting, and the main difficulties during the process were discovered. The key points of quality control such as moulding and modeling, smelting and casting, heat treatment in the casting process were put forward.The results indicate that the chemical and mechanical properties of the cable node by lost foam casting are qualified, meeting the project requirements and the European standards.关键词：G10MnMoV6-3 Low Alloy Steel;Large Cast-steel Cable Node;Casting Process;Heat Treatment
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发布时间：2023-12-18 - 摘要：The application examples of several typical squeeze castings in automobile manufacturing industry were presented. Through the analysis of typical parts, it is proved that squeeze casting is the effective process to improve the properties of castings, which can replace the partial forging to produce those parts with high performance requirements. It is feasible to replace some cast iron and cast steel with aluminum alloy in automobile manufacturing industry and produce high quality castings.关键词：Squeeze Casting;Automobile;Structure Parts;Application
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发布时间：2023-12-18 - 摘要：A control arm in mass production produced by steel stamping and welding was selected as the lightweight example. The target of 25% weight reduction was achieved by light weight design with Al casting concentrated steel aluminum mixed structure control arm. The Al castings were fabricated by squeeze casting process. The design and experiment process show that the aluminum-steel mixed structure control arm with Al casting centralization can meet the requirement, and has potential to great weight reduction.关键词：Control Arm;Aluminum Alloy;Squeeze Casting;Aluminum-Steel Mixed Structure
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发布时间：2023-12-18 - 摘要：The interfacial heat transfer coefficient（IHTC） is one of the boundary condition for the preprocess of casting numerical simulation, which has an important effect on the calculation accuracy of the temperature field during solidification process.The IHTCs between the K4169 alloy and ceramic shell mold were obtained through ProCAST inverse module and the temperature measured from various positions with different thicknesses of the specimens, which was applied to the numerical simulation. The results indicate that the error between calculated and measured temperature is within 3%.关键词：K4169 Superalloy;Investment Casting;Interface Heat Transfer Coefficient;ProCAST Software;Inverse Method
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发布时间：2023-12-18 - 摘要：The detection ability of film hole microcracks by microfocus X-ray imaging method was analyzed for turbine blade machined with artificial simulated defects and turbine guide blade with microcracks. The actual size of artificial simulated defects in turbine blade was calibrated by optical microscope, and seven artificial simulated defects in turbine blade can be effectively detected by the microfocus X-ray imaging method. In addition, the size of artificial simulated defects was measured, and the size measurement results of artificial simulated defects are consistent with the calibration ones. In addition, the microfocus X-ray imaging experiment was designed for turbine guide blade, and the microcracks with length of 392 μm and width of 21 μm in the trailing edge of the turbine guide blade was detected by the microfocus amplification imaging method. The results show that the microfocus imaging method can meet the needs of engineering detection of microcracks in the film hole.关键词：Turbine Blade;Film Hole;Microfocus Imaging;Microcrack
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发布时间：2023-12-18 - 摘要：<正>2021年"第27届中国铸造协会消失模V法实型分会"年会,根据疫情形势预期于2021年7月～8月举办。为做好消失模V法实型铸造分会年会交流内容的组织工作,营造良好学术氛围,推动消失模铸造行业创新、协调、绿色、开放、共享发展,促进行业单位之间交流与合作,展示自身在技术研发、管理创新、生产实践方面等取得成果,现公开广泛征集年会论文。一、征文内容（所有铸造相关技术）1.消失模、V法、实型铸造的基本理论、基本原理、生产设备、检测设备与技术、试验与分析技术、生产应用技术、环保系统、原理与技术、
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发布时间：2023-12-18
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