检索范围:
排序: 展示方式:
Precision forging technology for aluminum alloy
Lei DENG, Xinyun WANG, Junsong JIN, Juchen XIA
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 25-36 doi: 10.1007/s11465-018-0477-y
Aluminum alloy is a preferred metal material for lightweight part manufacturing in aerospace, automobile, and weapon industries due to its good physical properties, such as low density, high specific strength, and good corrosion resistance. However, during forging processes, underfilling, folding, broken streamline, crack, coarse grain, and other macro- or microdefects are easily generated because of the deformation characteristics of aluminum alloys, including narrow forgeable temperature region, fast heat dissipation to dies, strong adhesion, high strain rate sensitivity, and large flow resistance. Thus, it is seriously restricted for the forged part to obtain precision shape and enhanced property. In this paper, progresses in precision forging technologies of aluminum alloy parts were reviewed. Several advanced precision forging technologies have been developed, including closed die forging, isothermal die forging, local loading forging, metal flow forging with relief cavity, auxiliary force or vibration loading, casting-forging hybrid forming, and stamping-forging hybrid forming. High-precision aluminum alloy parts can be realized by controlling the forging processes and parameters or combining precision forging technologies with other forming technologies. The development of these technologies is beneficial to promote the application of aluminum alloys in manufacturing of lightweight parts.
关键词: precision forging aluminum alloy closed die forging flow control forging hybrid-forming technology
周义刚,曾卫东,俞汉清
《中国工程科学》 2001年 第3卷 第5期 页码 61-66
将坯料置于相变的临界点附近10~15℃加热、锻造、锻后水冷,随后,不是采用时效处理,而是先进行高温韧化再低温强化处理。近β锻造的组织不再是等轴α量过多,或是为零的网篮条状α的结构模式;而是约含20%等轴α、50%~60%条状α构成的网篮和β转变基体组成的三态组织。这种结构不仅丰富和发展了国 际上钛合金已有的4种组织类塑(等轴、双态、网篮和并列),而且将等轴和网篮组织的性能优势集于一身,由此带来的力学性能超过了国内外相关技术的性能水平:能在不降低塑性,不丧失热稳定性的条件下,提高材料的高温性能、低周疲劳性能和断裂韧性,在改善性能的同时提高使用温度。近β锻造适用于(α+β)型合金, 还可应用于α、近α和近β型合金,其研究成果已用于制造了多种发动机盘件、飞机和导弹等重要结构件。
Shagufta KHAN,Suman BHOWMICK
《能源前沿(英文)》 2015年 第9卷 第4期 页码 399-412 doi: 10.1007/s11708-015-0374-6
关键词: AC-DC power-flow Newton-Raphson method high voltage direct current (HVDC) control strategy
Red soil for sediment capping to control the internal nutrient release under flow conditions
Lei Xia, Guo Liu, Chunmei Chen, Meiyan Wen, Yangyang Gao
《环境科学与工程前沿(英文)》 2016年 第10卷 第6期 doi: 10.1007/s11783-016-0886-2
关键词: Sediment Red soil capping Flow conditions Nitrogen Phosphorus
Liansuo AN , Zhi WANG , Zhonghe HAN ,
《能源前沿(英文)》 2009年 第3卷 第3期 页码 254-261 doi: 10.1007/s11708-009-0047-4
关键词: wet steam two-phase flow spontaneous condensation numerical simulation flow separation profile loss
Mechanism and control factors of hydrate plugging in multiphase liquid-rich pipeline flow systems: a
Shuwei ZHANG, Liyan SHANG, Zhen PAN, Li ZHOU, You GUO
《能源前沿(英文)》 2022年 第16卷 第5期 页码 747-773 doi: 10.1007/s11708-022-0830-z
关键词: hydrate flow rate water content mechanism of pipeline blockage rich liquid phase system
Water-level based discrete integrated dynamic control to regulate the flow for sewer-WWTP operation
Zhengsheng Lu, Moran Wang, Mingkai Zhang, Ji Li, Ying Xu, Hanchang Shi, Yanchen Liu, Xia Huang
《环境科学与工程前沿(英文)》 2020年 第14卷 第3期 doi: 10.1007/s11783-020-1222-4
关键词: Sewer system Integrated control Discrete control Water level
GUAN Zailin, PENG Yunfang, MA Li, ZHANG Chaoyong, LI Peigen
《机械工程前沿(英文)》 2008年 第3卷 第4期 页码 454-461 doi: 10.1007/s11465-008-0083-5
关键词: appropriate management technology scheduling technology different
Substance flow analysis for an urban drainage system of a representative hypothetical city in China
Hua BAI, Siyu ZENG, Xin DONG, Jining CHEN
《环境科学与工程前沿(英文)》 2013年 第7卷 第5期 页码 746-755 doi: 10.1007/s11783-013-0551-y
关键词: substance flow analysis (SFA) urban drainage system representative hypothetical city (RH city) water pollution control
《环境科学与工程前沿(英文)》 2022年 第16卷 第8期 doi: 10.1007/s11783-022-1531-x
• Ceramic membrane filtration showed high performance for surface water treatment.
关键词: Ceramic membrane Coagulation Polytitanium chloride Membrane fouling
Numerical study of internal flow field and flow passage improvement of an inlet particle separator
Florian PAOLI, Tong WANG
《能源前沿(英文)》 2011年 第5卷 第4期 页码 386-397 doi: 10.1007/s11708-011-0156-8
关键词: streamlines pressure losses flow passage improvement inlet particle separator (IPS)
流体内磁驱动微米机器人运动前沿研究综述 Review Article
苗佳淼1,2,王潇朴2,周燕2,叶敏2,赵洪宇2,许若愚1,钱辉环1,2
《信息与电子工程前沿(英文)》 2023年 第24卷 第11期 页码 1520-1540 doi: 10.1631/FITEE.2300054
关键词: 微米机器人;流体;动力学建模;控制
陆钟武
《中国工程科学》 2006年 第8卷 第1期 页码 18-25
流动,是物质(如铜、铝等)流动和流体流动二者所具有的基本特征,基于这个论点,简要地回顾了流体力学中研究流体流动的两种方法,即拉格朗日法和欧拉法;相应地提出了物质流分析的两种方法,即跟踪观察法和定点观察法。由于前者在文献中未见报道,因此对它进行了重点说明。强调了物质流的跟踪观察法既适用于稳态物质流(产品产量不变),也适用于非稳态物质流(产品产量增长或下降)。以钢铁产品生命周期的铁流图为例,说明了物质流的跟踪模型。在引入了物质流的非稳度后,提出了物质流各项指标的计算式,以及它们之间的相互关系。以瑞典铅酸电池系统为对象,计算了其中铅流的各项指标,并进行了必要的分析。
UPFC setting to avoid active power flow loop considering wind power uncertainty
Shenghu LI, Ting WANG
《能源前沿(英文)》 2023年 第17卷 第1期 页码 165-175 doi: 10.1007/s11708-020-0686-z
关键词: active power loop flow (APLF) unified power flow controller (UPFC) wind power uncertainty interval power flow (IPF)
标题 作者 时间 类型 操作
Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence
Shagufta KHAN,Suman BHOWMICK
期刊论文
Red soil for sediment capping to control the internal nutrient release under flow conditions
Lei Xia, Guo Liu, Chunmei Chen, Meiyan Wen, Yangyang Gao
期刊论文
Numerical study and control method of interaction of nucleation and boundary layer separation in condensingflow
Liansuo AN , Zhi WANG , Zhonghe HAN ,
期刊论文
Mechanism and control factors of hydrate plugging in multiphase liquid-rich pipeline flow systems: a
Shuwei ZHANG, Liyan SHANG, Zhen PAN, Li ZHOU, You GUO
期刊论文
Water-level based discrete integrated dynamic control to regulate the flow for sewer-WWTP operation
Zhengsheng Lu, Moran Wang, Mingkai Zhang, Ji Li, Ying Xu, Hanchang Shi, Yanchen Liu, Xia Huang
期刊论文
Operation and control of flow manufacturing based on constraints management for high-mix/low-volume production
GUAN Zailin, PENG Yunfang, MA Li, ZHANG Chaoyong, LI Peigen
期刊论文
Substance flow analysis for an urban drainage system of a representative hypothetical city in China
Hua BAI, Siyu ZENG, Xin DONG, Jining CHEN
期刊论文
Enhanced cross-flow filtration with flat-sheet ceramic membranes by titanium-based coagulation for membranefouling control
期刊论文
Numerical study of internal flow field and flow passage improvement of an inlet particle separator
Florian PAOLI, Tong WANG
期刊论文
Petros Ioannou:自动驾驶连通性和交通流量控制(2019年9月18日)
2021年08月12日
会议视频