检索结果-南通市图书馆

HCWCI/Carbon Steel Bimetal Liner by Liquid-Liquid compound Lost Foam Casting

Journal of Iron and Steel Research International 2012年第10期19卷 13-19页

作者： XIAO Xiao-feng1,2, YE Sheng-ping2, YIN Wei-xin3. XUE Qiong4 (1. School of Mechanical Engineering and Automation, wuhan Textile University, wuhan 430073, hubei,{3. 2. State Key Laboratory of material Processing and Die and Mould technology, Huazhong University of science and technology, wuhan 43.074, hubei,{3. 3. wuhan zhike abrasive-resistant material science and technology development co ltd, wuhan 430073, hubei,{3. 4. college of science, wuhan University of technology, wuhan 43.079, hubei,{3.) School of Mechanical Engineering and Automation Wuhan Textile University Wuhan Hubei China State Key Laboratory of material Processing and Die and Mould technology Huazhong University of Science and Technology Wuhan Hubei China wuhan zhike abrasive-{3. material science and technology development co ltd Wuhan Hubei China college of science Wuhan University of Technology Wuhan Hubei China

Impact, friction and corrosion from the grinding balls and the grinding medium during the mineral processing result in liner breakage. Liner, made from Hadfield steel or alloyed steel, could not have served in wet grinding environment for more than ten months. composite liner, made from HCWCI (high Cr white cast iron) and carbon steel, has been developed successfully with liquid-liquid composing process based on LFC (lost foam casting). The microstructure of composite was analyzed with optical microscope, SEM (scanning electron microscope)/EDX energy-dispersive X-ray and XRD (X-ray diffraction). According to micrograph, the combination region of two metals was staggered like dogtooth, no mixtures occurred between two liquid metals, and its interface presented excellent metallurgical bonding state. The results of mechanical property test show that, the hardness of HRC, the fracture toughness, and the bending strength are more than 61, 16.5 J/cm2 and 1 600 MPa, respectively. comparison between liners made from bimetal composite and alloyed steel has also been investigated in industrial hematite ball mill. The results of eight months test in wet grinding environment prove that the service life of bimetal composite liner is three times as long as that of one made from alloyed steel.

关键词： composite liner bimetal liquid-liquid compound composite interface lost foam casting high Cr white cast iron

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The characteristics of arc beam shaping in hybrid plasma and laser deposition manufacturing

引用

science china(Technological sciences) 2006年第2期49卷 238-247页

作者： ZHANG Hai’ou1, QIAN Yingping1,3. WANG Guilan1 & ZHENG Qiguang2 1. School of material science and technology, Huazhong University of science and technology, wuhan 43.074, china 2. Institute of Laser technology and Engineering, Huazhong University of science and technology, wuhan 43.074, china 3. Mechanical Engineering college, hubei University of technology, wuhan 43.068, china School of material science and technology Huazhong University of Science and Technology

As a new direct metal prototyping technology,the hybrid plasma and laser deposition manufacturing (PLDM) is proposed in this paper. In order to figure out the characteristics of plasma arc beam and mould in the PLDM process of high temperature alloy, the high speed CCD camera is used to obtain the picture around the plasma arc. Afterwards the sketch of picture is clearly obtained. And the effect of laser parameter, such as average power, pulse width, pulse repetition frequency and the angle between laser beam and plasma arc beam on the plasma arc appearance, is studied experimentally. The results show that the modality of plasma arc beam is markedly influenced by laser beam. And the improvements of shape precision and surface state of the layer deposited by PLDM are confirmed.

关键词： plasma hybrid laser, direct deposition, plasma arc beam, molding character, high-temperature alloy.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Internal Curing Using Water-releasing material for High Strength Micro-expansive concrete

引用

Journal of wuhan University of technology(materials {3.) 2009年第3期24卷 510-513页

作者：吕林女 School of science Wuhan University of Technology

Due to its low water content, it is difficult for expansive agent to have an effective expansive effect on high strength concrete to compensate its extensive shrinkage and form a certain expansion. To solve this problem, water-releasing material with water storage and releasing characteristics was incorporated into high strength micro-expansive concrete to provide internal curing, and expansive effect of expansive agent was improved. Migration of water from initially saturated water-releasing material to the surrounding hydrating cement paste was investigated. Based on a given efficient diffusion distance of water stored in water-releasing material, the mass and real water-cement ratio of cured cement paste were estimated. At the same time, the effect of internal curing of water-releasing material on the volume deformation of high strength micro-expansive concrete was investigated.

关键词： water-releasing material high strength concrete expansive internal curing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

development of Mathematical Model on Preparation of Functionally Graded material by co-sedimentation

引用

Journal of materials science & technology 2001年第2期17卷 275-277页

作者： Zhongmin YANG, Lianmeng ZHANG and Qiang SHEN Institute of materials science and Engineering, wuhan University of {3., wuhan 43.070, china Inst. of Mat. Sci. Wuhan Univ. of Technol. Wuhan 430070 China

From the process of sedimentation the mathematical relationships among deposition Volume and powder properties as well as sedimentation parameters were deduced. Based on the formula a mathematical model was set up and simulated through the computer. At last the validity of mathematical model was supported by the representative experiment on Ti-Mo system FGM prepared by co-sedimentation.

关键词： co Mo development of Mathematical Model on Preparation of Functionally Graded material by co-sedimentation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructures and fatigue-free properties of the La^(3.) and Nd^(3.) doped Bi_4Ti_3._(12) thin films prepared by modified sol-gel technique

引用

science china(Technological sciences) 2008年第11期51卷 1843-1849页

作者： LI MeiYa1,2, PEI Ling1, LIU Jun1, YU BenFang1, GUO DongYun1, SUN XiaoHua3.& ZHAO XingZhong1,2 1 Department of Electronic science and technology, School of Physical science and technology, wuhan University, wuhan 43.072, china 2 Key Laboratory of Acoustic and Photonic material and Device of the Ministry of Education, wuhan Uni- versity, wuhan 43.072, china 3.School of Mechanical and material Engineering, china Three Gorges University, Yichang 443.02, china Department of Electronic science and technology School of Physical Science and Technology

Ferroelectric Bi3.25La0.75Ti3.12 (BLT) and Bi3.15Nd0.85Ti3.12 (BNT) thin films were fab- ricated on Pt/TiO2/SiO2/Si (100) substrates by a modified sol-gel technique. X-ray diffraction indicated that these films were of single phase with random polycrystal- line orientations. The surface morphologies of the films were observed by scanning electron microscope, showing uniform, dense films with grain size of 50―100 nm. Well-saturated hysteresis loops of the films were obtained in metal-ferroelectric- metal type capacitors with Cu top electrodes at an applied voltage of 400 kV/cm, giving the remanent polarization (2Pr) and coercive field (2Ec) values of the films of 25.1 μC/cm2 and 203.kV/cm for BLT, and 44.2 μC/cm2 and 296 kV/cm for BNT, re- spectively. Moreover, these capacitors did not show fatigue behaviors after up to 1.75×1010 switching cycles at the test frequency of 1 MHz, suggesting a fatigue-free character. The influences of the La3. and Nd3. doping on the properties of the films were comparatively discussed.

关键词： bismuth oxides ferroelectrics fatigue sol-gel technique

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High Activated Mineral Admixture Slurry Made by Wet-discharged Fly-ash Promoted by Matrix Bonding component

引用

Journal of wuhan University of technology(materials {3.) 2009年第5期24卷 826-829页

作者：马保国 Key Laboratory for Silicate materials science & Engineering of Ministry of Education Wuhan University of Technology

The mineral admixture slurry was made by wet-discharged fly-ash （WDFA） promoted by matrix bonding component （MBC）, and the strengths, hydration products change （XRD, SEM） of cement paste made by the slurry were studied. The results indicate that in the process of wet-milling preparation, there is a prime proportion （70︰3.） between wet-discharged fly-ash and matrix bonding component in the slurry. The physical activation of wet-milling and chemical activation of modified agents accelerate the hydration of cement including the cement and mineral which has not hydrated completely in the matrix bonding component. And the hydrated part of matrix bonding component can play the function of inducing crystallization, which can accelerate secondary hydration reaction of fly-ash.

关键词： matrix bonding component wet-milling slurry activation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Manufacture of the Ultrafine Grain WC/co Cemented Carbides by combined Sintering Processing

引用

International Journal of Minerals,Metallurgy and materials 1999年第3期13卷 208-213页

作者： Binghai Liu Yue Zhang Shixi Ouyang Qikai Li(Institute of Technical Physics and Chemistry, East china University of science and technology , Shanghai 20023., china)(material science and Engineering School. University of science and technology Beijing, Beijing 100083. china)(State Key Laboratory for Synthesis and Processing of Advanced materials. wuhan University of science and technology, wuhan 43.070, china,) Institute of Technical Physics and Chemistry East China University of Science and Technology Shanghai 200237 China State Key Laboratory for Synthesis and Processing of Advanced materials Wuhan University of Science and Technology Wuhan 430070 China material science and Engineering School University of Science and Technology Beijing Beijing 100083 China

A new kind of sintering process, combined sintering process. i.e. vacuum sintering plus hot isolate pressure sintering (HIP), was introduced for producing ultrafine WC-10% co (mass fraction. so as the follows) cemented carbides. The effects of some processing parameters on the microstructure and mechanical properties of the obtained cemented carbides were studied. The results show that the rapid shrinkage and the pronounced densification of tile cemented carbides took place during the vacuum sintering stage, which is intinaately correlated with the local liquid sintering occurred during this earl} sintering stage for the high surface activity of ultrafine WC-co powder. The way of high pressure imposing. isothermal treatment cycle during *** sintering and HIP sintering stage directly influence the densitication of compacts and the mechanical properties of the produced WC-10%co cemented carbides.

关键词： ultrafine WC-co cemented carbides vacuum sintering HIP sintering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Numerical simulation of the transient multiphase field during plasma deposition manufacturing composite materials

引用

science china(Physics,Mechanics & Astronomy) 2009年第4期52卷 508-517页

作者： KONG FanRong1,2,ZHANG HaiOu1 & WANG GuiLan3.1 State Key Laboratory of Digital Manufacturing Equipment and technology,Huazhong University of science and technology,{3. 43.074,china 2 Research Center for Advanced Manufacturing,Southern Methodist University,3.01 Dyer Street,Dallas,Texas 75205,USA 3.college of material science and Engineering,Huazhong University of science and technology,{3. 43.074,china State Key Laboratory of Digital Manufacturing Equipment and technology Huazhong University of Science and Technology Wuhan China Research Center for Advanced Manufacturing Southern Methodist University Dallas USA college of material science and Engineering Huazhong University of Science and Technology Wuhan China

A solid/liquid/gas unified model has been developed to investigate the gradient composition formation during the plasma deposition manufacturing(PDM) composite materials process. In this model,an enthalpy porosity model was applied to deal with the melting and solidification of the deposited layer,and a level-set approach was introduced to track the evolution of the free surface of the molten pool and the deposited layer. Moreover,complicated physical phenomena occurring at the liquid/gas interface,including forced convection heat loss,heat emission and plasma heat source,have been incorporated into the governing equations by source terms. In this study,the numerical experiment of nickel base alloy powder deposited on the medium steel substrate by PDM technique was implemented based on the staggered grid and SIMPLEC algorithm. concentration gradient distribution of the solute material at the composite material interface,fluid flow and temperature distribution in the molten pool and the deposited layer have been investigated in detail.

关键词： plasma deposition manufacturing composite material solid/liquid/gas unified model level-set approach

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Design and Properties of G.656 Optical Fiber Waveguide Design

引用

Journal of wuhan University of technology(materials {3.) 2007年第1期22卷 70-73页

作者：成煜 Key Laboratory of Silicate materials science and Engineering Wuhan University of Technology Ministry of Education FiberHome Telecommunication Technologies co. LTD WuHan 430074China

To prepare the G.656 optical fiber for the future＇s network, the methods of material design and waveguide design were applied to predict theoretic properties of the fiber. PCVD process was applied to manufacture the multi-layer GeO2, F co-doped SiO2 materials. The fiber properties were tested for the cut-off wavelength, MFD, dispersion, etc. The tested results agreed with the theoretic prediction.

关键词： G.656 Waveguide dispersion metro

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Performance of CTBN(carboxyl-terminated poly (butadiene-co-acrylonitrile))-EP(diglycidyl ether of bisphenol-A (DGEBA)) Prepolymers and CTBN-EP/polyetheramine (PEA) System

引用

Journal of wuhan University of technology(materials {3.) 2009年第5期24卷 757-762页

作者：石敏先黄志雄 School of material science and Engineering Wuhan University of Technology

CTBN-EP prepolymers were synthesized from CTBN and epoxy resin under the catalysis of HTMAB. FTIR analyses indicate the formation of ester group between the carboxyl group of CTBN and the oxirane group of epoxy resin. The viscosity of modified prepolymer increases with CTBN content increasing, but the epoxy value of the prepolymer decreases greatly. DSC analyses verify that CTBN affects the curing process of CTBN-EP/PEA system. Mechanical testing presents the improved toughness of CTBN-EP/PEA curings for the decrease of tensile strength, flexural strength and compressive strength, and increase of impact strength and elongation-at-break with the CTBN content increasing. SEM micrographs show the rubber phase with many holes in diameter about 0.5-1.5 μm is formed when CTBN content is lower than 10 phr. However, the pattern of SEM graph shows some stalactite-like strips when CTBN content is higher than 15 phr. Furthermore, the SEM image of 25 phr CTBN sample forms a kind of co-continuous structure.

关键词： carboxyl-terminated butadiene acrylonitrile (CTBN) copolymer epoxy resin prepolymer epoxy value mechanical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：