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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-{13. Material science and technology development co ltd, wuhan 430073, hubei,{3. 4. college of science, wuhan University of technology, wuhan 43.079, hubei,{3.) [a] School of Mechanical Engineering and Automation Wuhan Textile University Wuhan 430073 Hubei China [b] State Key Laboratory of Material Processing and Die and Mould technology Huazhong University of Science and Technology Wuhan 430074 Hubei China [c] wuhan zhike {2.-{3. Material science and technology development co ltd Wuhan 430073 Hubei China [d] college of science Wuhan University of Technology Wuhan 430079 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

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

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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 {2., Huazhong University of science and {2., wuhan 43.074, china 2. Institute of Laser {2. and Engineering, Huazhong University of science and {2., wuhan 43.074, china 3. Mechanical Engineering college, hubei University of {2., wuhan 43.068, china 1. School of Material science and technology Huazhong University of Science and Technology Wuhan 430074 China 3. Mechanical Engineering college Hubei University of Technology Wuhan 430068 China 2. Institute of Laser technology and Engineering Huazhong University of Science and Technology Wuhan 430074 China

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.

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

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Journal of wuhan University of technology(Materials {2.) 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

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广东深圳长圳公共租赁住房新型建造技术集成项目

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建筑实践 2024年第3期 104-111页

作者： china construction science {2. Group co., {3.. Shenzhen General Institute of Architectural Design and Research co., {3.. 中建科技集团有限公司深圳市建筑设计研究总院有限公司

长圳公共住房及其附属工程项目（以下简称长圳项目）位于深圳市光明区,是深圳市规模最大的装配式公共住房项目和深圳市建设管理模式改革创新的试点项目。项目总投资58亿元,地上建筑2.栋,总建筑面积约115万m2.其中:住宅建筑面积81万m2....

长圳公共住房及其附属工程项目（以下简称长圳项目）位于深圳市光明区,是深圳市规模最大的装配式公共住房项目和深圳市建设管理模式改革创新的试点项目。项目总投资58亿元,地上建筑2.栋,总建筑面积约115万m2.其中:住宅建筑面积81万m2.商业建筑6.5万m2.公共配套设施3.2.m2.多层建筑高度10—2.m,高层建筑高度100—150m,提供近万套人才安居住房。

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Early Age compressive Strength of Pastes by Electrical Resistivity Method and Maturity Method

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Journal of wuhan University of technology(Materials {2.) 2011年第5期26卷 983-989页

作者：肖莲珍 School of Materials science and Engineering Wuhan Institute of Technology

The compressive strength development of Portland cement pastes was investigated by the electrical resistivity method and the maturity *** experiments were carried out on the cement pastes with different water-cement ratios at different curing *** results show that the application of the maturity method has limitation to obtain the *** is found that both of the compressive strength and the electrical resistivity follow hyperbolic trend for all the *** hyperbolic equation of each mix is obtained to estimate the ultimate resistivity value which can probably be *** relationship between electrical resistivity and compressive strength of the cement pastes is established based on the test results and interpreted by the empirical Archie equation and a strength-porosity *** relationship between the electrical resistivity after temperature correction and the compressive strength was linear and independent of curing temperature and water-cement ratio.

关键词： electrical resistivity cement hydration compressive strength maturity method

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

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Journal of wuhan University of technology(Materials {2.) 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

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

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Journal of wuhan University of technology(Materials {2.) 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

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Surface Films Formed on SnO_2.Anode in Lithium Secondary Batteries by FTIR Spectroscopy

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Journal of wuhan University of technology(Materials {2.) 2008年第5期23卷 662-665页

作者：黄峰 hubei Refractories and High-temperature Ceramics Key Laboratory Wuhan University of Science and Technology

The chemical composition of the passivating layer formed on nano SnO2.anodes in 1 M LiClO4＋（ethylene carbonate）EC ＋（dimethyl carbonate）DMC at different charge/discharge states in lithium secondary batteries was studied using extra reflectance FTIR spectra. Results show that solvent decomposition reaction that generally occurs on the surface of carbon and alkali metal electrodes also takes place on nano-SnO2.anode, and the major constituent of the passivating layer is Li2.O3.and ROco2.i. Formation of the passivating layer would certainly lead to the irreversible capacity loss.

关键词： nano-SnO2.anode lithium rechargeable batteries FTIR passivating layer

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Influence of Mo content on Microstructure and Mechanical Properties of Fire-resistant construction Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 903-907页

作者： TONG Ming-wei 1,2.YUAN Ze-xi 1,ZHANG Kai-guang 2.RUI Xiao-long 2.(1.School of Materials and Metallurgy,wuhan University of science and {2.,wuhan 43.081,hubei,china 2.Research and development Center of wuhan Iron and Steel (Group) corp,wuhan 43.080,hubei,china) wuhan Univ Sci & Technol Sch Met & Mat Wuhan 430081 Hubei Peoples R China wuhan Iron & Steel Grp corp Ctr Res & Dev Wuhan 430080 Hubei Peoples R China

In order to ensure fire-resistant property of the steel under the condition of the least molybdenum content,effects of molybdenum on microstructure and properties of the fire-resistant construction steel,specially on high temperature strength were *** results show that the room temperature and high temperature strength of the steel is enhanced due to increased Mo content but the impact toughness deteriorates at the same *** fraction of bainite in the microstructure increases with increasing Mo content while the fractions of polygonal ferrite and pearlite *** with the steel of adding Nb alone,it was obvious that combined addition of Mo and Nb could provide better effect in high temperature *** of 0.2.mass% Mo in the steel containing Nb could meet fire-resistant requirements of the construction steel and provide better economical effectiveness.

关键词： fire-resistant construction steel high temperature strength microstructure precipitate molybdenum

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PEGylated PLGA Nanoparticles as Tumor Ecrosis Factor-α Receptor Blocking Peptide Carriers:Preparation,Characterization and Release in vitro

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Journal of wuhan University of technology(Materials {2.) 2007年第1期22卷 112-116页

作者：刘卫杨祥良 college of Life science and technology Huazhong University of Science and Technology

To assess the merits of PEGylated poly （lactic-co-glycolic acid）（PEG-PLGA） nanoparticles as drug carriers for tumor necrosis factor-α receptor blocking peptide （TNFR-BP）, PEG-PLGA copolymer, which could be used to prepare the stealth nanoparticles, was synthesized with methoxypolyethyleneglycol, DL-lactide and glycolide. The structure of PEG-PLGA was confirmed with ^1H-NMR and FT-IR spectroscopy, and the molecular weight （MW） was determined by gel permeation chromatography. Fluorescent FITC-TNFR- BP was chosen as model protein and encapsulated within PEG-PLGA nanoparticles using the double emulsion method. Atomic force microscopy and photon correlation spectroscopy were employed to characterize the stealth nanoparticles fabricated for morphology, size with polydispersity index and zeta potential. Encapsulation efficiency （EE） and the release of FITC-TNFR-BP in nanopartieles in vitro were measured by the fluorescence measurement. The stealth nanoparticles were found to have the mean diameter less than 2.0 nm and zeta potential less than -2. mV. In all nanoparticle formulations, more than 45% of EE were obtained. FITC-TNFR-BP release from the PEG-PLGA nanoparticles exhibited a biphasic pattern, initial burst release and consequently sustained release. The experimental results show that PEG-PLGA nanoparticles possess the potential to develop as drug carriers for controlled release applications of TNFR-BP.

关键词： tumor necrosis factor-α receptor blocking peptide PEG-PLGA stealth nanoparticles ring-opening polymerization controlled and sustained drug release

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