最新刊期
卷 33 ， 期 5 ， 2013
- 摘要：With the help of Matlab software,movement curves of cell wall with initial radius varying between 1 μm and 50 μm were simulated at different acoustic pressure,and the change of internal pressure in cavitation under some special situations was visualized also.Meanwhile,occurrence of enormous partial pressures of cavitation bubble near collapse points was presented.In addition,the larger bubbles’ movement at different acoustic pressures was simulated.The simulated results show that with the increase of acoustic pressure,the expansion of bubble is more and more obvious and the pressure in the cavitation bubbles is decreased.With increasing in the bubbles radius,the amplitude of the cavitation bubbles expansion is decreased.With the large acoustic pressure and the small initial radius,the bubbles exist in a short time,on the contrary,they can stay a long time,where sometimes the bubbles not collapse but pulsate in the time.At last,the experimental simulation in water was conducted.The results are well in agreement with the simulated ones.关键词：Cavitation Bubble;Cavities Wall’s Movement;Numerical Simulation;Internal Pressure
- 2
- |
- 256
- |
- 4
发布时间：2023-12-18 - 摘要：Rheo-squeezing casting thin-walled disc parts have been carried out in special mould.Semi-solid slurry was produced by low superheat pouring with a shear field（LSPSF）technology,and then rheo-squeeze casting semi-solid slurry prepared was carried out on the 2 000 kN vertical oil-pressing machine.Microstructure and properties of rheo-squeezed casting parts were investigated.The results indicate that the fine and non-dendritic grain in thin-walled parts can be observed by rheo-squeeze casting at a constant pressure of 25 MPa with the mould temperature of 200 ℃ and pouring temperature of 600620 ℃,and the average tensile strength elongation and maximum elongation reach 182.5 MPa,12.13% and 17%,respectively。
- 2
- |
- 148
- |
- 1
发布时间：2023-12-18 - 摘要：<正>现代交通惯用的内燃机,通常采用化石燃料与空气中的氧燃烧反应产生的化学能,转换成有用的动能和有害的温室气体排放。而目前相对流行和正在加速研发的绿色替代解决方案,主要为基于锂离子蓄电池电动汽车、氢燃料内燃机和加入部分可再生生物质混合燃料的发动机技术。但总体上,绿色替代技术仍然存在这
- 2
- |
- 29
- |
- 0
发布时间：2023-12-18 - 摘要：<正>美国加州大学洛杉矶分校亨利·萨穆埃利工程与应用科学学院的研究人员,成功研制出一种新的超级电容材料,并证明其能快速地存储和释放能量,有望广泛应用于城市电网、混合动力汽车的再生制动系统等能源传送系统。据了解,由布鲁斯·杜恩领导的科研团队合成出了一种氧化铌,并证明其拥有稳定的储能能力。这种新材料将
- 2
- |
- 79
- |
- 0
发布时间：2023-12-18 - 摘要：<正>澳大利亚科学家研制出一种由氧化钼晶体制成的新型二维纳米材料,有可能给电子工业带来革命,使"纳米"一词不再停留于营销概念而成为现实。科学家说,他们是从另一种奇妙的新材料——石墨烯得到启发的。石墨烯是单层碳原子网,是人类已知的最薄材料,电子在其中也能高速运动。但
- 2
- |
- 74
- |
- 0
发布时间：2023-12-18 - 摘要：<正>近日,新加坡南洋理工大学熊启华教授领导的科研小组首次证明:利用激光可使半导体的温度从室温冷却到零下20摄氏度。这一突破性的科研成果有望在电子和光电子器件上直接实现集成全固态、紧凑、无振动、无冷却剂的光学制冷器,相关元件可应用于航天器高灵敏探测器、红外夜视仪和电脑芯片等。相关论文发表在最近一期《自然》上。
- 2
- |
- 37
- |
- 0
发布时间：2023-12-18 - 摘要：<正>2013年3月1日起,欧盟旧版的镍释放标准EN1811:1998+A1:2008被新版标准EN1811:2011替代。1.新旧版标准的比对新版的标准较旧版的标准主要有以下不同:（1）范围扩大至所有与人体长期接触的物品,以及延伸至刺穿人体的部件;（2）测试溶剂的制备进行测试和有所改变;（3）校正因子0.1被弃用,引入了测试不准的概念,即在不确定的范围内无法断定合格与否;（4）添入了一个新的标准附录C;（5）新版标准EN1811:2011将太阳镜和眼镜框架排除在外,而太阳镜和眼镜框架的镍的释放测试使用EN16128:2011。
- 2
- |
- 54
- |
- 0
发布时间：2023-12-18 - 摘要：<正>据俄罗斯之声报道,日本可能撼动中国在稀土市场上的垄断地位。在日本专属区靠近太平洋南鸟岛附近,地质学家们发现了极为丰富的稀土矿藏,其储存量要比地球上发现的所有稀土矿藏量多出百倍。据悉,这些稀土矿藏仅在海底2到4米深处,尽管其总深度要达到5700米,但据东京大学教授加藤康弘介绍,开采的支出将
- 2
- |
- 41
- |
- 0
发布时间：2023-12-18 - 摘要：The surface residual stress relaxations of the shot-peened 7075 high-strength aluminum alloy specimens under thermal loading,force load and coupled thermal-force load were determined by X-ray diffraction technology.Moreover,mechanism and pattern of the stress relaxation under different thermal-force loading paths were discussed.The results show that different loading paths can cause equivalent residual stress relief by influencing the same microscopic dynamic and static mechanic characteristics.关键词：Shot Peening;Residual Stress;Stress Relaxation;Loading Path
- 2
- |
- 130
- |
- 2
发布时间：2023-12-18 - 摘要：Applying unified strength theory,two-layer prestressed combination die and the three-layer one by equal strength principle were analyzed,and series of calculation formula of the die strength containing the tension-compression ratio αand the intermediate principal stress parameter b were derived,and corresponding program was writed.By the program developed,three sets of curves about the die strength and R/r relation with different values of αand b were presented.Effects of the parameters αand b on combination die strength were obtained.The results show that die strength is increased with increasing in b changed from 0 to 1.As to alloy steel with significantly different tension and compression,when,α≠1strength of the combination die can be increased.关键词：Combined Extrusion Die;Separate Raidus;Shrink Range;Equal Strength Analysis
- 2
- |
- 129
- |
- 3
发布时间：2023-12-18 - 摘要：Effects of thixoforming parameters on microstructures and mechanical properties of thixoformed AZ63 Magnesium alloy were investigated.The results indicate that the primary particle size is decreased firstly and then increased,meanwhile,tensile strength and elongation are improved firstly and then decreased with increasing in partial remelting temperature under mould temperature of 200 ℃ and remelting time of 60 min.At remelting temperature of 600 ℃,with increasing in remelting time,size and roundness of primary phase are increased,resulting in the decrease of tensile strength and elongation.Grain size,roundness,tensile strength and elongation of the alloy reach 66 μm、1.3、247 MPa and 13.7%,respectively,at 600 ℃ for 60 min with mould temperature of 200 ℃.AZ63 magnesium alloy exhibits acceptable controllability during thixo-forming,and its properties are superior to those at as-cast one.关键词：Thixoforming Parameters;AZ63 Magnesium Alloy;Microstructure;Mechanical Properties
- 2
- |
- 131
- |
- 1
发布时间：2023-12-18 - 摘要：Effects of heat treatment on a new semi-solid forming hypereutectic Al-Si alloy were investigated.The theoretical solidus-liquidus phase of the alloy was presented through the Thermo-Calc software calculating the diagram of the alloy to guide the heat treatment process.The twelve processes were provided including four solution temperatures（480,500,520,540 ℃）and three aging temperatures（160,180,200）.Finally,a optimized heat treatment process was presented as follows:solid solution at 500 ℃ for two hours and then aging at 180 ℃ for eight hours.关键词：Hypereutectic Al-Si Alloy;Phase Diagram Calculation;Heat Treatment Process;Semi-Solid Process
- 2
- |
- 198
- |
- 2
发布时间：2023-12-18 - 摘要：The semi-solid TiB2/ZL203 composite feedstock was prepared by cooling slope process.The effects of pouring temperature and slope angle on solidification microstructure of semi-solid TiB2/ZL203 composites were investigated.The experimental results show that semi-solid TiB2/ZL203 composite slurry with fine and equiaxed or near-spherical α-Al phase can be obtained by cooling slope process.The average grain size and roundness of primary α-Al particles are decreased with the decrease of pouring temperature and increased with the increase of slope angle.However,with the slope angle more than 45°,the grain size and roundness are deteriorated slightly.The semi-solid feedstock with average diameter of about 42.8 μm and average shape factor of 0.52 of primary α-Al particles can be prepared under the pouring temperature of 700 ℃ and the slope angle of 45°,which is suitable for thixoforming.关键词：Cooling Slope Process;TiB2/ZL203 Composites;Semi-solid;Primary α-Al Particle
- 2
- |
- 133
- |
- 1
发布时间：2023-12-18 - 摘要：Research on high temperature titanium alloy is focused on the Ti-Al-Sn-Zr-Mo-Si near-α alloy,Ti-Al intermetallic alloys and titanium matrix composites.Ti-Al-Sn-Zr-Mo-Si near-α high temperature titanium alloy was reviewed including alloy of design principle,the main high temperature titanium alloy,600 high temperature titanium alloy characteristics,the microstructure and property of high temperature titanium alloy.关键词：High Temperature Titanium Alloy;Ti-Al-Sn-Zr-Mo-Si Titanium Alloy;Microsturcture and Properties
- 2
- |
- 540
- |
- 11
发布时间：2023-12-18 - 摘要：Continuous Cf/Al composites are becoming one of advanced composites of the most developing potential future.The near-net forming technology is the key technical bottleneck to be solved to realize the large-scale application of continuous Cf/Al composites.Low pressure infiltration preparing continuous Cf/Al composites is the most potential technology.However,the infiltration and material properties were greatly affected by the poor wettability between Cf and Al,high temperature oxidation and Cf with Al interface reactions.Fiber surface coated with SiC coating is an important way to solve the above problems.The advantages and disadvantages of different technologies of preparing SiC coating on the carbon fiber surface were described,and the future approaches of the preparation technology was presented.The influences of coating on the infiltration and properties of continuous Cf/Al composites were investigated.The existing problems and future tendency of SiC coating continuous Cf/Al composites were reviewed.关键词：Cf/Al Composites;Sic Coating;Preparation Technology;Property;Development Prospects
- 2
- |
- 343
- |
- 3
发布时间：2023-12-18 - 摘要：The die-casting technology of semi-solid rheological was developed.And the semi-solid die casting die for locking with different dimensions of ingates was designed.The filling and solidification process of semi-solid rheological die-casting was simulated by using Flow-3D software,and practical production was conducted to verify the simulated result.The result shows that during semi-solid rheological die-casting,the temperature of mold has greatly effects on die-casting,where the temperature of 250300 ℃ is a acceptable selection.Meanwhile,ingate dimension of die-casting mold is closely related to the quality of semi-solid die-casting product.The mechanical properties of the semi-solid rheological forming parts in condition of a larger ingate area are superior to those of one in a smaller ingate area.The optimized processing parameters are as follows:injection velocity of 1 m/s,mould pre-heating temperature of 240 ℃ and semi-solid slurry temperature of 590 ℃.关键词：Semi-solid;Aluminum Alloy;Numerical Simulation
- 2
- |
- 109
- |
- 1
发布时间：2023-12-18 - 摘要：Die casting process of a small aluminum alloy cover and its mould design were introduced.The locking-force of the mould was 1 150 kN.Aiming at the characteristics of small thin-walled die castings,bent pin for delay core pulling mechanism was adopted.Meanwhile,in designing die casting die,moving half and static half adopt the whole-insert,and exhausted-overflow system is set on the parting surface of static half.Push-rod pulling mechanism is designed.In addition,runner and ingate adopt flat lader-shape.Under the conditions of conventional parameters,the trial-mould was passed once.关键词：Die Casting Die;Bent Pin;Delay Core Pulling
- 2
- |
- 45
- |
- 0
发布时间：2023-12-18 - 摘要：<正>1内冷铁的使用（同材质）图1为某大支架铸件,其下部有一小钩,此处相对中间壁较厚,易出现缩孔、缩松[1,2],在此处应增设浇冒口,因零件尺寸较大,考虑到工艺出品率,采用了内冷铁[1],即在浇注之前在此部位插入一根同材质的钢棒,解决了此处的缩孔问题。具体做法是:在蜡模射制时冷铁芯头随同做出来（见图2）,制壳时每层抹掉泥芯头部的浮砂,露出冷铁
- 2
- |
- 142
- |
- 3
发布时间：2023-12-18 - 摘要：The casting defects and the structure as well properties of investment casting steel parts were investigated at different vibration conditions,and the casting defects,mechanical properties and microstructure of the casting were analyzed.The results show that proper vibration technology may not refine grain sizes and improve the mechanical properties,however it could effectively reduce casting slag holes and decrease the crack and the shrinkage porosity tendency as well as improving casting quality in the casting and solidification process.
- 2
- |
- 223
- |
- 11
发布时间：2023-12-18 - 摘要：The structure of DN100 wedge rigid-seal gate valve body with embedded stainless steel valve seat was introduced,and the production process of EPC was described.The microstructure of the jointed location of valve body with valve seat was observed.The results show that the valve body has the sound microstructure and quality.关键词：Rigid Seal Gate Valve;Embedded;Stainless Steel Valve Seat;EPC
- 2
- |
- 72
- |
- 1
发布时间：2023-12-18 - 摘要：<正>宜都市万鑫精密铸造有限公司投资3000万元,新建5800平方米的厂房及配套设施,购置设备23台套,生产线2条,可年热处理1.5万吨精密铸锻件。（湖北招标网报道）
- 2
- |
- 23
- |
- 0
发布时间：2023-12-18 - 摘要：<正>据了解,国土部今年要开展铁矿、铜矿、铅矿、锌矿、稀土矿、钾盐等大宗和战略矿种"三率"标准制定工作,作为资源合理利用的"红线"。国土资源部矿产资源储量司许大纯副司长称,今年要摸清全国矿产资源综合利用状况,完成重要矿产资源"三率"调查评价工作,完成数据建库,提
- 2
- |
- 43
- |
- 0
发布时间：2023-12-18 - 摘要：<正>2012年,中国铝业上市公司集体亏损,而原铝产量依然是有色金属品种中增长最快的品种。据国家统计局公布的数据,2012年全年我国累计原铝产量1988.3万吨,同比增长13.2%。工信部数据显示:2012年末国内电解铝产能为2765万吨,产能利用率仅为72%。产业集中度低、产品同质化严重,企业只能靠拼产量来摊低成本,进一步加剧了产能过剩和无序竞争的恶性循环。未来铝业的产能必须减少,但减少的将首先是落后产能。
- 2
- |
- 61
- |
- 0
发布时间：2023-12-18 - 摘要：<正>2013年3月28日下午,中共中央政治局常委、国务院副总理张高丽,中共中央政治局委员、北京市委书记郭金龙一行到中关村国家自主创新示范区展示中心观看展示。张高丽副总理重点视察了未来制造业和信息产业等展厅。在未来制造业展厅,郑州机械研究所所长、先进成形技术与装备
- 2
- |
- 42
- |
- 0
发布时间：2023-12-18 - 摘要：AZ31 magnesium alloy bars with φ10 mm in diameters were prepared by vacuum horizontal continuous casting（VHCC）with a multi-mold composed of heated graphite mold and water cooling copper mold.Through comparing with master magnesium alloys prepared by metal mold casting,the microstructure and mechanical properties of the AZ31 bars prepared were investigated.The results show that the microstructure of VHCC AZ31 magnesium alloy consists of fine equiaxed grains with the size reduced from 300 μm to 35 μm,therefore the alloy prepared exhibits desirable comprehensive mechanical properties.The tensile strength and elongation are increased by 37.6% and by 112.5%,respectively.The tensile fractures of the AZ31 magnesium alloy,in which cleavage facets become fewer and smaller while dimples and tear edges connecting together into river-like patterns become more,apparently presenting characteristics of quasi cleavage.关键词：AZ31 Mg Alloy;Horizontal Continuous Casting;Microstructure;Mechanical Properties;Fractures Behavior
- 4
- |
- 157
- |
- 1
发布时间：2023-12-18 - 摘要：Fault of CEFI medium frequency induction heating furnace in producing aluminum alloy wire-rod on continuous-properzi continuous casting-rolling line was analyzed.During producing six series aluminum alloy wire-rod,induction heating furnace exists in some problems including frequent trip and silicon controllable breakdown when induction heating furnace preheats the billet,leading to a serious safety problems.Through analyzing the fault mechanism of induction heating furnace,the structure of the furnace was modified,avoiding the frequent trip and silicon controllable breakdown,realizing the accuracy and stable operation as well as ensuring the quenching effects of wire-rod.The aluminum alloy wire-rod exhibits acceptable strength and plasticity after ageing treatment.关键词：Trip;Breakdown;Insulation;Quality
- 2
- |
- 70
- |
- 0
发布时间：2023-12-18 - 摘要：The injection filling process of LFC with different position of bead inlets was simulated by the DEM model,in which the Euler-Lagrange divorced particle model was established.Flow kinetic characteristics of densified gas-solid phase of foamed beads during filling process was investigated by the numerical simulation.The movement of foamed beads is closely related with gas-phase pressure distribution.The inner-outer pressure difference formed near venting plug during filling process drives the bead movement.At fixed other conditions,injection filling process of foamed beads was simulated with different positions of bead inlets.The results reveal that the bead inlets should be set at a wider location of cavity to reduce the hinder near beads inlets and movement direction of beads as possible to realize the smooth flow.关键词：Lost Foam Casting;Filling Process;Venting Plug;Numerical Simulation
- 4
- |
- 69
- |
- 1
发布时间：2023-12-18 - 摘要：During developing engineering database for foundry CAE,dynamic data binding and DLL were considered emphatically.Meanwhile,query function based on different requirements was designed to realize the management of various processing parameters from data modular in foundry CAE system effectively and scientifically.Furthermore,the simulated precision and operating velocity of the system were increased to improve the availability.关键词：Database;ADO.NET;DLL;Dynamic Binding;Query
- 2
- |
- 79
- |
- 3
发布时间：2023-12-18 - 摘要：Influences of thermal exposure time on the microstructure and properties of Cr-9Nb alloy with exposure in vacuum condition at 800 ℃ were investigated.The results show that the microstructure of the alloy is coarsened to some extent with the increase of thermal exposure.Relative density is increased slightly in the first 50 h and then tended to be stable.Change of Vickers hardness can be ignored in a whole time and fracture toughness is decreased to 6.02 MPa·m1/2 after 100 h thermal exposure.The yield strength,compressive strength and plastic strain are increased to a peak value in initial 10 h,and then declined.Besides,the plastic strain is decreased obviously from 18.3% to 10.3% after 100 h thermal exposure.In addition,alloy still keep a high yield strength of 1 536 MPa and compressive strength of 2 203 MPa.关键词：Thermal Exposure;Laves Phase;Cr-9Nb Alloy;Microstructure and Properties
- 2
- |
- 85
- |
- 1
发布时间：2023-12-18 - 摘要：The surface treatment of the carbon fiber before plating and the processing parameters of electroless plating surface were investigated,and the morphology and composition of copper-coated carbon fibers were observed by SEM（scanning electron microscopy）and XRD（X-ray diffraction）.The short carbon fiber reinforced copper matrix composites were prepared by powder metallurgy.The influences of the short carbon fiber volume fraction on the density,hardness and electrical conductivity of the composites prepared were analyzed.The results show that the satisfied degumming process of carbon fiber can be obtained with burning at 380 ℃ for 30 min.Compared with ultrasonic dispersion or magnetical stirring,electric stirring exhibits the better effects in the dispersity of short carbon fiber,which can realize the uniform dense electroless deposition.With the increase of the short carbon fiber volume fraction,the density and electrical conductivity of the composites are decreased,and the hardness of the composites is increased at first and then decreased.With the content of copper-coated carbon fibers of 12.5 %,the hardness of the composites prepared reaches up to the maximum value.The physical properties of copper based composites with the copper-coated carbon fibers are superior to that of ones without copper-coated carbon fibers.关键词：Short Carbon Fiber;Copper Matrix Composite;Electroless Copper Plating;Electrical Conductivity;Hardness;Density
- 2
- |
- 205
- |
- 4
发布时间：2023-12-18 - 摘要：The steel-based surface composites were fabricated with the carbon steel ZG310-570 being selected as matrix and high carbon ferrochrome as cast-penetrated agent by conventional cast-infiltrating process combined with the thermite reaction.Influences of aluminum content in thermite reaction on the microstructures,thickness and properties of cast-infiltration layer were investigated.The results show that the interfacial bonding exhibits metallurgical fusion between cast-infiltration layer and the matrix,and the cast-infiltration composites mainly consist of M7C3,Cr7C3 and Al2O3 phase in the cast-infiltration layer containing aluminum powder,and the thickness and wear resistance of the composite layer are increased with the increase of aluminum content when the aluminum content is less than 2%,the pouring temperature is 1 650 ℃,and the preforms（thickness 10 mm）are embedded in the middle-bottom location of the mold wall.The cast-infiltration layer containing 2%Al exhibits desirable properties,where the thickness reaches to 15 mm,and the wear resistance is approximately 6.65 times higher than that of the matrix.关键词：Cast-Infiltration;Thermite Reaction;Aluminum Content;Thickness;Wear Resistance
- 2
- |
- 137
- |
- 2
发布时间：2023-12-18 - 摘要：We have developed an atomizing device to prepare Cu-Ag alloy particles by adjusting the main atomizing parameters.With the help of body phase microscope and XRD（X-ray diffraction）,the morphology and phase of atomizing particles were observed and tested to understand effects of the main atomizing parameters on particle size and morphology.The results show that atomizing particles exhibit mainly spherical or near-spherical structure.Ag has preferably dissolved into Cu and not separated into the single phase.The suitable atomizing parameters for preparing Cu-Ag alloy particles with 150900 μm were presented as follows:package leakage aperture of 3.64.1 μm,pouring temperature of 1 5781 591 ℃ and atomizing pressure of 3.03.4 MPa.关键词：Atomizing Device;Cu-Ag Alloy;Spray Parameters;Particle Morphology
- 2
- |
- 103
- |
- 3
发布时间：2023-12-18 - 摘要：Microstructure and properties of Cu-0.8Cr-0.1Zr alloy under different processing and heat treatment were investigated,and the optimized processing parameters were presented through comparing the properties and structure.The results show that Cu-0.8Cr-0.1Zr alloy exhibits good performance after hot extrusion deformation and solution treatment at 980 ℃ for 40 min+aging at 460 ℃ for 3 h,and micro-hardness and electrical conductivity reach HV0.2131,49.01 MS/m,respectively.关键词：Cu-0.8Cr-0.1Zr Alloys;Solid Solution;Aging;Micro-Hardness;Electrical Conductivity
- 2
- |
- 94
- |
- 1
发布时间：2023-12-18 - 摘要：The corrosion behaviors of Al-7Si cast alloys in 3.5% NaCl aqueous solution were examined by using electrochemical corrosion and immersion corrosion tests.Influence of manganese（Mn）and tin（Sn）on the Tafel curves and electrochemical parameters,such as free corrosion potential and corrosion current densities,of Al-7Si alloys were investigated.Moreover,the weight loss and morphology of the alloys after immersion corrosion were measured and analyzed by analytical balance and scanning electron microscopy（SEM）.The results indicate that all the tested alloys can be passivated rapidly,and their corrosion potential is drifted to negative,meanwhile,their corrosion current density and corrosion weight loss are increased with the addition of alloy elements Mn and Sn,greatly deteriorating the corrosion resistance of the alloy.In addition,the corrosion morphology and corrosion mechanism of Al-7Si cast alloys were described.关键词：Al-Si Cast Alloy;Corrosion Resistance;Electrochemistry Test;Immersion Corrosion
- 2
- |
- 95
- |
- 0
发布时间：2023-12-18 - 摘要：Effects of pulsed magnetic field on as-cast microstructures and mechanical properties of Mg-Gd-Zn and Mg-Gd-Zn-Zr alloy were investigated by optical microscope（OM）,X-ray diffraction（XRD）,scanning electron microscopy（SEM）,hardness testing and compressive testing machine.The results show that the morphology of the primary phase is converted into spherical or rossetes crystal with the pulsed magnetic field of 10 Hz,obtaining the most desirable refinement effect.With the vibration frequency of 10 Hz,the Vickers hardness,elongation,yield strength and compressive strength of Mg-2Gd-1Zn alloys and Mg-2Gd-1Zn-0.18Zr alloy reach to maximum value of 83 Hv、13.8%、129 MPa、326 MPa and 87 Hv、15%、174 MPa、405 MPa,respectively.关键词：Pulsed Magnetic Field;Vibration Frequency;Mg-Gd-Zn-Zr Alloy;Microstructure
- 2
- |
- 229
- |
- 7
发布时间：2023-12-18 - 摘要：Effects of mixed rare earth La and Ce modification on microstructure of the recycled ADC12 alloy were observed with the different mixed rare earth addition by OM（optical microscope）and XRD（X-ray diffraction）and DSC.The modification effects and mechanism of the mixed RE on the recycled ADC12 alloy were described.The results indicate that the rare earth modification can greatly drop the porosity and size of α-Al as well as silicon phase in the recycled ADC12 alloy.With the addition of 0.3%,the average SDAS（secondary dendritic arm space）and average size of eutectic Si phase are reduced to only 17.9 μm and to 12.4 μm,respectively,exhibiting the desirable modification effects.关键词：RE;Recycled Aluminum;ADC12 Alloy;Microstructure
- 2
- |
- 243
- |
- 1
发布时间：2023-12-18 - 摘要：Influences of the heat treatment（solution treatment plus aging treatment）times on the microstructure and mechanical properties of ZL105A alloy were investigated.The results show that with twice heat treatment,the alloy ZL105A exhibits the desirable microstructure and mechanical properties.With three times heat treatment,elongation of the alloy is decreased,and with four times heat treatment,metallographic structure is coarsened seriously,and the mechanical properties of the alloy are weakened sharply as a result of the coarseness of the grain size in the microstructure.关键词：Heat Treatment Times;Microstructure;Mechanical Property;Elongation
- 2
- |
- 228
- |
- 2
发布时间：2023-12-18
- Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
0