最新刊期
卷 36 ， 期 6 ， 2016
- 摘要：Effects of electromagnetic stirring（EMS）on the solidification structure and segregation of Incoloy825 superalloy billet were investigated.The results reveal that the EMS can refine the macrostructure and increase the ratio of equiaxed grain in Incoloy825 superalloy billet.With the increaseg of EMS current from 150 Ato 300A,the average grain size can be refined from 300μm to 210μm,and the ratio of equiaxed grain is increased from 66.7% to 77.5%.Absence of EMS,the macrosegregation and microsegration exhibit more serious,and with EMS,the forced convection caused by EMS can improve the heat transfer and solute transfer,decreasing the secondary dendrite arm spacing as a result of the cooling rate increase,which homogenizes the distribution of the solute.The EMS can inhibit effectively the macrosegregation and microsegregation of Incoloy825 superalloy billet.关键词：Incoloy825 Superalloy;Electromagnetic Stirring;Solidificaiton;Segregation
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发布时间：2023-12-18 - 摘要：To better understand the internal electromagnetic field distribution in cold crucible on melting and solidifying glass,the ANSYS software was used to establish 3D model for small electromagnetic cold crucible for glass solidification,and the electromagnetic field in cold crucible was calculated.By the comparison of different paths,electric current,frequency of the magnetic field distribution inside the cold crucible,and actual measurement values were used to validated.The results show that the maximum magnetic field intensity in the central position of no-load condition can be obserbed and it is decreased gradually to two side with height difference.The magnetic field intensity is enhanced as the current increased from 500 Ato 1 500 A,while it decreases with the frequency increasing from 50 kHz to200kHz.关键词：Cold Crucible;Glass Solidification;Electromagnetic Field;Numerical Calculation
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发布时间：2023-12-18 - 摘要：AlxCoCuFeNi high-entropy alloys were designed and prepared to analyze microstructures and mechanical properties.The results reveal that with a relatively lower Al addition（x < 0.85）,a simple FCC crystal structure is only observed.With increasing in x,the crystal structure is transformed to a mixed structure of BCC and a small amount of FCC.A single BCC structure can be observed with x more than 2.35.It is also found that Cu element promotes the formation of the FCC structure while Cr element favors for the formation of the BCC structure.When Cu and Cr with equal molar ratio are contained in the high entropy alloys,Cu can play a more important role than Cr in selection of the solidification structure.The microstructure of as-cast alloys is varied from columnar dendrite to equiaxed dendritic morphology,so hardness of the as-cast alloys is increased with increasing in Al content.关键词：High Entropy Alloy;Aluminium Content;Crystal Structure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：<正>广东铭利达科技有限公司二期项目铝合金压铸件生产及配套项目（"广东铭利达铝压铸件项目"）,在东莞清溪镇举行奠基仪式。据悉,广东铭利达铝合金压铸件项目位于东莞市清溪镇罗马村,总用地面积约83亩,计划总投资约6.2亿元,分两期投资建设。其中,一期占地44 808.78平方米,二期占地10 653.72平方米。该项目是铝合金、锌合金、镁合金压铸件,铝型材及五
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发布时间：2023-12-18 - 摘要：<正>近日,伊之密DM2500压铸机成功入驻客户无锡朗贤汽车组件研发中心有限公司（"无锡朗贤"）,接下来将在现场进行机器组装和调试。无锡朗贤专注于汽车轻量化技术,从各种来料及零件性能的热成形模具,到不同零件强度的液压成形模具,从快速软模到量产硬模,均有几十项技术专利储备。主要客户
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发布时间：2023-12-18 - 摘要：<正>广东文灿压铸股份有限公司（"文灿股份"）拟将全资子公司天津雄邦压铸有限公司（"天津雄邦"）注册资本增加到2亿元,即天津雄邦压铸有限公司新增注册资本1亿元,其中公司认缴出资1亿元。广东文灿表示,公司本次对子公司增资是为子公司战略发展提供支持,有利于促进公司的发展,实现公司的战略规划,对公司未来业绩和收入产生积极影响。据悉,天津雄邦成立于2015年1月,天津生产基地亦
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发布时间：2023-12-18 - 摘要：<正>"中国废铝的回收周期已经到来,预计2017年前,中国废铝的产生量将以10%的速度增加,2017年以后将是废铝产生量加速的过程,每年增幅将达到15%甚至更多。"保定隆达铝业有限公司副总裁郭军辉日前在出席英国商品研究所（CRU）主办的"2016年世界铝业大会"时如是表示。郭军辉介绍,2000年是中国汽车黄金年,按照汽车1015年
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发布时间：2023-12-18 - 摘要：<正>由华中科技大学完成的"大型金属零件高效激光选区熔化增材制造关键技术与装备（俗称激光3D打印技术）"最近通过了湖北省科技厅成果鉴定。该成果深度融合了信息技术和制造技术等特征的激光3D打印技术,体积为（500×500×530）mm3,由4台激光器同时扫描,为目前世界上效率和尺寸最大的高精度金属零件激光3D打印装备。该装备攻克了多重技术难题,解决
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发布时间：2023-12-18 - 摘要：<正>5月8日上午,由五龙电动车（集团）有限公司投资的纯电动汽车项目签约仪式,在贵州省贵阳市贵安新区举行。项目预计2018年投产,建成年产15万辆电动车生产能力。五龙电动车项目,位于贵安新区高端装备制造产业园北部园区,新能源工厂占地约1300亩,预计总投资约50亿元,工厂计划2017年年底前竣工,并同步实现首台车下线。
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发布时间：2023-12-18 - 摘要：<正>汽车工业协会2016年5月发布数据,今年前4月我国新能源汽车生产、销售分别实现9.4万辆和9万辆,较去年同期分别增长126.8%和131.1%。前四月,新能源汽车生产94 442辆,销售90 529辆,比上年同期分别增长126.8%和131.1%,其中纯电动汽车产销分别完成70 552辆和66 444辆,比上年同期分别增长165.3%和171.2%;插电式混合动力汽车产销分别完成23 890辆和24 085辆,比上年同期分别增长58.8%和
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发布时间：2023-12-18 - 摘要：<正>浙江万丰奥威汽轮股份有限公司（"万丰奥威"）发布公告,其全资公司万丰镁瑞丁控股有限公司（"万丰镁瑞丁"）拟在浙江新昌设立全资子公司,并投资年产70万套仪表盘骨架和1 000万套转向管柱项目。据介绍,万丰镁瑞丁将在绍兴新昌设立万丰镁瑞丁新材料科技有限公司,注册资本1 800万美元,主营汽车和摩托车镁合金铸件、镁合金汽车零部件。该项目总投资为
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发布时间：2023-12-18 - 摘要：<正>2016年5月13日,国家智能制造装备发展专项项目——"4 000t高效智能压铸岛及其生产管理信息化系统"智能制造专项验收会在江苏徐州徐航科技有限公司召开,项目顺利通过验收。该项目由力劲科技集团牵头发起,组建了以力劲科技集团为核心的国内一流研究团队。其中机科发展科技股份有限公司拥有机械工程、机械与自动化、数字化工厂等多个
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发布时间：2023-12-18 - 摘要：<正>日前,广东省质监局正式批复,同意肇庆市质计所筹建"广东省质量监督铝合金压铸产品检验站（肇庆）"。近年来,随着佛山铝型材产业快速发展,佛山用地、环保等要求越来越严格,当地政府已开始限制此类污染企业的发展,再加上企业自身发展,不少佛山铝材加工企业开始了迁移和
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发布时间：2023-12-18 - 摘要：<正>来自江淮汽车集团的消息,近日,由江淮汽车技术中心车身设计研究院承担的国家重点项目--"复杂薄壁压铸铝合金零部件成形与应用关键共性技术",通过国家科技部专家评审,申报成功。据了解,项目将通过5年时间突破行业内的大型复杂薄壁件的制备工艺难度,研发的铝合金减
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发布时间：2023-12-18 - 摘要：In using asynchronous hotwire cutting with EPS foam,traditional 2DCAD methods were restricted due to that the shape of 3Dmodels couldn’t be depicted precisely by the curves,resulting in the deviation of design and real product.In order to overcome the problem,a control system based on Open GL and Microsoft Visual Studio software was developed,which could run 3Dsimulation and manufacture.With the help of the system,analysis of the process can be performed prior to manufacturing.Thus material can be used efficiently and efficiency can be enhanced.Finally,the experiment of processing the foam mould was completed with the new system.关键词：EPS Pattern;Asynchronous Hotwire Cutting;Open GL Simulation
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发布时间：2023-12-18 - 摘要：Failure behavior of semi-autogenous mill liner was analyzed under V-Ti-magnetite wet grinding conditions.Through the optical microscope（OM）,scanning electron microscope（SEM）,energy dispersive spectroscopy（EDS）,hardness tester and other materials testing instruments,the microstructures of failure liner were investigated,and the corrosive wear mechanism of liner material under weak alkaline conditions was expounded.The results show that the surface of liner is mainly characterized by cutting furrow,corrosion pits and cracks.The interaction of low surface hardness,weak hardening effect and corrosion-wear of liner material are responsible for failure of liner.关键词：Liner;Weak Alkaline;Corrosive-wear
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发布时间：2023-12-18 - 摘要：A multi-objective optimization method of MIG electric arc welding process parameters for aluminum alloy 6005 Asheet was presented based on orthogonal test and grey correlation analysis.The multi-objective parameter optimization problem was transformed into the optimization of the grey correlation degree of a single target based on the experimental data.The problem of insufficient test data was solved,and the optimization process was simplified,meanwhile,the accuracy of the decision was improved.Experiments verified the validity of the method.关键词：Aluminum Alloy;Welding;Process Parameters;Grey Correlation;Optimization
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发布时间：2023-12-18 - 摘要：The effects of Er addition on microstructure and corrosion resistance of AM50 alloy for automobile engine were investigated by optical microscopy and tensile testing.The results show that the Er alloyed AM50 alloy is composed ofα-Mg,β-Mg17Al12,Al7ErMn5 and Al3Er phase.With the increase of Er addition,the corrosion rate of the alloy is decreased firstly and then increased.The corrosion rate and corrosion morphology reveal that the AM50 alloy exhibits the desirable corrosion resistance with 0.5%Er addition.With the increase of Er addition in AM50 alloy,the corrosion residual strength is increased firstly and then decreased,and the satisfied corrosion residual strength can be observed with 0.5%Er addition.关键词：AM50Alloy;Er;Corrosion Rate;Corrosion Residual Strength
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发布时间：2023-12-18 - 摘要：Melt refinement treatment（or external field treatment）is one of the important categories of metal-melt treatment technology.It is applied for semi solid or liquidus rheoforming to achieve entire homogenization and refinement of the casting structure.Based on cost and performance,three principles for evaluation of the external field technologies were presented as follows:simple process,uniform refinement and low defect.Through objective evaluation of the existing external field technologies,a novel rotary shearing dispersing technology（RSD）which similar to soymilk-maker is feasible in generous commercial applications.关键词：Melt Treatment;Microstructure Homogenization;Grain Refinement;External Field Treatment;Semi Solid;Slurry Preparation
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发布时间：2023-12-18 - 摘要：With the help of ProCAST software,solidification simulation of the initial casting process of the housing for GIS was conducted to understand origination of defects occurred.Then the initial casting process was optimized with the help of computer simulation technology.The results demonstrate that isolated liquid region occurrs in the solidification process of the large flange surface with 25 mm thickness of cold iron,resulting in shrinkage defects.After process optimization,through setting 15 mm thick cold iron on the large flange surface and avoiding the gate locations as well as the inner circumference of chill keeping a distance of 10 mm with the cylinder wall,the solidification process can meet the sequential solidification,so shrinkage defects are eliminated.The simulation results were validated,and the simulation results were well agreement with the actual production ones.关键词：GIS;Housing;ProCAST Software;Solidification Simulation;Process Optimization
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发布时间：2023-12-18 - 摘要：In order to improve the market competition,more and more foundry enterprises begin to introduce the ERP system which can control effectively the manufacturing process.However,most of these enterprises have implemented the financial supply chain system,thus,how to realize the dual system integration has become a problem to be solved in the informationization process of casting enterprise.Given the business and data heterogeneity between different ERP systems,it is extremely difficult to integrate the dual system.A feasibility development on the integration of the manufacturing system and financial supply chain system in the foundry enterprise was carried out.First,business integration program and data interface specification of the two systems integration were analyzed,then risk assessment was conducted,and measures to avoid these risks were presented.Finally,based on the demand of integrating HZ ERP and UFIDA U9 in a foundry enterprise,a specific scheme of business and data integration was designed,which could be referenced by the foundry enterprise to implement dual system.关键词：Dual System Integration;ERP;Feasibility;Foundry Enterprise
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发布时间：2023-12-18 - 摘要：Al-7.2Zn-2.2Mg-1.8Cu-0.2Zr alloy and Al-7.2Zn-2.2Mg-1.8Cu-0.2Sc-0.2Zr alloy were prepared by resistance furnace.The two alloy samples were produced by squeeze casting at 700720 ℃,which was treated at 465 ℃×24+475 ℃×8hsolid solution,water quenching +120 ℃×24haging.The results show that through the addition of trace element Sc and Zr,theα-Al phase and the second phase intercrystalline in the Al-Zn-Mg-Cu alloys are refined effectively.Through the multi-stage solid solution and aging treatment,the mechanical properties of alloy are improved significantly,where the tensile strength,yield strength and elongation of the samples reach up to 613 MPa,528 MPa,6%,respectively.关键词：Al-Zn-Mg-Cu Alloy;Sc;Squeeze Casting;Microstructure and Properties
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发布时间：2023-12-18 - 摘要：Three kinds of process properties,such as filling ability,sensibility of cracking and feeding ability,were presented in view of the familiar defects in squeeze casting process or molten metal die forging process（MMDF,for short）.Moreover,their characterization parameters were defined quantificationally as maximum filling length,staying time in molds and effective feeding length,respectively.Some experiment methods and equipment were suggested to experimentally determine their values.It was pointed out that those process properties were controlled mainly by the alloy properties,die types and the forge processing parameters.关键词：Squeeze Casting;Processing Properties;Characterization Parameter
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发布时间：2023-12-18 - 摘要：According to the structural characteristics of pump body parts,the gating system,exhaustingoverflow system and die-casting process parameters were designed.Filling and solidification process was carried out with the ProCAST software.According to the simulation results,the casing process was optimized,and the reasonable die-casting process parameters were determined.With casting temperature of 630 ℃ and the mold preheating temperature of 220 ℃ as well as the injection rate of 1.5 m/s,the qualified pump body was produced,which showed that the simulation results could be used in the actual production.关键词：Aluminum Alloy;Pump Body;Numerical Simulation;Process Design
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发布时间：2023-12-18 - 摘要：The effects of machinery vibration on the solidification and feeding of ZL205 A alloy in low pressure casting were investigated by applying horizontal vibration on the low pressure casting mold.The results reveal that vibration can improve effectively the efficiency of the casting feeding.With the increase of amplitude,the distribution of shrinkage is reduced,and with the increase of the frequency,the distribution of shrinkage is decreased also.关键词：Vibration;ZL205A Alloys;Low Pressure Casting;Solidification;Feeding
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发布时间：2023-12-18 - 摘要：To solve the problem of shrinkage porosity formed in the hot spot in the process of low pressure casting large aluminum alloy wheel,the methods of changing mold temperature and thickness of mould to eliminate defects were put forward,however,the improvement of isolated molten pool can be ignored.Therefore,on the basis of the above two optimization methods,water cooling tube was set on the corresponding defect position at the die.The results show that the method not only realize wheel sequential solidification to eliminate the defect at the wheel thickness,but also improve the cooling speed of wheel.关键词：Low Pressure Die Casting;Temperature Field;Numerical Simulation;Water Cooling
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发布时间：2023-12-18 - 摘要：Filling and solidification as well as defect distribution of a aluminum alloy die casting structure parts were analyzed by the numerical simulation.The gating-exhausting system for the structure parts was optimized.Based on the self-developed high vacuum die casting technology,effects of vacuum degree in filling process on microstructure and mechanical properties of the structure parts were investigated.The results reveal that high pressure die casting can reduce greatly the gas content in the structure and improve the relative density of the parts.Compared with those of the conventional vacuum die casting,tensile strength,yield strength,elongation and hardness of the structure parts are increased by21%,29%,18%,10%,respectively.关键词：Structure Parts;High Vacuum Die Casting;Numerical Simulation;Mechanical Properties
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发布时间：2023-12-18 - 摘要：Vacuum HPDC samples were treated by two groups of T5 treatment such as 500 ℃×0.5h +150 ℃×5hand 500 ℃×2h + 150 ℃×5h.Effects of T5 treatment on mechanical properties of vacuum die casting samples were analyzed by comparing with those of as-cast samples.The results reveal that tensile strength of the samples with 500℃×0.5h+150℃×5htreatment has the maximum value.Meanwhile,the stability of tensile strength and elongation of the samples exhibit desirable.The effect of micro-gas hole on mechanical properties of the samples is increased with solution treat time increase.关键词：Vacuum HPDC;T5-treatment;Mechanical Properties
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发布时间：2023-12-18 - 摘要：<正>2016年5月17日,德国知名工业级3D打印机厂商Voxeljet在第14届中国国际铸造博览会上宣布与中国知名3D打印服务商上海美唐科技旗下的苏州美迈快速制造技术公司合资成立维捷中国（Voxeljet China）,经过几个月的筹备工作,维捷（苏州）三维打印有限公司已于5月1日开始正式投入运营。
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发布时间：2023-12-18 - 摘要：The large ball valve has complex structure with non-uniform wall thickness and isolated hot spots,so partial shrinkage porosity is always generated in the investment casting,decreasing the qualified rate of ball valve.The gating system was redesigned based on ProCAST software analyzing original system.Chills were also introduced through special method to realize sequential solidification from bottom to up,so the shrinkage porosity in the isolated hot spot of the ball valve was eliminated successfully,improving effectively qualified rate.关键词：Ball Valve;Investment Casting;ProCAST;Optimization
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发布时间：2023-12-18 - 摘要：Large size hollow thin-walled K424 alloy X-type pulling rod front end with blind tube was produced by investment casting.There exist some problems in trial-production,such as crack and demoulding of ceramic cores,contract control of the castings and melting quality.Aiming at the problems mentioned above,some measures,such as contraction design,wax pattern preparation,gating system design and processing optimization,were presented.Through improving measures,the qualified castings were produced successfully,meeting the design and use requirement.关键词：K424Alloy;Thin-walled Tube;Investment Casting
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发布时间：2023-12-18 - 摘要：According to the Reynolds discrimination and experimental data,the gas flow in vacuum pipes of V-Process casting is judged to be turbulent,and formula of the main pipe area was derived.The gas flow in vacuum pipes was simulated by the software.The results reveal that the diameter of main pipe in the pumps can change the co-action among pumps,and the bending joint can eliminate effectively the gas vortex at the joint.关键词：V-process Casting;Vacuum System;Pipes Design
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发布时间：2023-12-18 - 摘要：The effects of ultrasonic power,ultrasonic treatment time and temperature on properties of insitu Mg2Si/AZ91 composites were investigated,and orthogonal experiment was designed to optimize process.The results reveal that ultrasonic treatment can refine obviously as-cast microstructure of the composites,and the morphology of primary Mg2 Si phases is converted from chunk to fine particle,and a little eutecticβ-Mg17 Al12 phase is precipitated with dis-continuous net-like structure.The tensile strength and elongation of the composite exhibit desirable when the ultrasonic treatment temperature is690 ℃and ultrasonic power is 700 Was well as ultrasonic treatment for 65 s.The tensile strength is increased from 167 MPa to 209 MPa,and the elongation is increased form 1.8%to 3.3% after ultrasonic treatment,increased by 25% and 89%,respectively.关键词：Ultrasonic Treatment;Mg2Si/AZ91 Composites;Orthogonal Experiment
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发布时间：2023-12-18 - 摘要：On the basis of analyzing diffusion bonding process of the stainless steel and copper alloy,the diffusion brazing behavior of Cu-Zr and Ni-based superalloy was analyzing,focusing on the microstructure and mechanical properties of brazing joint.The results reveal that diffusion brazing joints have desirable interface and compact structure as well as satisfied mechanical properties with welding at 880900 ℃for 90120min,realizing the excellent bonding.关键词：Zirconium Copper;Nickel-based Superalloy;Diffusion Brazing;Microstructure
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发布时间：2023-12-18 - 摘要：2% short carbon fiber with a length of 2mm and 3mm reinforced 2024 Al contained Sc matrix composites were fabricated by liquid stirring casting method.The micro-yield behaviors of the composites treated with various aging process were measured by load-unload method.The results reveal that the micro-yield strength of the short carbon fiber reinforced 2024 matrix composites exhibits the same aging hardening charateristics as the macroscopic strength.The composites treated with peak aging process have the highest micro-yield strength.The strain-hardening rate of the materials is the greater than macroscopic yield and always increased firstly and then decreased during micro yield.The materials strengthened with 3mm carbon fiber exhibit the higher micro-yield strength than that of ones reinforced with 2mm carbon fiber.关键词：Aluminum Matrix Composites;Micro-yield;Carbon Fiber Length;Aging Process
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发布时间：2023-12-18 - 摘要：Tungsten oxide nanowires were prepared by solvothermal method with the WCl6 as the precursor,the ethanol as the solvent and PVP as the surface activity agent.The nanowires were characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy and high-resolution transmission electron microscopy and selected area electron diffraction.Tungsten oxide morphologies were modified through changing the PVP addition.The growth mechanism of tungsten oxide nanowires and the morphology changed were analyzed.关键词：Tungsten Oxide;Solvothermal;Morphology
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发布时间：2023-12-18 - 摘要：The surface of GH141 superalloy was processed by laser shock processing（LSP）,and residual stress distribution was tested with X-ray diffraction（XRD）before and after the impact treatment,meanwhile,the fatigue crack was observed.Experiment results show that the residual tensile stress of GH141 superalloy reaches up to 200 MPa before impact treatment.After a LSP,residual stress is converted to compressive stress with fluctuations in-400 MPa and hardness is increased by 20%25%.By comparing the fatigue crack before and after LSP,it is found that the fatigue crack is reduced significantly after LSP,which shows that the technique can reduce effectively the fatigue crack initiation,and improve the fatigue life.关键词：Superalloy;Laser Shock Processing;Residual Stress;Fatigue Crack
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发布时间：2023-12-18 - 摘要：Casting solidification process of metal mold casting aluminum alloy conductive rod was simulated to understand the casting defects resulted from unrational structure design and to analyze quantitatively the defect distribution.Through optimizing processing parameters,the qualified aluminum alloy conductive rod was produced by permanent mold casting.关键词：Aluminum Alloy;Conductive Rod;Structure Optimization;Solidification Simulation
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发布时间：2023-12-18 - 摘要：The casting-forging integrated technology was used to prepare AZ91 D magnesium alloy.The effects of forging deformation rate on microstructure and mechanical properties of AZ91 Dmagnesium alloy were investigated.The results show that,with the increase of forging deformation rate,the forced feeding effect on the solidification alloys in die cavity is enhanced,and the shrinkage cracks and shrinkages in AZ91 D magnesium alloy are decreased,and the ultimate tensile strength and the elongation of AZ91 D magnesium alloy are increased.When the forging deformation rate reaches more than 2mm,the shrinkage cracks and shrinkages in AZ91 D magnesium alloy can be eliminated.When the forging deformation rate reaches 5mm,the ultimate tensile strength and the elongation of AZ91 Dmagnesium alloy are 240.3 MPa and 4.14%,which are improved by 34.7% and 52.7%,respectively,compared with those of AZ91 D magnesium alloy without forging.关键词：AZ91D Magnesium Alloy;Casting-forging Integrated Forming;Forging Deformation Rate;Shrinkage Crack
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发布时间：2023-12-18 - 摘要：Pulsed magnetic field（PMF）was introduced to treat melt during solidification of Mg93Zn6Y1 alloy.Effects of discharging voltage on microstructure and mechanical properties of Mg93Zn6Y1 alloy were investigated.The results show that the primaryα-Mg and quasicrystal icosahedral phase（I-phase）in the alloy can be refined by PMF treatment.With increasing in discharging voltage,the primaryα-Mg and I-phase are further refined.With discharging voltage of 300 V,the morphology of primaryα-Mg is transformed from the developed dendrite to fine rosette and particle,and I-phase is converted from coarse continuous net-like structure into discontinuous structure or particle.At the same time,the average width and average area ratio of I-phase are reduced from 26μm and 32%to 10μm and 14%,respectively.The tensile strength and elongation of Mg93Zn6Y1 alloy treated by PMF with 300 Vreach 172.1MPa and 1.6%,respectively,which are increased by 71.2% and 60.0%,respectively,compared with those of the alloy without PMF treatment.关键词：Pulsed Magnetic Field;Mg93Zn6Y1 Alloy;Discharging Voltage;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The effects of part substitution of Zr by Yb（Yb=0,0.01%,0.02%,0.03%,and 0.04%）on the mechanical and electrical conductive properties of Al-0.2Sc-0.04（Zr,Yb）alloys were investigated.It is found that with only 0.01% and 0.02% Yb substituted for Zr,Al-0.2Sc-0.04（Zr,Yb）alloys exhibit an apparent ageing-hardening peak.The optimum ageing temperature is around 330℃.For the alloys partially substituted by 0.01% and 0.02% Yb,the corresponding yield stresses reaches 188.1and177.5 MPa,while the tensile strength is 212.9and 207.3 MPa,respectively.Excessive substitution of Zr by Yb,the decrease of mechanical properties can be observed.The results show that the electrical conductivity of the alloy can further improved by cold rolling.Al-0.2Sc-0.04（Zr,Yb）alloys with the desirable comprehensive properties can be obtained by the part substitution of Zr by 0.02% Yb.关键词：Al-Sc-Zr-Yb Alloys;Hot Extrusion;Cold Rolling;Mechanical Properties;Electrical Conductivities
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发布时间：2023-12-18 - 摘要：The corrosion behavior of 6063 alloy with different aged treatment was investigated by hardness test,intergranular corrosion test,total immersion corrosion test and electrochemical corrosion test,meanwhile,the corrosive mechanism was analyzed.The results show that with increasing in aging temperature,the time of intergranular corrosion and homogeneous intergranular corrosion are shortened,and the maximum corrosion depth is decreased.The dynamic potential polarization of the 6063 alloy at different aging treatment is accordant with the intergranular corrosion test,total immersion corrosion test,where the corrosion resistance of the alloy is gradually decreased from under-aging,peak aging to over aging.关键词：6063Alloy;Aging;Intergranular Corrosion;Full Immersion Corrosion;Polarization Curve
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发布时间：2023-12-18 - 摘要：The erosion-corrosion behavior of B10 pipes with20mm and38mm in diameter was tested on self-made pipe-testing machine in 3.0m/s of artificial seawater.The corrosion rate change of the alloyed pipe with different diameters was analyzed at artificial seawater with the same flow rate as the erosion time increases.The results indicate that at the fixed flow rate of artificial seawater,the corrosion rate of copper-nickel alloy pipe is decreased gradually to be stable with erosion time increase.With the flow rate of 3.0m/s,the corrosion rate of the pipe with diameter of 38 mm is the higher than that of one with diameter of 20 mm.The pipe with diameter of 38 mm can generate a more complete passivation film after erosion 48 h,and the pipe with diameter of 20 mm can form a passivation film after erosion 96 h.关键词：B10Copper-Nickel Alloy Pipe;Corrosion Rate;Corrosion Weight Loss;Electrochemical Impedance
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发布时间：2023-12-18
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