最新刊期
卷 36 ， 期 1 ， 2016
- 摘要：Mathematical and physical models of liquid metal cooling process were established to simulate the temperature field and microstructure.A simulation software with independent intellectual copyright was developed.The accuracy of the model developed were validated by the cooling curves and grain structure morphology.The micro-porosity in the castings based on the temperature filed was predicted to compare with experimental ones.The simulated results were well in agreement with the experimental ones.Combining with the grain etching for the casting and simulation results,the possible position for the stray grain has been analyzed.Then,some corresponding measures were presented.关键词：Directional Solidification;LMC;Mathematical and Physical Model;Numerical Simulation
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发布时间：2023-12-18 -
Effects of Low Voltage and Frequency Pulse Electric Current on Pure Aluminium Solidification Process
摘要：Industrial pure Al was treated by a self-developed low voltage and low frequency pulsed apparatus.The long columnar crystals which grows up from the outside to the inside in macrostructure with melt pulsed current treatment were broken off,and the peripheral coarse dendrite exhibits fine and short trend.With the increase of the pulse voltage,the area of equiaxed crystal is increased with the decrease of equiaxed crystal grain’s size to be stable.With increasing in duty,equiaxed area and grain size are increased firstly and then decreased,where with 60% duty,melting treating is desirable.Compared with those of the pure aluminum without pulsed treatment,the hardness,tensile strength,yield strength,elongation of pure aluminum with pulsed treatment are increased by 10%,13.9%,9.3%and 10.4%,respectively.The experimental results reveal that the super-cooled degree of liquid Al during solidification process is affected by pulsed current,leading to the fluctuation of grain refinement.This role is attributed to combined effect of various parameters,however it is not belong linear relationship.关键词：Pulse Current;Duty Cycle;Voltage;Super-cooling Degree- 2
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发布时间：2023-12-18 - 摘要：<正>来自全国中小企业股权转让系统（"新三板"）的消息,铝镁轻合金铸件生产商河南正旭科技股份有限公司正式在新三板挂牌公开转让,转让方式为协议转让。据悉,成立于2006年12月的正旭科技,是一家为航空航天等军工企业提供高精度、薄壁、复杂、轻质合金铸件及
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发布时间：2023-12-18 - 摘要：<正>广东鸿图科技股份有限公司（"广东鸿图"）发布公告称,该公司计划募资5.5亿元作为"汽车铝合金精密压铸件生产项目"等用途配股申请获得中国证监会审核通过。根据2015年上半年的公告,广东鸿图拟按照每10股配售不超过3股的比例向全体股东配售,配售股份不超过
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发布时间：2023-12-18 - 摘要：<正>2015年12月20日,黑龙江省鹤岗市萝北县在上海与宁海县富来压铸厂签订投资协议,后者计划投资5 000万元发展压铸锅炉项目。据介绍,位于浙江宁波市宁海下金工业园区的宁海县富来压铸厂,成立于1999年,占地面积11 000平方米,拥
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发布时间：2023-12-18 - 摘要：<正>2015年版《铅锌行业规范条件》颁布及实施,因严控以废料为原料冶炼锌的能耗、污染排放标准。2015年二季度开始,江浙一带以锌废料为原料的粗锌冶炼厂遭遇环保检查。2015年6月,50%左右厂家被迫减停厂。目前,部分厂家暂未听闻有复产迹象。
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发布时间：2023-12-18 - 摘要：<正>目前,江苏日和照明电器有限公司6 200万件照明灯罩压铸件项目、江苏明如精密模具有限公司1 000套压铸模具项目集中开工仪式,在项目所在地江苏省海门市海门港新区举行。
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发布时间：2023-12-18 - 摘要：<正>2015年12月初,安徽省含山县赴浙江温州市招商引资,期间与浙江大元泵业股份有限公司（"大元泵业"）就大元泵业的压铸子公司搬迁至含山工业园区铸造孵化园项目正式签约。根据协议,大元泵业将租赁含山工业园区铸造孵化园
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发布时间：2023-12-18 - 摘要：<正>2015年12月1011日,力劲集团与德国KUKA公司在上海联合举办了"2015力劲KUKA有色铸造业机器人应用研讨会"。此次会议以"合共赢、铸未来"为主题,切实研究和探讨力劲全自动压铸单元和KUKA机器人在压铸行业的应用。
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发布时间：2023-12-18 - 摘要：<正>日前,宁波旭升汽车技术股份有限公司（"旭升股份"）"年产810万套轻量化及环保型铝镁合金汽车零部件制造项目"通过该部门备案。据悉,该项目用地面积3.33万平方米,总投资4.9亿元,其中设备投资近3亿元。据悉,宁波旭升汽车技术股份有限公司"年增产1 000万件新能源汽车变速箱壳体等关键零部件生产线改造项目"已通过该局审批。
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发布时间：2023-12-18 - 摘要：Effects of W on microstructure and properties of wear-resistant coatings with W content from 0to 7.5 % prepared by argon arc cladding were analyzed by optical microscopy,hardness tester and wet sand rubber wheel tester.The results indicate that W has a obvious effect on microstructure and properties of coatings.With the increase of W content,the austenite gradually disappears while the content of primary carbide M23C6 is gradually increased.With increasing in W content,the macro-hardness is increased from 52 HRC to 62 HRC while the wear resistance is increased firstly and then decreased.When W content is 5%,wear resistance of the coating is 22.5times higher than that of substrate,which is attributed to M23C6 distributing uniformly in the coatings.关键词：Argon Arc Cladding;Microstructure;W Content;Wear Resistance
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发布时间：2023-12-18 - 摘要：The selective laser melting（SLM）experiments were conducted with Ni-Fe metal powder.Influences of different process parameters such as laser intensity,pulsed width,scanning velocity,laser frequency,spraying thickness and scanning spacing,have been investigated by the single-layer singlechannel scanning and single-layer multi-channel scanning experiments.Based on above results,optimized parameters have been adopted for multi-level multi-channel scanning process.By observing the block features,the influence of parameters on surface quality has been analyzed,and optimal process parameters were obtained for nickel-Fe metal powder.关键词：Selective Laser Melting（SLM）;Ni-Fe Metal Powder;Process Parameters
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发布时间：2023-12-18 - 摘要：For simulation of friction stir welded A356 aluminum alloy wheel rim,the coordinate transformation method about the moving coordinate system was used based on Fourier law to define the heat conduction governing equation containing the term of welding speed,which was introduced to reduce the modeling difficulty.Friction heat production used the shear friction model,according to the law of conservation of energy,the calculus equation considering the function conversion efficiency was used to deduce the reasonable heat production formula of the shoulder and stir tool,and according to the rim symmetric structure,calculation model was simplified,and heat transfer model of friction stir welding rim was established.The comparison of the rim weld profile morphology simulation under the condition of the same welding process with the experimental results verifies the effectiveness and accuracy of friction stir welding heat transfer model,which can be used to optimize the rim welding process parameters and to understand the welding mechanism of friction stir welded wheel rim.
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发布时间：2023-12-18 - 摘要：Based on analyzing the defects in cylinder head cover,Anycasting software was used to simulate casting process.It is found that the type and location of predicting defects are well in agreement with those of actual defects.In order to reduce or even eliminate defects,orthogonal experimental design was adopted to optimize casting process.The parameters of optimization process were presented for actual production of cylinder head cover,improving the qualified rate of head cover.关键词：Cylinder Head Cover;Die Casting;Simulation Analysis;Optimization
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发布时间：2023-12-18 - 摘要：The temperature field and flow field in low chromium white cast iron grinding ball in sand mold during solidification process were simulated by the InteCast software.The possible defect position in the100mm grinding ball was forecasted.The origination of shrinkage holes in the grinding ball was analyzed.The gating system was modified to optimize design by adding sand sleeves,shortening ingates and reducing the riser size as well as other methods.The temperature field of the gating system before and after optimization was simulated.The simulated results show that the optimized gating system can realize the sequential solidification,and shrinkage holes are transferred from the ball to the riser.The simulated results are consistent with the actual casting ones.关键词：InteCAST CAE;Numerical Simulation;Solidification Process;Temperature Field;Feeding
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发布时间：2023-12-18 - 摘要：The rheological behavior of semi-solid Sn-15 Pb alloy was analyzed by constant-velocity impression testing with 0.01,0.10 and 1.00mm/s at varied 198、193、188、183 ℃.The results reveal that with increasing in impression depth,impression force is increased to be constant.The calculation results reveal that apparent viscosity of Sn-15 Pb alloy is followed Ostwald power-law model and exponential relationship.关键词：Impression Test;Partially-solidified Alloy;Sn-15Pb Alloy;Rheological Behavior;Finite-ele ment Method
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发布时间：2023-12-18 - 摘要：Fabrication of semi-solid slurry of Al-23Si-4.4Fe-3Cu-1Mg alloy was carried out by rotatingrod induced nucleation（RRIN）.Effects of pouring temperature and rotating speed on the microstructure of semi-solid Al-23Si-4.4Fe-3Cu-1Mg aluminum alloy slurry were analyzed.The results indicate that with pouring temperature of 785 ℃ and rotating speed of 500r/min,the fine sized primary Si and Ferich phase can be observed with uniform distribution in the matrix.The equivalent diameter and shape factors of the primary Si particles and the Fe-rich phase can reach 35±2μm,50±2μm and 0.76,0.51,respectively.关键词：Rotating-rod Induced Nucleation（RRIN）;Primary Si Particles;Fe-enrichment Phase;Refine ment
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发布时间：2023-12-18 - 摘要：Semi-solid slurry of aluminium alloy A356 was prepared by self-inoculation method（SIM）.The difference of microstructure of alloy prepared by semi-solid metal casting and traditional permanent mold casting was analyzed comparatively,and effects of holding time and temperature on water-quenched microstructure of A356semi-solid slurry were described.The results indicate that the uniform primary particles with non-dendrite structure in A356 aluminium alloy can be observed by semi-solid rheological casting with SIM.The shape factor of primary particles reaches or nearby 1,and average grain size is relatively fine with the slurry isothermally holding for 3min.Therefore,an ideal rheological microstructure can be obtained with the slurry holding for 3 min.The solid fraction directly depends on pouring temperature,where at high solid fraction（more than 50%）,serious mergence of primary particles can result in the structure worse.On the contrary,it is hard to get ideal feeding effect during semi-solid processing at low solid fraction（less than 15%）.The suitable holding temperature of semi-solid treatment for aluminium alloy A356 is in range of 600 ℃610 ℃。关键词：A356Aluminium Alloy;Semi-solid;Self-inoculation Method;Shape Factor
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发布时间：2023-12-18 - 摘要：The semi-solid slurry of A319 aluminum alloy was prepared by internal cooling process.Effects of parameters,such as the mass ratio of internal cooling block to aluminum melt,the temperature of aluminum melt and the stirring speed,on the microstructure of semi-solid slurry were investigated.The forming mechanism of semi-solid slurry prepared by the internal cooling process was described.The results indicate that desirable globular primaryα-Al can be produced when the mass ratio of internal cooling block to aluminum melt is 5% with temperature of aluminum melt of 625 ℃ and stirring speed of1 100r/min,where the average diameter and shape factor of the primaryα-Al particles reach 59.7μm and 0.74,respectively.Roundness of the primary particles and grain refinement effects can be improved with the increase of stirring speed.关键词：Semi-solid;A319Alloy;Internal Cooling;Microstructure
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发布时间：2023-12-18 - 摘要：<正>奥斯陆2015年12月17日消息,全球重要铝生产商之一——挪威海德鲁公司（Norsk Hydro）主管对记者称,原铝价格下挫促使高成本生产商减产,或令2016年市场供需状况改善,并可能在2017年出现供应短缺。2011年以来,伦敦金属交易所（LME）3个月期铝价格
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发布时间：2023-12-18 - 摘要：3D molding for turbocharger shell was carried out by UG software and it was simplified at the same time.The Hypermesh software was employed to enmesh the model to get high quality mesh.The casting process of the turbocharger shell was simulated by Abaqus software to analyze deformation of shell mold during the casting process,and to predict the location and size of fin,which was compared with the actual production.Through collecting gap data of parting face in simulation,the mold was modified by compensating the gap date on mold,eliminating successfully fin defect on the turbocharge shell,which was verified by practical product.关键词：Turbocharger;Fin;Mold;Modification
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发布时间：2023-12-18 - 摘要：Through analyzing cylinder head cover structure,optimizing metallic mould design and ensuring the comprehensive quality of liquid aluminum alloy,the optimized pouring parameters were presented to produce low pressure casting cylinder head cover.Aiming at cylinder head cover structure,it is necessary to eliminate hot spot and convenient metallic mould as well as improving accuracy of metallic mould,keeping smoothly exhausting system to realize sequential solidification,besides of technical requirement such as drawing angle,wall thickness,round angle and enhancement rib.关键词：Cylinder Head;Low Pressure Die Casting;Product Structure;Mould
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发布时间：2023-12-18 - 摘要：Through optimizing vacuum die casting parameters,vacuum rate in mold cavity can be improved and porosity in castings can be decreased.Meanwhile,a method that can calculate theoretical pump-down time according to die casting parameters is presented.The error between theoretical and the actual pump-down time is less than 12%.With increasing in vacuum rate,the elongation of AZ91 Dalloy can be increased.With vacuum rate of 17.5kPa,the elongation of AZ91 Dalloy can increase by 70%compared with those of conventional die casting.After vacuum rate reaching 25 kPa,the increase of elongation is slow down.The range of vacuum rate from 25 kPa to 30 kPa exhibits high industrial application value.关键词：Vacuum Die Casting;Magnesium Alloy;Porosity;Mechanical Properties
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发布时间：2023-12-18 - 摘要：It is necessary to perform surface fine grain treatment on investment casting K417 Galloy low pressure turbine blade,however,excessive corrosion can be easily observed in the alloy during grain degree inspection.Effects of FeCl3,CuSO4 corrosion agent on surface and properties of the K417 Galloy blade were analyzed.The results reveal that with CuSO4 containing corrosion agent,carbide at grain boundary of the alloy can be flaked to lead to damage the grain boundary.Stress rupture testing at 950℃ and 235 MPa reveals that effects of corrosion on stress rupture of the alloy can be ignored for 5min,while it is deteriorated sharply for 20 min.With FeCl3 containing corrosion agent,the flake of carbide at grain boundary of the alloy blade is absent.The stress rupture testing at 950 ℃ and 235 MPa reveals that effects of corrosion on stress rupture of the alloy blade can be ignored for 5min and 20 min,while it is decreased greatly for 40 min,which is attributed to the increase of shrinkage porosity in dendrite of the alloy with increasing in corrosion time.The FeCl3 containing corrosion agent was adopted to inspect the grain degree of the turbine blade.关键词：Investment Casting;Grain Degree;Corrosion;Blade
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发布时间：2023-12-18 - 摘要：Cast copper rotor,which is produced with pure copper by die casting process,is the key component of higher efficiency motors.Cast copper rotor for motor is characterized by the high efficiency,small size and long operating life etc.,so the application of copper rotor in the motor has very important significance to improve energy utilization rate for the end user and to promote sustainable development and save energy costs.The advantages and disadvantages,the market situation,the development trends and research progress were presented about cast copper rotor motor.The cast copper rotor has wide market prospect in motor.关键词：Cast Copper Rotor;Motor;Development Trends
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发布时间：2023-12-18 - 摘要：Effects of austempering processing parameters on microstructure and properties of LFC-investment composite casting 1Cr17 steel landscape sprinklers were investigated by means of OM（optical microscopy）、TEM（transmission electron microscopy）、SEM（scanning electron microscopy）and tensile testing.The results show that microstructure of 1Cr17 steel consists of bainite,martensite and austenite.After austempering treatment,with the increase of time,bainite in the microstructure is increased,while residual austenite is decreased.The bending strength of the sample is increased slightly after quenching,and mechanical properties of sample exhibits desirable with quench for 4h.关键词：1Cr17Steel;Austempering;Microstructure;Bending Strength
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发布时间：2023-12-18 - 摘要：Through gravity casting and isothermal heat treatment combined with hot extrusion method,the Mg2Si/Al composites for aviation electron were prepared and investigated.Effects of different isothermal holding time and isothermal temperature on the microstructure and mechanical properties of the composites prepared were analyzed,and the mechanism was described.The results show that the Mg2Si phase is converted from small polygonal to spheroidiation or ellipsoid shape after isothermal heat treatment,and the degree of spheroidization is gradually increased with the isothermal time increase.The tensile strength and elongation of semi-solid squeezed Mg2Si/Al composites are superior to those of gravity casting Mg2Si/Al composite after different isothermal temperatures and time.The fracture of Mg2Si/Al composites is characterized mainly by matrix fracture,primary Mg2Si phase cracking and primary Mg2Si phase with matrix interface debonding.关键词：Aviation Electron;Mg2Si/Al;Isothermal Temperature;Holding Time;Microstructure
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发布时间：2023-12-18 - 摘要：The cast aluminum/graphite composites were prepared with Cu-coated graphite particles and rare element adding into the Al-Si alloy（ZL108）matrix through mechanical stirring method.The microstructure,hardness and wear behavior of the composites prepared with different Cu-coated graphite content were investigated.The results show that the dispersion of Cu-coated graphite is uniform when the Cu-coated graphite content is 2% 6%.The cast aluminum/4% Cu-coated graphite exhibits a higher hardness and better wear resistance.The dominated wear mechanism is changed from abrasive wear for the cast aluminum 0% Cu-coated graphite to delaminated mechanism for cast aluminum 4% Cu-coated graphite composites.关键词：Cast Aluminum/Graphite Composites;Cu-coated Graphite;Mechanical Stirring
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发布时间：2023-12-18 - 摘要：Carbon nanotube reinforced aluminum matrix composites were fabricated by powder metallurgy and hot extrusion method.The microstructure and wear surface of the composites prepared were observed by optical microscope and scanning electron microscope（SEM）,respectively.Wear behavior,hardness of the composites were investigated.Experimental results show that the hardness,frictional coefficient and ware rate of the composites are decreased,while the relative density is increased with the increase of CNTs content.The wear mechanism of the composites prepared are mainly characterized by adhesive wear and abrasive wear.关键词：Aluminum Matrix Nano-composites;Carbon Nanotubes;Friction and Wear
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发布时间：2023-12-18 - 摘要：The(Zr56Al16Co28)100-xYx（x=0,2,4）alloy samples were prepared by single roller melt spinning in high vacuum.Corrosion behavior of samples in chloride ion containing solution and effects of Y were investigated by X-ray diffraction（XRD）,electrochemical polarization curve,scanning electron microscope（SEM）.The results indicate that with the increase of Cl- in solution,corrosion rate of the ZrAl-Co-Y alloy is increased,and proper Y addition can improve the corrosion resistance of Zr-Al-Co-Y remarkably.关键词：Zr-based Amorphous;Cl-;Y;Corrosion Resistance
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发布时间：2023-12-18 - 摘要：The hot compression tests of spray-formed Al-9Mg-0.5Mn alloy was performed using thermal simulation tests in a Gleeble-3500 simulator.The effects of deformation temperature,strain and strain rate on dynamic recrystallization in spray-formed Al-9Mg-0.5Mn alloy were investigated.The results show that the working hardening plays a dominant role in the initial stage of deformation,and the flow stress is increased with increasing in strain.With increasing in strain,the main soft mechanism is characterized by dynamic recrystallization.The storage energy is increased with increasing in deformation temperature as a result of accelerating nucleation and growth of dynamic recrystallization.At a lower strain rate,there is enough time to grow for dynamic recrystallization core and substructure,which promotes dynamic recrystallization.So the microstructure of the alloy is completely recrystallized structure.关键词：Spray Forming;Al-9Mg-0.5Mn Alloy;Hot Compressing Deformation;Dynamic Recrystallization
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发布时间：2023-12-18 - 摘要：The microstructure and mechanical properties of as-cast Mg97Ni1Gd1Nd1 alloy were investigated using optical microscope（OM）,X-ray diffraction（XRD）,scanning electron microscope（SEM）and mechanical tests.The microstructure of as-cast Mg97Ni1Gd1Nd1 alloy is mainly composed ofα-Mg dendrites and interdendritic long period stacking ordered（LPSO）phases.The tensile yield strength,ultimate strength and elongation of the alloy reach 139 MPa,163 MPa and 1.7%,and 131 MPa,192 MPa and6.7%,at room temperature and at 300℃,respectively,showing an anomalous positive temperature dependence of the strength.The compressive yield strength,ultimate strength and plasticity of the alloy reach 159 MPa,364MPa and 14.9%,respectively,at room temperature,indicating a tension-compression asymmetry for as-cast Mg97Ni1Gd1Nd1 alloy.关键词：Magnesium Alloys;Mg-Ni-Gd-Nd;LPSO Phase
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发布时间：2023-12-18 - 摘要：Effects of surface high energy attrition treatment time on Al-Zn infiltration layer on AZ31 magnesium alloys were investigated by using high energy grinding machine.The surface and interface morphology of the coating were examined by scanner and scanning electron microscopy（SEM）.The infiltration layer was analyzed by means of X-Ray diffraction（XRD）and energy dispersion spectrometer（EDS）.The analysis of corrosion resistance on infiltration layer was carried out by potentiodynamic polarization curves.The results reveal that the thickness of infiltration layer is increased with the increase of mechanical attrition treatment time.Meanwhile,the corrosion resistance of AZ31 magnesium alloys is improved.关键词：Magnesium Alloy;High Energy Attrition;Infiltration Layer
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发布时间：2023-12-18 - 摘要：Aiming at existing deficiency of TA10 alloy ingot in the subsequent processing coil preparation in VAR,the volatilization mechanism of element in electron beam cold hearth melting was expounded.Single electron beam cold hearth melting technology of TA10 alloy was analyzed.The results show that the chemical compositions exhibit uniform in the TA10 alloy ingot by electron beam cold hearth melting with the homogeneous macrostructure,meeting the standards through the coil subsequent processing.关键词：Electron Beam Cold Hearth Metling;Single Melting;TA10Alloy;Hot Rolling
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发布时间：2023-12-18 - 摘要：Microstructure and properties of the Mg-7Al-1Si alloy with Gd addition or Gd-Ca compound addition were investigated by OM（optical microscopy）,SEM（scanning electron microscopy）,hardness testing and tensile testing.The results show that the matrix grain in the alloy can be refined,and theβ-Mg17Al12 phase becomes small and dispersed with Gd or Gd-Ca combined addition.After addition of Gd or Gd-Ca compound addition,creep strain of the alloy is decreased by 69.3%and by 80.7%,respectively.The high temperature creep properties of the alloys with Gd-Ca compound addition is superior to that of Gd alone.The friction and wear properties of the Mg-7Al-1Si alloy modified by Gd and Ca compound modifier can be improved effectively.关键词：Mg-Al-Si Alloy;Rare Earth Gd;Alkaline Earth Ca;Creep Property;Friction and Wears
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发布时间：2023-12-18 - 摘要：A molecular dynamics simulation model of aluminum with intersecting cracks was builted up.The crack propagation behaviors of intersecting cracks in aluminum were analyzed by using the embedded atom method and the rate loading molecular dynamics method.The atomic trajectories and energy evolution curves at different time were used to analyze the behaviors and evolution of the intersecting cracks.The results show that the increase of loading speed play apositive role in promoting the angle crack extension.With the angle of cracks increases,the angle crack is more difficult to expand and the extend path exhibits more complicated.关键词：Crack Propagation;Molecular Dynamics Simulation;Energy Evolution;Intersecting Cracks
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发布时间：2023-12-18 - 摘要：Superplastic tensile test of TB8 alloy was carried out with constant strain rate in the electronic universal tensile testing machine at 760880 ℃ and strain rate of 0.000 10.01s-1.Flow stress behavior was analyzed,and the superplastic tensile deformation activation energy and corresponding stress exponent were calculated.Stress-strain constitutive model of the TB8 titanium alloy was established.The results show that the flow stress is decreased with the increase of deformation temperature at a constant strain rate,while it is increased with the increase of strain rate at a constant deformation temperature.The maximum elongation of 356% can be obtained with the deformation at 840 ℃ and the strain rate at 10-4 s-1.The superplastic deformation activation energy and the corresponding stress exponent are 251.25kJ/mol and 2.389 5,respectively.关键词：TB8Alloy;Superplastic Deformation;Flow Stress;Constitutive Equation
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发布时间：2023-12-18 - 摘要：The creep behavior of Cu/Sn-0.7Cu/Cu solder joint was investigated at 100 ℃ with the shearing stress of 3.62 MPa,2.53 MPa and 1.78 MPa,respectively.The results show that all the strain-time creep curves of Cu/Sn-0.7Cu/Cu solder joint include three typical stages,primary creep,secondary creep（steady creep）and tertiary creep.In addition,with the decrease of shearing stress,the creep life is increased and the strain rate is decreased at the steady stage.The creep fracture mechanism is controlled by dislocation sliding and climbing at high stress,while the creep fracture mechanism is controlled by grain boundary sliding at low stress.Also,the fracture location is located in the center of the solder joint,and effects of interface IMC on the creep properties of the solder joint under the experimental condition can be ignored.关键词：Sn-0.7Cu Solder;Creep Life;Creep Stress;Fracture Morphology;Interface IMC
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发布时间：2023-12-18 - 摘要：The magnetic field of electromagnetic stirrer was simulated by the Maxwell 2Dsoftware.The results indicate that the magnetic field lines are distributed almost around the magnetic field generator windings,and the largest magnetic induction intensity can be observed.And the reasonable current frequency is 40 Hz.The electromagnetic stirring forming apparatus for the alloy was designed on the basis of the simulated results,and the microstructure and properties of manganese alloy were investigated.The results reveal that the electromagnetic stirring technique can improve the microstructure of manganese alloy.By observing crack number in the alloy at different cooling time and cooling rate,the microstructure and properties of the Mn alloy exhibit desirable with cooling at a third-quarter natural cooling time.关键词：Mn Alloy;Electromagnetic Stirring;Current Frequency;Cracking Temperature
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发布时间：2023-12-18
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