最新刊期
卷 35 ， 期 1 ， 2015
- 摘要：The microstructure and mechanical properties of 7475-T7351 aluminum alloy sheet with 25 mm in thickness at different orientations were investigated by tensile testing,metallographic（OM）,transmission electron microscopy（TEM）and orientation distribution functions（ODF）analysis.And the relationship between texture and planar anisotropy was analyzed quantitatively.The results show that the longitudinal yield strength,tensile strength and elongation of the sheet reach 501 MPa,428 MPa and8.4%,respectively.And the lateral yield strength,tensile strength and elongation reach 491 MPa,416 MPa and 8.9%,respectively.The longitudinal strengths（yield strength and tensile strength）of the sheet are about 10 MPa higher than the lateral strengths of specimens,and the longitudinal and lateral elongation of the sheet exhibits ignore difference,indicating that the alloy sheet belongs to anisotropic.The major texture of 7475-T7351 aluminum alloy sheet is copper texture{112}<111>,Stexture{123}<634> and Brass texture {110}<112>,and the volume fraction of those texture in the alloy is19.95%,16.67%,12.06%,respectively.Moreover,there exists relatively weak cube texture{001}<100>,which is formed during recrystallization process,and the volume fraction is about 4.58%.By the calculation of the Schmid factor,it reveals that the anisotropy of mechanical properties of the sheet at different orientations is closely related with the texture in the alloy.关键词：7475-T7351Aluminum Alloy;Mechanical Properties;Microstructure;Orientation Distribu-tion Functions;Texture
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发布时间：2023-12-18 - 摘要：A new melt processing technology of spiral annular electromagnetic stirring（SA-EMS）was developed for understanding effects on solidification behavior of 7075 aluminium alloy,and effects of stirring current and pouring temperature on microstructures were analyzed.The SA-EMS process innovatively combined non-contact electromagnetic stirring and a spiral annular chamber with specially designed profiles to in-situ make high quality melt slurry,and intensive forced shearing could be achieved under high shears rate and high intensity of turbulence inside the spiral annular chamber.The temperature field,component field and tiny heterogeneous particles are distributed uniformly in the melt.The results indicate that the SA-EMS melt processing technology exhibits desirable grain refinement effects.With the increase of stirring current,the primaryα-Al particles are refined with more spherical.However,with the stirring current of 30 A,the change of solidification structure can be ignored.With the increaseof pouring temperature,the morphology of the primaryα-Al particle by SA-EMS is coarsened from globular to rosette-like and finally to dendritic.However,compared with conventional casting,importance of pouring temperature is weakened.关键词：7075Aluminum Alloy;Spiral Annular Electromagnetic Stirring;Microstructures
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发布时间：2023-12-18 - 摘要：By means of orthogonal test,optical microscope（OM）,transmission electron microscopy（TEM）,energy dispersive spectrometer（EDS）,X-ray diffraction（XRD）,tensile test and conductivity test,effects of aging temperature and holding time on the microstructure and mechanical properties of extruded Al-Mg-Si alloy were investigated.The results show that aging treatment can lead to the precipitation of the dispersive Mg2 Si phase,improving mechanical properties and electrical conductivity of the alloy.Effect of aging temperature is dominant in mechanical properties of the extruded alloy,and low temperature with long time aging treatment is in favor of alloy with acceptable comprehensive properties.After aging at 190 ℃for 8h,the tensile strength of alloy wire reaches 224.3 MPa,and the conductivity reaches above 36.06 MS/m.关键词：Aging Treatment;Al-Mg-Si Alloy;Extrusion Process;Tensile Strength
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发布时间：2023-12-18 - 摘要：Effects of solid solution treatment with different cooling Ways on the microstructure and mechanical properties of a cast nickel-based alloy under the condition of VIM（vacuum induction melting）were investigated.The results reveal that with solid solution treatment at 1 210 ℃for 4hin non-vacuum heat treatment furnace and air cooling as well as spraying 1309 Dcoating on the bar,the size ofγ′phase in dendritie with the higher unifromity and 73.3%volume fraction is finer than that in as cast alloy.In addiiton,with solid solution at 1 210 ℃for 4hin non-vacuum heat treatment furnace,γ′phase particles in dendrite exhibits cubic morphology with distributed more uniformly,andγ′phase fraction reaches 74.2%,and mechanical properties are satisfied.With solid solution at 1 210 ℃for 4hours under vacuum condiiton,γ′phase particles are coarsened to spheroidization,deteriorating the mechanical properties of the alloy.关键词：Ni-Cr-W-Co Alloy;Solution Heat Treatment;Cooling Method;Microstructure;Mechanical Prop-erties
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发布时间：2023-12-18 - 摘要：In order to improve the brittleness of Fe-24 Al alloy,rare earth elements La was added,and the different solid solution methods were performed to the alloy contained La.And the relationship between microstructures of as-cast,solid solution treatment state and mechanical properties of the alloy was investigated by metallographic,micro-hardness measurement,compression performance measurement and XRD.The results show that the grain size is significantly refined by adding rare earth element La,and the hardness and compressive strength are decreased with the ductility significant increase.After solid solution treatment,the grain size in microstructure of Fe-24 Al and Fe-24Al-La alloy is decreased slightly.The XRD results show that the Fe-24Al-La alloy mainly consists ofα-Fe,FeAl phase,Fe3 Al phase,and a new phase of Fe4Al8 La appears in the alloy after solid solution treatment at 825 ℃ and 850 ℃.The maximum compressive strength of the Fe-24Al-La alloy reaches 1 250 MPa.Compared with Fe-24 Al alloy,the ductility has significantly increased,and the best ductility is obtained with solid solution treatment at 825 ℃ and 850 ℃,where compression curve exhibits smooth with absence of crack point.
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发布时间：2023-12-18 - 摘要：A kind of Al-Mg-Si alloy contained Zr and Er element for sheet was prepared.The alloy composition is Al-0.8Mg-1.0Si-0.8Cu-0.2Mn-0.15Zr-0.3Er.As-cast and homogenized microstructure of the alloy prepared was observed by transmission electron microscope（TEM）,X-ray diffraction（XRD）,scanning electron microscope（SEM）,energy dispersive spectrum（EDS）and optical microscope（OM）.Meanwhile,the types and changes of precipitation phase in as-cast and homogenization state were analyzed.The results indicate that with Er and Zr addition in casting ingot,the equiaxed grain in the alloy prepared can be observed,and the second phases mainly existing in casting alloy include Mg2Si、Al1.9CuMg4.1Si3.3、CuAl2、Al4Mn3Si2、primary Al3Er、Al3Zr andβ-Si.After homogenization treatment,the second phase particles are distributed more uniformly,improving microstructure of the alloy,and Mg2Si、Al1.9CuMg4.1Si3.3and CuAl2 phases are fully dissolved into the alloy during homogenizing treatment.There are coherent Al3 Er particles precipitate from supersaturated Er solution,and the Al3（Er,Zr）composite phase with a core-shell structure is formed.关键词：Al-Mg-Si Alloy;Homogenization;Microstructure
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发布时间：2023-12-18 - 摘要：By MAGMA software,filling and solidification of the gravity casting engine case cover were simulated.The gating system was analyzed and optimized to improve the flow line defect.The results show that the composition distribution in the alloys at solidification front exhibits heterogeneous due to thin wall of the casting,resulting in the flow line defects.Through setting insulting riser at location where the defect appears,flow line defect can be eliminated effectively.关键词：Flow Line Defect;Numerical Simulation;Magma;Gravity Casting
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发布时间：2023-12-18 - 摘要：Thermal deformation behavior of austenite 40 Cr steel was analyzed by numerical simulation.Constitutive relation curve was drawn by JMatPro software,and dynamic recrystallization model was established.Compressive process of 40 Cr steel at high temperature was simulated by recrystallization model combining with cellular automaton model on Deform-3Dplatform.The results show that the average grain size of 40 Cr steel is decreased with the increase of compression deformation rate,and with true strain of 1,the grain size in severe deformation area reaches 10.1μm,and the error is within range of±10% compared with relevant experiment.Cellular automaton simulation can visualize the dynamic recrystallization process.The prediction results are well in agreement with experimental ones.关键词：40Cr;Dynamic Recrystallization;JMatPro Software Simulation;Microstructure Simulation.
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发布时间：2023-12-18 - 摘要：3-D geometry entity of motorcycle aluminum alloy wheel was modeled by CATIA.The wheel rotating bending fatigue strength was estimated by the ANSYS software,and the structural optimization was conducted.The results show that,after structural optimization,the safety coefficient of fatigue strength design is reduced from 1.61 to 1.33,and the fatigue life of wheel is reduced from 3.1million times to 0.75 million cycles with the weight of the optimized wheel decreased by 6%,realizing the purpose of weight reduction.关键词：Aluminum Wheel;Bend;Structure Optimization;Fatigue Life
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发布时间：2023-12-18 - 摘要：Copper stave was produced by graphite mold-sand mold casting.By MAGMA software,the solidification process of copper stave was simulated,including modeling,grid meshment,parameters select and simulated result analysis.The results reveal that,the solidification of copper stave follow the rule from the runner to the riser,and the sand side（upper surface）play a role in feeding graphite side（lower surface）.Thereby the copper stave has sound structure with absence of remarkable casting defects,meeting the design requirements.With pouring temperature at 1 1501 200 ℃,a desirable metallurgical bond of embedded copper pipe with body can be observed.关键词：Copper Stave;Numerical Simulation;Sequential Solidification;Metallurgical Bond
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发布时间：2023-12-18 - 摘要：By using the Magma software,the gating system for the aluminum oil pump was validated and optimized.In addition,solidification field was compared at different cooling parameter conditions.The simulation results reveal that the shrinkage porosity defects located in the part can be predicted accurately.After adjusting the cooling parameters,the simulated results reveal that the shrinkage porosity（holes）defects can be eliminated remarkably.The practical production is well agreement with simulated ones.关键词：Magma Software;Aluminum;Process Validation;Optimization
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发布时间：2023-12-18 - 摘要：The semi-solid slurry of a novel Mg-6Zn-3RE-1.4Yalloy was prepared by ultrasonic vibration（USV）.Then the slurry was formed by direct squeeze casting（SC）.The microstructure and phase constitutent of Mg-6Zn-3RE-1.4Yalloy produced by rheo-squeeze casting were investigated.The results show that there exist two-type fine and spherical particles（α1-Mg andα2-Mg）different in size.The average diameter and shape coefficient ofα1-Mg particles reach 22μm and 0.74,respectively,andα2-Mg grains are mainly spherical and fine particles formed from the remaining liquid of the slurry.The phase constitutent of the alloy are mainly not onlyα-Mg matrix、α-Zr but also Mg12Ce、Mg12La and I-Mg3Zn6 Y which distributed along the crystal interface.关键词：Rheo-squeeze Casting;Ultrasonic Vibration;Mg-6Zn-3RE-1.4YAlloy;Microstructure
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发布时间：2023-12-18 - 摘要：The semi-solid slurry of 6061 wrought aluminium was prepared by self-inoculation method.Effects of pouring temperature on the semi-solid slurry by self-inoculation method were investigated.The results indicate that the dendrite in the microstructure are gradually reduced,or even disappear with the decrease of pouring temperature,meanwhile,lots of uniform and fine near,spherical crystal or rossette-shaped crystal can be observed.The desirable temperature process window for 6061 wrought aluminium alloy is in range of 710℃ 730℃,and the average grain size is 32.3μm 36.2μm.Compared with the traditional casting,self-inoculation method can obtain semi-solid slurry with uniform and fine microstructure.关键词：Semi-solid Slurry;Self-inoculation;Pouring Temperature;Wrought Aluminium
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发布时间：2023-12-18 - 摘要：The semi-solid slurry of A380 aluminum alloy was prepared through a serpentine pouring channel,and influences of pouring temperature,the curve numbers and the curve diameters in a serpentine channel on microstructure of the alloy slurry were investigated.The experimental results show that the satisfactory semi-solid A380 aluminum alloy slurry can be obtained with the pouring temperature at 610℃ 650 ℃.The microstructure of the semi-solid A380 alloy slurry can be evolved from rossette to spherical particle.At a given pouring temperature,the particle size of primaryα-Al can be decreased and the shape factor of primaryα-Al is increased with the increases of the curve number or decrease of the diameter of the curve,at the same time,the microstructure of semi-solid A380 alloy slurry can be optimized.关键词：Semi-Solid Slurry;A380Alloy;Serpentine Channel;Primaryα-Al
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发布时间：2023-12-18 - 摘要：A coupled thermo-mechanical simulation of three-dimensional squeeze casting components has been conducted by using ANSYS software according to the basic principle and characteristics of the squeezing casting.Some factors influencing simulation were taken into account,such as effect of volume shrinkage due to cooling and solidification,the mechanical behavior of materials under evaluated temperatures,the characteristics of latent heat release,and the mutual dependence of interfacial heat transfer and casting deformation in the simulation.A step-shaped trial-part was simulated,which demonstrated the ability of the method to simulate the pressure transmit and fading inside the castings.Finally,the method was applied to simulate the solidification of an automotive subframe component,and the squeeze casting process of the component was optimized based on the simulated results.关键词：Squeeze Casting;Thermo-mechanical Coupled Simulation;Subframe Component
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发布时间：2023-12-18 - 摘要：A new design and application of automatic trimming die for automobile engine cylinder block was introduced.Trimming die integrates with electricity,gas,water,oil channel and with three surface composite cutting including up,left,right face to ensure removal of all scraps once.Trimming die associates with automatic feeding trimming press combined with extracting and inserting mechanical hand,infrared ray induction,transferring mechanical hand and dais of move-dumpage,delivery,removal and shedding of scraps can be achieved on the automation line.Compared with the traditional removal of die casting scraps process,the occupancy rate of production space was reduced,and the pollution and working intensity were decreased,playing the role in shortening production period.关键词：Automobile Engine Cylinder Block;Automatic Trimming Die;Shedding of Scraps
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发布时间：2023-12-18 - 摘要：The actual defect analysis of aluminum alloy die casting lower case was conducted.The origination of defects was described by MAGMASOFT to simulate the filling process.Then design and optimization of the gating system were conducted based on the MAGMASOFT simulation.The results show that the quality of die casting lower case is improved after using the optimized design.The die casting lower case meets the requirements of product technology,shortening trial-die time.关键词：Aluminum Alloy;Die Casting;MAGMASOFT;Gating System;Optimization
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发布时间：2023-12-18 - 摘要：Combined with titanium investment casting in actual operating conditions,the temperature field in the process of titanium casting in a vacuum,enclosing,centrifugal and high temperature environment was measured by the thermo-coupler and data analysis.A series of relevant data in titanium investment casting process was presented,such as pouring temperature,cooling speed and filling time of the liquid metal,the heat loss when the molten metal poured into the gating system.With the help of the research result,reliable information can be provided for the design of the gating system.The data and method can be applied in the numerical simulations to get a more accurate result or applied in the further theoretical analysis of the titanium alloy.关键词：Titanium Alloy;Investment Casting;Temperature Field;Production Environment
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发布时间：2023-12-18 - 摘要：The forming technology of cartridge receiver gas chamber was explored.The cartridge receiver gas chamber was formed with the help of ceramic core.A series of new process of ceramic core moulding and using were investigatewd.The structure of ceramic core was designed reasonably,and the feasible process and parameters were determined.The cartridge receiver was produced sucessfully with meeting requirement of gas chamber size and surface quality.关键词：Ceramic Core;Investment Casting;Gas Chamber;Cartridge Receiver
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发布时间：2023-12-18 - 摘要：The formation mechanism of inclusion in aluminum bronze castings was described,and its origination was expounded,meanwhile,the key control point for the design of gating system,alloy melting and pouring was introduced.Through adopting gating system with serpentine channel and bottom pouring as well as side-pouring of runner,inclusion and slag defects were reduced significantly,greatly improving the quality of the casting.关键词：Aluminun-Bronze;Investment Casting;Slag
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发布时间：2023-12-18 - 摘要：The mechanical vibration with a vertical direction was exerted on the AZ91 D magnesium alloy produced by expendable pattern shell casting,and effects of vibration frequency and amplitude on filling ability of AZ91 D magnesium alloy were investigated.Meanwhile,comparison between vibration and vibration-free was also analyzed at different pouring temperatures.According to analysis of the length and area obtained at different parameters,effects of mechanical vibration on filling ability of the AZ91 Dmagnesium alloy produced by expendable pattern shell casting were investigated.The results show that filling ability of the alloy with the mechanical vibration greatly improved compared to the alloy without vibration at different casting temperatures,and the lower the pouring temperature,the greater the ability to increase.At 690 ℃,the filling length is improved by 75.6%,and the filling area is increased by82.3%.With the increases of vibration frequency and amplitude,the filling ability of AZ91 Dgradually is increased gradually.When the vibration frequency is 100 Hz and the amplitude is 1.0mm,the AZ91 D magnesium alloy produced by the expendable pattern shell casting exhibits desirable filling ability.关键词：Mechanical Vibration;Expendable Pattern Shell Casting;Filling Ability;Magnesium Alloy
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发布时间：2023-12-18 - 摘要：Effects of mica powder on coating sintering of the quartz based LFC coating were investigated through the single factor gradient method.Meanwhile,the coating samples with mica powder were conducted bending strength analysis,SEM analysis,XRD analysis.The results show that the presence of mica powder can promote coating sintering.With the increase of mica powder addition,sintered performance of the coating is improved.With the mica powder of 1.0%,the coating exhibits excellent use performance and process performance.关键词：LFC;Coating;Mica Powder;Sintering
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发布时间：2023-12-18 - 摘要：Influence of Mg2 Si particles in form of uniform and random distribution mode on stress field in magnesium matrix was simulated by ANSYS software.The simulated results show that with a smaller particle distance and even less than effective interference distance,interference effects among the particles will take stress concentration among neighbor particles.Angle among the particles can directly affect the interaction among particles.When the particles spacing is less than the effective interference with central connection between the particles parallel to load direction,maximum stress concentration can be observed.At the same conditions,the mechanical properties of in situ Mg2 Si particles with uniform distribution is superior to those of ones with random distribution.关键词：In-situ Mg2Si Particles;Distribution Methods;Stress Distribution;Finite Element Analysis
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发布时间：2023-12-18 - 摘要：Using iron powder,nickel powder,high carbon ferromanganese powder,ZTA particles as raw materials,ZTA particles reinforced high manganese steel surface composites were prepared by powder metallurgy technology combined with casting sintering technology.Microstructure of the composites prepared was observed by metallurgical microscope and SEM（scanning electron microscopy）.The results reveal that the microstructure of composite surface layers is obviously superior to that of high manganese steel,and interface reaction is conducted in the interface of composite surface layers and ZTA particles,and element distribution is changed after heat treatment.The bonding of surface composites matrix and high manganese steel exhibits desirable.关键词：ZTA;High Manganese Steel;Surface Composites;Interfacial Bonding
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发布时间：2023-12-18 - 摘要：Laminated woven fiber reinforced aluminum matrix composites were prepared by hot pressing diffusion method.Effects of hot pressing temperature,hot pressing pressure and hot pressing time on formation and relative density of the composites were analyzed.Forming parameters for preparing laminated woven fiber reinforced aluminum matrix the composition were optimized.Microstructure and interfacial reaction of the composites were analyzed based on the optimized parameters.The results show that hot pressing temperature is mainly responsible for relative density of the composite.The optimized parameters of laminated woven fiber reinforced aluminum matrix composite by hot pressing diffusion are presented as follows:temperature of 640℃,time of 50 min and the pressing pressure of 15 MPa.Based on the optimized parameters,the relative density of the composites reaches 98.5%,and the approximate content of Al4C3 is 3.6%.Compound of carbon fiber and aluminum matrix exhibits desirable.The interface between aluminum matrix and carbon fiber is rough with generation of a little rod-like Al4C3 phase.关键词：Hot Pressing Diffusion;Laminated Woven Fiber Reinforced Aluminum Matrix Composite;Mi-crostructure;Interface Reaction
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发布时间：2023-12-18 - 摘要：TiC reinforced Fe matrix composites were prepared by in-situ synthesis process.Influences of copper on the microstructure and proprties of TiCp/Fe composites were investigated by using optical microscopy and SEM（scanning electron microscopy）.The results show that with the increase of copper,the lamellar graphite in the TiCp/Fe is suppressed effectively,and the hardness,tensile strength and impact toughness of the composites are improved obviously.1.5% copper addition is suitable.关键词：In-situ Reaction;TiCp/Fe Composites;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：By comparing with Sn-9Zn/Cu joints,the growth behavior of interfacial intermetallic compound（IMC）in Sn-8Zn-3Bi/Cu joints with isothermal aging at 85℃ was investigated.The results show that the interfacial reaction of Sn-8Zn-3Bi/Cu exhibits more sufficient compared with Sn-9Zn/Cu at the same soldering process.During isothermal aging at 85 ℃,the interfacial IMC layer exhibits stable and the change of growth rate of IMC at the interface of Sn-8Zn-3Bi/Cu joints becomes slight.The growth rate of the interfacial IMC layer of Sn-8Zn-3Bi/Cu joints exhibits fast at initial stage,and then slow down obviously.The melting point of solder is decreased due to the addition of Bi,resulting in a sufficient reaction of interface at the initial stage.With increasing in interfacial reaction time,the suppression effect of Bi on Cu-Zn IMC appears significantly,and the time index of growth kinetics is decreased markedly.关键词：Sn-Zn Solder;Intermetallic Compound（IMC）;Interface;Aging;Growth Behavior
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发布时间：2023-12-18 - 摘要：By atomic spectrum analysis and metallographic microscope,SEM and other testing equipment,composition,microstructure and property characteristics of the tin phosphor bronze alloy were investigated,and the mechanism and origination of bending breakage of the alloy were analyzed.By adjusting the cold working,intermediate heat treatment,product heat treatment and processing rate,grain size is decreased from 3560μm before adjustment to 1030μm,and the transverse-longitudinal bending performance of the alloy is improved obviously.The results reveal that origination of the Cu-5.6Ni-0.15 Palloy bended breakage is attributed to S segregation as a result of excessive S content and the second phase composed of Cu、Sn、Zn、S distributed along the rolling direction of grain boundary.关键词：Bronze;Transverse Bending Performance;SEM
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发布时间：2023-12-18 - 摘要：The practical technology for hollow aluminum alloy ingot by hot top casting method was described.The mechanism of eccentricity and tension crack of inner hole as well as aluminum leakage of hollow ingot was analyzed.Technological improvements especially die casting die structure improvement was presented.The results show that the hollow ingot produced by the modified mould exhibits uniform wall thickness,meeting the quality requirements of hollow ingot during extrusion process.The qualified aluminum alloy seamless pipe was produced.关键词：Hollow Ingot;Hot Top Casting;Eccentric;Inner Hole Cracking;Aluminum Leakage
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发布时间：2023-12-18 - 摘要：Through testing and analyzing secondary dendrite arm spacing in metal permanent mold casting aluminum alloy with varied ultrasonic power,effects of ultrasonic power on the secondary dendrite arm spacing were investigated.The results show that the secondary dendrite arm spacing is decreased greatly with increasing in ultrasound power.When the power is more than 600 W,the secondary dendrite arm spacing is increased gradually.At the fixed ultrasonic power treatment on testing bar with different diameters,the secondary dendrite arm spacing is increased with increasing in diameter.Effects of ultrasonic power on aluminum alloy melt at the bottom and side of tool head exhibits significant,and the grain size in aluminum alloy at side becomes fine,while structure of the aluminum alloy at the bottom is converted into equiaxed grain.关键词：Ultrasonic Power;Aluminum Alloy;Secondary Dendrite Arm Spacing;Permanent Mold Casting
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发布时间：2023-12-18 - 摘要：Microstructure and mechanical properties of as-cast Mg-12Er-xZn-0.6Zr（x=0,0.6%,1.8%）alloys were investigated using optical microscope（OM）,X-ray diffraction（XRD）,DSC and compressive test.The results reveal that as-cast Mg-12Er-0.6Zr alloy is composed of singleα-Mg phase with composition segregation.With the addition of 0.6% Zn,the grain is refined and a new X phase（Mg12ErZn）can be observed.With the increase of Zn addition to 1.8%,the absence of grain size and phases change can be observed,however,the volumetric fraction of Xphase is increased significantly.The Zn addition can substantially improve the yield strength and fracture strength,while slightly decrease the plasticity of the alloy.关键词：Magnesium Alloys;Mg-Er-Zn-Zr;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：According to the principle that self-pairing of the same metal could increase the friction coefficient,friction flow welding was conducted on 6061-T6 aluminum alloy by using improved pinless friction stirring tool.Tensile fracture mechanism of the weld was analyzed using macro-morphology analysis and tensile testing.The results show that embedding the material to be welded in form of bar into the friction stir tool can increase friction and adhesion between the friction stir tool and the workpiece,thereby increasing thickness of the plastic zone of the weld.The larger the diameter of the bar embedded into the friction stir tool,the higher the soldering temperature-increment rise rate.When diameter of the bar reaches 10 mm,tensile strength of the weld reach up to 250MPa（86% of the base material）,which is1.8times of the sample welded with ordinary friction stir tool.关键词：Pinless Friction Stirring Tool;Friction Flow Welding;Thickness of Plastic Zone;Tensile Strength
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发布时间：2023-12-18 - 摘要：<正>20150101 Hadadzadeh A,Wells M A.AZ31镁合金带材双辊铸轧热力学行为数值模拟研究.Journal of Magnesium and Alloys,2013,1:101-114.双辊铸轧（TRC）工艺兼有铸造和热轧优势,是替代近净成形镁合金板材新型铸造工艺,其代表产品为厚210mm的镁合金板材。在双辊铸造工艺中,板材的冷却凝固速率范围为102103℃/s,相对于直接连续铸造（DC）,双辊铸轧的高冷却速率使轧辊铸造状态下AZ31合金的γ相分布更均匀。利用有限元软
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发布时间：2023-12-18 - 摘要：<正>在中国机械工业企业管理协会主办,机械经济管理研究院、世界企业实验室协办的2014（第十二届）《中国机械500强研究报告》中,力劲集团全资公司中山力劲机械有限公司再次被评为"中国机械500强",此为力劲集团子公司自2006年起连续8年获此殊荣,足以证明力劲集团在机械制造领域的实力及影响力。
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发布时间：2023-12-18 - 摘要：<正>希利欧工业公司（Shiloh Industries Inc.）在田纳西州的Clarksville新开了一个铝压铸工厂。这家以专门制造轻型卡车、重型卡车及其他设备的企业于2013年8月购置了这块地皮。预计在未来的5年内,希利欧公司将投资2000多万美元来发展壮大这个新建的工厂,并新增150个就业岗位。
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发布时间：2023-12-18 - 摘要：<正>近日浙江华大铝镁业有限公司与湖北省麻城市签约,年产65万吨高性能铝镁合金型材及新材料生产项目正式落户该市。据了解,签约后,整个项目投资20亿元,在麻城经济开发区征地670亩,建设周期为36个月,项目全部建成投产
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发布时间：2023-12-18 - 摘要：<正>重庆元和利泰镁合金制造有限公司（"重庆元和利泰"）镁合金汽车零部件生产项目一期工程正式建成投产,主要生产镁合金发动机壳和变速箱外壳,年生产能力100万件。重庆元和利泰是渝东南生态保护发展区首家汽车零部件生产企业。该项目于2013年8月与重庆市黔江区正阳
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发布时间：2023-12-18 - 摘要：<正>近日,广东金镁镁业将投资5亿元打造镁合金产业园。此举将进一步拓展镁合金深加工产业链,打造华南地区镁合金产业集群。镁合金产业园是集镁合金产业的科研、生产、销售以及相关配套产品为一体的新材料产业园。该产业园占地300亩,项目总投资5亿元,5年内分3期投入。
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发布时间：2023-12-18 - 摘要：<正>第十三届中国国际铸造博览会暨第十一届中国国际压铸工业展览会举行期间,全国铸造行业准入公告管理工作交流会将在上海国家会展中心召开。国家工业和信息化部于2013年5月10日正式发布公告《铸造行业准入条件》,2013年9月30日公布《铸造行业准入公告管
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发布时间：2023-12-18 - 摘要：<正>据报道,凯迪拉克CT6将于2015年4月在纽约车展亮相,并有望于2016年年底上市。新车将采用全铝车身打造,基于通用最新研发的Omega大型车后驱平台,采用轻量化设计,整车质量将降低,推测整车质量在16781860
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发布时间：2023-12-18 - 摘要：<正>2015年1月6日,大力神铝业股份有限公司的热轧车间机器轰鸣,全球屈指可数的宽幅"1+1"热连轧生产线正在试产。至今年6月,这家拥有年产25万吨铝合金能力的企业将正式全面投产,产品可涵盖厚度0.005250mm、宽
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发布时间：2023-12-18 - 摘要：<正>2014年12月19日,筹备多年的伊之密首次公开发行股票并在创业板上市申请通过了中国证监会创业板发行审核委员会审核。十年磨一剑!在经历两年多的漫长等待后,伊之密IPO项目终于得以顺利过会,有望成为第一家在深交所创业板上市的模压成型装备制造企业。
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发布时间：2023-12-18 - 摘要：<正>据法特士集团公司介绍,100万台中轻卡变速器项目位于宝鸡市高新区汽车产业园区,总占地面积800多亩,总投资30亿元。项目建成后,将形成年产中轻卡系列变速器100万台的综合产能,实现销售收入50亿元。法士特集团公司表示,100万台中轻卡变速器项目是
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发布时间：2023-12-18 - 摘要：<正>最近一年多来,苏州三基铸造装备股份有限公司在立式挤压铸造工艺研发及实际应用上取得多项重大突破。据介绍,苏州三基铸装挤压铸造工艺研发及应用成果包括:为一汽红旗H7研制的汽车前副车架,为中联重科研发的工程机械变速箱,以及为某国际品牌汽车开发的离合器壳体。
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发布时间：2023-12-18 - 摘要：<正>中国西部工业重镇重庆市在2014年生产了6 400万台电脑,占全球总产量的36%,比2013年的产量增长了15%,成为全球最大的笔记本电脑生产基地。重庆市经信委发言人表示,2014年重庆生产了6100万台笔记本电脑,300万台平板电脑,其他各种网络通信产品1亿台,智能终端产品将近2亿台。该发言人还称,2014
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- 95
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发布时间：2023-12-18 - 摘要：<正>总投资20.11亿元的吉利集团发动机项目在浙江省义乌经济技术开发区奠基。该项目总占地面积139亩,投资建设年产50万台汽油、甲醛、天然气3种燃料发动机生产线。新发动机项目由吉利集团旗下的浙江吉利罗佑发动机有限公司全额出资,主要以生产JLA-3G10及JLC-4G系列发动机为主。
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发布时间：2023-12-18 - 摘要：<正>中国著名压铸设备制造商广东伊之密精密机械股份有限公司（下称"伊之密"）在海外市场捷报频传,先后收获韩国、北美地区客户的多台压铸设备订单。这标志着这家来自中国的压铸机品牌正赢得越来越多海外客户的认可。今年六月底,伊之密为其韩国客户成功交付一台锁模力1650T重型压铸机。这是其在韩国赢得第一台重型压铸机海外订
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发布时间：2023-12-18 - 摘要：<正>起步于20世纪90年代的3D打印技术现今已经悄然用于航空航天、汽车制造、食品等工业领域,在医学领域的应用更为耀眼。2014年12月13日,北京大学第三医院骨科主任刘忠军教授在2014北京大学3D打印骨科应用国际论坛上表
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发布时间：2023-12-18 - 摘要：<正>国内最大的汽车铝合金车轮制造企业之一浙江万丰奥威汽轮股份有限公司（"万丰奥威"）日前透露,为满足印度、印尼、越南等地区需求及多家主机厂商邀请,公司在印度设立了万丰铝轮（印度）私人有限公司,目前该项目正在紧锣密鼓的建设中,有望在2015年释放产能
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发布时间：2023-12-18 - 摘要：<正>《中国铸造协会精密铸造分会第七届会员大会暨精铸出口企业2014工作年会》于12月9日在长沙召开。本次会议报到代表共有236家企业,337位代表,其中精铸企业,科研机构及铸件采购商共147家企业188位代表,精铸原辅材料
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发布时间：2023-12-18
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