最新刊期
卷 36 ， 期 8 ， 2016
- 摘要：The microstructure of Au-Ge eutectic alloy was characterized using optical microscope and electron probe micro-analyser,and its melting and solidification curves were tested by DSC in order to understand effects of 0.2% Sb addition on as-cast microstructure of Au-Ge eutectic alloy.The results show that primaryα-Au phase morphologies in Au-Ge eutectic alloy are converted from long rod/needle into petal/dendrite with 0.2% Sb addition,and its size is refined significantly.Meanwhile,the size of granular eutectic Ge phase is reduced remarkably.The refinement mechanism of primaryα-Au phase and Ge phase is attributed to constitutional supercooling and eutectic undercooling degree increase caused by the element Sb,respectively.关键词：Au-Ge Eutectic Alloy;Sb;As-cast Microstructure;Refinement Mechanism
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发布时间：2023-12-18 - 摘要：In order to decrease the burning loss of SiCpand improve the wettability of SiCpin PTA welding process,the Co-based overlaying coating reinforced by nickel coated silicon carbide particles on H13 steel surface was prepared with the modified plasma gun.Coating phases were identified by XRD.Microstructure of coating was obserbed by OM and SEM.Microhardness of coating was tested by microhardness tester.The results show that coating is composed of cellular crystals in bonding area,the dendrites in coating area and some particle phase.Hardfacing layer is mainly composed of the silicides of Cr and Co,Cr carbides such as Cr23C6 and M7C3,solid solution of Co,and a small amount of SiC at the top of hardfacing layer.Microhardness of coating is decreased gradually from the surface to the substrate,and exhibits the gradient distribution.The average microhardness of surface reaches 800 HV.关键词：Plasma Hardfacing;Co-based Coating;Microstructure;Nickel Coated Silicon Carbide
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发布时间：2023-12-18 - 摘要：The effects of Er element on textures of Al-Mg-Si-Cu alloy sheets were investigated by means of orientation distribution functions（ODFs）.The results show that the major textures of as-rolled AlMg-Si-Cu alloy sheets are composed of rotated cube texture{100}<011>,and{111}<110>、{111}<112> brass Rtexture,while conventional rolling B,S,Ctextures are very low,which is closely related with a large number of dispersedly intermetallic compound particles contained in the alloy.After solution heat-treatment,the major textures of Al-Mg-Si-Cu-Er alloy contained 0.1% Er element are Brass texture and Cube+ND25texture.PSN is one of the recrystallization nucleation mechanism of aluminum alloy.As the Er content increase to 0.2%,the major texture of aluminum alloy is the weaker Brass texture,and PSN nucleation is receded.Er can affect the matrix lattice and reduce the energy of the fault layer as well as restricting the cross slide.关键词：Al-Mg-Si-Cu Alloy;Er Element;Texture
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发布时间：2023-12-18 - 摘要：For the low plasticity and large height-diameter ratio aluminum magnesium alloy parts,the traditional processing method is difficult to achieve deep drawing with one time.For forming demand in aerospace and other fields,numerical simulation of multi-stage deep drawing process for the aluminummagnesium alloy（5A06）cylindrical parts was carried out.To meet the forming need of aluminum-magnesium alloy with large height-diameter ratio cylindrical cup,a forming process named hydrodynamic deep drawing（HDD）with radial hydraulic pressure was proposed.The results indicate that under the reasonable match of liquid chamber pressure and radial pressure loading paths,crack and deforming deficiency can be controlled,meanwhile,the forming steps and the forming limitation are reduced effectively.After the trial production,the numerical simulation analysis results was verified,and the qualified cylindrical part 5A06 was produced successfully.关键词：Numerical Simulation;Multi-stage Deep Drawing;HDD with Radial Hydraulic Pressure;Forming Limitation
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发布时间：2023-12-18 - 摘要：Effects of temperature,extrusion speed and friction coefficient on the stress distribution in the extrusion forming process of Ti-1023 alloy were simulated by DEFORM-3Dfinite element software.The microstructure evolution law of the Ti-1023 alloy during extrusion process was simulated by the cellular automaton（CA）method.The results show that the stress distribution under different extrusion conditions is different,and the stress concentration appears in the extrusion die gate,and frictional force has a relatively effect on stress distribution.The microstructure simulation shows that the dynamic recrystallization in the alloy can be observed at the stable extrusion stage with the increase of the extrusion deformation,and the grain size is refined.The dynamic recrystallization softening effect leads to the extrusion load decrease from peak and to be relatively stable.The average grain size is decreased with the extrusion speed increase at the same deformation rate.关键词：Ti-1023 Titanium Alloy;Extrusion;Stress;Microstructure Evolution
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发布时间：2023-12-18 - 摘要：Numerical simulation of temperature and porosity prediction algorithm during casting solidification process was analyzed to develop the SIMU-CAST software.The software can predict temperature field and casting defects,such as shrinkage porosity（holes）based on FEM method,where non-linear features of material characteristics and boundary condition as well as latent heat treatment are taken into account.The simulated result of shrinkage porosity by the self-developed software was compared with that of one by the ProCAST software.The comparative result is satisfied.关键词：Casting Solidification;Temperature Prediction;Porosity Prediction
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发布时间：2023-12-18 - 摘要：Collocated grids were introduced melting model design.Based on the simplified physical model of induction furnace,mathematical model to describe the physical process was established,and the simulated results of the temperature field in induction heating were presented.Finite volume method was used to solve flow field of mechanical stirring process,meanwhile,the flow behavior and temperature distribution were analyzed.The simulated results reveal that induction heating begins at the peripheries where hot spot can be formed possible after melting,and mechanical stirring can promote greatly temperature homogenization.关键词：Induction Melting;Mechanical Stirring;Collocated Grids;Numerical Simulation
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发布时间：2023-12-18 - 摘要：The finite element simulation of the hot extrusion process for the Mg2B2O5w/AZ63 Bunder different processes was carried out by using DEFORM-3Dsoftware.The effects of the varied extrusion temperatures（250 ℃,300 ℃,350 ℃）and speeds（1mm/s,4mm/s）as well as extrusion ratio（6.25,14,20.25）on equivalent stress of the extruded composites were analyzed.The simulation results reveal that temperature has significant role in equivalent stress,and the maximum equivalent stresses are decreased from 185 MPa to 135 MPa when the extrusion temperature is increased from 250℃to 350℃.In addition,the maximum equivalent stresses are decreased from 184 MPa to 167 MPa when the extrusion speed is increased from 1mm/s to 4mm/s at fixed ratio and temperature.With the increase of the extrusion ratio,the equivalent stresses of the billet in the extrusion chamber are increased and the extrusion billet in the die taper angle suffers a strong extrusion and shearing deformation.Therefore,the grains sizes are refined and the distribution of the equivalent stresses becomes more uniform.关键词：Extrusion Forming;FEM Simulation;Equivalent Stress
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发布时间：2023-12-18 - 摘要：The combination of the inner gate and the runner was analyzed by the analysis of different schemes to understand filling velocity field of metal liquid based on the gating system of control arm for automobile.The variance of the flow velocity in the inner gate was compared to select the optimized filling combination.The results reveal that due to the change of the cavity size,there exist optimized filling velocity at different cross section.The filling velocity of liquid metal at different cross section was presented.关键词：Squeeze Casting;Ingates;Filling Speed;Stability;Numerical Simulation
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发布时间：2023-12-18 - 摘要：The microstructures evolution and mechanical properties of squeeze cast Al-5.0Cu-0.8Mg-0.5Fe alloys were investigated by metallographic microstructure observation,scanning electron microscopy,tensile testing.The results reveal that the tensile properties of Al-Cu alloy containing high Fe content are improved greatly with the applied pressure increasing from 0to 75 MPa,which are attributed to the applied pressure promoting the formation of Chinese script AlmFe and preventing the precipitation of needle-likeβ-Fe,refining Fe-rich intermetallics as well as decreasing cast defects.With the applied pressure of 75 MPa,the tensile strength and elongation of the alloy reach 258 MPa and 8.5%in as-cast condition,while they reach 432 MPa and 6.7% after T6 heat treatment,respectively.关键词：Squeeze Casting;Mechanical Properties;Al-Cu Alloys;Iron-rich Intermetallics
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发布时间：2023-12-18 - 摘要：3D model of the connected sleeve with gating system was established by Pro/E software.Through selecting a set of parameters,separately meshing the connected sleeve with two different gating system of 3D model,the possible locations of shrinkage cavity were predicted effectively during the filling and solidification process.According to the simulated results,the location of gating system was presented.关键词：Aluminum Alloy;Gating System;Die Casting;Numerical Simulation;ProCAST Software
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发布时间：2023-12-18 - 摘要：ZL114Aoil circuit shell casting was produced by the low pressure casting.Effects of the optimization of composition,grain refinement and melt treatment of ZL114 Aon the microstructure and mechanical properties of the shell casting were investigated.Furthermore,The processing parameters of low pressure casting and solidification process were simulated by the ProCAST software.The results show that,by using high purity raw material,alloy composition optimization,refinement of the alloy and melt purification treatment,the performance of ZL114 Aalloy is increases greatly.Slot gating system and thick area placed chill can improve the internal quality obviously of the shell casting with decreasing shrinkage porosities.关键词：ZL114A alloy;Numerical Simulation;Low Pressure Casting
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发布时间：2023-12-18 -
Influence of Mg Content on Mechanical Properties and Microstructure of the AlSi10MgMnFe Die Castings
摘要：The content of gas in the die castings could be reduced by vacuum die casting（VDC）,so the castings fabricated by VDC can be subjected to the high temperature short time heat treatment with steady dimension and absence of blisters on the surface.With Mg concent of 2.1%,the elongation of the die castings reaches up to 6%.The tensile strength of the as-cast alloy is increased with increasing in contend of Mg,where the yield strength of the die casting reaches up to 163 MPa with 0.65% Mg content.After the artificial aging,with the Mg content of 0.89%,the tensile strength of the alloy is 356.2MPa.关键词：Vacuum Die Casting;High Temperature Short Time Heat Treatment;Artificial Aging;Mg- 2
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发布时间：2023-12-18 - 摘要：The process and mould structure of squeezing casting sleeve-inserted-pipe were introduced,and processing parameters were presented.The results reveal that it is feasible for producing sleeve-insertedpipe for electric-drive automobile by squeezing casting.The sleeve-inserted-pipe produced exhibits accuracy size and appearance with absence of shrinkage porosity（holes）by X-ray detection,meeting the technological requirement in quality.Meanwhile,the mould shows high efficiency and stable production quality.关键词：Squeezing Casting;Electric-Drive Automobile;Mould
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发布时间：2023-12-18 - 摘要：The mechanical vibration was applied on the ZL101 Aalloy during the expendable pattern shell casting,and effects of amplitude on microstructure and mechanical properties of the expendable pattern shell casting ZL101 Aalloy were investigated.The results show that without mechanical vibration,the morphologies ofα-Al primary phase and eutectic silicon exhibit coarse and long rods,respectively,so the mechanical properties of aluminum alloy is low.After the mechanical vibration was applied,microstructure and mechanical properties of the aluminum alloy were improved greatly.With increasing in amplitude,the microstructure and mechanical properties of aluminum alloy are increased more and more.When the amplitude is 1.0mm,theα-Al primary phase shows fine equiaxed morphology,and the eutectic silicon exhibits fine short rod structure.Comparing with those of ones without mechanical vibration,the size ofα-Al primary phase and secondary dendrite arm spacing are decreased by 39% and 19%,respectively,while the shape factor is increased by 262%.In addition,length,width and length-width ratio of the eutectic silicon are decrease by 45%,6% and 42%,respectively,meanwhile,the tensile strength,yield strength,elongation and hardness of the aluminum alloy are increase by 35%,21%,60% and 9%,respectively.关键词：Mechanical Vibration;Expendable Pattern Shell Casting;Aluminum Alloy
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发布时间：2023-12-18 - 摘要：The difference of casting technologies for deep pine shovel tip among lost foam casting,the iron based coated sand,the sand mold was analyzed.Lost foam casting for deep pine shovel tip was designed and simulated by ProCAST software.Then,optimized parameters of lost foam casting were presented as follows:bead density of 2024g/L,vacuum rate of-0.05-0.06 MPa for 5 min during pouring process.The casting hardness of deep pine shovel tip reaches up to 51 HRC,exhibiting the satisfied wear resistance.关键词：Deep Pine Shovel Tip;Lost Foam Casting;Numerical Simulation;Wear Resistence
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发布时间：2023-12-18 - 摘要：The formation mechanism of segregation with various morphology of spot,banded and line shape in lead air section of ZL205 Acastings used for the reverser of aero-engine with thin-walled,heteromorphosis and mutant cross section was analyzed by OM（optical microscopy）,SEM（scanning electron microscopy）and EDS（energy dispersed spectrometer）.The results show that the formation of spotshaped segregation in the lead air section of the cooling castings is contributed to the aggregation of Ti and Zr cluster,while the formation of banded and line shape segregation is the result of the Al2 Cu eutectic segreagtion during the solidification process.The segregation degree is relieved greatly through adjusting the remelting and casting process of the alloy.关键词：ZL205A;Segregation;Mechanism;Processing
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发布时间：2023-12-18 - 摘要：Interface reactions between superalloys and the ceramic materials in investment casting were reviewed.The interface reaction between superalloy and ceramic materials is closely related with ceramic material kinds,alloy composition.SiO2 in ceramic materials and C,Cr,Al,Hf elements in superalloy are the key elements for interface reaction.The reaction products consist of Al2O3,Cr2O3 and HfO2,greatly affecting the quality of castings.The content of active elements should reach up to proper level to realize interface reaction.关键词：Investment Casting;Superalloys;Ceramic Materials;Interface Reactions
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发布时间：2023-12-18 - 摘要：Effects of reheating time on the in-situ formation of core-shell structured particle were investigated.The results indicate that thickness of the shell is increased gradually to subsequently rupture and peel off with the increase of the reheating time.By the XRD analysis,the result shows that the reaction products are transformed fromτ2phase into Ti（Al,Si）3phase with increasing in the reheating time.The previous research indicates that the optimized temperature of the Al-7Si-Mg alloy powder is 590 ℃,where the matrix alloy possesses an ideal semisolid microstructure.The Ti core-shell structured can be obtained after being heated for 30 min at 590℃.The core-shell structural particle was tested by nanoindentor,and the results show that the microhardness of the shell and core reach up to 6.97 GPa,1.22 GPa,respectively.关键词：Al Matrix Composites;Microstructure;Core-shell Structural Particle;Reheating Time
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发布时间：2023-12-18 - 摘要：The composites of MMCs and steel with three dimensional interpenetrating network structure（3D-MMCs/steel）were fabricated by 3Dprinting combining with pressure infiltration method.Zirconiatoughened alumina（ZTA）particles are taken as the reinforcement of MMCs,and the matrix of the MMCs and the steel are 40 Cr steel.The MMCs area and the steel area in the composite are continuously interpenetrated in the three dimensional network.The microstructure and impact abrasive wear behavior of the composite were analyzed by comparing with those of the ZTAp/40 Cr composites.The results show that the wear volume loss of 3D-MMC/steel composite is reduced by 31.24%,and the composites prepared have complete structure and satisfied bonding interface.关键词：Composites;Three Dimensional Interpenetrating Network Structure;3DPrinting
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发布时间：2023-12-18 - 摘要：The chopped carbon fibers reinforced magnesium composites（Csf/AZ91Dcomposite）were prepared by vacuum assisted pressure infiltration method.The hot deformation behavior of Csf/AZ91 Dcomposites prepared was investigated at 400490 ℃ and strain rate of 0.0010.1s-1 as well as maximum deformation strain of 50%.The microstructure of the composites before and after deformation was observed by optical microscope,and the hot plastic deformation mechanism of the composites prepared was approached by comparing with the magnesium alloy.The results indicate that the strain softening of the composites prepared is the more significant than that of the corresponding magnesium alloy due to the rotation and breakage of whiskers during hot compression process.The matrix microstructure is refined by the chopped carbon fibers during fabrication,and the quantity of interface including grain boundary and phase interface is increased accordingly.As a result,the composites prepared exhibit a high strain rate sensitivity.In addition,the strengthening effect of short carbon fiber and grain boundary is weaken,and the stress level of the composites is decreased significantly with the increase of the deformation temperature.The apparent deformation activity energy of the composites is the higher than that of the corresponding magnesium alloy.关键词：Csf/AZ91D Composites;Hot Deformation;Flow Stress;Deformation Mechanism
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发布时间：2023-12-18 - 摘要：Effects of K2ZrF6 content on the microstructure and mechanical properties of A356 alloy were investigated.The results show that the microstructure of A356 alloy with K2ZrF6 addition is improved significantly.With increasing in K2ZrF6 addition,the morphology of primaryα-Al is converted from developed dendrite to fine equiaxed dendrite.Moreover,the morphology of eutectic Si is modified from coarse acicular to fine vermicular and particle-like.However,the alloy exhibits over-modification with the addition more than 1.0%.Mechanical properties of A356 Alloy are increased firstly and then decreased.With 1.0% K2ZrF6 addition,the tensile strength and elongation of A356 alloy are increased by29% and 95%,respectively,compared with those of alloy without K2ZrF6 addition.关键词：K2ZrF6;A356 Alloy;Modification;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The effects of processing parameters,such as pressing temperature,pressing pressure and holding pressure time,on quality of ADC12 recycling billet produced by chip solid pressing（CSP）were investigated by Taguchi method and design of experiment（DOE）.Optimization of processing parameters was carried out on the basis of the signal-to-noise ratio（S/N）and analysis of variance（ANOVA）of experimental results.Then the validity of the method and its confidence interval were confirmed by the verification test.The results show that optimized process parameters are presented as follows:pressing temperature of 250 ℃,pressing pressure of 640 MPa and holding pressure time of 47 s.关键词：Optimized Design;Quality Control;ADC12 Alloy;CSP Process;Taguchi Method
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发布时间：2023-12-18 - 摘要：A bracket was produced with ZL205 Aaluminum alloy.Combining with the structure formability and solidification characteristics analysis,the gravity pouring was adopted,and distribution of solidification field,temperature field and solid phase were calculated by the ProCAST softwate.The optimized process parameters were determined,and the solidification sequence from outside to inside and from bottom to top was achieved,improving the quality of the solidification metallurgical and meeting the technical requirements.The average tensile strength,yield strength and elongation of the bracket after T6 treatment reach up to 485 MPa,430 MPa and 7.8%,respectively.关键词：ZL205A Alloy;Gravity Pouring;Numerical Simulation;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The effects of different mechanical vibrating parameters,such as vibration frequency,amplitude and vibrating angle,on the mechanical properties and microstructure of A356 alloy were investigated by tensile testing and microstructural observation.The results show that primary Al phase and secondary dendrite in A356 alloy exhibit fine with desirable strength and elongation with frequency of 2030Hz,amplitude of 0.30.6mm as well as vibration angle of zero.关键词：Mechanical Vibration;A356 Alloy;Mechanical Properties;Microstructure
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发布时间：2023-12-18 - 摘要：Al-Ti-B alloy wire was added to new high strength wear resistant piston materials—BH135online referring to understand its refining effects.The results reveal that Al-Ti-B wire is independent on the Al-P modification.With 0.1% Al-Ti-B wire,coarse columnar grain and feathery grain in BH135 alloy are converted into fine equiaxed grain,where the grain size is refined to approximately 576μm.Meanwhile,the tensile strength,elongation and fatique rength of the modified BH135 alloy are increased by 3.8%6.0%,13%,11.4%17.1%,respectibely.关键词：Piston Materials;Al-Ti-B Alloy Wire;Refining;Microstructure and Properties
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发布时间：2023-12-18 - 摘要：Four types of 7050 aluminum alloys with different scandium addition were prepared,and effects of scandium on the microstructure,mechanical properties and recrystallization behaviour of 7050 alloy were investigated.The results show that scandium has a remarkable refining effect on the microstructure of as-cast 7050 alloy,and the grains in the alloy are transformed to fine equiaxed grain from coarse dendrite with increasing in scandium content.The tensile properties of the alloy are obviously enhanced with absence of decreasing the plaseticity of the alloy by adding a small amount of scandium to7050 alloy,and the best tensile properties can be obtained with the scandium content of 0.26%.However,it has no obvious effect on the mechanical properties of the alloy by adding more scandium to 7050 alloy.Compared with that of the 7050 alloy without addition of scandium,the recrystallization temperature of the 7050 alloy with the scandium content of 0.26%rises,and the starting recrystallization temperature of the alloy is raised to above 480 ℃.关键词：7050 Aluminum Alloy;Scandium;Mechanical Properties;Recrystallization
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发布时间：2023-12-18 - 摘要：Al coating was prepared on the surface of AZ31 B magnesium alloy by means of oxygen acetylene spraying,and the coating on the AZ31 Balloy prepared was treated by hot pressing treatment.Microstructure and surface scanning elements distribution of hot pressing coating were analyzed by SEM,EDS,and corrosion resistance of the hot pressed coating was tested through the immersion test and electrochemical workstation.Meanwhile,the hardness of the coating was analyzed by micro hardness tester.The results reveal that after hot pressing,coating thickness is reduced significantly,and the porosity disappears.In addition,the hot pressed Al coating has a better corrosion resistance compared with the Al coating and substrate.Meanwhile,hardness of the hot pressed Al coating is the 1.22 times of the Al coating.关键词：Hot Pressed Al Coating;Polarization Curve;Corrosion Resistance;Micro-Hardness
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发布时间：2023-12-18 - 摘要：By using computer-based microscope,X-ray diffraction,electron microscopy with energy dispersive spectroscopy and so on,effects of sensitization temperature and time on number,structure,distribution,morphology and chemical composition of precipitates in Incoloy028 alloy samples prepared under different conditions were investigated.Meanwhile,using 10% the oxalic acid sample,influence of precipitates on corrosion resistance of the Incoloy028 alloy was analyzed.The results reveal that a higher secondary precipitates from Incoloy028 alloy with sensitization treatment at 8001 000 ℃ can be observed while a less precipitates can be observed at about 700 ℃.At the same sensitizing temperature,with the extension of sensitization time,precipitates in the alloy can be increased gradually,in which Cr,Mo element content is increased,while Fe,Ni element is decreased,which is responsible for the decrease of corrosion resistance of Incoloy028 alloy.关键词：Sensitization;Incoloy028 Alloy;Sensitizing Temperature
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发布时间：2023-12-18 - 摘要：The spring contact finger of beryllium bronze was prepared with TIG by lapping welding form,and microstructure and properties of the samples were investigated comprehensively.The experimental results indicate that the welding point microstructure is similar with that of the matrix,and the tensile strength reaches about 800 MPa,being 93% of the matrix,meanwhile,the hardness is about 420 HV,being equivalent with those of the matrix.In addition,the electron resistivity is about 0.069 9×10-6Ω·mm2/m,which is superior to that of the matrix.关键词：TIG;Spring Contact Finger;Microstructure;Corrosion Resistance
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发布时间：2023-12-18 - 摘要：Influence of the conductivity of working fluid on quality of brass surface with low melting point and low hardness was investigated by single factor experiment.Based on observation and analysis of the surface microscopic morphology and chemical composition in processing surface,the processed surface roughness and the surface layer of the brass after cutting three times by electric sparking were analyzed.The results reveal that the surface roughness of the brass has a highly significant non-linear relationship with the conductivity of working liquid.With the increase of conductivity of working liquid,brass surface roughness is decreased firstly and then increased,where the minimum value is 1.63μm.The machining surface exhibits concave,irregular drop with tiny holes,ball drop,electrolytic pinhole and micro crack,which are different distribution with different conductivity of working liquid.Because the recast layer without Mo element,the molybdenum wire presnts nearly without melting loss.Oxygen content is increased with the increase of the conductivity of working liquid.关键词：HSWEDM;Conductivity of the Working Fluid;Brass;Surface Quality
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发布时间：2023-12-18 - 摘要：Effects of electroslag remelting on as-cast microstructure and mechanical properties of Cr20Ni80 ingot were investigated by analyzing comparatively cross section’s macrostructure,inclusions,mechanical properties of ingots before and after ESR.The results reveal that the range of columnar crystal zone in big end,and small end as well as fine grain zone at small end is extended after ESR.The columnar crystal zone is one half of the radius in the big end and the crystal grain exhibits a certain degree of roundness in the small end after ESR.SEM analysis shows that there exist 5types of inclusions in the ingot and absence of new inclusion after ESR.By analyzing the amount and size of inclusions in the ingot before remelting,it is found that the main mechanism for inclusion segregation in the bottom of the ingot is the capturing of large inclusions by showering crystallites during floatation.Area ratio of inclusions in the ingot is decreased by 48.3% with more uniform distribution of inclusion,where plasticity is improved bu 89times,and toughness is increased by 56times after ESR.关键词：Cr20Ni80 Alloy;Electroslag Remelting;Inclusion;Macrostructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：<正>近日,东旭光电在北京举办石墨烯基锂离子电池产品发布会,推出世界首款石墨烯基锂离子电池产品——"烯王"。发布会上,东旭光电不仅与泰州市新能源产业园区管委会签订"烯王"生产线落地协议,还与美国凯途能源公司等下游应用端厂商签订研发及产业化合作战略协议。此外,东旭光电投资负责人、上海碳源汇谷董事长王忠辉和上海交通大学电子信息与电气工程学院副院长王延峰为新成
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发布时间：2023-12-18 - 摘要：<正>澳大利亚联邦科学与工业（澳联邦科工）研究组织近期宣布,该机构开发出一种新的金属镁冶炼技术,可使金属镁的制备过程节省多达80%的能源,并减少多达60%的一氧化碳排放,有望使金属镁制造业重现活力。镁是一种具有重要应用价值的轻金属,是航空工业的重要材料,可用于制造飞机机身、发动机零件等,但因为冶炼成本较高限制了应用范围。澳联邦科工组织发表公报称,这项新的冶炼技术被称作"镁音速",它通过碳对镁矿的热还原反应以及被称作"超音速喷嘴"
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发布时间：2023-12-18 - 摘要：<正>金属空气电池因其原材料丰富、能量密度高、轻便、安全环保等优点,被称为最具开发前景的绿色能源之一。寻找高性价比的氧还原催化剂是开发金属空气电池的关键难题,也是制约金属空气电池在电动汽车等领域广泛应用的"瓶颈"。日前,南开大学王卫超教授、美国休斯敦大学姚彦教授联合研究团队,成功将锰基莫来石材料作为催化剂应用于镁空气电池。相较于传统贵金属催化剂,该材料使成本大幅降低,且可在中性电
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发布时间：2023-12-18 - 摘要：<正>意大利意特佩雷斯-高斯（Italpresse-Gauss）是一家国际知名的轻合金铸造设备提供商,由意特佩雷斯（Italpresse）公司和高斯（Gauss）公司组成。意特佩雷斯（Italpresse）成立于1969年,专业提供高性能压铸机及其自动化压铸单元。高斯（Gauss）成立于1967年,致力于提供重力铸造机、低压铸造机以及其自动化过程的周边设备和机器人。在刚刚闭幕的第十一届中国国际压铸展览会（CHINA DIECASTING 2016）上,意特佩雷斯-高斯（Italpresse-Gauss）旗下的意特佩雷斯压铸
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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,为推动通过并购重组实现外延式发展,实现从汽车零部件延伸至整车、新能源汽车等领域的产业战略布局,拟以现金24 000万元收购广东宝龙汽车有限公司（"宝龙汽车"）60%股权。广东鸿图拟与宝龙汽车及其股东签署《股权转让协议》,各方同意标的公司整体估值按照4亿元的价格,前者
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发布时间：2023-12-18 - 摘要：<正>由华中科技大学机械学院张海鸥教授主导研发的一项金属3D打印技术"智能微铸锻",在3D打印技术中加入锻打技术,能生产结实、耐磨的金属产品,打破了3D打印行业存在的最大障碍,有望开启人类实验室制造大型机械的新篇章。传统机械制造中,浇注后的金属材料不能直接加工成高性能零部件,必须通过锻造改造其内部结构,解决成型问题。但是对超大锻机的过度依赖,导致机械制作投资大、成
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发布时间：2023-12-18 - 摘要：<正>在当前石墨烯备受关注和热捧的背景下,我国整个石墨市场供求与行业发展走势如何?在8月15日16日将于长沙举办的2016年中国石墨深加工产业高峰论坛。此次论坛的主题是"供给侧价值链、新技术、新领域"。据主办方——石墨邦、中国非金属矿工业协会石墨专业委员会和中国炭素行业协会介绍,论坛将重点关注石墨产业产能过剩给行业发展带来的影响,以及整个行业供给侧结构性改革的现状,并就如何推进传统石墨产业升级改造、打造石墨深加工产品价值链进行广泛探讨。同时,石墨领域的新技术以及高端应用新领域也是
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发布时间：2023-12-18 - 摘要：<正>近日,史杰克西公司宣布成立全新的铝铸件热处理业务单元。新业务部门将由一支热处理专业团队组成。新业务单元成立后,史杰克西集团将为客户提供一系列针对结构铸件的铝铸件热处理系统和产品载具。新业务将由BPR-Engineering GmbH公司创始人Frank Herkenrder及其专业团队领衔。随着市场日益青睐采用热处理技术优化铝铸件的力学性能,此次收购也是史杰克西为响应
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发布时间：2023-12-18 - 摘要：<正>近日,美国镁回收和再生合金生产商先进镁业合金公司（Amacor）称,他们双线工厂的第二条生产线开始试运行,产能从2.5万t升至5万t。Jan Guy称该工厂从2001年启动时就安装了两条生产线,之后几年都是两条线交替使用,第二条线上一次运行是两年前。按照计划,该条线十月进入热调试状态,并在年底前投入运营。第二条线将与第一条线生产相同的产品,包括ASTM规格的压铸合金以及用于铝合金的特殊化学物质。同时新的生产线还将进行废料来料加工,目前主要消费领域如压铸市场和铝市场的需求在不断增长,因此增开第二条线是非常必要的。2017年
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发布时间：2023-12-18 - 摘要：<正>日前,哈尔滨工业大学化工与化学学院青年教师王博在电化学混合储能领域的研究取得新进展,只需充电200s,充电率可达90%。这是基于一种构建多级结构"双连续活性通道"（离子与电子）混合储能材料的策略。据了解,目前广泛使用的锂离子电池、铅酸电池、电容器等化学电源,其电极的活性物质普遍采用单一的电化学储能材料。这些电源的性能受限于电极中单一活性物质的
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发布时间：2023-12-18 - 摘要：<正>近日,湖北省科技厅组织专家组在武汉召开了由武汉理工大学承担的国家国际科技合作重点专项"高性能纳米线钒系锂离子动力电池联合研发"项目验收会。该项目面向清洁高效能源的可持续发展,通过与哈佛大学开展合作,建成了单次百千克级纳米线钒系正极材料中试线和自动化电子生产线,完成了纳米线钒系动力电池的装配和装车实验,进行了电动汽车示范运行,对我国发展清洁高效能源系统产生了积极影响。此项目的成功验收是钒电池在电动汽车领域的重大突
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发布时间：2023-12-18 - 摘要：<正>国务院办公厅日前印发《关于营造良好市场环境促进有色金属工业调结构促转型增效益的指导意见》（以下简称《意见》）,就今后一个时期营造良好市场环境,促进有色金属行业转型升级、实现持续健康发展作出部署。《意见》指出,要以解决有色金属工业长期积累的结构性产能过剩、市场供求失衡等深层次矛盾和问题为导向,优化存量、引导增量、主动减量,化解结构性过剩产能,促进行业技术进步,扩大应用消费市场,加强国际产能合作,创造良好营商环境,推动有色金属工业调结构、促转型、增效益。要坚持市场主导、政府引导、创新驱动、分类指导的原则,优化有色金属工业产业结构,实现
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发布时间：2023-12-18 - 摘要：<正>苏州春兴精工股份有限公司（"春兴精工"）拟以3亿元收购惠州市泽宏科技有限公司（"泽宏科技"）的100%的股权。泽宏科技主营加工、销售五金制品,尤其在阳极氧化和高光技术加工方面优势突出。春兴精工公告称,其已于7月14日与泽宏科技的股东深圳德兴隆投资有限公司及江登山签署了《股权转让框架协议》。泽宏科技估值为3亿元,春兴精工按照估值的收购标的公司股东100%股权。资料显示,泽宏科技成立于2015年3月,位于广东惠州博罗县,主营业务包括对五金制品、塑胶制品的喷砂拉
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发布时间：2023-12-18
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