最新刊期
卷 36 ， 期 7 ， 2016
- 摘要：The mechanical properties of the die castings is greatly related with the cavity vacuum.The performances of the die castings prepared under different vacuums which was subject to T1,T5 and T6heat treatment were investigated.The results indicate that the elongation of the castings fabricated by high vacuum die casting（cavity vacuum of 9194kPa）is 2.3times of ones fabricated by high pressure die casting;after T1 treatment,compared with that of ones fabricated by low vacuum die casting（cavity vacuum of 6570kPa）,yield strength of the high vacuum die casting specimen is increased by 64.2%,and the elongation of the specimen produced by high vacuum die casting（HVDC）reaches 8.4% with T5 treatment.After T6 treatment,the yield strength and elongation of the HVDC castings reach 339.8MPa and 6.7%,respectively.关键词：Cavity Vacuum;Heat Treatment;Mechanical Performance
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发布时间：2023-12-18 - 摘要：SiCp/Al composites with different SiCp volume fraction were prepared by hot pressing sintering combined with hot extrusion.The microstructure and mechanical properties of SiCp/Al composites were investigated by means of SEM（scanning electron microscopy）,TEM（transmission electron microscopy）and XRD（X-ray diffraction）,and the fracture morphology of the composites prepared was observed.The results show that,with the increase of SiC volume fraction,the relative density of the composites prepared is gradually decreased,however,it is more than 98%,and the grain size of SiCp/Al composites with different SiCp volume fractions is at submicron grade,which reveals that the high density of nano SiCp/Al composite can be obtained by hot extrusion.The tensile strength and yield strength of the extruded and as annealed SiCp/Al composite are the higher than those of pure Al,while the elongation is the lower than that of ones.Annealing treatment has little effect on the strength of extruded SiCp/Al composites,and with the increase of the volume fraction of SiC particles,the effects of annealing treatment on plasticity of the composites are weakened gradually.关键词：Nano SiCp/Al Composites;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：A stainless steel FeCrMoAlWCu with the higher Mo contents and lower Al contents than the conventional Fe-Cr-Al-Mo steels was developed by evaluating its structural stability,corrosion resistance and oxidation resistance as well as mechanical properties.The results show that a stable BCC structure can be observed in the stainless steel.The steel exhibits the satisfied corrosion resistance in 3.5%NaCl solution,and the pitting corrosion potential is about 0.915 Vat 25 ℃,which is equivalent with that of 00Cr26Ni6Mo4 CuTi.The Fe65.6Cr23.6Mo5.3Al2.7W2Cu0.8steel exhibits excellent oxidation resistance in air at 1 100℃,and its weight increase per unit area is about 0.428 4g/m2 after oxidized for100 h,which is superior to that of Cr23Al5 alloys.关键词：Stainless Steel;Corrosion;Oxidation
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发布时间：2023-12-18 - 摘要：The effects of solution treatment on the mechanical properties and microstructure of 309 S stainless steel plate were investigated by OM（optical microscopy）,SEM（scanning electron microscopy）,room temperature tensile and micro-hardness test.The results show that the volume fraction of ferrite phase in the 309 Ssteel is obviously reduced from 11.6% to 7.3% after solution treatment.The increase of solution temperature and time can be beneficial for both the dissolution of carbide and austenite grain growth.In addition,strength and micro-hardness of the 309 Sstainless steel are decreased with increasing in hold time.With solution at 1 100℃for 20 min and then water cooling,the yield strength,ultimate tensile strength,micro-hardness and elongation of the 309 Sstainless steel reach 259.71 MPa、575.31 MPa、178.7 HV0.2 and 58.4%,respectively.The fracture of the specimen is characterized by ductile dimple,and toughness of the specimen after solution treatment is better than that of the hotrolled sheet.关键词：309S Stainless Steel;Solution Treatment;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：Effects of HIP on microstructure and mechanical properties of ZL114 Aalloy castings were investigated by analyzing comparatively the tensile behavior,fatigue behavior and microstructure defects before and after HIP treatment.The results reveal that the tensile strength,elongation and fatigue of the ZL114 alloy parts after HIP treatment are increased by 4.8%,144% and 98%,respectively,which is attributed to the elimination of shrinkage porosity and fine gas hole in the parts by HIP.关键词：HIP;ZL114AAlloy;Castings
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发布时间：2023-12-18 - 摘要：Ni-based alloy coatings were fabricated on H13 steel substrate by Nd∶YAG laser cladding methods.The microstructure,phase constitutions and wear resistance of the coating were investigated by means of scanning electron microscope（SEM）,energy dispersive spectrometer（EDS）,X-ray diffraction（XRD）and abrasion testing machine.The results reveal that,Ni-based alloy coating is dense with absence of obvious holes and cracks,which is mainly composed of fine dendrites and eutectics.The dendrites are composed ofγ-Ni,and the eutectic crystal is composed of M23C6,M7C3,Ni3 Fe,Ni3B.Compared with other regions of coating,the grain size of surface is the finer and the grain orientation disappears.The average microhardness of Ni-based alloy coating reaches 708.4 HV0.2,which is 1.60 times higher than that of quenched and tempered H13 steel.With the increase of load and sliding speed of abrasion testing machine,the wear resistance of the coating is superior to that of H13 steel.In process of wear,the wear of coating exhibits mainly abrasive wear accompanied with a small amount of adhesive wear,while the H13 steel wear is mainly characterized by adhesive wear accompanied with a small amount of abrasive wear.关键词：H13 Steel;Laser Cladding;Ni-Based Alloy Coating;Microstructure;Abrasion Resistance
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发布时间：2023-12-18 - 摘要：The effects of brazing temperature on the microstructure and properties of the Babbitt metal/steel matrix were investigated.The results show that the tin based Babbitt alloy and steel substrate with good bonding can be observed by brazing.With increasing in brazing temperature,dendritic structure in a vertical to the interface growth is generated,and grains in Sn matrix Babbitt alloy is coarsened up,so the weld microhardness of tin based Babbitt alloy/steel substrate region is increased firstly and then decreased.With the brazing temperature of 320340℃,the micro hardness of the alloy reaches141.3146.2HV,meanwhile,the migration of Fe and Sn can be observed in brazing process,and Cu is enriched in the transition layer.关键词：Babbitt Metal;Brazing;Brazing Temperature;Microhardness;Microstructure
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发布时间：2023-12-18 - 摘要：The effects of trace Sb element addition on microstructure and mechanical properties of Mg-2.7Nd-0.4Zn-0.5Zr as cast alloy were investigated by using optical microscope,SEM,XRD and tensile testing.The results show that Sb element can refine significantly the grains and improve the morphology of eutectic phase,leading to the improvement of the strength of alloy.The as-cast microstructure of Mg-2.7Nd-0.4Zn-0.5Zr-0.08 Sb alloy is composed ofα-Mg solid solution and Mg12 Nd phase.Sb element is distributed mainly in the interface of second phase and matrix.关键词：Mg-Nd-Zn-Zr Alloy;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The temperature control for medium frequency induction furnace has serious lag phenomenon.The traditional PID temperature control is easy to lead to a large overshoot and long adjustment period in temperature control and other problems.Through using improved Smith compensation control system,the pure time-lag effect on the control system can be eliminated.MATLAB simulation shows that the temperature control becomes more accuracy and smooth.The response time for system adjustment to steady state can be shorten.The overshoot volume is decreased obviously in control process.System anti-interference performance and robustness are further improved,so the parameters meet the medium frequency induction furnace temperature in control system.关键词：Medium Frequency Induction Furnace;Temperature Control;Smith Compensate;MATLAB
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发布时间：2023-12-18 - 摘要：Riser design is an important part of casting process design.According to the casting feeding principle,the riser optimization model was established.Take cylindrical open top riser for example,riser parameters,such as riser diameter,riser height,riser neck diameter and riser neck height,were optimized by using the IPOPT algorithm.On the precondition of casting quality,the riser optimization volume can be reduced by 12.634 5% compared with the volume calculated by the modulus algorithm.关键词：IPOPT Algorithm;Riser Design;Riser Size Optimization;Modulus Algorithm
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发布时间：2023-12-18 -
Numerical Simulation and Parameters Optimization of Casting Process of Large HBW160 Machine Tool Bed
摘要：On the basis of initial casting process of HBW160 machine tool bed,the filling and solidification process was simulated by the AnyCasting software,and the optimized process parameters of the machine tool bed were presented through orthogonal experiment and numerical simulation.The results reveal that the pouring temperature is the main effect factors,followed by the chill thickness and filling velocity.The probability of the shrinkage is reduced to the lowest when the pouring temperature is 1 350℃ with the filling speed of 1.78m/s,and the chill thickness of 70 mm.关键词：Casting;Numerical Simulation;Orthogonal Experiment;Shrinkage Holes- 2
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发布时间：2023-12-18 - 摘要：The cooling stave with elliptic water pipes was produced by lost foam casting（LFC）and experimented by thermal test,and influence of furnace gas temperature and water velocity were analyzed.The thermal properties of the round water pipes and elliptic water pipes of cast iron cooling stave were analyzed comparatively,and based on the heat transferring theory,the coefficient of heat transfer between cast iron cooling stave and furnace gas was calculated.Finally,the numerical simulation was verified by experimental results.The results show that the gas temperature has great influence on temperature of stave body,and at the same furnace gas temperature and water condition,the heat transfer performance of cooling stave with elliptic water pipes is superior to that of the round water pipes ones.In addition,numerical simulation calculation is well agreement with thermal test ones.关键词：LFC;Cast Iron Cooling Stave;Elliptic Water Pipes;Thermal Test;Numerical Simulation
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发布时间：2023-12-18 - 摘要：The latest research progress in the solidification of monotectic alloy in magnetic fields was reviewed.The experimental results and limits of the solidification of monotectic alloy in magnetic fields were summarized.Steady magnetic field of more than 10 T magnitude can generate larger Lorentz force and magnetization force,which evidently restrain the macro-segregation of the monotectic alloy solidification.Compound electromagnetic fields can restrict greatly the serious macro-segregation of the monotectic alloy solidification,and can also promote a layered monotectic alloy to fusion,but only under the appropriate parameters,composite magnetic field can make alloy blend effect well.The future development on the solidification of monotectic alloyunder magnetic field of more than 10 Tmagnitude was presented.关键词：Magnetic Field;Monotectic Alloys;Macrosegregation;Dispersed Phase;Microstructure
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发布时间：2023-12-18 - 摘要：Semi-solid 7075 aluminum alloy billets were prepared by recrystallization and partial remelting（RAP）technology.The influences of heating temperature and holding time on microstructure evolution were investigated.The results show that the fibrous microstructure in as-extruded 7075 aluminum alloy is transformed into semi-solid granular ones after heating treatment.As increasing in the heating temperature and holding time,the as-extruded microstructure gradually disappears,and the granular grains are generated and grown through recrystallization process.The size of semi-solid granular microstructure is increased with the increase of heating temperature and holding time.Under the experimental conditions,the semi-solid microstructure heated at a higher temperature with short time is the more homogeneous than that of ones heated at a lower temperature with long time.Based on experimental analysis,the satisfied semi-solid 7075 aluminum alloy billets by RAP method can be fabricated with heating at 600℃for 5min.关键词：7075 Aluminum Alloy;Semi-solid;Recrystallization and Partial Remelting Method（RAP）;Structure Evolution
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发布时间：2023-12-18 - 摘要：For the purpose of improving the environment and reducing costs,piston lubricant for die casting was replaced from liquid G275 to the solid LUBEWAXTM 500.However,there exists broken cake during the initial evaluation of the product.Through a comparative analysis of lubricity and cooling properties between the two piston lubricants,combining with production status and past experience,series of countermeasures,such as checking mold,piston and barrel’s cooling water and ensuring smooth,as well as changing the barrel style,the problem of cake broken was solved.Finally,the LUBEWAXTM 500 particles piston lubricants was imported successfully.关键词：Lubricating Oil;LUBEWAXTM 500;Plunger;Barrel
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发布时间：2023-12-18 - 摘要：For 4 0008 000 kN die-casting machine,the track of elliptical instrument is used as the structure of the second half of the circle to design connecting-rod manipulator,with no interference from the casting room of the die-casting machine or the equipments around,so as to achieve automatic extraction of horizontal linear movement.It is used together with the automatic welding of the linear track of diecasting machine and spray manipulator,characterized by large stroke,high speed,good rigidity,large load and small volume.关键词：Manipulator;Connecting Rod;Linear Track;Die-casting Machine
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发布时间：2023-12-18 - 摘要：Effect of carbon fiber content of the SLS mold on grain size of ZL205 Aalloy produced by vacuum counter-pressure casting were investigated through testing and analyzing the grain size subjected to different carbon fiber content.The results indicate that the grain size in aluminum alloy is refined greatly with the increase of carbon fiber content,however,the carbon fiber content is more than 3%,the grain size is increased with the increase of carbon fiber content.At the same carbon fiber content,the grain size is increased with the increase of the sample thickness.Meanwhile,the relationship of the grain size of vacuum counter-pressure casting ZL205 Aaluminum alloy with carbon fiber content and sample thickness was established.When the sample thickness is more than 9 mm,effects of sample thickness on grain size is obvious,however,the sample thickness is less than 9mm,effect of carbon fiber content on grain size is the major.关键词：Carbon Fiber;Precoated Sand;Vacuum Counter-Pressure Casting;ZL205AAlloy;Microstructure
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发布时间：2023-12-18 - 摘要：Aiming at the serious shrinkage cavity and porosity appeared in the process of investment casting bonnet,the bonnet casting process was simulated by the MAGMA software.On the basis of the original process,by changing the pouring process,the optimized process of investment casting bonnet was presented.The shrinkage cavity and porosity defects in the bonnet were improved effectively,meeting the technological requirements.关键词：Investment Casting;Magma Software;Numerical Simulation;Shrinkage Cavity and Porosity
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发布时间：2023-12-18 - 摘要：The torque converter for forklift truck has complex structure,belonging to typical complex thin walled box castings.Lost foam casting can reduce machining allowance to realize the accuracy molding.Rational design of lost foam mould and processing can realize the satisfied dimensional accuracy and surface roughness.关键词：Torque Converter;Lost Foam Casting;Distortion
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发布时间：2023-12-18 - 摘要：The sump is easily generated in aluminum alloy during semi-continuous casting process due to varied cooling rate and un-even temperature distribution.By measuring depth of the sump and analyzing microstructure of aluminum ingots cut from 1/4 section a macro position,effects of sump on the performance of aluminum ingot were analyzed.The results reveal that power ultrasound effect is restricted with the sump depth increase.In addition,sump exhibits holding role for ultrasonic power treated liquid aluminum.A small crucible experiment reveals that with increasing in holding time,ultrasonic power effects can be weakened gradually,and sump depth has the obvious role in microstructure at center of the aluminum ingot.关键词：Sump;Microstructure;Power Ultrasound;Holding
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发布时间：2023-12-18 - 摘要：Effects of TiO2 content on coating quality were investigated in process of preparing ceramic coating by SHS gravity separation.The results show that the ceramic layer is composed of Al6Si2O13,FeAl2O4,FeTiO3 and Ti3O5,Al2O3.To obtain a complete and uniform thickness of coating,the amount of TiO2 in the reaction system should be controlled less than 10%.With the increase of TiO2 content in the reaction system,the reaction rate becomes slow,and the thickness of the ceramic coating is increased,meanwhile,the apparent porosity is decreased,and the volume density is increased.With the increase of the amount of TiO2,the bonding strength of the coating with the substrate is increased gradually,reaching a maximum value at 8%,and then decreased obviously.关键词：SHS Gravity Separation;Phase Composition;Thickness;Density;Bonding Strength
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发布时间：2023-12-18 - 摘要：Carbon fiber reinforced aluminum matrix composites with uniform fiber distribution were prepared by ultrasonic vibration method.The effects of vibration time and parameters on mechanical properties of the composites prepared were investigated by scanning electron microscope（SEM）and electronic universal testing machine.The results show that ultrasonic vibration is obviously helpful for the filling of carbon fibers with molten aluminum completely.And the tensile properties are increased with the increase of vibration time.With the vibration time increasing from 10 sto 30s,the tensile strength of carbon fiber reinforced aluminum matrix composites is increased from 105 MPa to 130 MPa.关键词：Carbon Fiber Reinforced Aluminum Matrix Composite;Vibration;Tensile Strength
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发布时间：2023-12-18 - 摘要：In situ Al3Ti particle reinforced 2024 Al alloy matrix composites（Al3Ti/2024Al）were prepared by ultrasonic casting.Effects of in-situ Al3Ti particle content on the microstructure,hardness,tensile performance and wear resistance of Al3Ti/2024 Al composites were investigated.The results indicate that with the increase of Al3Ti content,grain in the composites prepared is refined gradually.When the Al3Ti content is more than 12%,the density of the composites is decreased significantly.The hardness of the matrix and composites is increased with the increase of Al3Ti content.The yield strength and tensile strength of Al3Ti/2024 Al with 8% Al3Ti composites reach 357 MPa and 446 MPa,improved by 38.5% and 39.8% compared with those of as cast 2024 Al alloy,respectively.The wear resistance of the composites prepared is increased with increasing in Al3Ti content.关键词：Ultrasonic Casting;In-situ Al3Ti Particle;Al Matrix Composites
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发布时间：2023-12-18 - 摘要：The double hot compression simulation of TB8 titanium alloy was carried out on the thermal simulation machine to understand effects of deformation temperature and strain rate of double hot compression on microstructure.The results show that,there exists equiaxed structure after obvious dynamic recrystallization with hot deformation in single phase region at 845 ℃.Grain size is refined obviously after deformation.Recrystallization content is decreased and brokenβgrain boundary can be observed with the increase of strain rate.The microstructure presents inhomogeneous deformation in dual phase region at 805 ℃,and large number of brokenαphase with poor uniformity can be observed.The change of microstructure can be ignored with increasing in strain rate with presence of banded structure.There exists equiaxed structure and banded structure after hot deformation crossing single phase region to dual phase region.Deformation temperature is more sensitive to strain rate of banded structure.关键词：TB8 Titanium Alloy;Double Hot Compression;Banded Structure;Equiaxed Microstructure
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发布时间：2023-12-18 - 摘要：Based on the three-dimensional elastic-plastic thermo-mechanical coupled finite element method,the warm rotary stretch bending process of thin-wall multi-ribs AZ31 magnesium alloy profile was simulated.The effects of temperature on forming property of the profile were investigated.The results show that with the temperature increase,the equivalent stress is decreased and the equivalent plastic strain is increased.The various specification magnesium alloy profile can be formed by rotary stretch bending effectively between 110 ℃ and 220 ℃.The springback angle is decreased from 2.42°of 110 ℃to 1.56°of 220 ℃.The distortion outside of the bent profile is increased and the inside one is decreased simultaneously.关键词：Thin-wall Multi-ribs Profile;Rotary Stretch Bending;Numerical Simulation
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发布时间：2023-12-18 -
Effect of Al-5Ti-1B and Sm Compound Modification on the Microstructure and Properties of ZL114 Alloy
摘要：The effects of Al-6Ti-1B master alloy and Sm compound modification on microstructure and mechanical properties of ZL114 alloy were investigated.The results show that with the increase of Sm addition,the secondary dendrite arm spacing of the primaryα-Al phases,the aspect ratio of the mean area and average ratio of length to diameter of the eutectic phases are decreased firstly and then increased,while the tensile strength and hardness are increased firstly and then decreased.With the 0.07% Sm addition（Al-5Ti-1Baddition is fixed at 1%）,the refining and modifying effect exhibit desirable,where the secondary dendrite arm spacing of the primaryα-Al phases,the aspect ratio of the mean area and average ratio of length to diameter of the eutectic phases are 11.24μm,3.47μm2 and 2.53,respectively,meanwhile,the tensile strength and hardness reach 225 MPa and 63.2（HV）,respectively.关键词：Sm;ZL114 Alloy;Composite Modification;Grain Refining- 2
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发布时间：2023-12-18 - 摘要：Effects of P modification,P-Sb compound modification and Mg content on microstructure of Al-Si alloy were investigated.The results show that the size of primary Si is decreased from 40μm to 20μm and the length of eutectic Si is decreased from 20μm to 12μm with more uniform distribution after P modification,so both tensile strength and yield strength of the P modified alloy are increased approximately 15%.The size of primary Si is decreased to 5μm,and dendrite size ofα-Al is obviously refined after P-Sb compound modification,meanwhile,the shape of eutectic Si appears wormlike,so tensile strength and yield strength of the alloy are increased about 8% compared with those of the alloy with P modification.With the increase of Mg content,the Sb modification effect is promoted,where the shape of eutectic Si appears with absence of primary Si and refinement of dendrite size ofα-Al,so tensile strength and yield strength of the alloy are increased about 3% compared with those of ones with P-Sb modification.关键词：Al-Si Alloy;P-Sb Compound Modification;Mg Content;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：Effects of Ca addition（0.1% 0.5%）on solidified structure and mechanical properties of AZ91 magnesium alloy were analyzed by OM（optical microscopy）,XRD（X-ray diffraction）and SEM（scanning electron microscopy）.The results show that primary phase in the AZ91 alloy is coarsened with adding trace Ca.With the increase of Ca addition,change of primary phase can be ignored,however,second phase is refined firstly and then coarsened,where secondary phase size exhibits desirable with0.4% Ca addition.Al2 Ca phase can be found with 0.5%Ca addition.The solid-liquid transition temperature range of the alloy becomes narrow,and the eutectic transition temperature is increased with adding0.4%Ca.With the increase of Ca addition,mechanical properties of the AZ91 magnesium alloy are increased.Comprehensive mechanical properties exhibit satisfied when Ca addition is 0.4%,where tensile strength and elongation of the alloy reach 261 MPa and 14.8%,increased by 51% and 691%,respectively,compared with the alloy with absence of Ca addition.关键词：Ca;AZ91Magnesium Alloy;Solidified Structure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The effects of isochronal aging treatment on compressive strength and energy absorption behavior of the Al-0.16Sc-0.08 Zr foams with homogeneous pore structure and porosity of 71.5% 72.5%,which was fabricated by melt-foam method,were investigated.The results show that the foams exhibit homogeneous spherical pore structure with pore size approximately 0.9mm.Due to trace Zr content,the absence of primary Al3（Zr,Sc）phase in the matrix can be observed.The compressive strength of the alloy foams is increased firstly and then decreased with increasing in temperature during isochronal aging between 200 ℃ and 600 ℃.The sample shows the desirable compressive strength and energy absorption capacity with aged at 400 ℃.The heat treatment can lead to the decrease of the cell-wall plasticity,which is beneficial for the energy absorption efficiency and the peak stage prolonging.The microstructure observation of the cell wall at 400℃shows the precipitation of nano-size Al3（Sc,Zr,Ti）particles existing coherent with Al matrix with a radius of 2.94.8nm.These Al3（Sc,Zr,Ti）particles can inhibit the grain boundary sliding and dislocation movement,strengthening the cell walls and improving the compressive strength as well as energy absorption behavior of the foams.关键词：Cellular Al Alloy Foams;Compressive Behavior;Energy Absorption;Nano-Size Precipitates
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发布时间：2023-12-18 - 摘要：The effects of Zn on the hot cracking tendency（HCT）of Mg-Zn binary alloys were analyzed according to the variation of cooling temperature,free contraction displacement and hindered shrinkage stress of the three Mg-Zn binary alloys（with 2%,6%and 10% Zn content,respectively）tested by the special designed equipment which could measure and record the subtle changes of temperature,displacement and stress during solidification process.The parameters for evaluating HCT including stress accumulating coefficient and its corresponding solid fraction range,and the maximum linear shrinkage percentage in free linear shrinkage process,were presented.The results indicate that the HCT of Mg-Zn binary alloy is decreased with the increase of Zn content below the maximum Zn solid solubility range,while the HCT of hypoeutectic Mg-10 Zn alloy exhibits the characteristic of cold crack with the Zn content exceeding its maximum solid solubility.关键词：Mg-Zn Binary Alloy;Solidification;Thermal Shrinkage
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发布时间：2023-12-18 - 摘要：<正>6月23日,由中国工业经济联合会、中国机械工业集团有限公司和苏州市人民政府共同主办,苏州工业园区管理委员会协办,中国工业经济联合会高端材料与先进制造协同创新业务平台、中国汽车工业国际合作有限公司与苏州国华展览有限公司联合承办的"首届中国国际高端材料与先进制造协同创新博览会暨高峰论坛"在北京市钓鱼台国宾馆举行了新闻发布会。制造业是国民经济的主体,是立国之本、兴国之器、强国之基。为推进我国由制造大国向制造强国的历史性转变,明确制造
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发布时间：2023-12-18 - 摘要：Effects of different heat treatments on microstructure and properties of Cu-Co-Si-Zr frame alloy prepared by vacuum melting condition were investigated by hardness tester,electric conductivity and tensile testing,metallograph.The results show that the characteristics of aging strengthening exists in the alloy obviously.The electrical conductivity and hardness can reach 27.78MS/m and 198.2HB,respectively,with aging at 510 ℃for 3hand solid solution at 980 ℃for 2h.关键词：Cu-Co-Si-Zr Alloy;Solution Treatment;Aging Treatment;Hardness;Electrical Conductivity
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发布时间：2023-12-18
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