最新刊期
卷 39 ， 期 1 ， 2019
- 摘要：The as-cast LZ61magnesium-lithium alloy was fabricated by smelting.The hot compressive deformation behavior and effects of deformation temperature and strain rate were analyzed.Meanwhile,the constitutive equation was established.The results show that the strain rate sensitivity index of the alloy is m=0.218,and the average hot deformation activation energy is Q=99.21kJ/mol.The rheological curves of the alloys are characterized by dynamic recrystallization,and the flow stress is decreased with increasing in temperature and decreasing in strain rate.Temperature and strain rate have a significant effect on the dynamic recrystallization of the alloy.Changes in the microstructure confirm the occurrence of dynamic recovery and dynamic recrystallization.The ascast alloy consists ofβ-phase dispersedly distributed on theα-phase matrix and grain boundaries.After thermocompression,at the same temperature,as the strain rate decreases,the microstructure is changed from heterogeneous grains to fine uniform recrystallized grains.At the same strain rate,as the temperature increase,the recrystallized region is increased gradually and the grains are refined remarkably.关键词：LZ61Alloy;Hot Compression Deformation;Activation Energy;Constitutive Equation;Microstructure
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发布时间：2023-12-18 - 摘要：The Fe67-xNb5B28Cux（x=0.5,1.0,2.0）（atomic fraction,%）amorphous ribbons have been prepared successfully by melt-spinning.The influences of Cu content on thermal stability and electrical resistivity were investigated by X-ray diffractometer（XRD）,differential scanning calorimetry（DSC）and four-point tester.The results indicate that the crystallization process is directly related with Cu content,where with the increase of Cu content,the glass forming ability and thermal stability are decreased in the Fe67-xNb5B28Cux alloys.The Fe66.5Nb5B28Cu0.5glassy alloy exhibits the excellent GFA and high thermal stability,in which the values ofΔTx and Tx1are equal to 39Kand 929K,respectively.The electrical resistivity of the Fe67-xNb5B28Cux glassy alloys reaches 119～138μΩ·cm.The Fe67-xNb5B28Cux glassy alloys show a correspondence between electrical resistivity and GFA.关键词：Fe-based Glassy Alloy;Glass Forming Ability;Thermal Stability;Electrical Resistivity
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发布时间：2023-12-18 - 摘要：The molybdenum bar billet with diameter of 85 mm was prepared by cold isostatic pressure and sintering.Then the molybdenum bar with diameter of 32 mm was forged by different forging ways,and its microstructure and mechanical properties were tested comparatively.The results show that some parameters,such as the tempering temperature,tempering time,times of tempering and deformation rate in the forging process have effects on the microstructure and properties of the molybdenum bar after forging.The forging processing parameters were presented as follows:before forging,the blank of molybdenum bar kept at 1 200℃for 120 min.After that,the molybdenum bar was forged for six times.After each forging,the diameter deformation of molybdenum bar billet reached 10%to 20% of that before forging.During the whole forging process,intermediate tempering was carried out every two times.The temperature and time of intermediate tempering were 1 100℃for 15 min,respectively.Finally,the tensile strength and elongation of the molybdenum bar with fine and uniform structure reach 667 MPa and 26%,respectively.关键词：Molybdenum Rod;Forging;Tempering;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The texture evolution of Cr-Al ferritic stainless steel during annealing treatment was observed.The recrystallization behavior and texture evolution were characterized by EBSD technique and analyzed quantitatively using HKL Channel.The plastic-strain ratio r value was tested.The results indicate that most of the recrystallization process occurs with annealing time less than 10 min.The recrystallization fraction is increased from 3.5%to89% with annealing time from 2min to 10 min.When further holding treatment,the recrystallization behavior keeps stable.The texture is mainly{hkl}<110>type when annealing time is less than 10 min,and it is{111}<uvw>type with annealing time more than 10 min.The r vale reaches the peak value of 1.27 when annealing time is 30 min,exhibiting the desirable formability.关键词：Ferritic Stainless Steel;Texture;Plastic-Strain Ration Value;Annealing Time
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发布时间：2023-12-18 - 摘要：A certain amount of aluminum alloy cold-rolled scrap was added to the electrolytic aluminum liquid,and the ceramic foam plates with the filtering precision of 50ppi+50ppi and 50ppi+60ppi were adopted for filtration and purification,respectively.The effects of two kinds of on-line filtration and purification process on the microstructure and mechanical properties of 1235 aluminum alloy casting-rolling plates were analyzed by means of microstructure analysis such as optical microscopy（OM）,scanning electron microscope（SEM）,energy spectrum analyzer（EDS）.The results show that the ceramic foam filter plate with filtering precision of 50ppi+60ppi can reduce significantly the content of impurities in the melts,and improve obviously the purity and cleanliness of the melts.Compared with the ceramic filter plate with the filter precision of 50ppi+50ppi for on-line filtration,the number of large or cluster irregular inclusions was reduced greatly,and the pores and cracks in the microstructure were also reduced.Energy dispersive spectroscopy（EDS）analysis shows that the inclusions after improving the filtration process are mainly composed of Al,O,Fe and Si,which may be a compound inclusion composed of Al2O3 and AlFeSi intermetallic compounds.关键词：1235 Aluminum Alloy;Casting-rolling Plate;Melt Purification;Microstructure;Inclusions
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发布时间：2023-12-18 - 摘要：Cu-20 Pb hypomonotectic alloys were prepared under normal conditions and the electromagnetic microgravity+pulse current compound field,meanwhile,the microstructure,microhardness and anti-friction properties of hypomonotectic alloys were analyzed.The results reveal that Cu-20 Pb hypomonotectic alloys are mainly composed of matrixα-Cu andβ-Pb.The hypomonotectic alloy prepared under conventional condition presents large grain size with segergated structure,coarse dendritcs with less uniformity.By compound field,the segregation of hypomonotectic alloy can be inhibited,so dendrite is fined and densified with satisfied uniformity,and the grain size is decreased by 70.1%.Microhardness test reveals that the hardness of Cu-20 Pb hypomonotectic alloy under the compound field is increased by 29.68%.The frictional-wear test shows that the Cu-20 Pb hypomonotectic alloy alloys prepared under compound field has the lower friction coefficient and wear rate with desirable wear resistance.关键词：Electromagnetic Micro-gravity;Pulse Current;Cu-20Pb Hypomonotectic Alloy;Microstructure and Performance
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发布时间：2023-12-18 - 摘要：Taking the riser size of the superalloy Inconel 939 ring to ring castings as the optimized object,the casting yield and distance between the shrinkage and the casting surface were optimized.Firstly,the simulation scheme was designed by the uniform Latin Hypercube method.Then,the response surface model was established by different algorithms according to the simulated data.Finally,the optimal response surface model was selected to take multi-objective optimization of the riser size of the superalloy casting by the NSGA-Ⅱalgorithm.MCDM（multi criteria decision maker）was adopted to make decisions on multi-objective optimization problems.Through comparing the numerical model optimization results with the simulated ones,the casting yield difference is0.28%,and distance between the inner and outer ring riser shrinkage porosity and casting surface are 0.91 mm and 0.21 mm,respectively.关键词：Riser Optimization;Superalloy;Respond Surface;NSGA-Ⅱ Algorithm;MCDM
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发布时间：2023-12-18 - 摘要：The mechanical properties and microstructure of ZL104 alloy by reheat treatment and multi-welding repair were investigated by tensile,hardness testing and OM,EDS.The results show that the tensile strength is decreased by 8.4%、13.1%、20.3% and the elongation is decreased by 14.1%、34.3%、52.1% with one,twice and three welding repair after heat treatment.The hardness of welding zone is decreased remarkably and the base metal hardness is changed slightly.The welding repair times can result in the Mg element burn-loss,so the strengthening phase Mg2 Si is reduced and the welding microporosity is generated in form of the dendritic as-cast structure,resulting in the decrease of mechanical properties of the welding zone.关键词：Reheat Treatment;Multi-welding Repair;Mechanical Properties;Microstructure
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发布时间：2023-12-18 - 摘要：Based on the structure features of three-way valve,the gating system and overflow slot were designed.Flow-3Dsoftware was carried out to simulate the filling process.In the preliminary scheme,the entrained-air rate was serious.With optimizing the gating system and overflow slot,the entrained-air rate in the valve was reduced significantly.According to the optimized gating system,the mold was designed and manufactured.The three-way valve was produced sucessfully with smooth surface and good quality,meeting requirement.关键词：High Pressure Die Casting;Three-way Valve;Numerical Simulation
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发布时间：2023-12-18 - 摘要：Based on die-casting theory,the die casting process of automobile engine aluminum alloy suspension bracket was analyzed.Using finite element analysis technology,raw materials,die-casting mold,die casting process were analyzed.Based on analysis results,die casting mould was designed and manufactured.Through the test of the suspension bracket,it is proved that the suspension bracket product is safe and reliable.关键词：Engine;Suspension Bracket;Die Casting;Aluminum Alloy
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发布时间：2023-12-18 - 摘要：Aims to the requirements of reclaimed aluminum alloy,a ADC12 ZS aluminum alloy with Zn content≤2.5% was fabricated.Through experimental analysis,ADC12 ZS has the tendency to increase the high temperature hot brittleness and the hot cracking tendency.Meanwhile,the burning loss is increased during the melting process,and the aluminum liquid consumption rate is larger.In the process of manufacturing Al ingot,it can avoid the high temperature brittleness during the die casting by controlling the structure of Zn elements.Through strictly controlling furnace charge cleanliness,rate of area and the slag agent dosage as well as increasing heating speed,shortening time of smelting and controling the O2 concentration in the furnace,it is helpful to reducing the burning rate of Al material and slag content.关键词：Aluminum Alloys;Hot Brittleness;Burning;Slag Content;Melting
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发布时间：2023-12-18 - 摘要：The die casting technology for adjustable pitch propeller blade was designed.The technological scheme was adopted of top injection center ring pouring system and overflow slot,slag collecting and exhausting channel.The simulated results of filling and solidifying temperature field by ProCAST software show that the scheme is reasonable and feasible.With shrinkage volume as the evaluation index,the optimum process parameters are presented as follows:pouring temperature of 720 ℃,the pouring speed of 30 m/s,the filling pressure of 100 MPa and mold temperature of 220 ℃.Under the optimized parameters,the adjustable pitch propellers have the satisfied quality with smooth surface and absence of obvious defect,meeting the requirements.关键词：Adjustable Pitch Propeller Blade;ProCAST;Die Casting;Shrinkage Cavity（Porosity）
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发布时间：2023-12-18 - 摘要：Die-casting die as a technology-intensive manufacturing process,the growth rate in recent years has reached as high as 25%,and the total output of domestic die-casting die is ranking second only to the United States in the world.The development situation and industry characteristics of the mould industry in China were described,focusing on the opportunities and challenges faced by die-casting die industry,and the key points for the development of die casting die industry during the 13 th Five-Year Plan period were put forward,such as developing"One Belt One Road"international trade market against the Sino-US trade war.关键词：Die-casting Die;Intelligent Manufacturing;Transformation and Upgrading
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发布时间：2023-12-18 - 摘要：According to structural characteristics of ADC12 aluminum alloy shell,die casting process was designed.Through determining the position of the parting surface,the gating system,the exhausting overflow system and the die casting process parameters,a set of die casting process was presented.Flow-3Dsoftware was used to simulate the filling process of the initial scheme,and the position and the cause of the defects in the castings were determined based on the pressure,temperature,air entrainment and surface quality.According to the analysis results,the original process was optimized to carry out simulation analysis,meeting the production requirements.关键词：Aluminum Alloy Shell;Die Casting Process Design;Numerical Simulation
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发布时间：2023-12-18 - 摘要：The morphology,distribution and shapes of the primary carbides in Ni-base superalloys K403 casted by different methods were analyzed by optical microscope（OM）,scanning electron microscope（SEM）and energy dispersive X-ray（EDX）,and effects of the primary carbides on stress rupture behavior of K403 alloy at high temperatures were investigated.The results indicate that primary carbides in K403 are mainly composed of MC type carbide.The casting temperature can be ignored for effect on the primary carbide and stress rupture behavior.However,the long-rod and large primary carbides are detected in K403 alloy at slow cooling rate,which decreases its stress rupture behavior.In contrast,the enhanced stress rupture behavior is observed in K403 alloy at fast cooling rate as a result of the dispersed fine primary carbides.关键词：Superalloy;Investment Casting;Primary Carbides;Stress Rupture Behavior
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发布时间：2023-12-18 - 摘要：Aiming at the investment casting parts with complicated cavity structure and difficulty in core-drawing out,water-soluble wax core was adopted to make wax pattern instead of urea.Water-soluble core have the features of smooth surface,high strength and low contraction,stable dimension and environment,fully meeting the requirement for making the complicated components.关键词：Water-Soluble Wax;Core;Investment Casting
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发布时间：2023-12-18 - 摘要：Ceramic sand was used widely in resin sand casting as the features of spherical grain shape,higher refractoriness,inert chemical property,high strength and higher reuse rate.Subsequently,shell investment casting with ceramic sand was used gradually.Now,ceramic sand shell casting was used widely to produce cast iron and cast steel and so on,which can partially replace investment casting.The dimensional precision of the castings can reach CT7～CT6with surface roughness of 12.5μm,greatly improving the product yield and casting quality as well as greatly decreasing casting cost and exhaustion of scrap.关键词：Ceramic Sand;Shell Process;Application
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发布时间：2023-12-18 - 摘要：The expendable casting process of 12-cylinder cast iron bodies was simulated by the ProCAST software.The possible shrinkage porosities（holes）,and porosity were predicted and analyzed,and then the processing parameters were optimized.The optimized results show that middle pouring way with cylinder body"V"type inverted is satisfied.The simulated results show that the filling process is stable and absence of shrinkage porosities（holes）without adding riser can be observed.There are absence of shrinkage porosities（holes）in the casting by using X-ray,and mechanical properties of the castings meet the requirement,greatly improving the production yield.关键词：Cylinder Body;Expendable Casting Process;Numerical Simulation;Process Optimization
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发布时间：2023-12-18 - 摘要：SiCpreinforced aluminum matrix composites were prepared by means of powder metallurgy and hot extrusion deformation,and the friction and wear properties of the composites prepared were investigated.The results show that the homogeneity of SiCpparticle has great influence on the wear properties of the composites.The wear loss of the composites is increased firstly and then decreased with the increase of the SiCpcontent.With increasing in the wear rate and the wear loading,the wearing rate of the composites is increased.The wear properties of the SiCpreinforced aluminum matrix composite can be improved with Sn addition,however,Sn addition change can little affect the wear behavior of the hot extruded composites.关键词：SiCp/Aluminum Matrix Composite;Hot Extrusion Deformation;Friction and Wear Properties
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发布时间：2023-12-18 - 摘要：A356/6082 clad sheets were fabricated by liquid-solid rolling composite process.Effects of heat treatment temperature on interfacial microstructure and mechanical properties of A356/6082 clad sheet were investigated.The results reveal that the necking,melting and spheroidization of eutectic silicon on the side of A356 aluminum alloy occur with the increase of heat treatment temperature.Moreover,spheroidization first occurs at the interface of clad sheet,so the shearing strength of the interfacial zone is increased gradually.When the heat treatment temperature is 550℃,the composite interface presents uniform microstructure and the silicon particles are fine with round shape.In addition,elements in the interfacial region are fully diffused and the diffusion width is about 136μm.Interfacial shearing strength measured by push-out test is about 145 MPa.When the composite interface is subjected to uniform plastic deformation,the fracture form of the clad sheet is characterized by brittle fracture.关键词：Liquid-solid Rolling;Heat Treatment Temperature;A356/6082Clad Sheet;Interfacial Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The spray technique was applied to the dispersion forming of graphene composite particles.The effects of nozzle structure,jet distance,direct and swirl pressure ratio on the dispersion range and dispersion uniformity of graphene composite particles were investigated.The results show that the dispersion range of composite particles is slihtly affected by the nozzle outlet structure and decreased with the decrease of the injection distance.When the injection distance is 2mm,the composite particle sputtering coefficient is about 0.65.Compared with theⅡtype nozzle,the composite particle concentration zone obtained by theⅠtype nozzle injection is relatively small.In controlling the dispersion uniformity of composite particles,the pressure ratio has no obvious influence on the dispersion uniformity of theⅠ-type nozzle,while it has a great influence on the dispersion uniformity of theⅡtype nozzle.When the pressure ratio is 0.4,theⅡtype nozzle can obtain the desirable dispersion effect.关键词：Graphene Composite Particles;Injection Forming;Nozzle Outlet Structure;Pressure Ratio;Dispersion Effect
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发布时间：2023-12-18 - 摘要：Tensile deformation behavior of ZE42 magnesium alloy at elevated temperature was investigated by MTS-810hydraulic servo tensile tester with heating at 300～450℃and 3.0×10-4～0.17s-1.Both constitutive equation and processing map were established using Zparameter and material dynamic model（DMM）.The results show that the ZE42magnesium alloy sheet can avoid the instability zone when the average activation energy of thermal tensile deformation is 161kJ/mol.The steady rheological parameters of temperature and strain rate under hot tensile condition is in range of 380～440℃and 0.000 3～0.01s-1,respectively.关键词：Magnesium Alloy;Constitutive Equation;Hot Processing Map
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发布时间：2023-12-18 - 摘要：The corrosion behavior of 6082 aluminum alloy after different retrogression reaging treatment in 3.5%NaCl solution was analyzed by electrochemical method,microstructural observation,XRD and polarization curves.The results show that the microstructure of 6082 aluminum alloy is composed of a uniform distribution of beta-Mg2 Si particles and elementary Si with obvious orientation on the matrix ofα-Al solid solution.After regression treatment,there are almost no strenghening phases in the aluminum alloy matrix,and then the fine diffuse strengthening phase is precipitated in the grain after reaging treatment,and a large discontinuous equilibrium structure is formed on the grain boundary.The electrochemical corrosion resistance of 6082 aluminium alloy can be improved by the re-aging process of 220℃×40min and 220℃×60min.关键词：6082 Aluminum Alloy;Microstructures;Retrogression and Reaging;Electrochemical Corrosion
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发布时间：2023-12-18 - 摘要：The Al-12 Si alloys with different Cu contents were prepared by metal mold casting.The effects of Cu on the mechanical properties and thermal conductivity of Al-12Si-xCu-0.6Mg alloys were investigated.The results reveal that the mechanical properties are enhanced greatly as the Cu content increase.With the increase of Cu content,the strength of Al-12Si-xCu-0.6Mg alloy is increased from 212.3MPa to 285.3MPa,while the thermal conductivity is decreased from 152W/（m·K）to 119W/（m·K）.Microscopic analysis reveals that with the Cu content increase,α-Al is refined gradually from the developed dendrite to fine equiaxed grain and eutectic Si phase is coarsened.The dispersed blockα-Al cause the fracture of the electronic thermal conduction channel of the alloy,and the coarse eutectic Si can increase the scattering of electron conduction,resulting in a decrease of the thermal conductivity of the alloy.关键词：Al-Si Alloy;Microstructure;Thermal Conductivity;Mechanical Performance
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发布时间：2023-12-18 - 摘要：Effects of ultrasonic treatment and Er-Ce compound modification on microstructure and mechanical properties of hypereutectic Mg-3.2Si alloy were investigated,and the refining mechanism was described.The results reveal that with 0.6%（mass fraction,the same below）Er addition,the size of the primary Mg2 Si phase in the Mg-3.2Si alloy is decreased from 150μm to 40μm with strucutre transformed from bulky dendritic into irregular polyhedron shape.Then adding 1.0% Ce,polyhedron primary Mg2 Si phase with size of 5～10μm can be observed in the Mg-3.2Si alloy.With the increase of ultrasonic treatment power,the morphology,size and distribution of Mg2 Si in Mg-3.2Si alloy solidified structure can be improved obviously.With ultrasonic treatment power of1 200 W,the Mg2 Si phase in the alloy is changed into granulate structure,and its tensile strength and elongation reach 158 MPa and 4.5%,respectively.The fracture morphology of the Er-Ce compound modified Mg-3.2Si alloy after ultrasonic treated is characterized by as a mixed fracture form between cleavage fracture and dimple fracture.关键词：Mg-Si Alloy;Primary Mg2Si;Ultrasonic Treatment;Rare Earth Er and Ce
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发布时间：2023-12-18 - 摘要：Friction stir welding（FSW）experiments of A7N01P-T4 aluminum alloy butt-lap structure were carried out by using different stirring pin offset modes.The bridging characteristics,microstructure and properties of FSW were analyzed.The results show that the butt-lap structure can obtain the satisfied joints under different offset modes.The joint is mainly composed of base material zone,nugget zone,heat affected zone and thermo-mechanically affected zone.However,the joints appears in hook defect,S-line or cold lap defect,which can affect the quality of the joints.When the lap surface is set on the retreating side（RS）,and the stirring pin is inward,the S line can increase the damage to the joints and reduce greatly the load of joints（2.03kN）,while the pin is outward,the size of the cold lap is increased,howeever it has a little effect on the performance of joint（15.86～15.96kN）.When the lap surface is et on the advanced side（AS）,the S line has no obvious effect on the performance of joint.Meanwhile,the pin offset presents slight effects on the hook defects,so it has a little effect on the performance of joint（12.76～12.94kN）.Although the maximum load is lower than the former one in this mode,the stability of joint performance presents more desirable.Furthermore,FSW technology shows a better bridging ability in the welding of aluminum alloy butt-lap configuration.关键词：Friction Stir Welding;Butt-lap Structure;Pin Offset;A7N01P-T4Aluminum Alloy
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发布时间：2023-12-18 - 摘要：The Ti811 titanium alloy sheet was subjected to multi-pass rolling and then annealed.The microstructure,fracture structure and mechanical properties of the rolled alloy were analyzed by optical microscope,scanning electron microscope and tensile testing.The results reveal that the microstructure of the rolled titanium alloy is mainly composed of elongatedβ-phase grains and coarse lath-likeα-phase grains.Annealing after rolling can promote the equiaxification ofα-phase grains andβ-phase grains.Meanwhile,annealing treatment also promotes the conversion ofαphase grains intoβphase grains,and with increasing in the annealing temperature,the conversion ratio is increased.Annealing treatment is beneficial to reduce the difference of the anisotropic tensile strength of the rolled titanium alloy.The room temperature comprehensive mechanical properties of the samples annealed at 900℃ present desirable,where the tensile strength of LD and TD direction are 947.4MPa and 924.7MPa and the elongations reach 11.6%and 9.4%,respectively.The fracture modes of the two samples annealed at900℃are characterized by ductile fracture.关键词：Titanium Alloy;Annealing Temperature;Tensile Strength;Elongation
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发布时间：2023-12-18 - 摘要：It was presented briefly the application of aluminum alloy in automobile parts and advantages as well as disadvantages by powder metallurgy process.A low cost technology for preparing high performance aluminum alloy steering knuckle was put forward.The characteristics of this process is the direct use of pure aluminum powder as the main raw material and adding other elements to overcome the shortcoming of expensive raw material of traditional aluminum alloy powder.Meanwhile,degreasing-sintering-heat treatment process is improved also.At last,it is verified that the aluminum alloy steering knuckle manufactured by the powder metallurgy has the satisifed mechanical properties.关键词：Powder Metallurgy;Aluminum Alloy;Steering Knuckle
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发布时间：2023-12-18 - 摘要：The effects of crystallization behavior on the corrosion behavior of Ti35Zr30Be24Cu7.5Co3.5bulk amorphous alloy in 3mol/L HCl solution were investigated by electrochemical method.The phase structure,crystalline behavior and corrosion morphology of amorphous alloys were analyzed by XRD,DSC and SEM.The results show that the crystallization of Ti35Zr30Be24Cu7.5Co3.5amorphous alloy is composed ofα-Ti+CuZr2+CoZr phase.The as-cast amorphous alloy still has the best corrosion resistance.After 1hannealing at 350℃,the alloy is partially crystallized.The corrosion current density is in the same number of magnitude with the as-cast amorphous alloy.The corrosion resistance is decreased slightly.When the temperature reaches 550℃,the alloy is completely crystallized and the corrosion resistance becomes worse.关键词：Bulk Amorphous Alloy;Crystalline Behavior;Corrosion Resistance
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发布时间：2023-12-18 - 摘要：Based on single factor test and complete factorial testing,numerical simulation was carried out by using Simufact software.The actual outer diameter and wall thickness deviation were taken as evaluation indexes,and the axial offset,working angle and arc radius were counted into as variables to reveal the interaction and influence between factors of dimensional precision of power spinning tin bronze.The results indicate that in the single factor testing,the deviation of the actual outer diameter and wall thickness is increased with the increase of axial offset,and it is decreased with the increase of working angle and arc radius.In the factorial testing,interaction between the factors plays a important role,even exceeding the main effects of some single factors.关键词：Power Spinning;Full Factorial Test;Tin Bronze
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发布时间：2023-12-18 - 摘要：In order to accurately describe the variation law of the influencing factors of pulling force during the low-frequency vibration of the thin-walled copper tube,the MSC.Marc was used to establish the low-frequency vibration drawing model of the copper tube,and the influence of drawing speed,excitation amplitude,excitation frequency and mold cone angle（the outer mold half cone angle,the core half cone angle）on the drawing force was analyzed.The results show that with the increase of drawing speed,drawing force is increased slightly.In the range of excitation frequency of 80～150 Hz,the pulling force is decreased firstly and then increased.With increasing in excitation amplitude,pulling force is decreased greatly.And outer mold half cone angle and core half cone angle have a best mold cone angle combination.关键词：Thin-Walled Copper Tube;Floating Core Pull;Low Frequency Vibration;Drawing Force
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发布时间：2023-12-18
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