最新刊期
卷 34 ， 期 6 ， 2014
- 摘要：The dynamically changing and combining boundary condition in LMC and the microstructure evolution were simulated by a self-developed software Teccast.Macro-micro structure simulation of blade was conducted at different directional solidification process.The results reveal that the narrower mushy zone can be obtained by LMC compared to the mushy zone in HRS,especially in the thick position.Because of larger temperature gradient and less concave mushy zone by LMC,stray grain can be avoided at higher withdrawal rate.To improve the product efficiency of the hollow SX blade,higher withdrawal rate can be adopted within the range limited by thermal stress.关键词：Hollow SX Blade;LMC;Directional Solidification;Microstructure;Numerical Simulation
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发布时间：2023-12-18 - 摘要：The CrxCuFe2Mo0.5Nb0.5Ni2（x=0,0.5,1.0,2.0,mol）high entropy alloys were prepared by arc melting process.The phase,microstructure,element distribution and hardness of the alloys were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）and digital display Vickers hardness tester.The results show that the alloys are composed of a mixed structure of FCC,BCC and HCP solid solutions.The increase of Cr content is beneficial for the formation of BCC phase.The microstructure of the alloys is mainly characterized by a dendrite and interdendrite structure.The Nb,Mo and Cu are mostly segregated in dendrite and interdendrite regions,respectively,while the Fe,Cr,and Ni are homogeneously distributed in the alloys.The hardness has a slight increase with the increase of Cr content.关键词：High Entropy Alloy;Phase Structure;Microstructure;Composition Analysis;Hardness
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发布时间：2023-12-18 - 摘要：Microscopic shrinkage is easy to generate in the aluminum alloy impeller as a result of uneven thickness and complicated design structure.Combining with the actual production conditions,filling and solidification process of initial design for aluminum alloy impeller were simulated.Through analyzing flow morphology,the solidification sequence and shrinkage porosities,and comparing with actual produced impeller,origination of defects in the original process was presented.Based on the above mentioned results,using InteCAST software,casting process optimization for aluminum alloy impeller was conducted,and a optimized design was presented.The actual impeller was produced to verify the availability of the simulated results.The results show that the optimized design can reduce effectively the shrinkage porosity（choles）in the castings.关键词：Aluminum Alloy;Impeller;Simulation;Casting Process Optimization
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发布时间：2023-12-18 - 摘要：TiC dispersedly strengthened tungsten matrix composites were fabricated with the help of the high energy milling and vacuum hot pressing.The microstructure and mechanical properties such as relative density,micro-hardness,Young′s modulus and bending strength of the composites were investigated.The results show that a small addition of TiC can change the fracture mode from intergranular type to transgranular type as a result of inhibiting effectively the growth of W particle,improving the mechanical properties of TiC/W,especially for 1% n-TiC/W composite.Compared with the n-TiC,the effects of μ-TiC on the mechanical properties can be neglected.关键词：Tungsten;TiC;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The casting process of ZL114Aalloy complicated shell was described.The mechanical properties of the typical parts with different wall thickness were analyzed.The results show that the mechanical properties of large section in parts are greatly lower than those in thin section parts,which can’t meet the design requirements.By increasing the cooling rate of the large section part,the mechanical properties are improved greatly,especially the elongation increased to 5.3%from 2.9%.关键词：Shell;ZL114A Alloys;Low Pressure Casting;Chilling Block;Mechanical Properties
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发布时间：2023-12-18 - 摘要：In order to obtain the molten metal flow pattern during vibration casting and to optimize vibration parameters,dynamic mesh and two-phase flow model were coupled to simulate flow field in vibration cavity,and orthogonal design was conducted to optimize the vibration parameters.The results show that the vibration can improve obviously the flow conditions of liquid metal in cavity,and reduce the filling time and the wall shearing stress.The optimization parameters were presented as follows:vibration frequency of 30Hz,amplitude of 0.3mm and the vibration direction of 45°to the horizontal direction.The practical experiment verifies that the optimized parameters are helpful to obtain the better filling effects.关键词：Vibration Casting;Dynamic Mesh;Two-Phase Flow;Orthogonal Design;Parameter Optimization
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发布时间：2023-12-18 - 摘要：According to casting process of large Makino milling machine body,the filling and solidification process were simulated by the Anycasting software to understand temperature field and flow field.According to effect of filling temperature（1 280℃、1 320℃、1 360℃、1 400℃）and filling speed（1.0m/s、1.2m/s、1.4m/s）on the casting process,influencing factors on the quality of milling machine body were analyzed.The results reveal that gas holes in the castings can be eliminated by adopting optimized parameters such as pouring temperature of 1 320℃and filling velocity of 1.2m/s as well as setting a riser at rational position to control the final solidification in the riser.Based on the temperature distribution in the milling machine body,shrinkage porosity（holes）is reduced,which provides a reference for practical production.关键词：Milling Machine;Heavy Iron Casting;Casting;Computer Simulation
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发布时间：2023-12-18 - 摘要：Thermal equilibrium equation for rolling casting process of AZ31 magnesium alloy was established under the two-dimensional rectangular coordinate system.Considering multiple factors of rolling casting process,orthogonal method of 4 level to 5 factors was used to analyze the numerical experiment with the pouring temperature,rolling speed,water cool intensity,roll gap,roll diameter.Based on the Fluent software of ANSYS,the temperature field in rolling casting process was simulate to understand influencing sequence of rolling parameters for magnesium alloy strip and to provide reference for the presentation of optimal technological parameters.The results show that the roll gap is the significant factors,and then casting speed,water cool intensity,roll diameter.The significant confidence level is 95%.关键词：Fluent;Rolling Casting;Temperature Field;Magnesium Alloy
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发布时间：2023-12-18 - 摘要：With the help of Fluent Software,effects of variable rotational speeds,argon gas flux and position of impeller on flow field in aluminum melt spinning purification were analyzed.The results indicate that the distribution of the bubbles enhibits desirable with the rotating speed of 600r/min in a centric stirring.With the increase of rotational speed and the decrease of gas flux,flow velocity and turbulent intensity in melt are increased.In a centric stirring,the turbulent intensity is further enhanced,so the bubble size becomes smaller,and refinery efficiency is further improved.关键词：Simulation;Rotating Impeller;Flow Field
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发布时间：2023-12-18 - 摘要：Design of die casting die for a U shape magnesium alloy frame housing with complicated structure and difficult to parting and pulling-out was conducted based on the Pro/E and intelligent expert design system.The mould was designed to avoid cutting and to pull-out smoothly as possible.The mould core adopted the main core plus slide-type structure,character and structure of the pendulum launch sequence retractor plate ejection mechanism.Through three-dimensional modeling of the mold,interference checking and mold castings trial to product,the results show that the mold operate smoothly and realize sequential pulling-out,obtaining excellent magnesium alloy castings.关键词：Pro/Engineer;Magnesium Alloys;Intelligent Design Expert System;Die-casting Die
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发布时间：2023-12-18 - 摘要：Equal channel angular pressing（ECAP）,as one of the most effective methods for producing ultra-fine grain materials（UFG）,whose principle is that through pressing the billet in the die with two channels intersecting at an angle repeatedly,high shear strain is imposed on the sample,and thus the grain size is refined.However,experiments show that cracking or fracture usually occurs in the vicinity of upper surface of the extruded specimen even only after a few passes with conventional die（90°）.The tensile stress occurs in the vicinity of upper surface of the specimen in the severe plastic deformation zone,which increases the crack and fracture tendency of the specimen and impedes the further ECAP processing.2A12aluminum alloy was tested by ECAP.The results reveal that in the Crouth four passes,extruding effect exhibits desirable,and the grain refinement is improved,where elongation is increased by 10.3%,and maximum hardness is increased by 46.4%.关键词：Equal-Channel Angular Pressing;2A12 Alloy;Squeeze Routh;Refinement Effect
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发布时间：2023-12-18 - 摘要：Two schemes of the metal mold low pressure series casting method for producing aluminum alloy conductor were analyzed comparatively.Two schemes adopted one mould-multi parts.Compared with one mould-two parts in metal mold low pressure casting,casting quality is more desirable with higher production efficiency and lower cost.Horizontal parting scheme can complete the entire production process under condition of absence of core pulling mechanism,however,each piece must set a vent or the upper ejector rod to prevent the occurrence of casting top pocket and misrun.Vertical type scheme can complete the whole production process under condition of absence of mechanism with upper mold,and the misrun and top pocket can be eliminated as a result of exhaustion from parting face.关键词：Aluminum Alloy Conductor;Metal Mold;Low Pressure Series Process
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发布时间：2023-12-18 - 摘要：The squeeze casting mould design of the air conditioning compressor cover and its simulation analysis were carried out.The parameters were calculated including extrusion pressure,demoulding force,ejecting force,clamping force and runner size.The main parting surface was determined based on center part of the side-core holes and the workpiece maximum cross section.The overflow slot with ladder structure was adopted.To accelerate exhaustion,exhausted channel was connected at the overflow slot,and the exhausted block was set.The angle pin and plate type core pulling mechanism was considered.The distance of cooling channel center line and the cavity surface is 12times of the cooling channel diameter.The center distance between the cooling channels is 35times of the cooling channel diameter.Gating system meet the requirement of the sequential solidification principle,and the parts can be feed smoothly during solidification,avoiding the shrinkage porosity（holes）.关键词：Die Casting;Infiltration;Squeezing Casting;Mold Design
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发布时间：2023-12-18 - 摘要：According to the characteristics of the specific structure of the aluminum alloy parts,the correct position and numbers of the pusher were determined.Practical production reveals that all positions of the die casting parts are subjected to the homogeneous pushing force to be pushed out smoothly,and the deformation is avoided and casting quality is ensured.关键词：Aluminum Alloy;Die Casting Die;Pusher
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发布时间：2023-12-18 - 摘要：Through analyzing the structure characteristics of bracket,the irrational gating design in the gating system is responsible for the defects of core soldering and size over-tolerance easily occurred in the bracket.Based on the analysis,the center gating was designed in gating system design substituted for side gating design.The results reveal that the problems above mentioned are eliminated completely through adopting the modified gating system.And then,through applying beryllium copper cooling,the problems in difficult to cool small sprue spreader are solved in adopting center gating design.关键词：Soldering;Center Gate;Gating System Design;Beryllium Copper Cooling
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发布时间：2023-12-18 - 摘要：According to the structure and the performance characteristics including high strength,high ductility and impact resistance,the indirect squeeze casting process scheme and the process parameters were determined.The lamp cover with300mm in diameter was successfully manufactured by 10 000kN horizontal squeeze casting machine.In addition,the microstructures and mechanical properties of the lamp cover manufactured were investigated by tensile testing,optical microscope and scanning electronic microscope.The results show that the aluminum alloy lamp covers have satisfied appearances and surface quality and absence of macro defects such as shrinkage porosity and cavity with the pouring temperature of 640670℃,the mold temperature of 240℃,the casting pressure of 100MPa and the punching velocity of 0.100.12m/s.After T6treatment,tensile strength and elongation of the lamp cover reach 297MPa and 9.4%,respectively,meeting the requirement.关键词：Lamp Cover;Squeeze Casting;Microstructures;Mechanical Properties
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发布时间：2023-12-18 - 摘要：A CA-FE model in which the influence of electromagnetic stiring was taken into account was established by the coupling of finite element and cellular automaton to understand the basic formation mechanism and evolution mechanism of the semi-solid aluminum alloy under LSPWES（low superheat pouring and weak electromagnetic stirring）method.The flow distribution and A356solidification structure at different stirring parameters were simulated.The results show that a weak electromagnetic stirring can increase the rate of nucleation,enlarge the solidification region,improve the uniformity of the grain growth in all directions and promote the formation of globular structure with the pouring at 630℃.The optimized stirring parameters are presented as follows:power frequency of 10Hz,stirring power of 1.2kW and the stirring time of 6s.关键词：LSPWES Method;Semi-solid;Cellular Automaton;Numercial Simulation
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发布时间：2023-12-18 - 摘要：Alloy components with high damping capacity can work in a stable manner with less noise.ZA alloy has high damping capacity with very potential for the damping material.The research of damping capacity of ZA alloy was reviewed.The microstructure characteristics and mechanism of damping capacity of ZA alloy were described.Effects of various factors including alloying elements,heat treatment,solidification and processing technique as well as the second phase reinforcement on damping capacity were expounded.Finally,the developing future was presented.关键词：ZA Alloy;Damping Capacity;Research Progress;Development Trend
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发布时间：2023-12-18 - 摘要：Effects of heat treatment on microstructures and properties of modification chilled cast iron roll were investigated by scanning electron microscopy（SEM）,X-ray diffraction（XRD）analysis.The results show that the as-cast microstructure of modification chilled cast iron roller is composed of bainite,carbide,a small amount of martensite,trace retained austenite and vermicular graphite.After heat treatment,retained austenite almost disappears,and bainite content is increased obviously.Along with the increase of tempering temperature,the hardness of the sample prepared is reduced,and impact toughness is increased firstly and then decreased.Desirable comprehensive mechanical properties of the specimen tempered at 250℃can be obtained.关键词：Modified Infinite Chilled Cast Iron;Heat Treatment;Microstructures;Properties
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发布时间：2023-12-18 - 摘要：Comparative experiments were carried out by different pouring method for gypsum mould investment casting Mg alloy.The simulated results show that low pressure casting method is superior to gravity casting due to the poor permeability.The results show that thin-walled Mg alloy casting defects are mainly coldshut.For gravity casting,coldshut is serious,and it is difficult to eliminate by improving process,while for the low pressure casting,casting coldshut can be eliminated.Even if there is a slight coldshut,it is also easy to remove through improving pouring temperature and pressure.In addition,gravity casting cannot aviod casting oxidation,however,low pressure casting can realize oxidation-free by taking some measures.关键词：Mg Alloy;Gypsum Mould Investment Casting;Gravity Casting;Low Pressure Casting
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发布时间：2023-12-18 - 摘要：The process redundancy of investment casting Cr20stirring rod with sodium silicate as binder is only 2mm.The casting defects occur such as over-size of blind hole,shell crack during pouring process,metal bean and inclusion in the stirring rod during production.Some measure were adopted to eliminate the mentioned casting defects through correcting wax pattern to control size of blind hole,adding shell layer and bundling pattern with iron wire to prevent from crack,brushing cast-type position as well as changing interval of pattern assemble and drying time of shell.关键词：High Cr Cast Iron;Over-Size;Shell Crack;Metal Bean;Inclusion
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发布时间：2023-12-18 - 摘要：The interface reactions between DZ22directionally solidification superalloy and Al2O3ceramic shells were inverstigated to solve the reaction defects.The surface morphology and the chemical composition of inteface were observed and analyzed by optical microscope and scanning electron microscope with engery dispersive spectroscopy.The results show that the reaction products are Cr2O3with pink on surface and white HfO2at interface of metal-shell.With the increase of the impurity content in slurry for ceramic shells preparation,the reaction degree between superalloy and ceramic shell becomes more serious.关键词：Al2O3 Shells;DZ22 Superalloy;Interface Reaction
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发布时间：2023-12-18 - 摘要：2mm long short glass fibers were mixed into the slurries in order to improve the strength of silicon sol shell for investment casting process,and the green strength and fired strength of the silica sol shell specimens contained different glass fibers were investigated.Meanwhile,the fracture surface of short glass fiber-reinforced silicon sol shell specimens contained different contents of fibers was observed by SEM（scanning electron microscope）.The results show that the green strength of the shell specimens reinforced with glass fibers is improved remarkably.The shell reinforced with 0.6%glass fibers reaches the highest green strength of 2.991MPa,increased by approximately 15.75%compared with the unreinforced shell specimen.However,absence of obvious improvement of the strength of the short glass fiber-reinforced shell specimens fired at 900℃for 120min can be observed.It is also found by SEM（scanning electron microscope）that the short glass fibers in the reinforced silicon sol shell specimens are melted in part or in whole during the fired process,resulting in the decrease of the reinforced effects of glass fibers in the specimens.关键词：Silicon Sol Shell;Glass Fibers;Green Strength;Strength of Fired Specimens
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发布时间：2023-12-18 - 摘要：The countermeasures preventing deformation from foam pattern in lost foam casting process were described.Practical producing experience was reviewed,and the technological process and key points during preparation of the foam pattern were presented.关键词：Foam Pattern;Deformation;Countermeasure;Process Control
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发布时间：2023-12-18 - 摘要：Microstructure,hardness and alloy element distribution in composite surface of high chromium cast iron-carbon steel liquid-liquid composite cast hammer were investigated by OM（optical microscope）,SEM（scanning electron microcope）and hardness testing.The experimental results show that high chromium cast iron of liquid-liquid composite cast hammer has a higher hardness of HRC62and carbon steel hammer handle reaches HRC22with normalizing at 900℃and tempering at 200℃,and hardness distribution in composite surface exhibits gradient gradually.Carbon and chromium alloying elements in high chromium cast iron are diffused gradually from composite surface to carbon cast steel,resulting in the increase of hardness of carbon steel part and decrease of high chromium cast iron part.The microstructure of high chromium cast iron is composed of martensite and M7C3type carbide,and carbon steel consists of pearlite and more ferrite near the composite surface.The common defects of high chromium cast iron and carbon steel liquid-liquid composite cast hammer include poor composite surface,porosity and inclusion.Through controlling delayed time and pouring temperature of high chromium cast iron,the casting defects can be eliminated.关键词：High Chromium Cast Iron;Carbon Steel Casting;Liquid-Liquid Composite Casting
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发布时间：2023-12-18 - 摘要：The TiB2/Cu composites were prepared by microwave sintered with TiB2/Cu composite powder billets in a microwave sintering furnace.Some processing factors influencing TiB2/Cu composites preparation by microwave sintering were investigated.The results reveal that a faster heating rate can be obtained using SiC powders as the heating agent with flexibly controllable temperature.A preferable temperature measurement could be realized when the samples were placed on the SiC powders susceptor.By the method,the surface of the samples after microwave sintering is smooth with absence of obvious defects.With the increase of sintering time and temperature,relative density of the samples prepared is improved.And the maximum relative density is presented with sintering at 1 000℃for 10minute.关键词：Microwave Sintering;Copper Matrix Composite;Preparation Technology
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发布时间：2023-12-18 - 摘要：By treating surface of solid aluminum alloy with zincate treatment,the oxide film is removed accompanying with zinc layer deposition on aluminum,which can improve effectively the wettability between magnesium and aluminum.A satisfied metallurgical bonding cladding materials can be prepared on the basis of optimizing the liquid-solid bonding process of magnesium-aluminum.The microstructure and property investigation of interface reveal that it is key factors by removing the oxide layer and prevent its regeneration to improve the wettability of magnesium-aluminum bimetal.And celement diffusion occurred in the interface,and a metallurgical bonding was formed.关键词：Liquid Mg/Solid Al;Dissimilar Metal Welding;Liquid-Solid Interface Diffusion;Microstructure and Properties of Interface
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发布时间：2023-12-18 - 摘要：Al-10SiC/Al4C3master alloy grain refiner was prepared for the grain refinement of AZ63alloy through liquid sintering process.X-ray diffraction spectrum shows that the Al-10SiC/Al4C3master alloy is composed of primary Al phase,A14C3,Si and SiC.With 0.5% Al-10SiC/Al4C3master alloy addition at 750℃,the grain size of AZ63 magnesium alloy can be decreased from approximately 450μm to150μm.However,with Al-10SiC/Al4C3 master alloy addition more than 0.5%,refinement effects of grain size in the AZ63alloy can be ignored.关键词：AZ63Alloy;Grain Refinement;Heterogeneous Nucleation;Al4C3
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发布时间：2023-12-18 - 摘要：Large cylinder with 1 410mm in length and 615 in diameter and 223kg in weight was produced with ZL101Aaluminum alloy,which required high technical condition and casting quality.It is not allowed for slag inclusion,porosity,shrinkage hole,shrinkage on the surface of casting,and it is subjected to FS6in the air seal test and 1.22MPa pressure in the water seal test.Cylindrical structure is complicated with big size,uneven wall thickness,so there exists many hot spots,leading to easily generate the casting defects.Through the development of large aluminum alloy cylindrical castings,a set of effective methods to improve the qualified rate of leakage detection of large aluminum alloy casting bearing pressure were presented.关键词：Large Aluminum Alloy Castings;Cylinder;Pinhole;Leakage;Casting Defects
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发布时间：2023-12-18 - 摘要：Effects of different solution treatment temperatures on the microstructures and mechanical properties of cold-rolled Ti-4.5Al-2.5V-1.5Fe-0.25Oalloy were investigated by OM,XRD,tensile testing and hardness testing.The results show that the alloy is mainly composed ofαphase andβphase.With the solution treatment temperature increases,the content ofβphase in the alloy is gradually increased.Furthermore,the microstructure transform evolution is observed in the alloy with the primary equiaxedαphase transformed toβphase,and then to total lamellar transformedβand intergranularαphase.As a result,the tensile strength and hardness of the alloy are increased and the elongation is decreased.The mechanical properties of the alloy are closely related with the transform evolution of the microstructure with the solution temperature increase.关键词：Ti-4.5Al-2.5V-1.5Fe-0.25OAlloy;Cold-rolled Sheet;Solution Treatment;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：Ti-6Al-4Valloy was prepared by cold isostatic pressing and vacuum sintering.The microstructure of TC4alloy at different solution and aging temperature was observed and analyzed.Effects of solid solution and aging treatment on tensile strength and elongation of TC4alloy were investigated by tensile testing to present a optimized solid solution and aged parameters.The experimental results show that the alloy has a satisfied tensile strength and elongation with solid solution and aging at 930℃for 30min with water quenching as well as 470℃for 4hwith water quenching.关键词：Cold Isostatic Pressing;TC4Alloy;Microstructure;Solid Solution and Aging Treatment;Tensile Strength;Elongation
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发布时间：2023-12-18 - 摘要：The Al-13.6Cu-6Si alloy was solidified under the different pressure of 2,4,5,6GPa,respectively with the help of cubic anvil press.The microstructure and phase constituent of the samples were examined by optical microscope,scanning electron microscope and X-ray diffraction.The relationship between pressure and microhardness were determinated by microhardness testing.The experimental results show that,the microstructure of the alloy solidified under the high pressure is composed ofα-Al,β-Si,andθ-Al2Cu phase,which is the same as those of the alloy solidified under the normal pressure.However,its microstructural morphology is changed significantly,where the coupled eutectic structure of the alloy solidified under normal pressure has transformed to the divorced eutectic structure with the alloy solidified under high pressure.With the increase of the solidification pressure,the volume fraction of theα-Al is increased,and the hardness of the alloy is increased to the maximum value at 5GPa.关键词：High-Pressure Solidification;Ternary Al-Cu-Si Eutectic Alloy;Microstructure;Phase Constituent
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发布时间：2023-12-18 - 摘要：7075 aluminum alloys containing erbium（mass fraction 0.30%）were prepared by ingot metallurgy method.Effects of adding erbium and the retrogression and re-aging（RRA）treatment process on microstructure of the alloy were analyzed by optical microscopy,scanning electron microscopy and spectroscopy,and the mechanical properties were also examined to optimize the heat treatment.The results show that with 0.30% Er addition,the grain sizes of alloy are refined greatly.After T6aging treatment,the tensile strength and yield strength of the alloy reach 585 MPa and 528 MPa,respectively,with 8.5%of elongation and 724of the quality factor.Compared with those of alloy with Er free,the above properties are improved by 2.63%,2.33%,21.43% and by 3.87%,respectively.The tensile strength and yield strength of the 7075alloy with 0.3% Er after optimized retrogression and re-aging（RRA）treatment process at 120℃for 16hand at 180℃for 10min as well as at 120℃for 16h,reach645MPa and 603MPa,respectively,with 11%of elongation and 801of the quality factor.After RRA treatment,the mechanical properties are increased dramatically.Compared with the T6treatment,the above properties are improved by 10.26%,14.20%,29.41%and by 10.64%,respectively.关键词：7075Aluminum Alloy;Erbium;Regression and Re-Aging Treatment;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：Hot compression tests of Mg-4Al-0.29Mn-0.97Gd magnesium alloy were performed on Gleeble-1 500hot simulator with strain rates in range of 0.1s-1 to 5s-1 and deformation temperature at200℃400 ℃.The experimental results reveal that the dynamic recrystallization occurs in the alloy during hot compression.Deformation mechanism at specimen edges is mainly characterized by twin-crystal deformation,and deformation mechanism at center belongs to recrystalization.The main process of hot compressive deformation of magnesium alloy is controlled by deformation temperature and strain rate.关键词：Hot Compression;Stress-Strain Curve;Deformation Mechanism
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发布时间：2023-12-18 - 摘要：<正>20140601 Jafari H,Idris M H,Ourdjini A.镁合金陶瓷型精密铸造的另一种方法:原位熔铸技术.Journal of Materials Processing Technology,2014,214:988-997.熔模铸造通常被用来生产高质量的形状复杂件或者表面要求很高的薄壁件,被认为是镁合金精密成形的实用方法。然而,由于镁合金和氧有很高的亲和力,消除镁合金和模具的反应以获得高的表面质量成为熔模铸造镁合金的一大挑战。目前为控制镁合金熔模铸造时型壳-金属间的反应,研究思路主要有两条:选择合适的型壳材料或者控制生产工艺参数。利用原位熔化技术克服陶瓷壳体熔模铸造AZ91D镁合金时型壳-金属反应的难题,以获得表面质量良好的铸件。将AZ91D合金颗粒充满型
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发布时间：2023-12-18
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