最新刊期
卷 ， 期 2 ， 2002
- 摘要：Influence of MM and Al5TiB on the microstructure of B319 aluminum alloy in lost foam casting（LFC） was investigated by means of ICP spectroscopy, energy dispersive x ray analysis （EDX）, X ray diffraction and microscope analysis. The results showed that Si phase in B319 aluminum alloy could be modified well with 0.2% RE in lost foam casting and coral like Al 2Cu phase, Chinese character α Fe phase and acicular β Fe phase were found also in the structure, of which both Si phase and acicular β Fe can be acted as the substrate for Al 2Cu phase nucleation.Intermetallic compound rich in La La 2Si 2Al 3 would appear with over 0.3% MM addition. MM may react with Ti to form blocky compound containing RE to deteriorate the structures of the alloy. The results showed that Al5TiB master alloy is unsuitable refiner with mischmetal modification.关键词：Mischmetal （MM） Alloy;Aluminum Alloy;Lost Foam Casting
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- 81
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发布时间：2023-12-18 - 摘要：Influence of RE modifier on as cast grain size of super low carbon cast steel was studied. The results showed that a great deal of high melting point compound were formed in RE treated super low carbon cast steel. EPMA analysis showed that the compound is mainly composed of Ce 2O 3 served as nuclei for heterogeneous nucleation so as to refine grain size obviously and in turn raise greatly the yield strength of the steel.关键词：Modification;RE;Grain Refinement
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- 250
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发布时间：2023-12-18 - 摘要：Aluminum matrix composite reinforced with potassium titanate whisker was prepared by squeeze casting technique. The mechanical properties of the composite are much better than those of matrix alloy and the thermal expansion coefficient decrease greatly. Strain hysteresis was observed in both matrix alloy and composites during thermal expansion experiment at 50～ 280 ℃ . Residual plastic strain occurred in matrix alloy after thermal cycle while the dimension of the composites reinforced with 20% whisker had no change owing to the absence of residual plastic strain, exhibiting excellent thermally dimensional stability.关键词：Composite;Potassium Titanate Whisker;Mechanical Properties;Thermal Expansion Behavior
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- 75
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发布时间：2023-12-18 - 摘要：Smelting rate was increased and both gas content and subversive inclusion in Monel alloy were decreased through some ways, including increasing power mass rate,main frequency and laying graphite crucible in medium frequency induction coreless furnace. Smelting of Monel alloy in medium frequency coreless induction furnace was realized successfully.关键词：Monel Alloy;Induction Furnace;Power Mass Rate;Medium frequency Mains
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- 257
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发布时间：2023-12-18 - 摘要：The analysis of filtering flow process of aluminum cast alloy based on hydraulic simulation was carried out. The filtering efficiency formula was established. The results showed that the filtering efficiency was improved with the increase of filter’s porosity under constant Re number and with the decrease of Re value under constant filter’s porosity .关键词：Hydraulic Simulation;Filtering Efficiency;Aluminum Alloy;Re Number;Porosity
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- 59
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发布时间：2023-12-18 - 摘要：The microstructures of Mullite/ZL101 composite and its matrix alloy in squeezing casting were observed by optical microscope and TEM. The ageing characteristics of the composite and its matrix alloy were examined by HB and Differential Scanning Calorimeter （DSC）. The results showed that the good Mullite/ZL101 composite can be made in squeezing casting. The Mullite fibre has obviously strengthening（hardening） effect on ZL101 alloy. The aged hardness of the composite is much higher than that of the matrix alloy in the whole isothermal ageing process. The ageing precipitation sequence of the matrix alloy has not been changed and the SSS→GP reaction controlled by vacancy diffusion at low temperature has not been significantly suppressed with the synthesization of short mullite fibre. The peak temperature and activation energy value in β″ precipitation of the composite are lower than those of the matrix alloy. The ageing hardening course of Mullite/ZL101 composite is accelerated obviously to some extent.关键词：Squeezing Casting;Composite;Short Mullite Fibre;ZL101 Alloy;Ageing
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- 51
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发布时间：2023-12-18 - 摘要：The full process from three dimensional geometrical modeling to the generation of moulding tools can be better realized through the application of CAD/CAE system of casting process to inlet manifold design for the motor. The CAD system of casting process, including processing parameters, riser and gating system design modules,has been developed based on UG molding software.The simulation of flow field and temperature field for the casting in CAE system are carried out in order to check and optimize processing design.关键词：Casting Process;CAD/CAE;Mold Filling Simulation;Solidification Simulation
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- 143
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- 3
发布时间：2023-12-18 -
- 摘要：A expert system for DADC to be composed of knowledge base, inferencer, data base and user machine I/O system was developed to seek the cause of casting defects formation. Production law in knowledge base contains related data information of casting defects and the tactic of in accuracy inference in inferencer.关键词：Expert System;Analysis and Prediction;Prolog Language
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- 72
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发布时间：2023-12-18 - 摘要：The development of squeeze casting technology home and abroad in recent two years are summarized.The development of squeeze casting equipments,products,alloy materials and composites,semi\|solid process and moulding tools design are emphasized in the survey.
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- 1314
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- 34
发布时间：2023-12-18 - 摘要：The design principle for die casting structure was summarized based on die casting characteristics and processing requirement of Mg alloy. The key technologies for die casting die were approached from some aspects of selecting die casting machine, setting processing parameters, designing gating system. The gating system for Mg alloy die casting was optimized through computer numerical simulation to ensure effectively the designed quality.关键词：Mg Alloy;Die Castings Design;Die casting Die;Processing Parameters;Numerical Simulation
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- 276
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发布时间：2023-12-18 - 摘要：Influence of processing parameters and heat treatment on mechanical properties of die cast AZ91D alloy was studied. The results showed that the as cast mechanical properties: σ b=232 MPa, δ 5=3.1%, HBS=76, A k=5.1 J, of die cast AZ91D alloy and heat treated properties: σ b=243 MPa, δ 5= 4.6% , HBS=65, A k=19 J can be obtained in conventional cold chamber press. The mechanical properties of Mg alloy die castings with decorative or functional requirement through improvement of alloy melt quality, the control of die casting processing parameters and the heat treatment can be improved.关键词：Mg Alloy;Die Casting;Heat Treatment;Mechanical Properties
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- 448
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- 14
发布时间：2023-12-18 - 摘要：The extrusion forming at different temperature was conducted for conventional ZA27 alloy and semi solid ZA27 alloy made by mechanical stirring. The original and water quenched microstructure of both billet reheated at 420 ℃,holding time 10 min were compared and analyzed.The results showed that the rose like α Al phase for semi solid extrusion formed billet reheated at 390～415 ℃ by extrusion forming was sphered and refined.As a results,due to smaller extrusion forming,both structure and apperance of the extruded piece were quit well satisfied.关键词：Semi solid Alloy;Extrusion Forming;Microstructure
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- 74
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发布时间：2023-12-18 - 摘要：The microstructure and properties of ZL201 alloy thin walled cylindric parts in extrusion casting were investigated. The results showed that ZL201 alloy is suitable for thin walled medium, light parts in extrusion casting. The thin walled cylinderic parts in extrusion casting has almost no casting defects and its and strength and plasticity increased by approximately 54%and 17% respectively and microstructure is more homogeneous than in sand casting. Plastic deformation of the thin walled cylindric parts takes place from surface to inner sides and there exists gradient change in microstructure during extrusion casting process.关键词：Thin walled Cylindric Parts;Extrusion Casting;ZL201 Alloy
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- 149
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发布时间：2023-12-18 - 摘要：The reason for shrinkage hole in light casting with isolated hot spot was analyzed. The shrinkage hole can be reduced and eliminated through increasing molding shell temperature and pouring temperature. The shrinkage hole can be decreased effectively through adopting different assembly tree schemes for different castings and adding round corner in casting also.关键词：Investment Casting;Shrinkage Hole;Pouring Temperature
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- 69
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发布时间：2023-12-18 - 摘要：The wax injection unit is the key equipment in investment casting. Characteristics of different types wax injection unit should be fully understood and various pattern materials, quality requirement for investment products, casting material and productive scale as well as casting size should be considered to conduct rational selection for wax injection unit.关键词：Investment Casting;Wax injection Unit;Pattern Materials
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- 245
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发布时间：2023-12-18 - 摘要：The technical process and characteristics as well as the selection of technical parameters related to shaped die manufacturing for squeezing casting in ceramic shell mold were investigated. Some problems often occurring in conventional ceramic were analyzed theoretically. Some advices on the shell mould, reclaimation of scrapped, ceramic water boiling of shell mold were proposed and approached.关键词：Casting in Ceramic Mold;Squeezing Casting;Die
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- 125
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发布时间：2023-12-18 - 摘要：The application and research situation of colloidal silica sol, especially progress in enhanced colloidal silica sol and the development of theory of colloidal silica sol, including stability and relationship between strength and the particle size of colloidal silica sol in investment casting were introduced. The developing tendency of colloidal silica sol was forecast.关键词：Colloidal Silica Sol;Enhanced Colloidal Silica Sol;Investment Casting
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- 773
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发布时间：2023-12-18 -
- 摘要：An excellent company devoted to art casting field whose products include large city sculpture, various size bronze art, was introduced. The goal of the company is become the top brand in China. The driving force of the development of company ought to continuously innovate and widely advertise for expert in art casting.关键词：Art Casting;Bronze;City Sculpture
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- 39
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发布时间：2023-12-18 - 摘要：The hardness and depth of chill layer on the roller outer surface can be raised with adding trace Bi into liquid Fe in centrifugal casting. The quallfied bi metal casting can be made through increasing properly the rotating speed of the mold and the preheating temperature of cast iron terminal piece, appending the asbestos shim, ensuring the weight of the iron melt pouring.关键词：Centrifugal Casting;Bi metal;Roller
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- 121
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发布时间：2023-12-18 - 摘要：The relationship between mechanical properties and amount of dendrite α as well as the approaches of increasing the amount and improving the morphology of primary α（Al） of the Al Si casting alloys were reviewed briefly. It was proposed that it is possible to improve further the mechanical properties with the increase of the amount of the dendrite α.关键词：Al Si Alloy;Dendrite α（Al）;Mechanical Properties
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- 182
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发布时间：2023-12-18 - 摘要：Deformation and fusion of thin walled copper tube inserted in water cooling plate for aluminum alloy during casting process were conducted. Based on some effective measures,including fixing copper tube in both opposite sides,cleaning outer surface of the tube,controlling pouring temperature,cooling water flowing through the copper tube,etc.,not only no clearance contact between copper tube and matrix material, but also copper tube’s integrality were ensured to fully meet technical requirement for highly qualified castings.关键词：Aluminum Alloy Casting;Al Cu Contact Structure;Water cooling Plate
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- 224
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发布时间：2023-12-18 - 摘要：Sand making core of turbine blade for aluminum alloy is more difficult. Sand core box for turbine blade was made using linear cutting. Sand core for the blade was made by hand drawing the pattern from core box. The way of core making is feasible on a medium scale production.关键词：Blade;Core Box;Linear Cutting
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- 63
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发布时间：2023-12-18 -
- 摘要：Effect of RE on damping property of ZA27 alloy has been studied. The results showed that the damping property of RE modified ZA27 alloy would be improved with the internal friction by 40% higher than that of un treated ZA27 alloy . ZA27 alloy has good damping property as frequency over 70 Hz and the RE modified alloy has the better effect of forced vibration attenuation than the unmodified ZA27 alloy.关键词：ZA27 Alloy;Rare Earth;Damping Property
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发布时间：2023-12-18 -
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