最新刊期
卷 ， 期 4 ， 2002
- 摘要：Many activities in 40 years of foundation of foundry institution of Chinese mechanical engineering society were reviewed.The activities in foundry institution included three period,namely initialed,renewed,growth period.The review of the membership of the board committee,organized academy annual conference and the international conference,edited and published journal,exhibition as well as the international exchanges in every period was conducted.关键词：Foundry Institution;Academic Exchange;Development and Review
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发布时间：2023-12-18 - 摘要：The nucleation mechanism and transformation kinetics of in situ TiB 2 particulate reinforced aluminum matrix composite were expounded. The formation mechanism of TiB 2 particulate was analyzed from the thermodynamics and kinetics points of view. The transformation kinetics, reacted wettability and reacted activation energy of TiB 2 particwlate were approached based on diffusion theory.关键词：In situ;TiB 2 Particulate;Aluminum Matrix Composite;Nucleation Mechanism
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发布时间：2023-12-18 - 摘要：Effects of RE addition on the microstructure of in situ synthesized TiC p/Fe composite have been studied. The results showed that fine RE compound particles can be formed in Fe Ti C melt with the addition of RE, which promotes the heterogeneous nucleation of TiC particulate, leading to increase in size and decrease in quantity of in situ TiC particulate. Moreover, RE improves effectively the distribution of Fe 2Ti phase in microstructure and there is no obvious Fe 2Ti phase along the grain boundary, which is beneficial to improving properties of the materials.关键词：RE;TiC p/Fe Composite;Microstructure
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发布时间：2023-12-18 - 摘要：The formation of the microstructure and the evolution process from dendrite into equiaxed structure during atomized process for spray formed superalloy were analyzed. The results showed that the characteristic non dendritic equiaxed structures during deposition for spray formed materials were formed resultantly due to the fact that nuclei multiplication caused by dendrite fragmentation and remelting in semi liquid layer acted as effective nucleation sites for the formation of equiaxed structure in combination with the coalescing and coarsening of dendritic arm fragment as well as the homogenizing and coarsening of slightly deformed solid dendrite.关键词：Spray Forming;Dendrite Fragmentation;Microstructural Evolution
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发布时间：2023-12-18 - 摘要：The effects of strong pulsed magnetic field on the solidification microstructures of LY12 aluminum alloy were studied. It is showed that the solidification structures of LY12 aluminum alloy were changed remarkably and the strong pulsed magnetic treated grains in LY12 aluminum alloy were refined obviously. Otherwise, compared to un treated sample, the diffraction peaks of （111）, （200）, （311） and （222） crystal face in the X ray diffraction spectrum of magnetic treated sample were strengthened obviously.关键词：LY12 Aluminum Alloy;Pulsed Magnetic Field;Solidification Structure
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发布时间：2023-12-18 - 摘要：Influence of appropriate self developed extruded rod like RE, AlTi4C1 and AlTi5B1 master alloys on 1 100 aluminum plate and foil was studied through observing the microstructure and testing the mechanical properties. The results showed that the refinement with RE and AlTi4C1 master alloy for Al plate and foil is much greater than with AlTi5B1 master alloy, particularly the microstructure refined by AiTi4C1 is more homogeneous. And then the refining mechanism was discussed.关键词：RE;AlTi4C1;AlTi5B1;Grain Refinement;Mechanical Properties
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发布时间：2023-12-18 - 摘要：Wear resistance of VC Fe base surface composites was studied by means of SEM,EPMA, XRD with comparative experiment. The results showed that the V content, form and distribution of VC particulate have distinctly effect on the wear resistance of the surface composites.Higher V content and spheroidal VC particulate with homogeneous distribution in Fe base surface composites, have excellent wear resistance.关键词：Fe Base Surface Composites;Dry sliding Friction;Cast sintering;Wear resistance
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发布时间：2023-12-18 - 摘要：A new method of adding so called son mother ball lump of mixed powder grain refiner in Mg alloy was proposed. The microstructures refined with conventional and son mother ball lump of mixed powder refiners adding method in conventional AZ31 Mg alloy,were compared quantitatively. And the dispersing ways of carbon powder in melt during smelting were proposed briefly. Finally, the availability of the adding method was further verified for pure Mg. The result showed that the adding method can improve refining effect of C powder for Mg and its alloy with feasibility and susceptibility to operation.关键词：Son Mother Ball Lump of Mixed Powder;Grain Refining;Adding Way;Smelting
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发布时间：2023-12-18 - 摘要：A novel concept is adopted to design gating system based on the bottom pouring system with stable filling, in which the ingate outlet velocity is as the bottleneck to control the flow velocity of liquid metal in whole gating system. The filling velocity of the ingate should be limited to 0.5 m/s under the condition of full mold filling. Mold filling results of traditional top and new bottom gating system for conventional grey iron blade investment casting were compared. X ray real time radiographic system was used for observing the filling process. The results showed that 3 cracks and 30 inclusions in the cluster of 26 blades attributed filling turbulence in to top gating system while there are only 3 inclusions and no cracks because of stable mold filling in optimized bottom gating system.关键词：Gating System Design;Bottom Filling;Stable Filling
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发布时间：2023-12-18 - 摘要：The microstructure characteristics, macro and micro fracture morphology of brittle broken embedded casting closure of T9815 turbines were investigated by means of metallographical examination and SEM. The results showed that the blade rupture resulted from the red hot molten iron, washing out and carburizeing the stainless steel piece so as to decrease the strength of the blades insert position.关键词：Closure with Embedded Blade Casting;Rupture;Carburization
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发布时间：2023-12-18 -
- 摘要：The temperature field during solidification process was simulated by adopting 2D un stable heat transfer equation with an enthalpy formulation for latent heat. The solidified grain structure formation for K4169 superalloy was simulated by means of continuous nucleation model and kinetic model of dendrite tip growth （KGT model）. Coupling temperature field simulation with grain structure formation simulation, the characteristic parameters of solidified grain structures of the superalloy, including grain density and average grain size, were calculated. And the visualization of solidified grain structure by the computer has been performed. The results showed that the simulated results coincided well with the experimental results.关键词：Computer Simulation;Nucleation and Growth;Cellular Automata Technology;K4169 Superalloy
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- 252
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发布时间：2023-12-18 -
- 摘要：With the development of computer application technology, CAD/CAE technology has been extensively applied to design in different trade. The application of CAD/CAE to casting die for aluminum alloy wheel was introduced.关键词：Aluminum Alloy Wheel;Casting Die;CAD/CAE
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- 139
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发布时间：2023-12-18 - 摘要：Based on the analysis of the molten metal structure and Al 2O 3 film. the whole process of nucleation and growth of gas （hydrogen） in aluminum inclusion hydrogen system were expounded and the mutual parasitic mechanism between inclusions and hydrogen in molten aluminum was proposed.The existence of inclusions was the key restrictive factor to be difficult for full gas removal. So inclusion removal from molten aluminum was the fundamental step of hydrogen removal.关键词：Inclusion;Gas;Purification of Molten Aluminum;Parasitic Mechanism
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发布时间：2023-12-18 -
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- 摘要：Plasma microarc oxidation technology was used for in situ oxidized film ceramic coating on metallic surface. The ceramic coating prepared by the plasma microarc oxidation technology was characterized by wear resistance, corrosion resistance and thermal shock resistance at high temperature. The research status, basic theory ,technological features,the property of film and application of the technology to aluminum alloy for PMAO were introduced.关键词：Aluminum Alloy;Plasma Microarc Oxidation;Al 2O 3 Ceramic Coating
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- 248
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发布时间：2023-12-18 -
- 摘要：The concerns for 3rd Chinese international die casting exposition were expounded.Based on exhibited circumstances,the die casting machine,die,coating,die casting alloy as well as melting and holding furnace home and abroad were introduced and commented.关键词：Die Casting Machine;Die Casting Die;Die Casting Coating;Die Casting Alloy
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发布时间：2023-12-18 - 摘要：The mechanism and merit of powdery and granular release agent were expounded. The present commonly used spraying device and its operating principle were introduced briefly. The operating instruction for the advice and developing prospect have been suggested.关键词：Powdery Release Agent;Spraying Device;Vacuum Absorbent Transmitter
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- 62
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发布时间：2023-12-18 - 摘要：Semi solid rheoforming technology and equipment for Mg alloy were developed. The results showed that the crystal cells with 10～50μm in slurry was prepared by the twin screw stirring mixer with multi function whorled components and solid fraction of the slurry can be adjusted in the range of 5%～50%. The better match between continuous preparation and intermitten pouring of the slurry can be realized by using the device for heating, holding, rapid two way switch control storage and transportation of the slurry in sealed protection. The strength of semi solid rehoforming castings can be increased by over 20%.关键词：Mg Alloy;Semi solid;Rheoforming
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发布时间：2023-12-18 - 摘要：Reason of quality difference for the same die casting was analyzed. It is indicated that there exist two areas in mold filling process, namely, primary trunk die cavity and non primary trunk die cavity. The two areas are different in filling quality. The radical ways to improve die casting quality are conformable to the law with respect to die casting die design,especially the gating system design.关键词：Primary Trunk Die Cavity;Non primary Trunk Die Cavity;Injection Angle;Pressure Gradient
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发布时间：2023-12-18 - 摘要：Various factors related to the viscosity of silica sol, including SiO 2 content, temperature, pH value and shape, size and compactness of colloid, thickness of hydrated layer,electric charge electrolyte as well as polymetre etc.,were analyzed. Viscosity related to microstructure of silica sol is a key index for silica sol quality. Sufficient attention should be paid to the viscosity index in production and usage of silica sol.关键词：Silica Sol;Colloid;Viscosity
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发布时间：2023-12-18 - 摘要：The forming of expendable pattern, shell making, lost pattern, compaction and vacuum technologies of Replicast CS compound method （EPC CS） were studied. The problems of carburization in cast carbon steel, stainless steel in EPC can be resolved by means of this technology.关键词：Expendable Pattern;Compaction and Vacuum Technology;Carburization.
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发布时间：2023-12-18 - 摘要：The optimum proportion of water base coating for carbon steel castings in LFC was determined by selecting high Cr corundum refractory aggregate, oxidized starch and aluminum sulfate as the bonding agent through orthogonal experiment. The various properties of coating were tested and the coating was applied to be practical production.关键词：LFC;Carbon Steel Casting;High Cr Corundum;Water base Coating
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发布时间：2023-12-18 - 摘要：Influence of some alloying elements on the electrical conductivity of Al Si alloys was investigated. Silicon phase reduce the effective area of electrical conduction of aluminum matrix. Ti refines the grain and raise the boundary area of the grain so as to raise the electron wave dispersion. Mg, Cu, Mn etc. elements dissolved in aluminum matrix, making the crystal lattice distortion and leading to the increase of the probability of electron dispersion. All these elements reduce the electrical conductivity while Mg, Cu, Mn, Fe, Ti etc. elements to be formed in individual second phase have relatively slight effect on the electric conductivity of Al alloy. The electrical conductivity can increase by 5%～8% through proper composition adjustment of Al Si alloys.关键词：Aluminum Alloy;Electrical Conductivity;Chemical Composition
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发布时间：2023-12-18 -
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