最新刊期
卷 ， 期 6 ， 2001
- 摘要：The evolution of Si phase in Al Si alloy during solid solution treatment has been observed by SEM. The results showed that Si phase undergoes necking, stubbing, fragmentation and growth in the initial stage; and then the growth of Si phase is a coarsening process controlled by diffusion and follows LSW model; the morphology of Si phase deteriorates due to the occurrence of facets and lap in the final stage. The morphology of Si phase has a remarkable effect on mechanical properties of Al Si alloy by quantitative metallographical measurement and regression analysis.关键词：Al Si Alloy;Mechanical Properties;Evolution of Si Phase
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- 665
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- 21
发布时间：2023-12-18 - 摘要：The microstructure and properties as well as quality of Al Si alloy were obviously improved due to a heredity gene transferring to the structure of solidified solid Al Si alloy through different cold working deformation, natural aging treatment and remelting technology based on the heredity effect of microstructure and mechanical properties and its heredity mechanism. The various treated alloys have wide application prospects关键词：Eutectic Al Si Alloy;Heredity;Cold Working;Remelting
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- 193
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- 2
发布时间：2023-12-18 - 摘要：Mg RE（RE=La, Ce, Nd, Y） master alloy and the three experimental alloys, including Mg MM Zn Zr, Mg Nd Zn Zr and Mg Nd Y Zr, were prepared under flux protection and heat treated in atmospheric environment. Mechanical properties, including hardness, tensile strength and elongation, and the microstructures of alloy in different heat treated conditions were examined. The results showed that Nd, Y containing the experimental alloy have better heat treated strengthening effect so that its hardness and tensile strength were higher than those of conventional Mg MM Zn Zr alloy. Finely dispersed RE containing strengthening phase precipitated from super saturation solid solution phase not only raise the strength but also increase the ductility of Mg alloy,and then make alloys change from brittle fracture into tough fracture.关键词：Mg Alloy;RE;Microstructure and Properties
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- 255
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- 4
发布时间：2023-12-18 - 摘要：Influence of mischmetal addition on the properties of ZL108 alloy at ambient and high temperature was studied. The treatment technology and addition of mischmetal have been determined, and addition of w （mischmetal）=1.5% has optimum modification effect. The effect modified by mischmetal is similar to those of by sodium, but properties of mischmetal modified Al Si at high temperature are better. The dimensional stability and durality of w （mischmetal）=1.5% treated ZL108 alloy for the piston could meet the technical requirements for 492QS gasoline engine关键词：Gasoline Engine;Piston;Al Si Alloy;mischmetal Treatment
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- 83
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- 4
发布时间：2023-12-18 - 摘要：Surface oxidation film of Mg alloy casting in dry graphite silica sand mold was analyzed by XPS. The constituent and structure of surface oxidation film were discussed. The results showed that surface oxidation film of Mg alloy containing MgO and Mg（OH） 2 is lamellar structure. The oxidation film has better protective performance because a lot of C permeate into the surface oxidation to raise its compactness.关键词：Mg Alloy;Oxidation Film;Graphite silica Sand
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- 48
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- 1
发布时间：2023-12-18 - 摘要：Aimed at the existing problems in conventionam cast filtrated surface alloying, including liquid grey iron wettable to alloying coating and susceptivity to processing parameters,aided effect of a new cast filtration agent YB 1 for Al Si surface filtrated grey iron under different technological conditions was studied. The results showed that the 0.5%YB 1 cast filtration agent could improve the liquid grey iron wettability, and the qualified 1～ 2 mm Al and Si surface alloyed layer and excellent Robust processing could be obtained on the sample of 10～50 mm thickness at the 1 350～1 400 ℃ crupola iron melt in gravity casting. And the aided filtration mechanism of YB 1 was approached also.
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- 55
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- 1
发布时间：2023-12-18 - 摘要：The method for improving the microstructure of ZTi6Al4V alloy to raise the tensile properties and ligh cycling fatigue property was studied through three variants of α+β and β solid solution and structure broken up heat treatments to eliminate or reduce continuous α phase boundary in ZTi6Al4V alloy, which provided available base for expanding ZTi6Al4V alloy’s application field.关键词：Casting Ti Alloy;Heat Treatment;Mechanical Properties;Fatigue
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- 255
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- 5
发布时间：2023-12-18 -
- 摘要：The structure characteristics of zinc\|base bi\|metal bearing alloy was investigated.The comparative testing of a series of friction and wear characteristics of the alloy with Babbitts alloy（ZChSnSb11\|6）by means of MM\|200 type wear testing machine was conducted.The results showed that all of the properties of the zinc\|base bi\|metal bearing alloy were equivalent or superior to those of Babbitts alloy.It is helpful to replace Sn\|base bearing alloys
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- 122
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- 3
发布时间：2023-12-18 - 摘要：An axisymmetrical model for analysis of the heat transferr of metallic mold for pipe has been established by finite element simulation method on the basis of analyzing operation thermal condition of metallic mold for pipe. The change of temperature field and thermal stress field of 21CrMo10 metallic mold was analyzed using ANSYS software on the basis of disposed convection, radiation and contact boundary condition and latent heat of solidification in the model .The results of numerical simulation coincides with experimental results and actual damage condition in metallic mold for pipe.关键词：Metallic Mold;Finite Element Method;Temperature Field;Thermal Stress Field
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- 196
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- 2
发布时间：2023-12-18 - 摘要：Based on OpenGL technology, a general industrial standard for micro computer, 3D entities could be rotated and zoomed in real time and the enmeshment process could be displayed dynamically. Visualization effect of pre processing of foundry CAE software was enhanced, and a more friendly user interface could be provided.关键词：Foundry CAE;Pre processing;OpenGL Technology;Rotation and Zoom;Enmeshment Dynamical
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- 85
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- 5
发布时间：2023-12-18 - 摘要：CAD for molding tool of diesel engine block cylinder in static pressure casting was conducted using UGII software Sun SPARC station20. Based on the visibility and inspectility of 3D synthetic modeling, the problems in molding tool design, such as the accurate transference of inner cavity and outer surface from casting to molding tool, the optimum distribution of sand core for inner mold cavity and the inspection of assembly dimension of mold cavity, have been solved, which laid a foundation for CAM. Some key points and effective parameters in molding tool design have been offered too.
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- 41
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- 1
发布时间：2023-12-18 - 摘要：Smelting and casting technology for intermetallic compounds were introduced briefly. The research status and developing of structure materials of intermetallic compounds at high lemperature in Ni Al（containing NiAl and Ni 3Al）, Fe Al（containing Fe 3Al and FeAl） and TiAl 3 base systems were expounded. The existing problems and its resolution method for these alloys were analyzed. And the potential application in different fields was introduced.关键词：Ni Al Alloy System;Fe Al Alloy System;Ti 3Al Base Alloy;Intermetallic Compound
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- 1298
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- 24
发布时间：2023-12-18 - 摘要：The research and application status of high Al Zn alloy were surveyed. The research orientation in the future was proposed aimed at the existing problems in high Al Zn alloy application.关键词：High Al Zn Alloy;Heat Treatment;Modification
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- 466
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- 16
发布时间：2023-12-18 - 摘要：The progress of semi solid forming and application of Mg alloy were surveyed. Developing more simplified and practical forming technology and enhancing study on basic theory in this field, in the future, are proposed.关键词：Mg Alloy;Semi solid;Rheology Behavior
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- 169
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- 6
发布时间：2023-12-18 - 摘要：The formation mechanism of surface flow lines crack of investment stainless steel casting was analyzed in detail. A series of measures to prevent the surface flow lines crack were proposed based on the above analysis.The main reasans for crack formation were due to fine crack in inner surface of mold shell during wax lase and gas in mold cavify forced by steel melt into the crack.The effctive measures involved elevation of permeability in the mold shell and reduction of pollring temperature of steel meet.关键词：Investment Casting;Stainless Casting;Flow Lines Crack
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- 158
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- 1
发布时间：2023-12-18 - 摘要：The solidification process of high alloy steel pipe in centrifugal casting was analyzed. It is proposed that reducing heat release from the holes in the terminal covers,properly lowering pouring temperature and pouring velocity as well as intensely forced cooling of the mold were favorable for avoiding rills in inner surface. The change in spinning rate of the mold could prevent the cast pipe from the deformation.关键词：Centrifugal Casting;Rill;Deformation
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- 79
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- 2
发布时间：2023-12-18 - 摘要：The smelting, casting, forging and heat treatment of Cu Ti Sn Cr alloy were conducted. The industrial operation of the developed Cu Ti Sn Cr copper sleeve was carried out on running machine. The results showed that the sleeve could meet the technological requirements for horizontal continuous casting.
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- 116
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- 10
发布时间：2023-12-18 - 摘要：Due to a great deal of casting defects and high rejected rate for small cylindric carbon steel casting with H/D ≤2.0, main wall thickness δ ≤15 mm and single piece weight <10 kg, it is determined to change casting in sand mold to in investment casting with both top and bottom pouring for experimental comparison. Results showed that sound casting and more than 90% qualified rate could be obtained using rational bottom gating system and pouring process.关键词：Carbon Steel Casting;Cylinder;Investment Casting
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- 104
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- 1
发布时间：2023-12-18 - 摘要：The serious accentric and a lot of gas holes, porosities in the center for Cu scraped pole could lead to insufficient hardness and strength, lower wear resistance and electric conductivity. Change in cooling water entrance from single side to twin sides in the crystallizer could correct the accentric. Increase in inserted depth of crystallizer could eliminate gas hole and porosity.关键词：Copper Scraped Pole;Eccentric;Gas Hole;Porosity;Crystallizer
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- 86
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- 1
发布时间：2023-12-18 - 摘要：The structural characteristics and technique requirement for large aluminum impeller were expounded briefly. The casting technique with top gating system, outer shaped iron chill, compound casting mold and core assembly molding was used for producing aluminum impeller on a large scale successfully.关键词：Aluminum Impeller;Compound Mold;Core Assembly Molding;Shaped Iron Chill;Gating System
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- 141
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- 3
发布时间：2023-12-18 -
- 摘要：Use of Co 2O 3 surface inoculation, composite ceramic shell boned with silica sol and ethyl silicate and vacuum pouring in investment casting for heat resistance alloy was introduced and the results were analyzed briefly.关键词：Heat Resistance Alloy;Vane;Vacuum Investment Casting
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- 107
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- 1
发布时间：2023-12-18 -
- 摘要：Experimental analysis has been conducted for burr of casting caused by crackle of silica sol. The key reason and relevant technological parameten for this kind of defect was found. A definite effect was obtained through applying the experimental results to practical production.关键词：Investment Casting;Mold Shell;Crackle;Burr
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- 144
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- 0
发布时间：2023-12-18 - 摘要：The discussion on how to do the deblocking design of bronze statue attached plate, including tangential lines and areas of deblocking, the thickness of attached plate and the other factors for Guanyin Bronze statue with 34 m height was conducted. The strength and displacement of actual selected attached plates were assessed under designed wind speeds.关键词：Casting Bronze Statue;Bronze Attached Plate;Deblocking Design
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- 32
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发布时间：2023-12-18 -
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