最新刊期
卷 33 ， 期 8 ， 2013
- 摘要：Effects of Sr addition on the microstructure and mechanical properties of the as-cast Al-7Si-Mg alloy have been investigated.The results indicate that the grain size is increased with the addition of Sr element,and the morphology of primary dendrite is transformed to columnar structure.With the increase of Sr addition,the morphology of eutectic Si is changed from coarse planar or acicular structure to fine fibrous one.Meanwhile,the Al-Si-Sr ternary phases can be observed in the alloy with gathered along the interface of eutectic and primary α-Al with 0.06% Sr.With 0.04% Sr addition,the tensile strength and elongation of the as-cast Al-7Si-Mg alloy reach a desirable value,increased by 8.4 MPa and by 68.4%,respectively,compared with those of the unmodified alloy.关键词：Al-7Si-Mg Alloy;Sr Addition;Microstructure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：The Ag-Cu-RE（Ce） amorphous films were prepared on surface of die casting aluminum alloy by high vacuum ion beam sputtering method to improve its surface roughness.SEM（scanning electron microscope） and AFM（atomic force microscope） were employed to observe the surface morphology of the films.The results reveal that the film surface exhibits uniform and smooth,which can prevent the pitting corrosion from aluminum alloy.Electrochemical measurements show that the corrosion potential of the films is significantly higher than that of the aluminum substrate.In the corrosion tests,the amorphous films can desirably protect the aluminum substrate as a result of absence of exfoliation,significantly improving the corrosion resistance of aluminum alloy.关键词：Die-Casting Aluminum Alloy;Amorphous Film;Corrosion Testing
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发布时间：2023-12-18 - 摘要：The Cu-0.4Cr-0.2Zr-0.15Mg alloy with sound structure was prepared using an improved medium frequency induction furnace.The tensile strength and elongation are increased by 30% and by 60%,respectively,compared with the initial specimen.The improvement mechanism of the strength and plasticity was analyzed by SEM（scanning electron microscope） and stress strain curve analysis.The analyses of SEM,TEM（transmission electron microscope） and EDS（energy dispersed spectrum） show that quadrate and spherical nano-scale Cr particles are distributed dispersedly in the copper matrix,and there exists Cu5Zr in Zr enrichment area,and Heusler phase CrCu2（Zr,Mg）can be observed in the copper matrix and Zr enrichment area.关键词：Cu-Cr-Zr-Mg;Vacuum Smelting;Microstructure
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发布时间：2023-12-18 - 摘要：The solidification behavior,hot cracking and microstructure of Al-7Zn-2.5Mg-Cu alloy were investigated with hot tear-linear contraction ZQS2000 twin bar tester for alloy,OM（optical microscope）,SEM（scanning electron microscope） and EDS（energy dispersive spectrometer）.The results show that the cooling rate and linear shrinkage of the alloy are rapidly increased firstly and then increased slowly during the solidification,and its shrinkage stress is generated and then increased dramatically with the dendrites formed a solid skeleton.The formation and propagation of the hot crack is located along the grain boundary of the α-Al matrix phase,which is depended on the rate of the proeutectic volumetric shrinkage and the ability of the liquid feeding before the eutectic reaction,and the eutectic shrinkage in the eutectic reaction process.The hot cracking tendency of the alloy is decreased with decrease of rate of the proeutectic volumetric shrinkage,the stronger ability of the liquid feeding as well as the less shrinkage of the eutectic.关键词：Al-Zn-Mg-Cu Alloys;Solidification;Hot Cracking;Mechanism
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发布时间：2023-12-18 - 摘要：A numerical model based on ANSYS software package was developed to simulate the DC casting process of aluminum alloy.Effects of semi-continuous parameters,such as duration time of initial velocity,pouring temperature,drawing velocity,wipe panel,on temperature fields and stress fields of ingot were investigated.The results show that with increasing in the duration time of initial casting speed,the meniscus shape tended to be stable is postponed.There exists obvious linearity relationship between sump depth and casting temperature or casting speed.Because of wipe panel increasing the ingot surface temperature to reduce the temperature difference of ingot heart and surface,the thermal stress in center of ingot is decreased greatly.关键词：Aluminum Alloys;DC Casting;Numerical Simulation;Casting Parameters;Sump;Thermal Stress
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发布时间：2023-12-18 - 摘要：The effects of different rolling rouths including cross rolling（CR）,differential speed rolling（DSR） and differential speed cross rolling（DSCR） on microstructure,mechanical properties and corrosion resistance of AZ31 magnesium alloy sheets were investigated.The results show that the mechanical properties and corrosion resistance of the alloy can be improved significantly as a result of controlling microstructure and basic texture by changing rolling rouths.Significant grain refinement and lower texture intensity can be obtained during DSCR as a result of the direction change of shear deformation,which consequently results in the higher mechanical properties and corrosion resistance than those of CRed and DSRed sheets.关键词：AZ31 Magnesium Alloy;Rolling Rouths;Texture;Mechanical Properties;Corrosion Resistance
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发布时间：2023-12-18 - 摘要：Based on fusion bonding and atomic interdiffusion between the liquid ceramic and Ti alloy,the laminated composites of the solidified TiB2 matrix ceramic with Ti-6Al-4V alloy were prepared by reaction processing in high-gravity field.XRD（X-ray diffraction）,FESEM（field emmission scanning electron microscope） and EDS（energy dispersive spectrmeter） results show that intensive self-toughening mechanisms initiated by fine platelets of TiB2 primary phases in the solidified ceramic presents a excellent combination of high flexural strength and high fracture toughness of TiC-TiB2 solidified fine grain ceramic composites.Meanwhile,as a result of fusion bonding between the liquid ceramic and Ti alloy in thermal-vacuum circumstances induced by reaction processing in high-gravity field,followed by intensive atomic interdiffusion between the liquid ceramic and liquid titanium,peritectic reaction of the solidified TiB2 and liquid Ti occurs at the final stage of material solidification,followed by direct growth of TiB solids from liquid Ti and subsequent eutectic reaction of TiB solids and liquid Ti,finally,the compsoites of the solidifed ceramic with Ti alloy were prepared in multiscale（micrometer/submicrometer/micro-nanomter） and multilevel（TiC-TiB2/TiC1-x-TiB-TiB2/TiB2-Ti-TiC1-x-TiB/TiB2-TiC1-x-TiB-Ti/TiB-TiC1-x-Ti/TiC1-x-Ti/Ti） characterized by the size and distribution of TiB phases.关键词：Layered Composites of Ceramic to Metal;Multiscale and Multilevel Composite;Reaction Processing in High-Gravity Field;Fusion Bonding;Atomic Interdiffusion
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发布时间：2023-12-18 - 摘要：The casting process of gear seat was simulated by the AnyCasting software.The results show that the casting defects exist in the gear seat ring.Aiming at the disadvantages of the initiall process,optimized measures were presented as follows:optimizing gating system and riser design,setting chills,etc.After optimization,the probability of defects was decreased greatly,and the technological yield was increased.关键词：Gear Seat;Gating System;Technological Yield
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发布时间：2023-12-18 - 摘要：Technical and feasibility investigation of the typecasting identification technology and system based on Android platform were conducted.The concept of typecasting’s formation and identification was described,and the frame structure of identification system was designed.Meanwhile,some key technologies including the typecasting’s identification,the development system and interface designation based on Andriod platform were developed.Android system as an open source operating system,is mainly used in intelligent mobile phone and other portable devices,which was beneficial for the timely access to data of the workshop.The typecasting’s recognition technology that is also called the technology of identifying image to text is an effective means of achieving the casting information and other relevant data fastly and accurately.关键词：Foundry Enterprises;Android Platform;Typecasting;Image Recognition
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发布时间：2023-12-18 - 摘要：The initial gating system of gear-box housing was simulated by finite element software.The parameters of the original process were presented as follows:pouring temperature of 1 420 ℃,negative pressure of-0.05 MPa.According to simulation results,filling time,solidification time and the distribution and size of potential shrinkage porosity in the casting were predicted.The modified gating system was designed and simulated to redure these defects.At the same processing parameters,the simulation results show that the shrinkage porosities（holes） are decreased by adopting the modified gating system.关键词：Gear-Box Housing;Designed of Gating System;Numerical Simulation;EPC
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发布时间：2023-12-18 - 摘要：The semi-solid ZL201 alloy slurry prepared by near-liquidus casting was thixo-extruded,and microstructure of the thixo-extruded parts was observed and analyzed comparatively with those of conventional casting ZL201 alloy parts and squeezing casting parts.The results reveal that microstructure of thixo-extruded parts exhibit fine and uniform with absence of macro-segregation and grain porosities,which are beneficial for improving the mechanical properties of ZL201 alloy parts.During thixo-extruded process,there exist severe grain deformation and distortion zone,leading to recrystallization fraction in semi-solid alloy slurry during dynamic recrystalliztion process higher than that in conventional casting ones,which is responsible for the fine uniform distribution of grain size in thixo-extruded parts关键词：ZL201 Alloy;Semi-solid;Near-Liquidus Casting;Extrusion Forming
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发布时间：2023-12-18 - 摘要：We have developed a set of power ultrasonic funnel-type double vibrating head equipment to prepare semi-solid A356 alloy slurry,and the effects of the relevant process parameters on the microstructure of semi-solid A356 alloy slurry were investigated.The A356 liquid aluminum at 590620 ℃ was poured into the funnel with adjusting the funnel angle and funnel slits combining at power ultrasonic double vibrating head treatment,and then was quenched in water.The specimens were cut at different position to observe microstructure after water quenching under the different conditions.The results show that average grain diameter and the average shape factor in outer microstructure reach about 30 μm and 0.84,respectively,with the angle of 60 ° to angle at 610 ℃.关键词：Power Ultrasonic;A356 Alloy;Semi-solid;Grain
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发布时间：2023-12-18 - 摘要：The low-cycle fatigue behavior of squeeze casting and gravity casting A356 alloys was investigated by the strain-controlled fatigue experiment,tensile testing,optical microscope（OM）,scanning electronic microscope（SEM）.The results show that the A356 alloy prepared exhibits cyclic strain hardening in both processing methods.With pressure,as a result of the smaller and dispersive needle-like silicon particles and the decrease of SDAS as well as elimination of the shrinkage and porosity in the squeeze casting alloy parts,the maximum values in cyclic stress response curve,the cyclic deformation resistance and low cycle fatigue life of the A356 alloy are increased.The plastic cyclic strain energy density is decreased with the increase of cyclic time in the alloy prepared by two kinds of methods.However,the cyclic time and the total energy consumption of the squeeze cast alloy are increased at the same strain amplitude condition comparing with the gravity cast alloy.关键词：Squeeze Casting;Gravity Casting;A356 Aluminium Alloy;Low Cycle Fatigue
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发布时间：2023-12-18 - 摘要：Origination of defects in bucket teeth in squeeze casting and its countermeasures were approached.The experimental results show that it is very important of processing parameters and structure design in squeezing casting on quality of squeezing casting bucket teeth.With the preheating temperature of die of 250±10 ℃,the pouring temperature of 1 620 ℃ and the forming pressure of 100 MPa for 17 s,through reasonably controlling the flow velocity in the ingate with sector structure,the defects occurred in bucket teeth by squeeze casting can be eliminated effectively.关键词：Squeeze Casting;Bucket Teeth;Casting Defect
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发布时间：2023-12-18 - 摘要：The microstructure and mechanical properties of ADC14 squeeze castings were analyzed.It is found that there exist porosities in the different location,and the porosity contents are increased with increasing in distance from the ingate.In addition,serious enrichment and segregation of the primary Si particles appeared in the central of the casting gauge parts,which should be responsible for the inferior mechanical properties.In the early solidification,non-equilibrium crystallization happens and a large number of primary phase α-Al is formed at the casting surface as a result of squeezing force and high cooling rate,resulting in Si enrichment in the residual liquid.Furthermore,during following solidification periods,the forced feeding flow resulted from squeeze force made the Si riched liquid flow to the center of the gauge part,which are responsible for the serious positive segregation of Si contents and particles there.关键词：Squeeze Casting;Hypereutectic Al-Si Alloy;Tensile Specimen;Si Particles Segregation
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发布时间：2023-12-18 - 摘要：During die casting large area and thin-walled aluminum alloy,some defects,such as cob webbing,warpage,cold shut and crack,occur in the die castings as a result of large area and thin wall,small change of parameters as well as unreasonable mold structure.Takes a large area and thin wall die casting as a typical example,through analyzing die casting parameters and mold structure,defects reason was described,and corresponding countermeasures were presented.关键词：Thin-walled;Die Casting;Defect Analysis;Countermeasures
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发布时间：2023-12-18 - 摘要：To solve the casting shrinkage hole especially hot spot away from riser shrinkage,it is an effective way to design riser subsidies.However,the riser subsidies not only increases the metal liquid weight but also decrease mechanical properties.In addition,removal of riser subsidies can deteriorate casting surface quality and waste a lot of time as well as difficult to design riser subsidies on some parts.Through experiment,rockwool subsidies instead of riser subsidies for shell of nut exhibits acceptable effects,which decreased keyhole rejects from 100% to 4% and the shrinkage rate of waste from 28% to 0.关键词：Investment Casting;Rock Wool Subsidies;Hot Shrinkage;Riser Subsidies
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发布时间：2023-12-18 - 摘要：<正>精铸不锈钢水龙头抛光后在表面显露出明显的黑点,严重影响不锈钢水龙头的质量。我公司以生产不锈钢水龙头为主,多年来通过在工艺上做一些改进,寻求解决或减少黑点数量的方法。1黑点的形状、种类及形成的原因
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发布时间：2023-12-18 - 摘要：1.4408 austenite stainless steel RZ15212 drainage disc with 5.7 kg in weight is composed of countersink,counterbore,sinking-groove,ring-counterbore,complex drainage outlet and drainage channel.There exists seven different shape process bars with 8 mm in depth.It is difficult to investment cast drainage disc due to its large planar structure.Different gating system-assembling tree design was considered.Through modifying gating process and adding process umbilical on the planar,designing a bracket to improve the deformation of mold shell,the RZ15212 drainage disc was produced successfully with a higher production rate.关键词：RZ15212 Drainage Disc for Multistage Pump;Sol Silicate;Investment Casting
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发布时间：2023-12-18 - 摘要：A method of designing vertical centrifuge casting template based on group technology was described,where series number N for the mold was determined,and according to an incremental method,the series mold tranche dimension was calculated.Meanwhile,the molds were classified according to similarity criterion to construct 6 kinds of template patterns.The dimension of the N gear series system was designed in mold template to ensure the integrity of the dimension of the mold design.The remaining technical elements and details are also arranged in the mould template.In addition,if need to form drawing,title bar and the layout can be set in the template.More than 90% of design work can be completed in the mold template.The mold design can been completed only input the information such as size,so the design efficiency is improved greatly.关键词：Vertical Centrifugal Casting;Large Mold;Group Technology;Template Design
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发布时间：2023-12-18 - 摘要：The method of utilizing color determining combining with scratch methods to determine whether the coating had been dried or not was investigated,which was proved to be stable and accurate through experiments.Based on this method,the results show that with increasing in size of refractory particle and decreasing in alcohol,phenol resin,F-80 added,the drying performance of the coating is improved.Therefore,the drying performance of coatings can be improved through controlling the component of coatings on the basis of other performances met.关键词：V-Casting;Foundry Coating;Drying Performance
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发布时间：2023-12-18 - 摘要：During QCr0.5 alloy internal oxidation,rare earth oxide powder was added in the oxide source to form rare earth atmosphere.After internal oxidation,the oxidation layer thickness,hardness and conductivity of the samples prepared were measured.In addition,the microstructure of the samples prepared was observed and analyzed.The results show that the oxidation layer and hardness of QCr0.5 alloy in rare earth atmosphere are higher than those without rare earths.Meanwhile,the electrical conductivity of QCr0.5 alloy is improved in rare earth atmosphere also.关键词：Rare Earth Atmosphere;QCr0.5 Alloy;Internal Oxidation
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发布时间：2023-12-18 - 摘要：Through the powder metallurgy method,the short carbon fiber reinforced copper matrix composites with different content of short carbon fiber were prepared including 2.5%、5.0%、7.5%、10.0%、12.5% and 15.0% in volumetric fraction,respectively.By means of MZL-500H friction wear testing machine,the effects of the short carbon fiber volume fraction and current density on tribological properties of the composites prepared were investigated.The results show that under the conditions of the fixed current density 0.315 A/mm2 and the fixed sliding speed 25 m/s as well as loading of 30 N,with the increase of carbon fiber content,the frictional coefficient of the composites is decreased firstly and then increased.Meanwhile,the composites prepared with copper coated short carbon fiber exhibit the more excellent friction coefficient than those without the copper coated short carbon fiber.The volume wear rate of the composites prepared with copper coated short carbon fiber is decreased firstly and then increased while the volume wear rate of the composites prepared without copper coated short carbon fiber is increased.With loading of 30 N and sliding speed of 25 m/s,the friction coefficient of the composites is decreased while the volume wear rate is increased with the increase of the current density.In addition,wear mechanism is transformed gradually toward the arc erosion.The composites with the 12.5% copper coated short carbon fiber exhibit the lower friction coefficient and volume wear rate than those with the 5% copper coated short carbon fiber.关键词：Carbon Fiber Reinforced Copper Matrix Composite Materials;Friction Coefficient;Wear
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发布时间：2023-12-18 - 摘要：Carbon steel/high chromium iron/carbon steel composite slabs were prepared by centrifugal casting process-hot rolling,and then carbon steel/high chromium iron compound plate was successfully prepared with one reduction at 1150℃ by hot rolling.The interface layer of composites and microstructure of high chromium iron were observed and analyzed by optical microscope and line scanning analysis,and microstructure evolution of high chromium iron under different strain rates was analyzed through thermal simulation test.The results show that there exists a clear transition zone in interface layer,and metallurgical bonding can be generated by chemical reactions.The carbide in high chromium iron is crushed and refined with change of the morphology.The refinement of carbide is attributed to the comprehensive effect of matrix’s plastic flow and carbide autolysis.关键词：Carbon Steel/High Chromium Iron;Centrifugal Casting;Hot Rolling;Carbide Refining
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发布时间：2023-12-18 - 摘要：Based on the empirical electron theory of solids and molecules,the valence electron structures of Ω、S and θ’ in Al-Cu-Mg-Ag alloys were calculated,and the relationship between the phases of Ω、S with θ’ and heat stability was analyzed with the help of the covalence electron pairs n A of the strongest covalence bond.It is shown that the value of nA of Ω、S and θ’ is 0.659 1,0.562 6 and 0.491 7,respectively,which is far bigger than that of the matrix α-Al and responsible for the second phase strengthening.The heat stability of Ω is higher than that of S and θ’,which is attributed to the higher covalence bond strength of Ω than that of S and θ’,so the nucleation of S and θ’ should be restrained to promote the nucleation of Ω as possible as to prepare Al-Cu-Mg-Ag alloys with better high-temperature properties.关键词：Al-Cu-Mg-Ag Alloys;Strengthening Phase;Valence Electron Structure;Heat Stability
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发布时间：2023-12-18 - 摘要：To improve mechanical properties of low pressure casting aluminum alloy wheels,Mg content in A356 aluminum alloy was modified slightly and T6 heat treatment process of A356 alloy was optimized to improve yield strength and elongation.Finally,impact resistance and fatigue resistance of the low pressure casting FA355 aluminum alloy wheel were improved.关键词：T6 Heat Treatment;Yield Strength;Low Pressure Casting
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发布时间：2023-12-18 - 摘要：Three QCr0.5 wires with initial diameters of 7 mm,5 mm and 3 mm were cold drawn through different drawing passes with average strains of 0.05 and 0.1,respectively,to obtain the samples with different strain rate.The hardness and electrical conductivity of the samples obtained were measured and the microstructures were observed to understand the effects of initial diameter and drawing passes on microstructures and properties of QCr0.5 wires.The results show that the electrical conductivity of the cold drawn samples with different initial diameters is decreased with increasing in the strain,where the samples with 7 mm have the maximum decrement value,the samples with 5 mm are the second,and samples with 3 mm have the lowest decrement value.The electrical conductivity of the samples with different drawing passes is decreased slowly with increasing in the strain under the same initial diameter,and the hardness is increased rapidly firstly,and then decreased slowly to a constant tendency.The decrease of electrical conductivity of the samples with average strain of 0.1 is more rapid than that one with the average strain of 0.05,and it is decreased by approximately 37%,however,the hardness is always the higher,where the highest hardness can reach to 114 HV.The microstructure observation reveals that the microstructure evolution of QCr0.5 is characterized by the uneven deformation of the internal and external structure,and the deformation degree of the external structure exhibits more severe.With the deformation increase,the deformation of internal and external structure tends to be homogeneous.关键词：QCr0.5 Wires;Strain;Initial Diameters;Drawing Passes;Electrical Conductivity;Hardness;Microstructure
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发布时间：2023-12-18 - 摘要：Effects of pulsed magnetic field on solidified structure and mechanical properties of H62 brass by changing pulse voltage and frequency were investigated.The results show that solidified structure and mechanical properties of H62 brass can be improved significantly by pulsed magnetic field.Solidified structure is transformed from complete dendrite to fragmented crystal.With the increase of pulse voltage or frequency,solidified structures is refined firstly and then coarsened.Meanwhile,both hardness and tensile strength are increased at first and then decreased.Compare with pulse voltage,the effect of pulse frequency is not obvious.关键词：Pulsed Magnetic Field;Brass;Solidified Structure;Mechanical Properties
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发布时间：2023-12-18 - 摘要：Amounts of gas holes（shrinkage holes）were generated in SAF2507 super duplex stainless steel DN1200 body produced by alkaline phenolic resin sand,resulting in the scrap as a result of not be welded from microstructure porosity.Based on analyzing the material characteristics,through adopting the middle-gating system and the high-performance heat riser to improve the surface temperature to postpone solidification time,the gas holes（porosities） in the valve body can be decreased greatly as a result of the complete exhaustion of gas in the liquid steel,obviously improving the quality of the valve body.关键词：Alkali Phenolic Resin;Gas Holes;Sand Exhaust System
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发布时间：2023-12-18 - 摘要：<正>透空镶嵌几何纹方镜（见下页）[1]战国（公元前475—前221年）长18.5cm,宽18.5cm质量929g锡青铜上海博物馆藏铜镜以圓形居多,方形较少。此方镜镜面和镜背分铸而成。镜面仅厚2mm,嵌在镜背方框内[1]。镜背主体纹饰为透空几何纹带,
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发布时间：2023-12-18 - 摘要：<正>为了实现牛津仪器集团公司用最大诚意回报中国客户的承诺,牛津仪器于2013年4月25日在上海发布首款专门为中国市场的中小型铸造企业量身定制的全进口平价光谱仪FOUNDRY-MASTER Xline,为铸造和金属制造商提供快速精确的金属样品检测,以确保最佳性能和品质。
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发布时间：2023-12-18 - 摘要：<正>财富中文网发布2013年中国500强排行榜。其中,本年度中国500强排行榜中中国冶金科工股份有限公司、江西铜业股份有限公司、中国铝业股份有限公司、五矿发展股份有限公司、铜陵有色金属集团股份有限公司、山东黄金矿业股份有限公
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发布时间：2023-12-18 - 摘要：<正>日前,工信部出台的《新材料产业标准化工作三年行动计划》提出,到2015年,完成200项重点标准制修订工作,立项并启动300项新材料标准研制,开展50项重点标准预研究,争取覆盖"十二五"规划提出的400个重点新材料产品,基本形成重点领域发展急需的、具有创新成果和国际水平的重要技术标准体系。力争通
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发布时间：2023-12-18 - 摘要：<正>据俄罗斯《公报》6月27日报道,日前,伦敦交易所铝、镍的价格降至2009年以来最低点,每吨镍的价格为13681美元,每吨铝的价格为1738美元。俄专家分析,有色金属国际价格下跌的主因是市场需求低迷,生产过剩。因此,中铝公司已宣布
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发布时间：2023-12-18 - 摘要：<正>近日,由吉林圆方机械集团有限公司投资2.2亿元建设的1万吨精密铸造项目在吉林省桦甸市正式投产。吉林圆方机械集团有限公司是以生产汽车底盘零件为主的汽车零部件生产企业,主导产品为汽
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发布时间：2023-12-18 - 摘要：<正>由中国机械工程学会铸造分会铸钢及熔炼技术委员会主办、河南科技大学承办的第十六届铸钢及熔炼学术年会暨第九届委员会工作会议,拟将于2013年9月20～22日在洛阳市举办,会议将针对铸钢新材料、新技术、新工艺的研究进展和前沿技术邀请国内著名专家学者和工程技术人员作专题报告。同时,进行铸钢新材
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发布时间：2023-12-18 - 摘要：<正>早在20世纪50年代,二六一大队就开始在相山开展铀矿地质勘查工作。经过几十年努力,相山已发展成我国最大的火山岩型铀矿田,被誉为"中国铀都",成为全国三大铀资源基地之一,也是中国南方唯一的铀资源大基地。近年来,二六一大队完成铀矿找矿项目18个,完成钻探工作量逾15万米,深部找矿取得了重大突破,并在
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发布时间：2023-12-18 - 摘要：<正>2013年7月2日,2013年中国国际铝工业展览会暨上海国际工业材料展览会开幕式在上海召开。来自30个国家和地区、450个参展商、约15000人参加了展会。国务院参事,中国有色金属工业协会会长陈全训在会上讲话,他说,当前中国铝工业处在重要发展机遇期,面临严峻挑战,中国的工业化、城镇化、
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发布时间：2023-12-18 - 摘要：<正>日前,包头装备园区内的铝合金铸造厂建设项目动工,预计12月底前可完成厂房建设。项目建成后,将形成年产铝合金装甲车辆铸件、航空航天铸件、动车铸件4100吨的能力。该项目由一机集团林峰特种铸造有限公司投资3亿元建设,占地面
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发布时间：2023-12-18 - 摘要：<正>2012年,中国铝业上市公司集体交上或亏损或净利大降的成绩单,而原铝产量依然是有色金属品种中增长最快的品种。据国家统计局公布的数据,2012年全年我国累计原铝产量1988.3万吨,同比增长13.2%。工信部数据显示:2012年末国内电解铝产能为2765万吨,产能利用率仅为72%。产业集中度低、产品同质化严重,企业只能靠拼产量来摊低成本,进一步加剧了产能过剩和无序竞争的恶性循环。未来铝业的产能必须减少,但减少的将首先是落后产能。
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发布时间：2023-12-18 - 摘要：<正>邯郸市宝特铸造有限公司是一家主要生产球墨铸铁管卡、卡环、法兰、高速铁路垫板、发动机飞轮、液压阀体、摇臂等汽车零部件产品的公司。该公司有时候会遇到产品在加工后出现气孔、砂眼、针孔大小的缺陷,用一般焊机维修焊补会导致咬边,烧坏本体,所以只能当废品报废。如何降低这样的废品率,降低成本一直是该公司急待解决的问题。
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发布时间：2023-12-18
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