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Modeling and simulation of 3D thermal stresses of large-sized castings in solidification processes 被引量:2
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作者 J.Q.Wang D.W.Yu +2 位作者 X.Sun S.F.Su B.Z.Li 《China Foundry》 SCIE CAS 2004年第S1期20-24,共5页
When heavy machines and large scaled receiver system of communication equipment are manufactured, it always needs to produce large-sized steel castings, aluminum castings and etc. Some defects of hot cracking by therm... When heavy machines and large scaled receiver system of communication equipment are manufactured, it always needs to produce large-sized steel castings, aluminum castings and etc. Some defects of hot cracking by thermal stress often appear during solidification process as these castings are produced, which results in failure of castings. Therefore predicting the effects of technological parameters for production of castings on the thermal stress during solidification process becomes an important means. In this paper, the mathematical models have been established and numerical calculation of temperature fields by using finite difference method (FDM) and then thermal stress fields by using finite element method (FEM) during solidification process of castings have been carried out. The technological parameters of production have been optimized by the results of calculation and the defects of hot cracking have been eliminated. Modeling and simulation of 3D thermal stress during solidification processes of large-sized castings provided a scientific basis, which promoted further development of advanced manufacturing technique. 展开更多
关键词 large-sized castings simulation of 3D temperature fields simulation of 3D thermal stress fields defect of hot cracking solidification process
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Major Companies Producing Large-Sized Castings and Their Capacity in Consecutive Three Years
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《China Foundry》 SCIE CAS 2008年第4期308-308,共1页
关键词 Co Major Companies Producing large-sized castings and Their Capacity in Consecutive Three Years
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Numerical simulation and processoptimization for producing large-sized castings 被引量:6
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作者 Wang Junqing Sun Xun +4 位作者 Guan Yang Wang Penghua Li Hailan Bai Limei Sun Xinzhi 《China Foundry》 SCIE CAS 2008年第3期179-185,共7页
3-Dvelocity and temperature fields of mold filling and solidification processes of large-sized castingswere calculated,and the efficiency and accuracy of numerical calculation were studied.The mold filling andsolidifi... 3-Dvelocity and temperature fields of mold filling and solidification processes of large-sized castingswere calculated,and the efficiency and accuracy of numerical calculation were studied.The mold filling andsolidification processes of large-sized stainless steel,iron and aluminum alloy castings were simulated by using ofnew scheme;their casting processes were optimized,and then applied to produce castings. 展开更多
关键词 数字模拟 铸造填充 凝固过程 不锈钢 铝合金
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I-DCGAN and TOPSIS-IFP:A simulation generation model for radiographic flaw detection images in light alloy castings and an algorithm for quality evaluation of generated images
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作者 Ming-jun Hou Hao Dong +7 位作者 Xiao-yuan Ji Wen-bing Zou Xiang-sheng Xia Meng Li Ya-jun Yin Bao-hui Li Qiang Chen Jian-xin Zhou 《China Foundry》 SCIE EI CAS CSCD 2024年第3期239-247,共9页
The intelligent detection technology driven by X-ray images and deep learning represents the forefront of advanced techniques and development trends in flaw detection and automated evaluation of light alloy castings.H... The intelligent detection technology driven by X-ray images and deep learning represents the forefront of advanced techniques and development trends in flaw detection and automated evaluation of light alloy castings.However,the efficacy of deep learning models hinges upon a substantial abundance of flaw samples.The existing research on X-ray image augmentation for flaw detection suffers from shortcomings such as poor diversity of flaw samples and low reliability of quality evaluation.To this end,a novel approach was put forward,which involves the creation of the Interpolation-Deep Convolutional Generative Adversarial Network(I-DCGAN)for flaw detection image generation and a comprehensive evaluation algorithm named TOPSIS-IFP.I-DCGAN enables the generation of high-resolution,diverse simulated images with multiple appearances,achieving an improvement in sample diversity and quality while maintaining a relatively lower computational complexity.TOPSIS-IFP facilitates multi-dimensional quality evaluation,including aspects such as diversity,authenticity,image distribution difference,and image distortion degree.The results indicate that the X-ray radiographic images of magnesium and aluminum alloy castings achieve optimal performance when trained up to the 800th and 600th epochs,respectively.The TOPSIS-IFP value reaches 78.7%and 73.8%similarity to the ideal solution,respectively.Compared to single index evaluation,the TOPSIS-IFP algorithm achieves higher-quality simulated images at the optimal training epoch.This approach successfully mitigates the issue of unreliable quality associated with single index evaluation.The image generation and comprehensive quality evaluation method developed in this paper provides a novel approach for image augmentation in flaw recognition,holding significant importance for enhancing the robustness of subsequent flaw recognition networks. 展开更多
关键词 light alloy casting flaw detection image generator DISCRIMINATOR comprehensive evaluation index
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基于Cast Designer的壳体铸件铸造工艺设计及智能优化
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作者 巩红涛 张怀章 +3 位作者 杨磊 杨国超 马永健 李丰 《热加工工艺》 北大核心 2024年第5期103-105,共3页
使用Cast Designer铸造仿真分析软件,通过可铸性评估系统DFM,完成浇冒系统的辅助设计,然后使用DOE技术和基于遗传算法GA的智能优化技术,评估不同工艺设计方案与铸造过程参数对壳体铸件质量的影响,分析在不同的冒口、冷铁和浇注温度条件... 使用Cast Designer铸造仿真分析软件,通过可铸性评估系统DFM,完成浇冒系统的辅助设计,然后使用DOE技术和基于遗传算法GA的智能优化技术,评估不同工艺设计方案与铸造过程参数对壳体铸件质量的影响,分析在不同的冒口、冷铁和浇注温度条件下得料率和缩孔量的关系。根据对DOE模拟结果的分析,发现顶冒口和侧冒口尺寸是影响得料率和缩孔量的关键因数,再利用遗传算法GA选择最佳设计方案和参数。通过帕累托曲线得到了生产壳体铸件的最优工艺方案。 展开更多
关键词 cast Designer 缩孔 质量控制 仿真分析
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Thermal and mechanical behavior of casting copper alloy wheel during wheel and belt continuous casting process
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作者 Kun Gao Yan Peng 《China Foundry》 SCIE EI CAS CSCD 2024年第1期82-90,共9页
To investigate the thermal and mechanical behavior of casting wheel,a two-dimensional thermoelastic-plastic finite element model was used to predict the temperature,stress and distortion distribution of the casting wh... To investigate the thermal and mechanical behavior of casting wheel,a two-dimensional thermoelastic-plastic finite element model was used to predict the temperature,stress and distortion distribution of the casting wheel during the wheel and belt continuous casting process.The effects of grinding thickness and casting speed on the thermal and mechanical behaviors of the center of the hot face of the casting wheel were discussed in detail.In each rotation,the casting wheel passes through four different spray zones.The results show that the temperature distribution of the casting wheel in different spray zones is similar,the temperature of the hot face is the highest and the temperature reaches the peak in the spray zoneⅢ.The stress and distortion depend on the temperature distribution,and the maximum stress and distortion of the hot face are 358.2 MPa and 1.82 mm,respectively.The temperature at the center of the hot face decreases with increasing grinding thickness and increases with increasing casting speed. 展开更多
关键词 casting wheel finite element model grinding thickness casting speed hot face spray zones
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Experimental observations on the nonproportional multiaxial ratchetting of cast AZ91 magnesium alloy at room temperature
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作者 Binghui Hu Yu Lei +3 位作者 Hang Li Ziyi Wang Chao Yu Guozheng Kang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第5期1115-1125,共11页
The nonproportional multiaxial ratchetting of cast AZ91 magnesium (Mg) alloy was examined by performing a sequence of axial-torsional cyclic tests controlled by stress with various loading paths at room temperature (R... The nonproportional multiaxial ratchetting of cast AZ91 magnesium (Mg) alloy was examined by performing a sequence of axial-torsional cyclic tests controlled by stress with various loading paths at room temperature (RT).The evolutionary characteristics and path dependence of multiaxial ratchetting were discussed.Results illustrate that the cast AZ91 Mg alloy exhibits considerable nonproportional additional softening during cyclic loading with multiple nonproportional multiaxial loading paths;multiaxial ratchetting presents strong path dependence,and axial ratchetting strains are larger under nonproportional loading paths than under uniaxial and proportional45°linear loading paths;multiaxial ratchetting becomes increasingly pronounced as the applied stress amplitude and axial mean stress increase.Moreover,stress-strain curves show a convex and symmetrical shape in axial/torsional directions.Multiaxial ratchetting exhibits quasi-shakedown after certain loading cycles.The abundant experimental data obtained in this work can be used to develop a cyclic plasticity model of cast Mg alloys. 展开更多
关键词 cast magnesium alloy RATCHETTING multiaxial loading loading path stress level
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To improve robustness of mechanical properties of semi-solid cast A356 alloy using taguchi design method
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作者 Yi-wu Xu Hong-yi Zhan +4 位作者 Wei Tong Jin-ping Li Le-peng Zhang De-jiang Li Xiao-qin Zeng 《China Foundry》 SCIE EI CAS CSCD 2024年第2期175-184,共10页
Mechanical properties of semi-solid casting are dependent on multiple processing parameters,and improper processing parameters will not only reduce mean data but also increase variations.The present study investigated... Mechanical properties of semi-solid casting are dependent on multiple processing parameters,and improper processing parameters will not only reduce mean data but also increase variations.The present study investigated the impact of parameters in slurry preparation and heat treatment on the yield strength and ductility of T6 heat-treated A356 Al-Si alloy using rapid slurry forming(RSF)semi-solid casting.The focus was primarily on the robustness of mechanical properties based on Taguchi design method.By analyzing signal-to-noise ratio and minimum value calculated from-3S,the optimum slurry preparation parameters and heat treatment parameters were determined to be no quench,enthalpy exchange material(EEM)temperature of 140℃,EEM-to-melt ratio of 6mass%,stirring time of 18 s,solution heat treated at 520℃ for 2 h,and ageing heat treated at 190℃ for 6 h.In a small batch validation,the-3S yield strength and-3S elongation reach 256.1 MPa and 5.03% respectively,showing a satisfactory robustness.The hardness and microstructure of heat-treated samples with the best and worst properties were characterized to gain insight into the underlying mechanisms affecting the mean value and variations of mechanical properties. 展开更多
关键词 semi-solid casting taguchi design method signal-to-noise ratio mechanical property MICROSTRUCTURE
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Irregular initial solidification by mold thermal monitoring in the continuous casting of steels:A review
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作者 Qiuping Li Guanghua Wen +3 位作者 Fuhang Chen Ping Tang Zibing Hou Xinyun Mo 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第5期1003-1015,共13页
Occasional irregular initial solidification phenomena,including stickers,deep oscillation marks,depressions,and surface cracks of strand shells in continuous casting molds,are important limitations for developing the ... Occasional irregular initial solidification phenomena,including stickers,deep oscillation marks,depressions,and surface cracks of strand shells in continuous casting molds,are important limitations for developing the high-efficiency continuous casting of steels.The application of mold thermal monitoring(MTM) systems,which use thermocouples to detect and respond to temperature variations in molds,has become an effective method to address irregular initial solidification phenomena.Such systems are widely applied in numerous steel companies for sticker breakout prediction.However,monitoring the surface defects of strands remains immature.Hence,indepth research is necessary to utilize the potential advantages and comprehensive monitoring of MTM systems.This paper summarizes what is included in the irregular initial solidification phenomena and systematically reviews the current state of research on these phenomena by the MTM systems.Furthermore,the influences of mold slag behavior on monitoring these phenomena are analyzed.Finally,the remaining problems of the formation mechanisms and investigations of irregular initial solidification phenomena are discussed,and future research directions are proposed. 展开更多
关键词 irregular initial solidification mold thermal monitoring continuous casting mold slag THERMOCOUPLE
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Data-driven casting defect prediction model for sand casting based on random forest classification algorithm
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作者 Bang Guan Dong-hong Wang +3 位作者 Da Shu Shou-qin Zhu Xiao-yuan Ji Bao-de Sun 《China Foundry》 SCIE EI CAS CSCD 2024年第2期137-146,共10页
The complex sand-casting process combined with the interactions between process parameters makes it difficult to control the casting quality,resulting in a high scrap rate.A strategy based on a data-driven model was p... The complex sand-casting process combined with the interactions between process parameters makes it difficult to control the casting quality,resulting in a high scrap rate.A strategy based on a data-driven model was proposed to reduce casting defects and improve production efficiency,which includes the random forest(RF)classification model,the feature importance analysis,and the process parameters optimization with Monte Carlo simulation.The collected data includes four types of defects and corresponding process parameters were used to construct the RF model.Classification results show a recall rate above 90% for all categories.The Gini Index was used to assess the importance of the process parameters in the formation of various defects in the RF model.Finally,the classification model was applied to different production conditions for quality prediction.In the case of process parameters optimization for gas porosity defects,this model serves as an experimental process in the Monte Carlo method to estimate a better temperature distribution.The prediction model,when applied to the factory,greatly improved the efficiency of defect detection.Results show that the scrap rate decreased from 10.16% to 6.68%. 展开更多
关键词 sand casting process data-driven method classification model quality prediction feature importance
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A Dual Closed-Loop Digital Twin Construction Method for Optimizing the Copper Disc Casting Process
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作者 Zhaohui Jiang Chuan Xu +3 位作者 Jinshi Liu Weichao Luo Zhiwen Chen Weihua Gui 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2024年第3期581-594,共14页
The copper disc casting machine is core equipment for producing copper anode plates in the copper metallurgy industry.The copper disc casting machine casting package motion curve(CPMC) is significant for precise casti... The copper disc casting machine is core equipment for producing copper anode plates in the copper metallurgy industry.The copper disc casting machine casting package motion curve(CPMC) is significant for precise casting and efficient production.However,the lack of exact casting modeling and real-time simulation information severely restricts dynamic CPMC optimization.To this end,a liquid copper droplet model describes the casting package copper flow pattern in the casting process.Furthermore,a CPMC optimization model is proposed for the first time.On top of this,a digital twin dual closed-loop self-optimization application framework(DT-DCS) is constructed for optimizing the copper disc casting process to achieve self-optimization of the CPMC and closed-loop feedback of manufacturing information during the casting process.Finally,a case study is carried out based on the proposed methods in the industrial field. 展开更多
关键词 Copper disc casting machine digital twin(DT) mechanism modeling SELF-OPTIMIZATION
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Effect of phosphorus content on interfacial heat transfer and film deposition behavior during the high-temperature simulation of strip casting
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作者 Wanlin Wang Cheng Lu +5 位作者 Liang Hao Jie Zeng Lejun Zhou Xinyuan Liu Xia Li Chenyang Zhu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第5期1016-1025,共10页
The interfacial wettability and heat transfer behavior are crucial in the strip casting of high phosphorus-containing steel.A hightemperature simulation of strip casting was conducted using the droplet solidification ... The interfacial wettability and heat transfer behavior are crucial in the strip casting of high phosphorus-containing steel.A hightemperature simulation of strip casting was conducted using the droplet solidification technique with the aims to reveal the effects of phosphorus content on interfacial wettability,deposited film,and interfacial heat transfer behavior.Results showed that when the phosphorus content increased from 0.014wt%to 0.406wt%,the mushy zone enlarged,the complete solidification temperature delayed from1518.3 to 1459.4℃,the final contact angle decreased from 118.4°to 102.8°,indicating improved interfacial contact,and the maximum heat flux increased from 6.9 to 9.2 MW/m2.Increasing the phosphorus content from 0.081wt%to 0.406wt%also accelerated the film deposition rate from 1.57 to 1.73μm per test,resulting in a thickened naturally deposited film with increased thermal resistance that advanced the transition point of heat transfer from the fifth experiment to the third experiment. 展开更多
关键词 strip casting interfacial heat transfer interfacial wettability naturally deposited film phosphorus content
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CAST/EiJ小鼠外周血和脾中免疫细胞及亚群分析
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作者 刘琪 侯勇志 +5 位作者 李娜 张京京 陆佳涵 丛喆 朱林 薛婧 《中国比较医学杂志》 CAS 北大核心 2024年第4期1-10,共10页
目的探索CAST/EiJ小鼠对多种病原体易感的可能原因,分析CAST/EiJ小鼠外周血和脾内的免疫细胞表型,明确CAST/EiJ小鼠的免疫细胞构成。方法利用流式细胞术,通过细胞表面标记物CD3、CD4、CD8、CD11b、CD11c、CD19、CD27、CD49b和TCRβ检测C... 目的探索CAST/EiJ小鼠对多种病原体易感的可能原因,分析CAST/EiJ小鼠外周血和脾内的免疫细胞表型,明确CAST/EiJ小鼠的免疫细胞构成。方法利用流式细胞术,通过细胞表面标记物CD3、CD4、CD8、CD11b、CD11c、CD19、CD27、CD49b和TCRβ检测CAST/EiJ小鼠和C57BL/6J小鼠外周血和脾内经典型树突状细胞(cDCs)、自然杀伤细胞(NK)、B淋巴细胞、T淋巴细胞及其亚群的细胞比例。结果CAST/EiJ小鼠与C57BL/6J小鼠的cDCs细胞比例无明显差异,但cDC1细胞亚群比例偏低;CAST/EiJ小鼠的NK细胞(主要是成熟NK细胞亚群)和T淋巴细胞(主要是CD8+T细胞)比例都显著低于C57BL/6J小鼠,而CAST/EiJ小鼠的B淋巴细胞比例高于C57BL/6J小鼠。结论CAST/EiJ小鼠中NK和T淋巴细胞比例显著低于C57BL/6J小鼠。 展开更多
关键词 cast/EiJ小鼠 C57BL/6J小鼠 经典型树突状细胞 自然杀伤细胞 B淋巴细胞 T淋巴细胞
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Compression properties of cost-efficient porous expanded clay reinforced AA7075 syntactic foams fabricated by industrial-oriented die casting technology
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作者 İsmail Cem Akgün Çağın Bolat Ali Gökşenli 《China Foundry》 SCIE EI CAS CSCD 2024年第1期60-70,共11页
In today’s manufacturing industries,hard competition between rival firms makes it compulsory for researchers to design lighter and cheaper machine components due to the megatrends of cost-effectiveness and anti-pollu... In today’s manufacturing industries,hard competition between rival firms makes it compulsory for researchers to design lighter and cheaper machine components due to the megatrends of cost-effectiveness and anti-pollution.At this point,aluminum syntactic foams(ASFs)are new-generation engineering composites and come into the upfront as a problem-solver.Owing to their features like low density,sufficient elongation,and perfect energy absorption ability,these advanced foams have been considerably seductive for many industrial sectors nowadays.In this study,an industrial-oriented automatic die casting technology was used for the first time to manufacture the combination of AA7075/porous expanded clay(PEC).Micro evaluations(optical and FESEM)reveal that there is a homogenous particle distribution in the foam samples,and inspections are compatible with the other ASF studies.Additionally,T6 aging heat treatment was operated on one half of the produced foams to explore the probable impact of aging on the compressive responses.Attained results show that PEC particles can be an alternative to expensive hollow spheres used in the previous works.Besides,a favorable relationship is ascertained between the aging treatment and mechanical properties such as compression strength and plateau strength. 展开更多
关键词 die casting porous materials metal matrix sytanctic foams expanded clay compressive deformation
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Effect of slow shot speed on externally solidified crystal,porosity and tensile property in a newly developed high-pressure die-cast Al-Si alloy
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作者 Wen-ning Liu Wei Zhang +6 位作者 Peng-yue Wang Yi-xian Liu Xiang-yi Jiao Ao-xiang Wan Cheng-gang Wang Guo-dong Tong Shou-mei Xiong 《China Foundry》 SCIE EI CAS CSCD 2024年第1期11-19,共9页
The effect of slow shot speed on externally solidified crystal(ESC),porosity and tensile property in a newly developed high-pressure die-cast Al-Si alloy was investigated by optical microscopy(OM),scanning electron mi... The effect of slow shot speed on externally solidified crystal(ESC),porosity and tensile property in a newly developed high-pressure die-cast Al-Si alloy was investigated by optical microscopy(OM),scanning electron microscopy(SEM)and laboratory computed tomography(CT).Results showed that the newly developed AlSi9MnMoV alloy exhibited improved mechanical properties when compared to the AlSi10MnMg alloy.The AlSi9MnMoV alloy,which was designed with trace multicomponent additions,displays a notable grain refining effect in comparison to the AlSi10MnMg alloy.Refining elements Ti,Zr,V,Nb,B promote heterogeneous nucleation and reduce the grain size of primaryα-Al.At a lower slow shot speed,the large ESCs are easier to form and gather,developing into the dendrite net and net-shrinkage.With an increase in slow shot speed,the size and number of ESCs and porosities significantly reduce.In addition,the distribution of ESCs is more dispersed and the net-shrinkage disappears.The tensile property is greatly improved by adopting a higher slow shot speed.The ultimate tensile strength is enhanced from 260.31 MPa to 290.31 MPa(increased by 11.52%),and the elongation is enhanced from 3.72%to 6.34%(increased by 70.52%). 展开更多
关键词 hypoeutectic Al-Si alloy high pressure die casting POROSITY externally solidified crystal tensile property
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Effect of casting process on the inner-wall band segregation of high-strength antisulfur pipes
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作者 LUO Ming ZHANG Zhonghua 《Baosteel Technical Research》 CAS 2024年第1期27-36,共10页
Controlling inner-wall band segregation is one of the difficulties in the production of high-strength antisulfur pipes.Comparative tests were carried out on different casting processes(superheat,mold electromagnetic s... Controlling inner-wall band segregation is one of the difficulties in the production of high-strength antisulfur pipes.Comparative tests were carried out on different casting processes(superheat,mold electromagnetic stirring,end electromagnetic stirring,casting speed and soft reduction)for the smelting of high-strength antisulfur pipes.The microstructures of continuous-casting billets and hot-rolled or tempered pipes were analyzed using a metallographic microscope and scanning electron microscope.The mechanism and evolution law regarding the inner-wall band segregation of high-strength antisulfur pipes were studied,and the influence of different casting processes was explored. 展开更多
关键词 high strength antisulfur pipe casting process spot segregation band segregation
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Application of Thermodynamic Database to Corrosion of ZrO_(2) Containing Submerged Entry Nozzle in Steel Continuous Casting Process
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作者 In-Ho JUNG 《China's Refractories》 CAS 2024年第2期10-15,共6页
The CALPHAD thermodynamic databases are very useful to analyze the complex chemical reactions happening in high temperature material process.The FactSage thermodynamic database can be used to calculate complex phase d... The CALPHAD thermodynamic databases are very useful to analyze the complex chemical reactions happening in high temperature material process.The FactSage thermodynamic database can be used to calculate complex phase diagrams and equilibrium phases involving refractories in industrial process.In this study,the FactSage thermodynamic database relevant to ZrO_(2)-based refractories was reviewed and the application of the database to understanding the corrosion of continuous casting nozzle refractories in steelmaking was presented. 展开更多
关键词 thermodynamic database ZrO_(2) containing submerged entry nozzle continous casting
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Mechanical Evaluation of AZ80 Magnesium Alloy in Cast Wrought Form
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作者 Peilin Ying Anita Hu +1 位作者 Wutian Shen Henry Hu 《Journal of Materials Science and Chemical Engineering》 2024年第4期119-125,共7页
Wrought magnesium alloy AZ80 with a thick section of 20 mm was prepared by squeeze casting (SC) and permanent steel mold casting (PSMC). The porosity measurements of the SC and PSMC depicted that SC AZ80 had a pore co... Wrought magnesium alloy AZ80 with a thick section of 20 mm was prepared by squeeze casting (SC) and permanent steel mold casting (PSMC). The porosity measurements of the SC and PSMC depicted that SC AZ80 had a pore content of 0.52%, which was 77% lower than 2.21% of PSMC AZ80 counterpart. The YS, UTS, e<sub>f</sub>, E and strengthening rate of cast AZ80 were determined by mechanical pulling. The engineering stress versus strain bended lines showed that SC AZ80 had a YS of 84.7 MPa, a UTS of 168.2 MPa, 5.1% in e<sub>f</sub>, and 25.1 GPa in modulus. But, the YS, UTS and e<sub>f</sub> of the PSMC AZ80 specimen were only 71.6 MPa, 109.0 MPa, 1.9% and 21.9 GPa. The findings of the mechanical pulling evidently depicted that the YS, UTS, e<sub>f</sub> and E of SC AZ80 were 18%, 54%, 174% and 15% higher than PSMC counterpart. The computed resilience and toughness suggested that the SC AZ80 exhibited greater resistance to tensile loads during elastic deformation and possessed higher capacity to absorb energy during plastic deformation compared to the PSMC AZ80. At the beginning of permanent change, the strengthening rate of SC AZ80 was 10,341 MPa, which was 9% greater than 9489 MPa of PSMC AZ80. The high mechanical characteristics of SC AZ80 should be primarily attributed to its low porosity level. . 展开更多
关键词 Squeeze casting Wrought Magnesium Alloy AZ80 POROSITY Tensile Prop-erties
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某污水处理厂CAST工艺排泥水处理系统改造实践与思考
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作者 罗皓百 苏泽林 +1 位作者 张樱荠 吴章雁 《清洗世界》 CAS 2024年第3期34-36,73,共4页
某污水处理厂总设计规模为10万m^(3)/d,一期采用改良氧化沟工艺,二期采用CAST工艺。由于二期CAST生物池排泥效率不高,储泥池排泥不彻底,带式浓缩脱水一体机剩余污泥絮凝效果不佳,严重影响正常的生产运行。针对排泥水处理系统运行中存在... 某污水处理厂总设计规模为10万m^(3)/d,一期采用改良氧化沟工艺,二期采用CAST工艺。由于二期CAST生物池排泥效率不高,储泥池排泥不彻底,带式浓缩脱水一体机剩余污泥絮凝效果不佳,严重影响正常的生产运行。针对排泥水处理系统运行中存在的问题,文中提出了具体改造建议。结合运行管理经验,对产生问题的原因进行剖析与思考,为其他污水处理厂CAST工艺排泥水处理系统类似问题提供解决思路。 展开更多
关键词 污水处理厂 cast工艺 排泥水处理系统 改造 实践与思考
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基于ProCAST铝合金压板铸造工艺优化设计
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作者 马仕祥 《中国铸造装备与技术》 CAS 2024年第3期93-97,共5页
利用铸造模拟软件ProCAST对承力索座压板凝固过程进行模拟,通过对铸件成形过程当中的速度场与温度场的变化规律进行分析,得出铸件内部缺陷所在位置及产生的原因,对铸造工艺进行优化设计。通过公式计算,将内浇口的横截面积增大到135 mm^(... 利用铸造模拟软件ProCAST对承力索座压板凝固过程进行模拟,通过对铸件成形过程当中的速度场与温度场的变化规律进行分析,得出铸件内部缺陷所在位置及产生的原因,对铸造工艺进行优化设计。通过公式计算,将内浇口的横截面积增大到135 mm^(2),直浇道的高度增加到120 mm。对优化后的方案进行模拟验证,结果表明:优化浇注系统的结构和横截面积,确保了铝液在充型凝固时,有良好的补缩通道使高温铝液对缺陷部位能够及时进行补缩,从而消除铸件内部缺陷,使产品合格率得到大幅提高;通过使用ProCAST软件,不仅大大缩短了试验周期,降低了生产成本,也为产品后续的改进提供了理论依据,实现了良好的经济效益。 展开更多
关键词 腕臂支撑装置 金属型重力铸造 PROcast 工艺优化
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