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中国铸造
沈阳铸造研究所
中国铸造

沈阳铸造研究所

葛晨光

双月刊

1672-6421

sqwmb@shengquan.com

024-25847830

110022

沈阳市铁西区云峰南街17号

中国铸造/Journal China FoundryCSTPCDCSCD北大核心SCI
查看更多>>本刊以刊登铸造领域最新科研成果、铸造业发展动态、铸造市场和商务信息为主。旨在宣传中国铸造领域的发展状况，为国外科研院所、企业了解中国铸造行业，进一步增进学术交流与技术合作提供了一个有效的平台。
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    Advancements in machine learning for material design and process optimization in the field of additive manufacturing

    Hao-ran ZhouHao YangHuai-qian LiYing-chun Ma...
    101-115页
    查看更多>>摘要：Additive manufacturing technology is highly regarded due to its advantages,such as high precision and the ability to address complex geometric challenges.However,the development of additive manufacturing process is constrained by issues like unclear fundamental principles,complex experimental cycles,and high costs.Machine learning,as a novel artificial intelligence technology,has the potential to deeply engage in the development of additive manufacturing process,assisting engineers in learning and developing new techniques.This paper provides a comprehensive overview of the research and applications of machine learning in the field of additive manufacturing,particularly in model design and process development.Firstly,it introduces the background and significance of machine learning-assisted design in additive manufacturing process.It then further delves into the application of machine learning in additive manufacturing,focusing on model design and process guidance.Finally,it concludes by summarizing and forecasting the development trends of machine learning technology in the field of additive manufacturing.
      原文链接:
    • 万方数据
    • 维普

    Oxidation behavior of 4774DD1 Ni-based single-crystal superalloy at 980 ℃ in air

    Yu FangYa-zhou LiQiang YangQun-gong He...
    116-124页
    查看更多>>摘要：The oxidation behavior of a novel Ni-based single-crystal 4774DD1 superalloy for industrial gas turbine applications was investigated by the isothermal oxidation at 980 ℃ and discontinuous oxidation weight gain methods.The phase constitution and morphology of surface oxides and the characteristics of the cross-section oxide film were analyzed by XRD,SEM and EDS.Results show that the oxidation kinetics of the 4774DD1 superalloy follows the cubic law,indicating its weak oxidation resistance at this temperature.As the oxidation time increases,the composition of the oxide film evolves as following:One layer consisting of a bottom Al2O3 sublayer and an upper(Al2O3+NiO)mixture sublayer after oxidized for 25 h.Then,two layers composed of an outermost small NiO discontinuous grain layer and an internal layer for 75 h.This internal layer is consisted of the bottom Al2O3 sublayer,an intermediate narrow CrTaO4 sublayer,and an upper(Al2O3+NiO)mixture sublayer.Also two layers comprising an outermost relative continuous NiO layer with large grain size and an internal layer as the oxidation time increases to 125 h.This internal layer is composed of the upper(Al2O3+NiO)mixture sublayer,an intermediate continuous(CrTaO4+NiWO4)mixture sublayer,and a bottom Al2O3 sublayer.Finally,three layers consisting of an outermost(NiAl2O4+NiCr2O4)mixture layer,an intermediate(CrTaO4+NiWO4)mixture layer,and a bottom Al2O3 layer for 200 h.
      原文链接:
    • 万方数据

    Phase-field lattice-Boltzmann study on fully coupled thermal-solute-convection dendrite growth of Al-Cu alloy

    Yin-qi QiuMeng-wu WuXun-peng QinShou-mei Xiong...
    125-136页
    查看更多>>摘要：Dendrite growth is a complex liquid-solid phase transition process involving multiple physical factors.A phase-field lattice-Boltzmann method was developed to simulate the two-and three-dimension dendrite growth of Al-Cu alloy.The effect of fully coupled thermal-solute-convection interaction on the dendrite growth was investigated by incorporating a parallel-adaptive mesh refinement algorithm into the numerical model.By accurately reproducing the latent heat release,solute diffusion and convective transport behaviors at the liquid-solid interface,the interaction mechanism among thermal-solute-convection transport as well as their coupling effects on the dendrite growth dynamics were discussed.The simulation results show that the release of latent heat slows down the dendrite growth rate,and both natural and forced convection disrupt the symmetrical growth of dendrites.Their combination makes the growth of dendrites more complex,capturing important physical aspects such as recalescence,dendrite tip splitting,dendrite tilting,dendrite remelting,and solute plume in the simulation case.Based on the robustness and powerful ability of the numerical model,the formation mechanisms of these physical aspects were revealed.
      原文链接:
    • 万方数据
    • 维普

    Data-driven casting defect prediction model for sand casting based on random forest classification algorithm

    Bang GuanDong-hong WangDa ShuShou-qin Zhu...
    137-146页
    查看更多>>摘要：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%.
      原文链接:
    • 万方数据
    • 维普

    Effect of Mn content on microstructure and properties of AlCrCuFeMnx high-entropy alloy

    Ning WangKai MaQiu-da LiYu-dong Yuan...
    147-158页
    查看更多>>摘要：AlCrCuFeMnx(x=0,0.5,1,1.5,and 2)high-entropy alloys were prepared using the vacuum arc melting technology.The microstructure and mechanical properties of AlCrCuFeMnx were analyzed and tested by XRD,SEM,TEM,nanoindentation,and electronic universal testing.The results indicate that the AlCrCuFeMnx high-entropy alloy exhibits a dendritic structure,consisting of dendrites with a BCC structure,interdendrite regions with an FCC structure,and precipitates with an ordered BCC structure that form within the dendrite.Manganese(Mn)has a strong affinity for dendritic,interdendritic,and precipitate structures,allowing it to easily enter these areas.With an increase in Mn content,the size of the precipitated nanoparticles in the dendritic region initially increases and then decreases.Similarly,the area fraction initially decreases and then increases.Additionally,the alloy's strength and wear resistance decrease,while its plasticity increases.The AlCrCuFeMn1.5 alloy boasts excellent mechanical properties,including a hardness of 360 HV and a wear rate of 2.4×10-5 mm3·N-1·mm-1.It also exhibits impressive yield strength,compressive strength,and deformation rates of 960 MPa,1,700 MPa,and 27.5%,respectively.
      原文链接:
    • 万方数据
    • 维普

    Interfacial reaction between AZ91D magnesium alloy melt and mild steel under high temperature

    Jia-hong DaiJian-yue ZhangBin JiangXiang-jun Xu...
    159-167页
    查看更多>>摘要：The metallurgical quality control of magnesium(Mg)and Mg alloys in melting process is required to ensure a satisfied mechanical and corrosion performance,while the typical used steel crucible introduces impurities and interfacial interaction during melting process.Therefore,a systematic study about impurities diffusion and interfacial interaction between molten Mg and steel is necessary.In the present study,the interfacial reaction between molten AZ91D Mg alloy and mild steel during melting process was investigated with the melting temperatures of 700 ℃,750 ℃ and 800 ℃.The results show that Al(Fe,Mn)intermetallic layer is the intermetallic primarily formed at the interfaces of AZ91D melt and mild steel.Meanwhile,Al8(Mn,Fe)5 is indexed between Al(Fe,Mn)and AZ91D.AlFe3C appears between the mild steel and Al(Fe,Mn)at 700 ℃ and 750 ℃,but absent at 800 ℃ due to the increased solubility of carbon in Mg matrix.It is found that the growth of the intermetallic layer is controlled by diffusion mechanism,and Al and Mn are the dominant diffusing species in the whole interfacial reaction process.By measuring the thickness of different layers,the growth constant was calculated.It increases from 1.89(±0.03)×10-12 m2·s-1 at 700 ℃ to 3.05(±0.05)×10-12 m2·s-1 at 750 ℃,and 5.18(±0.05)×10-12 m2·s-1 at 800 ℃.Meanwhile,the content of Fe is linearly increased in AZ91D with the increase of holding time at 700 ℃ and 750 ℃,while it shows a significantly increment after holding for 8 h at 800 ℃,indicating holding temperature is more crucial to determine the Fe content of AZ91D than holding time.
      原文链接:
    • 万方数据
    • 维普

    Microstructural characterization and mechanical properties of(TiC+TiB)/TA15 composites prepared by an in-situ synthesis method

    Zhi-yong ZhangJiao-jiao ChengJia-qi XieShi-bing Liu...
    168-174页
    查看更多>>摘要：Titanium matrix composites reinforced with ceramic particles are considered a promising engineering material due to their combination of high specific strength,low density,and high modulus.In this study,the TA15-based composites reinforced with a volume fraction of 10%to 25%(TiB+TiC)were prepared using powder metallurgy and casting technique.Microstructural characterization and phase constitution were examined using optical microscopy(OM),scanning electron microscopy(SEM),and X-ray diffraction(XRD).In addition,the microhardness,room temperature(RT)and high temperature(HT)tensile properties of the composites were evaluated.Results revealed that the reinforcements are distributed uniformly even in the composites with a high volume of TiB and TiC.However,as the volume fraction exceeds 15%,TiB and TiC particles become coarsening and exhibit rod-like and dendritic-like morphology.Microhardness increases gradually from 321.2 HV for the base alloy to a maximum of 473.3 HV as the reinforcement increases to 25vol.%.Tensile test results indicate that a reinforcement volume fraction above 20%is beneficial for enhancing tensile strength and yield strength at high temperatures,but it has an adverse effect on room temperature elongation.Conversely,if the reinforcement volume fraction is below 20%,it can improve high-temperature elongation when the temperature exceeds 600 ℃.
      原文链接:
    • 万方数据
    • 维普

    To improve robustness of mechanical properties of semi-solid cast A356 alloy using taguchi design method

    Yi-wu XuHong-yi ZhanWei TongJin-ping Li...
    175-184页
    查看更多>>摘要：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(x)-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.
      原文链接:
    • 万方数据
    • 维普

    Effect of droplet characteristics on liquid-phase distribution in spray zone of internal mixing air-mist nozzle

    Wei-li WuChang-gui ChengYang LiShi-fa Wei...
    185-196页
    查看更多>>摘要：In continuous casting production,droplet characteristics are important parameters for evaluating the nozzle atomization quality,and have a significant impact on the secondary cooling effect and the slab quality.In order to study the behavior of atomized droplets after reaching the slab surface and to optimize the spray cooling effect,the influence of droplet diameter and droplet velocity on the migration behavior of droplets in the secondary cooling zone was analyzed by FLUENT software.Results show that the droplets in the spray zone and on the slab surface are mainly concentrated in the center,thus,the liquid volume fraction in the center is higher than that of either side.As the droplet diameter increases,the region of high liquid volume fraction on the slab surface becomes wider,and the liquid phase distribution in the slab width direction becomes uneven.Although increasing the droplet velocity at the nozzle exit has little effect on droplet diffusion in the spray zone,the distribution becomes more uneven due to more liquid reaches the slab surface per unit time.A prediction formula of the maximum water flow rate on the slab surface for specific droplet characteristics was proposed based on dimensionless analysis and validated by simulated data.A nozzle spacing of 210 mm was recommended under the working conditions in this study,which ensures effective coverage of the spray water over the slab surface and enhances the distribution uniformity of water flow rate in the transverse direction.
      原文链接:
    • 万方数据
    • 维普

    Microstructure and properties of LZQT600-3 HCCDIBs for plunger pump cylinder

    Chun-jie XuYuan-ying JinDong MaZhen Zhao...
    197-204页
    查看更多>>摘要：It is important to improve the comprehensive performance of the ductile iron bars(DIBs)for the cylinder block of the extra high pressure hydraulic plunger pump and accelerate the industrial application.In this work,the LZQT600-3 DIBs with the diameter of 145 mm were prepared by the horizontal continuous casting(HCC)process,that is,LZQT600-3 HCCDIBs.The microstructure and room temperature tensile properties of different sections[left-edge(surface layer),left-1/2R(left half of the radius),and the center of the HCCDIBs]were studied.The results show that the spheroidization of LZQT600-3 HCCDIBs matrix from the left-edge,left-1/2R to the center is at nodulizing grade II and above.As the cooling rate gradually decreases from surface to the center of the HCCIBs,the number of spheroidized graphite is gradually reduced,the size is gradually increased,the shape factor is decreased,and the pearlite content and lamellate spacing are increased.Along the horizontal direction of the section,the hardness of the material is distributed symmetrically around the center of the HCCDIBs.In the vertical direction,the hardness distribution in the center of the HCCDIBs is asymmetrical due to the gravity during the solidification process.Therefore,the microstructure in the lower part of the section solidifies relatively quickly.The left-edge has the best tensile mechanical properties,and the ultimate tensile strength,yield tensile strength and elongation are 597.3 MPa,418.5 MPa and 9.6%,respectively.The tensile fracture belongs to the ductile-brittle hybrid fracture.The comprehensive performances of LZQT600-3 HCCDIBs meet the actual application requirements of ultra-high pressure hydraulic plunger pump cylinder.
      原文链接:
    • 万方数据
    • 维普