检索结果-南通市图书馆

Journal of Iron and Steel Research(International) 2023年第6期30卷 1234-1243页

作者： Dan-qing Jiang Shu-jian Sun Han Wu Yang-jian Xu Fu-hai Zhu Zhen-qiang Zhang Jiang Wang Zhong-ming Ren School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

With establishment of thermal and numerical simulation models,the influence of reduction amount on solidification structure,segregation and shrinkage porosity of continuous casting(CC)billets was investigated.The thermal–mechanical coupled simulation results indicated that with an increase in reduction amount,the temperature in the central area decreases,and the reduction efficiency firstly increases and then decreases,reaching the maximum value at reduction amount of 6 mm.Metallographic analysis showed that increasing the reduction amount is beneficial for the refinement of central solidification structure.Moreover,the internal cracks are more likely to appear at higher reduction efficiency.The X-ray computerized tomography results revealed that a higher reduction amount can significantly reduce the volume fraction and equivalent diameter of the central shrinkage porosities of CC billets and increase the sphericity of them.Simultaneously,the macrosegregation of carbon along the central line is improved as the reduction amount increases;while the reduction amount exceeds 8 mm,the segregation degree will not change any more.

关键词： Mechanical reduction Solidification structure Porosity thermal simulation Continuous casting billet

thermal simulation and analysis of the STF cryomodule

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2009年第3期33卷 236-239页

作者：徐庆金 Ohuchi Norihito Kiyosumi Tsuchiya Tsai Ming-Hsun 宗占国翟纪元高杰 Institute of High Energy Physics Chinese Academy of Sciences High Energy Accelerator Research Organization Synchrotron Radiation Research Center Technical Institute of Physics and Chemistry Chinese Academy of Sciences

STF is a superconducting RF test facility constructed at the high energy accelerator research Organization of Japan （KEK）, as a main part of a R＆D project for the proposed International Linear Collider （ILC） in Asia. thermal study of the STF 1.3 GHz 9-cell cavity cryomodule was carried out within a collaboration between China and Japan. Static and dynamic thermal behaviors of the STF cryomodule were simulated and analyzed with the FEM method, and some simulation results were compared with the available experimental data. This paper presents the details.

关键词： STF cryomodule thermal simulation ILC

Differences and identification on multi-time hydrocarbon generation of carboniferous-permian coaly source rocks in the Huanghua Depression,Bohai Bay Basin

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第2期21卷 765-776页

作者： Jin-Jun Xu Xian-Gang Cheng Shu-Nan Peng Jun-Cai Jiang Qi-Long Wu Da Lou Fu-Qi Cheng La-Mei Lin National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580ShandongChina PetroChina Dagang Oilfield Company Tianjin300280China

Coal is a solid combustible mineral,and coal-bearing strata have important hydrocarbon generation potential and contribute to more than 12%of the global hydrocarbon resources.However,the deposition and hydrocarbon evolution process of ancient coal-bearing strata is characterized by multiple geological times,leading to obvious distinctions in their hydrocarbon generation potential,geological processes,and production,which affect the evaluation and exploration of hydrocarbon resources derived from coaly source rocks worldwide.This study aimed to identify the differences on oil-generated parent macerals and the production of oil generated from different coaly source rocks and through different oil generation processes.Integrating with the analysis of previous tectonic burial history and hydrocarbon generation history,high-temperature and high-pressure thermal simulation experiments,organic geochemistry,and organic petrology were performed on the Carboniferous-Permian(C-P)coaly source rocks in the Huanghua Depression,Bohai Bay Basin.The oil-generated parent macerals of coal's secondary oil generation process(SOGP)were mainly hydrogen-rich collotelinite,collodetrinite,sporinite,and cutinite,while the oil-generated parent macerals of tertiary oil generation process(TOGP)were the remaining small amount of hydrogen-rich collotelinite,sporinite,and cutinite,as well as dispersed soluble organic matter and unexhausted residual hydrocarbons.Compared with coal,the oil-generated parent macerals of coaly shale SOGP were mostly sporinite and cutinite.And part of hydrogen-poor vitrinite,lacking hydrocarbon-rich macerals,and macerals of the TOGP,in addition to some remaining cutinite and a small amount of crude oil and bitumen from SOGP contributed to the oil yield.The results indicated that the changes in oil yield had a good junction between SOGP and TOGP,both coal and coaly shale had higher SOGP aborted oil yield than TOGP starting yield,and coaly shale TOGP peak oil yield was lower than SOGP peak oil yield.There were significa

关键词： thermal simulation Multi-time oil generation processes Coaly source rock Carboniferous-permian Huanghua Depression

Effect of t_(8/5) on the microstructure and properties of the HAZ of ASME SA213-T92 steel by thermal simulation

在线全文

学校读者我要写书评

暂无评论

China Welding 2007年第3期16卷 36-40页

作者：吴军邹增大王新洪 School of Material Science and Engineering Shandong University

The relationship between the t8/5 and micro-hardness, impact toughness in the heat affected zone （HAZ） of ASME SA213-792 at peak temperature of 1 350 ℃ was studied by thermal simulation. The result shows that the micro-hardness of HAZ rises at the beginning and then decreases with increasing of t8/5 , whereas the impact toughness presents reverse trend. The distribution of precipitates in substrate has great influence on the impact toughness of HAZ. When the t8/5 is 40 s, chain-like precipitates lower the impact toughness of HAZ seriously.

关键词： ASME SA213-T92 impact toughness micro-hardness heat-affected zone （HAZ） thermal simulation

thermal simulation for Two-Phase Liquid Cooling 3D-ICs

在线全文

学校读者我要写书评

暂无评论

Journal of Computer and Communications 2016年第15期4卷 33-45页

作者： Hong-Wen Chiou Yu-Min Lee Department of Electrical and Computer Engineering National Chiao Tung University Hsinchu Chinese Taipei Industrial Technology Research Institute Hsinchu Chinese Taipei

This work presents an algorithm for simulating more accurate temperature distribution in two-phase liquid cooling for three-dimensional integrated circuits than the state of-the-art methods by utilizing local multi-linear interpolation techniques on heat transfer coefficients between the microchannel and silicon substrate, and considering the interdependence between the thermal conductivity of silicon and temperature values. The experimental results show that the maximum and average errors are only 9.7% and 6.7% compared with the measurements, respectively.

关键词： thermal simulation Microchannel Two-Phase Liquid Cooling

nfluences of superheat and cooling intensity on macrostructure and macrosegregation of duplex stainless steel studied by thermal simulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2021年第9期28卷 1125-1132页

作者： Hong-gang Zhong Xiang-ru Chen Yan-jie Liu Zhi-qiang Wei Hai-feng Yu Qi-jie Zhai Center for Advanced Solidification Technology Shanghai UniversityShanghai200444China Shanghai Institute of Materials Genome Shanghai200444China Research Institute Baoshan Iron&Steel Co.Ltd.Shanghai200431China

The influences of superheat and cooling intensity on macrostructure and macrosegregation of one new kind duplex stainless steel(DSS)were studied.thermal simulation equipment was applied to prepare samples,which could reproduce the industrial processes of DSS manufactured by a vertical continuous slab caster.Macrostructure and macrosegregation were analyzed using the digital single lens reflex and laser-induced breakdown spectroscope(LIBSOPA-200),respectively.The percentage of both chill zone and center equiaxed zone increases with the superheat decreasing,while that of the columnar zone decreases.There is only equiaxed grain existing as the superheat is 10 and 20℃.The lower the superheat is,the coarser the gain size is.High cooling intensity in mold could remarkably decrease the chill zone length and refine the grains in chill zone and center equiaxed zone.The influences of cooling intensity on macrosegregation are greater than those of superheat.The macrosegregation of Si,Mn and Cr is slightly dependent on superheat,while that of Cu,Mo and Ni changes greatly with superheat increasing.

关键词： Continuous casting Solidification thermal simulation Duplex stainless steel Macrosegregation

Development of thermal simulation system for heavy section ductile iron solidification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Foundry 2004年第S1期1卷 25-28页

作者： Z.H.Li H.Y.Geng Y.X.Li Department of Mechanical Engineering Tsinghua UniversityBeijing 100084P.R.China

A new reliable thermal simulation system for studying solidification of heavy section ductile iron has been developed using computer feedback control and artificial intelligent methods. Results of idle test indicate that the temperature in the system responses exactly to the inputted control data and the temperature control error is less than ±0.5%. It is convenient to simulate solidification of heavy section ductile iron using this new system. Results of thermal simulation experiments show that the differences in nodularity and number of graphite nodule per unit area in the thermal simulation specimen and the actual heavy section block is less than 5% and 10%, respectively.

关键词： solidification thermal simulation heavy section ductile iron

thermal simulation and Analysis on Solar Membrane Arrays in SSPS

在线全文

学校读者我要写书评

暂无评论

Thermal Simulation and Analysis on Solar Membrane Arrays in ...

Effects of pulse magneto-oscillation on GCr15 bearing steel continuous casting billet

第37届中国控制会议

作者： Chen Yang Xinbin Hou Li Wang Qian Xuesen Laboratory of Space Technology China Academy of Space Technology

Space solar power satellite（SSPS） is an advanced spacecraft for collecting solar energy in space and transmitting it wirelessly to earth.Because of the huge external flux,the high temperature in SSPS each sub-system cannot be neglected.Based on the MR SSPS concepts,this study investigated the thermal simulation and analysis on solar membrane arrays.thermal simulation including theory,model,property and external heat flux are all proposed.Furthermore,thermal analysis results of different load cases such as degenerate surface,different external heat flux,different array ratio and transient case are all discussed.At last,all thermal analysis results have been compared.It can be concluded from the simulation results that almost all membrane areas are located in the maximum temperature field.The temperature gradients cannot be neglected in the connection position between membrane and truss.The influence of degenerate surface on temperature distribution is most obvious than others.

关键词： thermal simulation thermal analysis solar membrane arrays SSPS load case

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2022年第1期29卷 144-150页

作者： Yan-jie Liu Guo-dong Xu Ying-chun Wang Hong-gang Zhong Li-juan Li Biao Wang Qi-jie Zhai Materials Genome Institute Shanghai UniversityShanghai 200444China Center for Advanced Solidification Technology Shanghai UniversityShanghai 200444China Research Institute China Baowu Steel Group CorporationShanghai 200431China Steel Plant China Baowu Steel Group CorporationShanghai 200431China

Pulse magneto-oscillation(PMO)added during solidification could affect the solidification structure and macrosegregation.A modified thermal simulation equipment was applied to prepare GCr15 bearing steel continuous casting billets with different PMO peak currents.Then,metallographic analysis,component analysis and numerical simulation were adopted to study the influence of PMO peak current and its mechanism.The sample with 150 K_(I)A PMO peak current treatment has little difference with the samples without PMO treatment on solidification structure and macrosegregation.As the peak currents are 250 and 350 K_(I)A,the columnar zone increases and macrosegregation aggravated.When 450 K_(I)A peak current is selected,the equiaxed grain ratio is enlarged,and the dendritic grains are refined,and the macrosegregation of C,Cr,Si and Mn is decreased significantly.By analyzing,different convections induced by PMO with various peak currents are the key factor to change the solidification structure and macrosegregation.

关键词： Bearing steel Numerical simulation thermal simulation Pulse magneto-oscillation

Study on thermal simulation Technology of Liquid-cooled Power Battery Pack Based on Coupling of Equivalent Circuit and Heat Flow

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study on Thermal Simulation Technology of Liquid-cooled Powe...