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第十六届全国等离子体科学技术会议暨第一届全国等离子体医学研讨会

作者：邱银杨青巍李广生蔡立君刘健 Southwestern Institute of Physics

In order to develop nuclear fusion energy,many countries are active in the study of magnetic confinement fusion in ***-2M Tokamak is a conventional and medium-sized Tokamak which adopt the demountable toroidal field coils(TFC) structure in order to assemble the vacuum vessel chamber and poloidal field coil(PFC) integrally. The TFC is designed for a maximum field of 3T at R = 1.78 m and consists of 20 bundles (140 turns) of copper alloy plate with a maximum current of 195 *** normal operation,the current is 140kA and the field is 2.2T. Base on the electromagnetic,thermal and structure analysis,we have to make large size(55mm1800mm5600mm) copper alloy plate with high fatigue stress and high *** nominal chemical composition of the copper alloy plate:copper and silver > 99.75%;silver.0.09-0.15%;phosphorus:0.001-0.01%;magnesium:0.03- 0.14%.We consider two trial-manufacturing method:one is the semi-continuous casting-hot roll-cold roll-annealing process,another is vacuum melting- vacuum casting-hot forging-cold forging-heat *** coupled plasma emission spectrometer,Rockwell hardness tester,electronic tensile testing machine,PQS - 60 type pure bending fatigue testing machine and tension-compression fatigue testing machine were used to chemical analysis,conductivity analysis and mechanical properties analysis. After several trail-manufacturing,the first method result is:electrical conductivity≥80%IACS;hardness≥85HRF;tensile strength≥305MPa;elongation≥20%;bending fatigue strength≥150MPa(10 circles);tension-compression fatigue strength≥200Mpa (10 circles).The second method result is:electrical conductivity≥86%IACS;hardness≥90HRF;tensile strength≥320MPa;elongation > 10%;grain size 0.04～0.06 mm. Because the cold working rate of the cold forging is more than the cold roll,the tensile strength is higher.

关键词： Tokamak toroidal feild coil high fatigue stress high conductivity copper plate

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Effect of cooling structure on thermal behavior of copper plates of slab continuous casting mold

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Journal of Central South University 2013年第2期20卷 318-325页

作者：孟祥宁朱苗勇 School of Materials and Metallurgy Northeastern University

A three-dimensional finite-element model of slab continuous casting mold was conducted to clarify the effect of cooling structure on thermal behavior of copper plates. The results show that temperature distribution of hot surface is mainly governed by cooling structure and heat-transfer conditions. For hot surface centricity, maximum surface temperature promotions are 30 ℃and 15 ℃ with thickness increments of copper plates of 5 mm and nickel layers of 1 ram, respectively. The surface temperature without nickel layers is depressed by 10 ℃ when the depth increment of water slots is 2 mm and that with nickel layers adjacent to and away from mold outlet is depressed by 7℃ and 5 ℃, respectively. The specific trend of temperature distribution of transverse sections of copper plates is nearly free of cooling structure, but temperature is changed and its law is similar to the corresponding surface temperature.

关键词： slab continuous casting mold copper plate cooling structure thermal behavior finite element analysis

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