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Study on the Optimization of Computer Simulation for the Quenching Process of Several Steels

Author: FengXiaoDan
Tutor: ZhangQian
School: Wuhan University
Course: Materials Science
Keywords: Quench Have a finite element method ANSYS Numerical Simulation Temperature field Organization field Hardness field
CLC: TG161
Type: Master's thesis
Year: 2005
Downloads: 418
Quote: 5
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Abstract


Using the finite element method , the critical cooling rate of quenching organization P.Maynier model and quenching hardness model , based on heat transfer and phase change of the basic principles of of T8 steel and 45 steel cylindrical sample P20 large plastic module the quench process the computer simulation . This paper focuses on the simulation and prediction of their three-dimensional the quenching transient temperature field , phase Organization field and hardness field . And by quenching temperature field experimental test , quenching microstructure observation , the determination of the hardness and published literature data for comparison , the simulation results were verified . The mathematical model of the quenching temperature field to consider the sample thermal properties parameters and quenching medium heat transfer coefficient of nonlinearity , including phase change latent heat and the temperature field coupling of sample preparation and use the ADPL language in ANSYS corresponding calculation program. The tests showed that the general steels , 700 ℃ , the cooling rate of the sample points mainly depends on the distance to the water-cooled end , has little to do with the chemical composition of the steel ; addition, the formation of the the quenching organization field , hardness field critical. Excel software based on this paper , ANSYS export data using the segmented curve fitting and mathematical derivation method processing . To improve simulation accuracy and save computing time , we use the model surface cell subdivision and variable time step method . The results showed good agreement with the calculated and measured values ??of the sample temperature field organization field and hardness field . The computer simulation of the actual quenching process temperature field and organizations is extremely large and complex , and there are a lot of problems Cen be resolved . This article has laid a foundation for future research in this area . With the perfection of the parameters of the thermal properties of various materials , the correct handling of the ANSYS meshing optimization and defined margin , will further improve the accuracy of the simulation .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Heat treatment > Heat treatment of steel
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