| Solution of an Inverse Problem of Heat Conduction of 45 Steel with Martensite Phase Transformation in High Pressure during Gas Quenching |
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| 作者姓名： | HemingCHENG TianchunHE |
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| 作者单位： | DepartmentofEngineeringMechanics,KummingUniversityofScienceandTechnology,Kunming650093,China |
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| 基金项目： | This work has been supported by the National Natural Science Foundation of China (10162002) and Foundation for University Key Teacher by the Ministry of Education and The Yunnan Foundation of Natural Science (1999A0023M). |
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| 摘 要： | In order to simulate thermal strains,thermal stresses,residual stresses and microstructure of the steel during gas quenching by means of the numerical method,it is necessary to obtain an accurate boundary condition of temperature field.The surface heat transfer coefficient is a key parameter.The explicit finite difference method,nonlinear estimation method and the experimental relation between temperature and time during gas quenching have been used to solve the inverse problem of heat conduction.The relationship between surface temperature and surface heat transfer coefficient of a cylinder has been given.The nonlinear surface heat transfer coefficients include the coupled effects between martensitic phase transformation and temperature.
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| 关 键 词： | 45钢 相变 热效应 高压条件 组织 相结合 |
| 收稿时间： | 2001-02-05 |
Solution of an Inverse Problem of Heat Conduction of 45 Steel with Martensite Phase Transformation in High Pressure during Gas Quenching |
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| Heming CHENG,Tianchun HE,Jianbin XIE.Solution of an Inverse Problem of Heat Conduction of 45 Steel with Martensite Phase Transformation in High Pressure during Gas Quenching[J].Journal of Materials Science & Technology,2002,18(4):372-374. |
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| Authors: | Heming CHENG Tianchun HE Jianbin XIE |
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| Affiliation: | Department of Engineering Mechanics, Kunming University of Science and Technology, Kunming 650093, China |
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| Abstract: | In order to simulate thermal strains, thermal stresses, residual stresses and microstructure of the steel during gas quenching by means of the numerical method, it is necessary to obtain an accurate boundary condition of temperature field. The surface heat transfer coefficient is a key parameter. The explicit finite difference method, nonlinear estimation method and the experimental relation between temperature and time during gas quenching have been used to solve the inverse problem of heat conduction. The relationship between surface temperature and surface heat transfer coefficient of a cylinder has been given. The nonlinear surface heat transfer coefficients include the coupled effects between martensitic phase transformation and temperature. |
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| Keywords: | 45 steel Phase transformation Heat conduction |
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