Method for obtaining quenching process heat transfer coefficient of aluminum alloy component under three-dimensional heat transfer condition based on finite element method

Abstract

The invention discloses a method for obtaining the quenching process heat transfer coefficient of an aluminum alloy component under the three-dimensional heat transfer condition based on a finite element method, and relates to the technology of obtaining the heat transfer coefficient under the three-dimensional heat transfer condition. The method aims to solve the problem that the heat transfer coefficient obtained under the one-dimensional heat transfer condition does not agree with the heat transfer coefficient of the actual aluminum alloy component under the three-dimensional heat transfer condition, and thus the obtained heat transfer coefficient is inaccurate. The method includes the steps that a three-dimensional heat conduction differential equation under a rectangular coordinate system is established; on the basis of the finite element computing method, the aluminum alloy component is subjected to finite element mesh generation, and the temperature field corresponding to a certain moment of time is calculated; whether the test temperature and the calculating temperature of a test point meet a convergence condition or not is judged; if yes, the method is ended; if not, a novel heat transfer coefficient is obtained through optimization by means of a genetic algorithm; a novel temperature field is calculated according to the novel heat exchange coefficient, and whether the test temperatures and the calculating temperatures of N test points meet the convergence condition or not is continuously judged. The method can be used for obtaining the heat transfer coefficient under the three-dimensional heat transfer condition.

Description

technical field [0001] The invention relates to the technology for obtaining the heat transfer coefficient under the three-dimensional heat transfer condition, and belongs to the field of heat treatment technology. Background technique [0002] In order to obtain excellent mechanical properties, quenching is one of the most critical processes in various heat treatment procedures of aluminum alloy components. With the development of computer technology, using computer to predict the properties of materials has become more and more indispensable means, and it is an important way of scientific research and technology development and research. The calculation of the temperature field in the quenching process of aluminum alloy components has an important influence on the calculation of material properties, and the calculation accuracy of the temperature field of aluminum alloy components determines the prediction accuracy of material properties. The heat transfer coefficient is ...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the heat transfer coefficient of the quenching process obtained under the one-dimensional heat transfer condition does not match the three-dimensional heat transfer condition of the actual aluminum alloy component, resulting in the inaccurate heat transfer coefficient obtained, thereby providing a three-dimensional heat transfer coefficient based on the finite element method. Obtaining method of heat transfer coefficient in quenching process of aluminum alloy components under heat transfer conditions

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