An analysis method for the corresponding phase change in the heat treatment process of metal materials
A metal material and processing technology, applied in the field of metal materials with phase transition, can solve the problems of complex quantitative measurement and analysis technology and high test cost, and achieve the effect of fast speed, less consumables, and low preparation requirements
Inactive Publication Date: 2018-05-22
SHANGHAI INST OF TECH
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[0004] The purpose of the present invention is to provide an analysis method for the corresponding phase change in the heat treatment process of metal materials in order to solve the technical problems of complex quantitative measurement and analysis technology and high test costs in the phase change analysis process of metal materials
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Embodiment 1
[0028] A method for analyzing corresponding phase changes in the heat treatment process of metal materials, specifically comprising the following steps:
[0029] (1), first establish the relationship between the temperature and density of the metal material to be tested
[0030] First measure the corresponding densities of the three metal materials to be tested under different heat treatment states, and then use the processing temperature as the abscissa and the density as the ordinate to establish the relationship between the temperature and density of the metal material to be tested, that is, the working curve;
[0031] The material to be analyzed and tested is an aluminum alloy with a grade of 2XXX. The size of the three metal samples is about 20´20´10mm, and the weight is greater than 10 g . After solid solution treatment first, this measurement is the measurement of its aging effect. The three sample numbers are G 1 , G 2 and G 3 ; where G 1 aging at 100°C; G 2 It ...
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Abstract
The invention discloses an analysis method for corresponding phase changes in the heat treatment process of metal materials. According to the change of the density of the metal material to be tested, the method can quantitatively analyze and judge the phase change of the metal material to be tested. First measure the density corresponding to different heat treatment states of the metal material to be tested, then take the heat treatment temperature as the abscissa, and the density of the metal material to be tested as the ordinate, to establish the relationship between the heat treatment temperature of the metal material to be tested and the density of the metal material to be tested Formula, that is, the working curve; through the obtained working curve, according to the position of the density value of the metal material to be tested in the working curve, or by comparing the densities under different heat treatment states, it can be quantitatively judged that the metal material to be tested is in a certain position. A phase condition corresponding to a heat treatment state. The analysis method has the advantages of simple sample preparation, convenient operation, high accuracy of experimental data, high repeatability and high reliability.
Description
technical field [0001] The present invention relates to an analysis method for corresponding phase changes in the heat treatment process of metal materials, these metal materials include iron and steel materials, aluminum alloys, magnesium alloys, titanium alloys, etc., and the analysis method is applicable to all metal materials with phase transitions . Background technique [0002] Metal materials will change their material structure state during processing. For example, some steel and some aluminum and magnesium alloy materials can change their phase structure and phase composition through heat treatment, so as to achieve the purpose of changing and improving material properties. Changes in the microscopic state of metal materials will generally cause changes in their size and other properties, such as the first-order phase transition of solid materials, which are accompanied by changes in their volume and size. Because such changes are generally small, and the testing a...
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IPC IPC(8): G01N9/36
Inventor 刘克家薛银陈琨陈慧芬王浩付伟英
Owner SHANGHAI INST OF TECH