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Measurement of Grain Size Change of Austenitic Steel by Compression Test
Measurement of Grain Size Change of Austenitic Steel by Compression Test
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机译：通过压缩试验测量奥氏体钢的晶粒度变化
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摘要
The present invention relates to a method for measuring a change in the size of austenite grains in a steel by compression test, and it relates to a hot compression test using a compression test specimen produced by assembling a hollow cylindrical specimen and a bell-The purpose of this study is to analyze the changes of the austenitic grain size of steel according to various machining trains in a single experiment through the analysis of model equations for the machining strain and the shape of deformed specimen inside the specimen.;The present invention relates to a method for manufacturing a compression test specimen, which comprises: preparing a hollow cylindrical specimen and a solid cylindrical specimen; Performing a hot compression test using the compression test specimen; Measuring the shape change of the inside and outside by cutting the compressed specimen in the longitudinal direction as described above; A step of calculating the machining strain distribution inside the specimen using the friction coefficient as a boundary condition and the model equation about the shape of the deformed specimen by the finite element analysis with various boundary conditions; Converting the model equation analysis result into a shape change according to a specimen shape; Comparing the shape change of the compressed specimen with the shape change due to the model equation analysis results to obtain boundary conditions that coincide with each other; Measuring the size of austenite grains in a specimen having a processed strain distribution in a compression specimen obtained by the above-described boundary condition by microscopic observation The method is the point.
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