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A Method for Predicting the Microstructure of Pearlitic Steel Based on Thermodynamics and Kinetics

A pearlitic steel, microstructure technology, applied in the direction of design optimization/simulation, etc., can solve the problems of time-consuming and labor-intensive, difficult to cover the parameter range, etc.

Active Publication Date: 2021-07-23
UNIV OF SCI & TECH BEIJING +1
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Problems solved by technology

[0003] It is not only time-consuming and labor-intensive to study the effect of pearlitic steel composition and cooling rate on the proeutectoid phase composition and pearlite lamellar spacing, but also difficult to cover the entire parameter range.

Method used

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  • A Method for Predicting the Microstructure of Pearlitic Steel Based on Thermodynamics and Kinetics
  • A Method for Predicting the Microstructure of Pearlitic Steel Based on Thermodynamics and Kinetics
  • A Method for Predicting the Microstructure of Pearlitic Steel Based on Thermodynamics and Kinetics

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Embodiment Construction

[0026] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0027] The invention provides a method for predicting the microstructure of pearlitic steel based on thermodynamics and kinetics.

[0028] The method includes steps as follows:

[0029] (1) Thermodynamic calculation:

[0030] Input the pearlitic steel composition into the Thermo-Calc program, use the quasi-equilibrium mode to calculate the quasi-equilibrium phase diagram of the pearlitic steel, and obtain the eutectoid composition, eutectoid temperature, and proeutectoid phase based on the quasi-equilibrium phase diagram Type and formation temperature information; eutectoid composition and eutectoid temperature are the horizontal axis composition and vertical axis temperature corresponding to the only intersection point in the quasi-equilibrium phase di...

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Abstract

The invention provides a method for predicting the microstructure of pearlitic steel based on thermodynamics and dynamics, and belongs to the field of calculating the microstructure of pearlitic steel. The method uses thermodynamics to calculate the quasi-equilibrium phase diagram of pearlitic steel and extracts eutectoid composition, eutectoid temperature, proeutectoid phase type and formation temperature. Then, parameters such as pearlitic steel composition, cooling rate, proeutectoid phase formation temperature, eutectoid point temperature, and model size are used as input for kinetic calculation, and the proeutectoid phase interface position and pearlite lamellar spacing curve are obtained, and then transformed into is the content of proeutectoid phase and the interlamellar spacing of pearlite. According to this method of thermodynamics, kinetics and data extraction, it is possible to predict the characteristic parameters of microstructure under the conditions of specified pearlitic steel composition and cooling rate, so as to realize the microstructure prediction of pearlitic steel and avoid or reduce tedious and time-consuming experiments process.

Description

technical field [0001] The invention relates to the technical field of calculating the microstructure of pearlitic steel, in particular to a method for predicting the microstructure of pearlitic steel based on thermodynamics and dynamics. Background technique [0002] Pearlitic steel has high strength, high wear resistance and toughness, and can be used in tire steel wire, bridge cables and spring components, and is widely used in national economic construction. Pearlite is a mechanical mixture of ferrite and cementite that results from the eutectoid decomposition of the parent austenite, which usually occurs during continuous cooling on the Stellm cooling line. In the pearlite microstructure, the proeutectoid phase composition and pearlite lamellar spacing are the key microstructure characteristic parameters. [0003] It is not only time-consuming and labor-intensive to study the effects of pearlitic steel composition and cooling rate on the proeutectoid phase composition ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
Inventor 张聪姜雪胡磊麻晗尹海清米振莉沈奎宋勇江卓俊王新张国飞张瑞杰苏岚
Owner UNIV OF SCI & TECH BEIJING
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