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Method for predicting pearlitic steel microstructure based on thermodynamics and dynamics

A technology of pearlitic steel and microstructure, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficult to cover parameter range, time-consuming and labor-intensive

Active Publication Date: 2019-11-19
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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  • Method for predicting pearlitic steel microstructure based on thermodynamics and dynamics
  • Method for predicting pearlitic steel microstructure based on thermodynamics and dynamics
  • Method for predicting pearlitic steel microstructure based on thermodynamics and dynamics

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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 a pearlitic steel microstructure based on thermodynamics and dynamics, and belongs to the field of pearlitic steel microstructure calculation. Accordingto the method, a quasi-equilibrium phase diagram of pearlitic steel is calculated through thermodynamics, and eutectoid point components, eutectoid point temperature, proeutectoid phase types and forming temperature are extracted. Then, parameters such as pearlite steel components, cooling speed, proeutectoid phase forming temperature, eutectoid point temperature and model size are used as input for dynamic calculation, and a proeutectoid phase interface position and pearlite lamellar spacing curve is obtained and then converted into proeutectoid phase content and pearlite lamellar spacing. According to the thermodynamics, dynamics and data extraction method, microscopic structure characteristic parameters under the conditions of specified pearlitic steel components and cooling speed can be predicted, so that microscopic structure prediction of the pearlitic steel is realized, and complicated and time-consuming experimental processes are avoided or reduced.

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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IPC IPC(8): G06F17/50
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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