轧制过程中非金属夹杂物变形的三维有限元模拟

doi:10.3901/JME.2025.18.161

摘要/Abstract

摘要： 利用Abaqus有限元软件建立了钢中非金属夹杂物轧制变形的三维有限元模型，模拟了夹杂物种类、轧板中夹杂物所在位置和夹杂物方向对轧板中夹杂物变形及应力的影响。以长径比来表征钢中夹杂物的变形能力，四种夹杂物的变形能力从高到低分别为：MnS>Al₂O₃-MnS>Al₂O₃>TiN。Al₂O₃-MnS复合夹杂物中Al₂O₃外侧较软MnS相的存在，使得夹杂物周围钢基体中的等效塑性应变值更小，减小了钢基体失效的概率，因此可以在冶炼中对夹杂物改性处理，实现在硬质夹杂物外覆盖一层软质夹杂物，降低夹杂物对钢性能的危害。当夹杂物在轧板中心位置时，Al₂O₃-MnS复合夹杂物中的MnS相的残余应力平均值最小，为121.373 MPa。当夹杂物在轧板厚度1/4处时，夹杂物变形最明显，MnS相的残余应力平均值最大，为126.853 MPa。轧制变形前椭球体MnS夹杂物长轴与轧制方向夹角越大，轧制过程中发生旋转的角度也越大，轧制变形后的长径比从4.15逐渐降低至1.12。通过轧制过程中非金属夹杂物变形的三维有限元模拟，为炼钢过程中夹杂物的成分和尺寸控制以及制定轧制参数提供理论依据。

关键词: 夹杂物, 轧制, 有限元模拟, Abaqus, 应力

Abstract: A three-dimensional finite element model of the rolling deformation of non-metallic inclusions in steel is established using Abaqus finite element software. The effect of inclusion type, the location of inclusions within the rolled plate, and the orientation of inclusions on the deformation and stress of the inclusions in the rolled plate is investigated. The deformation capability of inclusions in steel is characterized by the aspect ratio. The deformation capabilities of the four types of inclusions, from highest to lowest, are as follows: MnS>Al₂O₃-MnS>Al₂O₃>TiN. In Al₂O₃-MnS composite inclusions, the presence of the softer MnS phase on the outside of the Al₂O₃ reduced the equivalent plastic strain values in the steel matrix surrounding the inclusion decreasing the probability of failure in the steel matrix. Therefore, during the smelting process, inclusions can be modified by coating a layer of soft inclusions around hard inclusions to reduce the harmful impact of inclusions on the performance of the steel. When the inclusion is located at the center of the rolled plate, the residual stress in the MnS phase of the Al₂O₃-MnS composite inclusion reached its minimum average value of 121.373 MPa. When the inclusion is located at 1/4 of the thickness of the rolled plate, the inclusions underwent the most significant deformation, and the average residual stress in the MnS phase reached its maximum value of 126.853 MPa. Before rolling deformation, the larger the angle between the major axis of the ellipsoidal MnS inclusions and the rolling direction, the greater the rotation angle during the rolling process. After the rolling deformation, the length-to-diameter ratio gradually decreased from 4.15 to 1.12. The three-dimensional finite element simulation of the deformation of non-metallic inclusions during the rolling process provides a theoretical basis for controlling the composition and size of inclusions in steelmaking, as well as for determining rolling parameters.

Key words: inclusions, rolling, finite element simulation, Abaqus, stress

中图分类号:

TG335

王佳力, 李实, 何弘博, 王亚栋, 张立峰. 轧制过程中非金属夹杂物变形的三维有限元模拟[J]. 机械工程学报, 2025, 61(18): 161-169,180.

WANG Jiali, LI Shi, HE Hongbo, WANG Yadong, ZHANG Lifeng. Three-dimensional Finite Element Simulation of Deformation of Non-metallic Inclusions during Rolling Process[J]. Journal of Mechanical Engineering, 2025, 61(18): 161-169,180.

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