高压扭转IF钢压缩阶段的不均匀变形

发布时间：2018-07-17 05:33

【摘要】：观察并研究了IF钢高压扭转压缩阶段过程中的硬度及显微组织不均匀分布特征,并利用ANSYS有限元分析软件对实验结果进行模拟仿真验证。结果表明IF钢在高压扭转压缩阶段过程中的应力、应变及硬度分布是不均匀的:心部变形程度较小,硬度比较低;中间区域变形比较均匀,硬度也趋于一致;在边缘区域,形变程度很大,从而硬度比较高;对于限定型高压扭转,由于模具凹槽立壁对试样变形的阻滞作用,变形量较小从而形成形变"死区"。模拟结果与硬度及显微组织分布的实验结果极为吻合,由此说明,正是由于压缩阶段试样各部位不均匀变形导致了显微组织、硬度的不均匀分布。
[Abstract]:The uneven distribution of hardness and microstructure during high pressure torsional compression of if steel was observed and studied. The experimental results were simulated and verified by ANSYS finite element analysis software. The results show that the distribution of stress, strain and hardness of if steel during high pressure torsional compression is not uniform: the center deformation degree is smaller, the hardness is lower, the middle zone deformation is more uniform, the hardness tends to be consistent, and in the edge region, the distribution of stress, strain and hardness is not uniform. The deformation degree is very large and the hardness is relatively high. For the limited high pressure torsion, the deformation "dead zone" is formed because of the block effect of the vertical wall of the die grooves on the specimen deformation. The simulation results are in good agreement with the experimental results of hardness and microstructure distribution, which shows that the uneven distribution of microstructures and hardness is due to the uneven deformation of various parts of the specimens during compression.
【作者单位】：山东农业大学机械与电子工程学院;山东农业大学园艺科学与工程学院;韩国浦项工科大学;
【基金】：山东省现代农业产业技术体系果品产业创新团队资金(SDAIT-06-12) 山东省科技发展计划项目(2014GGX102012) 国际热核聚变实验堆(ITER)计划专项(2013GB110005)
【分类号】：TG142.1

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