КОМПЬЮТЕРНОЕ МОДЕЛИРОВАНИЕ НАПРЯЖЕНИЙ НА ФАЗОВЫХ ГРАНИЦАХ В ВЫСОКОПРОЧНОМ ЧУГУНЕ ПРИ ГОРЯЧЕМ ВЫДАВЛИВАНИИ

A. Pokrovsky, V. Kovtun, Т. V. Ryabchenko, I. Khrol
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Abstract

The computer modeling of the strain distribution in the structure of ductile iron with ferrite-pearlite matrix and inclusions of spherical graphite dependence on increasing degree of deformation during direct hot extrusion was researched. Using a software system of finite-element analysis ANSYS the numerical values of the strains at the phase boundaries: ferrite-perlite, graphiteferrite and also inside the graphite inclusions were defined. The analysis of the strain distribution in the investigated structures was performed and local zones of increased strains were discovered. The results of modeling are compared with metallographic analysis and fracture patterns. The obtained results could be used in the prediction of fracture zones in the cast iron products.
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热挤压时计算机模拟高强度铸铁相位边界电压
研究了含铁素体-珠光体基体和球形石墨夹杂的球墨铸铁在直接热挤压过程中应变分布随变形量增大的变化规律。利用有限元分析软件ANSYS确定了铁素体-珍珠岩、石墨-铁素体以及石墨夹杂体相界的应变数值。对所研究结构的应变分布进行了分析,发现了应变增加的局部区域。模拟结果与金相分析和断裂模式进行了比较。所得结果可用于铸铁制品断口区域的预测。
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