Transactions of Materials and Heat Treatment

Title：Simulation analysis on hierarchical model in liquid core forging process

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ClassificationCode：TG319

year,vol(issue):pagenumber：2021,46(3):9-14

Abstract：

The hierarchical model of liquid core forging containing three regions of solid region, semi-solid region and liquid core region was established by forging simulation software Deform-2D, and when the reduction rate was 20 mm·s-1 and the relative reduction amount was 30%, the simulation results of temperature field for ingot with liquid core, the curves of equivalent stress and equivalent strain changing with the relative reduction amount and the metal flow rules in the three regions of solid region, semi-solid region and liquid core region under different realtive reductions and blank shell thicknesses were obtained. The simulation results show that under the same realtive reduction amount conditions, the greater the force in the semi-solid region is, the more sufficient the deformation is. In addition, the deformation of ingot is mainly borne by the liquid core region, which is beneficial to the removal of core defects in large forgings. The greater the thickness of blank shell is, the greater the deformation force required for ingot is.

Funds：

国家重点研发专项资助（2017YFB0701803&2016 YFB0701403）

吴永强（1985-），男，博士研究生E-mail：xuwenqiang10@126.com 通讯作者：王开坤（1968-），男，博士，教授E-mail：kkwang@mater.ustb.edu.cn

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