Analysis of Ironing Process for High Strength Ti Alloy

Li Zhiyu

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Analysis of Ironing Process for High Strength Ti Alloy
Vol. 29, Issue 11, Pages: 1058-1060(2009)
Published： 2009 ，
DOI：

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[1]李智宇.高强钛合金缩径挤压成形机理分析[J].特种铸造及有色合金,2009,29(11):1058-1060+979.

Li Zhiyu. Analysis of Ironing Process for High Strength Ti Alloy. [J]. Special Casting & Nonferrous Alloys 29(11):1058-1060(2009)
[1]李智宇.高强钛合金缩径挤压成形机理分析[J].特种铸造及有色合金,2009,29(11):1058-1060+979. DOI：

Li Zhiyu. Analysis of Ironing Process for High Strength Ti Alloy. [J]. Special Casting & Nonferrous Alloys 29(11):1058-1060(2009) DOI：

摘要

采用刚塑性有限元法对高强度钛合金缩径挤压过程进行模拟

获得了成形过程中的网格变化图和标记点的金属流动速度变化图;通过对各标记点速度变化的分析

发现坯料表面金属相对于中心金属的流动速度变化是端面凹陷形成的根本原因;在此基础上探讨了凹模锥面的形状和摩擦阻力对缩径挤压的影响。

Abstract

Ironing process for high strength Ti alloy was simulated by rigid-plastic FEM（finite element method）.The grid chart and the metal flow velocity chart in marked point were presented during ironing process.Through the analysis of the velocity change of every marked point

it is concluded that formation of sunken end face is attributed to the flow velocity change of surface metal of the billets relative to center metal.Based on above analysis

effects of conical face shape of cavity mould and frictional resistance on ironing process were described.