Transactions of Materials and Heat Treatment

Title：Numerical study of backward extrusion process for AZ31 magnesium alloy battery cylinder

Authors： Sun Yingdi Chen Qiurong

Unit： Shanghai Institute of Micro-system and Information Technology Chinese Academic of Science

KeyWords： AZ31 magnesium alloy backward extrusion numerical simulation battery cylinder

ClassificationCode：TG379

year,vol(issue):pagenumber：2015,40(3):46-52

Abstract：

The backward extrusion process of No.1 magnesium alloy battery cylinder was simulated by Deform-3D software based on the model of AZ31 magnesium alloys. The die structure was designed and the backward extrusion process with different parameters was compared and optimized. The results show that with the same extrusion speed, the equivalent stress peak reduces continually and equivalent strain peak increases continually with the increasing extrusion temperature. When the temperature field moves to high temperature region, the damage value decreases to the minimum at 280 ℃, namely, the damage rate of the backward extrusion process for AZ31 magnesium alloys reduces to the minimum. In addition, at this temperature, the equivalent stress peak reduces continually and equivalent strain peak increases continually with the increasing extrusion speed. When the peak of temperature field moves to high temperature region, the damage value reduces to the minimum at the extrusion speed of 12 mm·s-1. The test of the backward extrusion was carried out by the optimized process. The qualified products were produced, and the microstructure of cylinder sidewall was uniform.

Funds：

嘉兴市重大科技专项镁合金板型材加工技术研究及产业化（2010AZ2001）

孙颖迪（1983-），女，博士，助理研究员

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