AZ31镁合金流变成形制品裂纹的形成原因

马廷威; 王玉红; 刘志华; 马谦; 刘巍

doi:10.15980/j.tzzz.2012.06.030

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AZ31镁合金流变成形制品裂纹的形成原因
Origination of Crack Formation in the AZ31 Magnesium Alloy Rheoforming Products
2012年32卷第6期页码：570-572
纸质出版日期： 2012 ，
DOI： 10.15980/j.tzzz.2012.06.030

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[1]马廷威,王玉红,刘志华,马谦,刘巍.AZ31镁合金流变成形制品裂纹的形成原因[J].特种铸造及有色合金,2012,32(06):570-572.

Ma TingWei1, Wang Yuhong1, Liu Zhihua2, et al. Origination of Crack Formation in the AZ31 Magnesium Alloy Rheoforming Products[J]. Special Casting & Nonferrous Alloys, 2012,32(6):570-572.
[1]马廷威,王玉红,刘志华,马谦,刘巍.AZ31镁合金流变成形制品裂纹的形成原因[J].特种铸造及有色合金,2012,32(06):570-572. DOI： 10.15980/j.tzzz.2012.06.030.

Ma TingWei1, Wang Yuhong1, Liu Zhihua2, et al. Origination of Crack Formation in the AZ31 Magnesium Alloy Rheoforming Products[J]. Special Casting & Nonferrous Alloys, 2012,32(6):570-572. DOI： 10.15980/j.tzzz.2012.06.030.

摘要

镁合金的塑性成形性能差

因此如何实现镁合金的塑性加工成形成为了一个新的技术难题。连续流变挤压成形实现了镁合金由高温液态直接形成制品的过程

减少了工序

节约了能源。但是制品的上下表面易出现裂纹

出现裂纹的原因主要是金属流动速度不同。为了减小和消除裂纹

可采用润滑剂、控制挤压速度、增大模具的定径带长度等措施。

Abstract

Magnesium alloy exhibits poor plastic performance

therefore

the plastic forming of magnesium alloys becomes a new technical challenge.Continuous rheo-extrusion forming realizes magnesium alloy from high-temperature liquid directly into finished products

reducing procedures and saving energy.However

there often appears cracks on the upper and lower surfaces of the products.Origination of crack formation was analyzed.The different liquid metal velocity is responsible for the crack formation in the alloy products.Through using lubricant agent

controlling extruding rate and enlarging fixed-radial length of the mould

the crack is eliminated.