Effects of Extrusion Ratio on Microstructure and Properties of Hot Extruded AZ80 Magnesium Alloy

Liang Haicheng1; Feng Lijun2; Cui Jianzhong1; Zhang Zhiqiang1; Zhao Genfa3

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Effects of Extrusion Ratio on Microstructure and Properties of Hot Extruded AZ80 Magnesium Alloy
Vol. 32, Issue 1, Pages: 20-22(2012)
Published： 2012 ，
DOI：

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[1]梁海成,冯立军,崔建忠,张志强,赵根发.挤压比对热挤压AZ80镁合金管材组织和性能的影响[J].特种铸造及有色合金,2012,32(01):20-22.

Liang Haicheng1, Feng Lijun2, Cui Jianzhong1, et al. Effects of Extrusion Ratio on Microstructure and Properties of Hot Extruded AZ80 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 32(1):20-22(2012)
[1]梁海成,冯立军,崔建忠,张志强,赵根发.挤压比对热挤压AZ80镁合金管材组织和性能的影响[J].特种铸造及有色合金,2012,32(01):20-22. DOI：

Liang Haicheng1, Feng Lijun2, Cui Jianzhong1, et al. Effects of Extrusion Ratio on Microstructure and Properties of Hot Extruded AZ80 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 32(1):20-22(2012) DOI：

摘要

选用不同的挤压比对变形镁合金AZ80进行管材热挤压工艺试验研究

对挤压前后材料组织与力学性能的变化进行分析。结果表明

热挤压可以显著细化AZ80镁合金的晶粒

而且随着挤压比的增加

晶粒变得更加细小;增大挤压比也可以提高AZ80镁合金的抗拉强度和屈服强度。结果表明

挤压比为18.2

坯料温度为390℃

模具预热温度为360℃

凹模的半模角为60°～70°

可得到均匀的合金组织和良好的力学性能。

Abstract

Effects of different squeezing ratios on microstructure and properties of AZ80 magnesium alloy in hot extruded process were investigated.The results reveal that the microstructure of the AZ80 alloy is effectively refined after hot-extrusion.The grains are refined increasingly and the tensile strength and yield strength of the AZ80 alloy extruded are obviously improved with increasing in extrusion ratio.The tubes with desirable microstructure and mechanical properties can be obtained by controlling the temperature of billet at 390 ℃ and mold preheating temperature at 360 ℃

half-die angle at 60°

0° as well as extrusion ratio of 18.2.