挤压工艺参数对Mg-6Al合金显微组织的影响

解东栋; 王丽萍; 冯义成; 张靖; 郭二军; 姜文勇

doi:10.15980/j.tzzz.2017.02.022

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挤压工艺参数对Mg-6Al合金显微组织的影响
Effects of Different Extrusion Processing Parameters on Microstructure of the Mg-6Al Alloy
2017年37卷第2期页码：194-197
纸质出版日期： 2017 ，
DOI： 10.15980/j.tzzz.2017.02.022

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[1]解东栋,王丽萍,冯义成,张靖,郭二军,姜文勇.挤压工艺参数对Mg-6Al合金显微组织的影响[J].特种铸造及有色合金,2017,37(02):194-197.

Xie Dongdong, Wang Liping, Feng Yicheng, et al. Effects of Different Extrusion Processing Parameters on Microstructure of the Mg-6Al Alloy[J]. Special Casting & Nonferrous Alloys, 2017,37(2):194-197.
[1]解东栋,王丽萍,冯义成,张靖,郭二军,姜文勇.挤压工艺参数对Mg-6Al合金显微组织的影响[J].特种铸造及有色合金,2017,37(02):194-197. DOI： 10.15980/j.tzzz.2017.02.022.

Xie Dongdong, Wang Liping, Feng Yicheng, et al. Effects of Different Extrusion Processing Parameters on Microstructure of the Mg-6Al Alloy[J]. Special Casting & Nonferrous Alloys, 2017,37(2):194-197. DOI： 10.15980/j.tzzz.2017.02.022.

摘要

以Mg-6Al合金为研究对象

采用小型挤压模具及电子万能试验机对其进行热挤压

研究了挤压工艺参数对Mg-6Al合金显微组织和挤压力的影响。结果表明

均匀化态Mg-6Al合金经不同条件热挤压后发生了不完全动态再结晶

部分原始组织保留下来

且再结晶晶粒多数在原始晶界和孪晶处形核。随着挤压温度升高

挤压过程中的挤压力峰值及稳态挤压力均降低。随着挤压速度增大

挤压力峰值与稳态挤压力之间的差值增大。此外

增大挤压比

挤压力峰值及稳态挤压力随之增大。

Abstract

Effects of different extrusion processing parameters on microstructure and extrusion force of the Mg-6Al alloy were investigated by using a small extrusion die and electronic universal testing machine.The results indicate that

incomplete dynamic recrystallization can be obserevd in homogenized Mg-6Al alloy during extrusion under different conditions

and a part of the original microstructure is remained.Most of the recrystallized grains are nucleated at the boundaries of original grains and twins.With extrusion temperature increase

both the maximum value of extrusion force and the steady extrusion force are reduced.With the extrusion rate increase

difference between the maximum value of extrusion force and the steady extrusion force is increased.In addition

with the ratio of extrusion increase

the maximum value of extrusion force and the steady extrusion force is increased.