挤压变形对Mg-5.5Zn-1.7Nd-0.7Cd-0.5Zr合金组织和性能的影响

刘先兰; 刘楚明; 徐雷; 李慧中; 曾苏民

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挤压变形对Mg-5.5Zn-1.7Nd-0.7Cd-0.5Zr合金组织和性能的影响
Effects of Extrusion Process on Microstructure and Mechanical Properties of Mg-Nd-Zn-Zr-Cd Magnesium Alloy
2010年30卷第10期页码：894-896
纸质出版日期： 2010 ，
DOI：

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[1]刘先兰,刘楚明,徐雷,李慧中,曾苏民.挤压变形对Mg-5.5Zn-1.7Nd-0.7Cd-0.5Zr合金组织和性能的影响[J].特种铸造及有色合金,2010,30(10):894-896+982.

Liu Xianlan1, Liu Chuming1, Xu Lei 1, et al. Effects of Extrusion Process on Microstructure and Mechanical Properties of Mg-Nd-Zn-Zr-Cd Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2010,30(10):894-896.
[1]刘先兰,刘楚明,徐雷,李慧中,曾苏民.挤压变形对Mg-5.5Zn-1.7Nd-0.7Cd-0.5Zr合金组织和性能的影响[J].特种铸造及有色合金,2010,30(10):894-896+982. DOI：

Liu Xianlan1, Liu Chuming1, Xu Lei 1, et al. Effects of Extrusion Process on Microstructure and Mechanical Properties of Mg-Nd-Zn-Zr-Cd Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2010,30(10):894-896. DOI：

摘要

采用光学显微镜及透射电镜研究了Mg-5.5Zn-1.7Nd-0.7Cd-0.5Zr镁合金在不同挤压变形条件下的组织和性能。结果表明

在一定的挤压条件下

当挤压温度降低或挤压比增大

晶粒变细小

合金的抗拉强度和屈服强度提高;在温度为340℃

挤压比为16时

合金抗拉强度为334MPa

屈服强度为300MPa

伸长率为13%

力学性能优良

平均晶粒直径为7μm。

Abstract

Microstructure and mechanical properties of Mg-5.5Zn-1.7Nd-0.7Cd-0.5Zr magnesium alloy were investigated under different extrusion rates by optical microscope（OM）and TEM（transmission electron microscope）.It is revealed that at a defined extrusion condition

with decreasing in extrusion temperature or increasing in extrusion ratio

tensile strength and yield strength of the alloy are increasingly improved as a result of the refinement of grain size.Desirable mechanical properties of the alloy can be observed with extruding at 340℃and extrusion ratio of 16

where tensile strength

yield strength and elongation as well as average grain size reach 334MPa

300MPa and 13%

7 μm

respectively.