Effects of Heat Treatment on Microstructure and Mechanical Properties of Al-Cu-Mn Cast Aluminum Alloy

Li Hao; Xiao Yang; Guan Shaokang; Wang Songsen; Zhu Jungang; Xie Haitao

doi:10.15980/j.tzzz.2014.07.027

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Effects of Heat Treatment on Microstructure and Mechanical Properties of Al-Cu-Mn Cast Aluminum Alloy
Vol. 34, Issue 7, Pages: 764-766(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.07.027

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[1]李浩,肖阳,关绍康,王松森,朱君罡,解海涛.热处理对Al-Cu-Mn铸造铝合金组织和性能的影响[J].特种铸造及有色合金,2014,34(07):764-766.

Li Hao, Xiao Yang, Guan Shaokang, et al. Effects of Heat Treatment on Microstructure and Mechanical Properties of Al-Cu-Mn Cast Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 34(7):764-766(2014)
[1]李浩,肖阳,关绍康,王松森,朱君罡,解海涛.热处理对Al-Cu-Mn铸造铝合金组织和性能的影响[J].特种铸造及有色合金,2014,34(07):764-766. DOI： 10.15980/j.tzzz.2014.07.027.

Li Hao, Xiao Yang, Guan Shaokang, et al. Effects of Heat Treatment on Microstructure and Mechanical Properties of Al-Cu-Mn Cast Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 34(7):764-766(2014) DOI： 10.15980/j.tzzz.2014.07.027.

摘要

研究了固溶温度、时效时间、时效温度对Al-Cu-Mn铸造铝合金微观组织和力学性能的影响。结果表明

合金经过530℃×14 h固溶处理后

晶界残留相最少;时效温度为170℃时

合金的硬度（HBW）随时效时间延长先增大后减小

在6h时达到峰值（145）;在不同温度下时效6 h后

合金的抗拉强度、硬度（HBW）随时效温度的上升先增大后减小

均在170℃时达到峰值

为480 MPa和145

伸长率随时效温度的升高而迅速下降。

Abstract

Effects of solution temperature

aging time

aging temperature on microstructure and mechanical properties of cast Al-Cu-Mn aluminum alloy were investigated by optical microscopy

SEM（ scanning electron microscopy）

tensile testing and hardness measurement. The results show that the least residual phase in the grain boundary occurs after solution at 530 ℃ for 14 hours. The hardness of samples aged at 170 ℃ reaches the maximum value of 145 at the sixth hour

and then decreased with increasing in aging time. The tensile strength and hardness of samples with aging at different temperatures for 6 hours are increased firstly and then decreased with increasing in temperature. The tensile strength and hardness of the samples at 170 ℃ reach 480 MPa and 145（ HBW）

respectively. However

the elongation is decreased rapidly with increasing in aging temperature.