Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第14卷    第3期    总第60期    2004年3月

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文章编号:1004-0609(2004)03-0398-07
热处理对喷射成形超高强Al-Zn-Mg-Cu系铝合金的影响
王洪斌1, 刘慧敏1, 黄进峰1, 张济山1, 张永安2, 熊柏青2

( 1. 北京科技大学 新金属材料国家重点实验室, 北京 100083;
2. 北京有色金属研究总院, 北京 100088
)

摘 要: 研究了2种不同热处理方式对喷射成形超高强度Al-Zn-Mg-Cu系铝合金的显微组织和力学性能的影响。观察了沉积态、 挤压态、 固溶及时效处理后样品的显微组织, 对经时效处理的样品进行了力学性能测试。 结果表明: 沉积态合金晶粒均匀细小; 挤压态合金存在大量的第二相颗粒,为富铜相; 固溶处理后, 合金出现了再结晶现象。 在T6条件下,采用常规470单级固溶和时效处理,其抗拉强度仅为710MPa, 延伸率为6.5%; 采用双级固溶和时效处理, 其抗拉强度超过800MPa, 延伸率达到9.3%。

 

关键字: 超高强度铝合金; 固溶处理; 时效处理

Effects of heat-treatment on microstructure and 
mechanical properties of ultra-high strength spray deposited Al-Zn-Mg-Cu aluminum alloy
WANG Hong-bin1, LIU Hui-min1, HUANG Jin-feng1, 
 ZHANG Ji-shan1,ZHANG Yong-an2, XIONG Bai-qing2

1. State Key Laboratory for Advanced Metals and Materials,
University of Science and Technology Bejing, 
Beijing 100083, China; 
2. Beijing General Research Institute for Nonferrous Metals, Beijing 100088, China

Abstract: The microstructures of as-deposited, extruded and heat treated ultra-high strength aluminum alloys(Al-Zn-Mg-Cu)were investigated. The tensile properties of the heat-treated alloys were tested. The results show that fine and homogeneous grain structure is obtained in as-deposited alloy. However, there are a large amount of Cu-rich particles as determined by energy dispersion spectroscopy (EDX) in as-extruded alloy. The recrystallization occurs in the heat-treated alloy. On the condition of T6 treatment, the ultimate tensile strength of the alloy following single solid-solution treatment is kept on no more than 700MPa with an elongation of 6.5%. However, the tensile strength of the alloy following dual solid-solution treatment is kept over 800MPa with an elongation of 9.3%.

 

Key words: ultrahigh strength aluminum alloy; solid-solution treatment; ageing treatment

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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