分级时效和冷热循环对2024铝合金微塑变抗力的影响|邵华,刘兆晶,刘君,李凤珍,武高辉,杨峰-《中国有色金属学报》官方网站|全网首发|论文开放获取

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第10卷第3期总第36期 2000年6月

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文章编号：1004-0609(2000)03-0330-04

分级时效和冷热循环对2024铝合金微塑变抗力的影响

邵华¹，刘兆晶¹，刘君¹，李凤珍¹，武高辉²，杨峰²

(1. 哈尔滨理工大学材料科学与工程学院，哈尔滨150080；
2. 哈尔滨工业大学，哈尔滨150001)

摘要: 用正交试验方法研究了2024铝合金的分级时效工艺，优选出了一种能获得均匀、弥散分布的沉淀强化相以改善铝合金的常规力学性能的分级时效工艺：100℃，2h+190℃, 2 h。通过将优化的分级时效工艺和冷热循环工艺相结合，可提高2024铝合金的常规力学性能和微塑变抗力。通过TEM观察探讨了分级时效对冷热循环以后2024铝合金性能的影响机制。

关键字: 分级时效；冷热循环；微屈服强度；铝合金

Influence of ageing and thermal cooling cycling treatments on microplastic deformation resistance of 2024 Al alloy

SHAO Hua¹, LIU Zhao-jing¹, LIU Jun¹, LI Feng-zhen¹, WU Gao-hui², YANG Feng²

（1. School of Materials Science and Engineering,Harbin University of Science andTechnology, Harbin 150080, P.R.China;
2. Harbin Institute of Technology, Harbin 150001, P.R.China）

Abstract:The stepstage ageing processes of 2024 Al alloy were investigated by means of orthogonal test methods. A better doublestage ageing procedure of100 ℃, 2 h+190℃, 2 h was chosen out of several methods. Following this route, the precipitates disperse homogeneously in the alloy, and the mechanical properties are obviously improved. The mechanical properties and the microyield strength of 2024 Alalloy are improved by thermalcooling cycling treatment following doublestage ageing. The influence mechanism of doublestage ageing on the properties of 2024 Alalloy after thermalcooling cycling treatment was observed by TEM.

Key words: doublestage ageing treatment; thermalcooling cycle; microyield strength; aluminum alloy

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

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