双级蠕变时效对含钪7050铝合金力学及耐腐蚀性能的影响

doi:10.13251/j.issn.0254-6051.2020.01.038

金属热处理 ›› 2020, Vol. 45 ›› Issue (1): 193-198.DOI: 10.13251/j.issn.0254-6051.2020.01.038

双级蠕变时效对含钪7050铝合金力学及耐腐蚀性能的影响

郑山红, 郭巧能, 刘志勇, 王明星

郑州大学物理学院, 河南郑州 450052

收稿日期:2019-06-25 出版日期:2020-01-25 发布日期:2020-04-03
通讯作者: 王明星,教授,博士,联系电话:13525568755,E-mail:wangmx@zzu.edu.cn
作者简介:郑山红(1994—),女,硕士研究生,主要从事铝合金的蠕变时效研究,联系电话:18638608189,E-mail:603537048@qq.com。
基金资助:
国家自然科学基金(11372283);河南省教育厅科学技术研究重点项目(13A140674)

Effect of two-stage creep-aging on mechanical properties and corrosion resistance of 7050 aluminum alloy containing Sc

Zheng Shanhong, Guo Qiaoneng, Liu Zhiyong, Wang Mingxing

School of Physics, Zhengzhou University, Zhengzhou Henan 450052, China

Received:2019-06-25 Online:2020-01-25 Published:2020-04-03

摘要/Abstract

摘要： 研究了双级蠕变时效对含钪7050合金力学性能和耐腐蚀性能的影响,并与单级蠕变时效和无应力双级时效的试验结果进行了比较。结果表明,与单级蠕变时效相比,双级蠕变时效可明显提高含钪7050合金的力学性能;经单级或双级蠕变时效处理的合金比无应力双级时效合金具有更好的耐蚀性,而单级蠕变时效合金的耐蚀性优于双级蠕变时效合金。此外,压应力状态下的单级或双级蠕变时效合金比拉应力状态下的单级或双级蠕变时效合金具有稍高的硬度和耐蚀性。

关键词: 双级蠕变时效, 含钪7050铝合金, 力学性能, 耐腐蚀性能

Abstract: Effect of two-stage creep-aging on mechanical properties and corrosion resistance of the 7050 Al alloy containing Sc was investigated, and compared with the test results of one-stage creep-aging and stress-free two-stage aging for the same alloy. The results show that two-stage creep-aging can obviously enhance the mechanical properties of the 7050 Al alloy containing scandium (Sc) comparing with one-stage creep-aging. The one-stage creep-aged or two-stage creep-aged alloys appear a better corrosion resistance than the stress-free aged alloy, moreover, the corrosion resistance of the one-stage creep-aged alloy is superior to that of the two-stage creep-aged alloy. Besides, the alloy one-stage or two-stage creep-aged in the state of compressive stress has a slightly higher hardness and a little better corrosion resistance than the alloy one-stage or two-stage creep-aged in the state of tensile stress.

Key words: two-stage creep-aging, 7050 aluminum alloy containing Sc, mechanical properties, corrosion resistance

中图分类号:

TG146.2

郑山红, 郭巧能, 刘志勇, 王明星. 双级蠕变时效对含钪7050铝合金力学及耐腐蚀性能的影响[J]. 金属热处理, 2020, 45(1): 193-198.

Zheng Shanhong, Guo Qiaoneng, Liu Zhiyong, Wang Mingxing. Effect of two-stage creep-aging on mechanical properties and corrosion resistance of 7050 aluminum alloy containing Sc[J]. HTM, 2020, 45(1): 193-198.

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双级蠕变时效对含钪7050铝合金力学及耐腐蚀性能的影响

Effect of two-stage creep-aging on mechanical properties and corrosion resistance of 7050 aluminum alloy containing Sc

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