姚志浩,阮雅婷,董建新,张十庆,张麦仓,倪童伟,秦琴

• 1:北京科技大学材料科学与工程学院
• 2:美国哥伦比亚大学
• 3:重庆材料研究院

摘要(Abstract)：

对A286铁基高温合金进行固溶温度+时效两段式热处理工艺优化研究。采用固溶热处理制度为930~1020℃/4 h/WC,固溶时间为0~4 h。合金时效研究采用640~790℃/4 h/AC热处理;在时效温度730℃条件下,研究0~16 h时效时间对合金组织及性能的影响。结果表明:随着固溶温度上升和时间延长,合金晶粒尺寸有一定程度长大,但硬度逐渐下降;随着时效温度提高及时间延长,合金的硬度先升高而后降低;在固溶热处理过程中,合金随着固溶处理温度提高及时间的延长,γ'相回溶入基体;当固溶后的时效温度提高至700℃才析出γ'强化相;随着时效时间延长,析出的γ'强化相发生粗化;合金时效γ'强化相粗化过程符合Ostwald熟化长大规律,计算值与实际值相关系数大于97%;同时,确定了最佳的热处理工艺制度。

关键词(KeyWords)： 铁基A286高温合金;固溶时效处理;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51401020);; 国家留学基金(201506465008);; 北京市自然科学基金(2154051)

作者(Author): 姚志浩,阮雅婷,董建新,张十庆,张麦仓,倪童伟,秦琴

DOI: 10.13289/j.issn.1009-6264.2016.07.007

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