金属热处理 ›› 2022, Vol. 47 ›› Issue (8): 194-199.DOI: 10.13251/j.issn.0254-6051.2022.08.033

• 工艺研究 • 上一篇    下一篇

恢复热处理对K403镍基高温合金组织与性能的影响

吴业琼1, 雷勇2, 司艳1, 秦江1, 王轶1, 程小红1, 陈新悦1, 杨浩2   

  1. 1.成都天翔动力技术研究院, 四川 成都 610093;
    2.成都航利实业(集团)有限公司, 四川 成都 611936
  • 收稿日期:2022-03-19 修回日期:2022-06-20 出版日期:2022-08-25 发布日期:2022-09-19
  • 作者简介:吴业琼(1982—),女,高级工程师,博士,主要研究方向为高质高效裂纹清洗及高温合金组织恢复,E-mail:joneswei@126.com。

Effect of recovery heat treatment on microstructure and properties of K403 nickel-based superalloy

Wu Yeqiong1, Lei Yong2, Si Yan1, Qin Jiang1, Wang Yi1, Cheng Xiaohong1, Chen Xinyue1, Yang Hao2   

  1. 1. Chengdu Tianxiang Powerplant Technology Institute, Chengdu Sichuan 610093, China;
    2. Hangli (Group) Industrial Co., Ltd., Chengdu Sichuan 611936, China
  • Received:2022-03-19 Revised:2022-06-20 Online:2022-08-25 Published:2022-09-19

摘要: 对涡轮叶片用典型材料镍基高温合金K403进行应力时效模拟使用后的叶片,再对其进行恢复热处理。采用扫描电镜和力学测试设备对铸态试样、预先应力时效试样和恢复热处理试样的微观组织与力学性能进行了测试分析。结果表明,不同时间预先应力时效K403合金试棒经恢复热处理以后,微观组织中的γ′强化相明显细化,形貌接近立方,恢复热处理试样的高温抗拉强度和高温持久寿命都优于未经处理的合金试棒。预先应力时效时间越长,恢复热处理后合金试棒的高温持久寿命提高率越高。

关键词: K403镍基高温合金, 恢复热处理, 组织, 性能

Abstract: Nickel-based superalloy K403, a typical material for turbine blades, was stress aged to simulate blades used for a period of time, and then the previous stress aged specimens were subjected to recovery heat treatment. Microstructure and properties of the original specimen, the previous stress aged specimen and the recovery heat treated specimen were analyzed and tested by means of scanning electron microscope and mechanical testing machine, respectively. The results show that after recovery heat treatment, the strengthening phase γ′ in the microstructure is obviously refined in the K403 alloy test bar previous stress aged for different time, the morphology is close to cubic, and the high temperature tensile strength and rupture life of the recovered specimens are better than those of the untreated test bar. The longer the previous stress aging time, the higher the increase rate of high temperature rupture life of the alloy test bar after recovery heat treatment.

Key words: K403 nickel-based superalloy, recovery heat treatment, microstructure, properties

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