金属热处理 ›› 2023, Vol. 48 ›› Issue (3): 100-103.DOI: 10.13251/j.issn.0254-6051.2023.03.017

• 工艺研究 • 上一篇    下一篇

时效时间对PH13-8Mo不锈钢组织和力学性能的影响

杨凯, 朱宏伟, 于利民, 郁瑞兴   

  1. 首都航天机械有限公司, 北京 100076
  • 收稿日期:2022-09-27 修回日期:2022-12-28 出版日期:2023-03-25 发布日期:2023-04-25
  • 作者简介:杨凯(1990—),男,工程师,硕士,主要研究方向为金属材料热处理工艺,E-mail:dukejinghua@sina.com。

Effect of aging time on microstructure and mechanical properties of PH13-8Mo stainless steel

Yang Kai, Zhu Hongwei, Yu Limin, Yu Ruixing   

  1. Capital Aerospace Machinery Co., Ltd., Beijing 100076, China
  • Received:2022-09-27 Revised:2022-12-28 Online:2023-03-25 Published:2023-04-25

摘要: 将PH13-8Mo不锈钢在925 ℃固溶70 min,在-70 ℃冷处理2 h,再在535 ℃分别时效3、4、5、6 h,利用光学显微镜和力学性能测试设备,研究了时效时间对试验钢显微组织和力学性能的影响。结果表明,试验钢经535 ℃时效后有金属间化合物析出,该析出相随着时效时间延长逐渐长大;在时效4 h后试验钢具有较高的硬度和强度,并保持了足够的冲击吸收能量,具有较好的综合力学性能;随着时效时间延长,钢的硬度和强度下降,冲击吸收能量升高。

关键词: PH13-8Mo不锈钢, 时效强化, 力学性能

Abstract: PH13-8Mo stainless steel was solution treated at 925 ℃ for 70 min, cold treated at -70 ℃ for 2 h, and then aged at 535 ℃ for 3, 4, 5 and 6 h, respectively. The effect of aging time on microstructure and mechanical properties of the tested steel were studied by means of optical microscope and mechanical property tester. The results show that intermetallic compounds precipitate after aging at 535 ℃, and gradually grow with the extension of aging time. The tested steel has the highest hardness and strength after aging for 4 h, and maintains sufficient impact absorbed energy and has good comprehensive mechanical properties. With the extension of aging time, the hardness and strength of the tested steel decrease and the impact absorbed energy increases.

Key words: PH13-8Mo stainless steel, aging strengthening, mechanical property

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