金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 45-49.DOI: 10.13251/j.issn.0254-6051.2023.11.007

• 材料研究 • 上一篇    下一篇

Ni含量对A330M超高强度钢组织性能的影响

肖凯1, 韩顺2, 许忠智2, 耿如明2, 夏慧敏1, 徐正伟1, 厉勇2, 王春旭2   

  1. 1.中国商用飞机有限责任公司 上海飞机设计研究院, 上海 200232;
    2.钢铁研究总院有限公司 特殊钢研究院, 北京 100081
  • 收稿日期:2023-08-28 修回日期:2023-10-05 出版日期:2023-11-25 发布日期:2023-12-27
  • 通讯作者: 韩 顺,高级工程师,E-mail:hanshunfa@126.com
  • 作者简介:肖 凯(1982—),男,高级工程师,主要研究方向为民机超高强度钢工程研究与应用,E-mail:xiaokai@comac.cc。
  • 基金资助:
    国家重点研发计划(2022YFB3705204)

Effect of Ni content on microstructure and properties of A330M ultra-high strength steel

Xiao Kai1, Han Shun2, Xu Zhongzhi2, Geng Ruming2, Xia Huimin1, Xu Zhengwei1, Li Yong2, Wang Chunxu2   

  1. 1. Shanghai Aircraft Design and Research Institute, Commercial Aircraft Corporation of China, Ltd., Shanghai 200232, China;
    2. Research Institute of Special Steels, Central Iron and Steel Research Institute Company Limited, Beijing 100081, China
  • Received:2023-08-28 Revised:2023-10-05 Online:2023-11-25 Published:2023-12-27

摘要: 采用扫描电镜、透射电镜和力学性能分析等试验方法,研究了1.85%、3.85%、5.00%Ni含量对A330M超高强度钢微观组织及力学性能的影响规律。结果表明,不同Ni含量的试验钢淬火+低温回火后的微观组织主要由板条马氏体、残留奥氏体及ε碳化物组成,在1.85%~5.00%的Ni含量范围内,随着Ni含量的增加,试验钢的Ms点逐渐降低,组织中的残留奥氏体含量逐渐增加;其抗拉强度和屈服强度随着Ni含量的增加不断降低,冲击吸收能量则升高显著,冲击断口韧窝比例不断增加。对3种Ni含量的A330M钢的强韧性进行比较,3.85%的Ni含量可以获得最佳的强韧性匹配,抗拉强度为2207 MPa,冲击吸收能量为34 J。

关键词: Ni含量, 超高强度钢, Ms点, 微观组织, 力学性能

Abstract: Influence of Ni content (1.85%, 3.85%, 5.00%) on microstructure and mechanical properties of A330M ultra-high strength steel was studied by means of scanning electron microscope, transmission electron microscope and mechanical properties test. The results show that the microstructure of the tested steel after quenching and tempering at low temperature is mainly composed of lath martensite, retained austenite and ε carbide. In the range of 1.85%-5.00% Ni content, the Ms point of the tested steel gradually decreases with the increase of Ni content, and the content of retained austenite in the structure gradually increases. The tensile strength and yield strength decrease with the increase of Ni content, the impact absorbed energy increases significantly, and the proportion of impact fracture dimples increases. Comparing the strength and toughness of the A330M steel with three kinds of Ni content, 3.85% Ni content can obtain the best strength and toughness matching, tensile strength is 2207 MPa, impact absorbed energy is 34 J.

Key words: Ni content, ultra-high strength steel, Ms point, microstructure, mechanical properties

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