铸造技术2023，Vol.44Issue(12)：1094-1099,6.DOI:10.16410/j.issn1000-8365.2023.3222
钴含量对马氏体时效钢时效组织的影响研究
Study on the Effect of Cobalt Content on the Microstructure of Maraging Steels after Aging Treatment
摘要
Abstract
Maraging steel is widely used in aerospace applications such as aerospace structural steels and rocket engine casings,due to its ultrahigh strength and excellent comprehensive mechanical properties.The materials can be strengthened by precipitating nanoscale phases through aging treatment at moderate temperatures to achieve ultrahigh strength,high ductility and high toughness.Different cobalt contents have a great influence on the aging microstructure of maraging steels.However,the mechanism of cobalt in the microstructure of materials after aging treatment is still controversial at present,and there are fewer studies in this regard.In this paper,maraging steels with compositions ranging from 6％to 12％(mass fraction)cobalt content were designed and prepared,and the aging microstructures were tested and characterized.The results show that with increasing cobalt content,the martensite lath width of the aging microstructure decreases,the dislocation density increases,and the nano-precipitated phase in the material is gradually transformed from the Mo-rich phase to the Ni3Ti phase.关键词
马氏体时效钢/板条马氏体/纳米析出相/时效组织Key words
maraging steel/lath martensite/nano-indentation/aging microstructure分类
金属材料引用本文复制引用
王瑞安,高义民,王怡然,施庆峰,高尚君,李明刚..钴含量对马氏体时效钢时效组织的影响研究[J].铸造技术,2023,44(12):1094-1099,6.基金项目
国家重点研发计划(2021YFB3701204) （2021YFB3701204）
中国博士后科学基金面上资助项目(2021M692516) （2021M692516）
