ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2010, Vol. 31 ›› Issue (5): 67-70.

• 组织和性能 • 上一篇    

620 ℃长期时效对新型铁素体耐热钢1Cr11Co3W3MoVNbNB组织和力学性能的影响

刘新权1,2,杨钢2,吴兴惠1,项金钟1,杨沐鑫2   

  1. 1. 云南大学物理科学技术学院,昆明 650091 ;
    2. 钢铁研究总院结构材料研究所,北京 100081;
  • 收稿日期:2010-05-19 出版日期:2010-10-01 发布日期:2022-11-12
  • 通讯作者: 杨钢
  • 作者简介:刘新权(1973-),男,硕士研究生,铁素体耐热钢研究.
  • 基金资助:
    国家高技术研究发展计划(863 )项目 (2009AA03Z509)

Effect of Long-Term Aging at 620 T on Structure and Mechanical Properties of a New Ferrite Heat Resistant Steel 1Cr11Co3W3MoVNbNB

Liu Xinquan1,2 , Yang Gang2 , Wu xinghui1 , Xiang Jinzhong1 , Yang Muxin2   

  1. 1. School of Physical Science and Technology, Yunnan University, Kunming 650091 ;
    2. Institute for Structural Materials, Central Iron and Steel Institute, Beijing 100081;
  • Received:2010-05-19 Published:2010-10-01 Online:2022-11-12
  • Contact: Yang Gang

摘要: 采用X射线衍射、光学显微镜、扫描电镜和透射电镜研究了620℃长期时效对1100℃油淬+720℃高温回火的新型铁素体耐热钢1Cr11Co3W3MoVNbNB(%:0.10C、11.08Cr、3.20Co、2.54W、0.52Ni、0.15Mo、0.09Nb、0.021N、0.014B)的显微组织和力学性能的影响。结果表明,620℃ 2000 h时效下,时效时间对室温及620℃力学性能影响不大,时效过程中主要有M23C6、Nb(CN)和M3B2三类析出相,板条亚结构没有明显的变化,显微组织稳定;固溶的Mo、W、V主要在时效过程中"脱溶"进入析出相,Nb、B主要在高温回火以及时效初期"脱溶"。

关键词: 铁素体耐热钢, 长期时效, 组织, 力学性能

Abstract: The effect of long-term aging at 620 ℃ on structure and mechanical properties of a new ferrite heat resistant steel 1Cr11Co3W3MoVNbNB (%: 0.10C, 11.08Cr, 3.20Co, 2.54W, 0.52Ni, 0.15Mo, 0.09Nb, 0.21N, 0.014B) oil-quenched at 1100 °C + high temperature tempered at 720 ℃. has been studied by using X-ray diffraction method, optical, scanning electron and transmission electron microscope. Results show that with aging at 620 ℃ for 2000 h, the aging time isn't obvious effect on the mechanical properties of the steel at ambient and at 620 °C ; during aging the main precipitated phases are M23C6, Nb(CN) and M3B2, and the structure of steel is stable and the lath sub-structure has not changed obviously; The elements Mo, W and V in solid solution mainly precipitate into precipitated phase in aging process and the elements Nb and B mainly precipitate in high temperature tempering and in initial period of aging.

Key words: Ferrite-Heat-Resistant Steel, Long-Term-Aging, Structure, Mechanical Mroperty