Precipitation behavior in Nb-Ti microalloyed HSLA steels

被引：0
|
作者：
Hong, SG [1 ]
Kang, KB [1 ]
Park, CG [1 ]
机构：
[1] Pohang Univ Sci & Technol, Ctr Adv Aerosp Mat, Dept Mat Sci & Engn, Pohang 790784, South Korea
来源：
MICROSTRUCTURE MODELING AND PREDICTION DURING THERMOMECHANICAL PROCESSING | 2001年
关键词：
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The precipitation behavior of NbC carbides has been investigated in both Nb steel and Nb-Ti steel. Precipitation-Time-Temperature (PTT) diagrams were obtained by measuring softening ratios at high temperatures from two-stage interrupted compression tests. It was found that both precipitation start time (P-s) and finish time (P-f) were delayed in the Nb-Ti steel compared to those of the Nb steel. After a reheating treatment, all the precipitates were dissolved in the Nb steel, but, in the Nb-Ti steel, undissolved (Ti,Nb)(C,N) carbonitrides were observed. In addition, after the first prestrain of 0.3 at test temperatures, (Nb,Ti)C carbides strarted to precipitate preferentially at the undissolved (Ti,Nb)(C,N) carbonitrides. The delayed matrix precipitation of NbC carbides observed in the Nb-Ti steel seemed to be the cause of insufficient amounts of soluble Nb in austenite. That is, in the Nb-Ti steel, a significant fraction of Nb was lost by both the undissolved (Ti,Nb)(C,N) carbonitrides and the consequent heterogeneous nucleation of (Nb,Ti)C carbides. Therefore, it is suggested that the lowered supersaturation of Nb can result in the delay of precipitation of strain-induced NbC carbides formed in the matrix of Nb-Ti steel.
引用
收藏
页码：115 / 124
页数：10
相关论文
共 50 条
  • [1] Strain-induced precipitation of NbC in Nb and Nb-Ti microalloyed HSLA steels
    Hong, SG
    Kang, KB
    Park, CG
    [J]. SCRIPTA MATERIALIA, 2002, 46 (02) : 163 - 168
  • [2] Recrystallization and Precipitation Behavior during the Hot Deformation of Nb-Ti Microalloyed Steels
    XU You rong
    [J]. Advances in Manufacturing, 2000, (01) : 81 - 86
  • [3] Effects of Coiling Temperature on Microstructure and Precipitation Behavior in Nb-Ti Microalloyed Steels
    Xu, Lixiong
    Wu, Huibin
    Tang, Qibo
    [J]. ISIJ INTERNATIONAL, 2018, 58 (06) : 1086 - 1093
  • [4] Recrystallization and precipitation behavior during the hot deformation of Nb-Ti microalloyed steels
    Xu, You-rong
    Wang, Zhi-yong
    [J]. Journal of Shanghai University, 1999, 4 (01): : 81 - 86
  • [5] Computer simulation of carbonitride precipitation during deformation in Nb-Ti microalloyed steels
    Y. Zeng
    W. Wang
    [J]. Journal of Materials Science, 2008, 43 : 874 - 882
  • [6] Computer simulation of carbonitride precipitation during deformation in Nb-Ti microalloyed steels
    Zeng, Y.
    Wang, W.
    [J]. JOURNAL OF MATERIALS SCIENCE, 2008, 43 (03) : 874 - 882
  • [7] Effects of cooling rate and isothermal holding on the precipitation behavior during solidification of Nb-Ti bearing HSLA steels
    Jun, HJ
    Kang, KB
    Park, CG
    [J]. PROCEEDINGS OF THE THIRTEENTH (2003) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL 4, 2003, : 83 - 89
  • [8] Analysis of precipitates and precipitation behavior in Nb-Ti bearing steels
    Takayama, T
    Hinotani, S
    Ishikuro, M
    Kurosawa, F
    Yasuhara, H
    Gennai, N
    Chino, A
    Kutsumi, H
    Giga, Y
    Sukenobu, Y
    Uchiyama, M
    Ishii, M
    [J]. TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 1996, 82 (02): : 147 - 152
  • [9] Dynamic Recrystallization Behaviour of Nb-Ti Microalloyed Steels
    MA Liqiang1
    2.State Key Laboratory of Rolling and Automation
    3.Institute of Research and Development
    [J]. Journal of Wuhan University of Technology(Materials Science), 2008, (04) : 551 - 557
  • [10] Dynamic recrystallization behaviour of Nb-Ti microalloyed steels
    Ma Liqiang
    Liu Zhenyn
    Jiao Sihai
    Yuan Xiangqian
    Wu Di
    [J]. JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION, 2008, 23 (04): : 551 - 557
12345