Effect of Cr Content on Softening during Aging in High Cr Ferritic Heat Resistant Steel

被引：0
|
作者：
Miki, Kazuhiro [1 ]
Azuma, Tsukasa [2 ]
Murata, Yoshinori [3 ]
Koyama, Toshiyuki [3 ]
机构：
[1] Japan Steel Works Ltd, Muroran Res Lab, 4 Chatsucho, Muroran, Hokkaido 0518505, Japan
[2] Japan Steel Works Ltd, Muroran Plant, Muroran, Hokkaido, Japan
[3] Nagoya Univ, Grad Sch Engn, Dept Mat Sci & Engn, Nagoya, Aichi, Japan
来源：
TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN | 2018年 / 104卷 / 07期
关键词：
ferritic heat resistant steel; Cr; turbine rotor; martensite; aging; recovery; precipitate; CREEP DEFORMATION; Z-PHASE; MOD.9CR-1MO STEEL; PRECIPITATION;
D O I：
10.2355/tetsutohagane.TETSU-2017-102
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In order to clarify the effect of Cr content on creep strength in high Cr ferritic steels for turbine rotors, a series of experiments is carried out using the steels in the tampered state and after simple aging at 650 degrees C. In the tempered state, the Vickers hardness of 10.5 Cr steel is higher than that of 9 Cr steel, but it decreases remarkably in 10.5 Cr steel and becomes almost the same value in both steels at after aging for 6700 h. In the tempered state, 10.5 Cr steel shows large number density and small average particle diameter of the fine Laves phase compared with 9 Cr steel, and this condition continues even after aging for 1000 h. However, M23C6 carbide and the Laves phase grow with increasing aging time and their average particle sizes in 10.5 Cr steel become greater than those in 9 Cr steel after aging for over several thousand hours. In 10.5 Cr steel, the amounts of carbomtrides such as NbX, Cr2X, and VX decrease after 3000 to 6000 h due to precipitation of the Z phase, whereas in 9 Cr steel, carbomtrides are still present beyond 6000 h due to retardation of the Z phase precipitation.
引用
收藏
页码：377 / 384
页数：8
相关论文
共 50 条
  • [31] Formation and evolution of precipitates in high Cr ferritic heat-resistant steels
    Zhou, X. S.
    Liu, Y. C.
    Liu, C. X.
    Yu, L. M.
    Li, H. J.
    MATERIALS RESEARCH INNOVATIONS, 2015, 19 : S193 - S198
  • [32] Athermal martensite transformation of modified high Cr ferritic heat resistant steel undergoing different quenching temperatures
    Gao, Q. Z.
    Di, X. J.
    Liu, Y. C.
    Yu, L. M.
    Yan, Z. S.
    MATERIALS RESEARCH INNOVATIONS, 2012, 16 (03) : 198 - 203
  • [33] Effects of Trace Ce on Mechanical Properties of a Ferritic/Martensitic Heat Resistant Steel Containing High Cr and Co
    Wang K.
    Yang R.
    Cai X.
    Zheng L.
    Hu X.
    Li D.
    Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research, 2022, 36 (04): : 261 - 270
  • [34] Influence of austenitization temperature on phase transformation features of modified high Cr ferritic heat-resistant steel
    Gao, Qiuzhi
    Liu, Yongchang
    Di, Xinjie
    Yu, Liming
    Yan, Zesheng
    Qiao, Zhixia
    NUCLEAR ENGINEERING AND DESIGN, 2013, 256 : 148 - 152
  • [35] Stress-strain analysis of creep deterioration in heat affected weld zone in high Cr ferritic heat resistant steel
    Li, D
    Shinozaki, K
    Kuroki, H
    MATERIALS SCIENCE AND TECHNOLOGY, 2003, 19 (09) : 1253 - 1260
  • [36] EFFECT OF LONG-TERM HEAT EXPOSURE ON MICROSTRUCTURAL CHANGES OF HIGH CR FERRITIC HEAT-RESISTANT STEELS
    ISEDA, A
    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 1985, 71 (05): : S514 - S514
  • [37] Creep strengthening by lath boundaries in 9Cr ferritic heat-resistant steel
    Mitsuhara, Masatoshi
    Yamasaki, Shigeto
    Miake, Masaki
    Nakashima, Hideharu
    Nishida, Minoru
    Kusumoto, Junichi
    Kanaya, Akihiro
    PHILOSOPHICAL MAGAZINE LETTERS, 2016, 96 (02) : 76 - 83
  • [38] Effects of PWHT temperature on mechanical properties of high-Cr ferritic heat-resistant steel weld metals
    1600, Kobe Steel Ltd (63):
  • [39] Formation Mechanism of Type IV Failure in High Cr Ferritic Heat-Resistant Steel-Welded Joint
    Liu, Y.
    Tsukamoto, S.
    Shirane, T.
    Abe, F.
    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2013, 44A (10): : 4626 - 4633
  • [40] Formation Mechanism of Type IV Failure in High Cr Ferritic Heat-Resistant Steel-Welded Joint
    Y. Liu
    S. Tsukamoto
    T. Shirane
    F. Abe
    Metallurgical and Materials Transactions A, 2013, 44 : 4626 - 4633
12345