Effects of chromium on the microstructure and hot ductility of Nb-microalloyed steel

被引：19
|
作者：
Liu, Yang [1 ]
Sun, Yan-hui [1 ]
Wu, Hao-tian [1 ]
机构：
[1] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2021年 / 28卷 / 06期
基金：
中国国家自然科学基金;
关键词：
phase transformation; hot ductility; chromium; high-angle grain boundaries; grain boundary ferrite; IN-SITU OBSERVATION; PROEUTECTOID FERRITE; MECHANICAL-PROPERTIES; PHASE-TRANSFORMATION; TRANSVERSE CRACKING; CORROSION BEHAVIOR; RETAINED AUSTENITE; CARBON-STEEL; GRAIN-SIZE; PRECIPITATION;
D O I：
10.1007/s12613-020-2092-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
It is well-known that the surface quality of the niobium microalloy profiled billet directly affects the comprehensive mechanical properties of the H-beam. The effects of chromium on the gamma/alpha phase transformation and high-temperature mechanical properties of Nb-microalloyed steel were studied by Gleeble tensile and high-temperature in-situ observation experiments. Results indicated that the starting temperature of the gamma ->alpha phase transformation decreases with increasing Cr content. The hot ductility of Nb-microalloyed steel is improved by adding 0.12wt% Cr. Chromium atoms inhibit the diffusion of carbon atoms, which reduces the thickness of grain boundary ferrite. The number fractions of high-angle grain boundaries increase with increasing chromium content. In particular, the proportion is up to 48.7% when the Cr content is 0.12wt%. The high-angle grain boundaries hinder the crack propagation and improve the ductility of Nb-microalloyed steel.
引用
收藏
页码：1011 / 1021
页数：11
相关论文
共 50 条
  • [1] Effects of chromium on the microstructure and hot ductility of Nb-microalloyed steel
    Yang Liu
    Yan-hui Sun
    Hao-tian Wu
    [J]. International Journal of Minerals, Metallurgy and Materials, 2021, 28 : 1011 - 1021
  • [2] Effects of chromium on the microstructure and hot ductility of Nb-microalloyed steel
    Yang Liu
    Yan-hui Sun
    Hao-tian Wu
    [J]. International Journal of Minerals,Metallurgy and Materials, 2021, 28 (06) : 1011 - 1021
  • [3] Hot ductility of Low Carbon Nb-microalloyed Weathering Steel
    Zhang, Mei
    Zhao, Xue
    Zhu, Yan
    Huang, Chaobin
    Li, Qingshan
    Zhong, Yong
    Li, Lin
    [J]. ADVANCES IN MATERIALS AND MATERIALS PROCESSING IV, PTS 1 AND 2, 2014, 887-888 : 200 - +
  • [4] Effect of boron on the hot ductility of the Nb-microalloyed steel in Austenite region
    Zarandi, Faramarz
    Yue, Steve
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2006, 37A (07): : 2316 - 2320
  • [5] Effect of high temperature deformation on the hot ductility of Nb-microalloyed steel
    Zarandi, F
    Yue, S
    [J]. MICROALLOYING FOR NEW STEEL PROCESSES AND APPLICATIONS, 2005, 500-501 : 115 - 122
  • [6] Improvement of hot ductility in the Nb-microalloyed steel by high temperature deformation
    Zarandi, F
    Yue, S
    [J]. ISIJ INTERNATIONAL, 2005, 45 (05) : 686 - 693
  • [7] Effect of boron on the hot ductility of the Nb-microalloyed steel in austenite region
    Faramarz Zarandi
    Steve Yue
    [J]. Metallurgical and Materials Transactions A, 2006, 37 : 2316 - 2320
  • [8] The effect of boron on hot ductility of Nb-microalloyed steels
    Zarandi, F
    Yue, S
    [J]. ISIJ INTERNATIONAL, 2006, 46 (04) : 591 - 598
  • [9] Failure mode analysis and a mechanism for hot-ductility improvement in the Nb-microalloyed steel
    Faramarz Zarandi
    Steven Yue
    [J]. Metallurgical and Materials Transactions A, 2004, 35 : 3823 - 3832
  • [10] Failure mode analysis and a mechanism for hot-ductility improvement in the Nb-microalloyed steel
    Zarandi, F
    Yue, S
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2004, 35A (12): : 3823 - 3832
12345