Influence of Cooling Rate on Secondary Phase Precipitation and Proeutectoid Phase Transformation of Micro-Alloyed Steel Containing Vanadium

被引：17
作者：
Dou, Kun [1 ]
Meng, Lingtao [1 ]
Liu, Qing [1 ]
Liu, Bo [1 ]
Huang, Yunhua [2 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 10083, Peoples R China
[2] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
来源：
METALS AND MATERIALS INTERNATIONAL | 2016年 / 22卷 / 03期
关键词：
metals; solidification; phase transformation; scanning electron microscopy (SEM); cooling rate; IN-SITU OBSERVATION; AUSTENITE INTERPHASE BOUNDARY; TI MICROALLOYED STEEL; LOW-CARBON STEELS; HOT DUCTILITY; MECHANICAL-PROPERTIES; MICROSTRUCTURE; SLAB; TEMPERATURE; TITANIUM;
D O I：
10.1007/s12540-016-2676-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
During continuous casting process of low carbon micro-alloyed steel containing vanadium, the evolution of strand surface microstructure and the precipitation of secondary phase particles (mainly V(C, N)) are significantly influenced by cooling rate. In this paper, influence of cooling rate on the precipitation behavior of proeutectoid alpha-ferrite at the gamma-austenite grain boundary and in the steel matrix are in situ observed and analyzed through high temperature confocal laser scanning microscopy. The relationship between cooling rate and precipitation of V(C, N) from steel continuous casting bloom surface microstructure is further studied by scanning electron microscopy and electron dispersive spectrometer. Relative results have shown the effect of V(C, N) precipitation on alpha-ferrite phase transformation is mainly revealed in two aspects: (i) Precipitated V(C, N) particles act as inoculant particles to promote proeutectoid ferrite nucleation. (ii) Local carbon concentration along the gamma-austenite grain boundaries is decreased with the precipitation of V(C, N), which in turn promotes alpha-ferrite precipitation.
引用
收藏
页码：349 / 355
页数：7
相关论文
共 23 条
[1]   Additional grain refinement in recrystallization controlled rolling of Ti-microalloyed steels processed by near-net-shape casting technology [J].
Arribas, M. ;
Lopez, B. ;
Rodriguez-Ibabe, J. M. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 485 (1-2) :383-394
[2]   CONTINUOUS-CASTING OF STEEL - A DOSE CONNECTION BETWEEN SOLIDIFICATION STUDIES AND INDUSTRIAL-PROCESS DEVELOPMENT [J].
BOBADILLA, M ;
JOLIVET, JM ;
LAMANT, JY ;
LARRECQ, M .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 173 (1-2) :275-285
[3]   Hot Ductility of Nb- and Ti-Bearing Microalloyed Steels and the Influence of Thermal History [J].
Carpenter, K. R. ;
Dippenaar, R. ;
Killmore, C. R. .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (03) :573-580
[4]   The effect of coiling temperature on the microstructure and mechanical properties of a niobium-titanium microalloyed steel processed via thin slab casting [J].
Challa, V. S. A. ;
Zhou, W. H. ;
Misra, R. D. K. ;
O'Malley, R. ;
Jansto, S. G. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 595 :143-153
[5]   Influence of cooling paths on microstructural characteristics and precipitation behaviors in a low carbon V-Ti microalloyed steel [J].
Chen, Jun ;
Lv, Meng-yang ;
Tang, Shuai ;
Liu, Zhen-yu ;
Wang, Guo-dong .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 594 :389-393
[6]   SOME ASPECTS OF CONTINUOUS CASTING OF LOW CARBON MICROALLOYED STEELS WITH NIOBIUM AND TITANIUM [J].
Derda, W. ;
Wiedermann, J. .
ARCHIVES OF METALLURGY AND MATERIALS, 2012, 57 (01) :303-310
[7]  
Hasegawa H, 2001, TETSU TO HAGANE, V87, P433
[8]   Carbide precipitation kinetics in austenite of a Nb-Ti-V microalloyed steel [J].
Jung, Jae-Gil ;
Park, June-Soo ;
Kim, Jiyoung ;
Lee, Young-Kook .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (16-17) :5529-5535
[9]   In-situ observation of the precipitation of manganese sulfide in low-carbon magnesium-killed steel [J].
Kimura, S ;
Nakajima, K ;
Mizoguchi, S ;
Hasegawa, H .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2002, 33 (02) :427-436
[10]   NEW THEORY AND KINETIC MODELING OF STRAIN-INDUCED PRECIPITATION OF NB(CN) IN MICROALLOYED AUSTENITE [J].
LIU, WJ .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1995, 26 (07) :1641-1657
123