|
|
Precipitation Behavior and Textural Evolution of Cold-Rolled High Strength Deep Drawing Dual-Phase Steels |
WANG Zhi-gang1,2,ZHAO Ai-min2,ZHAO Zheng-zhi2,YE Jie-yun2,CHEN Jing-jing2,HE Jian-guo2 |
1. School of Materials and Science Engineering, Jiangxi University of Science and Technology, Ganzhou,341000, Jiangxi, China 2. National Engineering Research Center of Advanced Rolling, University of Science and Technology Beijing, Beijing 100083, China |
|
|
Abstract Low-carbon Cr-Mo micro-alloyed deep drawing dual-phase steels were designed in laboratory. As the microstructure and texture evolution in hot-rolled strips and annealed sheets were investigated using SEM,TEM and XRD technologies, the attribution of solute Mo and MoC particles to DP sheets�� drawing capacity was investigated. The precipitation thermodynamics were also calculated by Thermo-calc software. Results show that the precipitates in hot-rolled strips mainly are MoC, AlN and MnS, and with the increase of Mo-addition, finer and denser MoC particles precipitated in matrix and along grain boundaries of ferrite more easily. Weak textures are shown in the hot-rolled strips, and {112}<110> and {223}<110> components tend to be stable in subsequent cold rolling process. During annealing, on one hand, the development of <111>��ND texture is suppressed because finer MoC particles prevent the grain boundary migration. On the other hand, unfavorable texture {001}<110> significantly reduces with Mo increasing, which is attributed to that part of solution C in matrix has been fixed during recrystallization. In addition, the addition of Mo can enhance hardenability strongly and MoC easily re-dissolve at high temperature, which is favor to form martensite in dual-phase steel.
|
Received: 20 September 2012
Published: 17 December 2013
|
Fund:Projects Sponsored by the National Natural Science Foundation of China |
|
|
|
[1] |
Xiang-lei Dong,Hui Xing,,Kang-rong Weng,Hong-liang Zhao. Current development in quantitative phase-field modeling of solidification[J]. Chinese Journal of Iron and Steel, 2017, 24(9): 865-878. |
[2] |
H. Gonzalez,J.A. Ramos-Banderas,E. Torres-Alonso,G. Solorio-Diaz,C.A. Hern��ndez-Bocanegra,. Multiphase modeling of fluid dynamic in ladle steel operations under non-isothermal conditions[J]. Chinese Journal of Iron and Steel, 2017, 24(9): 888-900. |
[3] |
Zong-ye Ding,Di Zhang,Qiao-dan Hu,,*,Long Zeng,Jian-guo Li,. Constitutive analysis and optimization on hot working parameters of as-cast high Cr ultra-super-critical rotor steel with columnar grains[J]. Chinese Journal of Iron and Steel, 2017, 24(9): 916-924. |
[4] |
Yang Yun,Qing-wu Cai,,Bao-sheng Xie,*,Shuang Li. Effect of tempering temperature on strain hardening exponent and flow stress curve of 1000 MPa grade steel for construction machinery[J]. Chinese Journal of Iron and Steel, 2017, 24(9): 950-956. |
[5] |
LIU Bin,,WU Run,WANG Meng,LIANG Wen,LIU Dong,ZHOU He- rong. Low cycle fatigue properties of hot- rolled high strength dual phase steel[J]. Chinese Journal of Iron and Steel, 2017, 29(8): 667-670. |
[6] |
HUANG Rui,WANG Huan- rong,LIU Jun- liang. Influence of coiling temperature on nano- precipitated particles of advanced nano- precipitate strengthened high strength steel[J]. Chinese Journal of Iron and Steel, 2017, 29(8): 684-689. |
|
|
|
|