上海交通大学学报(英文版) ›› 2012, Vol. 17 ›› Issue (6): 653-657.doi: 10.1007/s12204-012-1340-7
ZHAO Su1* (赵素), WU Yu-juan2* (吴玉娟), HE Mei-feng3 (何美凤), ZHANG Li4 (张立)
出版日期:
2012-12-31
发布日期:
2012-12-30
通讯作者:
ZHAO Su1* (赵素), WU Yu-juan2* (吴玉娟)
E-mail:haosu@sdju.edu.cn, wuyj@sjtu.edu.cn
ZHAO Su1* (赵素), WU Yu-juan2* (吴玉娟), HE Mei-feng3 (何美凤), ZHANG Li4 (张立)
Online:
2012-12-31
Published:
2012-12-30
Contact:
ZHAO Su1* (赵素), WU Yu-juan2* (吴玉娟)
E-mail:haosu@sdju.edu.cn, wuyj@sjtu.edu.cn
摘要: The mechanical properties and microstructure of as-cast Nb-Ti microalloyed steel at different temperatures and cooling rates are investigated in this paper. The III brittle zone (700—900℃) is revealed. The reduction of the hot ductility is due to the film-like proeutectoid ferrite or the Nb(C, N) precipitates along the austenitic grain boundaries. In the temperature range of 850—1 000℃, with the increase of the cooling rate, the hot ductility decreases. However, in the range of 650—850℃, the appearance of large volume fractions of ferrite on austenite grain boundaries minimizes the effect of cooling rate on hot ductility. When the cooling rate is 10℃/s, austenite transforms more quickly to ferrite and at a lower temperature a larger amount of ferrite nucleates and precipitates in the grain, which leads to a sharper improvement in the hot ductility at 650℃.
中图分类号:
ZHAO Su1* (赵素), WU Yu-juan2* (吴玉娟), HE Mei-feng3 (何美凤), ZHANG Li4 (张立). Effects of Cooling Rates on Microstructures and Mechanical Properties of Nb-Ti Microalloyed Steel[J]. 上海交通大学学报(英文版), 2012, 17(6): 653-657.
ZHAO Su1* (赵素), WU Yu-juan2* (吴玉娟), HE Mei-feng3 (何美凤), ZHANG Li4 (张立). Effects of Cooling Rates on Microstructures and Mechanical Properties of Nb-Ti Microalloyed Steel[J]. Journal of shanghai Jiaotong University (Science), 2012, 17(6): 653-657.
[1] Brimacombe J K, Sorimachi K. Crack formation in the continuous casting of steel [J]. Metallurgical Transactions B, 1977, 8(2): 489-505. [2] Dobrovska J, Stransky K, Kavicka F, et al. Analysis of a transversal crack in a steel slab [J]. Materials Science Forum, 2008, 567-568: 105-108. [3] Ma F J, Wen G H, Tang P, et al. Causes of transverse corner cracks in microalloyed steel in vertical bending continuous slab casters [J]. Ironmaking and Steelmaking, 2010, 37(1): 73-79. [4] Mintz B, Yue S, Jonas J J. Hot ductility of steels and its relationship to the problem of transverse cracking during continuous casting [J]. International Materials Reviews, 1991, 36(5): 187-217. [5] Han Chun-liang, Zhang Jun-fen, Kang Yi, et al. Optimization of secondary cooling system of square billet caster [J]. Hebei Metallurgy, 2008(1): 31-33 (in Chinese). [6] Zhao Su, Zhang Li, Xu Guo-dong, et al. Thermodynamic calculations of the second-phase precipitation in Nb-Ti microalloyed steel [J]. Baosteel Technology,2012(2): 85-91 (in Chinese). [7] Zarandi F, Yue S. The effect of Boron on hot ductility of Nb-microalloyed steel [J]. ISIJ International,2006, 46(10): 591-598. [8] Lee U H, Park T E, Son K S, et al. Assessment of hot ductility with various thermal histories as an alternative method of in situ solidification [J]. ISIJ International,2010, 50(4): 540-545. [9] Ma F J, Wen G H, Tang P, et al. In situ observation and investigation of effect of cooling rate on slab surface microstrucutre evolution in microalloyed steel [J].Ironmaking and Steelmaking, 2010, 37(3): 211-218. [10] Mintz B, Lewis J, Jonas J J. Importance of deformation induced ferrite and factors which control its formation [J]. Materials Science Technology, 1997, 13(5):379-388. [11] Luo H, Karjalainen P, Porter D A, et al. The influence of Ti on the hot ductility of Nb-bearing steels in simulated continuous casting process [J]. ISIJ International,2002, 42(3): 273-282. [12] Cardoso G I S L, Mintz B, Yue S. Hot ductility of aluminium and titanium containing steels with and without cyclic temperature oscillations [J]. Ironmaking and Steelmaking, 1995, 22(5): 365-377. [13] Carpenter K R, Dippenaar R, Killmore C R. Hot ductility of Nb- and Ti-bearing microalloyed steels and the influence of thermal history [J]. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 2009, 40(3): 573-580. [14] Zarandi F, Yue S. Mechanism for loss of hot ductility due to deformation during solidification in continuous of steel [J]. ISIJ International, 2004, 44(10): 1705. [15] Cho K C, Mun D J, Kim J Y, et al. Effect of boron precipitation behavior on the hot ductility of boron containing steel [J]. Metallurgical and Materials Transactions A, 2010, 41: 1421-1428. |
[1] | JIANG Zhao (姜朝), HUA Xueming* (华学明), HUANG Lijin (黄立进),WU Dongsheng (吴东升), LI Fa. High Efficiency and Quality of Multi-Pass Tandem Gas Metal Arc Welding for Thick Al 5083 Alloy Plates[J]. Journal of Shanghai Jiao Tong University (Science), 2019, 24(2): 148-157. |
[2] | SUI Da-shan*(隋大山), GAO Liang (高 亮), CUI Zhen-shan (崔振山). Microstructure Evolution of Different Forging Processes for 12%Cr Steel During Hot Deformation[J]. 上海交通大学学报(英文版), 2015, 20(5): 606-611. |
[3] | TANG Wei-qin (唐伟琴), HUANG Shi-yao (黄诗尧), ZHANG Shao-rui (张少睿), LI Da-yong (李大永),. Polycrystalline Behavior Analysis of Extruded Magnesium Alloy AZ31[J]. 上海交通大学学报(英文版), 2013, 18(2): 186-189. |
[4] | SUN Weia* (孙威), XIONG Xianga (熊翔), LI Xiao-binb (李小斌), LI Guo-donga (李国栋). Mechanical Properties and Residue Stress of Four Kinds of ZrC Coatings Prepared by Chemical Vapor Deposition[J]. 上海交通大学学报(英文版), 2012, 17(6): 706-711. |
[5] | LI Da1,2 (李达), CUI Zhan-quan2 (崔占全), YANG Qing-xiang2* (杨庆祥),SUN Bing1 (孙兵), SUN. Microstructure and Property of Friction Stir Welding Joint of 7075Al and AZ31BMg[J]. 上海交通大学学报(英文版), 2012, 17(6): 679-683. |
[6] | WANG Gui-songa,b* (王桂松), LUO Yanga (罗阳), LIU Bao-xia (刘宝玺),YIN Chenga (尹成), GENG. Effect of Gr Content and Hot Extrusion on Tensile Properties of (Nano-SiCp+Gr)/Cu Composites Fabricated by Powder Metallurgy[J]. 上海交通大学学报(英文版), 2012, 17(6): 658-662. |
[7] | LIU Li1,2* (刘礼), MA Xiao-li1 (马晓丽), ZHAO Su3 (赵素) . Microstructure and Hardness of Ni-xSi Alloys [J]. 上海交通大学学报(英文版), 2012, 17(6): 648-652. |
[8] | RONG Hui (荣辉), QIAN Chun-xiang (钱春香). Development of Microbe Cementitious Material in China[J]. 上海交通大学学报(英文版), 2012, 17(3): 350-355. |
[9] | JIANG Bin1 (姜斌), LIU Xu-he1 (刘旭贺), WU Rui-zhi1 (巫瑞智), ZHANG Mi-lin1 (张密林). Microstructures and Mechanical Properties of Various Mg-Li Wrought Alloys[J]. 上海交通大学学报(英文版), 2012, 17(3): 297-300. |
[10] | WAN Xiao-feng (万晓峰), NI Hong-jun (倪红军), HUANG Ming-yu (黄明宇). Improvements of Elevated Temperature Strength and Creep Resistance of Mg-12Zn-4Al Based Alloy with Calcium Addition[J]. 上海交通大学学报(英文版), 2012, 17(3): 273-276. |
[11] | LIU Yong1 (刘勇), SHAO Shuang1 (邵爽), XU Chun-shui1 (徐春水), LIU Ke-ming2 (刘克明). Study on the Thermal Stability of Cu-14Fe in Situ Composite without and with Trace Ag[J]. 上海交通大学学报(英文版), 2012, 17(3): 268-272. |
阅读次数 | ||||||
全文 |
|
|||||
摘要 |
|
|||||