|
|
|
| Research on hot ductility of Medium carbon microalloyed steel |
| gong ya-lin |
| |
|
|
|
|
Abstract High temperature mechanical behaviors of Nb and Nb、Ti containing steel were tested by Gleeble1500 thermal simulation testing machine. Meanwhile, influences of precipitate, phase change, cooling rate and dynamic recrystallization on hot ductility of the micro-alloy steel were also analyzed utilizing Gleeble. The results demonstrate that: the embrittlement region Ⅱ does not exist in Nb nor Nb、Ti containing steel. The temperature range of ductility region Ⅲ is about 950～700℃ in Nb containing steel and 900～725℃ in Nb、Ti containing steel respectively. Precipitation along the grain boundaries and during γ→α phase transformation are main factors which lead to a decrease on hot ductility of Nb and Nb、Ti containing steel. In the practice process the incidence of surface micro-cracks in micro-alloying steel can be reduced dramatically by decreasing specific water rate in secondary cooling zone.
|
|
Received: 02 November 2009
|
|
|
|
| [1] |
chishirong chishirongchishirong. [J]. , 2020, 45(3): 0-0. |
| [2] |
LAN Peng, TIE Zhan-peng, ZHANG Wei, MIAO Hong-sheng, YAN Qing-zhong, ZHANG Jia-quan. Research progress on spot segregation defects in continuously cast semi-products[J]. Iron and Steel, 2020, 55(2): 11-22. |
| [3] |
ZHANG Si-yuan1,2,LONG Mu-jun1,2,AI Song-yuan1,2,TAN Kai1,2,CHEN Deng-fu1,2,HUANG Yun-wei1,2. Oxidation behavior of continuous casting slabs and its effect on temperature during cooling process[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(2): 129-134. |
| [4] |
. Analysis and control of slag inclusion defect of low carbon steel slab[J]. , 2020, 45(2): 0-0. |
| [5] |
Gan-Shui ZHOU. Diagnosis of instability during trial production of the billet continuous casting in a steel factory in Vietnam[J]. , 2020, 45(2): 0-0. |
| [6] |
. Application of digital delivery in continuous casting engineering construction and production[J]. , 2020, 45(1): 0-0. |
|
|
|
|
2010, Vol. 45 
