|
|
Strain Induced OverEquilibrium Ferrite Fraction in Low Carbon Steel |
CHEN Ying1,CHEN Qian1,HAO Ruihua2,ZHAO Xiaoli1 |
1. Institute for Structure Materials, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Long Products Division, Baoshan Iron & Steel Bao Steel Branch Co Ltd, Shanghai 201900, China |
|
|
Abstract The microstructure evolutions during isothermal holding combined with subsequently accelerated cooling were investigated in deformed low carbon steel.It is found that overequilibrium ferrite volume fraction would exist at room temperature after heavy deformation at different temperatures nearby Ae3.Reverse transformation from ferrite to austenite would occur during isothermal holding.This relaxation phenomenon has a dynamic characteristic which is similar to C curve.Further,ferrite grain size would grow combined with the ferrite volume fraction decrease during isothermal hoding.But the stability of overequilibrium ferrite,no matter on volume fraction or on grain size,would increase with the deformation temperature drop.
|
Received: 01 January 1900
|
|
|
|
[1] |
YAN Xue-qiang1,2,ZHENG Wan1,2,WANG Guo-wei1,2,YAN Wen1,LI Guang-qiang1,2. Effect of microporous MgO refractories on steel cleanliness[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(6): 483-490. |
[2] |
SHAO Cheng-wei, WANG Jun-tao, ZHAO Xiao-li, HUI Wei-jun. Microstructure and mechanical properties of intercritically annealed Al-contain medium Mn steel[J]. Iron and Steel, 2020, 55(5): 87-93. |
[3] |
. 本钢三连铸的单流宽板坯连铸机从达涅利公司引进,于2008年12月4日建成投产,结晶器液位控制采用NKK技术。本文介绍了7#连铸机生产过程中,结晶器液位出现不稳定性波浪的原因,并通过改进NKK液位控制工艺,微调PID控制参数,以及优化结晶器流场等措施,提高了宽幅汽车板生产时的结晶器液位控制精度,并且解决和消除了不稳定型波浪的问题,使宽幅汽车板的轧制成材率大幅提升。[J]. , 2020, 45(2): 0-0. |
[4] |
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. |
[5] |
ZHANG Yu-cheng,WEN Juan,CUI Gui-bin,JIA Hui-ping,QI Qi-ge,JU Xin-hua. Analysis of microstructure and stability of retained austenitein X90 pipeline steel[J]. PHYSICS EXAMINATION AND TESTING, 2019, 37(4): 6-11. |
[6] |
LIU Chun-quan1,2,PENG Qi-chun1,2,XUE Zheng-liang1,2,LI Jian-li1,2,ZHU Hang-yu1,2. Effect of different heat treatment processes on microstructure and mechanical properties of Nb-Mo microalloyed medium-Mn steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(12): 1100-1114. |
|
|
|
|