|
|
Key Technologies of Internal Quality Control for Continuously Cast HighSpeed Rail Steel Bloom |
CHEN Yong1,2,YANG Subo3,ZHU Miaoyong1 |
1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China; 2. Panzhihua Iron and Steel Research Institute, Panzhihua 617000, Sichuan, China;
3. Vanadium Recovery and Steelmaking Plant, Panzhihua New Steel and Vanadium Co., Ltd., Panzhihua 617062, Sichuan, China |
|
|
Abstract The key technologies of internal quality control for continuously cast rail steel bloom at Panzhihua steel, such as mold electromagnetic stirring (MEMS), secondary cooling regime, and dynamic soft reduction at the end of solidification, and their results are introduced. The practice in recent 3 years shows that the above mentioned key technologies are helpful to control rail steel bloom central defects, such as central segregation, center looseness and central crack. The internal quality of continuously cast rail steel bloom was superior, the yield of liquid steel was up to 98.55%, the qualified rate of blooms was 99.97%, the grade of center looseness, central segregation and shrinkage cavity were ≤1.0, while central cracking and middle cracking were ≤0.5, and central segregation index of carbon was ≤1.05 in 2005. The rails produced from continuously cast blooms meet the requirements of highspeed 350 km/h tracks.
|
Received: 01 January 1900
|
|
|
|
[1] |
WANG Xing-yu, HAN Yan-shen, LIU Qing, XIAO Dong,CHEN Jun, GUAN Min. Effect of F-EMS on inner quality of spring steel continuous casting billet[J]. Iron and Steel, 2020, 55(5): 59-67. |
[2] |
. Formation reasons and control measures of abnormal oscillation marks for 10B21 cold-heading steel billets[J]. , 2020, 45(3): 0-0. |
[3] |
chishirong chishirongchishirong. [J]. , 2020, 45(3): 0-0. |
[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] |
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. |
|
|
|
|