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| Development of Hot Rolling Plate Q450NQR1 With High Corrosion Resistant for Railway Boxcar |
| LU Jun-hui1,WANG Xiao-chun2,LIU Jia-qi1,ZHANG Cheng-wu2,ZHANG Hui1,PIAO Feng-yun2 |
1. State Key Laboratory of Advanced Steel Processing and Products, Central Iron and Steel Research Institute, Beijing 100081, China
2. Technology Center, Tonghua Iron and Steel Group Co., Ltd., Tonghua 134000, Jilin, China |
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Abstract The hot rolling plate Q450NQR1 with high corrosion resistant for railway boxcar was developed by hot metal pre-treatment—120t top and bottom combined blown converter—LF refining—FTSC continuous casting machine—2R—5F mill—coiling with TMCP process. The results show that the microstructure of plate is ferrite-pearlite and grain size rating is 12, the yield strength and tensile strength are 509.2MPa and 580MPa, respectively. The impact absorbing energy at －40℃ is about 170J, and corrosion resistant is very good, and the corrosion rate for 144h is decreased 33.33% compared with the Q345B. The production can meet the requirement of railway boxcar.
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Received: 27 June 2012
Published: 27 February 2013
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2013, Vol. 48 
