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| Continuous Cooling Transformation Microstructure and Mechanical Property of 1000MPa Low Carbon Bainitic Steel |
| YI Min1,2 ,WANG Guo-dong1,CHEN Tao2,WANG Li-feng2,TONG Qian2 |
1. The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004，Liaoning, China
2. The Research Institute of Technology, Shougang Group, Beijing 100043, China |
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Abstract The microstructure of Si-Mn low carbon bainitic steel during continuous cooling was investigated by Gleeble-2000 thermal simulation test. Furthermore, the low carbon bainitic steel was also manufactured in the Shougang Steel Rod Rolling Plant. The effects of the process factors on the microstructure and the mechanical properties were studied.The results show that the cooling rate has a direct impact on both the microstructures type and properties. Full bainitic microstructures with UTS is as high as 1000MPa could obtain for this series of low carbon bainitic steel at a cooling rate of 2.0℃/s. Fine bainitic structure with good plasticity and impact properties could be obtained through the controlled rolling process.
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Received: 18 April 2012
Published: 27 February 2013
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2013, Vol. 48 
