Effects of austenite deformation on CCT curves and microstructures of advanced atmospheric corrosion resistant steel
- 作者：SONG FengmingDU LinxiuWEN Donghui
- 会议时间：2013-06-01
- 关键词：atmospheric corrosion resistant steel ; CCT curve ; microstructure ; austenite deformation
- 作者单位：SONG Fengming(State Key Lab of Rolling Technology & Automation,Northeastern University,Shenyang 110004,Liaoning,China;Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China)DU Linxiu(State Key Lab of Rolling Technology & Automation,Northeastern University,Shenyang 110004,Liaoning,China)WEN Donghui(Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China)
- 母体文献：第五届宝钢学术年会论文集
- 会议名称：第五届宝钢学术年会
- 会议地点：上海
- 主办单位：中国金属学会
- 语种：chi
摘要
The CCT curves of advanced atmospheric corrosion resistant steel were measured using Thermecmastor-z thermal simulator and the effects of austenite deformation on the curves and microstructures under continuous cooling conditions was analyzed.The results showed that the Bs elevated while Bf lowered,and the critical cooling rate preventing ferrite transformation was increased,so the ferrite and bainite transformation were enhanced while martensite transformation was delayed.The microstructures were observed through the optical microscope and the hardness was tested.It was found that the volume fraction of ferrite was increased after austenite deformation when cooling rate below 0.5℃/s;while the matrix microstructure of non-deformation samples were bainite even the cooling rate is 0.1℃/s.The hardness was increased as the cooling rates increases due to the phase transformation strengthening The ferrite-bainite microstructure can be obtained within a large scope of cooling rates.