Microstructure and properties of ultrafine - scale bainite steels

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• 作者：XU GuangLIU FengZUROB S HatemEMBURY DavidWANG Xiang
• 会议时间：2013-06-01
• 关键词：ultra - fine bainite ; microstructure ; property ; heat treatment
• 作者单位：XU Guang,LIU Feng(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)ZUROB S Hatem,EMBURY David,WANG Xiang(Department of Materials Science & Engineering,McMaster University,Hamilton,L8 S 4L7,Canada)
• 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

An ultra - fine bainitic steel was investigated in present study.The steel was heated t0 850℃ and austenized for 10 min followed by cooling t0 300℃ for isothermal different time for bainitic transformation.The specimens were examined using optical and transmission electron microscope.The experimental results show that the microstructure consists of ultra - fine bainite,martensite and retained austenite.Tensile test results show that the both high strength and good elongation are obtained after isothermal treatment for 90 min and 120 min at 300℃.The better comprehensive property of tested steel is attributed the ultra - fine mixture microstructure of bainite,martensite and retained austenite.The results propose the thermal processing route for a new promising high strength steel.