Microstructure and Mechanical Properties of ULCB Steels affected by advanced TMCP Technology
Good combination of high strength and high toughness has been considered as a critical factor of ultra-high strength steel plates. In this paper, a novel high strength steel plate of HSLA type containing Cu with 910MPa yield strength and 1163MPa tensile strength has been developed using an advanced TMCP (thermo-mechanical control processing) technology. The steel plates provide excellent combination of high strength, toughness and deformability. Microstructural evolution and mechanical properties of this steel during hot-working have been investigated. It is demonstrated that, at the relatively higher finish rolling temperature and cooling rate, the microstructure consists of acicular and granular bainite structures and a small amount of low bainite /martensite whose lath width is approximately 200~300nm. For the as-rolled conditions, despite the high strength and so low yield ratio, impact energy about 154J and fully ductility fracture at -90℃ can still be obtained as documented for as-hot rolled plates.
microstructure ultra-high strength and toughness advanced TMCP Technology ULCB Steels
Ziyong HOU Yunbo XU Di WU Wei-hua SUN She-e HU Guodong WANG
State Key Laboratory of Rolling and Automation, Northeastern University,Shenyang, Liaoning Province, Technical Center, Jinan Iron and Steel Group Company, Jinan 117000, CHINA State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, Liaoning Province
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
289-295
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）