Phase Transformation and Mechanical Properties of an Ultrahigh Strength Steel

摘要：

The present study deals with the development of a low carbon high strength steel by thermomechanical controlled processing on a pilot scale. The continuous cooling transformation has yielded a flat top “C curve with the phase field occupied by a mixture of bainite and martensite. The microstructure of water quenched steel essentially consists of highly dislocated lath martensite along with fine (Ti, Nb)CN precipitates and twins. High strength steel with 1217-1298 MPa yield strength and 1372-1513 MPa ultimate tensile strength along with 16-12％ total elongation has been obtained in the range of 850 to 750 ℃ finish rolling temperature. The impact toughness value in the range of 45-72J was also achieved in the present steel.

关键词： ultrahigh strength steel thermomechanical controlled processing microstructure mechanical properties

作者: S. Chatterjee S.K.Ghosh P.S.Bandyopadhyay Sanak Mishra

作者单位: Department of Metallurgy and Materials Engineering, BESU,Shibpur,Howrah 711103,India Ordnance Development Centre,Metal and Steel Factory,Ishapore 743144,India ArcelorMittal India Limited,New Delhi 110025

会议类型: 国际会议

会议名称: The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)

会议地点: 北京

会议语种:英文

页码: 109-117

在线出版日期: 2011-05-31（万方平台首次上网日期，不代表论文的发表时间）