Low Cost High Performance Steel Plate with Superior HAZ Toughness for Large Heat Input Welding

摘要：

In this paper, a laboratory study has been made to develop low cost high performance steel plates with superior HAZ toughness for large heat input welding. Simulated results show that the absorbed impact energy of heat-affected zone (HAZ) at -20℃ reaches above 200J when large heat inputs of 100 to 400kJ/cm were applied, suggestive of superior HAZ toughness for large heat input welding of developed steel plate. The microstructures in HAZ are transformed from mainly fine ferrite and bainite at 100kJ/cm, through an intermediate stage of ferrite,bainite and pearlite at 200 and 300kJ/cm, to nearly fine ferrite and pearlite at 400kJ/cm. The prior austenite grain size and ferrite grain size in HAZ are controlled to ～50 and ～20μm, respectively. The high HAZ toughness is due to the inhibition of prior austenite grain size at high temperatures and the formation of beneficial microstructures to HAZ toughness during continuous cooling.

关键词： low cost high performance large heat input welding heat-affected zone (HAZ) steel plate

作者: WANG Huan-rong WANG Wei LIU Gang

作者单位: Department of Structural Steels, Baosteel Research Institute, 889 Fujin Road, Shanghai 201900, P. R. China

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: 465-468

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）