Weldability of 610MPa Grade High Strength Plate Steel 12MnNiVR for Oil Storage Tanks

摘要：

The weldability of 12MnNiVR was examined in terms of the simulated HAZ continuous cooling transformation (SH-CCT) diagram, microstructure and mechanical properties of the simulated coarse grain heat-affected zone (CGHAZ). When t8/5 is shorter, the microstructure mainly consists of lath bainite. When t8/5 is 60 s, the microstructure becomes coarser bainite. Some acicular ferrite appears beside lath bainite when t8/5=100s. Finally, a microstructure composed of polygonal ferrite, acicular ferrite, and small amount pearlite is obtained with a small amount of bainite at t8/5>100s. With the increase of t8/5, the hardness of CGHAZ decreases considerably. The minimum impact toughness of CGHAZ appears at t8/5=100s. The hardness and the toughness of CGHAZ remain above the specified values for steel 12MnNiVR.

关键词： 12MnNiVR weldability SH-CCT coarse grain heat-affected zone

作者: Yang Han Zhao Wengui Hua Yanping Hua Yanping Zhang Xiaobing Qu Jinbo

作者单位: Institute of Research of Iron and Steel (IRIS), Sha-steel Chief Engineer Office, Sha-steel, Jiangsu, 215625, 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: 629-632

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）