DEVELOPMENT OF-50℃ HIGH-STRENGTH AND HIGH-TOUGHNESS Nb-BEARING STEEL FOR LARGE SPHERE TANK

摘要：

　　The processes of steel-making,rolling and heat treatment have being constantly improving in Xingcheng Special Steel Co.,Ltd,and the complete sets of advance production technology and experiences have been formed.A new-50 hi℃ gh-strength steel plate for large sphere tank has been successfully developed.This steel was micro-alloyed with right amount of Nb,and it has excellent metallurgical quality,lower residual elements and higher performance stability.The relationships between the heat treatment process and the microstructure and mechanical property have been investigated.The results showed that the steel has good strength and toughness,especially,the central portion of the steel has excellent low-temperature toughness,and it can fully meet the technical requirements,namely the yield strength ReL≥500 MPa,the tensile strength 610MPa≤Rm≤730MPa,the elongation A≥17%,the-50℃ impact energy KV2≥80J(in the center of plate thickness).

关键词： High Toughness Large Sphere Tank Microstructure Property

作者: Qingfeng Ding Jingtao Li Tiansheng Wang Qingfeng Wang

作者单位: Xingcheng Special Steel Co.,Ltd.,Jiangyin,214429,China;State Key Laboratory of Metastable Materials Xingcheng Special Steel Co.,Ltd.,Jiangyin,214429,China State Key Laboratory of Metastable Materials Science and Technology Yanshan University,Qinhuangdao,0

会议类型: 国际会议

会议名称: Energy Materials 2014(第一届能源材料国际会议)

会议地点: 西安

会议语种:英文

页码: 911-915

在线出版日期: 2014-11-04（万方平台首次上网日期，不代表论文的发表时间）