Development of JG785E High Strength High Toughness Steel Plates

摘要：

A high strength structure steel plate --brand JG785E, which with more than 690MPa yield strength,more than 47 joules toughness at minus 40 ℃ has been developed by Jigang of Shandong Steel Group P. R. China. The steel plates can be easily welded in engineering structure due to its lower carbon equivalent value. The maximum thickness of heavy plate is 50.88mm (2 inch), the yield strength is 710～860MPa, the toughness of steel plate is 139～336J at the temperature of -40 ℃. The microstructure of steel plate is lower carbon Bainite. The main solid dissolve elements are silicon and manganese. All parameters of reheating, rolling and accelerating cooling are controlled strictly. This TMCP procedure can ensure to get better mechanical properties of steel plates, and to keep the market competitive power and lower cost of manufacture. The cleanness of steel is high by refined in ladle furnace (LF), the contents of P and S is lower. It is the low carbon Bainite microstructure that possesses the high strength, excellent lower temperature toughness and better weld-ability without preheat process. The JG785E is typical brand of the Jigang’s high strength steel brands as the S690QL conforms to EN10025-6 and as the ASTM A514M conforms to USA quenching and tempering steel specification.

关键词： JG785E high strength steel Bainite high toughness weld-ability

作者: FENG Yong

作者单位: Structure Steel Dept. of Technology Center of Jigang Shandong Steel Group P. R. China 250101

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: 701-704

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）