液化气船用P690QL2球罐钢板的研制

Development of P690QL2 spherical tank steel plate for liquefied gas tankship

通过对液化气船高强度球罐钢板使用特性的分析,采取低碳高锰,控制Al/N比,发挥Cr、Mo、Ni和B的淬透性的成分设计思路,成功开发了一种经济型易焊接的690 MPa低温调质钢板,钢板的力学性能优于标准EN10028-6:2004和船级社的要求。

Based on the analysis of the characteristics of high-strength spherical tank steel plate for liquefied petroleum gas tankship,a kind of economical and easy-welding 690 MPa low-temperature tempered steel plate has been successfully developed by adopting low carbon hadfield,controlling Al/N ratio,and giving full play to the hardenability of Cr,Mo,Ni and B.As a result,the mechanical properties of this kind of steel plate are better than the standard of EN10028-6:2004 and even higher than the requirements of the classification society.