摘要
在微Mo成分设计基础上采用TMCP+T(回火)和Q+T(淬火+回火)两种不同工艺来生产485 MPa级新型耐候钢A709 HPS485W,并对其金相组织、力学性能进行对比。结果表明:TMCP+T工艺生产钢板的组织由贝氏体和铁素体组成,具有高强度、低屈强比、高耐腐蚀性能和经济性的特点;Q+T工艺生产钢板的组织由回火贝氏体+回火索氏体组成,具有高强度、高耐腐蚀性能的特点。
On the basis of micro-molybdenum composition design,the new type of 485 MPa grade weathering steel A709 HPS485W is produced by the two different processes of TMCP+tempering and quenching+tempering,the microstructure and mechanical properties of the steel are compared.The results show that the microstructure of the steel plate produced by TMCP+tempering process is composed of bainite and ferrite with the features of high strength,low yield to tensile ratio,high weathering and economy.The microstructure of the steel plate produced by quenching+tempering process is composed of bainite and tempered sorbite with the features of tempered high strength and high weather resistance.
作者
顾小阳
Gu Xiaoyang(Plate Business Division of Nanjing Iron and Steel Co.Ltd.)
出处
《宽厚板》
2025年第4期33-36,共4页
Wide and Heavy Plate
关键词
高强度
低屈强比
耐候桥梁钢
High strength
High yield to tensile ratio
Weathering steel for bridge
