Q500qE桥梁钢板的开发与探讨  

Development and Discussion of Q500qE Bridge Steel Plate

作　　者：吴俊平 Wu Junping(Nanjing Iron and Steel Co.,Ltd.)

机构地区：[1]南京钢铁股份有限公司

出　　处：《宽厚板》2025年第1期16-18,共3页Wide and Heavy Plate

摘　　要：作为集多项性能为一体的新一代高性能结构钢,Q500qE桥梁钢板通常以TMCP+回火方式生产。为了满足钢板性能要求,结合未再结晶区轧制技术,利用微合金碳氮化物沿奥氏体晶界的析出,起到阻止铁素体和珠光体长大的作用,从而细化晶粒、提高韧性和塑性,但是却不利于保证低屈强比。钢板经过回火处理后,位错密度下降,碳化物析出,抗拉强度降低,低温韧性进一步提高。As a new generation of high-performance structural steel with many properties,Q500qE bridge steel plate is usually produced by TMCP+tempering.In order to meet the performance requirements of the steel plate,com-bined with the rolling technology in the non-recrystallization zone,the microalloy carbonitrides are precipitated along the austenite grain boundary to prevent the growth of ferrite and pearlite,thus refining the grain,improving the toughness and plasticity,but it is not good for ensuring the low yield to tensile ratio.After tempering the steel plate,the dislocation density decreases,carbide precipitates,tensile strength decreases,low temperature toughness further improves.

关 键 词：Q500qE桥梁钢板 屈强比 冲击韧性 

分 类 号：TG1[金属学及工艺—金属学]