表层组织超细化轧制工艺在L245级管线钢板开发中的应用  

Application of Rolling Process for Ultrafine Grained Ferrite in Surface Layers to L245 Plates

作　　者：范建文[1] 严春莲[1] 王彦锋[1] 李光[1] 谢瑞萍[1] 

机构地区：[1]首钢集团总公司技术研究院,北京100041

出　　处：《钢铁》2006年第6期38-42,共5页Iron and Steel

基　　金：北京市科技新星计划资助项目(H013610320111)

摘　　要：采用表层组织超细化轧制工艺在首钢3 500 mm中厚板生产线上进行了L245管线钢板的批量试制.结果表明,采用这种特殊的控轧控冷工艺,普碳钢的化学成分可保证钢板的力学性能达到厚规格L245管线钢板的要求.试制钢板表层铁素体晶粒达到12级,中心部位10级,屈服强度达到300～365 MPa,抗拉强度达到430～480MPa,同时保持29%～35%的伸长率,-10℃夏比冲击功130 J以上,剪切面积85%以上.在几乎不增加冶金成本的前提下,试制钢板具有优良的强度、塑性配合,优良的低温韧性水平.The L245 （AP15L. BPSL2） plates are produced on 3 500 mm 4-high mill at Shougang Group to obtain ultra-fine grained ferrite in the surface layers. By special controlled rolling and accelerated cooling process, mechanical properties of plain carbon steel can meet the requirements of thick L245 plates. The grade of grain size in surface layers is 12 and 10 in central layer of the plates. The yield and tensile strength are 300-365 MPa and 430-480 MPa respectively with the elongation of 29%-35%. The sharpy V-notch impact energy is above 130 J with the shear area above 85%at -10℃ With little increase in cost of steel making, the steel with good combination of strength and plasticity and satisfied toughness at low temperature can be produced by controlled rolling and cooling.

关 键 词：超细晶粒铁素体 普碳钢 管线钢板 

分 类 号：TG335[金属学及工艺—金属压力加工]