420MPa级高强建筑结构用钢板的开发  

Development of 420 MPa Grade Higher Strength Steel Plate for Building Structure

作　　者：李可斌[1] 安海玉[1] 王强[1] 臧淼[1] 王云阁[1] 尹绍江[1] 

机构地区：[1]河钢唐钢技术中心

出　　处：《宽厚板》2017年第4期31-33,共3页Wide and Heavy Plate

摘　　要：在现有建筑结构用钢生产经验的基础上,采用"转炉自动化炼钢→LF炉精炼→重压下板坯连铸→TMCP(超快冷)"生产工艺,通过添加微合金元素V、Ti和Nb,控制N含量,达到微合金化效果,保证钢水的洁净度,同时合理设计控制轧制工艺,严格控制冷却参数,成功开发出Q420GJ级别建筑结构用钢板。产品实物性能表明:钢板的屈服强度、抗拉强度等各项力学性能指标均能够满足国标要求,具有较窄的屈服强度分布,同时实现了较低的屈强比,符合钢结构设计规范。Based on production experience of building structural steel and process of automatic BOF steelmaking, LF ref ining,heavy reduction slab casting,TMCP including UFC,Q420GJ building structural steel plate is developed by adding microalloying elements V, Ti and Nb, controlling nitrogen content to maintain microalloying result and steel cleanliness,rational designing controlled rolling process, stringent controlling cooling parameters. The actual product properties prove that the mechanical properties indicators such as yield strength, tensile strength al l satisfy the require-ments of national standards with narrow yield strength distr ibution and lower yield and tensile rat io,which conforms to the design criteria of steel structure.

关 键 词：建筑用钢 高强度 控轧控冷 

分 类 号：TF76[冶金工程—钢铁冶金] TG335.5[金属学及工艺—金属压力加工]