Q355B低合金高强度结构钢圆钢的开发试制和生产  

Development and Production of Q355B Low Alloy High Strength Structural Steel

作　　者：廉京习 解洪超 贺继勇 吴向明 李鹏超 LIAN Jingxi;XIE Hongchao;HE Jiyong;WU Xiangming;LI Pengchao(Linyi Iron and Steel Investment Group Special Steel Co.,Ltd.,Linyi 276023,China)

机构地区：[1]临沂钢铁投资集团特钢有限公司,山东临沂276023

出　　处：《山东冶金》2023年第6期13-16,共4页Shandong Metallurgy

摘　　要：根据某下游用户个性化需求,临沂钢铁投资集团特钢有限公司发挥新装备、新工艺的优势,首次开发试制了Q355B低合金高强度结构钢定制化协议标准产品的生产,采用BOF转炉→LF精炼炉→RH真空脱气→连铸→轧制工艺,一次成功开发试制生产了定制产品Q355B低合金高强度结构圆钢。经工艺跟踪及产品检验,各项工艺参数符合要求,实物检验数据表明,其产品化学成分、金相组织、夹杂物、低倍、拉伸性能、冲击性能和表面硬度指标均满足用户协议要求,同时氧氮氢含量较低,钢种纯净度、奥氏体晶粒度不粗于5级,轧钢采用高刚度短应力轧机和KOCKS减定径机组生产,产品尺寸外形、表面质量较高。According to the personalized requirements of a downstream user,the customized protocol standard product of Q355B low alloy high strength structural steel was developed and trial-produced for the first time by giving full play to the advantages of new equipment and new technology in Linyi Iron and Steel Investment Group Special Steel Co.,Ld.The company has successfully developed and trial-produced customized Q355B low alloy high strength structural round steel by adopting BOF converterLF refining furnaceRH vacuum degassingCC continuous casting rlling process.Affer process tracking and product inspection,the process parameters meet the requirements.The physical test data show that the chemical composition,metallographic structure,inclusions,macrostructure,tensile properties,impact properties and surface hardness of the product meet the requirements of the user agreement.At the same time,the content of oxygen,nitrogen and hydrogen is low,the purity of steel grade,austenite grain size is more than grade 5,the rolling steel is produced by high steel degree short stress rolling mill and KOCKS reducing sizing unit,the product size,shape and surface quality are high.

关 键 词：Q355B 冶炼 化学成分 温度控制 冲击性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]