摘要
针对罩式炉工业化生产590 MPa含锰低合金冷轧钢带表面氧化色缺陷,分析了表面氧化色的主要组成。实验室采用马弗炉模拟了罩式炉退火工艺,验证了金属锰薄片对钢带表面氧化色的抑制作用。结果表明,金属锰薄片可以通过消耗炉内氧化性气氛,保护试样表面在退火过程中不被氧化。罩式炉工业化退火采用冷点温度620℃、热点温度630℃、保温时间25h及全过程40m3/h氢气流量吹扫制度,同时退火过程中在每个对流板中心处装入125kg纯金属锰薄片,可避免工业化生产590 MPa含锰低合金冷轧钢带边部出现氧化色缺陷,同时力学性能满足要求。
As to the defect of oxide color on the surface of 590 MPa low alloy cold rolled steel strip containing Mn produced by BAF,the main composition of surface oxide color was analyzed.The annealing process of BAF was simulated by muffle furnace in the laboratory,and the inhibition effect of metal manganese sheet on the oxide color of steel strip was verified.The results showed that the metal manganese sheet could consume the oxidizing atmosphere in the furnace and protect the sample surface from oxidation during annealing.The industrial annealing of BAF adopted the cold point temperature of 620℃,the hot spot temperature of 630℃,the heat holding time of 25 hand the hydrogen blowing in the whole process with the flow rate of 40 m3/h.At the same time,125 kg pure metal manganese sheet was placed at the center of each convection plate during the annealing process,which could avoid the defect of oxide color at the edge of 590 MPa low alloy cold rolled steel strip containing Mn,and meet the requirements of the mechanical properties.
作者
杜昕
罗晓阳
赵小龙
赵占彪
王强
狄彦军
DU Xin;LUO Xiao-yang;ZHAO Xiao-long;ZHAO Zhan-biao;WANG Qiang;DI Yan-jun(Research Institute,JISCO Hongxing Iron and Steel Co.,Ltd.,Jiayuguan 735100,Gansu,China)
出处
《中国冶金》
CAS
北大核心
2019年第8期30-33,70,共5页
China Metallurgy
关键词
590
MPa含锰钢带
罩式炉
氧化色
退火温度
590 MPa steel strip containing Mn
BAF
oxide color
annealing temperature
作者简介
杜昕(1972—),男,大学本科,高级工程师,E-mail:duxin@jiugang.com
