CB890QL钢履带式起重机臂架用热轧管坯控轧工艺分析  

Controlled Rolling Process of Hot Rolled Tube Bloom of CB890QL Steel for Crawler Crane

作　　者：轩康乐 江宏亮[1] 张新文[1] 孙智伟 张春香 高华耀 XUAN Kangle;JIANG Hongliang;ZHANG Xinwen;SUN Zhiwei;ZHANG Chunxiang;GAO Huayao(Special Steel Company,Jiangsu Yonggang Group Co Ltd,Zhangjiagang 215628)

机构地区：[1]江苏永钢集团有限公司特钢公司,张家港215628

出　　处：《特殊钢》2022年第4期36-40,共5页Special Steel

摘　　要：对305mm×315mm中间坯以连轧速度0.6-0.8m/s,开轧温度950-1028℃控轧的低碳Nb-V微合金化CB890QL钢进行组织分析,得出试验钢种在轧制过程中以动态回复为主;在0.8m/s轧制速度下,进连轧温度从1028℃降至950℃,钢的晶粒不断细化,Φ200mm钢也存在晶粒尺寸差异较大的情况;0.6m/s的轧制速度下,随着温度的降低晶粒大小并不是线性变化的。在进连轧温度为980℃,0.6m/s轧制速度下,试验钢可获得较为细小均匀的组织。By analysis on structure of low carbon Nb-V micro-alloying CB890QL steel with control-rolling from 305 mm×315 mm mediate bloom by continuous rolling speed 0.6-0.8 m/s at 950-1028℃,it is obtained that the dynamic recovery of the tested steel is mainly in rolling process,with the rolling speed of 0.8 m/s,as the rolling temperature is reduced from 1028℃ to 950℃,the grains of steel are refined continuously,and there is also a big difference in grain size.With the rolling speed 0.6 m/s inΦ200 mm steel,the grain size does not change linearly with the decrease of temperature.When the continuous rolling temperature is 980℃ and the rolling speed is 0.6 m/s,the fine and uniform microstructure of test steel can be obtained.

关 键 词：CB890QL钢 回复 再结晶 轧制速度 进连轧温度 

分 类 号：TH213.7[机械工程—机械制造及自动化] TG335[金属学及工艺—金属压力加工]