冷轧钢带65Mn全氢罩式炉球化退火工艺研究及应用  

Study and application of spheroidizing annealing process in 65Mn full hydrogen bell furnace for cold rolled steel strip

作　　者：刘涛 吕瑞国[1] 唐小勇 喻建林 李声慈 LIU Tao;LYU Ruiguo;TANG Xiaoyong;YU Jianlin;LI Shengci(Xinyu Iron and Steel Group Co.,Ltd.,Xinyu 338001,Jiangxi,China;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]新余钢铁股份有限公司,江西新余338001 [2]江西理工大学材料冶金化学学部,江西赣州341000

出　　处：《江西冶金》2021年第6期24-29,共6页Jiangxi Metallurgy

基　　金：江西省自然科学基金项目资助(2020BAB214004);江西理工大学清江青年英才支持计划项目(JXUSTQJYX2020011)。

摘　　要：文中主要对冷轧钢带65Mn全氢罩式炉球化退火工艺进行研究。结果表明,冷轧钢带65Mn宜采用亚温球化退火工艺。进一步试验确定了球化退火温度、保温时间、加热速度等关键工艺参数,制定了冷轧钢带65Mn的罩式炉球化退火工艺。经新钢优特钢带公司全氢罩式炉生产实践证明:球化退火后的冷轧钢带65Mn抗拉强度均低于560 MPa,延伸率均在30.0%以上,强度低、塑性好;球化级别在2.5~3.0级,球化效果良好,完全能满足产品的使用要求。In this paper,the spheroidizing annealing process of 65Mn cold rolled coil in full hydrogen bell type furnace was studied.The results show that sub-temperature spheroidizing annealing process is suitable for cold rolled coil 65Mn.The key process parameters such as spheroidizing annealing temperature,holding time and heating speed were determined by further experiments,and the spheroidizing annealing process of 65Mn cold rolled coil in bell type furnace was established.The production practice of all hydrogen bell type furnace in Youte steel strip company of Xinyu Iron and Steel Group Co.,Ltd.shows that the tensile strength of 65Mn cold rolled coil after spheroidizing annealing is lower than 560 MPa,the elongation is more than 30.0%,the strength is low and the plasticity is good;The spheroidization grade is 2.5~3.0,and the spheroidization effect is good,which fully meets with the market requirements of the product.

关 键 词：冷轧钢带 65Mn 球化退火 罩式退火炉 

分 类 号：TG156.2[金属学及工艺—热处理] TF758[金属学及工艺—金属学]