摘要
采用控制轧制工艺对0.14%~0.18%C,1.40%~1.60%Mn Q355D钢250 mm连铸板坯进行热轧,结果表明,在粗轧温度1050~1130℃、精轧温度920℃、终轧温度880℃控制轧制条件下,终冷温度在670℃以下生产的厚板组织细小均匀,生产70 mm和80 mm规格厚板性能符合Q355D级别要求,并且Z25断面收缩率(RA)为58%~64%满足Z25方向RA≥25%的要求。
The 250 mm casting slab of steel Q355 D bearing 0.14%~0.18%C and 1.40%~1.60%Mn is hot-rolled by the controlled rolling process.The results show that the microstructure of rolled plate is fine and uniform by rough rolling at 1050~1130℃finishing rolling at 920℃and final rolling at 880℃,and the final cooling below 670℃,the properties of the 70 mm and 80 mm thick plate can meet the requirements of Q355 D steel grade and the Z25 reduction of area(RA)is 58%~64%to meet the requirement of Z25 direction RA≥25%.
作者
吕晓芳
孙伟
杜慧起
LüXiaofang;Sun Wei;Du Huiqi(Department of Resources and Environmental Engineering,Xingtai Vocational and Technical College,Xingtai 054000;School of Mechanical Engineering,Tianjin Sino-German University of Applied Science,Tianjin 300350)
出处
《特殊钢》
2021年第2期68-71,共4页
Special Steel
关键词
低合金钢Q355D
厚板
控轧控冷
力学性能
组织
Low Alloy Steel Q355D
Thick Plate
Controlled Rolling and Controlled Cooling
Mechanical Properties
Microstructure
