冷轧Q345钢退火工艺的实验研究  

Experimental Study on Annealing Process of Cold Rolled Q345 Steel

作　　者：张明亚[1] 朱伏先[1] 马世成[1] 张自成[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第8期1111-1114,1123,共5页Journal of Northeastern University(Natural Science)

基　　金："十一五"国家科技支撑计划项目(2006BAE03A08);中央高校基本科研业务费专项资金资助项目(N100607002)

摘　　要：对热轧Q345钢进行冷轧并模拟其连续退火工艺,对所研究的钢板进行显微组织分析和力学性能测试,旨在开发出具有良好性能的双相钢.研究结果表明:试制的退火钢板组织较为复杂,具有不同含量的铁素体、珠光体、马氏体等组织;具有较高的抗拉强度和较低的屈强比,但其延伸率较低,仅为14%左右.由于钢板的碳含量较高,因此,为获得良好的综合性能,不能按照传统的热处理工艺进行模拟,而应适当降低均热温度且提高快冷始温.For developing new kind of DP steel,Q345 steel was cold-rolled and then the continuous annealing process was simulated.Microstructural and mechanical results showed that the microstructure is complicated and the matrix is composed of ferrite,pearlite and martensite.The samples exhibit the high tensile strength and the low yield ratio.The elongation percentage is very low,only about 14%.Because of high carbon content,the conventional heat treatment process couldn＇t be adopted and only low soaking temperature and the higher starting temperature of rapid cooling should be adopted.

关 键 词：双相钢 连续退火 高强钢 显微组织 力学性能 

分 类 号：TG142.4[一般工业技术—材料科学与工程]