摘要
通过DIL805-A测定了C-Si-Mn系600MPa级冷轧双相钢的CCT曲线,并在Gleeble 3500上模拟了双相钢的冷轧连退工艺。得出以下结论：双相钢的连退均热温度控制在800~820℃,保温时间不小于2min,缓冷温度控制在650~700℃,快冷结束温度不高于330℃,冷速大于15℃/s。通过EBSD检测、透射电镜检测、力学性能检测,结果显示邯钢生产的C-Si-Mn成分体系600MPa级冷轧双相钢马氏体的体积分数约为18%,{111}面织构强度为5.3,双相钢中马氏体类型为低碳马氏体,通卷屈服强度为344~365MPa,抗拉强度为605~645MPa,伸长率为24.5%~27%。其性能完全能满足汽车厂冲压安全防撞件的要求。
According to DIL805-A,the CCT curve of C-Si-Mn content 600MPa grade cold-rolled dual-phase steel was measured.The annealing process was simulated on Gleeble3500.The results show：The soaking temperature was 800-820℃,soaking time was≥2min,slow cooling temperature is 650-700℃,fast cooling temperature was≤330℃,cooling rate was≥15℃/s.According to the EBSD,the TEM,and the tension test.The properties of the 600MPa grade coldrolled dual-phase steel are：the volume fraction of martinet is about 18%,the value of{111}texture is 5.3,the martinet is low carbon martinet,yield strength was 344-365MPa,tensile strength was 605-645MPa,elongation was 24.5%to 27%. The mechanical property can meet the requirements of making the safety parts of automotive.
出处
《中国冶金》
CAS
2014年第4期31-35,共5页
China Metallurgy
关键词
冷轧双相钢
连续退火
高抗拉强度
cold-rolled dual-phase steel
continuous annealing
high tension strength
