Precipitation Law of Cementite in Hot Rolling 08Al Process
Aiming at the cracking problem of 08 Al broad strip in stamping and bending process,the microstructure characteristics of hot-rolled plate and precipitation law of cementite in low carbon steel were studied by adopting Gleeble,SEM and EDS.The results show that the microstructure of 08 Al is mainly equiaxed ferritic grain,but the grain size is quite uneven.The precipitation of free cementite is serious,about level 3.The amount of inclusions is few,and cementite mainly precipitates at the grain boundary.The amount of precipitation is mainly affected by the coiling temperature.