Analysis and control of inclusion defects on surface of LCAK hot-rolled coil
Inclusion defects in samples taken from LCAK hot-rolled coils of SPHC and DC01 steel series were analyzed with metallographic methods as well as the relevant production process parameters.The results showed that entrapment of mould powder was the main cause of the defects,and viscosity of powder,mold oscillation parameters,flame cleaning operation of slab and reheating process all could affect the occurrence rate of the defects.With countermeasures including using higher viscosity powder,optimizing mold oscillation parameters,standardizing flame cleaning operation,increasing reheating temperature and so on,the average occurrence rate per month of the inclusion defects on surface of the coil was decreased from 4.52 ％-4.89 ％ to less than 2 ％ and kept stable.
surface inclusion defectpowder viscositymold oscillationslab flame cleaningreheating process
NETL
NSTL
万方数据
维普
