Research on Formation Mechanism and Influencing Factors of Granophyric Defect on High Strength Ship Plate
Formation mechanism and influencing factors of granophyric defect on high strength ship plate were studied by SEM and hot rolling experiment.The results show that granophyric defect is consisted of residualoxide scale after shot-blasting.Unsmooth interface between oxide scale and substrate and inhomogeneous thickness of oxide scale are main reasons for the formation of spots.Decreasing the contents of Si and Mn can reduce the formation of silicon olivine and manganese olivine in heating process.And it can increase descaling of the steel plates and reduce residual oxide iron scale on plate surface.Enhancing the rolling temperature and finish cooling temperature can effectively reduce the length of interface between oxide scale and substrate.The effect of shot-blasting is better by using ACC cooling-down method.
high strength ship plategranophyric defectfinal cooling temperatureinterface length
NETL
NSTL
万方数据
维普
