IF钢的表面波纹度

Surface waviness of IF steel

采用光学显微镜观察了IF钢在热镀锌过程中不同的退火温度和光整工艺条件下的显微组织,对不同光整工艺样品的表面形貌进行了光学显微镜和扫描电镜观察,并测试了不同的退火温度和光整工艺样品的表面波纹度。结果表明:退火温度对表面形貌无影响,光整辊粗糙度对表面形貌有影响;随着退火温度的升高,晶粒尺寸增加,再结晶温度以上降低退火温度时,抑制基板再结晶晶粒长大,晶粒细小均匀;当退火温度820℃,此时晶粒尺寸为16μm,同时光整辊粗糙度为1.6μm时,表面波纹度Wsa较好。

Microstructure of IF steel was observed by OM with different annealing temperature and different work roll conditions in hot dip galvanizing(HDG)process,surface morphology was observed by OM and SEM with different work roll process,its Wsa with different annealing temperature and different work roll process were tested.The results show that the annealing temp.have no effect on the surface morphology,work roll roughness have effect on the surface morphology.When the annealing temperature increases,the grain size becomes big.Decrease the annealing temperature above the recrystal temperature,it can avoid the grain to grow up for recrystal grain,and the grain size is small and uniform.When the annealing temperature.is 820℃,work roll roughness is 1.6μm,Wsa value is morebetter.