摘要
通过SEM和热轧实验研究了高强船板花斑缺陷的形成机理及影响因素。结果表明:花斑由抛丸后残留的氧化铁皮构成。氧化铁皮与基体接触的界面凸凹不平、氧化铁皮厚度不均匀是形成花斑的主要原因。降低钢中Si和Mn的含量可减少加热过程中硅橄榄石和锰橄榄石的形成,增加钢板的可除鳞性,减少钢板表面氧化铁皮残留。提高轧制温度和终冷温度可有效减小氧化铁皮与基体界面接触长度。采用ACC(层流冷却)冷却方式,抛丸效果较好。
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.
出处
《热加工工艺》
CSCD
北大核心
2015年第9期103-105,108,共4页
Hot Working Technology
基金
国家自然科学基金青年基金项目(51301111)
辽宁省教育厅一般项目(L2012428)
关键词
高强船板
花斑缺陷
终冷温度
界面长度
high strength ship plate
granophyric defect
final cooling temperature
interface length
