摘要
利用金相显微镜、扫描电镜、能谱仪等相关试验手段,研究了钢板边裂缺陷原因,结果表明:引起钢板边裂的原因基本分为四种:夹杂物引起的边裂,钢板边部脱碳严重引起的边裂,横向冷却不均匀引起的边裂和聚集的气泡引起的边裂。针对相关原因通过采取优化炼钢工艺、连铸工艺、加热炉加热工艺以及轧制段横向冷却工艺等措施,板坯边裂缺陷率由原来的30%,降至5.1%,减少了切边量。对实际生产及质量异议钢板处理具有一定指导意义。
In order to study the surface quality of the edge-cracking steel sheet and find out the root causes of defects, microscope, scanning electron microscopy, energy dispersive spectroscopy and other related test equipments were employed. The results showed that there were four fundamental casues of steel edge cracking： inclusions, severe decarburization at the steel edge, uneven cooling along transverse direction and accumulation of blowholes. In response to the above-mentioned causes, improvement measures such as optimization of steelmaking process, continuous casting, heating scheme and transverse cooling process at roiling section were taken to decrease the slab defect rate due to edge cracking from 30% to 5.1%, resulting in reduction of side trimming. The results provide helpful reference to production practice and quality disputes resolution.
出处
《钢铁钒钛》
CAS
北大核心
2012年第2期87-92,共6页
Iron Steel Vanadium Titanium
基金
河北省自然科学基金项目(E2009000791)
关键词
钢板
边裂
夹杂物
脱碳
横向冷却
气泡
steel plate
edge cracking
inclusion
decarburization
transverse cooling
blowhole
