摘要
回顾了板坯横向凹陷与纵向凹陷形成的主要原因。首先,讨论了影响板坯横向凹陷产生的因素,如热流密度和坯壳强度等。接着,发现纵向凹陷主要分为中心纵向凹陷与偏角部纵向凹陷,总结了纵向凹陷产生的主要因素,如结晶器内流动行为、结晶器锥度、拉速、过热度、冷却与保护渣等。最后,结合现场生产实绩,归纳提出了解决铸坯凹陷的一系列有效措施,从而提高板坯表面质量。
Main causes for longitudinal depression and transverse depression have been summarized. Firstly,the influential factors on transverse depression were illustrated,including heat fluxes and shell strength. Then,the longitudinal depression which can be divided into central depression and off-corner depression,and the main causes of longitudinal depression were also put forward,such as turbulent flow in mold,mold taper,casting speed,superheat,cooling process,together with mold powder. Finally,the surface quality of strand can be improved significantly based on a series of optimization of process measures on depressions in continuous casting.
出处
《宝钢技术》
CAS
2017年第6期53-59,共7页
Baosteel Technology
关键词
横向凹陷
纵向凹陷
偏角部凹陷
连铸
transverse depression
longitudinal depression
off-corner surface depression
continuous casting
