一、热坯表面缺陷检测技术的发展背景国外钢铁工业界,从省资源、节能、高效率等观点出发,大力推进钢铁生产的直接化与连续化。较突出的新工艺有:连铸连轧(CC～DR)及连铸热装工艺(CC—CR)。但这些重大节能工艺的实现,存在着一些技术障碍。关键之点为无缺陷铸坯技术、高温 First, the development of hot metal surface defect detection technology Background Foreign steel industry, from the provincial resources, energy saving, high efficiency point of view, vigorously promote the steel production of direct and continuous. More prominent new technology are: continuous casting and rolling (CC ~ DR) and continuous casting hot charging process (CC-CR). However, these major energy-saving technologies to achieve, there are some technical obstacles. The key point for defect-free casting technology, high temperature