一、前言液相穴的形状和深度是确定最佳工艺参数的重要根据。过去,测定它的方法有钢液排出法、示踪元素法等,昂贵繁琐;快速打钉法虽比上述方法简便,但需要多次测定并选择合适的钉头材料,故此给连铸工艺研究工作带来许多不便。由于发现了铸态组织中微孔隙率对凝固过程的指示作用,使我们具有一个既简 First, the preface The shape and depth of the liquid phase hole is to determine the best basis for the process parameters. In the past, the determination of its method of liquid discharge method, tracer element method, expensive and cumbersome; quick nailing method than the above method is simple, but need to determine and select a suitable number of nail head material, so to the continuous casting process Work brings a lot of inconvenience. Due to the discovery of the micro porosity in the as-cast microstructure indicative of the solidification process, we have a simplified