TY - JOUR N2 - In order to predict the distribution of shrinkage porosity in steel ingot efficiently and accurately, a criterion R√L and a method to obtain its threshold value were proposed. The criterion R√L was derived based on the solidification characteristics of steel ingot and pressure gradient in the mushy zone, in which the physical properties, the thermal parameters, the structure of the mushy zone and the secondary dendrite arm spacing were all taken into consideration. The threshold value of the criterion R√L was obtained with combination of numerical simulation of ingot solidification and total solidification shrinkage rate. Prediction of the shrinkage porosity in a 5.5 ton ingot of 2Cr13 steel with criterion R√L>0.21 m・℃1/2・s -3/2 agreed well with the results of experimental sectioning. Based on this criterion, optimization of the ingot was carried out by decreasing the height-to-diameter ratio and increasing the taper, which successfully eliminated the centreline porosity and further proved the applicability of this criterion. L1 - http://www.journals.pan.pl/Content/89150/PDF/afe-2016-0021.pdf L2 - http://www.journals.pan.pl/Content/89150 PY - 2016 IS - No 2 DO - 10.1515/afe-2016-0021 KW - Application of information technology to the foundry industry KW - Quality management KW - Shrinkage porosity KW - Ingot solidification KW - Numerical simulation A1 - Zhang, C. A1 - Zhang, L. A1 - Bao, Y. A1 - Wang, M. PB - The Katowice Branch of the Polish Academy of Sciences DA - 2016 T1 - Shrinkage Porosity Criterion and Its Application to A 5.5 Ton Steel Ingot UR - http://www.journals.pan.pl/dlibra/publication/edition/89150 T2 - Archives of Foundry Engineering ER -