| 摘要 |
The present invention relates to a method for predicting surface defects of a slab, the method comprising: a step of obtaining the poise of mold powder injected onto the upper end of molten steel to lubricate a mold and a solidifying cell during continuous casting and the casting speed (m/min) of the continuous casting; a step of calculating an index of generated pinholes by using the poise of the mold powder and the casting speed (m/min); a step of calculating the generation ratio of the pinholes to a slab; and a step of determining the quality of the casted slab by comparing the generation ratio of the pinholes with a reference value. Equation, wherein Pph is the generation ratio of pinholes (%); A, B and C are constants between Pph and Ipv; A may be a value between 0.10-0.12; B may be a value between 0.95-0.97; and C may be a value between 2.10-2.14. [Reference numerals] (AA) Start; (BB) End; (S10) Obtain the poise of mold powder and the casting speed (m/min); (S20) Calculate an index of generated pinholes (Ipv); (S36) Calculate the generation rate of pinholes (Pph); (S40) Determine the quality of a slab in advance |
