Forming of Positive Macrosegregations during Steel Ingot Solidification

Zarko Radovié, Milisav Lalovié, Milivoje Tripkovié, Branislav Jakié
1999 ISIJ International  
It is known that the degree of positive segregations in upper part of ingots is very sensitiveiy dependent upon the enriched liquid velocity. In this paper, relationship between chemical composition of steel and liquid density changesare considered,Besides, the influence of the primary and secondary arm spacing (A1, ),2) on the liquid f[ow velocity, i,e, intensity of positive macrosegregations, was studied, using examples from 3-tone ingots, for different grades of steel. The elements as W, Ni.
more » ... elements as W, Ni. Mo, Cr, decreases the effect of density changes (dpLldfL), i.e. they have smaller tendency to segregation forming. Global intensity of positive macrosegregations, S~, which can be calculated by integration of local macrosegregations degree, depends approximately linearly on the liquid flow velocity.
doi:10.2355/isijinternational.39.329 fatcat:bg4rid5i2ngjjdjcobvnnphpfu