INFLUENCE OF MOULD ROTATION ON MACROSEGREGATION IN INGOT

摘要

The macrosegregation formation in an ingot and the influence of rotating mould upon it wereanalysed on the basis of interdendritic flow.When the ingot mould rotates unidirectionally,thecentrifugal volume force acts on all inner parts,and when the ingot mould rotates alternately,the tangential alternate force is also formed,and both have various influences on the differentmodes of interdendritic flow.It is shown that as the ingot mould rotates unidirectionally oralternately with a moderate angular speed,the interdendritic unstable flow may be controlledeffectively and the formation of segregation may be restrained.Thus,it seems to be significantfor reducing the segregation such as A-type etc.,in the steel ingot.