Solidification structure numerical simulation of 42CrMoA billet
In order to improve the internal quality of 42CrMoA steel in a factory and reduce the casting of billet cen-ter segregation,the ProCAST software was used to simulate the casting of billet solidification structure,and the effect of continuous casting parameters on the distribution of solidification organization,the rate of equiaxial crystal and equiaxial crystalline area density was studied.When the casting speed was increased from 0.8 to 1.1 m/min,the pro-portion of equiaxial crystal zone has increased by 5.26％;When the cooling water flows increases from 0.144 to 0.192 L/kg,the proportion of equiaxial crystal zone has decreases by 3.34％;The superheat increases from 5 to 35 ℃,and the proportion of isometric crystal zone decreases by 7.98％.It is concluded that it is possible to reduce the macroscopic segregation of 42CrMoA steel by appropriately increasing the casting speed,decreasing the amount of water in the second cooling ratio and reducing the superheat of the steel.
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