Effect of Cooling Rate on Solidification Microstructure and Element Segregation of ZG40CrNi2Mo Large Castings
In order to study the effect of different cooling rates on solidification structure and element segregation during casting solidification,the solidification simulation experiments of ZG40CrNi2Mo high-quality quenched and tempered steel under different cooling rates were carried out by using the numerical simulation method of casting solidification process and the self-developed high flux solidification process thermal simulation test device.The results show that the relationship between secondary dendrite arm spacing and local solidification time of ZG40CrNi2Mo quenched and tempered steel is consistent with λ2=36.03 t0.26.With the decrease of cooling rate,Cr segregation shows an upward trend,and Ni segregation first increases and then decreases;Mo element segregation is the most serious,but it is insensitive to the change of cooling rate.
thermal simulationnumerical simulationcooling ratesolidification structuresecondary dendrite arm spacingelement segregation
NETL
NSTL
万方数据
