The centrifugally cast bimetallic ring blank is the key to ensure the stability and final performance of the bimetallic ring during hot rolling.In this paper,Flow-3D software is used to simulate the influence of parameters such as pouring point position,mold rotation speed and outer layer initial temperature on the centrifugal casting process of 40Cr/Q345B bimetallic ring billet and the interface bonding,and verified by experiments.The results show that the pouring point is located in the center,which helps to speed up the patterning speed,reduce the temperature difference between the two ends of the casting,and make the wall thickness uniform.Within the feasible range,increasing the rotational speed helps to improve the eccentricity.The optimal process parameters are the outer layer pouring temperature of 1560 ℃,the gate L of 0.4,the casting speed of 800 r/min,and the inner layer metal with the pouring temperature of 1580 ℃ when the outer layer gold temperature is cooled to 1350 ℃.Through simulation and experimental verification,a 40Cr/Q345B bimetallic ring blank with good metallurgical bonding and qualified inner and outer layers of metal is obtained,which can provide a blank that meets the requirements for subsequent hot rolling.
centrifugal castingbimetallic ring blanknumerical simulation
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