It is difficult to produce cast-steel joint due to its complex structure and strict material requirements.There exist problems in difficult control to making precision of wood pattern and high cost as well as low product efficiency in conventional sand mold casting.Composite LFC-sand casting method was presented as follows:firstly

foam pattern was substituted for part of wood pattern

then it was broken after molding

and then sand core was set in cavity to pouring.Meanwhile

solidification process was simulated by the Huazhu CAE to optimize gating system design.The results show that foam pattern can improve degree of free and accuracy of cast-steel joint and effectively reduce cost as well as shortening time

meanwhile

cavity sand casting can ensure casting materials

integrating the advantages of two casting process.Optimization of gating system by the Huazhu CAE can decrease the waste of joint.