ProCAST software was adopted to simulate the casting solidification process of the vulnerable caterpillar board.The effect of pouring temperature on casting defects and pouring rate and pouring temperature on the valid stress of the casting were analyzed

and the experimental verification was carried out.The results demonstrate that the shrinkage cavity and porosity defects in the caterpillar board are obviously reduced when the pouring temperature is 1 610℃.The valid stress of the casting is hardly affected by the pouring rate

which can be significantly reduced by appropriately reducing the pouring temperature

thus resulting in good quality of castings.