The structure and technical requirements of gas turbine intake cylinder castings with inlay cast ribs were introduced.In view of the unstable quality of intake cylinder castings in casting production,the causes of defects such as sand and slag holes,cold isolation and poor fusion at the root of the castings were analyzed.By changing the pouring system to a fully open type,the flow rate of the inner runner was reduced,so that sand inclusion defects were effectively controlled,the molten iron was ensured to be filled smoothly by adding a molten iron flow channel,and the appearance quality of the casting was improved.by using auxiliary runner,the inner runner was set as close as possible to the inlaid casting.The fusion quality of the connecting parts of the inlaid casting was improved.And it reduced the cold isolation and poor fusion defects at the root of the inlaid casting.
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