Patent ID: 8096346

Claim:
A method for casting a high-power wind turbine base comprising: using a furan resin sand mold without shrinkage holes and chill casting technique for casting, a casting mold is made by furan resin sand, has stepped pipe vertical and bent pouring paths to reduce turbulent flow of molten iron, a parting face of the mold is perpendicular to a ground along a length of the wind turbine base, the casting mold also has a filtering system for flow of molten iron; making the casting mold, using the furan resin sand as molding sand to make the casting mold, a furan resin sand filling time is controlled to be within 30 minutes, an allowed using time for the furan resin sand is controlled within 30-40 minutes, then the casting mold undergoes microseismic compaction, the parting face of the sand mold is perpendicular to the ground; spherical graphite cast iron that bears low-temperature conditions is used for the turbine base; the spherical graphite cast iron is made with standard ingredients, then is post inoculated by adding nodularizer and nucleating agent, after nodularization, at 1300-1380° C. the liquid mixture is poured into the casting mold, a pouring rate is controlled to be between 0.3-0.8 m/s, a pouring quantity is between 20-60 kg/s; during the pouring a filtering system is used for the flow of molten iron to enhance the purity of the molten iron; weight is used for preventing the casting mold to be raised when the iron is expanded during graphitization and reducing disperse shrinkage; thereafter, a casted turbine base is slowly cooled down in the mold to below 400° C., then take out the casted turbine base out of the mold.