A casting method of complex structure thin-wall ductile iron ship turbocharger casting
A turbocharger and complex structure technology, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of difficult selection of parting surfaces, inability to subsidize processing volume, and inability to mass produce, etc., to achieve a solution Shrinkage of the bottom flange is beneficial to the self-feeding ability and the effect of improving the pass rate of castings
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Embodiment 1
[0013] Embodiment 1: A casting method of a thin-walled ductile iron marine turbocharger casting with a complex structure. The casting method includes mold making, molding, core making, box closing, pouring and sand cleaning in sequence. It is characterized in that: in the above pouring process The gating system is composed of a gas outlet riser, a cold iron, a hot riser on the bottom flange, and a feeding riser on the side of the bottom flange, and a filter screen is set on the gating system.
[0014] The sprue ratio of the above-mentioned gating system is the cross-sectional area of the sprue: the cross-sectional area of the runner: the sum of the cross-sectional area of the inner runner: the cross-sectional area of the hot riser mouth = 1: 1.8: 0.7: 3.
[0015] The above pouring temperature is 1370-1385°C, the flow cannot be interrupted during the pouring process, the supercooling degree of the material is <5, and the CE value of the material is 4.4-4.6%.
Embodiment 2
[0016] Embodiment 2: A casting method of a thin-walled ductile iron marine turbocharger casting with a complex structure. The casting method is followed by mold making, molding, core making, box closing, pouring and sand cleaning. It is characterized in that: in the above pouring process The gating system is composed of a gas outlet riser, a cold iron, a hot riser on the bottom flange, and a feeding riser on the side of the bottom flange, and a filter screen is set on the gating system.
[0017] The sprue ratio of the above-mentioned gating system is the cross-sectional area of the sprue: the cross-sectional area of the runner: the sum of the cross-sectional area of the inner runner: the cross-sectional area of the hot riser mouth = 1: 2.2: 0.9: 4.
[0018] The above pouring temperature is 1370-1385°C, the flow cannot be interrupted during the pouring process, the supercooling degree of the material is <5, and the CE value of the material is 4.4-4.6%.
Embodiment 3
[0019] Embodiment 3: A casting method of a thin-walled ductile iron marine turbocharger casting with a complex structure. The casting method includes mold making, molding, core making, box closing, pouring and sand cleaning in sequence. It is characterized in that: in the above pouring process The gating system is composed of a gas outlet riser, a cold iron, a hot riser on the bottom flange, and a feeding riser on the side of the bottom flange, and a filter screen is set on the gating system.
[0020] The sprue ratio of the above-mentioned gating system is the cross-sectional area of the sprue: the cross-sectional area of the runner: the sum of the cross-sectional area of the inner runner: the cross-sectional area of the hot riser mouth = 1: 2: 0.8: 3.5.
[0021] The above pouring temperature is 1370-1385°C, the flow cannot be interrupted during the pouring process, the supercooling degree of the material is <5, and the CE value of the material is 4.4-4.6%.
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