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- W2350582246 abstract "The cylinder of gas turbine of 12 000 kW D56 type electromechanism can be divided into the upper and lower half,which is machined by matching method.The weight of the upper half and the lower half are 5.7 t and 10.5 t respectively.The material of the casting is HT250.The profile dimension is 2 800 mm×2 200 mm×2 500 mm.The structure and shape of internal cavity is very complex.The main wall thickness is 30 mm,and the largest wall thickness is 140 mm.The mold is made of resin binder sand.Based on the proportional solidification technique,the first enlarged second unchoked bottom gating system of casting was designed and the ear riser was designed using the large orifice discharge theory.The gating ratio is A_(sprue)∶A_(runner)∶A_(inner)=1.2∶1.4∶1,and the diameter of the four ear riser is 180 mm,the size of the riser neck is 30 mm×180 mm.Through using the chill and the feeding riser and other measures,the temperature field with the high temperature on the upper part and low temperature on the lower part are formed,which is beneficial to feed the casting,thus the shrinkage and porosity cavity,slag and sand-inclusions on the top of the fat flange can be eliminated.Total 20 castings were produced in the first batch,such as shrinkage and porosity cavity 、blowholes and slag inclusions were not found after inspection." @default.
- W2350582246 created "2016-06-24" @default.
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- W2350582246 date "2006-01-01" @default.
- W2350582246 modified "2023-09-24" @default.
- W2350582246 title "Solving the Defects of the Cylinder of 12 000 kW D56 Type Gas Turbine Castings by the Proportional Solidification Technique" @default.
- W2350582246 hasPublicationYear "2006" @default.
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