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What is the difference between cast steel and forging steel?

by:BoQiao Machinery     2020-12-19
Correct the first, the steel is forged steel, ha ha ~ ~ cast steel is used to pouring casting of steel. Cast steel can be divided into cast carbon steel, cast low alloy steel and special steel casting 3 classes. Carbon as the main alloying element and cast steel containing small amounts of other elements. Casting of the carbon steel has high strength, plasticity and toughness, low cost, in the heavy machinery used in the manufacture of high load of parts, such as rolling mill frame and press the base; On the railway vehicle parts used in the manufacture of force big and withstand shock bolsters and side frames, such as wheels and coupling, etc. Carbon steel casting in general, high melting point, low carbon steel ZG15 casting performance is poor, only used in the manufacture of machine parts or carburized parts; Medium carbon steel ZG25 ~ ZG45, is higher than that of the comprehensive performance of various types of cast iron, namely, high strength, good plasticity and toughness, therefore is suitable for manufacturing complex shape, high strength and toughness requirement of parts, such as the train wheels, forging hammer frame and the anvil block, roll and high pressure valves, etc. , is the most used carbon cast steel category; The low melting point of high carbon steel ZG55, its casting properties of a medium carbon steel is good, but its low plasticity and toughness, used to make a few wear parts. Such as ZG40Mn, ZG30MnSi1, ZG30Cr1MnSi1, etc. To prevent steel misrun and cold shut, shrinkage cavity and shrinkage, cracks and defects such as adhering sand, more complicated than the cast iron craft measures must be taken: 1, due to poor liquidity of liquid steel, to prevent steel cold insulation and misrun, steel wall thickness not less than 8 mm; Gating system to simple structure, and section size is bigger than cast iron; Use dry mold or hot mould; Properly increasing pouring temperature, average of 1520 & deg; ~ 1600 ℃, because of the high pouring temperature, liquid steel superheat, keep long liquid, liquid can be improved.
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