Steel is iron, carbon, as the main element of the alloy, the carbon content of 0-2%. The cast is divided into cast carbon steel,
(1) Cast Carbon Steel. Carbon as the main alloying element and containing a small amount of other elements of the . Carbon less than 0.2% for the casting of low carbon steel, carbon 0.2% to 0.5% for the casting of carbon steel, carbon-containing greater than 0.5% for casting high-carbon steel. With the increase of the carbon content, the strength of the casting of carbon steel is increased, hardness is increased. Cast carbon steel has high strength, ductility and toughness, low cost, heavy machinery used in the manufacture of withstanding a big load of parts, such as rack of the rolling mill, hydraulic press base; force used in the manufacture of railway vehicles parts and withstand shocks such as Bolster, side frames, wheels and coupler.
(2) casting. Containing the alloying elements such as manganese, chromium, copper and cast. Usually less than 5% of the total amount of alloying elements, has a larger impact toughness, and through a heat treatment to obtain a better mechanical performance. Than carbon steel, low alloy steel casting has the better the performance, part quality can be reduced to improve the service life.
③ casting special steel. In order to meet the special needs refining alloy steel, variety, usually containing one or more of the high amount of the alloy elements, in order to obtain particular properties. For example, the impact of high-manganese steel capability of 11% to 14% manganese wear, used for mining machinery, engineering machinery wear parts; as the main alloying elements chromium or chromium nickelfor corrosion or 650 working parts ℃ temperature above conditions, such as the chemical industry with the valve, pump, container or large-capacity power station turbine casing.