For casting steel. A kind of casting alloy. Cast steel for casting of carbon steel,casting and casting special steel 3 class.
①cast carbon steel.
Carbon as main alloy element and containing a small amount of other elements of the. Carbon containing less than 0.2% for casting low carbon steel, carbon containing 0.2%～ 0.5% for casting of carbon steel, carbon containing greater than 0.5% for casting high carbon steel. With the increase of carbon content, carbon increases in strength, hardness. Cast carbon steel has high strength, ductility and toughness, low cost, in the heavy machinery used in the manufacture of heavy-duty parts, such as rolling machine, hydraulic machine base; in railway vehicles used in the manufacture of force and bear the brunt of the parts such as bolster, side frame, wheels and coupler.
Containing manganese, chromium, copper, alloy cast steel. Alloy element aggregates is generally less than 5%, with a larger impact toughness, and through the heat treatment to obtain the better mechanical properties. Low alloy steel casting than carbon steel has better performance, can reduce the parts quality, improve service life.
The casting special steel.
In order to meet the special needs and refining alloy cast steel, a wide variety, usually containing one or more of the high amount of alloy elements, to obtain some special properties. For example, manganese 11% ~ 14% of thecan impact wear, much used in mining machinery, engineering machinery wear parts; with a chromium or chromium nickel as main alloy element in all kinds of , used in corrosive or high temperature above 650 ℃work under the conditions of the parts, such as chemical valve, pump, a container or large capacity power station steam turbine shell etc.. Cast steel 1 casting surface and the near surface defect detection