Cast steel is a general term for iron-based alloys used to produce castings that do not undergo eutectic transformation during solidification. A type of cast alloy. The main alloying elements of cast steel are iron and carbon as the main elements, and the carbon content is 0-2%. Cast steel is further divided into three categories: cast carbon steel, cast low alloy steel and cast special steel.
1. Cast carbon steel. Cast steel with carbon as the main alloying element and small amounts of other elements. Casting low carbon steel with carbon content less than 0.2%, casting medium carbon steel with carbon content of 0.2% to 0.5%, and casting high carbon steel with carbon content greater than 0.5%. With the increase of carbon content, the strength and hardness of cast carbon steel increase. Cast carbon steel has high strength, plasticity and toughness, and low cost. It is used in heavy machinery to manufacture parts that bear heavy loads, such as rolling mill stands, hydraulic press bases, etc. Parts that are also impacted such as bolsters, side frames, wheels and couplers.
2. Cast low alloy steel. Cast steel containing alloying elements such as manganese, chromium, and copper. The total amount of alloying elements is generally less than 5%, which has greater impact toughness and better mechanical properties through heat treatment. Casting low alloy steel has better performance than carbon steel, which can reduce the quality of parts and improve the service life.
3. Cast special steel. Alloy cast steel made to meet special needs has a wide variety, usually containing one or more high-alloying elements to obtain certain special properties. For example, high manganese steel containing 11% to 14% manganese is resistant to impact wear and is mostly used for wear-resistant parts of mining machinery and construction machinery; various stainless steels with chromium or chromium-nickel as the main alloying elements are used in corrosion or 650 Parts that work under high temperature conditions above ℃, such as chemical valve bodies, pumps, containers or steam turbine casings of large-capacity power plants.
