What is the maximum working temperature the cast iron can withstand?
White cast iron. The content of carbon and silicon is low, carbon mainly exists in cementite form, and the fracture is silvery white. It is easy to produce shrinkage and crack when it is solidified. High hardness, brittleness, and can not withstand impact load. Number of blanks used as malleable iron and production of wear-resistant parts.
Grey cast iron. The higher carbon content (2.7% ~ 4%), carbon exists mainly flake graphite morphology, the fracture was grey, referred to as gray iron. The melting point is low (1145~1250 DEG C), the shrinkage is small, the compressive strength and hardness are close to carbon steel, and the damping property is good. Because the flake graphite exists, the abrasion resistance is good. The casting performance and cutting process are better. Used for manufacturing machine tool bed, cylinder, box and other structural parts. Its brand is "HT", followed by two sets of figures. For example: HT20-40 (the first number indicates the minimum tensile strength, and the second group numbers indicate the minimum flexural strength).
Cast iron:A general term for an alloy consisting mainly of iron, carbon, and silicon. In these alloys, the carbon content exceeds the amount retained in the austenite solid solution at the eutectic temperature.An iron carbon alloy containing more than 2% carbon. Industrial cast iron generally contains carbon from 2.5% to 3.5%. Carbon is often found in graphite form in cast iron and sometimes in cementite form. In addition to carbon, the cast iron also contains 1% to 3% silicon, as well as manganese, phosphorus, sulfur and other elements. Alloy cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements. Carbon and silicon are the main elements that affect the microstructure and properties of cast iron
Malleable iron。 Obtained by annealing treatment of white cast iron, the graphite is a group of flocculent distribution, referred to as ductile iron. Its properties are uniform, wear resistance, good plasticity and toughness. Used to produce parts of complex shape and capable of withstanding strong dynamic loads.
