Tensile strength and mechanical properties of heat resistant castings

- Nov 21, 2018-

In the process of operation, the heat-resistant castings have excellent casting property and can be made into complex parts. Generally, they have good machining property, good abrasion resistance, shock absorbency and low price.Industrial cast iron generally contains 2% ~ 4% carbon.Carbon exists mostly in graphite and sometimes in cementite form in cast iron.In addition to carbon, cast iron also contains 1% ~ 3% silicon, and manganese, phosphorus, sulfur and other elements.Alloy cast iron also contains nickel, chromium, molybdenum, aluminum, copper, boron, vanadium and other elements.

The mechanical properties of heat-resistant castings are related to the microstructure of the matrix and the morphology of graphite.The tensile strength, plasticity and toughness of gray cast iron are much lower than that of steel, but the compressive strength is equal to that of steel. Meanwhile, the matrix structure also has a certain impact on the mechanical properties of gray cast iron.The graphite flake of pearlitic matrix grey cast iron is small and has high strength and hardness.

The graphite sheet of ferritic - pearlitic matrix grey cast iron is slightly larger than that of pearlite - pearlitic grey cast iron.Therefore, the most widely used industry is the pearlitic matrix of gray cast iron.Carbon exists mostly in graphite and sometimes in cementite form in cast iron.In addition to carbon, cast iron also contains 1% ~ 3% silicon, and 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 affecting microstructure and properties of cast iron.http://www.wuxiorient.com/