![]() ![]() In malleable cast irons, graphite exists in the form of rosettes or temper carbon. As a result, the graphite phase cannot always be retained or polished well. Therefore, there is always a possibility that the graphite cannot be completely retained, especially very large flakes or agglomerations of flakes. ![]() This means that a certain percentage of graphite is cut very shallow during grinding and polishing, with only a weak hold in the matrix. However, it is actually three-dimensional. ![]() In the microscope, the image of the graphite is seen two-dimensionally. 5: Grey iron with flake graphite, showing correct polish (Mag: 200x) 4: Grey iron with flake graphite, insufficient polish (Mag: 200x)įig. The main challenge when preparing samples of cast iron is to retain the graphite in its original shape and size to ensure a correct representation of the cast iron’s microstructures.įig. 500x, DIC)ĭifficulties in the metallographic preparation of cast iron 1: Austempered ductile iron, Beraha color etch (Mag. In addition, specific cast irons are the material of choice for sea water pump housings, rolling mill rollers and parts for earth moving equipment.įig. Because of its economic advantages, cast iron is used for many applications in the automotive, manufacturing and processing of metals industries. In grey irons, the carbon is present as graphite in white cast iron it is present in the form of iron carbide and alloy carbides.Ĭast iron has good castability and machinability, as well as moderate mechanical properties. The term cast iron refers to iron-carbon-silicon alloys that contain 2.5-4 % carbon and usually 1-3 % silicon. When alloyed with carbon and other elements, iron offers an enormous variety. Iron is one of the most diverse metals, and it has been an important construction material for centuries, used in many buildings from train stations and market halls to offices and homes. Solving materialography's biggest challenges ![]() How Automation drives Value for Materialography Grinding stones and diamond grinding discsģ ways to improve your process when cutting large piecesĦ ways to improve the speed and efficiency of your cuttingħ ways to optimize cutting liquid for optimal sectioning ![]()
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