Abstract

1. No direct relationship was found between the hardness and the wear resistance of white cast irons. 2. The wear resistance of cast iron increases with the hardness of the carbides. 3. The wear resistance of hypoeutectic chromium cast irons increases linearly with the quantity of carbides if the type of carbide does not change. An increase of the carbon concentration above the eutectic does not increase the wear resistance, since large brittle needles of hypereutectic carbides are formed. 4. The wear resistance decreases with increasing sizes of the carbides. 5. The wear resistance of white cast irons increases linearly with the hardness of the metallic base. The wear resistance is highest when the metallic base is martensitic. In some cases metastable austenite provides an equal wear resistance. Stable austenite reduces the wear resistance.

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