Carbide Eutectic
Carbide eutectic is a fine mixture of carbides and a solid solution that forms during solidification of carbon-rich alloys. It increases the wear resistance of hard cast alloys.
Physicochemical Mechanism of Action
Carbide eutectic forms through the reaction of carbon and iron during melting and cooling. It consists of fine particles of carbides dissolved in a solid solution.
Metallurgical Relevance & Welding Risks
Carbide eutectic contributes to wear resistance by making the material harder. However, too much carbide eutectic can lead to increased hardness and lower formability, causing difficulties in machining and welding.
Workshop Practice & Action Guidelines
To obtain optimal properties of hard cast alloys, it is important to precisely control carbon content and cooling conditions. If carbon content is too high, too much carbide eutectic can form, increasing hardness and reducing formability. When welding, careful pre-treatment is required to avoid porosity and maintain wear resistance.