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ABSTRACT
This article meticulously outlines the varieties of cast iron, their manufacturing processes, micrographic structures, and applications. White cast irons, achieved through rapid cooling and specific manganese and silicon content, are characterized by high hardness, used in wear-resistant applications after thermal stabilization. Gray cast irons, with carbon in the form of graphite, have complex structures and diverse applications, notably in mechanical construction and chemical engineering. Malleable cast irons, enhanced through specific heat treatments, are designed to optimize their malleability. The manufacturing process of spheroidal graphite (SG) cast irons is also explained, highlighting the influence of alloying elements and heat treatments on the mechanical properties and matrix structures, facilitating a wide range of industrial applications. The document also details heat treatments like stabilization, ferritisation, graphitisation, and quenching, altering the mechanical properties of cast irons for specific applications.
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Thibault FOURCADE: Engineer - This article is the updated version of article [TBA1064] entitled "Fonts", written and published in 2004.
INTRODUCTION
Cast irons, iron-carbon alloys, are characterized by their micrographic structures and mechanical properties, suitable for a multitude of industrial applications. The different varieties of cast iron, obtained by specific manufacturing processes and heat treatments, offer extensive application possibilities. This study explores the characteristics, manufacture and applications of white, grey and malleable cast irons, as well as spheroidal graphite cast irons (GS), with particular emphasis on heat treatments that modify their mechanical properties for targeted uses.
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KEYWORDS
heat treatments | malleable cast irons | spheroidal graphite
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Bibliography
Standards and norms
- Industrial thermal insulation materials – Factory-made roll and sheet products – Specifications - NF EN 12513 - 2011
- Cast iron – Grey cast iron. - NF EN 1561 - 2011
- Heat treatment of cast iron – Terms and definitions. - NF EN ISO 4885 - 2018
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