Cast iron
From Wikipedia, a free encyclopedia written in simple English for easy reading.
 |
Someone thinks that this page or section does not use Simple English.
This does not mean it is bad. It may only be difficult for some users to understand. Editors can help Wikipedia by making the page or section simpler. For tips on making it better, read "How to write Simple English articles". |
White cast iron has a characteristic white, Crystalline fracture surface. Large amounts of Fe2C are formed during casting giving hard brittle material. It is formed by rapid cooling and has good wear resistance. It is used as railway brake shoes.
Gray cast iron has a grey fracture surface with afinely faceted structure. A significant silicon content (2 to 3wt %) promotes graphite (carbon) precipitation rather than cementite Fe3C. The sharp pointed graphiteflakes contributesbrittleness in greyiron. The dispersion of graphiteflakes accounts for 2 attractive properties. Grey cast iron has the largest tonnage amongst cast irons.
