Alloy cast iron castings used

2.11 ~ 6.69% carbon content of iron-carbon alloy steel: high carbon steel> 0.69% 0.25 to 0.69% in low-carbon steel <0.25%
Cast iron Category:
1, by C in the presence of cast iron in different forms, can be divided into three categories:
1) Cast Iron: C all in the form of Fe3C, cross-section silver, hard, brittle, hard machining, rarely used to make parts for non-impact conditions, such as roller main purposes: steel-making raw materials can be processed into malleable cast iron.
 2) gray cast iron: C trace elements soluble iron in vitro, all or most of the form of graphite, gray fracture, the most widely used.
3) Ma cast iron: graphite, ledeburite. Are white iron and gray iron transition between the organizations, black and white fracture, pitting. Hard, brittle, difficult to process
2, according to the different forms of graphite, gray iron is divided into:
1) The ordinary gray cast iron: Graphite flakes
2) malleable iron: group flocculent
3) Ductile Iron: spherical
4) CGI: worm-like