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Cast iron

Gray cast iron Generally means cast iron, but he identifies a group Of iron alloys that solidify with Eutectic.

Overview General:
Iron accounts for more than 95% material Alloy, while the main Alloying elements are carbon Silicon. Amount of carbon cast iron is 2.1-4%, while Iron alloys with less carbon are called carbon steel By definition. Cast iron has a considerable amount of silicon Typically 1.3%. Therefore, these alloys should be considered here triple-C-alloys Si.

However, the principles of cast iron solidification They understood from the diagram of iron carbon binary phase, Eutectic point which lies at 1154 ° C and 4.3% carbon WT. Because It has cast iron composition, melting temperature Of 1150-1200 ° C is about 300 degrees less than a melting point of iron Pure. Cast iron tends to be fragile, although there may Special alloy suggest the opposite. Fracture surface color May be used to identify an alloy; infections Carbide allow cracks to pass straight as a result Some "white" on the surface, while the graphics chip Deflect a passing crack and initiate new cracks as countless Material breaks, leading to a rough surface that looked gray With low melting point, good liquidity, Castability, Excellent Machinability Wear resistance increases, cast irons have become material Engineering with a wide range of uses such as pipes, Machines auto parts.

Products:
Cast iron Produced by Remelting cast iron, usually with quantities Large iron and steel scrap and initiating steps To remove unwanted contaminants such as phosphorus and sulfur. Depending on carbon to silicon content are reduced Required levels could be anywhere from 2% to 3.5% and 1% -3%, respectively. Other elements are added so do Melt before the final form was made by casting.

Iron is melted in the oven for a small explosion Dome. After melting it over the melted iron is Forehearth poured from the blast furnace. This system developed Innovative ideas by the Chinese revolution which brought Field of metallurgy. Before that iron was melting furnace Air, which is a type of oven Reverberatory.

Several advantages Cast-iron engineering uses:

A) family Of metals have a capacity of being used for engineering needs Production.
B) You can have this wide range of Physical and mechanical properties.
C) a good power weight ratio.
D) generally cheaper than other competing metals Low financial cost per unit of power compared to metals Other.
E) Sir density and high temperature superconductivity So steel strength levels similar hoax.
F) easily Mechniable, allows higher speeds and feeds less Free energy due to the presence of graphite.
M) Many iron castings may be used without Heat treatment (as cast), but when required can be Increase heat to treat the total assets or property As local surface hardness.
) That could very well Particularly the decline of gray irons.
I) Chemical Analysis May be changed to give enhanced special features Like resistance to corrosion, oxidation and wear resistance.
J) changes rapidly from planning to finished goods.
K) match that consists of different sizes made up to 100 tons.
L) of Flexible Printing ability to improve the look and appeal Sales.
M) you can make complex shapes As well as very thin, very thick sections.
n) is compatible with integration The redesign of two or more parts of metals To cast one thereby reducing assembly costs and time.
o) be compatible with the cast of adding other metals.
p) systems in many manufacturing casting low, medium Or higher.
Q) a tendency toward less stress than the sediment Warpage metals and other competitors.

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