7 High Duty Cast Iron
Gray cast iron gray cast iron can be developed by refining crude iron through the addition of a large number of old steel (scrap) in the kitchen of a cupola. Changes in the form of graphite occurs during heat treatment, or with additional ingredients.
8. Spheriodal Graphite Cast Iron
Spheriodal graphite cast iron is made from iron elements with the addition of magnesium or cerium, and thus bentk of graphite will change. Spheriodal graphite cast iron casting is heated at a temperature of 9000C for several hours, the carbon element will break away, the cooling process will transform most forms of metal structure into ferritic spheriodal graphite cast iron.
Spheriodal graphite cast iron has mechanical properties between gray cast iron (gray cast iron) with steel. This is because iron lower carbon content than the gray cast iron (gray cast iron), therefore a change in the form of graphite particles will provide reinforcement to the nature of spheriodal graphite. Thus the nature of cast iron can be dibengkok to remove slag and distortion.
Spheriodal graphite cast iron can be done with the wet and dry machining, can be welded by normal techniques and given a coating with a layer of copper (copper) or chromium for corrosion resistance (wear resistance). Spheriodal graphite cast iron is listed on the British standard in two grade according to the voltage according to the number and percentage of increase in length.
Ferritic spheriodal more resilient graphite cast iron (ductile) and pearlitic spheriodal graphite cast iron is stronger. Spheriodal graphite cast iron is widely used in the industries of automotive components such as crank shafts, brake drums, transmission casting and others.
9. Pearlitic Cast Iron
Pearlitic cast iron is made by providing the added amount of calcium silicate material which has of pearlitic cast iron is a product with the name Meehanite, have a basic structure of pearlite can be described secaramikroscopoc subtle form of graphite flakes. Meehanite produce according to the demand for large jobs have a voltage that varies between 210 hingga590 N / mm2.
10 Iron Castings Alloys
To meet the needs of specific properties, a large number of alloying elements are added to the cast iron, it is common to all the elements of chemical compounds and give effect to the cast iron, as occurs in steel alloys, and the effect is very large percentage of carbon content, especially on the size of the thickness of the object casting itself that requires cooling control.
Giving an alloying element in cast iron aims to improve the properties of the covering cast iron mechanical properties, phisic properties and chemical properties such as increased stress, hardness, corrosion resistance, response to heat treatment, and other properties that are more specific.