What are the different types of cast iron draw the microstructure of any four types of cast irons give one application for each?
The 4 Types of Cast Iron
- #1) Gray Cast Iron. The most common type, gray cast iron features a graphite microstructure consisting of many small fractures.
- #2) White Cast Iron. While not as common as gray cast iron, white cast iron is another type worth mentioning.
- #3) Ductile Cast Iron.
- #4) Malleable Cast Iron.
How do you test cast iron for microstructure?
Most standard microscopic checks of cast irons are done with a magnification of 100x, which makes the graphite appear black. However, higher magnifications are required to verify if the carbon is completely retained, as well-polished graphite is grey.
What is a pearlite microstructure?
Pearlite is a common microstructure occurring in many grades of steels. It is hard and strong because of the layered structure, and is used in a variety of applications. Pearlite is wear-resistant because of a strong lamellar network of ferrite and cementite.
What is cementite microstructure?
Cementite (or iron carbide) is a compound of iron and carbon, more precisely an intermediate transition metal carbide with the formula Fe3C. By weight, it is 6.67% carbon and 93.3% iron. It has an orthorhombic crystal structure.
Which microstructure is the hardest?
Martensite
Martensite: the hardest and strongest microstructure, yet the most brittle. Pearlite: Hard, strong, and ductile but not particularly tough. Bainite: has desirable strength-ductility combination, harder than pearlite but not as hard as martensite.
What is ferrite microstructure?
The ferrite microstructure is the major constituent of carbon steels. It is essentially iron, containing less than 0.005% of carbon at room temperature. Because of the low carbon content, ferrite microstructure is soft and can easily be deformed.
What are the different types of cast steels?
Cast steels can be broken into two broad categories—carbon cast steel and alloyed cast steel. Like wrought steels, carbon cast steels can be classified according to their carbon content. Low carbon cast steel (0.2% carbon) is relatively soft and not readily heat-treatable.
What is the microstructure of malleable cast iron?
The microstructure of Malleable cast iron types containing black irregular carbon and white matrix as follows; After annealing stages, process of cooling can divide malleable iron into three grades;
What is the microstructure development of grey cast iron?
To learn about microstructure development of grey cast iron, Follow cast iron types development. In malleable cast iron, graphite particles are present in form irregular shaped nodules rather than flakes. This type of cast iron is developed by heat treatment of white cast iron.
What is the difference between high carbon and alloyed cast steel?
High carbon cast steel (0.5% carbon) is used when maximum hardness and wear resistance are desired. Alloyed cast steel is categorized as either low- or high-alloy. Low-alloy cast steel (≤ 8% alloy content) behaves similarly to normal carbon steel, but with higher hardenability.