What is microstructure of cast iron?
What is microstructure of cast iron?
It is hard, brittle, nonmalleable and more fusible than steel. It has a crystalline structure and is relatively brittle and weaN in tension. Hence it is used in construction and outdoor ornament. The microstructure of cast iron consists of flaNe type, flaNe size and percent of ferrite- pearlite present in the casting.
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 the microstructure of malleable cast iron?
Microstructure. Malleable iron is characterized by microstructures consisting of uniformly dispersed fine particles of free carbon in a matrix of ferrite or tempered martensite. These microstructures can be produced in base metal of essentially same composition.
What is the microstructure of gray cast iron?
Gray cast irons are softer with a microstructure of graphite in transformed-austenite and cementite matrix. The graphite flakes, which are rosettes in three dimensions, have a low density and hence compensate for the freezing contraction, thus giving good castings that are free from porosity.
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.
What is the microstructure of white cast iron?
The microstructure of white cast iron contains cementite (white) and pearlite. It contains interdendritic cementite (white) which sometimes has a Widmanstiitten (‘spiky’) appearance.
What are the characteristics of cast iron?
Mechanical properties of cast iron
- Hardness – material’s resistance to abrasion and indentation.
- Toughness – material’s ability to absorb energy.
- Ductility – material’s ability to deform without fracture.
- Elasticity – material’s ability to return to its original dimensions after it has been deformed.
What are the characteristic properties of cast iron?
Properties of Cast iron
- Hardness. Cast iron is hard and it can be hardened by heating and sudden cooling.
- Toughness. Material’s ability to absorb energy.
- Ductility. Material’s ability to deform without fracture.
- Elasticity.
- Malleability.
- Tensile strength.
- Fatigue strength.
- Melting Point.
What is the crystal structure of cast iron?
Ferrite, also known as α-ferrite (α-Fe) or alpha iron, is a materials science term for pure iron, with a body-centered cubic B.C.C crystal structure. It is this crystalline structure which gives steel and cast iron their magnetic properties, and is the classic example of a ferromagnetic material.
What is the difference between cast iron and mild steel?
Mild steel is a kind of steel containing 0.15 to 0.25 % carbon content and not very many extra alloying components. It is additionally called low carbon steel or soft steel. Cast-iron is a brittle alloy of iron and carbon that can be promptly thrown in a form. Cast iron contains around 2 to 4 % of carbon.
