What are the properties of white cast iron?
What are the properties of white cast iron?
White cast iron has a light appearance due to the absence of graphite. It has a high compressive strength and retains good hardness and strength at higher temperatures. The presence of different carbides, depending on the alloy content, makes white cast irons extremely hard and abrasion resistant but very brittle.
What is the dominant mechanical properties of white cast iron?
White cast iron has a high compressive strength and excellent wear resistance, and it retains its hardness for limited periods even up to a red heat. It can be produced in selected areas of a casting—such as on the periphery of a cam—by causing localized rapid solidification of the iron.
What is cast iron and its properties?
Cast iron is a group of iron-carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. Iron alloys with lower carbon content are known as steel. Cast iron tends to be brittle, except for malleable cast irons.
What is white cast iron used for?
White cast irons are used in abrasion-resistant parts where it’s brittleness is of minimum concern such as shell liners, slurry pumps, ball mills, lifter bars, extrusion nozzles, cement mixers, pipe fittings, flanges, crushers and pump impellers. A popular grade of white iron is high chrome white irons, ASTM A532.
What is white casting?
Whitewashing is a casting practice in the film industry in which white actors are cast in non-white roles.
What is the difference between gray and white cast cast iron?
Like gray cast iron, white cast iron features many small fractures. The difference is that white cast iron features cementite below its surface, whereas gray cast iron features graphite below its surface. The graphite creates the appearance of a gray color, while the cementite creates the appearance of a white color.
What is the composition of white cast iron?
White cast iron is a type of carbon-iron alloy that contains carbon content greater than 2% in the form of cementite. The name white cast is derived from its white surface, which is caused by carbide impurities that allows cracks throughout the metal. When fractured it exhibits a silver-like (white) fracture.
What is white iron?
Definition of white iron 1 : iron in thin sheets coated with tin : tinplate. 2 : a hard silvery-white pig iron or cast iron having its carbon content almost entirely in combined form.
What is a white cast iron How is malleable cast iron produced from white cast iron?
Malleable iron is cast as white iron, the structure being a metastable carbide in a pearlitic matrix. Through an annealing heat treatment, the brittle structure as first cast is transformed into the malleable form.
What is the melting point of white cast iron?
Summary
| Name | White Iron |
|---|---|
| Melting Point | 1260 °C |
| Thermal Conductivity | 15-30 W/mK |
| Heat Capacity | 540 J/g K |
| Price | 1.5 $/kg |
Is white cast iron magnetic?
They almost entirely spin in the same direction as one another. This makes them attracted to other metals that are similarly magnetic. Cobalt and nickel are similar metals in this case. The force that is between the atoms in these metals creates a magnetic field, and the cast iron itself is magnetic.
What are the characteristics of white cast iron?
White cast iron has a high compressive strength and excellent wear resistance, and it retains its hardness for limited periods even up to a red heat. It can be produced in selected areas of a casting—such as on the periphery of a cam—by causing localized rapid solidification of the iron. White cast iron at the surface of a casting is called chill.
What is the chemical composition of cast iron?
Cast iron is an important engineering material with a number of advantages, mainly good castability and machinability and moderate mechanical properties. White cast iron contains 1.8 % -3.6 % C, 0.5 % -1.9 % Si and 1 % – 2 % manganese (Mn).
What are the types of cast iron and their applications?
Types of cast iron and their applications 1 Grey cast iron. Grey cast iron, or gray iron, has a dark grey fracture colour due to a graphitic microstructure. 2 White cast iron. White cast iron has a white fracture colour due to the presence of iron carbide, or cementite Fe3C. 3 Malleable cast iron. 4 Ductile cast iron.
What are the advantages and disadvantages of cast iron?
Comparing with steel, the cast iron has three to five times more compression strength. Cast iron has excellent resistance to wear. It has Resistance to deformation and has Low stress concentration. The disadvantages of Cast Iron are as follows. Cast iron has high brittleness. White cast iron is non-machinable.
