File Name: structure and properties of white cast iron .zip
Effect of niobium on the solidification structure and properties of hypoeutectic high-chromium white cast irons. Maruma I ; L. Mampuru I ; S.
Gray iron , or grey cast iron , is a type of cast iron that has a graphitic microstructure. It is named after the gray color of the fracture it forms, which is due to the presence of graphite. It is used for housings where the stiffness of the component is more important than its tensile strength , such as internal combustion engine cylinder blocks , pump housings, valve bodies, electrical boxes, and decorative castings.
As cast irons are relatively inexpensive, very easily cast into complex shapes and readily machined, they are an important engineering and structural group of materials. Unfortunately not all grades are weldable and special precautions are normally required even with the so-called weldable grades. Cast irons can be conveniently grouped according to their structure which influences their mechanical properties and weldability; the main groups of general engineering cast irons are shown in Fig. Grey cast irons contain 2. Their structure consists of branched and interconnected graphite flakes in a matrix which is pearlite, ferrite or a mixture of the two Fig. The graphite flakes form planes of weakness and so strength and toughness are inferior to those of structural steels.
Cast Iron: Physical and Engineering Properties describes the importance of iron and its properties, as well as the process of casting in the different fields of engineering. The book covers topics such as the mechanical, physical, and electrical properties of iron and the different tests under which it is subjected; the effects of heat treatment on gray cast iron; and the resistance of cast iron to heat and stress. Topics also include internal casting stresses; cast iron beams and columns; and the application of the specifications for cast iron to design. The text is recommended for metallurgists and engineers who are interested in cast iron, its properties, and its uses in construction. We are always looking for ways to improve customer experience on Elsevier. We would like to ask you for a moment of your time to fill in a short questionnaire, at the end of your visit.
The alloy constituents affect its colour when fractured: white cast iron has carbide impurities which allow cracks to pass straight through, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks, and ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing. Carbon C ranging from 1. Iron alloys with lower carbon content are known as steel.
Cast iron is a ferrous alloy that is made by re-melting pig iron in a capola furnace until it liquefies. The molten iron is poured into molds or casts to produce casting iron products of the required dimensions. Based on the application of cast iron, the alloying elements added to the furnace differ. The commonly added alloy elements are carbon followed by silicon.
The most common type, gray cast iron features a graphite microstructure consisting of many small fractures. When gray cast iron is produced, the fractures open up to reveal the gray-colored graphite underneath the surface. With that said, gray cast iron offers similar compressive strength as steel. While not as common as gray cast iron, white cast iron is another type worth mentioning.
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