Iron oxide threatens all iron-melting processes. In cupola melting, much greater amounts of iron oxide are produced during the normal melt cycle than are produced in electric furnace melting. This makes iron oxide’s effect much more pronounced in cupola melting. In EF melting, 20%-30% oxidation loss is the extreme of losses encountered. In cupola melting, […]
Thousands of years ago duplicate metal structures were cast from an original sculpture by the lost-wax casting process. Investment casting is one of the oldest metal-forming techniques based on this lost-wax casting process. A beeswax pattern is coated with refractory ceramic material, which then hardens and takes the shape of the casting. The ceramic mold […]
Casting Chronicles The history of humanity is defined by man’s relationship with the material world. Man’s ability to make tools from metals has changed our historical trajectory. A copper frog from Mesopotamia (modern-day Iraq) dating back to 3200 BCE is the oldest known casting. Farm tools made of cast iron were used in China in […]
The process of forging produces some of the strongest manufactured components as compared to other metal manufacturing process, making it so important in the metal manufacturing industry. Forging does not change the grain structure of the metal as it is formed, making it all the more innovative. It is the process of shaping metals into […]
In metalworking, casting is the process of setting molten metallic material in a pre-designed mold. Once the molten metal cools, it becomes a solid metal object in the desired shape. Casting can be achieved with a wide variety of metals, and various materials can be used to form the molds and other equipment. Because casting […]
Metal shrinks as it transforms from liquid to solid (known as solidification shrinkage) and undergoes additional thermal contraction as it cools to room temperature. Cast parts are therefore designed with shrinkage allowances to result in parts of the desired dimensions. Cast steel, for example, will shrink about ¼ in. per foot and produce rough-looking castings. […]
Die casting is a popular manufacturing process for the casting of metal products. There are two main die casting process types and several variations in process design. When molten metal is forced into mold cavities at high pressure, it is known as die casting. The process is best suited for speedy production of bulk metallic […]
The metal casting process is the oldest and popular method of manufacturing means of designing the desired shapes. It is the first step in manufacturing most products. Casting is made from any metal that can be melted and can have any shape the designer desires. The castings can produce in sizes ranging from a few […]
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The cast iron is obtained by re-melting pig iron with coke and limestone in a furnace known as a cupola. It is an alloy of iron and carbon. The carbon contents in cast iron differ from 1.7% to 4.5%. Also, it contains a very small amount of silicon, sulfur, manganese, and phosphorus. Carbon is present […]
The Moulding sand is also known as foundries sand, this sand is commonly used for making moulds. Natural sand located on the bed and banks of rivers gives a larger source, although high-quality silica sand is also mined. The sand is chemically Si02, silicon dioxide in a granular manner. Ordinary river sand contains a percentage […]