Comparison Between A.C and D.C Arc Welding
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Centrifugal casting
Centrifugal casting Centrifugal casting uses a permanent mold that is rotated about its axis at a speed between 300 to 3000 rpm as the molt...
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INOCULATION OF METALS IN CASTING: Effects of Inoculation
INOCULATION OF METALS IN CASTING Inoculation may be defined as addition of inoculant to molten metal in order to modify structure of metal a...
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DEGASSIFICATION IN CASTING: Principle of Degassification, Vacuum Degassing, Static Bath Treatement, Induction Degassing, Fractional Degassing, Stream Droplet Degassing, Gas Scavenging, Solid Degassing and Jet Degassing
DEGASSIFICATION IN CASTING Degassification is the process of removing the gases from the melt. If it is impossible to prevent the absorption...
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GASES IN METALS: Precautions to be taken to avoid gas absorption in melt are
GASES IN METALS Most of the problems for producing sound metal castings are due to lack of control of dissolved gases or reaction gas in the...
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SPECIAL TREATMENT OF METALS (MELTS)
SPECIAL TREATMENT OF METALS (MELTS) Before pouring, molten metals are given certain treatments to purify them or to alter the metallographic...
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Gating System: Elements of gating system, Design Considerations of Gating System, Riser, Considerations in Riser Design, Classification of Riser, Function of a riser, Riser Design (Caine’s Method), NRL (Naval Research Laboratory Method) /Shape Factor Method and Design of Runner
Gating System Grating system consists of all the elements which are connected to the flow of molten metal from the ladle to the mould cavit...
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Define Chaplet in casting
Chaplet in casting Chaplet may be defined as the metallic support which is normally kept inside the mould cavity to support placement of cor...
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Define Chill in Casting
Chill in Casting Chill may be defined as a metallic object inserted in mould in order to speed up the solidification of a particular portion...
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Centre Line Feeding Resistance in casting
Centre Line Feeding Resistance in casting It may be defined as the resistance against feeding an alloy in a mould cavity due to uneven freez...
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Feeding Distance in Casting
Feeding Distance in Casting Feeding distance may be defined as the distance a riser can feed the metal in a casting. It is affected mainly b...
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Pattern Materials: Wood, Metal, Plastic, Plaster, Wax
Pattern Materials Selection of pattern material depends on the following factors. Number of castings to be produced Required dimensional acc...
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