Electroslag welding is used to join two thick metal plates without edge preparation. The plates to be welded are held in vertical position keeping some gap between edges. Continue reading What is Electroslag Welding? Process, Diagram, Advantages & Disadvantages
In the electron beam welding process, an electron is made to travel in vacuum at high speed by exciting it. This electron strikes the surface of the metal to be welded. The impact gives rise to heat energy which melts the metal and thus welding is obtained. Continue reading What is Electron Beam Welding? Process, Diagram, Advantages & Applications
In Direct arc furnace, an electric arc is struck between carbon or graphite electrodes which produces intense heat. The impurities are oxidized from the charge by melting and absorbed by slag. The slag is run off by tilting the furnace. Continue reading What is Direct Arc Furnace? Construction, Working, Diagram, Advantages & Disadvantages
Investment Moulding process is also known as lost-wax process or precision casting. In this process, expendable pattern of wax polystyrene plastics or frozen mercury is used for making the casting mould. The term investment refers to the refractory mould surrounding the refractory covered wax pattern. Continue reading What is Investment Moulding? Process, Diagram, Advantages & Disadvantages
Shell Moulding process is especially suitable for casting thin walled parts of small or medium size. Stable shell moulds are prepared from a mixture of fine grained quartz sand and synthetic resin binder (thermosetting plastics) such as phenol formaldehyde, urea formaldehydes, alkydes, polysters etc. Continue reading What is Shell Moulding? Process, Diagram, Advantages & Disadvantages