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Mechanical Engineering

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Mechanical Engineering

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  1. DEFINITION • Explosion welding is a solid state process that produces a high velocity interaction of dissimilar metals by controlled detonation

  2. Interlayer Base component Components Terminology Anvil Standoff Cladding metal Bond Window Flyer plate Bonding Operation

  3. Process

  4. Detonation Types • Shock wave develops if sonic velocity is greater than 120% of material sonic velocity (type 1) • Detached shock wave results when detonation velocity is between 100% and 120% of material sonic velocity (type 2) • No shock wave is produced if detonation velocity is less than material sonic velocity (type 3)

  5. Welding Parameter • Detonation velocity is a function of – Explosive type – Composition of explosive – Thickness of explosive layer

  6. No heat-affected zone (HAZ) • Only minor melting • Material melting temperatures and coefficients of thermal expansion differences do not affect the final product • The shock front compresses and heats the explosive material which exceeds the sonic velocity of undetonated explosives ADVANTAGES

  7. APPLICATION • Chemical Processing • Petroleum Refining • Hydrometallurgy • Aluminium Smelting • Shipbuilding • Electrochemical • Oil & Gas • Power Generation • Cryogenic Processing • Pulp & Paper • Air conditioning & Chillers • Metal Production

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