Submerged Arc Strip Cladding SASC Typically 750 A, up to 40 lb/hr Typical dilution of %
Electroslag Strip Cladding ESC - Typically 1400 A, up to 60 lb/hr, dilution 5-15%
Additive Manufacturing (AM) – An Extension of Cladding From single beads stacked upon each other (bottom) To large features at high deposition rates (top) Mitigated by balance of net-shape, metallurgical requirements, mechanical properties (tensile, fatigue, etc.)
AM – Progressive Layers Additive manufacturing - build in layers, stress relieve/PWHT, machine, as/if necessary
Deposition Rate vs Resolution Courtesy Boeing Decreased Resolution Increased Deposition Rate
Summary Surface engineering is a broad field ranging from ion implantation to explosive cladding in terms of the mass of material deposited in unit time. Practical methods for powder and strip cladding areas large and small, across a range of industries, include fusion-based processes such as GTA, PTA, GMA, laser, SASC, and ESSC depending on the area to be clad, deposit thickness, and chemistry required. Others include thermal spray, e.g., HVOF. Many processes require two layers to achieve the desired surface chemistry and corrosion resistance; others require only one layer.
Questions? Ian D. Harris Technology Leader, Arc Welding Phone: