Join metal without melting it
Friction stir welding is a solid-state process: a rotating tool stirs two metals together below their melting point, forging a high-strength, defect-free joint with no filler, no spatter, and no fumes. We supply NTK's ceramic and carbide FSW tooling — custom-ground for everything from EV busbars and battery cases to stainless hulls and high-tensile steel.
A stronger join, with less weight and no weld defects
Because the base metal never melts, FSW avoids the porosity, distortion, and heat-affected weakness of fusion welding — and it joins dissimilar metals that can't be fused at all. For structural and lightweighting work, it replaces bolted joints outright.
Ceramic — SiAlON
High-strength SiAlON ceramic with reinforced toughness, excellent thermal-shock resistance, and outstanding wear durability — for stainless steel, carbon steel, and copper.
Carbide — fine-particle
Fine-particle cemented carbide with enhanced toughness and superior chipping resistance — for aluminum alloy and die-cast work, including EV battery cases and busbars.