A sandblasted tungsten alloy dart barrel features high-pressure alumina or glass bead impact forming random micropits uniform rough surface, providing medium-inclusive friction and tactile. Tungsten alloy hardness ensures pit edges non-loose, binder phase filling micro-cracks preventing expansion. In grip, micropits fit fingertip skin, pressure diffusion forming sponge-like buffer, dry-hand roughness prominent enhancing grasp, wet-hand pits store sweat forming water film reducing shear. During throw, sandblasted surface resistance balanced, release no mutation, flight posture tolerant suitable beginners. Processing from blank overall or zoning blasting, masking controlling zone roughness Ra0.8-3.2μm, nitrogen purging removing residual sand, chemical vapor titanium nitride film covering pit bottoms enhancing anti-oxidation. In application, sandblasted barrels suit club universal training and multi-hand players, front-mid-rear roughness gradient matching grip migration. Internal uniform cavities sandblast zone density balanced reinforcing stability. Compared to knurling, sandblasting randomness more inclusive suitable wet-hand; compared to coating, rough feedback more natural. Environmental blasting media recycled, waste sand magnetic separation. Personalization hand condition scanning adjusting blast pressure, ensuring grip like universal sandpaper. This sandblasted defines uniform roughness benchmark, advancing inclusive surface engineering.
