Wear and fracture resistant seal sliding ring manufacturing method involves coating composite ring with resin, application of an energy beam to carbonize resin and application of vaporized metal powder

摘要

Finished sliding rings comprising fracture resistant non-metallic composite material are coated in a synthetic resin. A point energy beam moves continuously over the coated ring in a protective gas atmosphere to carbonize carbon-based material in the resin and break down the surface of the sliding ring material. Molten metal or metal oxide vaporized by the energy beam and/or additional powdered carbon are then applied to the ring surface and form a tight bond with active components of the ring material and resin. The solidified layers close to the ring surface form a wear resistant layer. Surface treatment depth by the energy source extends to a maximum of 5mm. The protective atmosphere is argon or nitrogen.