Patent ID: 6548125
Filing Date: 2003-04-15
Classification: B23K,C23C,F41A,Y02T

Abstract:
A method of coating an inner surface of a weapon barrel comprising the following steps:1) coating a region on the inner surface of the weapon barrel by steps (a) and (b) consisting essentially of (a) directing a laser beam against the inner barrel surface to cause melting of regions thereof; and (b) introducing a coating material in one of powder, wire and ribbon form into the laser beam for melting the coating material to produce in said regions a molten bath composed of the molten coating material and a material of the weapon barrel; said coating material being selected from the group consisting of niobium, molybdenum, tantalum, haffium, chromium, vanadium, tungsten, zirconium and alloys thereof; and 2) solidifying the molten bath by (c) moving the laser beam inside the weapon barrel axially thereof and relative thereto while performing steps (a) and (b), whereby the molten substance of the bath becomes rigid as the laser beam moves away therefrom.