| 摘要 |
An arc hardfacing rod for producing a hard surface ¢Fig. 7! including a tubular member, a filler material, an insulating coating and a plurality of discrete metal carbide particles set within the insul ating coating such that a surface of a portion of the metal carbide particles is uncovered. The filler carbide particles include tungs ten carbide particles, titanium carbide panicles, tantalum carbide particles, niobium carbide particles, zirconium carbide panicle s, vanadium carbide particles, hafnium carbide particles, molybdenum carbide particles, chromium carbide particles, silicon car bide particles and boron carbide particles, cemented composites and mixtures thereof. Adhered to the exterior surface of the tubular member is an insulating coating including a coating flux and a coating bonding agent. A plurality of discrete metal carbide particle s are set within the insulating coating such that a surface of a portion of the metal carbide particles is uncovered. The metal ca rbide particles may be of the same composition as the filler carbide particles forming the filler material or the metal carbide pa rticles may be macrocrystalline tungsten carbide particles, cast tungsten carbide particles, crushed sintered cemented tungsten c arbide particles or pelletized cemented tungsten carbide particles, and mixtures thereof. |
