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    • 6. 发明授权
    • Method of thermally spraying metallic coatings using flux cored wire
    • 使用药芯焊丝热喷镀金属涂层的方法
    • US5820939A
    • 1998-10-13
    • US829666
    • 1997-03-31
    • Oludele Olusegun PopoolaMatthew John ZaluzecArmando Mateo JoaquinDeborah Rose PankDavid James Cook
    • Oludele Olusegun PopoolaMatthew John ZaluzecArmando Mateo JoaquinDeborah Rose PankDavid James Cook
    • C23C4/02B05B7/22B05B13/06C23C4/04C23C4/16C23C4/06
    • C23C4/04B05B13/0636B05B7/224
    • A method of thermally spraying at least one adherent metallic coating onto an unroughened cleansed aluminum or aluminum alloy substrate to produce a coated substrate, comprising: wire-arc thermally spraying of melted metallic bonding droplets and fluxing particles onto the substrate using air propulsion to concurrently adherently deposit flux particles and bonding droplets, the spraying using air propulsion and a wire feedstock having a core and a sheath, the wire core being constituted of both metal powder readily metallurgically bondable to the substrate and a fluxing powder that readily deoxidizes the substrate, the wire sheath being constituted of pliable metal that is metallurgically compatible with the core metal powder, the fluxing powder having a halide salt chemistry effective to deoxidize the substrate upon contact of the melted fluxing powder therewith, said fluxing powder and bonding metal having a particle size that more uniformly promotes distribution throughout said spray. A flux cored wire for use in thermal spraying of aluminum or aluminum alloy substrates, comprising (a) a powder core mixture consisting of (i) a metal bonding powder effective to metallurgically bond by an exothermic reaction with the substrate when the bonding metal powder is in a melted condition, (ii) a fluxing powder effective to strip aluminum oxides from said substrates when in the melted condition, (b) a pliable metal sheath encapsulating the powder mixture and having a composition that is metallurgically compatible with the bonding metal and also is effective to react with aluminum surfaces to form intermetallics.
    • 一种将至少一种粘附金属涂层热喷涂到未增韧的清洁的铝或铝合金基底上以产生涂覆的基底的方法,其包括:使用空气推进线将弧熔融的金属粘结液滴和助熔颗粒热喷涂到基底上以同时粘附 沉积助焊剂颗粒和结合液滴,使用空气推进的喷涂和具有芯和护套的焊丝原料,所述焊丝芯由易于冶金地结合到衬底的金属粉末和易于使衬底脱氧的助熔粉末构成,所述焊丝 护套由与金属粉末冶金相容的柔韧金属构成,该助熔粉末具有卤化物盐化学物质,其有效地使熔融的助熔粉末与其接触时使基底脱氧,所述助熔粉末和结合金属具有更大的粒径 均匀地促进分布在整个spra y。 一种用于铝或铝合金基底的热喷涂的药芯焊丝,包括(a)粉末芯混合物,其包含(i)当所述粘合金属粉末为接合金属粉末时,通过放热反应与所述基板有效地冶金结合的金属粘合粉末 在熔融状态下,(ⅱ)当处于熔融状态时,有效地从所述基底上剥离氧化铝的助熔粉末,(b)包裹粉末混合物并具有与粘合金属冶金学相容的组成的柔韧金属鞘,以及 有效地与铝表面反应形成金属间化合物。