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    • 6. 发明授权
    • High velocity powder thermal spray method for spraying non-meltable
materials
    • 高速粉末热喷涂方法,用于喷涂不可熔材料
    • US4999225A
    • 1991-03-12
    • US290928
    • 1989-01-05
    • Anthony J. RotolicoBurton A. KushnerAmr Aly
    • Anthony J. RotolicoBurton A. KushnerAmr Aly
    • B05B7/20B05D1/10C23C4/12
    • B05D1/10B05B7/205C23C4/129B05D2508/00
    • A method for producing a dense and tenacious coating with a thermal spray gun including a nozzle member and a gas cap. The gas cap extends from the nozzle and has an inwardly facing cylindrical wall defining a combustion chamber with an open end and an opposite end bounded by the nozzle. An annular flow of a combustible mixture is injected at a pressure of at least two bar above atmospheric pressure from the nozzle coaxially into the combustion chamber. An annular outer flow of pressurized air is injected from the nozzle adjacent to the cylindrical wall. Powder particles having a heat-stable, non-fusible component and a heat-softenable component, and entrained in a carrier gas, are fed axially from the nozzle into the combustion chamber. An annular inner flow of pressurized air is injected from the nozzle into the combustion chamber coaxially between the combustible mixture and the powder-carrier gas. Upon combusting the annular mixture a supersonic spray stream containing the powder is propelled through the open end to produce a coating.
    • 一种用包括喷嘴构件和气帽的热喷枪制造致密且韧性的涂层的方法。 气帽从喷嘴延伸并且具有限定具有开口端和由喷嘴限定的相对端的燃烧室的面向内的圆柱形壁。 将可燃混合物的环形流在高于大气压的至少2巴的压力下从喷嘴同轴地注入燃烧室中。 加压空气的环形外部流体从邻近圆柱形壁的喷嘴喷射。 具有热稳定的非易熔组分和可热软化组分并夹带在载气中的粉末颗粒从喷嘴轴向地进入燃烧室。 加压空气的环形内部流体从喷嘴喷射到可燃混合物和粉末载体气体之间同轴的燃烧室中。 在燃烧环形混合物时,含有粉末的超音速喷射流通过开口端被推进以产生涂层。