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    • 9. 发明公开
    • METHOD FOR GAS-PLASMA SPRAYING OF METAL COATINGS
    • VERFAHREN ZUM GAS-PLASMA-SPRÜHENVON METALLBESCHICHTUNGEN。
    • EP0455812A1
    • 1991-11-13
    • EP90913571.7
    • 1990-01-15
    • LENINGRADSKY POLITEKHNICHESKY INSTITUT IMENI M.I.KALININA
    • KARASEV, Mikhail ValentinovichKLUBNIKIN, Valery StepanovichPETROV, Georgy Konstantinovich
    • C23C4/12
    • C23C4/134
    • A method for gas-plasma spraying of metal coatings provides for feeding, accelaration and heating of metal powder particles (5) in the plasma jet and placing the surface of the articles (7) to be coated on the path of the particles (5), the dimensions of the particles (5) introduced to the jet being no less than 20 µm. The spraying of coatings is carried out at the enthalpy of the plasma jet (3) defined by the following relationship: H = (0.46 - 0.69)√d, where H is the enthalpy of the plasma jet (3) in kJ/g, d is the average dimension of the sprayed particles (5); the plasma-forming gas consumption is maintained at a value not exceeding that corresponding to the starting point of sedimentation of the coating (8) at the enthalpy of the plasma jet (3) H = 0.69√d, whereas the power of the plasma jet (3) is maintained at a value corresponding to the starting point of sedimentation of the coating (8) at enthalpy H = 0.46√d.
    • 用于等离子体喷涂金属涂层的方法提供了在等离子体射流中金属粉末颗粒(5)的进料,加速和加热,并将待涂覆的制品(7)的表面放置在颗粒(5)的路径上, 引入射流的颗粒(5)的尺寸不小于20微米。 涂层的喷涂在等离子体射流(3)的焓处进行,等离子体射流(3)由以下关系定义:H =(0.46-0.69)2ROOT d,其中H是等离子体射流(3)的焓(kJ / g) d是喷雾颗粒(5)的平均尺寸; 等离子体形成气体消耗量保持在不超过与等离子体射流焓(3)H = 0.69 2ROOT d时涂层(8)的沉淀起始点相对应的值,而等离子体射流的功率 (3)保持在对应于焓H = 0.46 2ROOT d下涂层(8)沉降起始点的值。