Diffusion coating mixtures
    62.
    发明授权
    Diffusion coating mixtures 失效
    扩散涂料混合物

    公开(公告)号:US4617202A

    公开(公告)日:1986-10-14

    申请号:US310085

    申请日:1981-10-09

    申请人: Alfonso L. Baldi

    发明人: Alfonso L. Baldi

    摘要: Diffusion coatings can be masked from portions of a workpiece by combination of layers the outer one of which forms coherent strong shell that holds inner layer or layers in place. All ingredients of these layers can be materials such as nickel, nickel aluminide, chronium, chromic oxide (Cr.sub.2 O.sub.3) and inert diluent, that do not contaminate superalloys or even low alloy or plain carbon steels. Layer can be deposited from suspension in a solution of film-former like and acrylic resin in readily volatilizable solvent such as methyl chloroform or chloroform. Innermost layer can be depletion-preventing and can be omitted. Such a holding shell can also be used to retain on a workpiece surface a layer that causes formation of a diffusion coating. Chromizing can be performed before aluminizing. Low alloy steel conduit can be internally chromized and/or externally chromized or aluminized to make it more desirable for use as high pressure steam boiler heat exchange tubing. Masking mixtures can be pastes extruded into place. Masking with resin-free masking powder while workpiece is subjected to gas-phase diffusion coating is particularly desirable.

    摘要翻译: 扩散涂层可以通过层的组合从工件的部分掩蔽,其中外层形成保持内层或多层的相干强的外壳。 这些层的所有成分可以是诸如镍,镍铝,时代,氧化铬(Cr 2 O 3)和惰性稀释剂的材料,其不会污染超级合金甚至低合金或普通碳钢。 层可以从成膜剂和丙烯酸树脂的溶液中的悬浮液沉积在容易挥发的溶剂如甲基氯仿或氯仿中。 最内层可以是消耗性的,可以省略。 这种保持壳也可用于在工件表面上保持形成扩散涂层的层。 镀铝前可进行镀铬处理。 低合金钢管可以内部镀铬和/或外部镀铬或镀铝,使其更适合用作高压蒸汽锅炉换热管。 掩模混合物可以将糊料挤出就位。 特别需要在工件进行气相扩散涂覆时用无树脂的掩蔽粉末进行掩模。

    Table ii
    64.
    发明授权
    Table ii 失效

    公开(公告)号:US3664765A

    公开(公告)日:1972-05-23

    申请号:US3664765D

    申请日:1970-03-09

    IPC分类号: C23C10/38 F01D5/14

    摘要: AN ALLOY COMPRISED MAINLY OF CHROMIUM, NICKEL AND COBALT AND EXCELLENT IN CORROSION- AND HEAT RESISTANCE, PARTICULARLY, AN ALLOY HAVING THE HIGH CORROSION RESISTANCE TO A HIGH TEMPERATURE COMBUSTION GAS CONTAINING SULFUR OXIDES AND ALKALI COMPOUNDS AND SUITABLE FOR A BLADE FOR A GAS TURBINE. THE SAID ALLOY IS PROVIDED WITH A CHROMIUM DIFFUSION LAYER ON ITS SURFACE BY A CHROMIZING TREATMENT.