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6 条记录 (耗时 0.016 秒)

    Method of pretreating metallic works
    3.
    发明授权
    Method of pretreating metallic works 失效
    金属制品的预处理方法

    公开(公告)号：US4975147A

    公开(公告)日：1990-12-04

    申请号：US483709

    申请日：1990-02-23

    申请人： Masaaki Tahara ,  Takakazu Tomoda ,  Kenzo Kitano

    发明人： Masaaki Tahara ,  Takakazu Tomoda ,  Kenzo Kitano

    IPC分类号： C23C2/02 ,  C23C8/02 ,  C23C8/26 ,  C23C8/34 ,  C23C14/02 ,  C23C16/02

    CPC分类号： C23C8/34 ,  C23C8/02

    摘要： The primary object of the invention is to clean and activate the surface of metallic works prior to such thermal treatment as nitriding, thermal spraying or dip plating by removing oxidized and other passive layers and foreign matters from the metallic work surface.The method of pretreating metallic works comprises heating a metallic work in a furnace and introducing a fluorine- or fluoride-containing gas into the furnace in that state to thereby cause destruction and elimination of the foreign matters adhering to the metallic work surface and of the oxidized layer occurring on the metallic work surface and simultaneous formation of a fluorinated layer. Just prior to the main thermal treatment, for example nitriding, the fluorinated layer is decomposed and eliminated by introducing an appropriate gas, for example H.sub.2, into the furnace. In this way, the metallic work reveals its cleaned and activated surface.

    摘要翻译： 本发明的主要目的是在通过从金属加工表面除去氧化的和其它被动层和异物进行氮化，热喷涂或浸镀等热处理之前，清洁并激活金属工件的表面。 预处理金属制品的方法包括在炉中加热金属制品并在该状态下将含氟或氟化物的气体引入炉中，从而引起附着在金属工件表面和氧化物 发生在金属工件表面上并同时形成氟化层。 在主要热处理之前，例如氮化，通过将合适的气体（例如H 2）引入炉中来分解和消除氟化层。 以这种方式，金属工作显示其清洁和激活的表面。

    Method of plating steel
    4.
    发明授权
    Method of plating steel 失效
    镀钢方法

    公开(公告)号：US5399211A

    公开(公告)日：1995-03-21

    申请号：US81185

    申请日：1993-06-25

    申请人： Akira Yoshino ,  Masaaki Tahara ,  Haruo Senbokuya ,  Kenzo Kitano ,  Takakazu Tomoda

    发明人： Akira Yoshino ,  Masaaki Tahara ,  Haruo Senbokuya ,  Kenzo Kitano ,  Takakazu Tomoda

    IPC分类号： C23C2/02 ,  C23C4/02 ,  C23C8/80 ,  C23C14/02 ,  C23C28/00 ,  C23C2/00

    CPC分类号： C23C14/02 ,  C23C2/02 ,  C23C28/00 ,  C23C4/02 ,  C23C8/80

    摘要： Upon forming a plating coat on steel works, the works are held in a fluorine- or fluoride-containing gas atmosphere in a heated condition to thereby remove oxidized scales such as SiOx, MnOx and the like on the surface layer of the work and to form a fluoride layer to prevent forming new oxidized scale. The fluoride layer is easily eliminated by an action of added flux to a plating bath or by heating the fluorinated steel works in an atmosphere containing hydrogen prior to dipping in the plating bath to activate the steel surface. The activated steel surface is improved in compatibility with the plating bath and the like to realize a good quality plating coat formation.

    摘要翻译： 在钢厂上形成镀覆层时，工件在加热条件下保持在含氟或氟化物的气体气氛中，从而在工件的表面层上除去SiO x，MnO x等氧化物，形成 氟化物层防止形成新的氧化垢。 氟化物层容易通过向电镀槽中添加助熔剂的作用或通过在浸入镀液中之前在含氢气氛中加热氟化钢制品而激活钢表面而消除。 活化的钢表面与镀液等的相容性提高，以实现优质的镀层形成。

    Method and apparatus for treatment of NF.sub.3 gas
    6.
    发明授权
    Method and apparatus for treatment of NF.sub.3 gas 失效
    NF3气体处理方法和装置

    公开(公告)号：US5176889A

    公开(公告)日：1993-01-05

    申请号：US827538

    申请日：1992-01-30

    申请人： Akira Yoshino ,  Takakazu Tomoda

    发明人： Akira Yoshino ,  Takakazu Tomoda

    IPC分类号： C01B21/02 ,  C07C17/00

    CPC分类号： C01B21/02 ,  C07C17/00

    摘要： In accordance with this invention, a waste gas containing toxic NF.sub.3 gas is contacted with a honeycomb structure of a carbonaceous material to thereby convert NF.sub.3 into nontoxic CF.sub.4 and H.sub.2 gases with high efficiency.

    摘要翻译： 根据本发明，含有有毒的NF 3气体的废气与碳质材料的蜂窝结构体接触，从而以高效率将NF 3转化为无毒的CF 4和H 2气体。