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    Tial-based alloys with excellent oxidation resistance, and method for producing the same
    3.
    发明授权
    Tial-based alloys with excellent oxidation resistance, and method for producing the same 失效

    公开(公告)号：US06410154B1

    公开(公告)日：2002-06-25

    申请号：US08952514

    申请日：1997-11-28

    申请人： Hiroyuki Kawaura ,  Kazuaki Nishino ,  Takashi Saito

    发明人： Hiroyuki Kawaura ,  Kazuaki Nishino ,  Takashi Saito

    IPC分类号： B32B900

    摘要： The invention relates to TiAl-base alloys with excellent oxidation resistance, and a method for producing the same. The TiAl-base alloy of the invention comprises a substrate and a surface part formed on the substrate, the surface part comprising at least one element of Cr, Nb, Ta and W and having a surface condition capable of forming a dense film of an oxide of the element or Al2O3 in high-temperature oxidizing atmospheres. The method of the invention comprises heating a TiAl-base alloy material having an Al content of from 15 at. % to 55 at. % in the presence of an oxide having a smaller negative value of standard free energy of formation than that of alumina. The method of the invention provides TiAl-base alloys with excellent oxidation resistance.

    Method for surface treatment
    4.
    发明授权
    Method for surface treatment 失效
    表面处理方法

    公开(公告)号：US4892759A

    公开(公告)日：1990-01-09

    申请号：US228423

    申请日：1988-08-05

    申请人： Tohru Arai ,  Hiromasa Takeda ,  Hiroyuki Kawaura

    发明人： Tohru Arai ,  Hiromasa Takeda ,  Hiroyuki Kawaura

    IPC分类号： C23C10/28 ,  C04B35/56 ,  C04B35/58 ,  C23C8/06 ,  C23C12/02 ,  C23C16/32 ,  C23C16/34 ,  C23C16/36 ,  C23C16/442 ,  C23C16/448 ,  H01G13/00 ,  H01G17/00 ,  H01L21/56

    CPC分类号： C23C16/36 ,  C23C16/32 ,  C23C16/34 ,  C23C16/442 ,  C23C16/4481 ,  C23C16/4488

    摘要： Particles of a layer-forming agent containing at least one element for forming a surface layer of e.g. a carbide on the material to be treated are disposed in a furnace below and/or at the side of the material to be treated. A fluidizing gas is introduced into the furnace below the layer-forming agent for fluidizing a powder of alumina or other refractory material to form a fluidized bed above the layer-forming agent, while the agent is not fluidized. The furnace is heated and a solid halide is supplied into the furnace below the layer-forming agent. The halide is sublimable to produce a gas which activates the element, so that it may combine with a particular element which the material to be treated contains, whereby the surface layer is formed thereon. An apparatus for forming such a surface layer is also provided.

    摘要翻译： 含有形成表面层的至少一种元素的成层剂的颗粒。 将要处理的材料上的碳化物设置在待处理材料的下方和/或侧面的炉中。 流化气体被引入成层剂下方的炉中，用于使氧化铝或其它耐火材料的粉末流化，以在成型剂上形成流化床，同时试剂不流化。 加热炉，并将固体卤化物供给到成层剂下面的炉中。 卤化物可升华以产生激活元件的气体，使得其可与要处理的材料所含的特定元件结合，由此在其上形成表面层。 还提供了一种用于形成这种表面层的装置。

    Method of producing a metallic part exhibiting excellent oxidation resistance
    5.
    发明授权
    Method of producing a metallic part exhibiting excellent oxidation resistance 失效
    具有优异的抗氧化性的金属部件的制造方法

    公开(公告)号：US06309699B2

    公开(公告)日：2001-10-30

    申请号：US09255035

    申请日：1999-02-22

    申请人： Hiroyuki Kawaura ,  Hiroshi Kawahara ,  Takashi Saito ,  Kazuaki Nishino ,  Nobuhiko Matsumoto ,  Tadahiko Furuta

    发明人： Hiroyuki Kawaura ,  Hiroshi Kawahara ,  Takashi Saito ,  Kazuaki Nishino ,  Nobuhiko Matsumoto ,  Tadahiko Furuta

    IPC分类号： B05D112

    CPC分类号： C23C24/04

    摘要： The invention provides a method of producing an oxidation-resistant metallic part which exhibits oxidation resistance even in an oxidation atmosphere. The method includes the step of applying mechanical energy to a surface of a metallic part in the presence of particulates, and forming a protective coating in a surface of the metallic part. When the metallic part thus treated is exposed in a high temperature-oxidation atmosphere, the protective coating is oxidized to restrain the proceeding of the oxidation of the metallic part, that is the internally proceeding formation of TiO2, thus serving a remarkable improvement of the oxidation resistance.

    摘要翻译： 本发明提供一种即使在氧化气氛中也具有抗氧化性的抗氧化金属部件的制造方法。 该方法包括在微粒存在的情况下将机械能施加到金属部件的表面，并在金属部件的表面形成保护涂层的步骤。 当这样处理的金属部分在高温氧化气氛中暴露时，保护涂层被氧化以抑制金属部件的氧化进程，即内部进行的TiO 2形成，从而显着改善氧化 抵抗性。

    Surface-treated metallic part and processing method thereof
    6.
    发明授权
    Surface-treated metallic part and processing method thereof 失效
    表面处理金属部件及其加工方法

    公开(公告)号：US5980659A

    公开(公告)日：1999-11-09

    申请号：US893181

    申请日：1997-07-15

    申请人： Hiroyuki Kawaura ,  Hiroshi Kawahara ,  Kazuaki Nishino ,  Takashi Saito

    发明人： Hiroyuki Kawaura ,  Hiroshi Kawahara ,  Kazuaki Nishino ,  Takashi Saito

    IPC分类号： B23P9/04 ,  C22C1/10 ,  C23C24/04 ,  C23C26/00 ,  B05D1/12

    CPC分类号： B23P9/04 ,  C22C1/1084 ,  C23C24/04 ,  C23C26/00

    摘要： Surface-treating metallic parts are produced by applying mechanical energy to the surface of a metallic part and to a substance on or near the surface of the metallic part. The substance is different from the metallic part in composition. The applying step forms a mechanically-alloyed layer from the metallic part and the substance in the surface of the metallic part. The surface-modified layer such as the mechanically-alloyed layer is a non-peeling alloyed layer having a composition or structure different from that of the metallic part. The method is effective in surface-treating light metal materials of which the surfaces are difficult to treat. For example, the method is applicable to soft Mg alloys and Al alloys to improve their surface hardness, and the thus-treated alloys are usable in slide parts which are required to have good wear resistance. It is also applicable to the improvement in the oxidation resistance of Ti alloy parts which are used at high temperatures, and to the improvement in the corrosion resistance of Mg alloys which are said to have poor corrosion resistance.

    摘要翻译： 表面处理金属部件通过向金属部件的表面和金属部件的表面上或其附近的物质施加机械能而产生。 该物质与组成中的金属部分不同。 施加步骤从金属部件和金属部件的表面中的物质形成机械合金化层。 表面改性层如机械合金层是具有与金属部件不同的组成或结构的非剥离合金层。 该方法在表面难以处理的轻金属材料的表面处理中是有效的。 例如，该方法适用于软Mg合金和Al合金以提高其表面硬度，并且这样处理的合金可用于需要具有良好耐磨性的滑动部件中。 也适用于在高温下使用的Ti合金部件的耐氧化性的提高，耐腐蚀性差的Mg合金的耐腐蚀性的提高。