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    • 1. 发明授权
    • Fluidized bed method of forming a nitride or carbonitride layer
    • 形成氮化物或碳氮化物层的流化床方法
    • US4871401A
    • 1989-10-03
    • US123662
    • 1987-11-13
    • Tohru AraiJunji EndoHiromasa Takeda
    • Tohru AraiJunji EndoHiromasa Takeda
    • C23C12/02
    • C23C12/02
    • A method of forming a nitride or carbonitride layer on the surface of an iron or iron alloy article, which comprises the steps of: (a) disposing in a fluidized bed furnace a treating agent comprising a refractory powder, a metal powder of at least one selected from the group consisting of chromium, vanadium, titanium and a metal containing at least one of the chromium, vanadium and titanium, and a halide powder; (b) introducing a nitrogen-containing gas into the fluidizied bed furnace; (c) heating the fluidized bed furnace; and (d) disposing the article in the fluidized bed furnace during or after the steps (a) to (c). In this method, the article is preferably treated at a temperature not higher than 650.degree. C. The step (c) may precede the step (b). The halide powder may be supplied to the fluidized bed furnace from outside in the form of green compact or a gas.
    • 一种在铁或铁合金制品的表面上形成氮化物或碳氮化物层的方法,包括以下步骤:(a)在流化床炉中设置包括耐火粉末,至少一种 选自铬,钒,钛和含有铬,钒和钛中的至少一种的金属和卤化物粉末; (b)将含氮气体引入流化床炉; (c)加热流化床炉; 和(d)在步骤(a)至(c)期间或之后将制品置于流化床炉中。 在该方法中,优选在不高于650℃的温度下进行处理。步骤(c)可以在步骤(b)之前。 卤化物粉末可以从生坯或气体的形式从外部供应到流化床炉。
    • 2. 发明授权
    • Method of surface treatment and apparatus used therefor
    • 表面处理方法及其使用的设备
    • US4844949A
    • 1989-07-04
    • US249251
    • 1988-09-23
    • Tohru AraiJunji EndoHiromasa Takeda
    • Tohru AraiJunji EndoHiromasa Takeda
    • C23C10/36C23C10/52C23C12/00C23C12/02C23C16/06C23C16/32C23C16/34C23C16/36C23C16/442C23C16/448F27B15/10
    • C23C16/32C23C16/34C23C16/36C23C16/442C23C16/4488Y10S118/05
    • A method of forming a surface layer of carbide, nitride, carbonitride, or solid-solution on the surface of a material to be treated, which comprises disposing in a fluidized bed furnace a treating agent comprising a powder of a refractory material, and a powder of a metal for forming a carbide, nitride, carbonitride or solid-solution or a powder of an alloy thereof, introducing a fluidizing gas into the fluidized bed furnace to fluidize the treating agent and form a fluidized layer, disposing the material to be treated in the fluidized layer, and introducing a predetermined amount of halide into the fluidized layer, and an apparatus for forming the surface layer on the material to be treated, comprising a furnace body for forming the surface layer in the fluidized layer of the treating agent, a heating furnace for heating the fluidized layer, a halide supply pipe in communication with the outside of the furnace body, and a halide gas jetting pipe disposed within the furnace body, which is connected to the halide supply pipe and has a plurality of apertures opened into the fluidized layer.
    • 在待处理材料的表面上形成碳化物,氮化物,碳氮化物或固溶体的表面层的方法,其包括在流化床炉中设置包含耐火材料粉末和粉末的处理剂 用于形成碳化物,氮化物,碳氮化物或固溶体的金属或其合金粉末,将流化气体引入流化床炉中以使处理剂流化并形成流化层,将待处理的材料置于 流化层,并将预定量的卤化物引入到流化层中,以及用于在待处理材料上形成表面层的装置,包括在处理剂的流化层中形成表面层的炉体, 用于加热流化层的加热炉,与炉体外部连通的卤化物供给管和设置在炉体内的卤化物气体喷射管,其中 连接到卤化物供给管,并且具有通向流化层的多个孔。
    • 3. 发明授权
    • Surface treating method and apparatus
    • 表面处理方法和装置
    • US4786526A
    • 1988-11-22
    • US66483
    • 1987-05-29
    • Tohru AraiJunji EndoHiromasa Takeda
    • Tohru AraiJunji EndoHiromasa Takeda
    • C23C8/20C23C8/06C23C8/24C23C10/08C23C10/14C23C16/32C23C16/34C23C16/448B05D1/22
    • C23C16/34C23C16/32C23C16/4488C23C8/06Y10S118/05
    • A method and apparatus for forming a layer of a carbide or nitride of, for example, titanium or vanadium on the surface of material to be treated in a fluidized bed furnace. A refractory powder for forming a fluidized bed, a vessel or vessels filed with powder of a treating agent, and the material to be treated are placed in the furnace. The treating agent includes powder of at least one carbide or nitride forming metal or alloy and powder of at least one compound selected from the group consisting of chlorides, fluorides, bromides, iodides and boro-fluorides of alkali and alkaline earth metals and/or at least one of an ammonium halide and a metal halide. A fluidizing gas is introduced into the furnace under heat to form a fluidized bed in which the surface of the material to be treated is treated. The vessel or vessels are placed in the furnace in a spaced-apart relation from the material to be treated, so that no powder of the treating agent may adhere to the surface of the material to be treated.
    • PCT No.PCT / JP86 / 00360 Sec。 371日期1987年5月29日 102(e)日期1987年5月29日PCT提交1986年7月14日PCT公布。 公开号WO87 / 0207300 日期:1987年4月9日。一种用于在流化床炉中在待处理材料的表面上形成例如钛或钒的碳化物或氮化物层的方法和装置。 将用于形成流化床的耐火材料粉末,装有处理剂粉末的容器和容器以及被处理材料放入炉中。 处理剂包括至少一种碳化物或氮化物形成金属或合金的粉末和至少一种选自碱金属和碱土金属的氯化物,氟化物,溴化物,碘化物和硼氟化物的化合物和/或在 卤化铵和金属卤化物中的至少一种。 在加热下将流化气体引入炉中以形成待处理材料的表面的流化床。 容器或容器以与待处理材料间隔开的关系放置在炉中,使得处理剂的粉末不会粘附到待处理材料的表面。
    • 4. 发明授权
    • Method of forming a nitride or carbonitride layer
    • 形成氮化物或碳氮化物层的方法
    • US5443662A
    • 1995-08-22
    • US84322
    • 1993-06-30
    • Tohru AraiKazuyuki NakanishiHiromasa TakedaHideo Tachikawa
    • Tohru AraiKazuyuki NakanishiHiromasa TakedaHideo Tachikawa
    • C23C8/06C23C8/24C23C8/30C23C16/442C23C16/44B05D1/22
    • C23C16/442
    • A nitride or carbonitride layer is formed on the surface of a metal material as follows: A treating agent composed of a refractory powder of alumina or the like and a powder of a metal for forming a nitride or a carbide or an alloy thereof is disposed in a fluidized bed furnace; the treating agent is fluidized to form a fluidized bed by introducing an inert gas; the fluidized bed furnace is heated to a temperature of not higher than 700.degree. C.; an activator of a halogenated ammonium salt is intermittently supplied into the fluidized bed at a rate of 0.001 to 5 wt %/hour based on the total amount of the treating agent; and the metal material to be treated is disposed in the fluidized bed during or after any of the above steps. For example, a nitride layer composed of only a metal for forming a nitride which contains almost no Fe--N is formed on the surface of iron steel even at a temperature as low as not higher than 700.degree. C. The layer is very hard and efficient in wear resistance, and the toughness of the base metal is hardly lowered.
    • 在金属材料的表面上如下形成氮化物或碳氮化物层:由氧化铝等的耐火材料粉末和用于形成氮化物的金属粉末或其合金构成的处理剂设置在 流化床炉; 通过引入惰性气体使处理剂流化形成流化床; 将流化床炉加热至不高于700℃的温度; 基于处理剂的总量,以0.001至5重量%/小时的速率将卤化铵盐的活化剂间歇地供给到流化床中; 并且在任何上述步骤期间或之后将要处理的金属材料设置在流化床中。 例如,即使在700℃以下的温度下,也在铁钢的表面上形成仅由形成几乎不含Fe-N的氮化物的金属构成的氮化物层。该层非常硬, 耐磨损性高,贱金属的韧性几乎不降低。