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1.发明授权
公开(公告)号：US5419948A
公开(公告)日：1995-05-30
申请号：US83271
申请日：1993-06-29
申请人： Akira Yoshino , Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
发明人： Akira Yoshino , Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
CPC分类号： F16B33/06 , C21D9/0093 , C23C8/34 , C23C8/80 , Y10T428/24975
摘要： This invention allows the surface of an austenitic stainless steel screw surface to be formed into a hard nitrided layer so as to harden and a part such as a screw head which is in contact with outside air is removed its own ultra hard surface layer in the hard nitrided layer by scouring or the like to be rust preventive. Even if the ultra hard surface layer is thus removed, an inner hard layer in the hard nitrided layer is present beneath the surface layer to be able to maintain a hard state of the screw surface. In the method for manufacturing the austenitic stainless steel screw according to the invention, upon forming said hard nitrided layer on the screw surface by nitriding, the austenitic stainless steel screw surface is cleaned with a fluorine- or fluoride-containing gas prior to nitriding. Thereby remained foreign matter, oxidized layer and the like on the screw surface are removed and at the same time the screw surface is activated and so N atoms easily penetrate and diffuse when nitriding to form a uniform nitrided layer.
摘要翻译： 本发明允许将奥氏体不锈钢螺丝表面的表面形成为硬质氮化层，以使其硬化，并且将与外部空气接触的螺杆头部分除去其自身的硬质表面层 通过冲刷等进行氮化处理以防锈。 即使如此除去超硬表面层，硬质氮化层的内部硬质层也存在于表面层的下方，能够维持螺旋面的硬化状态。 在本发明的奥氏体不锈钢螺杆的制造方法中，通过氮化在螺旋形表面上形成硬质氮化层，在氮化之前用含氟化物或氟化物气体清洗奥氏体不锈钢螺杆面。 由此，除去螺旋表面上的异物，氧化层等，同时螺杆表面被激活，因此氮化物在氮化时容易渗透并扩散，形成均匀的氮化层。
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2.发明授权
公开(公告)号：US5460875A
公开(公告)日：1995-10-24
申请号：US207265
申请日：1994-03-08
申请人： Akira Yoshino , Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
发明人： Akira Yoshino , Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
CPC分类号： F16B33/06 , C21D6/004 , C21D9/0093 , C23C8/34 , C23C8/80 , Y10T428/24983 , Y10T428/26
摘要： This invention allows to form a nitrided hard layer on the surface of an austenitic stainless steel screw by forming a nitrided layer thereon and to prevent causing rust on some parts such as a screw head portion which is in contact with the outside air by removing the nitrided hard layer to expose austenitic stainless steel base which has sufficient corrosion resistance. On the contrary, in a thread part and the like of the screw, the nitrided hard layer is left and to thereby improves hardness and the like to strengthen tapping functions and the like of the screw. In the method for manufacturing the austenitic stainless steel screw according to the invention, the austenitic stainless steel screw is held in a fluorine- or fluoride-containing gas atmosphere prior to nitriding to form a fluorided film on its surface and then is nitrided in that state. Accordingly, so formed nitrided hard layer becomes uniform and deep to obtain an austenitic stainless steel screw having excellent surface properties.
摘要翻译： 本发明允许通过在其上形成氮化层而在奥氏体不锈钢螺钉的表面上形成氮化硬质层，并且通过除去氮化物来防止与外部空气接触的螺纹头部分等部分的锈蚀 硬层暴露出具有足够耐腐蚀性的奥氏体不锈钢基体。 相反，在螺杆的螺纹部分等中，留下氮化硬质层，从而提高硬度等，以增强螺钉的攻丝功能等。 在根据本发明的奥氏体不锈钢螺杆的制造方法中，奥氏体不锈钢螺杆在氮化之前被保持在含氟或氟化物的气体气氛中以在其表面上形成氟化膜，然后在该状态下被氮化 。 因此，如此形成的氮化硬层变得均匀而深，得到具有优异表面性能的奥氏体不锈钢螺杆。
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公开(公告)号：US5417776A
公开(公告)日：1995-05-23
申请号：US285630
申请日：1994-08-04
申请人： Akira Yoshino , Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
发明人： Akira Yoshino , Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
CPC分类号： C23C28/00 , C23C8/80 , F16B33/06 , Y10S411/902 , Y10S411/903 , Y10T428/12569 , Y10T428/12771
摘要： The surface layer of a hard austenitic stainless steel screw is formed as nitrided layer and then is covered by a plating coat or a resin coat to give properties such as shortening the boring time as well as heightening the surface hardness of the screw itself.
摘要翻译： 硬奥氏体不锈钢螺杆的表面层形成为氮化层，然后被电镀涂层或树脂涂层覆盖，以提供诸如缩短钻孔时间以及提高螺杆本身的表面硬度的性能。
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公开(公告)号：US5556483A
公开(公告)日：1996-09-17
申请号：US325666
申请日：1994-10-19
摘要： A method for carburizing austenitic metal comprising fluorinating the austenitic metal and consecutive carburizing at a low temperature not more than 680.degree. C. A carburizing temperature can be lowered by such a fluorination. As a result, carbide of chrome component in the austenitic metal can be prevented from depositing. That is, much chrome component remains in the austenitic metal. Therefore, the austenitic metal surface can be hardened and also superior anti-corrosion property can be maintained.
摘要翻译： 一种渗碳奥氏体金属的方法，包括在低于680℃的低温下氟化奥氏体金属和连续渗碳。通过这种氟化可以降低渗碳温度。 结果，可以防止奥氏体金属中的铬成分的碳化物沉积。 也就是说，奥氏体金属中残留的铬成分很多。 因此，奥氏体金属表面可以硬化，并且还可以保持优异的抗腐蚀性。
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公开(公告)号：US5114500A
公开(公告)日：1992-05-19
申请号：US560694
申请日：1990-07-31
申请人： Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
发明人： Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
摘要： This invention makes a furnace body divide into two, a pretreating chamber and a nitriding chamber by an opening and closing center wall. After pretreating works to be treated in the pretreating chamber, the opening and closing center wall is opened and the pretreated works are transferred to the nitriding chamber to nitride them. Treatment gas can be saved largely compared with the case that the nitriding is conducted after pretreating works in a furnace which has only a nitriding chamber.
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公开(公告)号：US5505791A
公开(公告)日：1996-04-09
申请号：US429841
申请日：1995-04-27
摘要： The present invention relates to nickel alloy products with their surfaces nitrided and hardened which are formed by pressure casting nickel alloy material, and nitrided and hardened layers are formed in surface layers. Since the nitrided and hardened surfaces of the nickel alloy products according to the invention have much better corrosion resistance than iron products have, anticorrosion treatment such as plating is not required, and rich lubricity and excellent tightening property can be obtained without having seizure and scuffing phenomena.
摘要翻译： 本发明涉及通过压铸镍合金材料形成的表面氮化和硬化的镍合金产品，并且在表层形成氮化和硬化层。 由于根据本发明的镍合金产品的氮化和硬化表面具有比铁制品具有更好的耐腐蚀性，因此不需要诸如电镀的防腐蚀处理，并且可以获得丰富的润滑性和优异的紧固性，而不会发生卡塞和磨损现象 。
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公开(公告)号：US5112030A
公开(公告)日：1992-05-12
申请号：US590825
申请日：1990-10-01
申请人： Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
发明人： Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
IPC分类号： C23C8/34
CPC分类号： C23C8/34
摘要： This invention relates to a method of nitriding steel material in a second heat treatment furnace after fluorinating the steel material in a first heat treat furnace to form a deep and uniform nitrided layer. Then, steel material is treated smoothly by defining the ratio of establishing said both furnaces for fluorinating and nitriding on the basis of treating time required for said both treatments since time required for each treatment is different.
摘要翻译： 本发明涉及在第一热处理炉中对钢材进行氟化处理之后，在第二热处理炉中对钢材进行氮化的方法，以形成深而均匀的氮化层。 然后，由于每次处理所需的时间不同，因此基于所述两种处理所需的处理时间，通过定义用于氟化和氮化的所述两个炉的比例来平稳地处理钢材。
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公开(公告)号：US5403409A
公开(公告)日：1995-04-04
申请号：US40616
申请日：1993-03-31
CPC分类号： C23C8/26
摘要： Nitrided stainless steel products having a base material of stainless steel containing austenitic stainless steel. At least a portion of the surface layer of the base material is composed of a nitrided hard layer in accordance with the following conditions (A) and (B):(A) the nitrided hard layer substantially does not contain crystalline chromium nitride, and(B) the nitrided hard layer contains from 2 to 12% by weight N atoms.
摘要翻译： 氮化不锈钢制品，具有含奥氏体不锈钢的不锈钢基材。 根据以下条件（A）和（B），基材表面层的至少一部分由氮化硬质层构成：（A）氮化硬质层基本上不含结晶氮化铬，（ B）氮化硬质层含有2至12重量％的N原子。
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公开(公告)号：US5382318A
公开(公告)日：1995-01-17
申请号：US025679
申请日：1993-03-03
申请人： Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
发明人： Masaaki Tahara , Haruo Senbokuya , Kenzo Kitano , Teruo Minato
CPC分类号： C23C8/34 , C21D9/0093 , C23C8/02 , C23C8/80 , F16B33/06
摘要： This invention allows the surface of an austenitic stainless steel screw surface to be formed into a hard nitrided layer so as to harden and a part such as a screw head which is in contact with outside air is removed its own ultra hard surface layer in the hard nitrided layer by scouring or the like to be rust preventive. Even if the ultra hard surface layer is thus removed, an inner hard layer in the hard nitrided layer is present beneath the surface layer to be able to maintain a hard state of the screw surface. In the method for manufacturing the austenitic stainless steel screw according to the invention, upon forming said hard nitrided layer on the screw surface by nitriding, the austenitic stainless steel screw surface is cleaned with a fluorine- or fluoride-containing gas prior to nitriding. Thereby remained foreign matter, oxidized layer and the like on the screw surface are removed and at the same time the screw surface is activated and so N atoms easily penetrate and diffuse when nitriding to form a uniform nitrided layer.
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公开(公告)号：US5252145A
公开(公告)日：1993-10-12
申请号：US845080
申请日：1992-03-03
摘要： A method of nitriding nickel alloy comprising steps of holding nickel alloy in an atmosphere of fluorine- or fluoride-containing gas in a heated condition and holding the fluorinated nickel alloy in a nitriding atmosphere in a heated condition to provide the nickel alloy with improved surface hardness by forming a deep uniform nitrided layer on the surface of the nickel alloy.
摘要翻译： 一种氮化镍合金的方法，包括在加热条件下将镍合金保持在含氟或氟化物气体的气氛中并将氟化镍合金保持在加热条件下的氮化气氛中，以提供具有改善的表面硬度的镍合金 通过在镍合金的表面上形成深均匀的氮化层。
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