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    • 1. 发明申请
    • Welding method for fluorine-passivated memberfor welding, fluorine-passivated method after being weld, and welded parts priority data
    • 用于焊接的氟钝化件的焊接方法,焊接后的氟钝化方法以及焊接部件优先数据
    • US20050011935A1
    • 2005-01-20
    • US10805555
    • 2004-03-19
    • Tadahiro OhmiTakahisa NittaYasuyuki ShiraiOsamu Nakamura
    • Tadahiro OhmiTakahisa NittaYasuyuki ShiraiOsamu Nakamura
    • B23K9/16B23K1/20B23K9/23B23K35/38
    • B23K35/383B23K1/20Y10T428/12535Y10T428/12979Y10T428/31678
    • The present invention provides a welding method for materials to be welded which are subjected to fluoride passivation treatment, and a fluoride passivation retreatment method, wherein, when fluoride passivation retreatment was conducted after welding, there is no generation of particles or dust, and superior resistance is provided to fluorine system gases. In the present invention, when materials to be welded comprising stainless steel subjected to fluoride passivation treatment are welded, hydrogen is added to the gas (the back shield gas) flowing through the materials to be welded. Furthermore, in the welding method for materials to be welded which are subjected to fluoride passivation treatment in accordance with the present invention, the thickness of the fluoride passivated film in a predetermined range from the butt end surfaces of the materials to be welded, comprising stainless steel subjected to a fluoride passivation treatment, is set to 10 nm or less, and welding is conducted. Furthermore, in the fluoride passivation retreatment method in accordance with the present invention, after conducting the welding method described above, at least the welded parts are heated, and a gas containing fluorine gas is caused to flow in the interior part.
    • 本发明提供一种待进行氟化物钝化处理的待焊接材料的焊接方法,以及氟化物钝化再处理方法,其中,在焊接后进行氟化物钝化再处理时,不产生颗粒或灰尘,且具有优异的电阻 被提供给氟系气体。 在本发明中,当焊接包含不锈钢的待焊接材料进行氟化物钝化处理时,向流过待焊接材料的气体(背面保护气体)添加氢。 此外,在根据本发明的被氟化物钝化处理的待焊接材料的焊接方法中,氟化钝化膜的厚度在待焊接材料的对接端面的预定范围内,包括不锈钢 进行氟化物钝化处理的钢被设定为10nm以下,进行焊接。 此外,在本发明的氟化物钝化再处理方法中,在进行了上述的焊接方法之后,至少加热了焊接部,并且使含有氟气的气体在内部流动。
    • 4. 发明授权
    • Welding method for fluorine-passivated member for welding, fluorine-passivated method after being weld, and welded parts priority data
    • 用于焊接的氟钝化部件的焊接方法,焊接后的氟钝化方法以及焊接部件的优先权数据
    • US06962283B2
    • 2005-11-08
    • US10805555
    • 2004-03-19
    • Tadahiro OhmiTakahisa NittaYasuyuki ShiraiOsamu Nakamura
    • Tadahiro OhmiTakahisa NittaYasuyuki ShiraiOsamu Nakamura
    • B23K9/16B23K1/20B23K9/23B23K35/38B23K5/213B23K20/24B23K31/02
    • B23K35/383B23K1/20Y10T428/12535Y10T428/12979Y10T428/31678
    • The present invention provides a welding method for materials to be welded which are subjected to fluoride passivation treatment, and a fluoride passivation retreatment method, wherein, when fluoride passivation retreatment was conducted after welding, there is no generation of particles or dust, and superior resistance is provided to fluorine system gases.In the present invention, when materials to be welded comprising stainless steel subjected to fluoride passivation treatment are welded, hydrogen is added to the gas (the back shield gas) flowing through the materials to be welded. Furthermore, in the welding method for materials to be welded which are subjected to fluoride passivation treatment in accordance with the present invention, the thickness of the fluoride passivated film in a predetermined range from the butt end surfaces of the materials to be welded, comprising stainless steel subjected to a fluoride passivation treatment, is set to 10 nm or less, and welding is conducted. Furthermore, in the fluoride passivation retreatment method in accordance with the present invention, after conducting the welding method described above, at least the welded parts are heated, and a gas containing fluorine gas is caused to flow in the interior part.
    • 本发明提供一种待进行氟化物钝化处理的待焊接材料的焊接方法,以及氟化物钝化再处理方法,其中,在焊接后进行氟化物钝化再处理时,不产生颗粒或灰尘,且具有优异的电阻 被提供给氟系气体。 在本发明中,当焊接包含不锈钢的待焊接材料进行氟化物钝化处理时,向流过待焊接材料的气体(背面保护气体)添加氢。 此外,在根据本发明的被氟化物钝化处理的待焊接材料的焊接方法中,氟化钝化膜的厚度在待焊接材料的对接端面的预定范围内,包括不锈钢 进行氟化物钝化处理的钢被设定为10nm以下,进行焊接。 此外,在本发明的氟化物钝化再处理方法中,在进行了上述的焊接方法之后,至少加热了焊接部,并且使含有氟气的气体在内部流动。
    • 9. 发明授权
    • Welding technique for forming passive chromium oxide film in weld and gas feed system for welding
    • 焊接和焊接进气系统中形成无源氧化铬膜的焊接技术
    • US06563072B1
    • 2003-05-13
    • US09509707
    • 2000-06-08
    • Tadahiro OhmiTakahisa NittaYasuyuki ShiraiOsamu Nakamura
    • Tadahiro OhmiTakahisa NittaYasuyuki ShiraiOsamu Nakamura
    • B23K3538
    • B23K35/38B23K9/0026B23K9/16B23K35/383C23C8/10
    • Welding of material such as a piping using ferrite system stainless steel, in which a back sealed gas used for conventional welding is switched from argon gas (or a hydrogen gas/argon gas mix) to an argon gas to which an oxidizing gas is doped at the time of forming a chromium oxide passivation film. Welding conditions are set at the temperature in which the inner surface of the piping does not melt at the time of forming the chromium oxide passivation film. The temperature of the welding piping is set uniformly between welding conditions in conventional welding and welding conditions at the time of forming the chromium oxide passivation film, and in order to replace gases used with conventional welding with gases used at the time of forming the chromium oxide passivation film. A cycle of one round or more is performed under the welding conditions for forming a chromium oxide passivation film, thereby, to form the chromium oxide passivation film on a weld in concurrence with welding.
    • 将用于常规焊接的背面密封气体从氩气(或氢气/氩气混合物)切换到掺杂有氧化气体的氩气的铁氧体系不锈钢的管道的材料的焊接 形成氧化铬钝化膜的时间。 焊接条件设定为在形成氧化铬钝化膜时管道的内表面不熔化的温度。 在形成氧化铬钝化膜时,焊接管道的温度在常规焊接和焊接条件的焊接条件之间均匀地设置,并且为了代替在形成氧化铬时使用的气体的常规焊接中使用的气体 钝化膜。 在形成氧化铬钝化膜的焊接条件下进行一圈以上的循环,由此在焊接上形成与焊接同时的氧化铬钝化膜。