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    • 34. 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。
    • 38. 发明授权
    • Method of manufacturing bellows
    • 制造波纹管的方法
    • US08250966B2
    • 2012-08-28
    • US12327261
    • 2008-12-03
    • Tsutomu YoshidaTadahiro OhmiYasuyuki ShiraiMasafumi Kitano
    • Tsutomu YoshidaTadahiro OhmiYasuyuki ShiraiMasafumi Kitano
    • F16J3/04
    • C23C8/18
    • Method for producing at low cost bellows which show high durability even when used in a quite reactive atmosphere. The method for manufacturing bellows includes the steps of: I: forming an untreated bellows from a flat base plate, the base plate including 15 to 30 wt % of Cr, 5 to 40 wt % of Ni, 0.9 to 6 wt % of Al, less than 1 wt % of Mo, less than 0.1 wt % of Mn, less than 0.1 wt % of C, less than 0.1 wt % of S, less than 0.1 wt % of P and a balance of Fe and an unavoidable impurity (relative to 100 wt % of the base plate); and II: heating the untreated bellows at a temperature of 750 to 895° C. in an atmosphere which contains water and hydrogen and in which the volume ratio of hydrogen to water (H2/H2O) is in the range of 2×103 to 1×1012, thereby forming an Al2O3 passivation film on a surface of the untreated bellows.
    • 低成本波纹管的生产方法,即使在相当活跃的气氛中使用也显示出高耐用性。 制造波纹管的方法包括以下步骤:I:从平的基板形成未处理的波纹管,基板包括15至30重量%的Cr,5至40重量%的Ni,0.9至6重量%的Al, 小于1重量%的Mo,小于0.1重量%的Mn,小于0.1重量%的C,小于0.1重量%的S,小于0.1重量%的P和余量的Fe和不可避免的杂质(相对 至100重量%); 和II:在含有水和氢的气氛中,在750至895℃的温度下加热未处理的波纹管,其中氢与水的体积比(H 2 / H 2 O)在2×10 3至1的范围内 ×1012,由此在未处理的波纹管的表面上形成Al 2 O 3钝化膜。