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    • 8. 发明申请
    • Method of Manufacturing Bellows
    • 制造波纹管的方法
    • US20090139397A1
    • 2009-06-04
    • US12327261
    • 2008-12-03
    • Tsutomu YoshidaTadahiro OhmiYasuyuki ShiraiMasafumi Kitano
    • Tsutomu YoshidaTadahiro OhmiYasuyuki ShiraiMasafumi Kitano
    • F01B19/00C23C8/18
    • C23C8/18
    • Method for producing at low cost bellows which show high durability even when used in a quite reactive atmosphere. A 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:从平的基板形成未经处理的波纹管,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1×10 12的范围内,从而 在未处理的波纹管的表面上形成Al 2 O 3钝化膜。