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    • 1. 发明申请
    • Advanced Fe-5Cr-X Alloy
    • 先进的Fe-5Cr-X合金
    • US20160281197A1
    • 2016-09-29
    • US14668766
    • 2015-03-25
    • DALMINE SpA
    • Matteo OrtolaniEttore AnelliMichael L. SantellaGovindarajan Muralidharan
    • C22C38/50C21D8/10C21D6/00C22C38/00C22C38/44C22C38/42C22C38/04C22C38/02C21D9/08C22C38/48
    • A tubular article can be formed from high temperature steam oxidation resistant and high temperature creep resistant alloy steel. The steel can include a chemical composition that include Fe, C, Si, Mn, Ni, Cr, Cu, Ti, Nb, Mo, and N, and optionally other elements. The steel alloy can include 0.06 to 0.15 wt % C, 0.1 to 0.5 wt % Si, 0.2 to 0.6 wt %, 0.05 to 0.4 wt % Ni, 4.5 to 6.0 wt % Cr, 1.0 to 2.0 wt % Cu, 0.04 to 0.08 wt % Ti, 0.01 to 0.06 wt % Nb, 0.45 to 1.2 wt % Mo, and 0.008 to 0.05 wt % N, up to 0.01 wt % of optional element Al, up to 0.01 wt % of optional element Zr, up to 3.0 wt % of optional element Co, up to 0.07 wt % of optional element V, up to 3.0 wt % of optional element W, up to 0.015 wt % of optional element P, up to 0.003 wt % of optional element S, up to 0.1 wt % of optional element Ca, up to 0.1 wt % of optional element Ta, up to 0.1 wt % of optional element Mg, up to 0.1 wt % of optional element Se, up to 0.1 wt % of optional element Te, up to 0.1 wt % of optional element B, up to 0.1 wt % of optional element Bi, and Fe. The steel can include copper precipitates and fine carbides, nitrides, or both. The steel can have a final microstructure comprising tempered martensite, tempered bainite, or a combination thereof. The steel can contain less than 2 vol % residual austenite.
    • 管状制品可由高温耐氧化,耐高温蠕变合金钢制成。 钢可以包括Fe,C,Si,Mn,Ni,Cr,Cu,Ti,Nb,Mo和N以及任选的其它元素的化学组成。 钢合金可以包括0.06〜0.15重量%的C,0.1〜0.5重量%的Si,0.2〜0.6重量%,0.05〜0.4重量%的Ni,4.5〜6.0重量%的Cr,1.0〜2.0重量%的Cu,0.04〜0.08重量% %Ti,0.01〜0.06重量%的Nb,0.45〜1.2重量%的Mo和0.008〜0.05重量%的N,最多0.01重量%的任选元素Al,至多0.01重量%的任选元素Zr,至多3.0重量% 的可选元素Co,至多0.07重量%的任选元素V,至多3.0重量%的任选元素W,至多0.015重量%的任选元素P,至多0.003重量%的任选元素S,至多0.1重量% 的可选元素Ca,至多0.1重量%的任选元素Ta,至多0.1重量%的任选元素Mg,至多0.1重量%的任选元素Se,至多0.1重量%的任选元素Te,至多0.1重量% 的可选元素B,至多0.1重量%的任选元素Bi和Fe。 钢可以包括铜沉淀物和细小碳化物,氮化物或两者。 钢可以具有包括回火马氏体,回火贝氏体或其组合的最终显微组织。 钢可含有少于2体积%的残余奥氏体。