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    • 9. 发明申请
    • Ultra Supercritical Boiler Header Alloy and Method of Preparation
    • 超超临界锅炉头合金及其制备方法
    • US20090257908A1
    • 2009-10-15
    • US12420251
    • 2009-04-08
    • Brian A. BakerGaylord D. SmithRonald D. Gollihue
    • Brian A. BakerGaylord D. SmithRonald D. Gollihue
    • C22C19/05C22C30/00C22F1/10
    • C22C19/055C22C19/05C22C19/058C22F1/10F22B37/22
    • A high temperature, high strength Ni—Co—Cr alloy possessing essentially fissure-free weldability for long-life service at 538° C. to 816° C. contains in % by weight about: 23.5 to 25.5% Cr, 15-22% Co, 1.1 to 2.0% Al, 1.0 to 1.8 % Ti, 0.95 to 2.2% Nb, less than 1.0% Mo, less than 1.0% Mn, less than 0.3% Si, less than 3% Fe, less than 0.3% Ta, less than 0.3% W, 0.005 to 0.08% C, 0.01 to 0.3% Zr, 0.0008 to 0.006% B, up to 0.05% rare earth metals, 0.005% to 0.025% Mg plus optional Ca and the balance Ni including trace additions and impurities. The strength and stability is assured at 760° C. when the Al/Ti ratio is constrained to between 0.95 and 1.25. Further, the sum of Al+Ti is constrained to between 2.25 and 3.0. The upper limits for Nb and Si are defined by the relationship: (% Nb+0.95)+3.32(% Si)
    • 在538℃至816℃下具有基本上无裂缝焊接性能的高温,高强度Ni-Co-Cr合金,其重量百分比约为23.5至25.5%,15-22% Co,1.1〜2.0%的Al,1.0〜1.8%的Ti,0.95〜2.2%的Nb,小于1.0%的Mo,小于1.0%的Mn,小于0.3%的Si,小于3%的Fe,小于0.3%的Ta, 小于0.3%W,0.005〜0.08%C,0.01〜0.3%Zr,0.0008〜0.006%B,0.05%以下的稀土金属,0.005%〜0.025%的Mg加上任选的Ca,余量为Ni,含有痕量的添加剂和杂质 。 当Al / Ti比被限制在0.95和1.25之间时,强度和稳定性在760℃下被确定。 此外,Al + Ti的总和被限制在2.25和3.0之间。 Nb和Si的上限由以下关系定义:(%Nb + 0.95)+3.32(%Si)<3.16。