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    • 3. 发明授权
    • Low-hydrogen-type covered arc welding electrode for high strength CR-MO
steels
    • 用于高强度CR-MO钢的低氢型覆盖电弧焊接电极
    • US5688420A
    • 1997-11-18
    • US724828
    • 1996-10-02
    • Akinobu GotohTakeshi Nakagawa
    • Akinobu GotohTakeshi Nakagawa
    • B23K9/23B23K35/30B23K35/36B23K35/365B23K35/22
    • B23K35/308B23K35/365B23K35/3602
    • A low-hydrogen-type covered arc welding electrode for high-strength Cr--Mo steels comprising a core wire and a covering material, is characterized in that the contents of components and impurities in the covered arc welding electrode are specified, the water content in the entire welding electrode is controlled to 50 to 600 ppm by weight, and the basicity BL of the covering material expressed by the following equation is controlled to 2.0 to 8.0: (BL=(�CaO!.sub.f +�MgO!.sub.f +�BaO!.sub.f +�CaF.sub.2 !.sub.f +�Na2O!.sub.f +�K.sub.2 O!.sub.f +0.5.times.(�FeO!.sub.f +�MnO!.sub.f))/(�SiO.sub.2 !.sub.f +0.5.times.(�Al.sub.2 O.sub.3 !.sub.f +�TiO.sub.2 !.sub.f +�ZrO.sub.2 !.sub.f))), wherein �Y!.sub.f represents a content of chemical component Y in the covering material by weight percent to the total weight of the covering material.
    • 包括芯线和覆盖材料的高强度Cr-Mo钢的低氢型覆盖电弧焊接电极的特征在于,规定了覆盖电弧焊接电极中的成分和杂质的含量, 将整个焊接电极控制在50〜600重量ppm,将由下式表示的覆盖材料的碱度BL控制在2.0〜8.0(BL =([CaO] f + [MgO] f + [BaO] f + [CaF2] f + [Na2O] f + [K2O] f + 0.5x([FeO] f + [MnO] f))/([SiO2] f + 0.5x([Al2O3] f + [TiO2] f + [ZrO2] f) ),其中[Y] f表示覆盖材料中化学成分Y的含量,以覆盖材料的总重量的百分比表示。
    • 8. 发明授权
    • Submerged arc welding method for high strength Cr-Mo steel
    • 埋弧焊法高强度Cr-Mo钢
    • US5430269A
    • 1995-07-04
    • US248208
    • 1994-05-24
    • Syogo NatsumeAkinobu GotohTakeshi Nakagawa
    • Syogo NatsumeAkinobu GotohTakeshi Nakagawa
    • B23K9/18B23K35/30B23K35/362
    • B23K35/362B23K35/308B23K9/186
    • A submerged arc welding method for a high strength (2.25%-3%)Cr-3% Mo-V steel, to obtain a weld metal excellent in strength at room temperature and high temperature, toughness, and creep strength, after SR, temper brittleness resistance, cold crack resistance and SR crack resistance. The Cr-Mo steel contains: 2.00 to 3.25% of Cr, 0.90 to 1.20% of Mo, and V as essential components, and Nb, Ti, B and Ca as needed. A welding heat input is in the range of from 20 to 50 kJ/cm. The solid wire contains 0.09 to 0.19% of C, 0.30% or less of Si, 0.50 to 1.40% of Mn, 2.00 to 3.80% of Cr and 0.90 to 1.20% of Mo. The bonded flux contains 5 to 20% of SiO.sub.2, 20 to 40% of MgO, 2.4 to 12% of a metal fluoride (F-converted value) and 3 to 12% of a metal carbonate (CO.sub.2 -converted value). A weld metal contains 0.08 to 0.15% of C, 0.05 to 0.30% of Si, 0.50 to 1.20% of Mn, 0.030 to 0.060% of O, 0.10 to 0.50% of V and 0.005 to 0.035% of Nb. P and Ti in the weld metal are restricted to 0.010% or less and 0.012% or less, respectively. The components of C, Si, Mn, O, P, Ti are added from the solid wire and the bonded flux, and the components of V and Nb are added from at least one of the wire and the bonded flux. Moreover, the welding is performed such that Ps is 3.50 to 5.50, Ps being expressed byPs= 10.times.[ C].sub.D + 10.times.[ Si].sub.D +[Mn].sub.D + 50.times.[ P].sub.D + 20.times.[ O].sub.Dwhere [X].sub.D is wt % of the component X in weld metal.
    • 一种用于高强度(2.25%-3%)Cr-3%Mo-V钢的埋弧焊接方法,以获得在SR振荡后在室温和高温,韧性和蠕变强度下的强度优异的焊接金属 耐脆性,耐寒裂纹性和SR抗裂性。 Cr-Mo钢包含:2.00〜3.25%的Cr,0.90〜1.20%的Mo,V作为必要成分,Nb,Ti,B和Ca。 焊接热输入在20至50kJ / cm的范围内。 实心线包含C:0.09〜0.19%,Si:0.30%以下,Mn:0.50〜1.40%,Cr:2.00〜3.80%,Mo:0.90〜1.20%。粘合剂含有5〜20% MgO的20〜40%,金属氟化物的2.4〜12%(F转化值)和金属碳酸盐的3〜12%(CO 2转化值)。 焊接金属含有0.08〜0.15%的C,0.05〜0.30%的Si,0.50〜1.20%的Mn,0.030〜0.060%的O,0.10〜0.50%的V和0.005〜0.035%的Nb。 焊接金属中的P和Ti分别限制在0.010%以下且0.012%以下。 C,Si,Mn,O,P,Ti的组分从固体焊丝和焊接助焊剂中添加,V和Nb的成分从焊丝和粘合焊剂中的至少一种添加。 此外,进行焊接,使得Ps为3.50〜5.50,Ps以Ps = 10×[C] D + 10×[Si] D + [Mn] D + 50×[P] D + 20×[O] D表示,其中[X] D为 焊接金属中组分X的wt%。