Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent
1994-05-24
1995-07-04
Shaw, Clifford C.
Electric heating
Metal heating
Nonatmospheric environment at hot spot
219137WM, B23K 918
Patent
active
054302692
ABSTRACT:
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 by
REFERENCES:
patent: 4273838 (1981-06-01), Biemiller
Chemical Abstracts, vol. 117, No. 2, Jul. 13, 1992, AN 12169j, A. Sueda, et al., "Submerged-Arc Welding of Chromium-Molybdenum Steels", p. 263 & JP 3-258490, Nov. 18, 1991.
Chemical Abstracts, vol. 114, No. 26, Jul. 1, 1991, AN 251554a, A. Yamamura, et al., "Submerged-Arc Welding of High Tensile-Strength Chromium-Molybdenum Steel", p. 269 & JP 2-182378, Jul. 17, 1990.
Database WPI, Derwent Publications Ltd., AN 92-352627, JP-A-04 253 595, Sep. 9, 1992.
Patent Abstracts of Japan, vol. 9, No. 135 (M-386)(1858), Jun. 11, 1985, JP-A-60 18280, Jan. 30, 1985.
Gotoh Akinobu
Nakagawa Takeshi
Natsume Syogo
Kabushiki Kaisha Kobe Seiko Sho
Shaw Clifford C.
LandOfFree
Submerged arc welding method for high strength Cr-Mo steel does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Submerged arc welding method for high strength Cr-Mo steel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Submerged arc welding method for high strength Cr-Mo steel will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-761978