B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
78/40
B23K 5/12 (2006.01) B23K 9/04 (2006.01) B23K 35/00 (2006.01)
Patent
CA 1099539
N-26-20921M/yo/79 ABSTRACT OF THE DISCLOSURE A welding method for stainless steel overlays is disclosed wherein a welded stainless steel overlay is prevented from exfoliating out of an inner surface of a high pressure vessel. Hydrogen exists at a partial pressure of less than 150 kg/cm2 and a temperature less than 450°C in the pressure vessel. At least one low alloy steel weld-overlay is pre- liminarily welded over the inner surface of the pressure vessel. The preliminary low alloy steel weld overlay is com- posed of similar composition to the base metal of the vessel, containing niobium and/or nickel. Thereafter, at least one customary ferritic steel or austenitic steel weld-overlay is welded thereon.
320907
Adachi Takao
Chiba Ryuichi
Fuji Akiyoshi
Ohnishi Keizo
George H. Riches And Associates
Japan Steel Works Ltd. (the)
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