Electric heating – Metal heating – For deposition welding
Patent
1980-02-08
1982-12-14
Rubinson, Gene Z.
Electric heating
Metal heating
For deposition welding
219 7614, 21914641, B23K 904, B23K 3534
Patent
active
043639526
ABSTRACT:
A method for overlay welding of stainless steel on the inner surfaces of pressure vessels as used for treating hydrogen at elevated temperature, e.g. below 450.degree. C. and under high pressure, e.g. below 150 kg/cm.sup.2, is provided wherein, in order to prevent the disbonding of the welded stainless steel, as the 1st layer weld overlay including martensitic structure of 4 to 40% by area or additionally including ferritic structure of up to 8% by area is used. For this purpose the chemical composition of the stainless steel weld metal is defined as essentially comprising of up to 0.1% C, up to 1.0% Si, up to 2.0% Mn, 7 to 12% Ni, 12 to 18% Cr, up to 1.0% Mo, and up to 0.1% Al, the balance being Fe. The stainless steel weld overlay may further include Nb of above 8 times the carbon content but up to 1.0%.
REFERENCES:
patent: 3975610 (1976-08-01), Bagshaw et al.
patent: 4143258 (1979-03-01), McCann et al.
patent: 4224360 (1980-09-01), Ohnishi et al.
Lary, Howard B; Modern Welding Technology; Prentice-Hall Inc., Englewood Cliffs, N.J., 1979; pp. 666-673; TK 4660 C37.
Metals Handbook, 8th Edition, vol. 6, "Welding and Braizing", p. 457; American Society for Metals; Metals Park, Ohio; 1971; TA 472 A3.
Adachi Takao
Chiba Ryuichi
Fuji Akiyoshi
Naitoh Katsuyuki
Okada Hachiro
Chiyoda Chem. Engineering & Construction Co.
George Keith E.
Japan Steel Works Ltd.
Rubinson Gene Z.
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