Method of submerged arc welding a thick steel plate with large h

Details Method of submerged arc welding a thick steel plate with large h Method of submerged arc welding a thick steel plate with large h

1989-12-22

1991-04-02

Shaw, Clifford C.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

219137R, 2191463, B23K 918

Patent

active

050048848

ABSTRACT:
A method of submerged arc welding of thick steel plates with a large heat input and flux for submerged arc welding which comprises: forming a groove having a multi-angle shape which has at least two different angular inclination when a single side submerged arc welding for perfect penetration is conducted under a condition of an welding heat input of 100 to 1000 kJ/cm; using submerged arc welding flux SiO.sub.2 : 5 to 28% by weight, MgO: 15 to 35% by weight, CaO: 5 to 15% by weight, CaF.sub.2 : 2 to 20% by weight, Al.sub.2 O.sub.3 : 5 to 15% by weight, and TiO.sub.2 : 2 to 10% by weight as the main components, and containing iron powder by 30% by weight or less and either or both of Si and Mn in the metallic form by 10% by weight, the submerged arc welding flux having a particle size distribution arranged such that the proportion of the particle size distribution arranged such that the proportion of the particle which have a size finer than 36 mesh is 20% by weight or less and the proportion of the particles which have a size 14 mesh or finer but 36 mesh or rougher is 60% by weight or more; and conducting the welding.

REFERENCES:
patent: 1532842 (1925-04-01), Stresau
patent: 3932200 (1976-01-01), Miyano et al.
patent: 4041270 (1977-08-01), Akahide et al.
patent: 4196335 (1980-04-01), Ikeda et al.
patent: 4363951 (1982-12-01), Shiga

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