Title:
SUBMERGED ARC WELDING METHOD OF ULTRA-HEAVY STEEL PLATE
Document Type and Number:
Japanese Patent JP2000042741
Kind Code:
A
Abstract:
To provide a submerged are welding method capable of welding an ultra-heavy steel plate of ≥80 mm in thickness with one single side passage of a multi-electrode by appropriately determining a groove shape and a welding current value so as not to generate any welding defects.
A groove angle of a weld joint is 28-38°, a root face R is 0-25% of a thickness (t), a groove sectional area S satisfies inequalities of 18×t≤S≥22×t, and a welding current I of a preceding electrode 1 satisfies inequalities of 300×t1/2≤I≤350 ×t1/2, and an ultra-heavy steel plate 10 of ≥80 mm in thickness is submerged arc welded with one single side passage of a multi-electrode.
Inventors:
NISHI YASUHIKO
TAKAISHI YUZO
SAIGA MASAKAZU
IWATA SHINJI
TOTSUKA TADASHI
TAKAISHI YUZO
SAIGA MASAKAZU
IWATA SHINJI
TOTSUKA TADASHI
Application Number:
JP21552398A
Publication Date:
February 15, 2000
Filing Date:
July 30, 1998
Export Citation:
Assignee:
NIPPON KOKAN KK
International Classes:
B23K9/00; B23K9/18; B23K33/00; (IPC1-7): B23K9/18; B23K9/00; B23K33/00
Attorney, Agent or Firm:
Muneharu Sasaki (3 outside)
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