Title:
FLAT FILLET SUBMERGED ARC WELDING METHOD FOR STEEL PLATE
Document Type and Number:
Japanese Patent JP2978744
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a flat fillet submerged arc welding method capable of performing the full penetration welding of a steel plate whose web is up to 100mm in thickness.
SOLUTION: A double bevel groove whose groove angle is 40 to 60° is provided by using a welding steel wire containing the bond flux in which iron powder is contained by weight 15-33%, and the carbon content is regulated to ≤0.005%C, and 0.02-0.09% C. The welding is performed by setting the root length to the thickness (t) of a base metal to be 0.15 to 0.20t, the angle of inclination of a work to be 55 to 80°, the current ratio (IT2/IL2) of the current value IL2 of a preceding electrode to the current value IT2 of a succeeding electrode to be 0.65 to 1.00, the voltage ratio (VT2/VL2) of the voltage value VL2 of the preceding electrode to the voltage VT2 of the succeeding electrode to be 1.00 to 1.50, the angle of inclination of the wire of the preceding electrode to be +3 to +6°, the angle of inclination of the wire of the succeeding electrode to be -10 to -3°, and the distance between the preceding and the succeeding electrodes to be 50 to 70mm.
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Inventors:
ABE TOMOYUKI
OOTSU MINORU
OOTSU MINORU
Application Number:
JP25541795A
Publication Date:
November 15, 1999
Filing Date:
October 02, 1995
Export Citation:
Assignee:
KOBE SEIKOSHO KK
International Classes:
B23K9/18; B23K9/02; B23K33/00; B23K35/30; B23K35/362; (IPC1-7): B23K9/18; B23K9/02; B23K33/00; B23K35/30; B23K35/362
Domestic Patent References:
| JP768380A | ||||
| JP4167999A | ||||
| JP6328254A | ||||
| JP62270297A | ||||
| JP557448A | ||||
| JP2179392A | ||||
| JP4339592A |
Attorney, Agent or Firm:
Masanori Fujimaki