FIELD: metal processing.
SUBSTANCE: invention relates to welding, particularly submerged arc welding of steel plates. Welding of first wire electrode located ahead in direction of welding with wire diameter 2.0-3.2 mm is performed with current density of not less than 145 A/mm2, and second and next electrodes are placed behind first electrode on he welding line, groove of welded joint between welding steel plates is formed with two-stage shape, which satisfies condition θB < θT, where θB is angle between sides of lower step of groove, while θT is angle between sides of upper step of grooves.
EFFECT: higher hardness in welding zone with feed of small amount of heat and obtaining large depth of penetration and large width of seam, reduced height of reinforcing seam due to prevention of excessive melting wire.
10 cl, 5 dwg
| Title |
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