| 摘要 |
PURPOSE:To obtain the clad steel having excellent joining property by performing the gas shield arc welding without using a flux of the peripheral edge of the contact part of a clad material and base metal and by performing an electroslag belt-like electrode welding so as to cover the obtd. welding head. CONSTITUTION:The 1st layer bead 5 is formed by performing the gas shield arc welding which uses no flux of the contact part peripheral edge by overlap ping a clad material 1 on a base metal 2. The 1st layer bead 5 is completely covered by the 2nd layer bead 6 and 3rd layer bead 8 by performing an electroslag belt-like electrode welding twice from the above of the bead 5. The remaining shield gas and air in the gap of the face 3 to be joined of the composite thus obtd. are forcibly exhausted from the exhaust aperture which was provided on the base metal in advance and the clad material excellent in joining is obtd. by performing a hot rolling after sealing the exhaust aperture.
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