抄録
The residual stresses, mechanical properties and microstructures of welded A516 GR 70 plate steels with shield metal arc welding processes were investigated for three welding techniques: 1) full bead, 2) full bead with post weld heat treatment and 3) half bead temper welding. From tensile tests, all specimens of the three welding techniques ruptured at base metal area. The tensile strength of full bead and half bead temper welded specimens are close and higher than that of the full bead with post weld heat treatment specimen. The impact property of Heat Affected Zone (HAZ) of half bead temper welding technique is much higher than those of the other two techniques. The half bead temper welding reduces the residual stress along the weld direction in the weld bead and in the base metal, while it does not reduce the residual stress in the HAZ. In the plane across of the weld, the half bead temper welding does not reduce the residual stress in any of the three areas.
