关键词: 振动焊接, 残余应力, 冲击吸收功, 金相组织

Abstract:

The contrast tests of vibratory submerged-arc welding and normal SAW(submerged arc welding) on the valve steel A105 was carried out.The welding deformation and residual stress are decreased evidently.The dimensional stability and service security of the welding structure are increased obviously.The impact absorbing energy of weld is improved by 21% under vibratory weld conditioning. And the effect of mechanical vibration on the impact absorbing energy of weld is greater than that of HAZ(heat affected zone).The results also indicate that the microstructure of the weld and HAZ are refined distinctly. The fusion area and overheated zone are narrowed. And the dimension of Widmanstaten structure minishes or disappeares.

Key words: vibratory welding, residual stress, impact absorbing energy, microstructure