文档介绍：Materials Science and Engineering A 457 (2007) 246–253
Improving welded valve quality by vibratory weld conditioning
Lu Qinghua ∗, Chen Ligong, Ni Chunzhen
Institute of Welding, School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China
Received 27 October 2006; received in revised form 5 December 2006; accepted 27 December 2006
Abstract
The aim of this study was to investigate the application of vibration during submerged arc multi-pass welding to improve the quality of full
welded valve. Cylinders of different thickness were used. The residual deformation and stress due to each pass of welding have been reduced
significantly in vibratory weld conditioning (VWC). Variations in tensile, side bend and Charpy V-notch impact properties have been documented.
Though the bend property was improved obviously by adoption of vibration, the yield strength and tensile strength of the welded joint did not
changed distinctively in VWC pared with normal welding. The results indicate that effects of vibration on impact property mechanics
plex. The enhancement of the impact property was observed in the weld metal (WM), but not in the heat-affected zone (HAZ). The results
were evaluated in terms of the weld microstructure variation. The possible solidification behaviour in VWC is discussed.
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