Process optimization on TIG welding of LY12CZ aluminum alloy with hammering and rolling technique

作者：Zhao Zheng^*; Li Jinglong; Li Ming

来源：Rare Metal Materials and Engineering, 2008, 37(3): 525-529.

• LY12CZ aluminum alloy
• welding with hammering and rolling technique(HRT)
• welding defect

Aimed at the elimination of welding defects of hot cracks and welding deformation in site-welding assembly of LY12CZ aluminum alloy sheet with 2500 mmx6000 mmx2 mm, TIG welding process with Hammering and Rolling Technique (HRT) was adopted and investigated. The joint microstructures were examined, and the ultimate strength and residual stress of the joints were measured in comparison with the normal TIG welding. The results show that HRT effectively relaxes the residual stresses of the joint and reduces the welding deformation. The optimized HRT parameters enable the hammering and rolling process to well match with the welding pool solidification, resulting in preventing LY12CZ aluminum alloy sheet from hot cracking.

• 出版日期2008-3
• 单位西北工业大学; 哈尔滨工业大学