A Key Processing Technology of Welded Steel Tube for High-Strength Automotive Drive Shaft

High-strength steel has a promising application due to vehicle mass reduction requirement while the high springback of forming and welding processes limits its application. Bending control and welding processes of ZQS700Z welded tube for automotive drive shaft are studied and the key processing technology is obtained. Weld microstructure analysis and flattening/flaring tests are performed and good performances are obtained.