Product Code: ICAL07_P522

Laser Pressure Welding of Zn-Coated Steel and Pure Aluminum
Authors:
Koji Nishimoto, Anan National College of Technology; Anan, Tokushima Japan
Yoshihiro Okumoto, Anan National College of Technology; Anan-Shi, Tokushima Japan
Tomoki Harano, Anan National College of Technology; Anan-Shi, Tokushima Japan
Hiroo Fujii, Anan National College of Technology; Anan-Shi, Tokushima Japan
Ken Atagi, Anan National College of Technology; Anan-Shi, Tokushima Japan
Seiji Katayama, Osaka University; Osaka Japan
Presented at ICALEO 2007

Recently, combinations of dissimilar metals are desired in industrial fields such as transportation, chemical, power generation and so on. It is important for achieving desirable mechanical properties in dissimilar metals welding to prevent an excessive formation of intermetallic phases. There are advantages in laser pressure welding for joining dissimilar metals, due to the combining a laser with a roller to produce both fusion welding and pressure welding effects. In this study, laser pressure welding of Zn-coated steel and pure aluminum was carried out by changing the laser power and the roll pressure. From SEM observation and EDX analysis near the joint layer, the measured layer thickness of intermetallic compounds was about 7 μm to 20 μm. The tensile shear strength and peel strength of the laser pressure welded joint was high enough to fracture the joint from the Al parent metal when the roll pressure was 2.94 kN by the laser power of 1300W.