TIG welding-brazing of aluminum to stainless steel joint with hot wire
High frequency induction hot wire technology was first proposed in TIG welding-brazing of aluminum-stainless steel dissimilar metals for reducing heat input and controlling intermetallic compound (IMC) growth. Comparing with the welding current of 110 A using aluminum cold filler wire, only 85 A welding current with hot filler wire of 400 °C was needed for good joint formation. Results of mechanical tests showed that significant improvements in stability and average value of tensile strength were obtained with hot filler wire. The interface temperature distributions during TIG welding-brazing processes with cold and hot filler wire were computed by MARC finite element method (FEM) and verified by thermocouple temperature measuring system, separately. Obvious declines of peak temperature and reaction time in the interface were observed with hot filler wire and smaller welding current. Investigation results of SEM, EDS, TEM and XRD on microstructures of interfaces suggested that hot filler wire with the smaller welding current decreased the thickness of IMC layer of Al13Fe4. The relationship among the temperature field,microstructures and properties of the joints was well established.
TIG welding-brazing aluminum alloy stainless steel hot filler wire high frequency induction temperature field intermetallics
Huan He Sanbao Lin Chunli Yang Chenglei Fan Kang Peng
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, No. 92 West Da-Zhi Street, Harbin 150001, PR China
国际会议
济南
英文
1-16
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）