| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for bonding dissimilar metals by which a dissimilar metal welded joint (a dissimilar metal joint part) having high bonding strength can be obtained by preventing "molten metal separation" when applying TIG welding to the dissimilar metal bonding of an aluminum alloy material and a steel material. <P>SOLUTION: In the bonding of the aluminum alloy material (11) to the steel material (12) by TIG welding, a tungsten electrode (1) which has a tip having a diagonally cut tip face (2) to the electrode center axis (6) is used. The tungsten electrode (1) is oriented toward the welding line from the upper side of the aluminum alloy material (11) in such a manner that the tip face side of the tungsten electrode (1) faces the aluminum alloy material (11) side and the tip (2a) of the tip face (2) faces the steel material (12) side. In this manner, an arc (3) from the tip (2a) is directed to the steel material (12) side. <P>COPYRIGHT: (C)2012,JPO&INPIT |
