Steel-aluminum welded material and method of fabricating the...

B - Operations – Transporting – 23 – K

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B23K 11/20 (2006.01)

Patent

CA 2563282

The purpose is to provide a joined body of dissimilar materials comprising steel material and aluminum material, which can be obtained by spot welding with high joining strength; and a spot welding method therefor. A joined body (3) is obtained by spot welding a particular thick steel material (1) and an aluminum material (2). The area of a nugget (5) in a spot weld is determined in relation to the plate thickness of the aluminum material (2). The area of the portion of a boundary reaction layer (6) having a thickness of 0.5-10 µm in the nugget (5) is determined in relation to the plate thickness of the aluminum material (2), and high joining strength is obtained.

Le but est de proposer un corps assemblé de matériaux différents comprenant un matériau en acier et un matériau en aluminium, qui peut être obtenu par soudage par points avec une grande force d'assemblage ; et un procédé de soudage par points pour celui-ci. Un corps assemblé (3) est obtenu en soudant par points un matériau particulier en acier épais (1) et un matériau en aluminium (2). La zone d'un noyau (5) dans un soudage par points est déterminée par rapport à l'épaisseur de la plaque de matériau en aluminium (2). La zone de la partie d'une couche limite de réaction (6) ayant une épaisseur de 0,5 à 10 µm dans le noyau (5) est déterminée par rapport à l'épaisseur de la plaque du matériau en aluminium (2), et une grande force d'assemblage est obtenue.

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