Method for joining two metal sheets respectively consisting...

B - Operations – Transporting – 23 – K

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B23K 1/19 (2006.01) B23K 9/23 (2006.01) B23K 35/24 (2006.01)

Patent

CA 2501202

A method is described for joining two sheets (1, 2) of aluminum material on the one hand and iron or titanium material on the other hand by a welding- soldering joint by using a filler, with the iron or titanium material being provided at least in the joining region with a coating preferably on the basis of zinc or aluminum before the filler is applied by forming a weld seam (4) under melting. In order to provide advantageous joining conditions it is proposed that the two sheets (1, 2) are joined in the form of a butt-joint, with the filler on the basis of aluminum being applied for the formation of the weld seam (4) on both sides of the sheet in a region bridging the joint onto the sheet (1) made of iron or titanium material in a width (b) corresponding to at least three times the thickness (d) of said sheet (1).

L'invention concerne un procédé pour joindre par soudobrasage deux tôles (1, 2) composées, d'une part, d'un matériau à base d'aluminium et, d'autre part, d'un matériau à base de fer ou de titane à l'aide d'un métal d'apport, le matériau à base de fer ou de titane étant pourvu d'un revêtement de préférence à base de zinc ou d'aluminium au moins dans la zone de jonction, avant l'application du métal d'apport servant à la formation d'un cordon de jonction (4) par fusion. L'objectif de cette invention est de parvenir à des conditions de jonction avantageuses. A cet effet, les deux tôles (1, 2) sont aboutées et le métal d'apport à base d'aluminium, servant à la formation du cordon de jonction (4), est appliqué des deux côtés des tôles dans une zone recouvrant l'aboutement sur la tôle (1) composée de matériau à base de fer ou de titane sur une largeur (b) correspondant à au moins trois fois l'épaisseur (d) de cette tôle (1).

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