Brazing method and corresponding device

B - Operations – Transporting – 23 – K

Patent

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Details

B23K 3/08 (2006.01)

Patent

CA 2671087

The present invention relates to a method of brazing two materials (1, 2) together using a filler metal (3), which comprises the following steps: the filler metal is placed between the two contacting materials in a brazing zone where they are intended to be joined; on at least one of the two materials, which is mounted so as to move, a stress force is exerted along each of the directions of expansion provided for the two materials; the assembly in the brazing zone is brought to what is called a brazing temperature, which is both above the melting point of the filler metal and below the melting point of each of the two materials; during the temperature rise, the forces exerted on the materials to be assembled are gradually reduced as said materials expand, so that there is substantially no longer a force exerted on the materials when the brazing temperature is reached; and, once the filler metal has melted and wetted each material to be assembled, the assembly is cooled so as to solidify the filler metal, which therefore provides a bond between the two materials. The invention also relates to a device for implementing said method.

La présente invention se rapporte à un Procédé de brasage de deux matériaux (1, 2) entre eux à l'aide d'un métal d'apport (3) comprenant les étapes visant à : placer le métal d'apport entre les deux matériaux en contact au niveau d'une zone de brasure où ceux-ci sont destinés à être liés, exercer sur au moins l'un des deux matériaux monté mobile un effort de contrainte selon chacune des directions de dilatation prévue pour les deux matériaux, amener l'ensemble au niveau de la zone de brasure à une température dite de brasage à la fois supérieure à la température de fusion du métal d'apport et inférieure à la température de fusion de chacun des deux matériaux. lors de la montée en température, diminuer progressivement les efforts exercés sur les matériaux à assembler au fur et à mesure de la dilation desdits matériaux de manière à ce que sensiblement aucun effort ne s'exerce plus sur les matériaux lorsque la température de brasage est atteinte. une fois le métal d'apport fondu et mouillant chaque matériaux à assembler, refroidir l'ensemble de manière à solidifier le métal d'apport qui assure alors une liaison entre les deux matériaux, ainsi qu'à un dispositif pour la mise en AEuvre dudit procédé.

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