C-tec Constellium Technology Center

Constellium Neuf-brisach

Constellium Issoire

Bechir Chehab

Philippe Jarry

Jean-Christophe Ehrstrom

Lionel Peguet

Armelle Danielou

Pablo Lorenzino

Ravi Shahani

Marine Ledoux

Jocelyn Prigent

Carole Loable

Jochen Altenberend

The invention relates to a process for manufacturing a part, involving forming consecutive solid metal layers () that are stacked on top of one another, each layer describing a pattern defined on the basis of a numerical model {M), each layer being formed by depositing a metal (), referred to as filling metal, the filling metal being subjected to an input of energy so as to melt and constitute said layer upon solidifying, the filling metal being in the form of a powder () that is exposed to an energy beam (), resulting in melting followed by solidification such that a solid layer () is formed, the process being characterized in that the filling metal () is an aluminum alloy comprising at least the following alloying elements: —Ni, in a moiety of 1 to 6%, preferably 1 to 5.5%, more preferably 2 to 5.5%; —Cr, in a moiety of 1 to 7%, preferably 3 to 6.5%; —Zr, in a moiety of 0.5 to 4%, preferably 1 to 3%; —Fe, in a moiety of no more than 1%, preferably between 0.05 and 0.5%, more preferably between 0.1 and 0.3%; —Si, in a moiety of no more than 1%, preferably no more than 0.5%. The invention also relates to a part obtained by said process. The alloy used in the additive manufacturing process according to the invention makes it possible to obtain parts with remarkable features.

Process for manufacturing an aluminum alloy part

A method for manufacturing a partincluding a formation of successive metallic layers (), superimposed on one another, each layer being formed by the deposition of a filler metal (), the filler metal being subjected to an energy input so as to melt and constitute, when solidifying, said layer, the method being characterized in that the filler metal () is an aluminum alloy including the following alloy elements (weight %):

Method for manufacturing an aluminum alloy part

A process for manufacturing a part comprising a formation of successive metal layers, superimposed on one another, wherein each layer is formed by the deposition of a filler metal, the filler metal being subjected to an input of energy so as to melt and to constitute said layer by solidifying, the process being characterized in that the filler metal is an aluminium alloy comprising the following alloy elements (% by weight): —Fe: 2% to 8%, and preferably 2% to 6%, more preferentially 3% to 5%; —optionally Zr: 0.5% to 2.5% or 0.5% to 2% or 0.7% to 1.5%; —optionally Si: <1%, or even <0.5% or even <0.2% or even <0.05%; —optionally Cu: ≤0.5%, or even <0.2%, or even <0.05%; —optionally Mg: ≤0.2%, preferably ≤0.1%, preferably <0.05%; —optionally other alloy elements<0.1% individually and in total<0.5%; —impurities: <0.05%, or even <0.01% individually, and in total<0.15%; remainder aluminium.

Process for manufacturing an aluminium alloy part

A strip intended for the manufacture of brazed heat exchangers, having a core made of an alloy with the composition (weight %):

Strip of aluminium alloy for manufacturing brazed heat exchangers

The invention relates to a process for manufacturing a part, comprising the formation of successive solid metal layers (n) that are stacked on one another, each layer describing a pattern defined from a numerical model (M)), each layer being formed by depositing a metal (), referred to as filling metal, the filling metal being subjected to an input of energy so as to melt and form said layer by solidifying, in which process the filling metal is provided in the form of a powder (), the exposure of which to an energy beam () results in melting followed by solidification such that a solid layer (n) is formed, the process being characterized in that the filling metal () is an aluminum alloy comprising at least the following alloying elements: −2 to 10% by weight of Cr; −0 to 5% by weight, preferably 0.5 to 5% by weight, of Zr. The invention also relates to a part obtained by this process. The alloy used in the additive manufacturing process according to the invention makes it possible to obtain parts having remarkable mechanical properties, while obtaining a process that has an advantageous output.

Process for manufacturing an aluminum-chromium alloy part with superimposed successive solid metals layer

The invention relates to a process for manufacturing a part () comprising a formation of successive solid metal layers (), superimposed on one another, each layer describing a pattern defined from a numerical model (M), each layer being formed by the deposition of a metal (), referred to as a filler metal, the filer metal being subjected to an input of energy so as to melt and constitute, by solidifying, said layer, wherein the filler metal takes the form of a powder (), of which the exposure to an energy beam () results in a melting followed by a solidification in such a way as to form a solid layer (), the method being characterized in that the filler metal () is an aluminum alloy comprising at least the following alloying elements: The invention also relates to a part obtained by this method. The alloy used in the additive manufacturing method according to the invention, makes it possible to obtain parts with remarkable mechanical performance, while still obtained a method of which the productivity is advantageous.

A strip intended for the manufacture of brazed heat exchangers, having a core made of an aluminium alloy with the composition (weight %):

Aluminium alloy strip or sheet for no-flux or reduced-flux soldering

The invention relates to a process for manufacturing a part comprising a formation of successive solid metal layers () that are stacked on top of one another, each layer describing a pattern defined using a numerical model (M), each layer being formed by the deposition of a metal (), referred to as solder, the solder being subjected to an input of energy so as to start to melt and to constitute, by solidifying, said layer, wherein the solder takes the form of a powder (), the exposure of which to an energy beam () results in melting followed by solidification so as to form a solid layer (). The process is characterized in that the solder () is an aluminum alloy comprising at least the following alloy elements: &#x2014;Fe, in a weight fraction of from 1 to 3.7%, preferably from 1 to 3.6%; &#x2014;Zr and/or Hf and/or Er and/or Sc and/or Ti, in a weight fraction of from 0.5 to 4%, preferably from 1 to 4%, more preferably from 1.5 to 3.5%, even more preferably from 1.5 to 2% each, and in a weight fraction of less than or equal to 4%, preferably less than or equal to 3%, more preferably less than or equal to 2% in total; &#x2014;Si, in a weight fraction of from 0 to 4%, preferably from 0.5 to 3%; &#x2014;V, in a weight fraction of from 0 to 4%, preferably from 0.5 to 3%. The invention also relates to a part obtained by this process. The alloy used in the additive manufacturing process according to the invention makes it possible to obtain parts having remarkable features.

The present invention relates to a process for the production of an aluminium multilayer brazing sheet which comprises a core layer made of a 3xxx alloy comprising 0.1 to 0.25 wt. % Mg, a brazing layer made of a 4xxx alloy on one or both sides of the core layer, and optionally an interlayer between the core layer and the brazing layer on one or both sides of the core layer, the process comprising the successive steps of:

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Voiron, France

Bechir Chehab