Constellium Neuf-brisach

Constellium Extrusions Decin S.r.o.

C-tec Constellium Technology Center

Ravi Shahani

Bechir Chehab

Jean-Philippe Masse

Lukasz Dolega

Ivo Kolarik

Petar Ratchev

Christophe Chabriol

Jochen Altenberend

The invention relates to a thin sheet metal for a reinforcing or structural part of a car body, consisting of an aluminum alloy. The invention also relates to the method for producing such a sheet metal and to the use of such a sheet metal for producing a reinforcing or structural part for a car body. The sheet metals according to the invention advantageously have a modulus of elasticity of at least 77 GPa.

Highly rigid sheet for car body

The invention relates to a method for the laser welding of monolithic semi-finished products made from aluminium alloy, without filler wire, known to the person skilled in the art as 'remote laser welding', comprising the following steps: supplying at least two aluminium alloy semi-finished products, of which at least one is a rolled sheet of composition (wt.-%): Si: 2.5-14, preferably 2.7-5.0; Fe: 0.05-0.80, preferably 0.15-0.60; Cu: &#x2265;0.20, preferably &#x2265;0.10, also &#x3c;0.05, and even &#x3c;200, also 100 ppm; Mg: 0.05-0.80, preferably 0.20-0.40; Mn: &#x2265;0.70, preferably &#x2265;0.30; Cr: &#x3c;0.35; Ti: 0.02-0.30; Sr up to 500 ppm; Na up to 200 ppm; Sb up to 0.15%, other elements &#x3c;0.05 each and &#x3c;0.15 total, remainder aluminium, on the condition that A: 5.2 Fe+1.95 Si&#x2212;0.5 Cu&#x2212;Mg&#x2265;7.0; and welding semi-finished products made from aluminium alloy, without filler wire, a method known the person skilled in the art as 'remote laser welding'.

Method for the laser welding of monolithic semi-finished products made from aluminium alloy, without filler wire, and corresponding structural component and tailored blank

A wrought aluminium alloy product having the following chemical composition, expressed in wt %:

Free-machining wrought aluminium alloy product and manufacturing process thereof

Growing community of inventors

Voreppe, France

Ravi Shahani