L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Air Liquide Welding France

Hakim Maazaoui

Karim Chouf

Francis Briand

Thomas Jouanneau

Eric Verna

Isabelle Debecker

Françis Briand

Gaia Ballerini

The invention relates to a laser cutting method for cutting a stainless steel workpiece using laser beam generation means comprising a silica fiber with an ytterbium-doped core to generate the laser beam. Preferably, the laser beam generated by the ytterbium-based fiber has a wavelength between 1.07 and 1.09 &#x3bc;m, a quality factor of the laser beam is between 0.33 and 8 mm&#xb7;mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon and mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from O, CO, Hand CH.

Method for cutting stainless steel with a fiber laser

The invention relates to a laser cutting method for cutting a C&#x2014;Mn steel workpiece, characterized in that laser beam generation means comprising at least one silica fiber with an ytterbium-doped core is used to generate the laser beam. Preferably, the ytterbium-based fiber has a wavelength between 1.07 and 1.1 &#x3bc;m, preferably 1.07 &#x3bc;m, the quality factor of the laser beam is between 0.33 and 8 mm.mrad, and the laser beam has a power of between 0.1 and 25 kW. The assistance gas for the laser beam is chosen from nitrogen, helium, argon, oxygen, COand mixtures thereof, and, optionally, it further contains one or more additional compounds chosen from Hand CH.

Method for cutting C&#x2014;Mn steel with a fiber laser

The invention relates to method for cutting a part using a laser beam, involving the use of laser beam generation means comprising at least one ytterbium-based fibre having a wavelength of between 1 and 4 &#x3bc;m in order to generate the laser beam. The laser beam is selected to have a power of less than 100 kW, a power density of at least 1 MW/cm2, a focused beam diameter of at least 0.1 mm and a quality factor (BPP) of less than 10 mm&#xb7;mrad.

Cutting method using a laser having at least one ytterbium-based fiber, in which at least the power of the laser source, the diameter of the focused beam and the beam quality factor are controlled

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Hakim Maazaoui