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Method and device for remelting and/or remelt-alloying metallic materials, in particular Nitinol

  • US 10,422,018 B2
  • Filed: 05/01/2014
  • Issued: 09/24/2019
  • Est. Priority Date: 05/17/2013
  • Status: Active Grant
First Claim
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1. A method for producing metallic semi-finished products by remelting and/or remelt-alloying of metallic materials, wherein solidification of the melt is effected by a cooling device, the method comprising:

  • selectively remelting a portion of a desired area of a material volume of an initial semi-finished product locally in a melting capillary via focused radiation;

    dissipating heat from the melting capillary via a non-remelted portion of the desired area of the material volume that is adjacent to the melting capillary;

    cooling the non-remelted portion of the desired area of the material volume, substantially simultaneously with the remelting of the portion of the desired area of the material volume by the focused radiation, via at least one heat sink in order to further dissipate the heat from the melting capillary to the non-remelted portion of the desired area of the material volume, the heat sink being cooled by a cooling liquid;

    coupling the heat sink to at least one part of at least one surface of the desired area of the material volume in a heat-conductive manner, the at least one part of the at least one surface being located close to a focus of the focused radiation on the desired area of the material volume or close to the melting capillary in the desired area of the material volume, respectively; and

    moving the focus of the focused radiation over the desired area of the material volume or moving the melting capillary through the desired area of the material volume, respectively, for successively remelting an entirety of the desired area of the material volume, wherein the focus of the focused radiation and the material volume are moved relative to one another such that the desired area of the material volume is swept over by the focus,wherein the heat sink is a clamping device made of a heat-conductive material and that engages around the initial semi-finished product, the initial semi-finished product being clamped inside of the clamping device.

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