Patent ID: 9458552
Filing Date: 2016-10-04
CPC Classification: B23K,C30B,F01D,F05D

Claim Text:
1. A process for a directional solidification of a weld seam during build-up welding of a substrate of a component, wherein the substrate is directionally solidified and comprises dendrites, and wherein the dendrites extend in a substrate dendrite direction, the process comprising: performing a build up welding process on a surface of the substrate by repeated application, melting, and resolidification of at least a powder material, wherein the build up welding is done according to process parameters comprising a feed rate, a laser power, a diameter of welding beam, and powder mass flow such that the process parameters lead to a local orientation of a temperature gradient on a solidification front during the process, and wherein the local orientation of the temperature gradient on the solidification front is smaller than 45° with respect to the substrate dendrite direction of the dendrites in the substrate.