METHOD FOR INFLUENCING THE MICROSTRUCTURE OF AN ADDITIONAL MATERIAL APPLIED TO A SUBSTRATE OR AT LEAST ONE PREVIOUSLY APPLIED LAYER OF THE ADDITIONAL MATERIAL DURING LASER DEPOSITION WELDING AND/OR AVOIDANCE OF BOUNDARY ZONE EMBRITTLEMENT IN THE APPLIED MATERIAL

摘要

Method for influencing the microstructure of a filler material structure of a filler material, which occurs in layered laser deposition welding on a substrate or at least one already applied layer of the filler material and / or the avoidance of edge zone embrittlement of filler material applied in the process Surface applied and directed to the already solidified filler metal a cryogenic gas alone or a cryogenic gas with a gas as a gas mixture. A cryogenic gas or a gas mixture can also be directed onto the surface during machining on surfaces of layers. The size of the surface irradiated with the cryogenic gas or gas mixture and / or the volume flow used is determined depending on the current temperature difference between the substrate material and the filler material of a layer formed on the substrate surface or depending on the current temperature difference between the filler material applied last and already solidified filler metal can be regulated at least one previously applied layer.