Method for manufacturing single crystal structures

摘要

Producing single crystal structures, parts or workpieces of superalloys on substrates with one or more single crystal structures comprises: (a) melting the substrate surface with an energy beam; (b) supplying the molten region with material which is to be introduced into the single crystal structure; (c) completely melting the supplied material; and (d) regulating and/or controlling the energy supply such that the solidification velocity and temperature gradient lie in the dendritic crystalline region outside the globulitic region in the GV (gradient velocity) diagram. The supplied material may be the same as the substrate material or may be a different material having a similar crystal structure, preferably a Co, Fe or Ni base superalloy such as CMSX-4.