Method for manufacturing single crystal structures

摘要

Method of producing single crystal superalloy structures, parts or workpieces on single crystal substrates involves: (a) melting the substrate surface with an energy beam; (b) supplying the molten region with material which is to be formed as a single crystal structure; (c) completely melting the supplied material; and (d) regulating and/or controlling the energy supply such that the solidification velocity and the temperature gradient in the shown GV diagram lies in the dendritic crystalline region outside the globular region. Preferably, the substrate and/or the supplied material consists of a Co base, Fe base or Ni base superalloy such as CMSX-4.