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Technologieorientierte Software zur offline-Prozeßoptimierung beim Laserhärten von Eisenwerkstoffen - Personalcomputerprogramm GEOPT. Forschungsbericht im Rahmen des Verbundprojektes "Oberflächenbearbeitung mit CO2-Lasern". Förderkennzeichen 13N5949A

: Lepski, D.
: Fraunhofer-Institut für Werkstoffphysik und Schichttechnologie -IWS-, Dresden; Bundesministerium für Forschung und Technologie -BMFT-, Bonn

Bonn, 1993
Forschungsbericht - Bundesministerium für Forschung und Technologie
Fraunhofer IWS ()
Bauteilgeometriemodell; Eisenwerkstoff; hardness calculation; Härteberechnung; iron base material; Laser-Leistungsdichteverteilung; laser transformation hardening; Laser-Umwandlungshärtung; optimization of processing; power density distribution; Prozeßoptimierung; temperature field calculation; Temperaturfeldberechnung; transformation kinetics; Umwandlungskinetik; workpiece geometry model

For solid state surface hardening the interrelations between processing parameters on the one hand and selected temperature field and hardening zone geometry parameters on the other hand have been calculated by solving the heat diffusion equation, using Greens functions, and stored into a data base. Calculations have been performed for a large number of power density distributions and three models of the workpiece geometry (infinite halfspace, thin plate, rectangular edge). Using this data base the personal computer program GEOPT determines and optimizes within about one second those values of the processing parameters which fulfill a user defined set of conditions for the laser induced temperature field (e. g. maximum surface temperature, cooling rate) and/or the hardening and annealing zone geometry. Beam shaping by integrators or beam scanning may be accounted for. The possibilities of application (check for realizability and economical efficiency, determination and optimization of processing parameters, calculation of results) and the effect of some sources of error (wrong material data etc.) are discussed and several examples of applications are given. As an appendix, the report contains the complete manual of the program.