Open AccessParameterization of the characteristics of the melt pool using the video diagnostics of the laser metal deposition process
Author(s) -
Yuri N. Zavalov,
A. V. Dubrov,
E. S. Makarova
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1713/1/012048
Subject(s) - materials science , deposition (geology) , volume (thermodynamics) , range (aeronautics) , coaxial , volumetric flow rate , laser , flow (mathematics) , optics , analytical chemistry (journal) , mechanics , composite material , chemistry , thermodynamics , physics , geology , paleontology , engineering , chromatography , sediment , electrical engineering
The dependences of the geometric characteristics of the melt bath on the scanning velocity and radiation power during laser metal deposition (LMD) are shown. The data were obtained experimentally at different values of the intensity Is up to 60 kW/cm2 in the range of changes in the specific energy per unit surface area Es (20…60) j/mm2 using the high-speed video camera installed in coaxial scheme. A powder (40…100) microns of PR-Kh18N9 austenitic steel with a mass flow rate of 8.4 g/min was used. It is found that the length of the melt pool L increases with the growth of Is and practically does not depend on the scanning velocity in the range (5…10) mm/s. The melt volume is estimated taking into account the measured track height. At the same velocity, the volume of the melt increases with the value of the Is exceeding the threshold. The value of threshold increases with increasing velocity. The volume of the melt increases with the specific energy Es . The relationship between the geometric characteristics of the melt bath and the shape of the track formed in the LMD process is shown.