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Selective modification of dual phase steel DP 1000 by laser action using diffractive optical element

S.P. Murzin1,2, M.V. Blokhin1

1 Samara National Research University,
443086, Samara, Russia, Moskovskoye Shosse 34,  
2 TU Wien, Institute of Production Engineering and Photonic Technologies,
1060, Vienna, Austria, Getreidemarkt 9

 PDF, 2167 kB

DOI: 10.18287/2412-6179-2019-43-5-773-779

Pages: 773-779.

Full text of article: Russian language.

Abstract:
Experimental studies of shaping a CO2 laser beam with a reflective diffractive optical element have been performed. To increase the aperture of the initial beam, we used a collimator containing a system of two plane-convex spherical ZnSe lenses. For the focal line formed with the diffractive optical element in combination with the collimator, in addition to a 1.3-fold increase in the length, a decrease in the maximum beam power density was found to occur in the laser spot. It was demonstrated that under the laser action it is possible to generate in a two-phase steel sample regions of full hardening, selective hardening, and annealing, alongside the initial structure. The formation of such structures is due to the distribution pattern of temperature fields and a difference in the cooling rate across the volume of the heat affected zone.

Keywords:
laser action, beam shaping, diffractive optical element, collimator, dual-phase steel, selective modification, structure.

Citation:
Murzin SP, Blokhin MV. Selective modification of dual phase steel DP 1000 by laser action using diffractive optical element. Computer Optics 2019; 43(5): 773-779. DOI: 10.18287/2412-6179-2019-43-5-773-779.

Acknowledgements:
The study was supported by the Russian Foundation for Basic Research, (Project No. 18-58-14001). Austrian Science Fund (FWF): Project number I 3920.

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