Parametric Study On The CW Nd: YAG Laser Cutting Quality Of 1.25 mm Ultra Low Carbon Steel Sheets Using O2 Assist Gas

Journal Article · Wed Feb 14 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2711110· OSTI ID:21054897

Salem, Hanadi G ^[1]; Abbas, Wafaa A; Mansour, Mohy S; Badr, Yehia A ^[2]

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1. Department of Mechanical Engineering, American University in Cairo (Egypt)
2. National Institute of Laser Enhanced Science, NILES, Cairo University (Egypt)

There are many non-linear interaction factors responsible for the performance of the laser cutting process. Identification of the dominant factors that significantly affect the cut quality is important. In the current research, the gas pressure, laser power and scanning speed were selected as the cutting parameters. Effect of the cutting parameters on the cut quality was investigated, by monitoring the variation in hardness, oxide layer width and microstructural changes within the heat affected zone (HAZ). Results revealed that good quality cuts can be produced in ultra low carbon steel thin sheets, using CW Nd:YAG laser at a window of scanning speed ranging from 1100-1500 mm/min at a minimum heat input of 337watts under an assisting O2 gas pressure of 5 bar. Higher laser power resulted in either strengthening or softening in the HAZ surrounding the cut kerf. The oxide layer width is not affected by the energy density input but rather affected by the O2 gas pressure due to exothermal reaction.

• OSTI ID: 21054897
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 888; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON STEELS
CUTTING
ENERGY DENSITY
HARDNESS
HEAT AFFECTED ZONE
LASER BEAM MACHINING
LASER RADIATION
LAYERS
MICROSTRUCTURE
NEODYMIUM LASERS
NONLINEAR PROBLEMS
OXIDES
OXYGEN
PARAMETRIC ANALYSIS
PERFORMANCE
VARIATIONS