Elimination of striation in laser cutting of mild steel

High-power laser cutting is extensively used in many industrial applications. An important weakness of this process is the formation of striations (regular lines down the cut surface), which affect the quality of the surfaces produced. The elimination of striation formation is of considerable import...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2007-11, Vol.40 (22), p.6908-6916
Main Authors: Sobih, M, Crouse, P L, Li, L
Format: Article
Language:English
Subjects:
Applied sciences
Blanking. Shearing
Cutting
Exact sciences and technology
Metals. Metallurgy
Production techniques
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Summary:High-power laser cutting is extensively used in many industrial applications. An important weakness of this process is the formation of striations (regular lines down the cut surface), which affect the quality of the surfaces produced. The elimination of striation formation is of considerable importance, since it could open up a variety of novel high-precision applications. This study presents the results of oxygen-assisted laser cutting of EN43 mild steel sheets, using a high-power fibre laser. Striation-free laser cuts are demonstrated for cutting 1 and 2 mm thick mild steel sheets. The optimal operating windows are presented and a mathematical method is proposed to estimate the critical speed at which striation-free cut can be obtained.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/40/22/009