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1. (WO2017154669) METHOD AND DEVICE FOR LASER CUTTING STAINLESS STEEL SHEET

Pub. No.:    WO/2017/154669    International Application No.:    PCT/JP2017/007790
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Wed Mar 01 00:59:59 CET 2017
IPC: B23K 26/38
B23K 26/14
Applicants: AMADA HOLDINGS CO.,LTD.
株式会社アマダホールディングス
Inventors: SUGIYAMA Akihiko
杉山 明彦
WAKUI Hirotada
湧井 宗忠
MIZOGUCHI Yuuya
溝口 祐也
KUNIHIRO Masato
國廣 正人
NAGASE Ayako
長▲瀬▼ 絢子
Title: METHOD AND DEVICE FOR LASER CUTTING STAINLESS STEEL SHEET
Abstract:
In this method for laser cutting a stainless steel sheet using a fibre laser or a direct diode laser, when a mixed gas of nitrogen gas and air is used as an assist gas, the oxygen concentration in the assist gas is adjusted to 0.06-0.5%. The oxygen concentration in the assist gas is more preferably adjusted to 0.1-0.3%. As a result of adjusting the oxygen concentration in the assist gas as described above, dross-free laser cutting can be achieved.