[11p-A24-1~6] 3.6 Laser processing

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[11p-A24-1] Open-air metal surface nitriding process utilizing laser-induced plasma

〇Naofumi Ohtsu¹, Madoka Tachibana¹, Eishi Hashiba¹, Kazuma Numakura¹, Mitsuhiro Hirano¹ (1.Kitami Inst. Tech.)

Keywords:

Nitriding process,Laser-induced plasma,Open air

When a focused nanosecond pulsed laser is irradiated onto a metal surface, laser-induced plasma is generated on the surface. This plasma instantaneously melts the metal surface, which then solidifies after incorporating ambient gas into the molten pool. When the laser irradiation is performed in air, a new surface layer containing atmospheric components, mainly nitrogen, can be formed directly on the surface. In this presentation, we introduce a case study in which a nitrided layer several micrometers thick was formed on a titanium surface under atmospheric conditions.