Laser drilling process of Fe₇₈Si₉B₁₃ amorphous alloy foil

Abstract

The research on laser drilling of amorphous foils can promote the application of amorphous alloy in micro-machining. In this article, the effects of current, pulse width and defocusing amount on the quality of machined hole on Fe₇₈Si₉B₁₃ amorphous alloy foils were analyzed by controlling the laser parameters. The experimental results showed that the hole diameter, remelting area (RMA) thickness and heat affected zone (HAZ) thickness increased obviously with the increase of current and pulse width. But high current caused serious erosion near the entrance of the hole and the taper of the machined holes increased with increasing pulse width. When the defocusing amount was 0, the hole diameter was the smallest and the forming quality of the machined hole was the best. Every parameter needs to be adjusted and coordinated to improve the quality of laser drilling.

Keywords:

• Laser drilling
• amorphous alloy
• current
• pulse width
• defocusing amount

Additional information

Funding

The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 51875126 and No. 51505101) and China Postdoctoral Science Foundation (No. 2017T100238).