Simultaneous Nano-Texturing onto a CVD-Diamond Coated Piercing Punch with Femtosecond Laser Trimming

Applied Sciences

Tomomi Shiratori¹  Yoshihiro Kira¹  Tadahiko Inohara²  Tatsuhiko Aizawa³ 

[1] Faculty of Engineering, University of Toyama, Toyama 939-8202, Japan;LPS-Works, Co., Ltd., Tokyo 144-0033, Japan;Surface Engineering Design Laboratory, SIT, Tokyo 144-0045, Japan;

关键词: diamond-coated WC (Co) punch;    femtosecond laser trimming;    simultaneous nanotexturing;    fine piercing;    concurrent transcription of nanotextures;    surface plasmon;   

DOI  :  10.3390/app10082674

来源: DOAJ

【 摘 要 】

In this study, a CVD (Chemical Vapor Deposition)-diamond coated tungsten carbide cobalt (WC (Co)) punch was trimmed to adjust its surface roughness and to significantly reduce its edge curvature for fine piercing by femtosecond laser processing. Through this laser trimming, the surface quality of the diamond coating and the punch edge profile were improved to less than 0.5 μm at the maximum roughness and 2 μm in the edge width, respectively. In parallel with this improvement of surface quality, the side surface of the diamond coating was modified to include nano-textures via the LIPSS (Laser Induced Periodic Surface Structuring) process. Through the fine piercing process, this nanotexture was transcribed onto the pierced hole surface together with fine shearing of the hole by piercing. WLI (White-Light Interferometry) and SEM (Scanning Electron Microscopy) were utilized to describe this transcription of nanotextures during the piercing process. These semiregular nanotextures with an LIPSS period of 300 nm on the pierced hole surface induced a blue colored surface plasmon.

【 授权许可】

Unknown