Plasma Polishing and Finishing of CVD-Diamond Coated WC (Co) Dies for Dry Stamping

摘要: Abstract The CVD-diamond coated WC (Co) dies have been high-lighted as a tool to make dry stamping of stainless sheets, aluminium alloys and cold-rolled steel sheets. bare film had higher roughness with steep asperities than 1.5 Rz so that the friction coefficient became 0.3 0.5. These rough diamond crystals ploughed worn counter material surface. Manual mechanical polishing processes by using powders oxidizers required for long, tedious time; in addition, curved surfaces die shoulders are difficult be homogeneously polished finished. On other hand, nano-optical was only effective remove nano-sized residuals on surfaces. In present paper, plasma oxidation finishing process proposed non-traditional method reduce original maximum surface down 0.1 µm or less than. plasma-density intensifying device designed used control sheath films toward homogeneous large area. Two types test-pieces were prepared experiments; e.g., diamond-coated flat (Co). former specimen employed prove low wearing state should preserved tribo-testing. latter one demonstrate deep-drawing