Nitrogen Supersaturation into AISI420 Mold for Precise Machining

The plasma nitriding conditions and processing parameters were controlled to attain the high-density nitrogen ion NH-radical populations form supersaturated layer into AISI420 type martensitic stainless steel mold substrate at 673 K for 14.4 ks 28.8 ks. Thicker nitrided than 80 mm was attained fine machining of optical diffraction elements onto this surface. average hardness in reached 1400 HV. After testing microstructure analysis, machinability test performed describe ductile mode cutting behavior nitrogen-supersaturated work by using PCD (Poly-Crystalline Diamond)-chip tool. Higher solute content 4 mass% responsible turning PCD-chip CVD (Chemical Vapor Deposition)-diamond coated tools without any damages precisely finishing surface with lower maximum roughness 10 nm on machined low homogeneous profile proved that series adaptive as a stamping chalcogenide glasses high dimensional accuracy demolding capacity.