A Study on the High-Efficiency Cutting of Austenitic Stainless Steel Using an HfN-Type Coated Tool

Abstract

In this study, a TiN/HfN-coated tool (THN-HF(L)) was developed to improve the processing efficiency of machining austenitic stainless steel. Using scratch tests, this tool was compared with other film-coated tools, and its critical load showed the highest value. The THN-HF(L) tool, whose film was formed in the low bias voltage condition, has a longer tool life than conventional tools. In high-speed cutting (4 or 5 m/s), its tool life is over 20 km. Even though the THN-HF(L) tool's cutting distance surpasses that of conventional tools, adhesion is controlled, and flaking of the film coating on the cutting edge is not observed.

Keywords

• tin/hfn type coated tool
• high efficiency cutting
• wear resistance
• austenitic stainless steel
• adhesion
• cutting temperature