スーパー二相ステンレス鋼を対象としたコーテッド超硬工具の切削性能に関する研究

-切削速度の違いが工具損傷に及ぼす影響-

抄録

Super duplex stainless steel, which is one of the difficult-to-cut materials to machine, is excellent in toughness at room temperature and corrosion resistance. It is used in many applications, such as marine structure and petrochemical plant. However, this stainless steel has certain material characteristics, such as low thermal conductivity, a high work-hardening rate, and a high affinity to tools. In this study, the cutting performance of coated cemented carbide tool is in finish turning with super duplex stainless steel. As a result, the tool life and surface roughness are improved with using TiAlN/AlCrN super multi-layer coated tool. And the superior surface roughness is also obtained. Furthermore, this tool clarified that increased tool wear rate when flaking of the cutting edge causes by the oxidation of the tool at more than cutting speed 2.0m/s.