硫化油脂添加油を用いたステンレス鋼のMQL切削

－水ミストとの併用効果－

抄録

This paper describes effect of combination of MQL and water mist supply on cutting load in stainless steel cutting when adding polysulfide to MQL lubricant. Generally, it is considered that the largest effect of combination use of water-mist on cutting performance is a chilling effect. However, addition of polysulfide to MQL lubricant as additive exhibited excellent lubricity in stainless steel heavy drilling if applying combination use of water-mist. From the friction tests under some lubricating conditions, it is suggested that existence of water in heated cutting zone can alter the oxidation state of stainless steel surface and then enhance forming reaction layers of polysulfide on the surface.