Quench oils, concentrates for making quench oils and methods of treating metals

摘要

An improved quench oil for use in heat treating ferro-metals comprising a major amount of mineral oil containing (a) an ashless dispersant (e.g. alkenyl succinimide, alkenyl succinic ester, alkenyl succinic ester-amide or alkylphenolformaldehyde-amine Mannich condensate), (b) an alkaline earth or an alkali metal detergent (e.g. calcium aryl sulfonate, calcium phosphonate phenate), and (c) an ashless antioxidant (e.g. alkylated diphenylamine, sterically hindered phenols or sulfurized alkylphenols).