Hardening oil for cold heat treatment of steel

Abstract

The application concerns a hardening oil for cold heat treatment of steel used in hardening processes, containing: 85.4% - 94.8% (m / m) of jojoba wax-oil, with a kinematic viscosity at 40°C of 20.4 - 27.5 mm2 / s and a pour point of 5°C - 10°C, said jojoba oil being characterized by a distillation range such that less than 5% V / V distils up to 398°C and at least 95% V / V distils up to 595°C, also containing two packages of refining additives in the amount of: a) 1% - 6% (m / m) of a package of refining additives containing, calculated on the total weight of this package, 10% - 25% (m / m) of bis(nonylphenyl)amine and 1% - 5% (m / m) of salt calcium (C10 — C47)-alkyl-aryl derivatives of petroleum benzenesulfonic acids and 0.1% - 0.25% (m / m) diphenylamine and 0.01% - 0.25% (m / m) branched dodecylphenol, dissolved in mineral base oil, the content of which in the package is from 20% to 50% (m / m).b) 0.8% - 8% (m / m) of a package of improvers containing, based on the total weight of this package, a mixture of 70% (m / m) of hydrocarbon resins with 30% (m / m) of non-aromatic hydrocarbons obtained from vacuum residue after distillation of crude oil or by separating raffinate - oil in the process of deasphalting of vacuum residue, and additionally containing 2 improvers with different functions, in the amounts of: c) 0.1% - 3% (m / m) of an ash-free dispersant, type of mono- and / or bis-polybutenesuccinimides, with a base number of not more than 18 mg KOH / g and a viscosity at 100°C of not more than 330 mm2 / s. d) 0.1% - 2% (m / m) of viscosity modifier - polymer of acrylic acid and methacrylic acid esters with (C1 — C18) aliphatic alcohols, dissolved in mineral base oil and with the viscosity of the entire mixture at 100°C in the range from 660 mm2 / s to 980 mm2 / s.