Hot steel hardening liquid

Abstract

The subject of the application is a fluid for hot hardening of steel used in the hardening processes of steel products, which is characterized in that it contains: 78.5% - 91.0% (m / m) of base oil containing: I) 18.0% - 55.0% (m / m) of wax - modified lanolin with a kinematic viscosity at 40°C of 485.0 - 598.0 mm2 / s and a pour point of 2°C - 16°C and which is characterized by a distillation range such that less than 5% V / V distills up to 458°C and at least 95% V / V distills up to 645°C, II) 23.0% - 46.0% (m / m) of wax - modified jojoba oil, with a kinematic viscosity at 40°C of 20.5 - 26.5 mm2 / s and a pour point of -5°C to 3°C and which is characterized by a distillation range such that less than 5% V / V distils up to 395°C and at least 95% V / V distils up to 590°C, III) 8.0 - 42.0 (m / m), of Brightstock base oil, having a kinematic viscosity at 40°C of 470.0 - 560,0 mm2 / s and a pour point from -5°C to -12°C and which is characterized by a distillation range such that less than 5% V / V distils up to 440°C and at least 95% V / V distils up to 675°C and contains two packages of improvers in the amount of: a) 0.5% - 5.3% (m / m) of a package of improvers containing, based on the total weight of this package, 5% - 9.9% (m / m) of bis(nonylphenyl)amine and 5% - 9.9% (m / m) of sulfurized calcium salts and alkyl derivatives of phenols, mainly dodecylphenol and 0.5% - 0.99% (m / m) of tetrapropenylphenol isomers dissolved in mineral base oil, the content of which in the package is from 30% to 60% (m / m), b) 0.6% - 7.0% (m / m) of the package of refining additives containing, calculated on the total weight of this package,a mixture of 70% (m / m) hydrocarbon resins with 30% (m / m) 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 contains 2 improvers with different functions, in quantities: c) 2.0% - 6.5% (m / m) of an antioxidant additive containing, calculated on the total mass of this additive, 70% - 80% (m / m) (C8) - alkyl derivative of diphenylamine and 10% - 20% (m / m) 2,2'-thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and containing additives defined as non-hazardous, having a viscosity at 40°C in the range of 2600 - 2800 mm2 / s, d) 0.6% - 4.8% (m / m) of ash-free dispersant, mono- and / or bis-polybutenesuccinimide type, 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,