OIL FOR STEEL THERMAL TREATMENT

摘要

The invention relates to an oil for the thermal treatment of steels. According to the invention, the oil comprises 91...99.75% naphthenic or paraffinous mineral oils or mixtures thereof having a viscosity of 15...500 cSt at 40 degree C additivated with 0.1...1% oxidation-preventive agent of the screened phenol-type, 0.1...2% oxidation-preventive agent of the alkylated secondary aromatic amines-type and at most 3% surface-active substances of the type of fatty acids with 12...20 carbon atoms ethoxylated with 3...8 moles of ethylene oxyde and/or of nonylphenols ethoxylated with 3...8 moles of ethylene oxyde, the percentage being expressed by weight.