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CN-121992174-A - Quenching oil composition and preparation method thereof

CN121992174ACN 121992174 ACN121992174 ACN 121992174ACN-121992174-A

Abstract

The invention relates to the technical field of quenching oil, in particular to a quenching oil composition and a preparation method thereof, wherein the quenching oil composition comprises base oil, a composite cooling agent, a high-temperature antioxidant, a brightening agent and an antirust agent; the invention realizes the breakthrough promotion of the comprehensive performance of the quenching oil through the integral synergy of component selection, proportion optimization and preparation process, and thoroughly solves the problem that the prior art is difficult to consider the requirements in multiple aspects. The balanced cooling performance ensures that the workpiece has uniform hardness and no crack deformation after quenching, the excellent high-temperature oxidation resistance prolongs the service life of the oil product, reduces the replacement frequency and the production cost, and the reliable rust prevention and brightness performance ensures the surface quality of the workpiece without additional polishing or rust prevention treatment.

Inventors

  • WU JINGLANG
  • FANG CHENG
  • ZHAO SHANGXIAN

Assignees

  • 黄山钛可磨工业介质有限公司

Dates

Publication Date
20260508
Application Date
20260227

Claims (10)

  1. 1. The quenching oil composition is characterized by comprising, by weight, 70-85 parts of base oil, 5-10 parts of a composite cooling agent, 1-3 parts of a high-temperature antioxidant, 0.5-2 parts of a brightening agent and 1-3 parts of an antirust agent.
  2. 2. The quench oil composition of claim 1, wherein the base oil is a paraffinic base oil.
  3. 3. The quenching oil composition according to claim 1, wherein the brightening agent is sodium petroleum sulfonate, and the active matter content of the sodium petroleum sulfonate is not less than 90% and the moisture is not more than 0.5%.
  4. 4. The quenching oil composition according to claim 1, wherein the rust inhibitor is dodecenyl succinic acid, and the dodecenyl succinic acid has an acid value of 190-210mgKOH/g and a purity of not less than 98%.
  5. 5. The quenching oil composition as claimed in claim 1, wherein the composite catalyst consists of dibenzyl toluene serving as a high-temperature catalyst and dodecylbenzene serving as a low-temperature catalyst in a mass ratio of 5:3.
  6. 6. The quenching oil composition of claim 1, wherein the high temperature antioxidant is a nano montmorillonite-loaded modified diphenylamine-hindered phenol compound, wherein the mass ratio of diphenylamine to hindered phenol is 3:2, and the loading of nano montmorillonite is 8-12% of the total mass of the compound.
  7. 7. The quenching oil composition as claimed in claim 6, wherein the hindered phenol is 2, 4-dimethyl-6-tert-butylphenol.
  8. 8. A method for preparing a quenching oil composition according to any one of claims 1-7, comprising the steps of: S1, preparing a high-temperature antioxidant, namely adding sodium montmorillonite, adding a coupling agent accounting for 2-3% of the mass of the sodium montmorillonite, stirring and preprocessing for 1.5-2 hours at 70-80 ℃, cooling, filtering and drying to obtain modified nano montmorillonite, weighing diphenylamine and 2, 4-dimethyl-6-tert-butylphenol according to the mass ratio of 3:2, adding the diphenylamine and the 2, 4-dimethyl-6-tert-butylphenol into a reaction kettle, heating to 120-130 ℃, stirring until the materials are completely dissolved to form a mixed system, adding the modified nano montmorillonite into the mixed system, heating to 160-170 ℃ under the protection of inert atmosphere, preserving heat and reacting for 3-4 hours, controlling the stirring rate to be 400-500r/min in the reaction process, and naturally cooling to room temperature after the reaction is finished to obtain the high-temperature antioxidant; S2, weighing raw materials, namely weighing base oil, a composite cooling agent, a high-temperature antioxidant, a brightening agent and an antirust agent according to parts by weight; And S3, mixing and preparing, namely heating the base oil weighed in the step S2 to 40-60 ℃, adding the composite catalyst at a stirring rate of 300-500r/min, stirring for 5-6min, adding the high-temperature antioxidant, stirring for 3-4min, adding the brightening agent, stirring for 3-4min, adding the antirust agent, stirring for 3-4min, uniformly mixing, and cooling to room temperature to obtain the quenching oil composition.
  9. 9. The process of claim 8, wherein the coupling agent in S1 is gamma-aminopropyl triethoxysilane.
  10. 10. The process of claim 8, wherein the inert atmosphere in S1 is nitrogen.

Description

Quenching oil composition and preparation method thereof Technical Field The invention relates to the technical field of quenching oil, in particular to a quenching oil composition and a preparation method thereof. Background In the fields of machine manufacturing, automobile part processing, engineering mechanical equipment production and the like, quenching treatment is a core process for improving the hardness, strength and wear resistance of a metal workpiece, and quenching oil is used as a key medium in the quenching process, and the performance of the quenching oil directly determines the heat treatment quality and the subsequent use reliability of the workpiece. In industrial production, the core requirements for quenching oil are concentrated on three aspects, namely balanced cooling performance, quick cooling at a high temperature stage to ensure that the phase change of a workpiece is sufficient, slow cooling at a low temperature stage to release internal stress to avoid cracks and deformation, strong high-temperature stability, difficult oxidation degradation and abnormal viscosity change when the quenching oil is used for a long time under the working condition of more than 150 ℃, good surface protection effect, capability of reducing the generation of oxide skin after the quenching of the workpiece, ensuring the surface brightness, providing long-term rust prevention protection and avoiding rust in the storage or turnover process of the workpiece. However, the quenching oil in the prior art still has a plurality of practical application problems that in the aspect of cooling performance, most products adopt a single type of cooling agent, or the high-temperature cooling speed is insufficient to cause low standard reaching rate of workpiece hardness, or the low-temperature cooling is too fast to cause internal stress concentration, the rejection rate of workpiece cracks is high, and in the aspect of antioxidation, the traditional antioxidant is easy to agglomerate and poor in dispersibility at high temperature to cause the acid value to rise and the viscosity to increase after the oil is used for thousands of hours, so that the production cost and the downtime are increased. Therefore, development of a quenching oil composition which can realize cooling balance, high-temperature oxidation resistance, rust prevention and brightness and stable performance at the same time becomes a technical problem to be solved urgently in the current heat treatment industry. Disclosure of Invention The invention aims to provide a quenching oil composition and a preparation method thereof. In order to achieve the above purpose, the present invention provides the following technical solutions: The quenching oil composition comprises, by weight, 70-85 parts of base oil, 5-10 parts of a composite coolant, 1-3 parts of a high-temperature antioxidant, 0.5-2 parts of a brightening agent and 1-3 parts of an antirust agent. As a further technical scheme, the base oil is a paraffin base oil. As a further technical scheme, the brightening agent is sodium petroleum sulfonate, the active matter content of the sodium petroleum sulfonate is more than or equal to 90%, and the water content is less than or equal to 0.5%. As a further technical scheme, the antirust agent is dodecenyl succinic acid, the acid value of the dodecenyl succinic acid is 190-210mgKOH/g, and the purity is more than or equal to 98%. As a further technical scheme, the composite catalyst consists of high-temperature catalyst dibenzyl toluene and low-temperature catalyst dodecylbenzene according to the mass ratio of 5:3. As a further technical scheme, the high-temperature antioxidant is a nano montmorillonite-loaded modified diphenylamine-hindered phenol compound, wherein the mass ratio of diphenylamine to hindered phenol is 3:2, and the loading capacity of the nano montmorillonite is 8-12% of the total mass of the compound. As a further technical scheme, the hindered phenol is 2, 4-dimethyl-6-tert-butylphenol. A method of preparing a quenching oil composition comprising the steps of: S1, preparing a high-temperature antioxidant, namely adding sodium montmorillonite, adding a coupling agent accounting for 2-3% of the mass of the sodium montmorillonite, stirring and preprocessing for 1.5-2 hours at 70-80 ℃, cooling, filtering and drying to obtain modified nano montmorillonite, weighing diphenylamine and 2, 4-dimethyl-6-tert-butylphenol according to the mass ratio of 3:2, adding the diphenylamine and the 2, 4-dimethyl-6-tert-butylphenol into a reaction kettle, heating to 120-130 ℃, stirring until the materials are completely dissolved to form a mixed system, adding the modified nano montmorillonite into the mixed system, heating to 160-170 ℃ under the protection of inert atmosphere, preserving heat and reacting for 3-4 hours, controlling the stirring rate to be 400-500r/min in the reaction process, and naturally cooling to room temperature after the reaction is