A kind of environment-friendly vacuum quenching oil and preparation method thereof

Abstract

The invention discloses environment-friendly vacuum quenching oil and a preparation method thereof. The environment-friendly vacuum quenching oil is prepared from the following raw materials in parts by weight: 72-88.7 parts of base oil, 1-5 parts of polyisobutylene succinimide, 1-5 parts of petroleum sodium sulfonate, 8-15 parts of chlorinated paraffin, 0.5-1 part of sulfide molybdenum dialkyldithiocarbamate, 0.1-0.5 part of 4,4'-methylene bis(2,6-di-tert-butylphenol), 0.1-0.3 part of 2,6-ditertbutyl p-cresol, 0.1-0.2 part of poly-dimethyl silicone oil and 0.5-1 part of dodecenylsuccinic acid. The environment-friendly vacuum quenching oil is tasteless and nonpoisonous, has high oxidation resistance and heat stability, is capable of ensuring that workpieces cannot be oxidized when the workpieces are heated and quenched under high vacuum degree, is also capable of quenching steel to be greater than HRC65 in a wide range under low pressure, and is suitable for quenching large-sized and medium-sized aviation structure steel, bearing steel, tool and mould steel and other alloy steel; the recommended service temperature of the environment-friendly vacuum quenching oil is 50-100 DEG C and can reach 150 DEG C in particular cases.

Description

technical field [0001] The invention relates to the production field of quenching oil, in particular to an environment-friendly vacuum quenching oil and a preparation method thereof. Background technique [0002] After metal parts have undergone various processing processes, in order to ensure that they obtain the required process and mechanical properties, heat treatment is usually required. The heat treatment of steel workpiece is a comprehensive process of heating it to a certain temperature, keeping it for a period of time, and then cooling it down at a predetermined speed, including three main steps of austenitization, quenching and tempering of steel. The key to determining the performance of parts is the quenching process. [0003] Compared with conventional heat treatment technology, vacuum heat treatment technology has the advantages of no oxidation, no decarburization, degreasing, degassing, bright surface of parts, small deformation, good reproducibility of proce...

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Problems solved by technology

[0006] 1. Due to the low flash point of the vacuum quenching oil currently on the market, it just meets the use standard. In the actual use process, due to the high vacuum degree of the vacuum furnace and the high oil temperature, the oil product boils and gasifies prematurely and escapes. It not only pollutes the atmosphere, but also needs to add new oil due to the escape of oil products, which also affects the production cost;

[0007] 2. Most of the vacuum quenching oils currently on the market use additives such as polymers (polyolefins) and imidazoline oleate. On the one hand, these additives are artificially synthesized polymers, which are difficult to biodegrade and are harmful to the environment. Cause pollution, on the other hand, because it is aromatic hydrocarbons, it is easy to cause cancer;

[0008] 3. Vacuum quenching oil has high requirements on moisture content. In actual use, it is not allowed to contain moisture, but some manufacturers’ vacuum quenching oil will add a considerable amount of additives with strong emulsifying ability such as Siben-80. These Additives are easy to emulsify the oil and bring in water, which will deteriorate the oil, and will greatly reduce the use effect of vacuum quenching oil in actual use

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