A kind of environment-friendly quenching liquid and preparation method thereof

Abstract

The invention provides an environment-friendly quenching liquid combination. The quenching liquid combination is characterized by being composed of, by weight, 100 parts of isomer alcohol, 50-150 parts of ethylene oxide and 50-150 parts of epoxypropane. According to the environment-friendly quenching liquid combination prepared by the method, 5-20% of water solutions can be used for replacing oil for induction quenching of low-carbon and medium-carbon steel and integral quenching of large parts; different cooling speeds can be obtained by adjusting the concentration, and the application range is wide; the quenching hardness is uniform, the hardening layer is deep, no soft point exists, and the tendency of quenching deformation and cracking is effectively reduced; the workpiece is clean and bright after being quenched, has a certain rust-proof function, and can be free of cleaning and tempering; the rust-proof effect on ferrous metal and nonferrous metal is good; the carrying quantity is small, the use cost is low, and the comprehensive economical efficiency is good; and oil smoke and combustion are avoided, the fire hazard is avoided, and the labor environment is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of metal quenching, and in particular relates to an environment-friendly quenching liquid and a preparation method thereof. Background technique [0002] At present, the quenching medium used in the metal heat treatment process is mainly mineral oil or water. Mineral oil quenching is mainly used for medium and low carbon steels with a high quenching tendency. Due to the slow cooling rate of oil, it often occurs that the quenching is not hard or the quenching layer is shallow. The problem is that water is mainly used as a quenching medium for alloy steel with a small tendency to quench cracking. Since the characteristic of water is that the cooling rate is faster in high and low temperature areas, it is difficult to control during the production process. Quenching cracks often occur and quenching is not hard or quenching is not good. average phenomenon. At present, some units are also researching some water-...

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Problems solved by technology

[0002] At present, the quenching medium used in the metal heat treatment process is mainly mineral oil or water. Mineral oil quenching is mainly used for medium and low carbon steels with a high quenching tendency. Due to the slow cooling rate of oil, it often occurs that the quenching is not hard or the quenching layer is shallow. The problem is that water is mainly used as a quenching medium for alloy steel with a small tendency to quench cracking. Since the characteristic of water is that the cooling rate is faster in high and low temperature areas, it is difficult to control during the production process. Quenching cracks often occur and quenching is not hard or quenching is not good. average phenomenon

At present, some units are also researching some water-soluble quenching liquids, mainly adding some lipophilic and hydrophilic organic compounds and inorganic salts to the water, often with poor anti-rust performance, or adding carcinogenic and teratogenic ingredients such as nitrite or nitrate Anti-rust

[0003] When organic quenching medium such as PAG is used, it is easy to breed bacteria and cause the medium to deteriorate. When the medium is added with fungicides such as triazine, morpholine, and isothiazolinone, it can effectively inhibit the growth of bacteria and fungi, but these fungicides Often release formaldehyde to sterilize human body and aquatic animals with carcinogenic and teratogenic components

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