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Environment-friendly quenching liquid and preparation method thereof

A kind of quenching liquid and environmental protection technology, applied in quenching agent, manufacturing tools, heat treatment equipment, etc., can solve the problems of difficult control of production process, poor anti-rust performance, easy to breed bacteria, etc., and achieve good anti-rust effect and good bactericidal effect , the effect of improving the working environment

Active Publication Date: 2017-09-22
山东思科工业介质有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Environment-friendly quenching liquid and preparation method thereof
  • Environment-friendly quenching liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 100kg ISALCHEM145 isomerized alcohol (produced by Sasol, the main component is C14 / 15 isomerized alcohol, containing a small amount of C13 and below, C16 and above isomerized alcohol), 15kg potassium hydroxide solution (concentration 20%) into the polymerization kettle , with ice-salt water circulation cooling at around 0°C, and at the same time pass nitrogen into the polymerization kettle to replace the air in the kettle. When the nitrogen in the kettle maintains positive pressure, feed 100kg ethylene oxide and 100kg propylene oxide Send them into the kettle respectively, while stirring and raising the temperature to 120°C. The pressure in the kettle is kept not more than 0.5MPa. After 12 hours of polymerization, the polymer in the polymerization kettle is discharged, which is the polymerization of isomeric alcohol polyoxyethylene polyoxypropylene ether. things. It can be used as a quenching liquid composition.

[0032] The isomeric alcohol polyoxyethylene polyoxy...

Embodiment 2

[0041] Add 100kg of Synative ALG16 isomeric alcohol (manufactured by BASF, the main component is C16 isomeric alcohol), 15kg of sodium hydroxide solution (10% concentration) into the polymerization kettle, and circulate and cool with ice salt water at about 0°C. Introduce nitrogen into the kettle to replace the air in the kettle. When the nitrogen in the kettle maintains a positive pressure, feed 150kg of ethylene oxide and 50kg of propylene oxide mixture into the kettle with nitrogen feed tank, and stir at the same time to raise the temperature to 100°C. The pressure is kept not greater than 0.5 MPa, and after 12 hours of polymerization, the polymer in the polymerization tank is discharged, which is the isomeric alcohol polyoxyethylene polyoxypropylene ether polymer.

[0042] The isomeric alcohol polyoxyethylene polyoxypropylene ether polymer prepared by the above method has the following physical and chemical indicators after testing:

[0043] project

basic data...

Embodiment 3

[0050] 200kg SAFOL23 isomeric alcohols (production of Sasol company, main component is C12 / C13 isomeric alcohols, containing a small amount of C11 and C14 isomeric alcohols), 22kg potassium hydroxide solution (concentration 15%) are added in the polymerization kettle, with 0 The ice salt water at about ℃ is circulated and cooled, and at the same time, nitrogen is introduced into the polymerization kettle to replace the air in the kettle. When the nitrogen in the kettle maintains a positive pressure, 240kg of ethylene oxide and 160kg of propylene oxide are respectively fed into In the kettle, stir and raise the temperature to 110°C at the same time, and keep the pressure in the kettle not greater than 0.5MPa. After 12 hours of polymerization, the polymer in the polymerization kettle is discharged, which is the isomeric alcohol polyoxyethylene polyoxypropylene ether polymer.

[0051] Add 15kg potassium molybdate, 12kg potassium sorbate, and 120kg star anise extract into 753kg wat...

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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-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/60
CPCC21D1/60
Inventor 张乃庆吴启东邱秋敏
Owner 山东思科工业介质有限公司
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