Environmentally-friendly water-soluble quenching medium

A quenching medium, water-soluble technology, applied in the direction of quenching agent, heat treatment equipment, manufacturing tools, etc., can solve the problems of application limitations, inability to use directly, restrictions, etc., achieve good sterilization and surface activity, prevent bacterial growth, and good anti-embroidery and defoaming effect

Inactive Publication Date: 2011-08-03
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese patent with publication number CN1394896A discloses a polyalkylene glycol polycondensation synthesis method, but only provides a polyalkylene glycol quenching medium stock solution, which cannot be used directly; patent ZL200710035043.3 provides a water-soluble Non-toxic and environmentally friendly quenching medium, mainly composed of cellulose with a molecular weight of 15000-30000, sodium chloride, potassium chloride and tap water, mainly used for quenching in salt bath furnaces, which limits its application; patent ZL02132504.9 and patent 200810119463.4 respectively provide A water-soluble quenching medium was developed. Due to the low molecular weight of polyether compounds, there are certain limitations in the selection of surfactants and bactericides, so that its application is limited and it cannot be suitable for heat treatment of large castings and forgings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Configure a water-soluble quenching medium suitable for low quenching temperature with a concentration of 15%. In terms of mass percentage, the amount of polyether with a molecular weight of 20000-30000 is 14.5%, and the amount of polyether with a molecular weight of 5000-15000 is 0.5%. The consumption of base-3(2H)-isothiazolinone is 1.0%, the consumption of ethyl silicone oil is 0.1%, and the consumption of the quaternary ammonium salt and the quaternary phosphonium salt bactericide that the ratio is 15:1 is 500ppm, by Japanese Central Chemical Co., Ltd. The amount of AO-10 type surfactant produced by the company is 500ppm, the amount of pH regulator is 0.3%, and the amount of tap water is 83.5%.

[0027] The performance and cooling characteristics of the water-soluble quenching medium with a concentration of 15% are shown in Table 1

[0028] Table 1 Performance and cooling characteristics of several quenching media

[0029]

Embodiment 2

[0031] Configure a water-soluble quenching medium with a concentration of 15% suitable for high quenching temperatures. The amount of polyether with a molecular weight of 20,000-30,000 is 0.5%, and the amount of polyether with a molecular weight of 5,000-15,000 is 14.5%. 2-Methyl-3 (2H) - The amount of isothiazolinone is 0.5%, the amount of ethyl silicone oil is 0.2%, the amount of quaternary ammonium salt and quaternary phosphonium salt fungicide with a ratio of 10:1 is 800ppm, AO-10 produced by Japan Chuo Chemical Co., Ltd. Type surfactant consumption is 200ppm, and the consumption of pH value adjusting agent is 0.2%, and the consumption of tap water is 84%.

[0032] The performance and the cooling characteristic of the water-soluble quenching medium of the embodiment 2 of configuration are as table 2

[0033] Table 2 Performance and cooling characteristics of the quenching medium in Example 2

[0034]

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Abstract

The invention discloses an environmentally-friendly water-soluble quenching medium which is characterized by comprising the following components in percentage by weight: 0.5-20 percent of water-soluble polyether with the molecular weight of 20000-30000, 0.5-30 percent of water-soluble polyether with the molecular weight of 5000-15000, 0.5-1.5 percent of rust resistant agent, 0.1-0.2 percent of defoaming agent, 300-800ppm of bactericide, 200-500ppm of surfactant, 0.1-5 percent of pH adjusting agent and the balance of water. The environmentally-friendly water-soluble quenching medium is suitable for thermally treating large-sized casting and forging pieces, can be used for adjusting the average molecular weight of a polyether mixture according to the requirement and for properly adjusting the heat resistance and the viscosity of the water-soluble quenching medium; and the quenching and cooling speed can be adjusted by adjusting the concentration of the water-soluble quenching medium so that the application range of the quenching medium is widened.

Description

technical field [0001] The invention relates to a quenching medium used in heat treatment, in particular to an environment-friendly water-soluble quenching medium. Background technique [0002] Quenching is one of the most basic processes of heat treatment, and the quenching medium is the key to ensure the quality of quenching. The traditional quenching medium is water and oil; due to the slow cooling rate of oil, there are often phenomena such as insufficient quenching hardness of the workpiece or the depth of the hardened layer does not meet the predetermined requirements; the cooling rate of water is fast, often causing distortion, distortion, and even cracking of the workpiece ; In addition, water is easy to vaporize and generate bubbles during the quenching process, which causes soft spots on the surface of the workpiece due to uneven cooling. [0003] The cooling speed of the water-soluble quenching medium is between oil and brine, and any cooling speed between brin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/60
Inventor 闫焉服宋克兴王淼辉周永松李永兵葛学元赵培峰张彦敏
Owner HENAN UNIV OF SCI & TECH
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