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Water soluble polyether quenching medium

A technology of water-soluble polyether and quenching medium, applied in the direction of quenching agent, heat treatment equipment, manufacturing tools, etc., can solve the problems of increased viscosity of quenching medium, low quenching cooling speed, and economical decline, and achieve good quenching properties, good Inhibition effect, effect of prolonging service life

Active Publication Date: 2010-03-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyether molecular weights used in patent documents such as GB209985 and GB1018215 are 4000-30000 and 600-40000 respectively. Excessively high molecular weight will lead to an increase in the viscosity of the quenching medium, a lower quenching cooling rate, and more The polyether is brought out with the workpiece, and the loss increases, resulting in a decline in its economy

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Prepare a water-soluble quenching medium with a concentration of 1%. The water-soluble polyether is a condensation product of ethylene oxide and propylene oxide. The dosage is 1%, and the number-average molecular weight Mn is less than 20000; The group contains one -OH, -COOH; the defoamer is non-ionic polyether type, the dosage is 500ppm; the compound fungicide is prepared by triazine and isothiazolinone in a ratio of 1:10, and the dosage is 0.1 %; PH value regulator is potassium hydroxide, consumption is 0.2%; Tap water 97.7%.

[0018] The properties and cooling characteristics of 1% concentration quenching medium are as follows:

[0019] Properties of Table 11% Concentration Quenching Medium

[0020]

[0021]

[0022] Table 21% concentration quenching medium and water, standard quenching oil cooling speed comparison

[0023] cooling rate

Embodiment 2

[0025] Configure a water-soluble quenching medium with a concentration of 5%. The water-soluble polyether is a condensation product of ethylene oxide and propylene oxide. The dosage is 5%, and the number-average molecular weight Mn is less than 20000; The group contains one -OH, -COOH; the defoamer is silicone type, and the dosage is 100ppm; the compound fungicide is prepared by triazine and isothiazolinone in a ratio of 1:8, and the dosage is 0.3%; PH value regulator is monoethanolamine, consumption is 1%; Tap water 93.2%.

[0026] Table 35% Concentration Quenching Medium Properties

[0027]

[0028]

[0029] Table 45% concentration quenching medium and water, standard quenching oil cooling speed comparison

[0030] cooling rate

Embodiment 3

[0032] Configure 10% concentration of water-soluble quenching medium, water-soluble polyether is the condensation product of ethylene oxide and propylene oxide, the dosage is 10%, the number average molecular weight Mn is less than 20000; water-soluble antirust agent 0.2%, polar The group contains three -COOH; the defoamer is silicone type, and the dosage is 200ppm; the compound fungicide is prepared by triazine and isothiazolone in a ratio of 1:5, and the dosage is 0.5%; the pH value Regulator is diethanolamine, the dosage is 0.8%; deionized water is 88.5%.

[0033] Table 5 Properties of 10% Concentration Quenching Medium

[0034]

[0035] Table 6 Comparison of cooling speed of 10% concentration quenching medium, water and standard quenching oil

[0036] cooling rate

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Abstract

The invention relates to a water soluble polyether quenching medium for quenching a metal material, which comprises the following components in percentage by weight: 1 to 30 percent of water soluble polyether, 0.1 to 1.0 percent of antirusting agent, 100 to 500ppm of defoaming agent, 0.1 to 1.0 percent of composite germicide, 0.2 to 2 percent of pH regulator and the balance of water, wherein the water soluble polyether is a condensation compound of ethylene oxide and propylene epoxide and a number-average molecular weight is less than 20,000. The water soluble polyether quenching medium is characterized by solving the problems of insufficient hardness of oil quenched workpieces and cracking and deformation of water quenched workpieces, reducing fire hazards in quenching, improving production safety, avoiding oily fume discharge, reducing environment pollution, improving working environment, contributing to the body and mind health of workers, along with readily available raw materials,simple production process, low price, excellent antirusting, defoaming and antibacterial performance, wide quenching cooling speed range and cooling speed ranging from oil quenching cooling speed andwater quenching cooling speed.

Description

technical field [0001] The invention relates to a water-soluble polyether quenching medium for quenching metal materials. Background technique [0002] Iron and other metals are usually heat-treated to improve the strength and metallographic structure of the metal to obtain desired properties. The traditional water-soluble quenching medium has a very high cooling rate and cannot meet the requirements of metal heat treatment. Excessive cooling rate causes excessive internal stress inside the metal, increases metal deformation and cracks the metal after quenching. The use of oil-based quenching medium can reduce the deformation rate of metal after quenching and greatly reduce the risk of metal cracking after quenching, but the quenching cooling rate is too low to greatly reduce the quenching efficiency. At the same time, the traditional oil-based quenching medium often cannot obtain the ideal hardness and strength during metal heat treatment, so its application is limited. ...

Claims

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Application Information

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IPC IPC(8): C21D1/60
Inventor 魏朝良高显振孙成杰王东海
Owner PETROCHINA CO LTD
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