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A kind of quenching liquid with low temperature cooling rate close to quenching oil and its preparation method and application

A technology of quenching oil and quenching liquid, which is applied in the field of quenching liquid, can solve the problems of inapplicability of quenching liquid, and achieve the effect of sufficient hardness, not easy to crack, and uniform internal structure and shape

Active Publication Date: 2019-04-16
马鞍山金泉工业介质科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problem that the existing quenching liquid is not suitable for quenching medium-carbon alloy steel, the present invention provides a quenching liquid with a low-temperature cooling rate close to that of quenching oil. The quenching liquid of the present invention does not have inverse solubility, and there is no need to strictly control the temperature during use. And it has a high-temperature cooling rate faster than oil, but a low-temperature cooling rate close to quenching oil

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  • A kind of quenching liquid with low temperature cooling rate close to quenching oil and its preparation method and application

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Effect test

Embodiment 1

[0033] A quenching solution with a low temperature cooling rate close to quenching oil, its composition and mass parts are: 9 parts of polyvinylpyrrolidone mixture, 10 parts of polyacrylamide, 7 parts of non-drying short oil alkyd resin, 3 parts of polyvinyl alcohol 3 parts of fungicide (hydroxyethyl hexahydro-s-triazine), 1 part of defoamer (n-hexadecanol), 15 parts of water. Wherein, the polyvinylpyrrolidone mixture is obtained by mixing polyvinylpyrrolidone with a k value of 29-32 and polyvinylpyrrolidone with a k value of 85-95 according to a mass ratio of 7:3. Different k values ​​of polyvinylpyrrolidone represent corresponding average molecular weight ranges, the average molecular weight of polyvinylpyrrolidone with k value in the range of 29-32 is 58,000, and the average molecular weight of polyvinylpyrrolidone with k value in the range of 5-95 is 1,300,000. Generally, the larger the k value, the greater the viscosity.

[0034] Above-mentioned a kind of preparation met...

Embodiment 2

[0043] A quenching liquid with a low temperature cooling rate close to quenching oil, its composition and mass parts are: 15 parts of polyvinylpyrrolidone mixture, 6 parts of polyacrylamide, 5 parts of non-drying short oil alkyd resin, 4 parts of polyvinyl alcohol 2 parts, 2 parts of fungicide (morpholine derivatives), 2 parts of defoamer (polyoxyethylene polyoxypropanolamine ether), 20 parts of water. Wherein, the polyvinylpyrrolidone mixture is obtained by mixing polyvinylpyrrolidone with a k value of 29-32 and polyvinylpyrrolidone with a k value of 85-95 according to a mass ratio of 7:3. Different k values ​​of polyvinylpyrrolidone represent corresponding average molecular weight ranges, the average molecular weight of polyvinylpyrrolidone with k value in the range of 29-32 is 58,000, and the average molecular weight of polyvinylpyrrolidone with k value in the range of 5-95 is 1,300,000. Generally, the larger the k value, the greater the viscosity.

[0044] Above-mentioned...

Embodiment 3

[0053] A quenching liquid with a low temperature cooling rate close to quenching oil, its composition and mass parts are: 10 parts of polyvinylpyrrolidone mixture, 8 parts of polyacrylamide, 8 parts of non-drying short oil alkyd resin, 5 parts of polyvinyl alcohol 3 parts of bactericide (morpholine derivatives), 2 parts of antifoaming agent (polydimethylsiloxane), 25 parts of water. Wherein, the polyvinylpyrrolidone mixture is obtained by mixing polyvinylpyrrolidone with a k value of 29-32 and polyvinylpyrrolidone with a k value of 85-95 according to a mass ratio of 7:3.

[0054] Above-mentioned a kind of preparation method of the quenching liquid that cooling speed is close to quenching oil at low temperature, comprises the following steps:

[0055] (1) mix the polyvinylpyrrolidone with a k value of 29-32 and the polyvinylpyrrolidone with a k value of 85-95 in proportion;

[0056] (2) Dissolve the polyvinylpyrrolidone mixture in water, then add polyvinyl alcohol, and heat to...

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Abstract

The invention discloses a quenching liquid approaching to quenching oil at low temperature and cooling speed, and a preparation method and application thereof, and belongs to the technical field of quenching liquid. The quenching liquid comprises, by mass, 9-15 parts of polyvinylpyrrolidone mixtures, 6-10 parts of polyacrylamide, 5-8 parts of non-drying short oil length alkyd resin, 3-5 parts of polyvinyl alcohol, 2-3 parts of bactericides, 1-2 parts of defoaming agents and 15-25 parts of water. The quenching liquid disclosed by the invention is applicable for quenching small and medium-sizedforgings and complex forgings, and the forgings are made of medium-carbon alloy steel; the quenching liquid approaches to aqueous quenching media at high temperature and the cooling speed, and approaches to the quenching oil at the low temperature and the cooling speed; and based on such unique property, quenched workpieces are uniform in structures, and not liable to crack by quenching.

Description

technical field [0001] The invention belongs to the technical field of quenching liquid, and more specifically relates to a quenching liquid with a low-temperature cooling rate close to that of quenching oil, a preparation method and application thereof. Background technique [0002] Quenching is an important process in the heat treatment process. Various properties of metal materials, such as strength, hardness, toughness, corrosion resistance, wear resistance, fatigue resistance and process performance, can be greatly improved through quenching treatment, and the potential of metal materials can be fully utilized. Meet the requirements of various product workpieces for metal materials. During the quenching process of the workpiece, due to improper handling, the metallographic structure or mechanical properties often fail to meet the requirements, as well as defects such as deformation, cracking, and soft spots. The occurrence of these defects is not only related to the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/50
CPCC21D1/50
Inventor 郑益刘进刘祥郑景亮史传喜刘凌
Owner 马鞍山金泉工业介质科技有限公司