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Quenching agent

A technology of quenching agent and defoaming agent, applied in the direction of quenching agent, heat treatment equipment, manufacturing tools, etc., can solve the problems of low flash point of mineral oil, easy environmental pollution, unsafe use, etc.

Active Publication Date: 2010-11-24
KASONG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unique performance of mineral oil determines that a large amount of smoke will be generated during quenching, so it is easy to pollute the environment and has poor environmental protection function
Moreover, oily quenchants based on mineral oil have a narrow cooling rate range
In addition, mineral oil has a low flash point, which is easy to cause fire and is unsafe to use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The quenching agent provided in this embodiment includes, by weight percentage, 40 parts by weight of PB-140 polyether, 1 part by weight of triethanolamine, 1 part by weight of sodium benzoate, 0.05 parts by weight of 5674 defoamer, 57.95 parts by weight of deionized water. Dilute the quenching agent provided by this embodiment 1 with 1900 parts by weight of water to a concentration of 5wt%, the flash point is non-flammable, and the cooling curve test results are as follows: figure 1 shown.

[0042] figure 1 Among them, curve 1 is the cooling rate curve, curve 2 is the cooling time curve, and the test temperature starts from 850°C. From figure 1 It can be seen that, as shown in curve 1, the quenching agent provided by the present invention is in the high temperature region above 400°C, the maximum cooling rate Vmax is 149.6°C / S, and the corresponding cooling temperature TVmax is 512.1°C at this time, that is to say, the quenching agent The agent medium has a high c...

Embodiment 2

[0045]The quenching agent provided in this embodiment includes, by weight percentage, 30 parts by weight of PB-560 polyether, 5 parts by weight of triethanolamine, 0.2 parts by weight of sodium benzoate, 0.3 parts by weight of 5674 defoamer, 64.5 parts by weight of deionized water. Dilute the quenching agent provided by this embodiment with 900 parts by weight of water to a concentration of 10wt%, the flash point is non-flammable, and the cooling curve test results are as follows: figure 2 shown.

[0046] figure 2 Among them, curve 1 is the cooling rate curve, curve 2 is the cooling time curve, and the test temperature starts from 850°C. From figure 2 It can be seen that, as shown in curve 1, the quenching agent provided by the present invention is in the high temperature region above 400°C, the maximum cooling rate Vmax is 121.1°C / S, and the corresponding cooling temperature TVmax is 510.5°C at this time, that is to say, the quenching agent The agent medium has a high...

Embodiment 3

[0049] The quenching agent provided in this embodiment includes, by weight percentage, 43.5 parts by weight of PB-560 polyether, 6 parts by weight of triethanolamine, 1.2 parts by weight of sodium benzoate, 0.2 parts by weight of 5674 defoamer, 99.1 parts by weight of deionized water. Dilute the quenching agent provided by this embodiment with 850 parts by weight of water to a concentration of 15wt%, the flash point is non-flammable, and the cooling curve test results are as follows: image 3 shown.

[0050] image 3 Among them, curve 1 is the cooling rate curve, curve 3 is the cooling time curve, and the test temperature starts from 850°C. From image 3 It can be seen that, as shown in curve 1, the quenching agent provided by the present invention is in the high temperature region above 400°C, the maximum cooling rate Vmax is 114.8°C / S, and the corresponding cooling temperature TVmax is 654.2°C at this time, that is to say, the quenching agent The agent medium has a high...

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Abstract

The invention provides a quenching agent which is characterized by comprising the following components in percentage by weight: 13%-40% of polyether, 1%-5% of triethanolamine, 0.2%-1% of sodium benzoate, 0.05%-0.5% of defoaming agent and the balance of water. By preparing the quenching agent provided by the invention into different concentration for carrying out cooling experiment, the experiment result shows that the quenching agent provided by the invention has high cooling speed at the temperature higher than 400 DEG C, thereby obtaining fine workpiece grains and improving the performance of workpieces; and the quenching agent provided by the invention has lower cooling speed at the temperature lower than 400 DEG C, thereby preventing larger internal stress from forming in the workpieces to achieve the purpose of preventing the workpieces from cracking.

Description

technical field [0001] The invention relates to the field of metal heat treatment, in particular to a quenching agent. Background technique [0002] In order to improve the properties of metal materials such as steel, it is necessary to heat treat metal workpieces. The commonly used heat treatment processes include quenching, tempering, annealing, normalizing and other heat treatment methods. Among them, quenching refers to, for example, rapidly cooling a workpiece heated to an austenite state at a speed above the critical cooling rate to form a quenched structure such as martensite. After quenching, the hardness of the workpiece can be increased. In the quenching process, the cooling process of the workpiece is generally divided into three stages, that is, the first stage (steam film stage) in which the metal material is surrounded by the vapor of the quenching medium, the second stage (boiling stage) in which the vapor film breaks and boils, and the metal The temperature ...

Claims

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Application Information

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IPC IPC(8): C21D1/60
Inventor 刘新强聂泽龙齐仕全李志伟
Owner KASONG SCI & TECH
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