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Biodegradable water-based quenching agent and preparation method thereof

A quenching agent, water-based technology, applied in the field of biodegradable water-based quenching agent and its preparation, can solve the problems of non-renewable raw materials, environmental impact, cracking of workpieces, etc., and achieve the effects of low cost, improved performance, and fine grains

Active Publication Date: 2012-07-11
KASONG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, commonly used quenching media include water-based quenching agents and oil-based quenching agents. Compared with oil-based quenching agents, water-based quenching agents are characterized by high cooling rates throughout the cooling process. High cooling rates in the high-temperature cooling stage can Promoting the formation of fine grains is conducive to improving the comprehensive mechanical properties of the workpiece, but in the low temperature stage, too fast cooling rate will cause excessive internal stress of the workpiece, so it is easy to cause cracking and deformation of the workpiece
In addition, the current commercially available water-based quenching agents are mainly polyether thickeners. The raw materials of polyether thickeners are petroleum processing products ethylene oxide and propylene oxide. The raw materials are non-renewable, and long-chain polyethers Only partially biodegradable, has an impact on the environment

Method used

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  • Biodegradable water-based quenching agent and preparation method thereof
  • Biodegradable water-based quenching agent and preparation method thereof
  • Biodegradable water-based quenching agent and preparation method thereof

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preparation example Construction

[0042] The present invention also provides a kind of preparation method of aqueous quenching agent, comprises the following steps:

[0043] a) Add gelatin, triethanolamine and sodium benzoate to water, stir after mixing;

[0044] b) adding defoamer and bactericide to the obtained mixture, stirring evenly to obtain the product.

Embodiment 1

[0047] The quenching agent provided in this embodiment includes: 0.5 parts by weight of edible gelatin, 0.3 parts by weight of triethanolamine, 0.04 parts by weight of sodium benzoate, and the brand name of Lubrizol Specialty Chemical Co., Ltd. is 0.01 parts by weight of 5674 defoamer, 0.1 parts by weight of bactericide, and 99.05 parts by weight of deionized water.

[0048] The obtained quenching agent has no flash point and is non-combustible, and the cooling curve test results are as follows: figure 1 shown.

[0049] figure 1 Among them, curve 1 is the cooling rate curve, curve 2 is the temperature-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 zone above 400°C, the maximum cooling rate Vmax is 139.0°C / S, and the corresponding temperature TVmax at this time is 712.2°C. It can be seen that the quenching agent medium is There i...

Embodiment 2

[0052] The quenching agent provided in this embodiment includes: 1 weight part of industrial gelatin, 0.2 weight part of triethanolamine, 0.03 weight part of sodium benzoate, 0.04 weight part of 604 silicon defoamer of Dongguan Longhai Chemical Co., Ltd., and 0.15 weight part of bactericide , 98.58 parts by weight of deionized water.

[0053] The obtained quenching agent has no flash point and is non-combustible, and the cooling curve test results are as follows: figure 2 shown.

[0054] figure 2 Among them, curve 1 is the cooling rate curve, curve 2 is the temperature-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 zone above 400°C, the maximum cooling rate Vmax is 142.7°C / S, and the corresponding temperature TVmax is 732.1°C at this time, it can be seen that the quenching agent medium is There is a high cooling rate in the high...

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Abstract

The invention provides a biodegradable water-based quenching agent which comprises the following components by weight percent: 0.1%-2% of gelatin, 0.1%-0.5% of triethanolamine, 0.02%-0.1% of sodium benzoate, 0.005%-0.05% of defoaming agent, 0.05%-0.2% of bactericide and the balance of water. The gelatin is used as a thickening agent, thus the water-based quench agent provided by the invention is biodegradable, low in cost and renewable, and non-renewable petroleum resources are saved; when quenching is carried out, the cooling speed at the high temperature stage above 400 DEG C is greater, sothat an obtained workpiece has fine crystal grains, and the performances of the workpiece are improved; and the cooling speed at the low-temperature stage in the vicinity of 300 DEG C is lower, and then the biodegradable water-based quenching agent is equivalent to fast quenching oil, thereby preventing the formation of greater internal stress in the workpiece, further achieving the purposes of preventing cracking of the workpiece and reducing deformation, and completely replacing the water-based quenching agent prepared by the polyether thickening agent.

Description

technical field [0001] The invention is used in the field of heat treatment of metal materials, and specifically relates to a biodegradable water-based quenching agent and a preparation method thereof. Background technique [0002] In order to improve the performance of metal materials such as steel, it is necessary to heat treat metal workpieces. Common heat treatment processes include quenching, tempering, annealing, normalizing and other heat treatment methods. Among them, quenching refers to the rapid cooling of the workpiece heated to the austenite state at a cooling rate greater than the critical cooling rate to form a quenched structure such as martensite. After quenching, the comprehensive mechanical properties of the workpiece can be improved. [0003] At present, commonly used quenching media include water-based quenching agents and oil-based quenching agents. Compared with oil-based quenching agents, water-based quenching agents are characterized by high cooling r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/60
Inventor 赵之玉胡轩刘新强齐仕全聂泽龙尹振燕李志伟李海涛
Owner KASONG SCI & TECH