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Method for preparing quenching medium for 45 steel

A technology of quenching medium and mass ratio, applied in the direction of quenching agent, manufacturing tools, heat treatment equipment, etc., can solve the problems of easy fire, narrow cooling speed range of oily quenching agent, low flash point of mineral oil, etc., and achieve excellent quenching effect, Avoid extremely fast cooling effects

Inactive Publication Date: 2020-08-07
马鞍山市鑫龙特钢有限公司
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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, the oily quenching agent based on mineral oil has a narrow cooling rate range, and the flash point of mineral oil is low, which is easy to cause fire and is unsafe to use.

Method used

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  • Method for preparing quenching medium for 45 steel

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preparation example Construction

[0030] A preparation method for quenching medium for 45 steel, comprising the following steps:

[0031] (1) Base fluid preparation:

[0032] The epoxy resin is reacted with amino acid by amine group, and the carboxylic acid group is introduced into the molecular chain of the epoxy resin, and then neutralized to form a salt, and then dispersed in water to prepare a dispersion liquid;

[0033] Add polyethylene glycol and maleic anhydride to the obtained dispersion, ultrasonically disperse for 10-15 minutes, then add it to the reaction kettle, pass inert gas, discharge the air in the reaction kettle, add the accelerator, and adjust the temperature to 70 -80°C, heat preservation and stirring reaction for 2-3 hours to obtain the base liquid;

[0034] (2) Quenching medium preparation:

[0035] Add polyalkylene glycol, defoamer, wetting agent, and rare earth salt to the base liquid, and stir at high speed for 1 hour to obtain the product.

[0036] Described dispersion preparation ...

Embodiment 1

[0059] A preparation method for quenching medium for 45 steel, comprising the following steps:

[0060] (1) Base fluid preparation:

[0061] The epoxy resin is reacted with amino acid by amine group, and the carboxylic acid group is introduced into the molecular chain of the epoxy resin, and then neutralized to form a salt, and then dispersed in water to prepare a dispersion liquid;

[0062] Add polyethylene glycol and maleic anhydride to the obtained dispersion, ultrasonically disperse for 10 minutes, then add it to the reaction kettle, pass inert gas, discharge the air in the reaction kettle, add the accelerator, adjust the temperature to 70 °C, Insulated and stirred for 2 hours to obtain the base liquid, the mixing mass ratio of dispersion liquid, polyethylene glycol and maleic anhydride is 20:4:1, the inert gas is nitrogen, and the accelerator is benzoyl peroxide, benzoyl peroxide The mass ratio of polyethylene glycol to polyethylene glycol is 1:40, and the preparation me...

Embodiment 2

[0067] A preparation method for quenching medium for 45 steel, comprising the following steps:

[0068] (1) Base fluid preparation:

[0069] The epoxy resin is reacted with amino acid by amine group, and the carboxylic acid group is introduced into the molecular chain of the epoxy resin, and then neutralized to form a salt, and then dispersed in water to prepare a dispersion liquid;

[0070] Add polyethylene glycol and maleic anhydride to the obtained dispersion, ultrasonically disperse for 15 minutes, then add it to the reaction kettle, pass inert gas, discharge the air in the reaction kettle, add the accelerator, adjust the temperature to 80 °C, Insulated and stirred for 3 hours to obtain the base liquid, the mixing mass ratio of the dispersion liquid, polyethylene glycol and maleic anhydride is 20:4:1, the inert gas is helium, the accelerator is benzoyl peroxide, benzoyl peroxide The mass ratio of acyl to polyethylene glycol is 1:42, and the preparation method of the dispe...

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Abstract

The invention discloses a method for preparing a quenching medium for 45 steel, and relates to the technical field of quenching mediums. The method comprises the following steps of step (1), preparation of basic liquid: carrying out amino reaction on an epoxy resin and an amino acid, introducing a carboxylic acid group on an epoxy resin molecular chain, performing neutralization and salifying, anddispersing in water to prepare dispersion liquid; adding polyethylene glycol and maleic anhydride into the obtained dispersion liquid, performing ultrasonic dispersion treatment for 10 to 15 minutes,then adding the dispersion liquid into a reaction kettle, introducing inert gases, discharging air in the reaction kettle, adding an accelerant, adjusting the temperature to be 70 to 80 DEG C, carrying out thermal insulation and stirring reaction for 2 to 3 hours to obtain the basic liquid; and step (2), preparation of the quenching medium: adding polyalkylene glycol, defoamer, wetting agent, andrare earth salt to the basic liquid, and stirring at high speed for 1 hour to obtain the quenching medium. The hardness of a 45 steel workpiece after being quenched by the quenching medium prepared by the method of the invention is close to water quenching, and the quenching effect is excellent.

Description

technical field [0001] The invention belongs to the technical field of quenching medium, in particular to a method for preparing a quenching medium for 45 steel. Background technique [0002] 45# is the grade of steel, which is a high-quality carbon structural steel, corresponding to Japanese standard S45C, American standard: 1045, and German standard C45. It is characterized by higher strength and deformation resistance than ordinary A3 steel. [0003] At present, the commonly used quenching media are water-based quenching agent and oil-based quenching agent. The characteristic of water-based quenching agent is that it has a high cooling rate throughout the cooling process. The high cooling rate in the high-temperature cooling stage can promote the formation of fine-grained workpieces. , is conducive to improving the final performance of the workpiece, but in the low temperature stage, too fast cooling rate will cause the internal stress of the workpiece to be too large, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/60C21D1/70
CPCC21D1/60C21D1/70
Inventor 高欣王军
Owner 马鞍山市鑫龙特钢有限公司