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Method for preparing environment-friendly water-soluble hardening agent

A water-soluble quenching agent, an environmentally friendly technology, applied in quenching agents, manufacturing tools, furnace types, etc., can solve problems such as easy quenching and cracking, and achieve the effects of reducing internal stress, low price, and low membrane rupture strength

Active Publication Date: 2014-08-13
马鞍山金泉工业介质科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing quenching agent is easy to crack when quenching the shaft with a diameter of 2m or more and the material is 40Cr, the present invention provides a method for manufacturing an environmentally friendly water-soluble quenching agent. The quenching agent is added by adding reasonable The components and the strictly controlled component distribution ratio can strictly control the cooling rate of large shafts and avoid the occurrence of quenching cracks. The production method of the quenching agent ensures that each of the quenching agents The components are completely dispersed and evenly distributed, so that the quenching agent meets the quenching requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of an environment-friendly water-soluble quenching agent, the steps of which are:

[0037] (1) Sodium carbonate, sodium chloride and sodium hydroxide were dissolved in deionized water at a temperature of 5°C, and stirred for 20 minutes to obtain an initial mixed solution;

[0038] (2) Heating the initial mixed solution in step (1) to 40° C., adding sodium citrate, lotus root powder and acrylic acid, and stirring for 15 minutes to obtain a secondary mixed solution;

[0039] (3) Stand the secondary mixed solution obtained in step (2), add starch when the temperature is cooled to 30°C, stir for 80 minutes, and keep the temperature at 30±2°C during the stirring process to obtain the triple mixed solution;

[0040] (4) Place the three mixed solutions obtained in step (3) in an environment of -20° C. and freeze for 35 minutes to obtain a frozen mixed solution;

[0041] (5) Heat the frozen mixed solution obtained in step (4) to 57°C, the heating rate is 4...

Embodiment 2

[0044] A preparation method of an environment-friendly water-soluble quenching agent, the steps of which are:

[0045] (1) Sodium carbonate, sodium chloride and sodium hydroxide were dissolved in deionized water at a temperature of 25° C., and stirred for 5 minutes to obtain an initial mixed solution;

[0046] (2) Heating the initial mixed solution in step (1) to 45° C., adding sodium citrate, lotus root powder and acrylic acid, and stirring for 10 minutes to obtain a secondary mixed solution;

[0047] (3) Stand the secondary mixed solution obtained in step (2), add starch when the temperature is cooled to 30° C., stir for 60 minutes, and keep the temperature at 30 ± 2° C. during the stirring process to obtain a three-time mixed solution;

[0048] (4) Place the three mixed solutions obtained in step (3) in an environment of -15° C. and freeze for 60 minutes to obtain a frozen mixed solution;

[0049] (5) Heat the frozen mixed solution obtained in step (4) to 50°C, the heating...

Embodiment 3

[0052] A preparation method of an environment-friendly water-soluble quenching agent, the steps of which are:

[0053] (1) Sodium carbonate, sodium chloride and sodium hydroxide were dissolved in deionized water at a temperature of 15°C, and stirred for 10 minutes to obtain an initial mixed solution;

[0054] (2) Heat the initial mixed solution in step (1) to 43°C, add sodium citrate, lotus root powder and acrylic acid, and stir for 13 minutes to obtain a secondary mixed solution;

[0055] (3) Put the secondary mixed solution obtained in step (2) to stand, add starch when the temperature is cooled to 30°C, stir for 100min, and keep the temperature at 30±2°C during the stirring process to obtain the triple mixed solution;

[0056] (4) Place the three mixed solutions obtained in step (3) in an environment of -18° C. and freeze for 20 minutes to obtain a frozen mixed solution;

[0057] (5) Heat the frozen mixed solution obtained in step (4) to 65°C, the heating rate is 7°C / s, ad...

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Abstract

The invention discloses a method for preparing an environment-friendly water-soluble hardening agent and belongs to the field of preparation of hardening agents. The invention belongs to divisional application, and the original Chinese patent application number of is 201310350402.X. According to the preparation method, all components of the hardening agent are guaranteed to be completely dispersed and uniformly distributed by virtue of controlling the feeding sequence of the raw materials and temperature and stirring time, so that the hardening agent meets the hardening requirement, can be used for strictly controlling the cooling speed of large shafts to prevent hardening crack, greatly lowering the initial cooling speed and the cooling speed at a temperature of below 400DEG C and lowering the internal stress of workpieces, has fast enough cooling speed for 650-450DEG C, and guarantees the hardening effect while guaranteeing the product not to be cracked by hardening; after being hardened, large workpieces are not cracked by hardening.

Description

[0001] The present invention is a divisional application, the original Chinese patent application number: 201310350402.X, application date: August 13, 2013, patent name at the time of application: an environmentally friendly water-soluble quenching agent and its manufacturing method. technical field [0002] The invention belongs to the field of quenching agent production, in particular, relates to a method for producing an environment-friendly water-soluble quenching agent, more specifically, relates to a method for quenching a shaft with a diameter of 2 m or more and made of 40Cr The quenching agent used and its method of manufacture. Background technique [0003] The performance of the steel after quenching depends on the microstructure of the steel after quenching, and the quenching microstructure is determined by the composition of the steel, the size of the parts and the quenching cooling rate. There are two effective ways to improve the hardening effect of steel parts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/60C21D9/28
CPCY02P10/20
Inventor 郑益赵慧
Owner 马鞍山金泉工业介质科技有限公司
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