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Water-soluble quenching agent and preparation method thereof

A technology of water-soluble quenching agent and aqueous solution, applied in the direction of quenching agent, manufacturing tools, heat treatment equipment, etc., can solve the problems of flammable environment, pollution, high price, etc., achieve the effect of small environmental pollution, overcome high price and low price

Inactive Publication Date: 2010-03-03
洛阳森韵热工设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its high price, easy to burn and serious environmental pollution

Method used

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  • Water-soluble quenching agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Heat 50ml of water to 70°C, add 5g of starch to the water under constant stirring, and stir evenly to form solution A; dissolve 0.5g of sodium hydroxide in 2.5ml of water to form solution B; Solution B was slowly added to solution A to gelatinize the starch, then water was added to 1L, and 5g boric acid was added to make a quenching agent with sodium hydroxide:starch=0.1:1 and a starch concentration of 0.5g / L. Compared with water, this quenching agent has lower characteristic temperature and reduced maximum cooling rate, which can reduce the thermal stress in the high temperature zone, and has almost no effect on the depth of the hardened layer. It is suitable for the quenching of parts with low hardenability and induction heating surfaces Hardened parts.

Embodiment 2

[0030] Heat 200ml of water to 70°C, add 25g of starch to the water under constant stirring, and stir evenly to make solution A; dissolve 2.5g of sodium hydroxide in 10ml of water to make solution B; make the solution under constant stirring B is slowly added to solution A to gelatinize the starch, then water is added to 1L, and 5g phenol is added to make a quenching agent with sodium hydroxide:starch=0.1:1 and a starch concentration of 25g / L. The cooling capacity of this quenching agent is smaller than that of oil, and it can be used for forging cooling instead of normalizing, which can refine the structure, or quenching of high alloy tool steel.

Embodiment 3

[0032] Heat 200ml of water to 30°C, add 25g of starch to the water under constant stirring and stir evenly to make solution A; dissolve 300g of sodium hydroxide in 600ml of water to make solution B; under constant stirring, make solution B Slowly add to solution A to gelatinize the starch, then add water to 1L, and then add 5ml of formaldehyde to make a quenching agent with sodium hydroxide:starch=12:1 and starch concentration of 25g / L. Compared with the quenching agent of Example 2, the low-temperature cooling rate of this quenching agent is basically unchanged, but the characteristic temperature is increased, the maximum cooling rate is increased, and the overall performance is close to the quenching oil. It can be quenched by most alloy steels.

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Abstract

The invention belongs to the technical field of thermal treatment quenching and cooling, and provides a water-soluble quenching agent. The water-soluble quenching agent is water solution containing starch and sodium hydroxide, wherein the content of the starch is 5-25g / L, and the mass ratio of the sodium hydroxide to the starch is (0.1-12):1. When the mass ratio of the sodium hydroxide to the starch is more than 0.5:1, sodium chloride can be used for replacing part of sodium hydroxide to form the water solution consisting of the starch, the sodium hydroxide and the sodium chloride. The water-soluble quenching agent is mixed water solution containing organic matters and inorganic matters, and through the change of the concentration, the cooling speed can be adjusted in a very wide range, and the cooling property with higher cooling speed than that of water and lower cooling speed than that of oil can be obtained. The invention overcomes the defects that the oil has high price, easy to combust and seriously pollutes the environment as well as the high-temperature cooling speed of the water solution of the inorganic matters is difficult to reduce.

Description

Technical field [0001] The invention belongs to the technical field of heat treatment, quenching and cooling, and mainly relates to a water-soluble quenching agent and a preparation method. Background technique [0002] Heat treatment is to achieve the purpose of improving metal performance requirements through three processes of heating, heat preservation and cooling. Among these three processes, the cooling process is the most critical. With furnace cooling and cooling in air, the cooling rate is slow, and the hardness of the material is low. In order to improve the performance of strength and hardness, the workpiece must be cooled in a certain medium to obtain the martensite structure after heating and holding. Different materials or different parts sizes require cooling in different media. At present, the commonly used cooling media include water, aqueous solutions of inorganic compounds, aqueous solutions of organic compounds, and oil. [0003] Adding inorganic substances ...

Claims

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Application Information

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IPC IPC(8): C21D1/60
Inventor 王顺兴王守奇
Owner 洛阳森韵热工设备有限公司
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