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Alloy steel environment-friendly type water-based quenching agent

A water-based quenching agent, an environmentally friendly technology, applied in the direction of quenching agent, heat treatment equipment, manufacturing tools, etc., can solve the problems of heat treatment product quality decline, accelerated aging of organic solutions, and changes in cooling characteristics, etc., to achieve reasonable cooling rate distribution, Strong hardenability, the effect of reducing the amount of addition

Inactive Publication Date: 2019-08-23
嘉禾县飞恒合金铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this kind of water-soluble organic cooling medium is used for quenching, the organic matter solution will accelerate aging after being heated, and its cooling characteristics will change. If it is not replaced in time, the quality of heat-treated products will be reduced, or even unqualified.

Method used

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  • Alloy steel environment-friendly type water-based quenching agent

Examples

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preparation example Construction

[0046] The second aspect of the present invention provides a method for preparing an alloy steel environment-friendly water-based quenching agent, the steps comprising:

[0047] (1) Add water in the stirring tank, start stirring and heating to 70°C, add calcium sulfate, sodium nitrite, sodium benzoate, thiourea in turn, and stir until completely dissolved;

[0048] (2) After adding polyvinyl alcohol, fully stir until completely dissolved;

[0049] (3) Cover the reaction kettle after fully stirring evenly in the stirring tank, and pack after cooling to room temperature.

Embodiment 1

[0053] Embodiment 1 provides an environment-friendly water-based quenching agent for alloy steel, comprising the following components in parts by weight: 5 parts of polyvinyl alcohol, 0.1 part of calcium sulfate, 1 part of sodium nitrite, 1 part of sodium benzoate, thiourea 0.01 part, 70 parts of water.

[0054] The polyvinyl alcohol includes 5 wt% modified polyvinyl alcohol; the modified polyvinyl alcohol is sulfonic acid modified polyvinyl alcohol; the grade of the sulfonic acid modified polyvinyl alcohol is Goselan L-3266.

[0055] A preparation method of alloy steel environment-friendly water-based quenching agent, the steps comprising:

[0056] (1) Add water in the stirring tank, start stirring and heating to 70°C, add calcium sulfate, sodium nitrite, sodium benzoate, thiourea in turn, and stir until completely dissolved;

[0057] (2) After adding polyvinyl alcohol, fully stir until completely dissolved;

[0058] (3) Cover the reaction kettle after fully stirring evenly...

Embodiment 2

[0060] Embodiment 2 provides an environment-friendly water-based quenching agent for alloy steel, comprising the following components in parts by weight: 20 parts of polyvinyl alcohol, 1 part of calcium sulfate, 7 parts of sodium nitrite, 4 parts of sodium benzoate, thiourea 0.05 parts, 100 parts of water.

[0061] The polyvinyl alcohol includes 1 wt% modified polyvinyl alcohol; the modified polyvinyl alcohol is sulfonic acid modified polyvinyl alcohol; the grade of the sulfonic acid modified polyvinyl alcohol is Goselan L-3266.

[0062] A preparation method of an environment-friendly water-based quenching agent for alloy steel, the steps of which are the same as in Example 1.

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Abstract

The invention relates to the technical field of quenching agents, and particularly relates to an alloy steel environment-friendly type water-based quenching agent. The alloy steel environment-friendlytype water-based quenching agent is prepared from the following components: polyacrylamide, calcium sulfate, sodium nitrite, sodium benzoate, thiourea and water. The quenching agent provided by the invention is reasonable in cooling speed distribution, is good in cooling uniformity, can effectively guarantee uniform consistency and performance consistency of a structure inside a workpiece, is strong in quenching degree, is high in hardness, is uniform, is free of quenching cracks, is less in usage amount, can reduce adding amount of noble metal, reduces production cost of raw materials, is safe and pollution-free, is not ignited, and is suitable for quenching treatment of low-alloy steel parts.

Description

technical field [0001] The invention belongs to the technical field of quenching agents, and more specifically relates to an environment-friendly water-based quenching agent for alloy steel. Background technique [0002] Quenching is a process in which a metal workpiece is heated above the phase transition temperature, and then rapidly cooled in a quenching medium after heat preservation to obtain a martensitic structure. Through the quenching process, the purpose of improving or adjusting the hardness and wear resistance of the workpiece can be achieved. [0003] Quenches are water-soluble solutions of liquid organic polymers and corrosion inhibitors. The quenching agent is mainly used for all kinds of carbon steel, low alloy structural steel, spring steel, carburizing steel, and bearing steel workpieces for body-increasing immersion quenching and induction heating quenching. When cooling hot metal with a dilute solution of quenching agent, the liquid organic polymer will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/60C21D6/00
CPCC21D1/60C21D6/00
Inventor 李志飞李恒
Owner 嘉禾县飞恒合金铸造有限公司