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Water-based quenching liquid, preparation method thereof and application of water-based quenching liquid in quenching of elastic strip

A water-based quenching and clip technology, which is used in quenching agents, manufacturing tools, heat treatment equipment, etc., can solve the problems of difficulty in ensuring the hardness of the core of clips, increase the cost of environmental protection, and reduce the service life of clips. With the effect of extension, long service life and increased quenching speed

Pending Publication Date: 2021-08-20
BEIJING TIEKE SHOUGANG RAIL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quenching oil can meet the hardenability requirements of part of the elastic bars, but for the elastic bars with larger diameters, it is difficult to ensure the core hardness of the elastic bars
Moreover, rapid quenching oil will produce a large residual tensile stress, which will cause quenching cracks on the surface of some spring bars and reduce the service life of the spring bars
At the same time, when the quenching oil is used, it will produce soot, oily wastewater and oily iron slag, which will increase the cost of environmental protection treatment

Method used

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  • Water-based quenching liquid, preparation method thereof and application of water-based quenching liquid in quenching of elastic strip
  • Water-based quenching liquid, preparation method thereof and application of water-based quenching liquid in quenching of elastic strip
  • Water-based quenching liquid, preparation method thereof and application of water-based quenching liquid in quenching of elastic strip

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Embodiment approach

[0024] According to a preferred embodiment of the present invention, the water-based quenching liquid contains sodium chloride, and its concentration can be 0.01% by weight, 0.05% by weight, 0.1% by weight, 0.5% by weight, 1% by weight, 2% by weight, 3% by weight % by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 15% by weight, 20% by weight, 25% by weight, preferably 3-8% by weight .

[0025] According to a preferred embodiment of the present invention, the water-based quenching liquid contains calcium chloride, and its concentration can be 0.01% by weight, 0.05% by weight, 0.1% by weight, 0.5% by weight, 1% by weight, 2% by weight, 3% by weight % by weight, 4% by weight, 5% by weight, 6% by weight, 7% by weight, 8% by weight, 9% by weight, 10% by weight, 15% by weight, 20% by weight, 25% by weight, preferably 3-8% by weight .

[0026] According to a preferred embodiment of the present invention, the water-based q...

Embodiment 1-3

[0060] Used to illustrate the water-based quenching liquid provided by the present invention and its preparation method

[0061] 1. Dissolve calcium chloride in deionized water and stir for 60 minutes to obtain the initial solution;

[0062] 2. Add sodium benzoate, sodium gluconate, and sodium molybdate to the mixed solution in step 1, and stir for 60 minutes;

[0063] 3. Heat the mixed solution in step 2 to 60°C, add phosphonocarboxylic acid copolymer (POCA, weight average molecular weight 4000), triazole, and stir for 60 minutes;

[0064] 4. Cool the mixed solution in step 3 to 25°C, and adjust the pH value by adding sodium hydroxide. After stirring for 30 minutes, filter the precipitate to obtain a water-based quenching solution. The concentration of each component is shown in Table 1.

[0065] Table 1

[0066] Example 1 Example 2 Example 3 Calcium chloride (weight%) 5 8 3 Sodium Benzoate (wt%) 0.5 0.05 0.1 Sodium gluconate (weight%) 0...

Embodiment 4

[0068] The preparation of the water-based quenching solution was carried out according to the method of Example 1, except that calcium chloride was not added, but replaced with an equivalent amount of sodium chloride.

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Abstract

The invention relates to the technical field of railway engineering product manufacturing, in particular to water-based quenching liquid, a preparation method thereof and application of the water-based quenching liquid in quenching of an elastic strip. The water-based quenching liquid comprises the following components in percentage by weight: 0.1 to 0.8 percent of sodium benzoate, 0.01 to 0.5 percent of sodium gluconate, 0.01 to 0.5 percent of phosphono carboxylic acid copolymer, 0.01 to 0.5 percent of triazole, 0.01 to 0.5 percent of sodium molybdate, 0 to 25 percent of sodium chloride, 0 to 25 percent of calcium chloride, 0 to 25 percent of sodium nitrate and the balance of water, wherein the contents of sodium chloride, calcium chloride and sodium nitrate are not 0 at the same time. By the adoption of the water-based quenching liquid, the quenching speed of the elastic strip can be increased, the hardness uniformity of a quenching core part is guaranteed, residual compressive stress is generated on the surface of the quenched elastic strip, generation and extension of hardening cracks are inhibited, and the water-based quenching liquid has the advantages of being safe and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of manufacturing railway engineering products, in particular to a water-based quenching liquid, a preparation method thereof and an application in quenching elastic bars. Background technique [0002] The elastic strip is the core of the fastener system. It can provide a certain fastening force for the fastener system through elastic deformation, and at the same time absorb the energy of the rail impact and vibration to ensure the stability of the rail. During the manufacturing process of the spring bar, the potential of the metal material is fully utilized through quenching and tempering treatment to meet the use requirements of the spring bar. [0003] The quenching medium for spring bars mainly needs to meet two requirements: one is to have sufficient cooling capacity to completely transform the structure of the spring bars into martensite to ensure uniform hardness of the spring bars; the other is to red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/60C21D1/18C21D9/00
CPCC21D1/60C21D1/18C21D9/0068
Inventor 王亚洲张远庆汝继来于毫勇李彦山吕明奎王培隗永旺陈晨张晨旭
Owner BEIJING TIEKE SHOUGANG RAIL TECH CO LTD
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