Inorganic polymer water-soluble quenching medium and preparation method thereof

A technology of inorganic polymer and quenching medium, which is applied in the direction of quenching agent, manufacturing tools, heat treatment equipment, etc., can solve the problems of air pollution, narrow temperature range of medium use, large consumption of use, etc., to improve hardness and hardness uniformity, Reasonable distribution of cooling characteristics and the effect of reducing the transformation speed

CN102061365BActive Publication Date: 2013-10-30DALIAN SANJIN LUBRICANT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-10-30

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Abstract

The invention discloses an inorganic polymer water-soluble quenching medium which has reasonable cooling characteristic distribution and stable performance, is safe and environmentally friendly and has lower cost, and a preparation method thereof. The quenching medium is an aqueous solution formed by mixing polyaluminium chloride, sodium hydroxide, zinc chloride, potassium chloride and water, wherein the concentration of the aqueous solution is 8-35 Baume and the aqueous solution comprises the following raw materials by weight percent: 59-62% of the polyaluminium chloride, 19-21% of the 10% sodium hydroxide, 14-16% of zinc chloride, 11-13% of the potassium chloride and the balance water. The preparation method comprises the following steps in sequence: adding the polyaluminium chloride and water in a container, and stirring until the polyaluminium chloride is fully dissolved; adding the 10% sodium hydroxide solution in the container, and stirring evenly; dissolving the zinc chloride in water, then adding the zinc chloride solution in the container, and stirring evenly; dissolving the potassium chloride in water, then adding the potassium chloride solution in the container, and stirring evenly; and adding water to ensure that the concentration of the solution in the container is 8-35 Baume.
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Description

technical field

[0001] The invention relates to a quenching medium, especially an inorganic polymer water-soluble quenching medium suitable for quenching bearing steels such as GCr15, GCr15SiMn and 42CrMo, which has reasonable distribution of cooling characteristics, stable performance, safety and environmental protection, and can reduce costs, and a preparation method thereof . Background technique

[0002] In the past, in order to improve the surface hardness of the workpiece, the bearing industry mostly used quenching oil with petroleum as the main raw material, and there were the following problems:

[0003] 1. The cooling rate in the high temperature zone is slow, and the GCr15 workpieces with a diameter below Φ40mm can still meet the quality requirements.

[0004] However, for workpieces with a diameter of Φ40mm or more, there will be a phenomenon that the hardening is not hardened or the hardened layer is shallow;

[0005] 2. During use, the oil fume is large and ...

Examples

Embodiment 1

[0035] The preparation method of quenching medium is carried out according to the following steps successively:

[0036] a. 60 kilograms of polyaluminum chloride and 45 kilograms of water are placed in a container and stirred until completely dissolved, polyaluminum chloride, the molecular formula is [Al 2 (OH) n Cl 6-n ] m , m≤10, n=1~5;

[0037] b. Add 20 kilograms of aqueous sodium hydroxide solution with a concentration of 10% into the container and stir evenly;

[0038] c. Dissolve 15 kilograms of zinc chloride in 87 kilograms of water earlier, then place the zinc chloride aqueous solution in the container and stir evenly;

[0039] d. Dissolve 12 kilograms of Potassium Chloride in 87 kilograms of water earlier, then place Potassium Chloride aqueous solution in the container and stir evenly;

[0040] e. Prepare the solution in the container with water until the Baume degree is 8. That's it.

Embodiment 2

[0052] The preparation method of quenching medium is carried out according to the following steps successively:

[0053] a. 59 kilograms of polyaluminum chloride and 40 kilograms of water are placed in a container and stirred until fully dissolved;

[0054] b. Add 19 kilograms of aqueous sodium hydroxide solution with a concentration of 10% into the container and stir evenly;

[0055] c. Dissolve 14 kg of zinc chloride in 85 kg of water, then place the zinc chloride aqueous solution in the container and stir evenly;

[0056] d. Dissolve 11 kg of Potassium Chloride in 85 kg of water, then place Potassium Chloride aqueous solution in the container and stir evenly;

[0057] e. Prepare the solution in the container with water until the Baume degree is 20.

[0058] During use, the embodiment 2 of the present invention needs to be diluted with water to be 8-10 in Baume degree.

Embodiment 3

[0066] The preparation method of quenching medium is carried out according to the following steps successively:

[0067] a. 62 kilograms of polyaluminum chloride and 50 kilograms of water are placed in a container and stirred until fully dissolved;

[0068] b. 21 kilograms of concentration are 10% sodium hydroxide aqueous solution to add in the container and stir evenly;

[0069] c. Dissolve 16 kg of zinc chloride in 90 kg of water, then place the zinc chloride aqueous solution in the container and stir evenly;

[0070] d. be that the potassium chloride of 13 kilograms is dissolved in the water of 90 kilograms earlier by the mass fraction, then potassium chloride aqueous solution is placed in the container and stirs;

[0071] e. Prepare the solution in the container with water until the Baume degree is 35.

[0072] When in use, the embodiment 3 of the present invention needs to be diluted with water to be 8-10 in Baume degree.