A uniform cooling medium with stable cooling performance during use

Abstract

The invention discloses a constant-speed cooling medium stable in cooling performance in the using process. The constant-speed cooling medium is prepared according to a following method: at 30-50 DEG C, a needed amount of reagent sodium carboxymethyl cellulose and vinyl pyrrolidone or mixed monomer are placed in a reaction solution, wherein the reaction solution is water, and the mass percent concentration of the reagent is 10-35%; a needed amount of initiator is added to the mixed solution, the reaction is performed for 6-12 h, and then the constant-speed cooling medium stable in cooling performance can be obtained, wherein the adding mass ratio of sodium carboxymethyl cellulose to vinyl pyrrolidone or mixed monomer is (1:3)-(1:10). In the constant-speed cooling medium, sodium carboxymethyl cellulose, polyvinyl pyrrolidone and sodium polyacrylate are coupled to a same molecular structure through a grafting technology, so that in the process of using the constant-speed cooling medium, the sodium carboxymethyl cellulose, polyvinyl pyrrolidone and sodium polyacrylate of the constant-speed cooling medium can be consumed at an equal proportion.

Description

technical field [0001] The invention relates to a uniform cooling medium, in particular to a uniform cooling medium with stable cooling performance during use. Background technique [0002] Sand cooling, air cooling, fog cooling, etc. are often used for traditional post-forging cooling, which are slow and uneven, and it is difficult to ensure the purity of grain boundaries, and it is also difficult to effectively control defect structures such as banded structures, which seriously affect the final mechanical properties after heat treatment. In addition, these extensive cooling methods also have the problem of poor cooling uniformity, resulting in poor uniformity of the structure, which not only causes uneven hardness of the forging billet, but also makes it difficult to effectively control the deformation during the heat treatment process. The forced air cooling method cannot guarantee the uniformity of different workpieces in the same furnace and the windward and leeward si...

AI Technical Summary

Problems solved by technology

[0002] Sand cooling, air cooling, mist cooling, etc. are usually used for traditional post-forging cooling, which are slow and uneven, and it is difficult to ensure the purity of grain boundaries. It is also difficult to effectively control defect structures such as banded structures, which seriously affect the final mechanical properties after heat treatment.

In addition, these extensive cooling methods also have the problem of poor cooling uniformity, resulting in poor uniformity of the structure, which not only causes uneven hardness of the forging billet, but also makes it difficult to effectively control the deformation of the heat treatment process

The forced air cooling method cannot guarantee the uniformity of different workpieces in the same furnace and the windward and leeward sides of the same workpiece. At the same time, the air cooling speed will decrease rapidly with the decrease of the surface temperature of the forging billet, and the problem of poor cooling uniformity cannot be solved.

In order to overcome the problems of insufficient cooling capacity and uneven cooling of traditional cooling methods

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