Constant-speed cooling medium with extremely-stable cooling property

A cooling medium and stable technology, used in casting, metal thermal processing, cooling medium used in heat treatment, forging field, can solve problems such as insufficient cooling capacity, uneven cooling, etc., achieve low temperature sensitivity, ensure uniformity and Effects of stability, excellent cooling uniformity

Active Publication Date: 2014-01-15
NANJING KERUN LUBRICANTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to overcome the problems of insufficient cooling capacity and uneven cooling of traditional cooling methods, and provide a water-based uniform cooling medium

Method used

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  • Constant-speed cooling medium with extremely-stable cooling property
  • Constant-speed cooling medium with extremely-stable cooling property
  • Constant-speed cooling medium with extremely-stable cooling property

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] According to the above formula, the physical and chemical properties of the uniform cooling medium are shown in the following table:

[0023] Table 1 Physical and chemical indicators of uniform cooling medium

[0024]

[0025]

[0026] The test of the cooling characteristic of this patent adopts the international standard ISO9955, and the instrument uses the Swedish IVF cooling characteristic tester. image 3 , Figure 4 And Table 2 shows that the cooling capacity of 20% uniform cooling medium is between air and quenching oil, and above 500°C can meet the requirements of uniform cooling; Figure 5 It can be seen that the cooling characteristics of 20%-30% concentration are basically the same, and the cooling characteristics are not sensitive to the change of concentration, which can ensure the stability of cooling; Figure 6 It shows that the cooling performance of different liquid temperatures remains stable, especially above 500 °C, there is no obvious change....

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Abstract

The invention provides a constant-speed cooling medium with an extremely-stable cooling property, which is characterized in that the constant-speed cooling medium is an aqueous solution of high molecular polymers, the aqueous solution of the high molecular polymers comprises 5-15% of polyvinylpyrrolidone (PVP), 3-8% sodium carboxymethylcellulose (CMC) and 0-3% of sodium polyacrylate (ACR) and further comprises 3-8% of a defoamer, a rust inhibitor and a microbicide, and water in balancing amount. When a forged product is cooled in the constant-speed cooling medium, the cooling process of the surface and the core of the product can be coordinated, so as to effectively control the problem of secondary segregation after forging and solve the problems such as thick and big core structure to prepare for the subsequent heat treatment. Besides, the constant-speed cooling medium has the characteristics of cleanness, environmental friendliness and no pollution, improves the operational environment of a production site and ensures safe production. The conventional extensive cooling mode is replaced, the energy consumption is reduced, and the cost input of related auxiliary equipment is reduced.

Description

technical field [0001] This patent relates to the technical field of metal thermal processing, specifically to the field of cooling media used in casting, forging, and heat treatment processes. Background technique [0002] At present, most of the post-casting, post-forging, and normalizing cooling methods adopt extensive cooling methods such as sand cooling, pit cooling, air cooling, air cooling, and fog cooling. Coarse particles and other defects seriously affect the final mechanical properties after heating. The traditional method also has the problem of poor cooling uniformity, which makes the uniformity of the forging billet poor. First, it will cause the deformation of the heat treatment process to be difficult to effectively control. Second, it will cause the phenomenon of uneven hardness of the forging billet, which will affect the machining performance of the product. It is not conducive to the promotion and development of dry cutting technology. Typical organizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/10C21D1/60
Inventor 聂晓霖
Owner NANJING KERUN LUBRICANTS
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