Coated steel sheet with excellent heat dissipation

A technology for coating steel plates and steel plates, which is applied in coating, hot-dip plating process, and coating of superimposed layers, etc. It can solve the problems of increased noise and large heat dissipation, and achieves excellent heat dissipation and electromagnetic wave shielding Effect

Active Publication Date: 2007-04-11
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, in the case of personal computers (especially desktop personal computers), due to the significant increase in computing speed in recent years, the amount of heat generated from the CPU has increased significantly, and the dissipation of this heat has become a major problem.
Usually, fans are used for heat dissipation, but when the number of revolutions is increased to increase the air volume, there is a problem of increased noise

Method used

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  • Coated steel sheet with excellent heat dissipation
  • Coated steel sheet with excellent heat dissipation
  • Coated steel sheet with excellent heat dissipation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0170] (embodiment 1: the impact of plating seed on heat dissipation)

[0171] A coated steel sheet having a cold-rolled steel sheet (thickness: 0.6mm) having the chemical composition shown in Table 1 as a base material was used as a coating substrate, and on the surface of the substrate, one side (coating A coating film was formed on the other side (inner surface) without any treatment, and a coated steel sheet was produced, and the heat dissipation of the coated steel sheet and the heat radiation property of the inner surface were evaluated.

[0172] Table 1

[0173]

[0174] [plating species]

[0175] Two types of hot-dip galvanized steel sheet (symbol "GI") and alloyed hot-dip galvanized steel sheet (symbol "GA") were used.

[0176] Hot-dip galvanized steel sheet (GI)

[0177] Al concentration of coating: 0.40%

[0178] Plating adhesion: 60g / m on both the painted surface and the inner surface 2

[0179] Coating surface roughness: center l...

Embodiment 2

[0210] (Example 2: Effect of coating film thickness on heat dissipation)

[0211] The alloyed hot-dip galvanized steel sheet (GA) used in Example 1 was used as a coating substrate, and on the surface of the substrate, a coating film was formed on one side (coating surface) by the same method as in Example 1, The other side (inner side) is not subjected to any treatment, and the coated steel plate is manufactured. The heat dissipation of the coated steel sheet and the heat radiation of the front and back surfaces were evaluated. The evaluation method of heat dissipation and heat radiation is the same as in the case of Example 1.

[0212] Table 4 gives the results. In Table 4, paint 3 and paint 5 in the column of "inner layer coating film" correspond to paint 3 and paint 5 shown in Table 2.

[0213] test

[0214] As shown in Table 4, when the total thickness of the coating film (No. 17) is about 10 μm or more when the coating film (No. In the case of 11 to 15), if ...

Embodiment 3

[0215] (Example 3: Relationship between antirust treatment on the inner surface and electrical conductivity, heat dissipation and corrosion resistance)

[0216] Using the hot-dip galvanized steel sheet (GI) and the alloyed hot-dip galvanized steel sheet (GA) used in Example 1 as the coating base material, the coating primer was formed on the painted surface by the same method as in the case of Example 1. Treatment layer, inner layer coating film (use coating 3 of Table 2, thickness 5 μm) and outer layer coating film.

[0217] The inner surface was prepared separately as shown in the "inner surface" column of Table 5 described later. That is, it can be roughly divided into the following three types:

[0218] ・Plating surface (as plated) (No.18, 19)

[0219] ·Inorganic coating or inorganic-organic composite coating (No.22~47)

[0220] Coating film (A primer treatment was applied by the same method as in Example 1, and an inner layer coating film with a thickness of 5 μm was for...

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Abstract

Disclosed is a coated steel sheet with excellent heat dissipation which is also excellent in electrical conductivity and electromagnetic shielding performance. Such a coated steel sheet is preferably used for casings or heat dissipation plates of household electric appliances within which heat is generated. Specifically disclosed is a coated steel sheet having two or more layers of coating films formed on one side wherein the coated base is an alloyed hot-dip galvanized steel sheet (GA) and the thermal emissivity of the other side is not less than 40%. The other side of the coated steel sheet is preferably subjected to a rustproofing treatment for forming an inorganic coating or inorganic / organic composite coating, namely a chromate treatment, phosphate treatment, or treatment using silicon or silicate. An inner coating film may include one or both of titania and carbon black so that the coated steel sheet has improved heat dissipation.

Description

technical field [0001] The present invention relates to a coated steel sheet suitable for housings (outside boxes) and radiator plates of home electric appliances that generate heat inside. Background technique [0002] From the viewpoint of preventing global warming caused by carbon dioxide, energy conservation is being implemented in all types of equipment, whether industrial or life-related. For example, in an air conditioner, energy saving is achieved by increasing the size of radiators of indoor units and outdoor units, increasing air volume, and the like. [0003] Especially in recent years, refrigerators, personal computers, etc. have also increased in size due to the increase in the calculation speed of personal computers, and there is a tendency for the heat generated from compressors and CPUs (central processing units) to increase. scattered externally. [0004] In the case of a refrigerator, a radiator is used to dissipate heat generated by a compressor, and for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/08C23C2/28C23C2/26C23C28/00
CPCC23C2/26C23C28/345C23C28/00C23C28/321C23C28/36B32B15/08
Inventor 高桥克土岐保松本雅充河村保明吉冈明人高桥通泰植田尚孝
Owner NIPPON STEEL CORP
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