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Material heating method

A heating method and heating furnace technology are applied in the field of material heating to achieve the effect of improving surface quality

Inactive Publication Date: 2014-04-16
HYUNDAE STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a drawback of scale that will not be removed by the scale remover

Method used

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  • Material heating method
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Embodiment Construction

[0024] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings are not drawn to precise scale and the thickness of lines or the size of elements may be exaggerated for descriptive convenience and clarity. In addition, the terms used herein are defined by considering the functions of the present invention and may be changed according to user's or operator's habit or intention. Accordingly, definitions of terms should be made in light of all disclosures set forth herein.

[0025] figure 1 is a schematic diagram showing a temperature profile of a material and a temperature of a heating furnace according to an embodiment of the present invention. figure 2 is a sectional view of a heating furnace according to an embodiment of the present invention. image 3 is a perspective view of a steel rolling apparatus according to an embodiment of the present invention. Figure 4 is a cross-s...

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Abstract

The material heating method of the present invention comprises: a step in which a silicon-containing carbon steel material is charged into a heating furnace; a step in which the material is pre-heated; a first heating step in which the temperature of the material is raised; a second heating step in which the temperature of the heating furnace is lowered such that the temperature difference between the surface and the interior of the material is reduced; a third heating step in which the temperature of the material is raised; and a soaking step in which the temperature difference between the surface and the interior of the material is reduced; and, here, the temperature of the material in the heating furnace is maintained at below the melting point of fayalite.

Description

technical field [0001] The present invention relates to a material heating method, and more particularly, to a material heating method capable of improving the surface quality of a material. Background technique [0002] In the case of sheets that are used for vehicle exterior sheets and are used for domestic products, surface quality is an important controlling factor, and scale defects are considered to be serious problems of hot-rolled steel sheets. Recently, automobile manufacturers and companies that handle various electronic products have delicate requirements for the surface quality of hot-rolled steel sheets. [0003] In order to improve the surface quality, a descaling machine is installed to remove the scale on the hot rolled steel sheet during the hot rolling process. However, there is the drawback of scale that is not removed by scale removers. [0004] The above-described configurations are related arts for helping the understanding of the present invention, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/34F27B9/36
CPCC21D11/00F27B9/40F27B9/36C21D9/0056C21D1/26C21D6/008F27B9/20F27D2019/0003C21D1/34
Inventor 林甲洙朴永国李官炯林钟协
Owner HYUNDAE STEEL CO LTD