Far-infrared multistage heating furnace for hot-pressed steel plate

A hot-pressed steel plate and far-infrared ray technology, which is applied in electric furnace heating, heat treatment furnace, ohmic resistance heating, etc., can solve the problems of reduced pressing formability and inability to manufacture pressed formed products, so as to improve heat uniformity and reduce maintenance costs , the effect of improving the operating rate

Active Publication Date: 2017-04-19
NIPPON STEEL & SUMIKIN TEXENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the press formability of the steel sheet decreases as the strength increases
Therefore, it is impossible to manufacture a high-strength press-formed product having a desired shape

Method used

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  • Far-infrared multistage heating furnace for hot-pressed steel plate
  • Far-infrared multistage heating furnace for hot-pressed steel plate
  • Far-infrared multistage heating furnace for hot-pressed steel plate

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Embodiment Construction

[0053] The present invention is described with reference to the drawings.

[0054] 1. The structure of the furnace frame 12

[0055] figure 2 It is an overall view showing the far-infrared multi-layer heating furnace 10 of the present invention, and is an explanatory view showing outer shell panels 11 a , 11 b , and 11 c and a furnace body frame 12 .

[0056] image 3 It is an explanatory diagram of the far-infrared multilayer heating furnace 10 of the present invention, image 3 (a) is an explanatory diagram showing the appearance of the far-infrared multilayer heating furnace 10, image 3 (b) is an explanatory diagram showing the heating units 13-1 to 13-6, image 3 (c) is image 3 A-A sectional view in (b), image 3 (d) is an explanatory diagram showing the heating units 13-1 to 13-6 in a state where the cover blocks 16c, 16d are removed, image 3 (e) is image 3 B-B sectional view in (b), image 3 (f) is a perspective view showing the steel plate support member 3...

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Abstract

The purpose of the present invention is to provide stable support over an extended period of time to a hot-pressed steel plate which is accommodated within a far-infrared multistage heating furnace, using steel plate support members that have a small planar projected area and minimized thermal deformation. This far-infrared multistage heating furnace has: a heating unit and a ceiling unit provided in multiple stages in the vertical direction, the heating unit and ceiling unit accommodating a hot-pressed steel plate comprising an aluminum-plated steel plate or a zinc-plated steel plate; and far-infrared heaters arranged inside the heating unit and the ceiling unit, the far-infrared heaters heating the hot-pressed steel plate to at least the Ac3 transition point but no higher than 950 DEG C. Within the heating unit are arranged steel plate support members for supporting the hot-pressed steel plate through point contact or line contact against the hot-pressed steel plate, the steel plate support members being supported so as to be capable of expanding and contracting in the longitudinal direction due to thermal expansion or thermal shrinkage.

Description

technical field [0001] The present invention relates to a far-infrared multi-layer heating furnace for hot-pressing steel sheets, and more specifically, to a furnace capable of heating hot-pressing steel sheets, for example, to Ac 3 Far-infrared multi-layer heating furnace above 100°C and below 950°C. Background technique [0002] High-strength steel sheets are widely used as materials for structural members of automobile bodies in order to achieve greater strength, stiffness, and improved crash safety of automobile bodies, and to improve fuel efficiency due to weight reduction of automobile bodies. However, the press formability of steel sheets decreases with increasing strength. Therefore, a high-strength press-formed product having a desired shape cannot be produced. [0003] In recent years, a hot press method (also referred to as a hot stamping method) has been used as a press forming method for structural members of automobile bodies. In the hot pressing method, aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/00C21D1/34F27D5/00
CPCF27B5/02F27B5/06F27D5/0006C21D1/34C21D9/46F27D11/12F27B9/068H05B3/009
Inventor 桑山真二郎
Owner NIPPON STEEL & SUMIKIN TEXENG
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