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Steel sheet having high AI content and exhibiting excellent workability and method for production thereof

A technology with excellent processability and manufacturing methods, which is applied in the direction of manufacturing tools, separation methods, chemical instruments and methods, etc., can solve the problems of cost increase

Inactive Publication Date: 2010-02-17
NIPPON STEEL CHEM &MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this manufacturing method, cold rolling and annealing are repeated after diffusion heat treatment, so the cost increases

Method used

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  • Steel sheet having high AI content and exhibiting excellent workability and method for production thereof
  • Steel sheet having high AI content and exhibiting excellent workability and method for production thereof
  • Steel sheet having high AI content and exhibiting excellent workability and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] In Example 1, the workability of the high-Al steel sheet after the diffusion heat treatment was investigated relative to the Al concentration of the base steel sheet. Regarding the texture, the degree of concentration of the {222} crystal plane parallel to the surface of the steel sheet and the degree of concentration of the {200} crystal plane parallel to the surface of the steel sheet were determined by X-ray diffraction. The measurement method is as described above. Table 1 shows the results.

[0080] Vacuum melting method was used to smelt the alloys containing Al concentrations of 0%, 1%, 3%, 3.5%, 4.3%, 5%, 5.5%, 6%, 6.4%, 7.0%, in addition to C : 0.007%, Si: 0.1%, Mn: 0.2%, Cr: 20%, Zr: 0.04%, La: 0.1%, balance: Fe and unavoidable impurities. After being hot-rolled to a thickness of 3.2 mm, it was cold-rolled to a thickness of 0.4 mm. The material containing 0 to 6% of Al could be produced without problems, but the material containing 6.4% of Al partially deve...

Embodiment 2

[0085] In Example 2, the effect of the reduction ratio of the laminate on the workability of the steel sheet after the diffusion heat treatment with respect to the average Al concentration after the diffusion heat treatment was investigated. By vacuum melting, a steel ingot containing C: 0.05%, Si: 0.3%, Mn: 0.2%, Al: 4.5%, Cr: 17%, balance: Fe and unavoidable impurities in mass % was melted. After the plate thickness was adjusted to 3 mm by hot rolling, it was rolled to a predetermined plate thickness by cold rolling. Al was attached by hot-dip plating. The composition of the coating bath was 95% Al-5% Si, and Al alloy was deposited on both sides of the steel sheet. Then, it was cold-rolled to the thickness of the laminated body after cold-rolling described in Table 2. The thickness of the base steel sheet before the Al alloy is attached and the thickness of the Al alloy to be attached are respectively adjusted so that the average Al concentration after the diffusion heat t...

Embodiment 3

[0094] In Example 3, the workability of the steel sheet after diffusion heat treatment was investigated when the rolling reduction of the laminate was kept constant with respect to the average Al concentration and the thickness of the laminate after cold rolling was different.

[0095] Through vacuum melting, smelting contains C: 0.01%, Si: 0.1%, Mn: 0.2%, Cr: 20%, Ti: 0.1%, Al: 5%, La: 0.03%, Ce: 0.03% in mass % , Balance: steel ingot with the composition of Fe and unavoidable impurities. After being hot-rolled to a thickness of 3.2 mm, it is cold-rolled to a predetermined plate thickness. Al was attached by hot-dip plating. The composition of the coating bath was 90% Al-10% Si, and Al alloy was deposited on both sides of the steel sheet. Then it was cold-rolled to the laminate thickness described in Table 3. Here, the thickness of the steel sheet before the Al alloy was deposited and the amount of the Al alloy deposited were adjusted in the same manner as in Example 2 so ...

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Abstract

A steel sheet having a high Al content, characterized in that it has an Al content of 6.5 to 10 mass %, and the accumulation degree of the {222} face of a-Fe crystal to the surface of the steel sheetis 60 % to 95 % and / or the accumulation degree of the {200} face of the crystal to the surface is 0.01 to 15 %; a method for producing the above steel sheet having a high Al content on a large scale at a low cost; a metal foil having a high Al content; a method for producing the metal foil; and a metal carrier which uses the metal foil having a high Al content. The above steel sheet having a highAl content exhibits excellent workability.

Description

technical field [0001] The present invention relates to a high Al steel plate, a high Al metal foil, and their manufacturing methods. Background technique [0002] An Al-containing steel sheet in which aluminum is added to iron is an alloy with high-temperature oxidation resistance and high electrical resistance. By increasing the Al concentration, it is expected that various properties of these materials will be improved, but at the same time, the toughness will be lowered, and the workability will be remarkably lowered. Therefore, under the usual steelmaking and rolling processes, the maximum Al concentration in industrially mass-produced occasions is limited to 6.5% by mass. Therefore, it is desired to obtain a production that improves workability (that is, workability) and contains more Al. Mass production technology of Al high Al steel plate. [0003] As a prior art for improving the workability of high Al steel sheets, Japanese Patent Publication No. 6-8486 describes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/46B01D53/86B01J35/04B21B3/00C22C38/00C22C38/06C22C38/60C23C2/12C23C2/28
Inventor 稻熊彻小林孝之坂本广明
Owner NIPPON STEEL CHEM &MATERIAL CO LTD
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