Superficial character fine Fe-Ni kind camouflage plate

A technology with excellent surface properties, applied in the field of Fe-Ni shadow mask materials, can solve the problems of increasing the total amount of oxides, surface properties or etching and perforation are not necessarily sufficient, and achieve the effect of improving pixel quality

Inactive Publication Date: 2007-05-23
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

However, when carrying out its specific implementation, since the oxygen concentration reaches about 30ppm or more, the total amount of oxides increases, and the surface texture or etching perforation is not necessarily sufficient.
In addition, in the adjustment of the target inclusion form, it is necessary to limit the total Al content in the Fe-Ni alloy to 0.005% by mass or less, so there is room for improvement in terms of manufacturing cost.

Method used

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  • Superficial character fine Fe-Ni kind camouflage plate

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Embodiment

[0044] Alloy ingots having the composition shown in Table 1 were produced by applying a generally performed refining process using an Al deoxidizer. In addition, Sample Nos. 1 to 6 are materials of the present invention to which addition of Mg was applied in the deoxidation step. Sample Nos. 7 to 8 are conventional materials.

[0045] No.

[0046] * The remainder contains unavoidable impurities

[0047] As can be seen from Table 1, the addition of Mg, which is a strong deoxidizing element, makes the oxygen content of the material of the present invention more stable and lower than that of the conventional material. This shows that the addition of Mg reduces the total amount of oxides that are detrimental to the surface properties and etched porosity, thereby bringing about these quality improvement effects.

[0048] Then, hot forging and hot rolling were performed on these alloy ingots to obtain a 2.5 mm thick cold rolling steel strip. Thereafter, 50 g of samples...

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PUM

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Abstract

To provide an Fe-Ni based shadow mask material in which occurrence of roll marks is suppressed and surface characteristics are improved.

Description

technical field [0001] The present invention relates to an Fe-Ni-based shadow mask material having excellent surface properties by suppressing the generation of roll marks during cold rolling. Background technique [0002] Conventionally, Fe-Ni-based materials for shadow masks have been required to have strict quality. For example, since oxygen is a cause of formation of various oxide-based inclusions, reduction control has been performed. The treatment for reducing oxygen is mainly a refining process, which is a process of degassing by vacuum refining or separation and removal of deoxidation products (oxides) generated by adding a deoxidizer to the melt. In addition, in deoxidation refining using a deoxidizer, Al (aluminum) is often used because it has a strong deoxidation ability. [0003] In the deoxidation treatment using a deoxidizer, although the resulting deoxidation product is removed from the melt by slag, etc., as a result, when a very small amount of the deoxidat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/08C22C38/00C22C38/10
Inventor 谷口彻藤本馨三嶋节夫
Owner HITACHI METALS LTD
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