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Ferritic stainless steel sheet having excellent anti-bacterial activity, and method for producing same

A technology of stainless steel plate and manufacturing method, which is applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of antibacterial and softening, peeling, antibacterial reduction, etc., and achieve excellent antibacterial, good antibacterial, Antibacterial effect of softening

Active Publication Date: 2015-09-02
NIPPON STEEL STAINLESS STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it has the disadvantage that Cu is easily peeled off from the steel surface, for example, when the surface is rubbed with a wire brush, steel scrubbing brush, etc., the Cu on the surface is chipped off, thereby reducing the antibacterial property.
However, the technology related to the softening of cold-rolled raw materials has not been disclosed
[0018] As mentioned above, there has been no disclosure of a technology for both antimicrobial properties and softening of Cu-containing ferritic stainless steel.

Method used

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  • Ferritic stainless steel sheet having excellent anti-bacterial activity, and method for producing same
  • Ferritic stainless steel sheet having excellent anti-bacterial activity, and method for producing same
  • Ferritic stainless steel sheet having excellent anti-bacterial activity, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] The steel whose composition is shown in Table 1A and Table 1B is smelted by vacuum melting, hot rolled at a heating temperature of 1100-1350°C and a final hot rolling temperature of 700-1020°C, and coiled at a coiling temperature of 400-700°C Roll down. Next, the hot-rolled sheet was annealed at 980° C. for 10 seconds in the air, and then ordinary pickling was performed. Next, cold rolling and final annealing are performed to obtain a cold-rolled sheet having a thickness of 1.0 to 1.3 mm. Thereafter, pickling is performed in sulfuric acid and hydrofluoric nitric acid at 40 to 80° C. to produce a ferritic stainless steel plate. In addition, in Table 1A and Table 1B, the column marked with "-" shows that the said element was not added, and therefore it was not measured.

[0149] The following evaluations were performed on the obtained ferritic stainless steel sheets. In addition, in this Example, in order to confirm whether favorable antimicrobial property is expressed...

Embodiment 2

[0161] Next, in order to confirm the softening effect of this embodiment, the conditions of the hot-rolled sheet annealing step and the final annealing step were changed to the conditions shown in Table 15 during the production of some steel types in Table 1A and Table 1B.

[0162] In addition, in Example 2, the hot rolling process, the cold rolling process, and the final pickling process were implemented under the conditions within the range of this embodiment.

[0163] The cross-sectional hardness and corrosion resistance were evaluated for each of the manufactured steel sheets. In addition, the cross-sectional hardness was measured by the following method. Five locations were arbitrarily selected in the vicinity of the plate thickness center, Vickers hardness tests were performed on the selected locations, and the average value thereof was set as the measured value of the cross-sectional hardness. Corrosion Resistance In accordance with JIS Z2371, a 308K 5% NaOH solution w...

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PUM

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Abstract

A ferritic stainless steel sheet. An first embodiment of the ferritic stainless steel sheet contains 0.1 to 5.0 mass% inclusive of Cu and has a Cu-rich layer on the surface thereof, wherein the maximum concentration of Cu (Cm) in the Cu-rich layer is 10.0 mass% or more and the Fe / Cr ratio at a position at which the maximum concentration of Cu (Cm) is stood at, as observed from the surface of the steel sheet in the thickness direction, is 2.4 or more. A second embodiment of the ferritic stainless steel sheet contains 0.1 to 5.0 mass% inclusive of Cu and has a Cu-rich layer on the surface thereof, wherein the maximum concentration of Cu (Cm) in the Cu-rich layer is 18.0 mass% or more.

Description

technical field [0001] The present invention relates to a ferritic stainless steel plate excellent in antibacterial properties and a method for producing the same. A ferritic stainless steel plate preferably used as a raw material for sanitation equipment such as toilet seats, medical equipment, and heating equipment, and building materials, and a manufacturing method thereof. [0002] This application claims priority based on Japanese Patent Application No. 2012-282843 filed on December 26, 2012 and Japanese Patent Application No. 2013-148950 filed on July 17, 2013, and the contents thereof are incorporated herein. Background technique [0003] Ferritic stainless steel sheets have been widely used in household appliances such as kitchen equipment such as sinks and side panels of microwave ovens. Recently, it is also used in medical equipment such as sinks and interior building materials such as railings from the viewpoint of cleanliness, decorative appearance, and aestheti...

Claims

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Application Information

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IPC IPC(8): C22C38/00C21D9/46C22C38/20C22C38/58C23G1/08
CPCC22C38/32C22C38/40C22C38/02C22C38/20C22C38/004C22C38/04C21D6/002C22C38/005C22C38/06C22C38/26C22C38/24C21D9/46C22C38/58C22C38/22C22C38/48C22C38/008C22C38/001C22C38/00C21D2201/00C22C38/50C22C38/002C22C38/30C22C38/28
Inventor 盛田智彦秦野正治石丸咏一朗井内浩一山岸昭仁
Owner NIPPON STEEL STAINLESS STEEL CORP
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