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Austenitic stainless steel having excellent processability and surface characteristics, and manufacturing method therefor

A technology of austenitic stainless steel and surface characteristics, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the problems of machining cracks and chronic surface deterioration, and achieve the effect of improving workability

Active Publication Date: 2019-09-10
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in STS 304 steel, machining cracks and surface deterioration often occur as chronic problems

Method used

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  • Austenitic stainless steel having excellent processability and surface characteristics, and manufacturing method therefor
  • Austenitic stainless steel having excellent processability and surface characteristics, and manufacturing method therefor
  • Austenitic stainless steel having excellent processability and surface characteristics, and manufacturing method therefor

Examples

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Embodiment approach

[0042] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. These embodiments are provided to fully convey the concept of the disclosure to those of ordinary skill in the art. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. In the drawings, in order to clarify the description of the present disclosure, parts irrelevant to the description are omitted, and the size of elements may be exaggerated for clarity.

[0043] The austenitic stainless steel having excellent workability and surface properties according to an embodiment of the present disclosure may contain: by weight %, 0.005% to 0.15% of carbon (C), 0.1% to 1.0% of silicon (Si) , 0.1% to 2.0% of manganese (Mn), 6.0% to 10.5% of nickel (Ni), 16% to 20% of chromium (Cr), 0.005% to 0.2% of nitrogen (N), and the rest of iron ( Fe) and other unavoidable...

Embodiment approach

[0104] Austenitic stainless steel slabs containing the compositions of Inventive Examples 1 to 9 and Comparative Examples 1 to 6 shown in Table 1 below were continuously cast. Thereafter, the billets were hot-rolled and cold-rolled at a total reduction ratio of 50% to prepare cold-rolled steel sheets.

[0105] Table 1

[0106] sample C Si mn Ni Cr Cu Mo N Invention Example 1 0.115 0.6 0.2 6.8 17.3 0.61 0.19 0.05 Invention Example 2 0.109 0.6 0.8 6.7 17.2 0.59 0.14 0.05 Invention Example 3 0.108 0.2 1.6 6.7 17.2 1.00 0.09 0.05 Invention Example 4 0.108 0.9 1.9 6.7 16.2 1.60 0.09 0.05 Invention Example 5 0.108 0.6 0.9 9.8 19.6 1.00 0.09 0.05 Invention Example 6 0.108 0.6 1.0 6.6 17.2 0.12 0.04 0.04 Invention Example 7 0.009 0.6 0.9 6.6 17.2 2.05 0.04 0.14 Invention Example 8 0.115 0.6 0.9 6.6 17.2 2.94 0.04 0.04 Invention Example 9 0.115 0.6 0.9 ...

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Abstract

An austenitic stainless steel having excellent processability and surface characteristics, and a manufacturing method therefor are disclosed. The disclosed austenitic stainless steel comprises, by wt%, 0.005-0.15% of C, 0.1-1.0% of Si, 0.1-2.0% of Mn, 6.0-10.5% of Ni, 16-20% of Cr, 0.005-0.2% of N, and the balance of Fe and inevitable impurities, and the Ni surface negative segregation thereof defined by the following formula (1) is 0.6-0.9. (CNi-Min) / (CNi-Ave) - formula (1). Here, CNi-Min is the minimum concentration of Ni on the surface and CNi-Ave is the average concentration of Ni on the surface.

Description

technical field [0001] The present disclosure relates to austenitic stainless steel and a manufacturing method thereof, and more particularly, to an austenitic stainless steel having excellent workability and surface properties and a manufacturing method thereof. Background technique [0002] The present disclosure relates to stainless steel used for sinks and the like, and more particularly, to austenitic stainless steel having excellent workability and surface properties that do not generate defects such as cracks and surface defects after being processed into sinks Such as stripes, protrusions, etc. [0003] The sink bowl of a kitchen sink is usually made of stainless steel. A specific general-purpose stainless steel is widely used because it has no problem in formability when applied to the shape of a general water tank. [0004] Recently, however, many attempts have been made to design sinks of various and complex shapes in order to increase market competitiveness. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/40C22C38/58C22C38/02C22C38/00C21D8/02C22C38/44C22C38/42B22D11/22C21D9/46
CPCC21D1/18C21D6/004C21D8/02C21D8/0205C21D8/0226C21D8/0236C21D9/46C22C38/001C22C38/02C22C38/04C22C38/42C22C38/44C22C38/58B22D11/002B22D11/225C21D9/0081C22C38/40C22C38/004B22D11/22C21D2211/001C21D6/005C21D6/008
Inventor 姜亨求李尚辰沈在弘李龙宪田锺尽
Owner 浦项股份有限公司
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