HIGH-STRENGTH FERRITIC STAINLESS STEEL FOR CLAMP, AND MANUFACTURING METHOD THEREFOR

Title:

HIGH-STRENGTH FERRITIC STAINLESS STEEL FOR CLAMP, AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2021/125564

Kind Code:

A1

Abstract:

Disclosed are high-strength ferritic stainless steel STS430, which has yield strength of 350MPa or greater and can be applied to a clamp of a vehicle or a common hose, and a manufacturing method therefor. A high-strength ferritic stainless steel for a clamp, according to one embodiment of the present invention, comprises, by wt%, 0.04-0.1% of C, 0.2-0.6% of Si, 0.01-1.5% of Mn, 14.0-18.0% of Cr, 0.005-0.2% of Al, 0.005-0.2% of V, 0.02-0.1% of N, and the balance of Fe and inevitable impurities, satisfies equations (1) and (2), and has at least 2.5×10 6/㎟ precipitates having a mean diameter of 0.5㎛ or less. (1) 0.35% ≤ Si+Al+V ≤ 0.6% (2) 0.09% ≤ C+N ≤ 0.12%

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Inventors:

PARK SOO-HO (KR)
MIN HYUNWOONG (KR)
PARK JAE-SEOK (KR)

Application Number:

PCT/KR2020/015781

Publication Date:

June 24, 2021

Filing Date:

November 11, 2020

Export Citation:

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Assignee:

POSCO (KR)

International Classes:

C21D8/02; B21B1/24; B21B3/00; C22C38/24; C22C38/38

Foreign References:

JP2007119848A	2007-05-17
JP2001107149A	2001-04-17
JP2005298854A	2005-10-27
KR101828282B1	2018-02-14
KR101614614B1	2016-04-22

Other References: