MARTENSITIC STAINLESS STEEL WITH IMPROVED STRENGTH AND CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

Title:

MARTENSITIC STAINLESS STEEL WITH IMPROVED STRENGTH AND CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2022/139214

Kind Code:

A1

Abstract:

Disclosed is a martensitic stainless steel with improved strength and corrosion resistance. The disclosed martensitic stainless hot-rolled annealed steel sheet comprises, in weight%, C: 0.3-0.5%, N: 0.01-0.025%, Si: 0.3-0.5%, Mn: 0.4-0.6%, Cr: 13.1-14.5%, Mo: 0.95-1.10%, V: 0.05-0.3%, Ni: 0.3-0.5%, Cu: 0.001-0.5%, and the balance being Fe and inevitable impurities, and satisfies formula (1). Formula (1): 16.4 ≤ (Cr+3.3Mo+16N)*(Mo+V) ≤ 23.3, wherein Cr, N, Mo, and V denote the contents (weight%) of respective elements.

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Inventors:

SONG BYOUNG-JUN (KR)
KWON YOUNGJIN (KR)
JO GYUJIN (KR)
CHU NAYEON (KR)

Application Number:

PCT/KR2021/017715

Publication Date:

June 30, 2022

Filing Date:

November 29, 2021

Export Citation:

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Assignee:

POSCO (KR)

International Classes:

C22C38/46; C21D8/02; C21D9/46; C22C38/42; C22C38/44

Domestic Patent References:

WO2020245285A1

2020-12-10

Foreign References:

KR100210522B1	1999-07-15
JP2020050916A	2020-04-02
CN106086631A	2016-11-09
US20200232076A1	2020-07-23

Attorney, Agent or Firm:

SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)

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