PRECIPITATION HARDENING MARTENSITIC STAINLESS STEEL HAVING EXCELLENT WELDABILITY, AND METHOD FOR PRODUCING SAME

Title:

PRECIPITATION HARDENING MARTENSITIC STAINLESS STEEL HAVING EXCELLENT WELDABILITY, AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2023/022130

Kind Code:

A1

Abstract:

A precipitation hardening martensitic stainless steel which contains specific alloy components, with the balance being made up of Fe and unavoidable impurities, while satisfying formula (1) and having a δ cal. (%) of 1.0 to 9.0 as calculated by formula (2). This precipitation hardening martensitic stainless steel has a high level of strength and improved weldability. (1): Sn + 0.009Cu ≤ 0.06 (2): δ cal. (vol. %) = 4.3 × (1.3Si + Cr + Mo + 2.2Al + Ti + Nb) – 3.9(30C + 30N + Ni + 0.8Mn + 0.3Cu) – 31.5

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Inventors:

JI XIN (JP)
MAEDA TAIKI (JP)
WEI FUGAO (JP)
TODOROKI HIDEKAZU (JP)

Application Number:

PCT/JP2022/030884

Publication Date:

February 23, 2023

Filing Date:

August 15, 2022

Export Citation:

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Assignee:

NIPPON YAKIN KOGYO CO LTD (JP)

International Classes:

C21C7/00; C21D8/02; C22C38/00; C22C38/50; C22C38/54

Foreign References:

JP2021503545A

2021-02-12

Attorney, Agent or Firm:

SUENARI, Mikio (JP)

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