AUSTENITIC Fe-Ni-Cr ALLOY HAVING EXCELLENT OXIDATION RESISTANCE AND METHOD FOR PRODUCING SAME

Title:

AUSTENITIC Fe-Ni-Cr ALLOY HAVING EXCELLENT OXIDATION RESISTANCE AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2023/228699

Kind Code:

A1

Abstract:

The present invention is an austenitic Fe-Ni-Cr alloy having excellent oxidation resistance under harsh high temperatures, the alloy comprising, by mass%, C: 0.004 to 0.13%; Si: 0.15 to 1.0%; Mn: 0.03 to 2.0%; P: ≤ 0.040%; S: ≤ 0.003%; Ni: 20.0 to 38.0%; Cr: 18.0 to 28.0%; Mo: ≤ 1.0%; Cu: ≤ 1.0%; N: ≤ 0.03%; B: ≤ 0.01%; Al: 0.10 to 1.0%; Ti: 0.10 to 1.0% and/or Zr: 0.01 to 0.6%; O: 0.0002 to 0.0030%; Ca: ≤ 0.002%; a total weight of at least one of La, Ce, and Y: 0.001 to 0.010%; and Fe and inevitable impurities as the balance. The austenitic Fe-Ni-Cr alloy satisfies specific relational expressions (1) and (2).

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Inventors:

TSUTSUMI FUMIHITO (JP)
YABE MUROTSUNE (JP)

Application Number:

PCT/JP2023/017180

Publication Date:

November 30, 2023

Filing Date:

May 02, 2023

Export Citation:

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Assignee:

NIPPON YAKIN KOGYO CO LTD (JP)

International Classes:

C21C7/00; C21C7/04; C22C30/02; C22C38/00; C22C38/58; C23C8/18

Domestic Patent References:

WO2018066579A1	2018-04-12
WO2010113843A1	2010-10-07

Foreign References:

JP2014031526A

2014-02-20

Attorney, Agent or Firm:

SUENARI, Mikio (JP)

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