HOT-FORGED TIAL-BASED ALLOY, METHOD FOR PRODUCING SAME, AND USES FOR SAME

Title:

HOT-FORGED TIAL-BASED ALLOY, METHOD FOR PRODUCING SAME, AND USES FOR SAME

Document Type and Number:

WIPO Patent Application WO/2020/129840

Kind Code:

A1

Abstract:

The present invention is a TiAl-based alloy containing 41–43 atomic% Al, 0–2.5 atomic% Fe, 0–2.5 atomic% Ni, 0–2.0 atomic% Mo, 0–2.0 atomic% W, 0–4.5 atomic% Cr, 0–5.5 atomic% Mn, 0–10 atomic% V, 0–10 atomic% Nb, and 0.3–0.7 atomic% C, with the remainder consisting of Ti and unavoidable impurities, wherein: the alloy element parameter "P = (41.5 – Al)/3 + Fe + Ni + Mo + W + 0.5 Cr + 0.4 Mn + 0.2 V + 0.2 Nb – C" is in a compositional range of 1.1–1.9; and the alloy has a microstructure formed from a γ-phase occupying 5–30 area%, a β-phase occupying 0.5–5 area%, and a lamellar structure occupying the remainder.

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Inventors:

TETSUI TOSHIMITSU (JP)

Application Number:

PCT/JP2019/048925

Publication Date:

June 25, 2020

Filing Date:

December 13, 2019

Export Citation:

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Assignee:

NAT INST MATERIALS SCIENCE (JP)

International Classes:

C22C14/00; C22F1/18; F01D25/00; F02B39/00; F02C7/00; C22F1/00

Domestic Patent References:

WO2014203714A1

2014-12-24

Foreign References:

JP2002356729A	2002-12-13
KR20180068816A	2018-06-22
JP2018238989A	2018-12-21
JP4209092B2	2009-01-14
JP4287991B2	2009-07-01
JPH0649565B2	1994-06-29
JP2015151612A	2015-08-24

Other References: