Title:
ALLOY SHEET AND PRODUCTION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/189576
Kind Code:
A1
Abstract:
This alloy sheet has a chemical composition which contains，by mass%, C: 0.0200% or less, Si: 0.02-2.00%, Mn: 0.02-2.00%, P: 0.050% or less, S: 0.0100% or less, Cr: 12.00-30.00%, Ni: 35.00-60.00%, N: 0.0200% or less, V: 0.02-1.00%, Nb: more than 2.00% to 3.50%, Al: more than 2.60% to 4.00%, and which may further optionally contain one or more of Ti, Mo, W, Cu, Co, B, Zr, Ca, and Mg, the balance being 10.00% or more of Fe and impurities. The alloy sheet has a microstructure containing austenite phases, wherein the average grain size of the austenite phases is 20 µm or greater, the average value of L1/L2, that is, the aspect ratio of the crystal grain of the austenite phases, is 1.0 to 3.0, and in the microstructure, the area ratio of γ' phases is 15.0% or less, and the 0.2% yield strength at room temperature is 400 MPa or greater.
Inventors:
SAWADA MASAYOSHI (JP)
ICHIKAWA FUMITAKA (JP)
ICHIKAWA FUMITAKA (JP)
Application Number:
PCT/JP2019/013608
Publication Date:
October 03, 2019
Filing Date:
March 28, 2019
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL CORP (JP)
International Classes:
C22C19/05; C22C30/00; C22C30/02; C22F1/10; C22F1/00
Domestic Patent References:
| WO2017119415A1 | 2017-07-13 | |||
| WO2013141030A1 | 2013-09-26 |
Foreign References:
| JP2017053006A | 2017-03-16 | |||
| JP2011127204A | 2011-06-30 | |||
| JP2001073053A | 2001-03-21 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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