Title:
ROTOR FOR EDDY-CURRENT-TYPE DECELERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/218276
Kind Code:
A1
Abstract:
Provided is a rotor for an eddy-current-type deceleration device, whereby it is possible to suppress a decrease in the high-temperature strength of an eddy-current-type deceleration device associated with the cumulative operating time thereof. A cylinder part (11) of a rotor (10) for an eddy-current-type deceleration device according to the present embodiment has a chemical composition, in terms of mass%, of 0.05-0.15% C, 0.10-0.40% Si, 0.50-1.00% Mn, no more than 0.030% P, no more than 0.030% S, 0.20-1.00% Mo, 0.020-0.060% Nb, 0.040-0.080% V, 0.030-0.100% sol. Al, 0.0005-0.0050% B, 0.003-0.010% N, 0-0.20% Cu, 0-0.20% Ni, and 0-0.10% Cr, the remainder comprising Fe and impurities, the total area ratio of martensite and bainite in the microstructure of the cylinder part (11) is more than 95.0%, and the number density of carbides having an equivalent circle diameter of 100-500 nm therein is 0.35-075 carbides/µm2.
Inventors:
OTAKI NAO (JP)
OKADA HIROKAZU (JP)
NOGUCHI YASUTAKA (JP)
IMANISHI KENJI (JP)
TASAKA MASAHIRO (JP)
OKADA HIROKAZU (JP)
NOGUCHI YASUTAKA (JP)
IMANISHI KENJI (JP)
TASAKA MASAHIRO (JP)
Application Number:
PCT/JP2020/017151
Publication Date:
October 29, 2020
Filing Date:
April 21, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C21D9/00; C22C38/54; H02K49/10
Foreign References:
| JPH0849041A | 1996-02-20 | |||
| JPH09172770A | 1997-06-30 | |||
| JPH03247742A | 1991-11-05 | |||
| US6318518B1 | 2001-11-20 | |||
| JPH0849041A | 1996-02-20 |
Other References:
See also references of EP 3960893A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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