Title:
SCROLL MEMBER AND METHOD FOR PRODUCING SCROLL FORGED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2020/194906
Kind Code:
A1
Abstract:
The present invention provides a scroll member which has excellent mechanical strength at the root part of a blade, where the largest load is applied, and which is provided with an alumite film that has a sufficient hardness. The present invention has a configuration wherein an alumite film 3 that has a Vickers hardness of 400 or more is formed on the surface of a scroll forged article 2, which is formed of an aluminum alloy that contains from 8.0% by mass to 12.0% by mass of Si, from 0.1% by mass to 0.5% by mass of Fe, from 0.6% by mass to 1.1% by mass of Cu and from 0.2% by mass to 0.8% by mass of Mg, with the balance being made up of Al and unavoidable impurities; and the tensile strength in the plane direction of a bottom plate 21 of the scroll forged article is 350 MPa or more but less than 400 MPa.
Inventors:
KITAMURA KEIZO (JP)
Application Number:
PCT/JP2019/048674
Publication Date:
October 01, 2020
Filing Date:
December 12, 2019
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
C22C21/00; C22F1/04; F04C18/02; C22F1/00
Domestic Patent References:
| WO2001077398A1 | 2001-10-18 |
Foreign References:
| JP2004232087A | 2004-08-19 | |||
| JP3261056B2 | 2002-02-25 | |||
| JP4511156B2 | 2010-07-28 | |||
| JP2019060327A | 2019-04-18 |
Attorney, Agent or Firm:
SHIMIZU Yoshihito et al. (JP)
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