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Title:
CAST BASE FOR BIOMEDICAL USE FORMED OF COBALT/CHROMIUM-BASED ALLOY AND HAVING EXCELLENT DIFFUSION HARDENING TREATABILITY, SLIDING ALLOY MEMBER FOR BIOMEDICAL USE AND ARTIFICIAL JOINT
Document Type and Number:
WIPO Patent Application WO/2011/155063
Kind Code:
A1
Abstract:
A cast base for biomedical use, which is formed of a cobalt/chromium-based alloy and has excellent diffusion hardening treatability, characterized by containing 0.1 mass% or greater of nitrogen (N) and having a volume fraction of an fcc (face centered cubic lattice) phase in the metallic structure thereof of 50% or greater. Even in the case of subjecting the aforesaid cobalt/chromium-based alloy cast base in the as-cast-state, the structure of which is liable to be non-uniform, to a diffusion hardening treatment, it is possible to obtain a sliding alloy member for biomedical use, wherein a uniform hardened layer has been formed, by the diffusion hardening treatment. Thus, a sliding alloy member for biomedical use and so on, which can stably and continuously exhibit high strength, excellent abrasion resistance and, moreover, excellent corrosion resistance, can be provided.

Inventors:
ISHIMIZU, Keita (3-31 Miyahara 3-chome Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
石水 敬大 (〒03 大阪府大阪市淀川区宮原3丁目3-31 日本メディカルマテリアル株式会社内 Osaka, 〒5320003, JP)
Application Number:
JP2010/059946
Publication Date:
December 15, 2011
Filing Date:
June 11, 2010
Export Citation:
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Assignee:
JAPAN MEDICAL MATERIALS CORPORATION (3-31 Miyahara 3-chome, Yodogawa-ku Osaka-sh, Osaka 03, 〒5320003, JP)
日本メディカルマテリアル株式会社 (〒03 大阪府大阪市淀川区宮原3丁目3-31 Osaka, 〒5320003, JP)
ISHIMIZU, Keita (3-31 Miyahara 3-chome Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
International Classes:
C22C19/07; A61F2/30
Foreign References:
JP2010144184A2010-07-01
JP2007277710A2007-10-25
JP2009046760A2009-03-05
JP2009046758A2009-03-05
JPS5410224A1979-01-25
JP2008111177A2008-05-15
JP2005524772A2005-08-18
JP2007277710A2007-10-25
JP3471041B22003-11-25
Attorney, Agent or Firm:
UEKI, Kyuichi et al. (Fujita-Toyobo Building 9th floor, 1-16 Dojima 2-chome, Kita-ku, Osaka-sh, Osaka 03, 〒5300003, JP)
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Claims: