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

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 (JP)
NANBA SHIGENOBU (JP)

Application Number:

PCT/JP2010/059946

Publication Date:

December 15, 2011

Filing Date:

June 11, 2010

Export Citation:

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Assignee:

JAPAN MEDICAL MATERIALS CORP (JP)
ISHIMIZU KEITA (JP)
NANBA SHIGENOBU (JP)

International Classes:

C22C19/07; A61F2/30

Foreign References:

JP2010144184A	2010-07-01
JP2007277710A	2007-10-25
JP2009046760A	2009-03-05
JP2009046758A	2009-03-05
JPS5410224A	1979-01-25
JP2008111177A	2008-05-15
JP2005524772A	2005-08-18
JP2007277710A	2007-10-25
JP3471041B2	2003-11-25

Other References: