Title:
HARD SINTERED ALLOY
Document Type and Number:
WIPO Patent Application WO/1998/005802
Kind Code:
A1
Abstract:
A hard sintered alloy having not only a wear resistance, a high corrosion resistance and a heat resistance but also a sufficiently high strength and a high tenacity in a wide temperature region from normal temperature to a high temperature is provided. In a sintered alloy comprising a hard phase containing mainly 35-95 % of Mo�2?NiB�2? type complex boride, and a binding phase of hard phase binding Ni group constituting the rest, 0.1-8 % of Mn with respect to the whole composition is added, whereby a hard sintered alloy having a high strength, a high tenacity and a high corrosion resistance is obtained. Furthermore, the addition of W serves to further improve the wear resistance and mechanical characteristics, the addition of Cr and/or V the corrosion resistance and mechanical characteristics, the addition of Cu the corrosion resistance, the addition of Co the oxidation resistance and high temperature characteristics, and the addition of Nb, Zr, Ti, Ta and Hf the mechanical characteristics and corrosion resistance.
Inventors:
YAMAZAKI YUJI (JP)
TAKAGI KEN-ICHI (JP)
NAKANO KAZUNORI (JP)
TAKAGI KEN-ICHI (JP)
NAKANO KAZUNORI (JP)
Application Number:
PCT/JP1997/002722
Publication Date:
February 12, 1998
Filing Date:
August 05, 1997
Export Citation:
Assignee:
TOYO KOHAN CO LTD (JP)
YAMAZAKI YUJI (JP)
TAKAGI KEN ICHI (JP)
NAKANO KAZUNORI (JP)
YAMAZAKI YUJI (JP)
TAKAGI KEN ICHI (JP)
NAKANO KAZUNORI (JP)
International Classes:
C22C29/14; C22C32/00; (IPC1-7): C22C29/14; C22C32/00
Foreign References:
| JPH05214479A | 1993-08-24 | |||
| JPH05320816A | 1993-12-07 | |||
| JPH07166289A | 1995-06-27 |
Other References:
See also references of EP 0918097A4
Attorney, Agent or Firm:
Ohta, Akio (4-3, Kasumigaseki 1-chom, Chiyoda-ku Tokyo 100, JP)
Download PDF: