Title:
硬質粒子分散型鉄基焼結合金
Document Type and Number:
Japanese Patent JP4368245
Kind Code:
B2
Abstract:
An iron-based sintered alloy having improved thermal and mechanical strength is provided. The iron-based sintered alloy with dispersed hard particles comprises: a matrix comprising, by weight, 0.4 to 2% silicon (Si), 2 to 12% nickel (Ni), 3 to 12% molybdenum (Mo), 0.5 to 5% chromium (Cr), 0.6 to 4% vanadium (V), 0.1 to 3% niobium (Nb), 0.5 to 2% carbon (C), and the reminder of iron (Fe); and hard particles comprising 60 to 70% molybdenum (Mo), 0.3 to 1% boron (B), 0.1% or less carbon (C), and the reminder of iron (Fe). The hard particles are dispersed in the matrix in an amount in the range of 3 to 20% based on the entire alloy. They are sintered to produce the iron-based sintered alloy. Addition of boron into the ferromolybdenum hard particles enhances the wettability of the ferromolybdenum hard particles to prevent the hard particles from falling off the matrix. Thus, the adhesive property between the matrix and the hard particles is improved, thereby enhancing the thermal and mechanical strength of the iron-based sintered alloy.
Inventors:
Koji Hemi
Akiyoshi Ishibashi
Akiyoshi Ishibashi
Application Number:
JP2004146854A
Publication Date:
November 18, 2009
Filing Date:
May 17, 2004
Export Citation:
Assignee:
Riken Co., Ltd.
International Classes:
C22C38/00; B22F3/12; C22C29/00; C22C32/00; C22C33/02; C22C38/44; C22C38/46; C22C38/48; C22C38/56
Domestic Patent References:
| JP2002220645A | ||||
| JP5093241A | ||||
| JP1201439A |
Attorney, Agent or Firm:
Keiichi Shimizu