Title:
PROCESS FOR PRODUCING SINTERED BRONZE ALLOY POWDER
Document Type and Number:
WIPO Patent Application WO/2010/087261
Kind Code:
A1
Abstract:
A process for producing a sintered bronze alloy powder, characterized by comprising: a provisional sintering step in which a copper/tin mixed powder prepared by mixing a 200-mesh powder of electrolytic copper with a 350-mesh tin powder so as to result in a tin powder proportion of 8-11 wt.% is sintered at 300-600ºC in a reducing atmosphere and then pulverized; a final sintering step in which the provisionally sintered powder is sintered again at 500-700ºC in a reducing atmosphere; and thereafter pulverizing and sieving the sintered powder. Provided is a bronze alloy powder which has a microfine particle size and is suitable for producing oil-impregnated sintered bearings having a reduced size. Although a microfine raw-material powder, the bronze alloy powder has flowability that causes no decrease in productivity.
Inventors:
NARUSAWA YASUSHI (JP)
Application Number:
PCT/JP2010/050676
Publication Date:
August 05, 2010
Filing Date:
January 21, 2010
Export Citation:
Assignee:
NIPPON MINING CO (JP)
NARUSAWA YASUSHI (JP)
NARUSAWA YASUSHI (JP)
International Classes:
B22F9/04; B22F1/142
Domestic Patent References:
| WO2006126353A1 | 2006-11-30 |
Attorney, Agent or Firm:
OGOSHI ISAMU (JP)
Isamu Ogoshi (JP)
Isamu Ogoshi (JP)
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