Title:
MANUFACTURE OF LUBRICANT FOR WARM DIE LUBRICATION, IRON- BASE POWDER MIXTURE FOR WARM DIE LUBRICATING COMPACTION, HIGH DENSITY GREEN COMPACT OF IRON-BASE POWDER, AND HIGH DENSITY IRON-BASE SINTERED COMPACT
Document Type and Number:
Japanese Patent JP3931503
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a high density green compact of iron-base powder, capable of giving a high density green compact by a single compaction, and a method of manufacturing a sintered compact using the green compact.
SOLUTION: A lubricant, which consists of 0.5-80 wt.% lubricant having a melting point higher than the compaction temperature and the balance lubricant having a melting point lower than the compaction temperature, is allowed to adhere to the surface of a die by electrification. After the die is filled with a heated iron-base powder mixture, the powder mixture is compacted at prescribed temperature into a green compact or the green compact is further sintered. The iron-base powder mixture contains an iron-base powder and a compaction lubricant in which a lubricant having a low melting point not higher than the prescribed compaction temperature comprises 10-75 mass % of the total amount of lubricant and the balance is composed of a lubricant having a melting point higher than a prescribed compaction temperature.
Inventors:
Shigeru Unami
Yukiko Ozaki
Satoshi Uenozono
Yukiko Ozaki
Satoshi Uenozono
Application Number:
JP30859099A
Publication Date:
June 20, 2007
Filing Date:
October 29, 1999
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B22F3/035; B22F1/00; B22F3/00; B22F3/02; (IPC1-7): B22F3/035; B22F1/00; B22F3/00; B22F3/02
Domestic Patent References:
| JP10317001A |
Attorney, Agent or Firm:
Eiichi Kobayashi