Title:
GREEN COMPACT AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2016/098525
Kind Code:
A1
Abstract:
A green compact according to the present invention is obtained by compression molding raw material powders having a metal powder as a primary raw material, wherein an oxide film is formed between the raw material powders that constitute the green compact, thereby binding the raw material powders to each other. The green compact is characterized in that a powder having a circularity R of 0.75 or higher at a cumulative frequency of 80% is used as the metal powder. Here, the circularity R is represented by numerical formula (1), where the two-dimensional projected area of the metal powder is denoted by S and the two-dimensional projected circumference of the metal powder is denoted by L.
Inventors:
YASHIRO NAOKI (JP)
OOHIRA KOUYA (JP)
OOHIRA KOUYA (JP)
Application Number:
PCT/JP2015/082711
Publication Date:
June 23, 2016
Filing Date:
November 20, 2015
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
B22F3/02; B22F1/06; B22F3/11; B22F3/24; B22F5/00; C22C33/02; F16C33/10; F16C33/12; F16C33/14
Foreign References:
| JPS5763602A | 1982-04-17 | |||
| JPH0633111A | 1994-02-08 | |||
| JPS61276901A | 1986-12-06 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
Kunihiko Shiromura (JP)
Kunihiko Shiromura (JP)
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