Metal powder for powder metallurgy, compound, granulated powder, sintered body, and method for producing sintered body

A technology of powder metallurgy and metal powder, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of inevitable high cost and increased working hours

Active Publication Date: 2015-09-30
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, although the density can be increased by performing additional treatment such as hot isostatic pressing (HIP treatment) on the sintered body, it is inevitable to increase the cost while greatly increasing the number of man-hours.

Method used

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  • Metal powder for powder metallurgy, compound, granulated powder, sintered body, and method for producing sintered body
  • Metal powder for powder metallurgy, compound, granulated powder, sintered body, and method for producing sintered body
  • Metal powder for powder metallurgy, compound, granulated powder, sintered body, and method for producing sintered body

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Embodiment Construction

[0052] Hereinafter, the metal powder for powder metallurgy, the composite, the granulated powder, the sintered body, and the method for producing the sintered body of the present invention will be described in detail based on preferred embodiments shown in the drawings.

[0053] [Metal powder for powder metallurgy]

[0054] First, an embodiment of the metal powder for powder metallurgy of the present invention will be described.

[0055] In powder metallurgy, a sintered body of a desired shape can be obtained by molding a composition including a metal powder for powder metallurgy and a binder into a desired shape, followed by degreasing and firing. According to this powder metallurgy technique, compared with other metallurgy techniques, there is an advantage that a sintered compact having a complex and fine shape can be produced in a near-net shape (a shape close to the final shape).

[0056] Conventionally, as a metal powder for powder metallurgy used in powder metallurgy, a...

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Abstract

A metal powder for powder metallurgy includes particles each having a first region containing Fe as a principal component, a second region, in which the content of a first element is higher than in the first region, the content of Si is higher than in the first region, and the content of Fe is lower than in the first region, and a third region, in which the content of a second element is higher than in the first region, the content of Si is higher than in the first region, and the content of Fe is lower than in the first region. Further, the first region occupies 50% by volume or more of each of the particles and also is crystalline.

Description

technical field [0001] The present invention relates to a metal powder for powder metallurgy, a compound, a granulated powder, a sintered body, and a method for producing the sintered body. Background technique [0002] In powder metallurgy, a sintered body is produced by molding a composition containing a metal powder and a binder into a desired shape to obtain a molded body, and then degreasing and sintering the molded body. In the production process of such a sintered body, atomic diffusion occurs between particles of the metal powder, whereby the molded body is gradually densified and sintered. [0003] For example, Patent Document 1 proposes a metal powder for powder metallurgy that contains Zr and Si, and the balance is composed of at least one selected from the group consisting of Fe, Co, and Ni and unavoidable elements. According to such a metal powder for powder metallurgy, sinterability is improved by the action of Zr, and a high-density sintered body can be easil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/10B22F1/10B22F1/148
CPCB22F3/12B22F1/0059C22C38/02C22C38/48C22C38/46C22C38/04C22C33/0285C22C38/50C22C38/44B22F1/0003B22F2998/10C22C38/002C22C38/004C22C38/005B22F1/148B22F1/10B22F1/00B22F3/02B22F3/10
Inventor 中村英文
Owner SEIKO EPSON CORP
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