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

a technology of metal powder and powder metallurgy, which is applied in the field of metal powder for powder metallurgy, a compound, a granulated powder, and a sintered body, can solve the problems of significant increase in work load and inability to avoid the increase in cost, and achieve the effect of high density

Inactive Publication Date: 2015-09-10
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect of this invention relates to making a metal powder that can produce a strong sintered body with a higher density than traditional methods.

Problems solved by technology

The technical problem addressed in this patent is how to produce a metal powder that can achieve a higher density while being able to perform other treatments without requiring another step.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0200]Next, Examples of the invention will be described.

1. Production of Sintered Body

Sample No. 1

[0201](1) First, a metal powder having a composition shown in Table 1 produced by a water atomization method was prepared. This metal powder had an average particle diameter of 4.05 μm, a tap density of 4.20 g / cm3, and a specific surface area of 0.23 m2 / g.

[0202]The composition of the powder shown in Table 1 was identified and determined by an inductively coupled high-frequency plasma optical emission spectroscopy (ICP method). In the ICP analysis, an ICP device (model: CIROS-120) manufactured by Rigaku Corporation was used. Further, in the identification and determination of C, a carbon-sulfur analyzer (CS-200) manufactured by LECO Corporation was used. Further, in the identification and determination of 0, an oxygen-nitrogen analyzer (TC-300 / EF-300) manufactured by LECO Corporation was used.

[0203](2) Subsequently, the metal powder and a mixture (an organic binder) of polypropylene a

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Abstract

A metal powder for powder metallurgy contains Fe as a principal component, Cr in a proportion of 15% by mass or more and 26% by mass or less, Ni in a proportion of 7% by mass or more and 22% by mass or less, Si in a proportion of 0.3% by mass or more and 1.2% by mass or less, C in a proportion of 0.005% by mass or more and 0.3% by mass or less, Zr in a proportion of 0.01% by mass or more and 0.5% by mass or less, and Nb in a proportion of 0.01% by mass or more and 0.5% by mass or less. Further, the metal powder for powder metallurgy preferably has an austenite crystal structure.

Description

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Claims

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Application Information

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Owner SEIKO EPSON CORP
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