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Mixed powder for powder metallurgy, method of manufacturing same, and method of manufacturing iron-based powder sintered body

A technology of powder metallurgy and manufacturing method, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of low melting point, poor thermal conductivity, easy loss of cutting tools, etc., and achieve the effect of obvious function, reduced resistance and inhibition of wear and tear.

Active Publication Date: 2016-03-02
JFE STEEL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, since Pb has a melting point as low as 330°C, it melts during sintering, but is not solid-soluble in iron, so there is a problem that it is difficult to uniformly disperse it in the matrix
In addition, since Se and Te embrittle the sintered body, there is a problem that the deterioration of the mechanical properties of the sintered body is remarkable.
[0006] In addition, since the above-mentioned voids have poor thermal conductivity, when machining a sintered body, frictional heat during machining is accumulated, and the surface temperature of the tool tends to rise.
For this reason, the cutting tool is easily worn out, and the service life is shortened. As a result, the cost of the cutting process increases and the production cost of the sintered part increases.

Method used

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  • Mixed powder for powder metallurgy, method of manufacturing same, and method of manufacturing iron-based powder sintered body
  • Mixed powder for powder metallurgy, method of manufacturing same, and method of manufacturing iron-based powder sintered body
  • Mixed powder for powder metallurgy, method of manufacturing same, and method of manufacturing iron-based powder sintered body

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Embodiment

[0111] Hereinafter, the present invention will be described in more detail through examples, but the present invention is not limited to the following examples.

[0112] As the iron-based powder, the iron-based powders shown in Table 1 (average particle diameters: about 80 μm each) were used. In addition, the average particle diameter described below was calculated|required by the laser diffraction method.

[0113] Here, the iron-based powder used is as shown in Table 1, which is obtained by atomizing pure iron powder (A), reducing pure iron powder (B), and partially diffusing Cu as an alloying element to the surface of the iron powder and alloying it. Partial diffusion alloyed steel powder (C), partial diffusion alloyed steel powder (D) obtained by partially diffusing Ni, Cu, and Mo as alloying elements to the surface of iron powder and alloying, and pre-alloying Ni, Mo as alloying elements Prealloyed steel powder obtained by alloying (completely alloyed steel powder) (E), p...

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Abstract

According to the present invention, a machining-improving powder is a crystalline layered alkali silicate heat-treated at a temperature range of 400-1100 DEG C, and the mixture constituting the machining-improving powder is set such that an iron-based powder takes up 0.01-1.0 mass% in relation to the total amount of alloy powder and machining-improving powder. As a result, not only can sintering of a compact be performed in a sintering furnace without having any negative effects on the environment inside the furnace, but it is also possible to attain a mixed powder for powder metallurgy by which it is possible to obtain a sintered body having both exceptional lathing properties and exceptional drilling properties.

Description

technical field [0001] The present invention relates to a mixed powder for powder metallurgy and its production method. The mixed powder for powder metallurgy is suitable for sintered parts of automobiles, etc., and is obtained by mixing iron-based powder, powder for alloy, powder for improving machinability, and lubricant. and, the present invention also relates to a method for manufacturing a sintered body made of iron-based powder, the sintered body made of iron-based powder is obtained by molding and sintering the mixed powder, especially, the present invention seeks to improve Machinability of sintered body made of base powder. Background technique [0002] Since the advancement of powder metallurgy technology enables the manufacture of components with high dimensional accuracy and complex shape into a near net shape, products using powder metallurgy technology are used in various fields. The powder metallurgy technology is characterized by a high degree of shape freed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F1/08B22F1/10B22F1/105B22F1/12
CPCC22C33/02B22F1/10B22F1/12B22F1/105B22F1/08B22F3/16B22F9/04B22F3/004B22F9/00B22F1/09
Inventor 主代晃一前谷敏夫尾野友重尾崎由纪子
Owner JFE STEEL CORP
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