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

A technology of powder metallurgy and manufacturing method, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of shortened service life, easy wear and tear of cutting tools, low melting point, etc., to achieve the effect of improving function, inhibiting wear, and obvious function

Active Publication Date: 2017-11-24
JFE STEEL CORP
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  • Summary
  • 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 for producing same, and method for producing sintered body made of iron-based powder
  • Mixed powder for powder metallurgy, method for producing same, and method for producing sintered body made of iron-based powder
  • Mixed powder for powder metallurgy, method for producing same, and method for producing sintered body made of iron-based powder

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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, the crystalline layered alkali silicate heat-treated in the range of 400 to 1100°C is used as the machinability-improving powder, and the amount of the machinability-improving powder is adjusted relative to the iron-based powder, alloy for The total amount of the powder and the powder for improving machinability is in the range of 0.01 to 1.0% by mass, whereby a mixed powder for powder metallurgy can be obtained without adversely affecting the furnace environment of the sintering furnace The sintering of the molded body can also be carried out, and a sintered body having both excellent lathe machinability and excellent drill machinability can be obtained.

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] Products utilizing powder metallurgy technology are being used in various fields since the advancement of powder metallurgy technology enables the manufacture of components with high dimensional accuracy and complex shapes into near net shapes. The powder metallurgy technology is characterized by a high degree of sh...

Claims

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Application Information

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Patent Type & Authority Patents(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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