Copper based metal powder

A technology of metal powder and copper powder, applied in the field of copper, copper alloy and copper-based mixed powder, to achieve the effect of improving productivity and improving fluidity

Active Publication Date: 2009-09-02
FUKUKA METAL FOIL & POWDER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] In order to solve this conventional problem, the present invention provides a copper-based powder having excellent fluidity, which is added in an amount of 1.0% by mass or less relative to the copper-based powder to copper powder or copper alloy powder, Mixed hydrophobized SiO with an average particle size of 40nm or less 2 or Al 2 o 3 or TiO 2 or MgO or their mixture as fluidity improving material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 12

[0054] Example 12 shows the addition of SiO to water atomized bronze powder with an average particle size of 35.6 μm 2 The effect of improving fluidity is shown in Example 13 by adding SiO to water atomized bronze powder with an average particle size of 10.3 μm 2 Although the fluidity improvement effect brought about was substantially equivalent to that of water atomized copper powder having an average particle diameter of the same level, the improvement effect was confirmed.

[0055] Table 5 shows the effect of improving fluidity of powders in which auxiliary component powders and lubricants are mixed with copper powders as additional powders. Also, SiO in the following Table 5 2 The added amount is out% with respect to the total mass of copper powder, subcomponent powder, and lubricant.

[0056] 【table 5】

[0057]

Embodiment 14

[0058] Example 14 shows that SiO is added to a mixed powder of electrolytic copper powder and 10% water atomized tin powder, in which 0.5out% of zinc stearate is added as a forming lubricant. 2 The result of 0.05% in Comparative Example 18 is to show that no addition of SiO 2 results when adding SiO 2 When the content is 0.05%, the fluidity improvement effect is seen.

Embodiment 15

[0059] As shown in Example 15, SiO was added to a mixed powder of electrolytic copper powder and 2% graphite powder, in which 0.5 out% of EBS resin was added as a wax-based lubricant as a molding lubricant. 2 The results of Comparative Example 19 showed no addition of SiO 2 results when adding SiO 2 When it reaches 0.05%, the fluidity improvement effect is seen.

[0060] As shown in Table 6, Al is used as a fluidity improving material 2 o 3 , or use TiO 2 , MgO, and SiO mixed in a ratio of 1:1:1:1 using 2 、Al 2 o 3 、TiO 2 , The fluidity improvement effect of the mixture of MgO. Also, SiO with hydrophobic treatment 2 、Al 2 o 3 、TiO 2 and MgO are used on the market.

[0061] 【Table 6】

[0062]

[0063] *: Mix SiO at a ratio of 1:1:1:1 2 , Al 2 o 3 ,TiO 2 , MgO

[0064] As shown in Examples 16 to 19, the fluidity improvement effect was obtained in all.

[0065] As described above, if the fluidity improving material used in the present invention is not subje...

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Abstract

The invention provides copper based metal powders with excellent fluidity suitable as raw material for powder metallurgy, specifically copper based metal powders added and mixed with hydrophobic SiO2 or Al2O3 or TiO2 or MgO or their mixture as fluidity improvement materials with an average grain diameter of 40nm or below and an addition ratio of 1.0 wt.% or below. Organic silicon compound and so on are suitably used for the hydrophobic treatment.

Description

technical field [0001] The present invention relates to copper, copper alloys and copper-based mixed powders excellent in fluidity, which are used as raw material powders for powder metallurgy. Background technique [0002] Conventionally, among the copper-based powders used in powder metallurgy, some have poor fluidity due to their shape, particle size, and the like. For example, electrolytic copper powder has a very complicated dendritic shape, so the powders are entangled with each other, resulting in poor fluidity. In addition, even if the powder is in a nearly spherical shape produced by the atomization method, if the particle diameter is 50 μm or less, the adhesion between the particles becomes strong and the fluidity deteriorates. [0003] In the powder metallurgy method, powder is filled into a forming metal mold and extrusion-molded, but especially in recent years, in order to manufacture thin-walled and complex-shaped parts, the clearance of the metal mold is smal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
Inventor 小山忠司益冈佐千子寺居臣治
Owner FUKUKA METAL FOIL & POWDER CO LTD
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