Cu-Sn mixture powder and process for producing the same

A technology of mixed powder and manufacturing method, which is applied in the field of bronze-based sintered powder, can solve the problems of high manufacturing cost, achieve the effect of improving sintering characteristics and reducing cost

Active Publication Date: 2010-06-09
JX NIPPON MINING & METALS CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since such a bronze powder for sintering is required to be almost entirely bronze powder, the manufacturing cost becomes high, and it is not necessarily satisfied at present.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cu-Sn mixture powder and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix the electrolytic copper powder (-100 mesh) with the atomized tin powder in a weight ratio of 89:11. 2 +N 2 In a mixed gas atmosphere, sintering (Cu-11% Sn product) is performed at 630°C. The maximum temperature residence time is 30 minutes.

[0039] As a result, a partially alloyed (70% alloyed) sintered body was obtained. After coarsely pulverizing the agglomerate, it was pulverized with a hammer mill type pulverizer (pulverizer) and sieved with a 100 mesh to obtain a Cu-11% Sn pulverized powder of -100 mesh.

[0040] Then, to the -100 mesh Cu-11% Sn pulverized powder, the -100 mesh electrolytic copper powder was added at a ratio (weight ratio) of 81.8:18.2 and placed in a mixer to obtain a Cu-9% Sn mixed powder. In addition, 0.5% (not included in the total) lubricant Metafluo A was added to the mixed powder and mixed.

[0041] The characteristics of the mixed powder for sintering thus obtained were examined. The apparent density (g / cm 3 ) And fluidity (s / 50g), the com...

Embodiment 2

[0050] To the Cu-11%Sn pulverized powder with -100 mesh obtained in the above example 1, the electrolytic copper powder with -250 mesh was added at a ratio (weight ratio) of 81.8:18.2 and placed in a mixer to obtain Cu-9%Sn Mix the powder. In addition, 0.5% (not included in the total) lubricant Metafluo A was added to the mixed powder and mixed.

[0051] The characteristics of the mixed powder for sintering thus obtained were examined. The apparent density (g / cm 3 ) And fluidity (s / 50g), the compact density (g / cm 3 ) And Latola value (%), the radial compressive strength (kgf / mm 2 ). The results are shown in Table 1 to Table 3.

Embodiment 3

[0053] Mix the electrolytic copper powder (-100 mesh) with the atomized tin powder in a weight ratio of 89:11. 2 +N 2 In a mixed gas atmosphere, sintering (Cu-11% Sn product) is performed at 550°C. The maximum temperature residence time is 30 minutes.

[0054] As a result, a partially alloyed (60% alloyed) sintered body was obtained. After coarsely pulverizing the agglomerate, it was pulverized with a hammer mill type pulverizer (pulverizer) and sieved with a 100 mesh to obtain a Cu-11% Sn pulverized powder of -100 mesh.

[0055] Then, to the -100 mesh Cu-11% Sn pulverized powder, the -100 mesh electrolytic copper powder was added at a ratio (weight ratio) of 81.8:18.2 and placed in a mixer to obtain a Cu-9% Sn mixed powder. In addition, 0.5% (not included in the total) lubricant Metafluo A was added to the mixed powder and mixed.

[0056] The characteristics of the mixed powder for sintering thus obtained were examined. The apparent density (g / cm 3 ) And fluidity (s / 50g), the com...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a Cu-Sn mixture powder for use as a feed powder for powder metallurgy, characterized by comprising a powder mixture of a powder obtained by pulverizing a partly alloyed Cu-Snsinter and an electrolytic copper powder; and a process for producing a Cu-Sn mixture powder for use as a feed powder for powder metallurgy, characterized by sintering a copper powder and a tin powderto produce a partially alloyed Cu-Sn sinter, pulverizing the sinter to obtain a Cu-Sn pulverization powder, and then blending this Cu-Sn pulverization powder with an electrolytic copper powder. The Cu-Sn powder, when used in producing a feed powder for powder metallurgy for, e.g., sintered oil-impregnated bearings, gives a powder which has enhanced moldability with respect to compact density, Rattler value, etc., attains improved sinter properties including radial crushing strength, and can attain a cost reduction.

Description

Technical field [0001] The present invention relates to a bronze-based sintered powder used as a raw material powder for powder metallurgy such as an oil-containing sintered bearing, that is, a Cu-Sn-based mixed powder, and a manufacturing method thereof. Background technique [0002] In the past, as raw material powders for powder metallurgy of oil-impregnated sintered bearings, copper powders such as electrolytic copper powder and tin powder were used, and a method of mixing these powders to a target ratio and forming and sintering was used. However, due to the combination of copper powder and tin powder The specific gravity, particle size, and particle size are different, so it is difficult to uniformly mix. In addition, at this time, the alloying of copper and tin is carried out in the liquid phase during the sintering process, which is called liquid phase sintering. However, since the shrinkage rate during sintering becomes large, there is a problem that the dimensional accu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/04C22C9/02
CPCB22F9/04B22F2998/10C22C9/02B22F2999/00B22F1/09B22F3/10C25C5/02
Inventor 成泽靖
Owner JX NIPPON MINING & METALS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap