Copper iron tin powder composition and preparation method thereof

A composition and powder technology, which is applied in the field of copper-iron-tin powder composition and its preparation, can solve problems such as complex procedures, insufficient strength and wear resistance of finished products, and influence

Inactive Publication Date: 2013-04-03
湖南汇融科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The Chinese invention patent with the publication number CN101088669A discloses a bronze-clad iron composite powder and its manufacturing method, which is to uniformly mix copper-tin alloy or tin powder in the copper-clad iron composite powder, and perform reduction adhesion or reduction diffusion in the reduction furnace , the temperature in the furnace is 400°C~800°C, and the time is not less than 30 minutes, so that the copper-clad iron composite powder surface forms a copper-tin alloy coating layer. However, this method has the following disadvantages: since the raw material for preparing bronze-clad iron is copper-clad iron , while the preparation of copper-clad iron requires a more complicated procedure, the performance of copper-clad iron has a great influence on the subsequent production of bronze-clad iron, which is prone to unstable performance
[0004] The Chinese invention patent with the publication number 101780541A discloses a bronze-coated iron composite powder and its manufacturing method, which is made of the following raw materials with the following mass composition: a soluble copper ion compound with a copper content of 10%~30%: 10~ 30 parts by weight, soluble fine particle compound with a tin content of 2% to 10%: 2 to 10 parts by weight, iron powder with a particle size of 100 to 500 mesh: 60 to 80 parts by weight, and the composite powder made by the manufacturing method, the The follow-up operation process of the method also includes reduction and crushing. However, the disadvantage of this method is that the powder produced by this method has insufficient strength and wear resistance, and is not suitable for the production of some high-speed miniature oil-impregnated bearings.

Method used

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preparation example Construction

[0024] The present invention also discloses a preparation method of the above-mentioned copper-iron-tin powder composition, comprising the following steps:

[0025] a) Mixing copper powder and iron powder, and diffusing the mixed powder;

[0026] b) crushing and screening the powder obtained in step a);

[0027] c) mixing the powder obtained in step b) with spindle oil;

[0028] d) mixing the powder obtained in step c) with tin powder and graphite powder to obtain a copper-iron-tin powder composition.

[0029] According to the present invention, copper powder and iron powder are firstly mixed, and the mixed powder is subjected to diffusion treatment. In order to reduce the entry of impurity elements into the mixed powder, the copper powder is preferably electrolytic copper powder, and the iron powder is preferably reduced iron powder. The electrolytic copper powder is preferably prepared according to the following method: thick copper containing 99% copper is pre-made into ...

Embodiment 1

[0037] a) By weight percentage, mix 50% electrolytic copper powder and 45.5% reduced iron powder evenly, and mix for 80 minutes.

[0038] b) Spread the powder obtained in a) in a reduction furnace, the diffusion temperature is 720°C, and the ammonia decomposition atmosphere is 10m 3 / h, pure nitrogen atmosphere 15m 3 / h, diffusion time 30min.

[0039] c) Pass the powder obtained in b) through a 120mesh sieve, and take out the -120mesh powder.

[0040] d) Add 0.8cc / kg of spindle oil to the powder obtained in c), and mix for 10 minutes. Then add 4wt% tin powder, 0.5wt% graphite powder, and 0.4wt% zinc stearate of the total powder mass, and mix and stir for 40 minutes.

[0041] e) Sieve the powder obtained in d), and select 60 mesh for the sieve.

[0042] f) Put the sieved powder in a mixer and stir for 15 minutes, then use it after standing for 15 hours.

[0043] The prepared composite powder was tested, and the results showed that the composition of the composite powder wa...

Embodiment 2

[0045] a) By weight percentage, mix 30% electrolytic copper powder and 66% reduced iron powder evenly, and mix for 40 minutes.

[0046] b) Spread the powder in a) in a reduction furnace, the diffusion temperature is 780°C, and the ammonia decomposition atmosphere is 14m 3 / h, pure nitrogen atmosphere 18m 3 / h, diffusion time 40min.

[0047] c) Pass the powder from b) through a 120mesh sieve, and take out the -120mesh powder.

[0048] d) Add 0.5cc / kg of spindle oil to the powder in c), and mix for 10 minutes. Then add 3.5wt% tin powder, 0.5wt% graphite powder, and 0.5wt% zinc stearate of the total powder mass, and mix and stir for 30 minutes.

[0049] e) Sieve the powder obtained in d), and select 60 mesh for the sieve.

[0050] f) Put the sieved powder in a mixer and stir for 15 minutes, then use it after standing for 18 hours.

[0051] The produced powder was pressed and sintered, and 20 groups of samples were taken, and the change rate of the outer diameter was measured...

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Abstract

The invention provides a copper iron tin powder composition and a preparation method thereof. The preparation method of the copper iron tine powder composition includes: firstly, mixing copper powder and iron powder, and dispersing mixture to obtain copper and iron pre-alloy powder; and secondly, adding spindle oil after smashing and screening the pre-alloy powder, and then adding tin powder and graphite powder to obtain the copper iron tin powder composition. As content of copper and tin is increased and the spindle oil is added, wear resistance of the powder composition is improved. Meanwhile, iron powder in the copper iron tin powder composition is exposed by smashing during preparation, and accordingly, strength of the powder composition is improved. Therefore, the copper iron tin powder composition is high in strength and wear resistance.

Description

technical field [0001] The invention relates to the technical field of composite powders, in particular to a copper-iron-tin powder composition and a preparation method thereof. Background technique [0002] At present, in the powder metallurgy industry, it is difficult for a single metal powder to meet the requirements of the product, and each particle of the composite powder is a powder composed of two or more different materials, and the composite powder combines each The nature of the material, so the composite powder is welcomed by the majority of manufacturers. The amount of copper-based composite powder in the composite powder is second only to iron powder, and more copper-based composite powders have been developed. In the production of oil-impregnated bearings, copper-tin powder, especially copper-iron-tin powder, has great advantages. [0003] The Chinese invention patent with the publication number CN101088669A discloses a bronze-clad iron composite powder and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
Inventor 谭兴龙戴煜荣毅陈伟然戴乾忠
Owner 湖南汇融科技有限公司
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