CN109530705A - A kind of preparation method of alumina dispersion-strenghtened copper-base diffusion alloy powder - Google Patents
A kind of preparation method of alumina dispersion-strenghtened copper-base diffusion alloy powder Download PDFInfo
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- CN109530705A CN109530705A CN201910002892.1A CN201910002892A CN109530705A CN 109530705 A CN109530705 A CN 109530705A CN 201910002892 A CN201910002892 A CN 201910002892A CN 109530705 A CN109530705 A CN 109530705A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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Abstract
A kind of preparation method of alumina dispersion-strenghtened copper-base diffusion alloy powder, the following steps are included: (1) weighs 75 microns of partial size < of alumina dispersion-strenghtened copper powder and 45 microns of partial size < of metal powder in mass ratio, 4~8h is mixed；(2) 0.5~4h of mixed powder is handled at hydrogen atmosphere and 600~900 DEG C；(3) resulting material is crushed to partial size≤180 micron, is sieved into 180~150 microns of partial size, 15~75 microns, 75~45 microns, the powder of 45 microns of four kinds of different-grain diameter ranges of <；(4) 1~3h of powder is handled at hydrogen atmosphere and 450~650 DEG C, is cooled to room temperature to obtain alumina dispersion-strenghtened copper-base diffusion alloy powder, is finally vacuum-packed.The present invention provides the preparation method of the controllable alumina dispersion-strenghtened copper-base diffusion alloy powder of a kind of uniform ingredient, powder diameter, apparent density, mobility.It is able to satisfy the various application requirements such as oiliness bearing, diamond tool, friction material.
Description
Technical field
The present invention relates to a kind of preparation methods of copper-based diffusion alloy powder, and in particular to a kind of alumina dispersion-strenghtened copper-base
The preparation method of diffusion alloy powder, belongs to powder metallurgical technology.
Background technique
Copper is answered as a kind of important Industrial Metal in industries such as oiliness bearing, diamond tool, friction materials extensively
With.In these typical cases, usually all there is relatively high synthesis to performances such as the strength of materials, hardness, wearability and thermal conductivity
It is required that.Dispersion-strengtherning is to increase the effective means of alloy strength.Aluminium oxide has thermal stability under fusing point height, high temperature good and elastic
The characteristics such as modulus height are common dispersion strengthening phases, especially achieve remarkable result in strengthened copper alloy.Aluminum oxide dispersion
Strengthen copper and not only remained the excellent conduction of Copper substrate, heating conduction, but also significantly improve the intensity of Copper substrate, hardness, especially
Elevated temperature strength and high temperature hardness.The characteristic of alumina dispersion-strenghtened copper alloy can meet these requirements well, to be expected to
It plays a significant role in such applications.Above-mentioned application belongs to field of powder metallurgy, mainly using copper-base alloy powder as raw material.
But alumina dispersion-strenghtened copper alloy is only obtained in spot-wedling electrode industry mainly based on stick, bulk product on existing market
Practical application, application range are very limited.Alumina dispersion-strenghtened copper powder-product is seldom seen at present, more has no aluminium oxide more
It dissipates and strengthens copper-based spread powder product, also have not seen report relevant to the technology of preparing of alumina dispersion-strenghtened copper-base spread powder.
This severely limits alumina dispersion-strenghtened copper-base powder the industries such as oiliness bearing, diamond tool, friction material application.
In the different applications such as oiliness bearing, diamond tool, friction material, the ingredient of powder, particle size, pine are filled
Density, mobility etc. require different, such as oiliness bearing is usually using copper-tin alloy powder (mass content of tin be 10%),
Generally to powder flowbility (≤40s/50g) and apparent density (2.0~3.5g/cm3) have higher requirements；Diamond tool uses
Copper alloy powder ingredient generally comprise tin, zinc, Ni etc., usually require that powder diameter is tiny (≤45 μm), apparent density it is low (≤
3.0g/cm3), oxygen content is low (≤0.3wt%)；The copper alloy powder ingredient that friction material uses generally comprises iron, tin etc., together
Sample has relatively high composite request to powder diameter (≤75 μm) and oxygen content (≤0.3wt%).
The common preparation method of Cu-base powder include mixing method (mixed powder of copper powder and other metal powders), atomization and
Diffusion method.Wherein usually there is composition cluster in powder made from mixing method, cause material property bad；Powder made of atomization
Based on spherical or subsphaeroidal, good fluidity, apparent density is high, but mouldability is poor；Compared with mixing method and atomization, expand
The powder comprehensive performance of arching pushing preparation is good, and the scope of application is more extensive.The present invention is directed to above-mentioned requirements, prepares oxygen using diffusion method
Change the dispersion strengthening copper-based alloyed powder of aluminium, obtaining by different breaking methods has different-shape (subsphaeroidal and irregular shape)
With the powder of partial size, the powder of different-shape and partial size is mixed according to practical application request according to a certain percentage then, is made
Powdered ingredients it is uniform, powder diameter, apparent density, mobility are controllable in a certain range, to meet oiliness bearing, gold
The different application requirement such as hard rock tool, friction material.
Summary of the invention
For the missing of current alumina dispersion-strenghtened copper diffusion alloy powder, preparation method thereof, it is equal that the present invention provides a kind of ingredient
The preparation method of the controllable alumina dispersion-strenghtened copper-base diffusion alloy powder of even, powder diameter, apparent density, mobility.
The method of the present invention includes the following steps:
(1) 75 microns of partial size < of alumina dispersion-strenghtened copper powder and 45 microns of partial size < of metal powder are weighed in mass ratio
End mixes 4~8h；
(2) 0.5~4h of mixed powder is handled at hydrogen atmosphere and 600~900 DEG C；
(3) be crushed resulting material to partial size≤180 micron, be sieved into 180~150 microns of partial size, 150~75 microns,
75~45 microns, the powder of 45 microns of four kinds of different-grain diameters of <, weigh the powder of different-grain diameter in mass ratio, re-mix 1~
2h；
(4) 1~3h of powder is handled at hydrogen atmosphere and 450~650 DEG C, is cooled to room temperature to obtain alumina dispersion-strenghtened
Copper-based diffusion alloy powder, is finally vacuum-packed.
The quality of alumina content of the alumina dispersion-strenghtened copper powder is 0.1~10%.
The metal powder be one of glass putty, nickel powder, zinc powder or iron powder, or the alloyed powder containing the metal or
It is a variety of.
Alumina dispersion-strenghtened copper powder and metal powder are diffused conjunction at hydrogen atmosphere and 600~900 DEG C by the present invention
Aurification processing, keeps various distributions of metallic elements uniform, is then obtained using the different grinding modes such as mechanical crushing and air-flow crushing
The different alloyed powder of pattern, partial size, then the alloy powder of different-shape and partial size is mixed according to a certain percentage, is restored,
The controllable alumina dispersion-strenghtened copper-base diffusion alloy powder of powder diameter, apparent density, mobility is finally obtained, can sufficiently be sent out
Wave that the excellent intensity of alumina dispersion-strenghtened copper, hardness, size distortion amount is small etc. in softening performance resistant to high temperatures and sintering process
Characteristic makes it meet the application requirement in the fields such as oiliness bearing, diamond tool, brake block.
Detailed description of the invention
The alumina dispersion-strenghtened copper of Fig. 1 embodiment 1-tin diffusion alloy powder metallograph；
Fig. 2 embodiment 2 is shone through the resulting alumina dispersion-strenghtened copper of air-flow crushing-nickel tin zinc diffusion alloy powder SEM
Piece；
The SEM photograph through resulting alumina dispersion-strenghtened copper-iron tin diffusion alloy powder is mechanically pulverized of Fig. 3 embodiment 3.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, but embodiment of the present invention is without being limited thereto.
Embodiment 1
The preparation of alumina dispersion-strenghtened copper-tin diffusion alloy powder.
With 75 microns of Al of partial size <2O3The aluminum oxide dispersion copper alloy powder and commercially available partial size < 45 that it is 0.1% that quality, which contains, are micro-
The glass putty of rice is raw material, in mass ratio alumina dispersion-strenghtened copper powder: glass putty=90:10 is uniformly mixed, by mixed powder in hydrogen
In atmosphere, 700 DEG C of processing 1h will sieve 150 microns of resulting partial size >, 150~75 microns, 75 by being mechanically pulverized, being sieved
~45 microns, the powder of 45 microns of four kinds of different-grain diameter ranges of < mixed by 3%, 52%, 15% and 30% mass ratio, then exist
In hydrogen atmosphere, 450 DEG C of processing 3h obtain hydrogen loss less than 0.3%, apparent density 2.65g/cm3, mobility 36s/50g
Alumina dispersion-strenghtened copper-tin diffusion alloy powder.
Embodiment 2
The preparation of alumina dispersion-strenghtened copper-nickel tin zinc diffusion alloy powder.
With 75 microns of partial size <, Al2O3The aluminum oxide dispersion copper alloy powder and commercially available partial size < 45 that it is 5% that quality, which contains, are micro-
Nickel powder, glass putty and the zinc powder of rice are raw material, in mass ratio alumina dispersion-strenghtened copper powder: nickel powder: glass putty: zinc powder=75:10:
10:5 is uniformly mixed, and by mixed powder in hydrogen, 800 DEG C of processing 3h will be sieved by mechanical crushing and air-flow crushing, sieving
The air-flow crushing powder and mechanical crushing powder of 45 microns of resulting partial size < is mixed by 15% and 85% mass ratio, then in hydrogen
In atmosphere, 550 DEG C of processing 1h obtain hydrogen loss less than 0.3%, apparent density 1.85g/cm3Alumina dispersion-strenghtened copper-nickel
Tin diffusion alloy powder.
Embodiment 3
The preparation of alumina dispersion-strenghtened copper-iron tin diffusion alloy powder.
With 75 microns of partial size <, Al2O3The aluminum oxide dispersion copper alloy powder and commercially available partial size < 45 that it is 10% that quality, which contains, are micro-
The iron powder and glass putty of rice are raw material, in mass ratio alumina dispersion-strenghtened copper powder: iron powder: glass putty=85:10:5 is uniformly mixed, will
For mixed powder in hydrogen, 900 DEG C of processing 3h will sieve the mixed powder of 75 microns of resulting partial size < by being mechanically pulverized, being sieved
In hydrogen atmosphere, 650 DEG C of processing 1h obtain hydrogen loss less than 0.3%, apparent density 2.53g/cm3Aluminum oxide dispersion it is strong
Change copper-iron tin diffusion alloy powder.
Claims (3)
1. a kind of preparation method of alumina dispersion-strenghtened copper-base diffusion alloy powder, it is characterised in that the following steps are included:
(1) 75 microns of partial size < of alumina dispersion-strenghtened copper powder and 45 microns of partial size < of metal powder are weighed in mass ratio,
Mix 4~8h；
(2) 0.5~4h of mixed powder is handled at hydrogen atmosphere and 600~900 DEG C；
(3) resulting material is crushed to partial size≤180 micron, is sieved into 180~150 microns of partial size, 15~75 microns, 75~45
The powder of 45 microns of micron, < four kinds of different-grain diameters, weighs the powder of different-grain diameter in mass ratio, re-mixes 1~2h；
(4) 1~3h of powder is handled at hydrogen atmosphere and 450~650 DEG C, is cooled to room temperature to obtain alumina dispersion-strenghtened copper-base
Diffusion alloy powder, is finally vacuum-packed.
2. the preparation method of alumina dispersion-strenghtened copper-base diffusion alloy powder according to claim 1, it is characterised in that: described
Alumina dispersion-strenghtened copper powder quality of alumina content be 0.1~10%.
3. the preparation method of alumina dispersion-strenghtened copper-base diffusion alloy powder according to claim 1, it is characterised in that: described
Metal powder is one or more of glass putty, nickel powder, zinc powder or iron powder, or the alloyed powder containing the metal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110340345A (en) * | 2019-07-09 | 2019-10-18 | 广东省材料与加工研究所 | A kind of nanometer mutually enhances Cu-based diamond tools carcass powder and carcass preparation method |
| CN113814394A (en) * | 2021-09-28 | 2021-12-21 | 共享智能装备有限公司 | Metal powder material for droplet jet printing and preparation method |
| CN114192788A (en) * | 2021-11-29 | 2022-03-18 | 广东省科学院新材料研究所 | Aluminum oxide dispersion strengthening copper-tin alloy powder and preparation method thereof |
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| JPH11286702A (en) * | 1998-04-01 | 1999-10-19 | Mitsui Mining & Smelting Co Ltd | Manufacture of alumina dispersion-strengthened copper powder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110340345A (en) * | 2019-07-09 | 2019-10-18 | 广东省材料与加工研究所 | A kind of nanometer mutually enhances Cu-based diamond tools carcass powder and carcass preparation method |
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| CN113814394A (en) * | 2021-09-28 | 2021-12-21 | 共享智能装备有限公司 | Metal powder material for droplet jet printing and preparation method |
| CN113814394B (en) * | 2021-09-28 | 2023-09-01 | 共享智能装备有限公司 | Metal powder material for droplet jet printing and preparation method |
| CN114192788A (en) * | 2021-11-29 | 2022-03-18 | 广东省科学院新材料研究所 | Aluminum oxide dispersion strengthening copper-tin alloy powder and preparation method thereof |
| CN114192788B (en) * | 2021-11-29 | 2023-11-03 | 广东省科学院新材料研究所 | Alumina dispersion strengthening copper-tin alloy powder and preparation method thereof |
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Application publication date: 20190329 |