CN105057682B - A kind of preparation method of tungsten copper tin alloy powder - Google Patents
A kind of preparation method of tungsten copper tin alloy powder Download PDFInfo
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Abstract
The invention discloses a kind of preparation methods of tungsten copper tin alloy powder; the present invention selects atomized copper powder and Production of Crystalline W Powder is raw material; glass putty is added in atomized copper powder and Production of Crystalline W Powder; it is placed in steel belt reduction furnace; High temperature diffusion processing is carried out under protection gas or reducing atmosphere; make atomized copper powder realize that alloy connects with Production of Crystalline W Powder with the diffusion in Production of Crystalline W Powder in atomized copper powder by glass putty, tungsten copper tin alloy powder is obtained using the crushing and screening of crusher.The tungsten copper tin alloy meal component of the preparation method preparation of the present invention is uniform, consistency is high, mobile performance is excellent, is easy to be molded, and solves the problems, such as easily to be segregated in traditional preparation methods, and preparation process is simple, easily operated.
Description
Technical field
The present invention relates to field of metal alloy technology more particularly to a kind of preparation methods of tungsten copper tin alloy powder.
Background technology
Tungsten-copper alloy powder is led due to having both high-melting-point, high intensity, low linear expansion coefficient and the high heat conduction of copper, the height of tungsten
Electricity, high moulding excellent performance, are widely used as punching bullet shaped charge material, tungsten copper electric contact material.Added
During work produces, because diversity ratio existing for metallic copper gold and tungsten is larger, therefore we can not be by the way of founding
It is processed production, but the technology of powder metallurgy is used to be produced, one of traditional tungsten-copper alloy powder, preparation method thereof is molten
Method is oozed, is the effect using capillary force, the porous basic of certain density and intensity is filled into the wetting of lower melting-point molten metal
Skeleton, molten metal flow filling stephanoporate framework hole along particulate interspaces and generally comprise powder-processed to obtain finer and close material
The production procedure of dispensing mixing-compression moulding-sintering and infiltration-cold working.
Tungsten either copper after compression moulding, will be sintered in 1300~1500 DEG C of liquid phases, but make
During standby, liquid phase copper is penetrated by the capillarity of W skeleton hole, and densification rate is slow, and densification degree is low, copper solidification
Mutually coarse and distribution is less uniform, and high temperature sintering can make tungsten particle agglomeration, form coarse heterogeneous structure, liquid phase copper
Spilling makes ingredient be segregated, and size distortion is serious under high temperature.If the uniformity of material is bad, will allow between them
Consistency be less than 97%, and be also easy to produce segregation phenomena, influence whether the last production and processing quality of tungsten-copper alloy in this way.
Invention content
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of preparation methods of tungsten copper tin alloy powder, should
The tungsten copper tin alloy meal component of method preparation is uniform, consistency is high, mobile performance is excellent, is easy to be molded, and solves traditional preparation
The problem of being easily segregated in method.
For this purpose, the present invention uses following technical scheme：
A kind of preparation method of tungsten copper tin alloy powder, includes the following steps：
1) 40~80% Production of Crystalline W Powder, 10~60% atomized copper powder and 2~4% by weight percentage, are weighed
Glass putty；
2) Production of Crystalline W Powder, atomized copper powder, glass putty are added in two-dimentional batch mixer and are mixed to get tungsten copper tin composite powder；
3) taking-up of tungsten copper tin composite powder is placed in steel belt reduction furnace under protection gas or reducing atmosphere and carries out height
Temperature diffusion；
4) after taking out the tungsten copper tin composite powder after High temperature diffusion, crushing and screening is carried out by crusher, obtains tungsten copper
Tin alloy powder.
Atomized copper powder is further processed by cathode copper, dendritic, irregular dress, spherical, spherical powder in shallow rare mangrove
End, it is oxidizable in humid air, it can be dissolved in hot sulfuric acid or nitric acid, the antioxygenic property of atomized copper powder is excellent.Atomized copper powder is
Granular, particulate interspaces are small, and opposite sliding hinders small between particle, therefore apparent density is big.
Production of Crystalline W Powder belongs to a kind of specification most thick in tungsten powder.It is mainly used in surface spraying, petroleum perforation, stiff dough material
Material, high-temperaure coating, combustion chamber spraying high temperature coating and other wear-resisting, high temperature resistant component coatings, intermediate frequency furnace tungsten clamp pot spraying.Knot
Brilliant tungsten powder is in bright grey powder, has the characteristics that purity height, coarse size, good fluidity and oxygen-containing minimum.
It is raw material that the present invention, which selects atomized copper powder and Production of Crystalline W Powder, and advantage is：
Atomized copper powder is further processed by cathode copper, dendritic, irregular, the spherical, spherical powder in shallow rare mangrove
End, it is oxidizable in humid air, it can be dissolved in hot sulfuric acid or nitric acid, the antioxygenic property of atomized copper powder is excellent.Atomized copper powder is
Granular, particulate interspaces are small, and opposite sliding hinders small between particle, therefore apparent density is big.
Production of Crystalline W Powder belongs to a kind of specification most thick in tungsten powder.It is mainly used in surface spraying, petroleum perforation, stiff dough material
Material, high-temperaure coating, combustion chamber spraying high temperature coating and other wear-resisting, high temperature resistant component coatings, intermediate frequency furnace tungsten clamp pot spraying.Knot
Brilliant tungsten powder is in bright grey powder, has the characteristics that purity height, coarse size, good fluidity and oxygen-containing minimum.
Glass putty is added in atomized copper powder and Production of Crystalline W Powder, is placed in steel belt reduction furnace, in protection gas or reducing atmosphere
Lower progress High temperature diffusion processing, makes atomized copper powder and Production of Crystalline W Powder by diffusion of the glass putty in atomized copper powder and Production of Crystalline W Powder
Realize alloy connection, and the consistency of manufactured tungsten copper tin alloy is very high.
Wherein, the mesh number of the Production of Crystalline W Powder is -325 mesh, such as 325~600 mesh, and the mesh number of the glass putty is -500
The mesh number of mesh, such as 500~700 mesh, the atomized copper powder is -320 mesh, such as 320~500 mesh.
Wherein, the purity of the Production of Crystalline W Powder, the glass putty and the atomized copper powder is more than 99.5%.
Wherein, the two-dimentional batch mixer in the step 2) is Double cone mixer.
Wherein, the incorporation time in the step 2) is 20~40min.
Wherein, steel belt reduction furnace is HYL-375-7Q steel belt type reducing furnaces in the step 3).
Wherein, the temperature of the High temperature diffusion in the step 3) is 750~950 DEG C.
Wherein, the time of the High temperature diffusion in the step 3) is 3~5h.
Compared with prior art, beneficial effects of the present invention are：The present invention selects atomized copper powder and Production of Crystalline W Powder is raw material,
Glass putty is added in atomized copper powder and Production of Crystalline W Powder, is placed in steel belt reduction furnace, is carried out under protection gas or reducing atmosphere high
Warm DIFFUSION TREATMENT makes atomized copper powder and Production of Crystalline W Powder realize alloy by diffusion of the glass putty in atomized copper powder and Production of Crystalline W Powder
Connection, tungsten copper tin alloy powder is obtained using the crushing and screening of crusher.Tungsten copper tin alloy prepared by the preparation method of the present invention
Meal component is uniform, consistency is high, mobile performance is excellent, is easy to be molded, and solves the problems, such as easily to be segregated in traditional preparation methods, and
And preparation process is simple, it is easily operated.
Description of the drawings
Fig. 1 is the pattern schematic diagram of the tungsten copper tin alloy powder that is prepared of preparation method of the present invention under the microscope.
Specific implementation mode
The technical solution further illustrated the present invention below by specific implementation mode.
Unless specific instructions, various raw materials of the invention are commercially available buys, or is prepared according to the conventional method of this field
It obtains.
Embodiment 1
1) 80% Production of Crystalline W Powder, 16% atomized copper powder and 4% glass putty by weight percentage, are weighed, wherein crystalline tungsten
The mesh number of powder takes 400 mesh, the mesh number of glass putty that 600 mesh, the mesh number of atomized copper powder is taken to take 400 mesh, Production of Crystalline W Powder, glass putty and atomization copper
Powder purity is all higher than 99.5%；
2) Production of Crystalline W Powder, atomized copper powder, glass putty are added in w-20 Double cone mixers, mix 30min；
3) material is taken out, it is high by being carried out under protection gas or reducing atmosphere in HYL-375-7Q steel belt type reducing furnaces
Temperature diffusion, set temperature is 950 degrees Celsius, diffusion time 5h, by diffusion of the glass putty in copper and in tungsten, realize copper with
The alloy of tungsten connects；
4) after coming out of the stove, crushing and screening is carried out by crusher, obtains tungsten copper tin alloy powder.
According to MPIF sampling methods (the MPIF sampling methods are powder metallurgy sampling method generally in the art), survey
The parameter for obtaining 4 different locations of alloy powder is as shown in table 1, the tungsten copper tin alloy powder being prepared using micro- sem observation, will
It is as shown in Figure 1 that amplification factor is adjusted to 200 times of later pictures.
Table 1
| It numbers sample position | Flow velocity (s/50g) | Apparent density (g/cm3) | Meso-position radius (μm) |
| 1 | 22.8 | 5.94 | 130 |
| 2 | 22.7 | 5.94 | 128 |
| 3 | 22.8 | 5.95 | 128 |
| 4 | 22.6 | 5.94 | 129 |
Embodiment 2
1) 60% Production of Crystalline W Powder, 37% atomized copper powder and 3% glass putty by weight percentage, are weighed, wherein crystalline tungsten
The mesh number of powder takes 500 mesh, the mesh number of glass putty that 650 mesh, the mesh number of atomized copper powder is taken to take 380 mesh, Production of Crystalline W Powder, glass putty and atomization copper
Powder purity is all higher than 99.5%；
2) Production of Crystalline W Powder, atomized copper powder, glass putty are added in w-20 Double cone mixers, mix 30min；
3) material is taken out, it is high by being carried out under protection gas or reducing atmosphere in HYL-375-7Q steel belt type reducing furnaces
Temperature diffusion, set temperature is 800 degrees Celsius, diffusion time 4h, by diffusion of the glass putty in copper and in tungsten, realize copper with
The alloy of tungsten connects；
4) after coming out of the stove, crushing and screening is carried out by crusher, obtains tungsten copper tin alloy powder.
According to MPIF sampling methods, the parameter for measuring 4 different locations of alloy powder is as shown in table 2：
Table 2
| It numbers sample position | Flow velocity (s/50g) | Apparent density (g/cm3) | Meso-position radius (μm) |
| 1 | 22.7 | 5.93 | 128 |
| 2 | 22.6 | 5.92 | 127 |
| 3 | 22.6 | 5.93 | 128 |
| 4 | 22.7 | 5.92 | 128 |
Embodiment 3
1) 40% Production of Crystalline W Powder, 58% atomized copper powder and 2% glass putty by weight percentage, are weighed, wherein crystalline tungsten
The mesh number of powder takes 600 mesh, the mesh number of glass putty that 600 mesh, the mesh number of atomized copper powder is taken to take 400 mesh, Production of Crystalline W Powder, glass putty and atomization copper
Powder purity is all higher than 99.5%；
2) Production of Crystalline W Powder, atomized copper powder, glass putty are added in w-20 Double cone mixers, mix 30min；
3) material is taken out, it is high by being carried out under protection gas or reducing atmosphere in HYL-375-7Q steel belt type reducing furnaces
Temperature diffusion, set temperature is 750 degrees Celsius, diffusion time 3h, by diffusion of the glass putty in copper and in tungsten, realize copper with
The alloy of tungsten connects；
4) after coming out of the stove, crushing and screening is carried out by crusher, obtains tungsten copper tin alloy powder.
According to MPIF sampling methods, the parameter for measuring 4 different locations of alloy powder is as shown in table 3：
Table 3
| It numbers sample position | Flow velocity (s/50g) | Apparent density (g/cm3) | Meso-position radius (μm) |
| 1 | 22.6 | 5.93 | 128 |
| 2 | 22.5 | 5.93 | 127 |
| 3 | 22.5 | 5.93 | 127 |
| 4 | 22.3 | 5.94 | 126 |
Embodiment 4
1) 70% Production of Crystalline W Powder, 26% atomized copper powder and 4% glass putty by weight percentage, are weighed, wherein crystalline tungsten
The mesh number of powder takes 400 mesh, the mesh number of glass putty that 600 mesh, the mesh number of atomized copper powder is taken to take 400 mesh, Production of Crystalline W Powder, glass putty and atomization copper
Powder purity is all higher than 99.5%；
2) Production of Crystalline W Powder, atomized copper powder, glass putty are added in w-20 Double cone mixers, mix 30min；
3) material is taken out, it is high by being carried out under protection gas or reducing atmosphere in HYL-375-7Q steel belt type reducing furnaces
Temperature diffusion, set temperature is 780 degrees Celsius, diffusion time 5h, by diffusion of the glass putty in copper and in tungsten, realize copper with
The alloy of tungsten connects；
4) after coming out of the stove, crushing and screening is carried out by crusher, obtains tungsten copper tin alloy powder.
According to MPIF sampling methods, the parameter for measuring 4 different locations of alloy powder is as shown in table 4：
Table 4
| It numbers sample position | Flow velocity (s/50g) | Apparent density (g/cm3) | Meso-position radius (μm) |
| 1 | 22.4 | 5.93 | 126 |
| 2 | 22.7 | 5.93 | 126 |
| 3 | 22.6 | 5.94 | 125 |
| 4 | 22.7 | 5.93 | 128 |
Embodiment 5
1) 50% Production of Crystalline W Powder, 47% atomized copper powder and 3% glass putty by weight percentage, are weighed, wherein crystalline tungsten
The mesh number of powder takes 350 mesh, the mesh number of glass putty that 550 mesh, the mesh number of atomized copper powder is taken to take 500 mesh, Production of Crystalline W Powder, glass putty and atomization copper
Powder purity is all higher than 99.5%；
2) Production of Crystalline W Powder, atomized copper powder, glass putty are added in w-20 Double cone mixers, mix 30min；
3) material is taken out, it is high by being carried out under protection gas or reducing atmosphere in HYL-375-7Q steel belt type reducing furnaces
Temperature diffusion, set temperature is 800 degrees Celsius, diffusion time 4h, by diffusion of the glass putty in copper and in tungsten, realize copper with
The alloy of tungsten connects；
4) after coming out of the stove, crushing and screening is carried out by crusher, obtains tungsten copper tin alloy powder.
According to MPIF sampling methods, the parameter for measuring 4 different locations of alloy powder is as shown in table 5：
Table 5
| It numbers sample position | Flow velocity (s/50g) | Apparent density (g/cm3) | Meso-position radius (μm) |
| 1 | 22.5 | 5.94 | 127 |
| 2 | 22.4 | 5.94 | 127 |
| 3 | 22.8 | 5.95 | 125 |
| 4 | 22.5 | 5.94 | 128 |
In conjunction with Fig. 1, preparation method of the invention, under the connection of tin, tungsten particle (A is marked in figure) is with copper particle (in figure
Mark B) it is combined together well, tungsten copper tin alloy meal component prepared by method of the invention is uniform, consistency is high, mobility
Energy is excellent, is easy to be molded, and solves the problems, such as easily to be segregated in traditional preparation methods, and preparation process is simple, easily operated.This
Tungsten copper tin alloy powder prepared by invention is suitable for production and breaks first material and contact material.
Applicant states that the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological processes, that is, it is above-mentioned detailed not mean that the present invention has to rely on
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
The addition of equivalence replacement and auxiliary element to each raw material of product of the present invention, the selection etc. of concrete mode all fall within the present invention's
Within protection domain and the open scope.
Claims (4)
1. a kind of preparation method of tungsten copper tin alloy powder, which is characterized in that include the following steps：
1）By weight percentage, weigh 40~80% Production of Crystalline W Powder, 10~60% atomized copper powder and 2~4% glass putty, institute
It is 100% to state the sum of weight percentage of Production of Crystalline W Powder, atomized copper powder and glass putty, -325 mesh of the Production of Crystalline W Powder, the tin
The mesh number of powder is -500 mesh, and the mesh number of the atomized copper powder is -320 mesh；
2）Production of Crystalline W Powder, atomized copper powder, glass putty are added in two-dimentional batch mixer and are mixed to get tungsten copper tin composite powder, incorporation time
For 20~40min；
3）By tungsten copper tin composite powder taking-up be placed in steel belt reduction furnace protection gas or reducing atmosphere under carry out 750~
950 DEG C of 3 ~ 5h of High temperature diffusion；
4）After tungsten copper tin composite powder after High temperature diffusion is taken out, crushing and screening is carried out by crusher, obtains the conjunction of tungsten copper tin
Bronze.
2. a kind of preparation method of tungsten copper tin alloy powder according to claim 1, which is characterized in that the Production of Crystalline W Powder,
The purity of the glass putty and the atomized copper powder is more than 99.5%.
3. a kind of preparation method of tungsten copper tin alloy powder according to claim 1, which is characterized in that the step 2）In
Two-dimentional batch mixer is Double cone mixer.
4. a kind of preparation method of tungsten copper tin alloy powder according to claim 1, which is characterized in that the step 3）Middle steel
Band reduction furnace is HYL-375-7Q steel belt type reducing furnaces.
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| CN107841703A (en) * | 2017-09-21 | 2018-03-27 | 芜湖鼎恒材料技术有限公司 | Tungsten copper coating material used for electronic packaging and preparation method thereof |
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| AU2008315429A1 (en) * | 2007-10-26 | 2009-04-30 | H.C. Starck Gmbh | Metal powder mixture and the use thereof |
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