CN104722753B - Preparing method of tungsten copper powder for perforating bullet type cover - Google Patents
Preparing method of tungsten copper powder for perforating bullet type cover Download PDFInfo
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- CN104722753B CN104722753B CN201510129616.3A CN201510129616A CN104722753B CN 104722753 B CN104722753 B CN 104722753B CN 201510129616 A CN201510129616 A CN 201510129616A CN 104722753 B CN104722753 B CN 104722753B
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Abstract
The invention discloses a preparing method of tungsten copper powder for a perforating bullet type cover, and relates to the technical field of manufacturing of petroleum perforating devices. According to the preparation method, copper acetate is selected as copper salt for wrapping tungsten powder particles, after being mixed, the copper acetate and the tungsten powder particles are calcinated in a hydrogen environment and are reduced to obtain copper-coated tungsten powder, then, the copper-coated tungsten powder is mixed with electrolytic copper powder, and therefore the tungsten copper powder is obtained. Based on the surface features of tungsten copper powder particles and a powder particle segregation mechanism that powder particles with different components have the phenomenon of segregation under the joint function of particles proportions and particle internal friction force, the preparing method solves the problems of increase of production costs and the low production efficiency caused by a degreasing presintering process on the bases of solving the problem of segregation in the processes of mixing and rotary pressing of tungsten powder and copper powder and guaranteeing the perforating performance of perforating bullets.
Description
Technical field
The present invention relates to petroleum perforation equipment preparing technical field, specifically relate to a kind of ammunition shaped cover of perforation tungsten copper
Powder preparation method.
Background technology
The punching quality of perforating bullet directly affects oil gas well capacity, and the penetration depth improving perforating bullet is perforating bullet development
The target of personnel's long-sought.Shaped charge material is the carrier of Mohaupt effect, and its performance directly affects the quality of jet quality.
Therefore, the development of shaped charge material technology is one of key technology of perforating bullet.Compared with conventional dense cavity liner, powder cover
Have that production efficiency is high, machining accuracy is high and jet bit drilling after do not produce pestle and the technical advantage such as block up.Meanwhile, the material of powder cover becomes
Divide flexible design, perforation aftereffect big.Therefore, powder cover is the Main way of current shaped charge material development.
High density based on tungsten and the high dynamic ductility of the high velocity of sound and copper, the powder cover in petroleum perforation operation is usual
Using w, cu powder as preferred material.It is shaped as coniform due to cavity liner, engineering generally adopts rotary pressure technology shape,
To make powder be subject to centrifugal action relatively evenly to fill mold cavity by means of former rotation.Due to tungsten, two kinds of powder of copper
There are greatest differences in density, granularity, grain shape and particle surface state aspect in material, the mixing uniformity of w, cu powder and
It is easy to produce segregation phenomena in spinning process so that the composition of Powder Liner after shaping and Density Distribution are uneven
Even, have a strong impact on the punching quality (wear depth and wear deep stability) of perforating bullet.Publication No. cn102069190a, publication date is
The Chinese patent document on May 25th, 2011 discloses a kind of preparation method of spy's deep penetrating charge cavity liner, has used mixed
Close granulating powders technique and cover base high-sintering process, solve the chromatography that many metal mixed powder occurs in mold process,
The technical barrier such as segregation and heavy metal powder hardly possible molding, improves cavity liner finished product density distributing homogeneity, recovers mixed powder
The plasticity of last constituent element, and eliminate the residual stress in compression molding for the powder, improve ductility and the penetration of metal jet
Ability.Through American Petroleum Institute's detection certification, registration, 127sdp45h16 type is assembled to the tungsten copper powder cover of this technology manufacture
Deep record is worn in wearing of api standard toroidal concrete target as deep as to 1539mm, having refreshed domestic perforating bullet in perforating bullet.But,
Compared with this Powder Liner and traditional cold pressure powder cover, have that technique is more complicated, defat pre-sinter process improves power consumption of polymer processing
And the low problem of production efficiency.
Content of the invention
It is contemplated that the defect existing for above-mentioned prior art and deficiency, provide a kind of ammunition shaped cover of perforation tungsten
Copper powders preparation method, this method based on the understanding to powder particle segregation mechanism to the surface characteristic of tungsten copper powder granule, that is,
It is particle specific gravity and the coefficient result of granule internal friction that different constituent element powder particles produce segregation, existing by solving
Tungsten, the copper powders segregation problems in mixing with spinning process, on the basis of ensureing perforating bullet punching quality, it is to avoid defat
Production cost caused by burn-in process increases and the relatively low problem of production efficiency.
The present invention is by being realized using following technical proposals:
A kind of ammunition shaped cover of perforation with tungsten copper powder preparation method it is characterised in that: select Schweinfurt green as tungsten powder particles
Cladding mantoquita, after Schweinfurt green is mixed with tungsten powder particles, calcining reduction obtains copper-clad tungsten powder, copper-clad tungsten powder in the hydrogen gas atmosphere
End is mixed to get tungsten copper powder with electrolytic copper powder again.
With 1000g tungsten powder as reference, specifically include following steps:
A, first by 31.3-47.05g Schweinfurt green in grinding in ball grinder 1-1.5 hour, subsequently, 1000g tungsten powder adds ball milling
In machine, mixing 1.5-2 hour, obtains mixed-powder material；
B, the mixed-powder obtaining material is obtained copper-clad tungsten powder in 450-500 DEG C of calcining reduction in hydrogen；
C, copper-clad tungsten powder are mixed in ball mill with electrolytic copper powder, and both mass ratioes are 82:18, are uniformly mixed
Tungsten copper powder.
May further comprise: addition 10mm water in described a step in ball mill and ball milling mixing formation in 30 minutes is half-dried
Mixed-powder material；
In described b step, the time of calcining reduction is 30 minutes.
May further comprise: in described step c add in ball mill with respect to tungsten copper powder mass ratio be 0.05～
0.08% machine oil.
The compound of the steel ball in ball mill and copper-clad tungsten powder and electrolytic copper powder is may further comprise: in described step c
Between mass ratio be 1:5-1:10, rotating speed is 200-300 rev/min, the mixing tungsten copper that can be uniformly mixed of 2-3 hour
Powder.
Compared with prior art, what the present invention was reached has the beneficial effect that:
1st, in the present invention, specifically select Schweinfurt green as tungsten powder particles cladding mantoquita, be on the one hand avoided that to environment
Pollution, on the other hand, improve the processability of powder, reduce the briquetting pressure of powder.
2nd, in the present invention, after Schweinfurt green is mixed with tungsten powder particles, in hydrogen, obtain copper-clad in 450-500 DEG C of calcining reduction
Tungsten powder.Now, a small amount of copper clad, on tungsten powder particles surface, forms a kind of clad of non-uniform Distribution on tungsten particle surface,
I.e. copper forms " copper tumor " on the smooth surface of tungsten particle, increased the surface roughness of tungsten powder particles, mixes in follow-up and copper powder
Improve the frictional force between tungsten powder particles and copper powder particle during conjunction, stop between tungsten powder particles and electrolytic copper powder granule
Isolation.Tungsten powder particles surface this be characterized as that mixed process and spinning process suppress the segregation between copper tungsten powder granule to create
Condition.Thus, uniformly and spinning copper tungsten powder cover Density Distribution is uniform to make the copper tungsten mixing meal component of preparation.
3rd, in the present invention, because the density contrast between tungsten powder and Schweinfurt green is very greatly it is easy to cause to mix non-uniform phenomenon,
For this reason, adding 10mm water in ball mill and ball milling mixing 30 minutes forms partially dried powder material, the mixed of tungsten powder and Schweinfurt green can be made
Close more uniform.
4th, in the present invention, the copper-clad tungsten powder after being covered to complete is mixed in ball mill with electrolytic copper powder, cuts to strengthen
The contribution to powder mixing uniformity for the effect of cutting, using ball milling mixing technology.In mechanical milling process, add machine oil and can press down further
Segregation between tungsten copper powder granule processed.
5th, in sum, this method is recognized to powder particle segregation mechanism based on to the surface characteristic of tungsten copper powder granule
Know, that is, different constituent element powder particles produce segregation is particle specific gravity and the coefficient result of granule internal friction, by solving
Existing tungsten, the copper powders segregation problems in mixing with spinning process, on the basis of ensureing perforating bullet punching quality, it is to avoid
Production cost caused by defat burn-in process increases and the relatively low problem of production efficiency.
Specific embodiment
Cover on the segregation phenomena being likely to occur in mixing and spinning process in order to solve perforating bullet tungsten copper powder, for tungsten
Powder particles surface crystallization is complete, smooth surface and the rougher feature in copper powder particle surface, possesses the tungsten powder particles of this feature,
Its intergranular friction power is less, uniformly favourable to the dynamically mutually filling between mixing initial stage tungsten, copper powder particles, but follow-up
Keep in mixed process mutually filling the intergranular friction Dipeptiven that given of uniform DYNAMIC DISTRIBUTION state low it is easy to mixed
Powder processing process (such as unload powder, claim powder, dress powder to be spinning etc.) after the completion of the middle and late stage of conjunction process and mixing leads to tungsten, copper powder
There is segregation phenomena between last granule.Hardness based on tungsten powder particles is far above copper, in order to increase the frictional force of tungsten powder particles, can
Carry out copper plating treatment using on tungsten powder particles surface, i.e. copper-clad tungsten treatment technology.Practice result shows, if on tungsten powder particles surface
Cladding amount of copper is excessively it is easy to cause mold sticking and copper clustering phenomena.Sticking to mould when the former makes powder cover shape, and the latter makes to penetrate
Wearing of hole bullet deeply reduces and wears deep data extremely unstable.Therefore the copper clad amount of tungsten powder particles must be controlled, abundant experimental results table
Bright, be about 1.0-1.5%(mass percent in the surface coated amount of copper of tungsten powder particles) it is optimal.
Embodiment 1: tungsten powder cladding 1.5%(mass percent) copper
Weigh 1.882kg Schweinfurt green to put in ball mill, add 6kg sintered carbide ball and ball milling added after 1.5 hours
40kg tungsten powder is simultaneously mixed 2 hours with rotating speed for 300 revs/min.Subsequently, 400mm water is added to continue ball milling 30 minutes.Powder is mixed
Compound loads in the hydrogen reducing furnace pushing at a slow speed 450 DEG C in boat, makes powder calcining reduction.After coming out of the stove, by the tungsten of coated copper
Powder 40.6kg and 9.4kg electrolytic copper powder load in ball mill, add 6kg sintered carbide ball and 40 grams of machine oil.Drum's speed of rotation is
300 revs/min, mixing unloaded powder after 2 hours.The tungsten copper mixed powder of preparation is pressed normal spinning process formed powder cover, is assemblied in
In sdp39hmx25-2 model perforating bullet, wearing deep is 810mm.
Embodiment 2: tungsten powder cladding 1%(mass percent) copper
Weigh 1.255kg Schweinfurt green to put in ball mill, add 6kg sintered carbide ball and ball milling adds 40kg after 1 hour
Tungsten powder is simultaneously mixed 2 hours with rotating speed for 300 revs/min.Subsequently, 400mm water is added to continue ball milling 30 minutes.By mixture of powders
Load in the hydrogen reducing furnace pushing at a slow speed 450 DEG C in boat, make powder calcining reduction.After coming out of the stove, by the tungsten powder of coated copper
40.4kg and 9.6kg electrolytic copper powder load in ball mill, add 5kg sintered carbide ball and 40 grams of machine oil.Machine oil is regular engine oil.
Drum's speed of rotation is 300 revs/min, and mixing unloaded powder after 2 hours.The tungsten copper mixed powder of preparation is pressed normal spinning process and shapes powder
End cover, is assemblied in sdp39hmx25-2 model perforating bullet, and wearing deep is 850mm.
Claims (4)
1. a kind of ammunition shaped cover of perforation with tungsten copper powder preparation method it is characterised in that: select Schweinfurt green as tungsten powder particles bag
Cover and use mantoquita, after Schweinfurt green is mixed with tungsten powder particles, calcining reduction obtains copper-clad tungsten powder, copper-clad tungsten powder in the hydrogen gas atmosphere
It is mixed to get tungsten copper powder with electrolytic copper powder again；
With 1000g tungsten powder as reference, specifically include following steps:
A, first by 31.3-47.05g Schweinfurt green in grinding in ball grinder 1-1.5 hour, subsequently, 1000g tungsten powder adds in ball mill
Mixing 1.5-2 hour, obtains mixed-powder material；
B, the mixed-powder obtaining material is obtained copper-clad tungsten powder in 450-500 DEG C of calcining reduction in hydrogen；
C, copper-clad tungsten powder are mixed in ball mill with electrolytic copper powder, and both mass ratios are 82:18, the tungsten being uniformly mixed
Copper powders；
May further comprise: in described a step and add 10mm water in ball mill and half-dried the mixing of ball milling mixing formation in 30 minutes
Close powder materials.
2. a kind of ammunition shaped cover of perforation according to claim 1 with tungsten copper powder preparation method it is characterised in that: described b
In step, the time of calcining reduction is 30 minutes.
3. a kind of ammunition shaped cover of perforation according to claim 1 with tungsten copper powder preparation method it is characterised in that: described c
May further comprise: in step and add the machine oil being 0.05～0.08% with respect to tungsten copper powder mass ratio in ball mill.
4. a kind of ammunition shaped cover of perforation according to claim 1 with tungsten copper powder preparation method it is characterised in that: described c
May further comprise: in step that between the steel ball in ball mill and copper-clad tungsten powder and the compound of electrolytic copper powder, mass ratio is 1:
5-1:10, rotating speed is 200-300 rev/min, the tungsten copper powder that mixing 2-3 hour can be uniformly mixed.
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| CN201510129616.3A CN104722753B (en) | 2015-03-24 | 2015-03-24 | Preparing method of tungsten copper powder for perforating bullet type cover |
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| CN104722753B true CN104722753B (en) | 2017-01-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268965A (en) * | 2015-12-04 | 2016-01-27 | 四川石油射孔器材有限责任公司 | Tungsten-copper composite powder for perforating charge achieving super-deep penetration and making technology thereof |
| CN108655392B (en) * | 2018-05-18 | 2020-02-04 | 有研粉末新材料（北京）有限公司 | Preparation method of copper-coated chromium composite powder |
| CN110014163A (en) * | 2019-04-19 | 2019-07-16 | 广东省材料与加工研究所 | Tungsten alloy powder and its preparation method and application |
| CN113523295B (en) * | 2021-07-20 | 2023-01-17 | 天津大学 | Preparation method of copper-coated tungsten spherical composite powder for additive manufacturing |
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| EP1140397B1 (en) * | 1998-12-16 | 2003-01-02 | Celsia S.P.A. | Process for the production of tungsten-copper composite sinterable powders |
| KR100674216B1 (en) * | 2006-06-21 | 2007-01-25 | 주식회사 쎄타텍 | Manufacturing method of tungsten-copper alloy part |
| CN1931482A (en) * | 2006-10-13 | 2007-03-21 | 武汉理工大学 | Prepn process of composite W-Cu powder for preparing high density alloy |
| CN102747239A (en) * | 2012-07-06 | 2012-10-24 | 中国西电电气股份有限公司 | Manufacturing method for copper-tungsten alloy of a tungsten framework |
| CN103695749A (en) * | 2013-12-02 | 2014-04-02 | 北方斯伦贝谢油田技术（西安）有限公司 | Shaped charge cover material of perforating charge |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1140397B1 (en) * | 1998-12-16 | 2003-01-02 | Celsia S.P.A. | Process for the production of tungsten-copper composite sinterable powders |
| KR100674216B1 (en) * | 2006-06-21 | 2007-01-25 | 주식회사 쎄타텍 | Manufacturing method of tungsten-copper alloy part |
| CN1931482A (en) * | 2006-10-13 | 2007-03-21 | 武汉理工大学 | Prepn process of composite W-Cu powder for preparing high density alloy |
| CN102747239A (en) * | 2012-07-06 | 2012-10-24 | 中国西电电气股份有限公司 | Manufacturing method for copper-tungsten alloy of a tungsten framework |
| CN103695749A (en) * | 2013-12-02 | 2014-04-02 | 北方斯伦贝谢油田技术（西安）有限公司 | Shaped charge cover material of perforating charge |
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Effective date of registration: 20190731 Address after: 100120 Liupu Kang, Xicheng District, Beijing Co-patentee after: Chuanqing Drilling Engineering Co., Ltd. of China National Petroleum Corporation Patentee after: China Petroleum and Natural Gas Group Co., Ltd. Co-patentee after: China National Petroleum Group Logging Co., Ltd. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: Chuanqing Drilling Engineering Co., Ltd. of China National Petroleum Corporation |