CN108213442A - A kind of green compact of high-specific gravity tungsten alloy plank fold burning method - Google Patents
A kind of green compact of high-specific gravity tungsten alloy plank fold burning method Download PDFInfo
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- CN108213442A CN108213442A CN201810049139.3A CN201810049139A CN108213442A CN 108213442 A CN108213442 A CN 108213442A CN 201810049139 A CN201810049139 A CN 201810049139A CN 108213442 A CN108213442 A CN 108213442A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1035—Liquid phase sintering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The invention belongs to powder metallurgical technologies, and in particular to a kind of green compact of high-specific gravity tungsten alloy plank fold burning method, step 1, raw material are weighed according to formula, add in into reaction kettle 3 5h of ball milling mixing, mixed raw material is obtained after cooling；Step 2, mixed raw material is added in and 5 8h is suppressed into mold, then slow pressure release forms tungsten plate；Step 3, tungsten powder particulate is added in into deionized water, then adds in polyethylene glycol, ultrasonic agitation to formation tungsten powder suspension；Step 4, tungsten plate is put into 20 40min of ultrasonic reaction in tungsten powder suspension, Pressurized-heated is carried out after taking-up and dries 2 4h, natural cooling obtains tungsten alloy burn-in board；Step 5, several tungsten alloy burn-in boards are stacked together, high-specific gravity tungsten alloy plank is obtained after liquid-phase sintering.The present invention solves the problem of large-sized high-specific gravity tungsten alloy plank underbead crack is more, and yield rate is low, and the tungsten alloy plank of preparation has the characteristics that structure consolidation, crackle are few, and hardness, intensity and wearability are promoted steadily.
Description
Technical field
The invention belongs to powder metallurgical technologies, and in particular to a kind of green compact of high-specific gravity tungsten alloy plank fold burning method.
Background technology
High-specific gravity tungsten alloy be using tungsten as matrix (mass fraction of tungsten is usually 80-97%), add a small amount of nickel, iron, copper,
The elements such as cobalt, molybdenum, chromium, are prepared using lqiuid phase sintering method.High-specific gravity tungsten alloy not only has high density (up to 16.5-
19.0g/cm3), also with intensity is high, hardness is high, coefficient of thermal expansion is small, thermal conductivity factor is big, anti-oxidant, corrosion-resistant, mechanical processing
Performance is good, good plasticity and the advantages that good ray absorption capacity (higher 30-40% than lead).Therefore, high-specific gravity tungsten alloy
It has obtained widely should in the civilian industries such as the war industrys such as Aeronautics and Astronautics, weapons and machinery, electric appliance, instrument, metallurgy, medical treatment
With.
The high-specific gravity tungsten alloy applied at present mainly has tungsten ferronickel and tungsten ambrose alloy series, mainly passes through powder metallurgy legal system
It is standby；However according to the difference of product size shape, preparation process is also not quite similar.In the prior art, it is related to high-gravity tungsten conjunction
The preparation method of golden plate material is less.Chinese patent " a kind of preparation method of tungsten base high-specific-gravity alloy thin-sheet -- CN101983806A "
In, by suppressing the blank after 2-4mm, sinter the thin plate that 0.1-1.5mm is rolled down to after slab into；Since slab is using molding pressure
Type is made, is limited by die size, this method can only be suitble to the processing of size smaller thin plate, and to length compared with it is long, thickness is big
It is then helpless in the plank of more than 2mm.Another Chinese patent " preparation method of tungsten base high-specific-gravity alloy thin-sheet --
CN101069944 " uses powqder rolling process to prepare green compact of the thickness for 1-3mm, after sintering cold rolling be processed into thin plate；This method
It is more than the sheet fabrication of 3mm that can not realize thickness.Chinese patent " preparation method of high-specific gravity tungsten alloy plank --
CN102389975A " folds burning method using green compact, and including (I) batch mixing, (II) compression moulding green compact, (III) stacks multi-disc green compact
High-temperature liquid is carried out together and is stacked burning process, additionally provides and burning method is folded using cold rolling base, including (I) batch mixing, (II) compression moulding,
(III) liquid-phase sintering, (IV) sintered blank cold rolling, the processing of (V) surface cleaning, (VI) will be stacked together progress through multi-disc cold rolling base
High-temperature liquid is stacked burning process；Although this method provides large-sized high-specific gravity tungsten alloy plank, but in sintering with pressurizeing
Easily there are a large amount of blind cracks in Cheng Zhong, plate surface and plank, product qualification rate is not high.Therefore, the height of large-size is prepared
Than gravity tungsten alloy plank there are it is larger the problem of.
Invention content
For the problems of the prior art, the present invention provides a kind of green compact of high-specific gravity tungsten alloy plank and folds burning method, solves
The problem of large-sized high-specific gravity tungsten alloy plank underbead crack is more, and yield rate is low, the tungsten alloy plank of preparation have knot
The characteristics of structure consolidation, crackle are few, hardness, intensity and wearability are promoted steadily.
For realization more than technical purpose, the technical scheme is that：
A kind of green compact of high-specific gravity tungsten alloy plank fold burning method, and the green compact fold burning method in accordance with the following steps：
Step 1, raw material is weighed according to formula, adds in into reaction kettle ball milling mixing 3-5h, mixed raw material is obtained after cooling；
Step 2, mixed raw material is added in and 5-8h is suppressed into mold, then slow pressure release obtains tungsten plate；
Step 3, tungsten powder particulate is added in into deionized water, then adds in polyethylene glycol, ultrasonic agitation to formation tungsten powder
Suspension；
Step 4, tungsten plate is put into ultrasonic reaction 20-40min in tungsten powder suspension, Pressurized-heated drying 2- is carried out after taking-up
4h, natural cooling obtain tungsten alloy burn-in board；
Step 5, several tungsten alloy burn-in boards are stacked together, high-specific gravity tungsten alloy plank is obtained after liquid-phase sintering.
Formula in the step 1 is prepared according to following quality proportioning：Tungsten powder 92-96%, nickel 2-3%, iron are remaining.
The temperature of ball milling mixing in the step 1 is 150-200 DEG C.
The pressure of compacting in the step 2 is 100-110MPa, and the pressure decrease speed of the slow pressure release is 1-
3MPa/min。
A concentration of 3-7g/L of tungsten powder particulate in deionized water in the step 3, the addition of the polyethylene glycol
It is the 10-15% of tungsten powder fine grain quality.
The temperature of ultrasonic agitation in the step 3 is 50-60 DEG C, supersonic frequency 10-30kHz.
The temperature of ultrasonic reaction in the step 4 is 80-90 DEG C, frequency 30-80kHz.
The pressure of Pressurized-heated drying in the step 4 is 60-80MPa, and temperature is 230-260 DEG C.
The tungsten alloy burn-in board of the step 5 stacks number as 3-20.
Liquid-phase sintering in the step 5 uses the high temperature sintering furnace of hydrogen shield, and sintering temperature is 1400-1600 DEG C,
The time of the liquid-phase sintering is 2-5h.
Raw material is configured according to recipe requirements in step 1, is then mixed raw material by way of ball milling, the mode of ball milling mixing
Powder can not only be refined, while can be removed the impurity on powder surface by temperature, obtain more pure powder.
Powder is put into mold and suppresses by step 2, can form platy structure, while in slow pressure leak process, can
Ensure that form plate presses structure, avoid plate being caused to crush again during quick pressure releasing, compact structure can be obtained
Tungsten alloy plate.
Step 3 adds in tungsten powder particulate in deionized water, then using polyethylene glycol as dispersant, in ultrasonic agitation process
It is middle that tungsten powder is dispersed in aqueous solution, suspension is formed, while polyethylene glycol has good dissolving in water, can increase
The viscosity of ionized water is formed simultaneously good dispersion.
Tungsten plate is put into ultrasonic reaction in graphene tungsten powder suspension and can separately change in the gap in tungsten plate by step 4, together
When under vibrating conditions, tungsten powder particulate progresses into gap, and gap is filled up, then under the conditions of Pressurized-heated, deionized water
Gaseous state evaporation is converted by liquid with polyethylene glycol, and tungsten powder particulate stays in gap and forms one with tungsten plate, reaches and fills up seam
The effect of gap obtains tungsten alloy burn-in board after cooling, tungsten alloy burn-in board internal interstices are repaired at this time, and it is tight to form structure
It is close, the tungsten alloy thin plate of inside and outside flawless.
Several tungsten alloy burn-in boards are formed high-specific gravity tungsten alloy plank by step 5 in liquid sintering process, are stacked at this time
Tungsten alloy burn-in board inside flawless, obtained tungsten alloy plank underbead crack substantially reduces, and structure consolidation, hardness, strong
Degree and wearability are improved significantly.
From the above, it can be seen that the present invention has advantages below：
1. the present invention solves the problem of large-sized high-specific gravity tungsten alloy plank underbead crack is more, and yield rate is low, system
Standby tungsten alloy plank has the characteristics that structure consolidation, crackle are few, and hardness, intensity and wearability are promoted steadily.
2. the present invention is pre-processed by the way of ball milling, the particle size uniformity of raw material can be effectively promoted, simultaneously
Also impurity can be removed, promotes the purity of raw material.
3. powder pressing can be molded by the present invention using mold compacting, liquid phase compression moulding can be effectively prevented and brought
Gap it is bigger than normal the problem of, greatly improve the structure degree of packing of pressboard.
4. the present invention is filled up by the way of ultrasound using tungsten powder suspension is secondary to the progress of tungsten plate stitch gap, can drop significantly
The gap amount of low tungsten plate in itself, prevents the generation in gap.
5. the present invention can not only utilize the volatility of deionized water and polyethylene glycol to remove by the way of Pressurized-heated
Plank impurity, while filled up gap using tungsten powder particulate, and under an increased pressure can be by crackle again consolidation, so as to reach
To flawless state.
Specific embodiment
The present invention will be described in detail in conjunction with the embodiments, but does not do any restriction to the claim of the present invention.
Embodiment 1
A kind of green compact of high-specific gravity tungsten alloy plank fold burning method, and the green compact fold burning method in accordance with the following steps：
Step 1, raw material is weighed according to formula, adds in into reaction kettle ball milling mixing 3h, mixed raw material is obtained after cooling；
Step 2, mixed raw material is added in and 5h is suppressed into mold, then slow pressure release obtains tungsten plate；
Step 3, tungsten powder particulate is added in into deionized water, then adds in polyethylene glycol, ultrasonic agitation to formation tungsten powder
Suspension；
Step 4, tungsten plate is put into ultrasonic reaction 20min in tungsten powder suspension, Pressurized-heated drying 2-4h is carried out after taking-up,
Natural cooling obtains tungsten alloy burn-in board；
Step 5, several tungsten alloy burn-in boards are stacked together, high-specific gravity tungsten alloy plank is obtained after liquid-phase sintering.
Formula in the step 1 is prepared according to following quality proportioning：Tungsten powder 92%, nickel 2%, iron 6%.
The temperature of ball milling mixing in the step 1 is 150 DEG C.
The pressure of compacting in the step 2 is 100MPa, and the pressure decrease speed of the slow pressure release is 1MPa/min.
A concentration of 3g/L of tungsten powder particulate in deionized water in the step 3, the addition of the polyethylene glycol are
The 10% of tungsten powder fine grain quality.
The temperature of ultrasonic agitation in the step 3 is 50 DEG C, supersonic frequency 10kHz.
The temperature of ultrasonic reaction in the step 4 is 80 DEG C, frequency 30kHz.
The pressure of Pressurized-heated drying in the step 4 is 60MPa, and temperature is 230 DEG C.
The number that stacks of the tungsten alloy burn-in board of the step 5 is 3.
Liquid-phase sintering in the step 5 uses the high temperature sintering furnace of hydrogen shield, and sintering temperature is 1400 DEG C, the liquid
The time of phase sintering is 2h.
Embodiment 2
A kind of green compact of high-specific gravity tungsten alloy plank fold burning method, and the green compact fold burning method in accordance with the following steps：
Step 1, raw material is weighed according to formula, adds in into reaction kettle ball milling mixing 5h, mixed raw material is obtained after cooling；
Step 2, mixed raw material is added in and 8h is suppressed into mold, then slow pressure release obtains tungsten plate；
Step 3, tungsten powder particulate is added in into deionized water, then adds in polyethylene glycol, ultrasonic agitation to formation tungsten powder
Suspension；
Step 4, tungsten plate is put into ultrasonic reaction 40min in tungsten powder suspension, Pressurized-heated drying 2-4h is carried out after taking-up,
Natural cooling obtains tungsten alloy burn-in board；
Step 5, several tungsten alloy burn-in boards are stacked together, high-specific gravity tungsten alloy plank is obtained after liquid-phase sintering.
Formula in the step 1 is prepared according to following quality proportioning：Tungsten powder 96%, nickel 3%, iron are remaining.
The temperature of ball milling mixing in the step 1 is 200 DEG C.
The pressure of compacting in the step 2 is 110MPa, and the pressure decrease speed of the slow pressure release is 3MPa/min.
A concentration of 7g/L of tungsten powder particulate in deionized water in the step 3, the addition of the polyethylene glycol are
The 15% of tungsten powder fine grain quality.
The temperature of ultrasonic agitation in the step 3 is 60 DEG C, supersonic frequency 30kHz.
The temperature of ultrasonic reaction in the step 4 is 90 DEG C, frequency 80kHz.
The pressure of Pressurized-heated drying in the step 4 is 80MPa, and temperature is 260 DEG C.
The number that stacks of the tungsten alloy burn-in board of the step 5 is 20.
Liquid-phase sintering in the step 5 uses the high temperature sintering furnace of hydrogen shield, and sintering temperature is 1600 DEG C, the liquid
The time of phase sintering is 5h.
Embodiment 3
A kind of green compact of high-specific gravity tungsten alloy plank fold burning method, and the green compact fold burning method in accordance with the following steps：
Step 1, raw material is weighed according to formula, adds in into reaction kettle ball milling mixing 4h, mixed raw material is obtained after cooling；
Step 2, mixed raw material is added in and 6h is suppressed into mold, then slow pressure release obtains tungsten plate；
Step 3, tungsten powder particulate is added in into deionized water, then adds in polyethylene glycol, ultrasonic agitation to formation tungsten powder
Suspension；
Step 4, tungsten plate is put into ultrasonic reaction 30min in tungsten powder suspension, Pressurized-heated drying 2-4h is carried out after taking-up,
Natural cooling obtains tungsten alloy burn-in board；
Step 5, several tungsten alloy burn-in boards are stacked together, high-specific gravity tungsten alloy plank is obtained after liquid-phase sintering.
Formula in the step 1 is prepared according to following quality proportioning：Tungsten powder 94%, nickel 3%, iron 3%.
The temperature of ball milling mixing in the step 1 is 170 DEG C.
The pressure of compacting in the step 2 is 105MPa, and the pressure decrease speed of the slow pressure release is 2MPa/min.
A concentration of 5g/L of tungsten powder particulate in deionized water in the step 3, the addition of the polyethylene glycol are
The 13% of tungsten powder fine grain quality.
The temperature of ultrasonic agitation in the step 3 is 55 DEG C, supersonic frequency 20kHz.
The temperature of ultrasonic reaction in the step 4 is 85 DEG C, frequency 50kHz.
The pressure of Pressurized-heated drying in the step 4 is 70MPa, and temperature is 240 DEG C.
The number that stacks of the tungsten alloy burn-in board of the step 5 is 10.
Liquid-phase sintering in the step 5 uses the high temperature sintering furnace of hydrogen shield, and sintering temperature is 1500 DEG C, the liquid
The time of phase sintering is 3h.
Embodiment 4
A kind of green compact of high-specific gravity tungsten alloy plank fold burning method, and the green compact fold burning method in accordance with the following steps：
Step 1, raw material is weighed according to formula, adds in into reaction kettle ball milling mixing 5h, mixed raw material is obtained after cooling；
Step 2, mixed raw material is added in and 7h is suppressed into mold, then slow pressure release obtains tungsten plate；
Step 3, tungsten powder particulate is added in into deionized water, then adds in polyethylene glycol, ultrasonic agitation to formation tungsten powder
Suspension；
Step 4, tungsten plate is put into ultrasonic reaction 35min in tungsten powder suspension, Pressurized-heated drying 4h is carried out after taking-up, from
So cooling obtains tungsten alloy burn-in board；
Step 5, several tungsten alloy burn-in boards are stacked together, high-specific gravity tungsten alloy plank is obtained after liquid-phase sintering.
Formula in the step 1 is prepared according to following quality proportioning：Tungsten powder 95%, nickel 3%, iron 2%.
The temperature of ball milling mixing in the step 1 is 180 DEG C.
The pressure of compacting in the step 2 is 105MPa, and the pressure decrease speed of the slow pressure release is 3MPa/min.
A concentration of 6g/L of tungsten powder particulate in deionized water in the step 3, the addition of the polyethylene glycol are
The 13% of tungsten powder fine grain quality.
The temperature of ultrasonic agitation in the step 3 is 55 DEG C, supersonic frequency 25kHz.
The temperature of ultrasonic reaction in the step 4 is 85 DEG C, frequency 60kHz.
The pressure of Pressurized-heated drying in the step 4 is 75MPa, and temperature is 250 DEG C.
The number that stacks of the tungsten alloy burn-in board of the step 5 is 15.
Liquid-phase sintering in the step 5 uses the high temperature sintering furnace of hydrogen shield, and sintering temperature is 1550 DEG C, the liquid
The time of phase sintering is 4h.
Performance test
Comparative example is using Chinese patent " preparation method of high-specific gravity tungsten alloy plank -- CN102389975A " using green compact
High-specific gravity tungsten alloy plank prepared by folded burning method.
In performance test, alloy density is measured using Archimedes's drainage, using HMAS-C1000SZA microhardness testers
The microhardness of alloy is measured, alloy polishing machine is measured, while using AG- using ML-100 types abrasive tester
I250KN precision universal materials experimental machine measures the compression strength of alloy.
In conclusion the present invention has the following advantages：
1. the present invention solves the problem of large-sized high-specific gravity tungsten alloy plank underbead crack is more, and yield rate is low, system
Standby tungsten alloy plank has the characteristics that structure consolidation, crackle are few, and hardness, intensity and wearability are promoted steadily.
2. the present invention is pre-processed by the way of ball milling, the particle size uniformity of raw material can be effectively promoted, simultaneously
Also impurity can be removed, promotes the purity of raw material.
3. powder pressing can be molded by the present invention using mold compacting, liquid phase compression moulding can be effectively prevented and brought
Gap it is bigger than normal the problem of, greatly improve the structure degree of packing of pressboard.
4. the present invention is filled up by the way of ultrasound using tungsten powder suspension is secondary to the progress of tungsten plate stitch gap, can drop significantly
The gap amount of low tungsten plate in itself, prevents the generation in gap.
5. the present invention can not only utilize the volatility of deionized water and polyethylene glycol to remove by the way of Pressurized-heated
Plank impurity, while filled up gap using tungsten powder particulate, and under an increased pressure can be by crackle again consolidation, so as to reach
To flawless state.
It is understood that above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to this
The described technical solution of inventive embodiments.It will be understood by those of ordinary skill in the art that still the present invention can be carried out
Modification or equivalent replacement, to reach identical technique effect；As long as meeting using needs, all protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of green compact of high-specific gravity tungsten alloy plank fold burning method, it is characterised in that：The green compact fold burning method in accordance with the following steps：
Step 1, raw material is weighed according to formula, adds in into reaction kettle ball milling mixing 3-5h, mixed raw material is obtained after cooling；
Step 2, mixed raw material is added in and 5-8h is suppressed into mold, then slow pressure release obtains tungsten plate；
Step 3, tungsten powder particulate is added in into deionized water, then adds in polyethylene glycol, ultrasonic agitation is suspended to tungsten powder is formed
Liquid；
Step 4, tungsten plate is put into ultrasonic reaction 20-40min in tungsten powder suspension, Pressurized-heated drying 2-4h is carried out after taking-up,
Natural cooling obtains tungsten alloy burn-in board；
Step 5, several tungsten alloy burn-in boards are stacked together, high-specific gravity tungsten alloy plank is obtained after liquid-phase sintering.
2. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 1 fold burning method, it is characterised in that：The step
Formula in 1 is prepared according to following quality proportioning：Tungsten powder 92-96%, nickel 2-3%, iron are remaining.
3. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 1 fold burning method, it is characterised in that：The step
The temperature of ball milling mixing in 1 is 150-200 DEG C.
4. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 1 fold burning method, it is characterised in that：The step
The pressure of compacting in 2 is 100-110MPa, and the pressure decrease speed of the slow pressure release is 1-3MPa/min.
5. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 1 fold burning method, it is characterised in that：The step
A concentration of 3-7g/L of tungsten powder particulate in deionized water in 3, the addition of the polyethylene glycol is tungsten powder fine grain quality
10-15%.
6. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 1 fold burning method, it is characterised in that：The step
The temperature of ultrasonic agitation in 3 is 50-60 DEG C, supersonic frequency 10-30kHz.
7. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 1 fold burning method, it is characterised in that：The step
The temperature of ultrasonic reaction in 4 is 80-90 DEG C, frequency 30-80kHz.
8. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 1 fold burning method, it is characterised in that：The step
The pressure of Pressurized-heated drying in 4 is 60-80MPa, and temperature is 230-260 DEG C.
9. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 1 fold burning method, it is characterised in that：The step
5 tungsten alloy burn-in board stacks number as 3-20.
10. a kind of green compact of high-specific gravity tungsten alloy plank according to claim 10 fold burning method, it is characterised in that：The step
Liquid-phase sintering in rapid 5 uses the high temperature sintering furnace of hydrogen shield, and sintering temperature is 1400-1600 DEG C, the liquid-phase sintering
Time is 2-5h.
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| CN201810049139.3A CN108213442B (en) | 2018-01-18 | 2018-01-18 | A kind of folded burning method of the green compact of high-specific gravity tungsten alloy plate |
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| CN201810049139.3A CN108213442B (en) | 2018-01-18 | 2018-01-18 | A kind of folded burning method of the green compact of high-specific gravity tungsten alloy plate |
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| CN108213442B CN108213442B (en) | 2019-08-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111482610A (en) * | 2020-04-15 | 2020-08-04 | 无锡乐普金属科技有限公司 | Preparation method of tungsten-nickel-iron alloy material |
| CN112080676A (en) * | 2020-08-12 | 2020-12-15 | 西安理工大学 | Flaky powder micro-laminated W-based composite material and preparation method thereof |
| CN112442610A (en) * | 2020-11-24 | 2021-03-05 | 深圳市注成科技股份有限公司 | Preparation method of nano tungsten alloy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111482610A (en) * | 2020-04-15 | 2020-08-04 | 无锡乐普金属科技有限公司 | Preparation method of tungsten-nickel-iron alloy material |
| CN112080676A (en) * | 2020-08-12 | 2020-12-15 | 西安理工大学 | Flaky powder micro-laminated W-based composite material and preparation method thereof |
| CN112442610A (en) * | 2020-11-24 | 2021-03-05 | 深圳市注成科技股份有限公司 | Preparation method of nano tungsten alloy |
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