CN107570714A - Metal powder preparation method and device based on thermal spraying - Google Patents
Metal powder preparation method and device based on thermal spraying Download PDFInfo
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- CN107570714A CN107570714A CN201710537290.7A CN201710537290A CN107570714A CN 107570714 A CN107570714 A CN 107570714A CN 201710537290 A CN201710537290 A CN 201710537290A CN 107570714 A CN107570714 A CN 107570714A
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Abstract
The present invention relates to a kind of based on thermal spraying, inexpensive metal powder preparation method and device, metal drop beam is formed by transferring raw material silk rod, using thermal spraying generating means, cooling is accelerated to be atomized using high speed compression gas front, then metal target powder is made by two-stage classified filtering device, powder size is adjustable；This method eliminates the crucible for smelting required for traditional atomization, simple and effective.
Description
Technical field
The present invention relates to metal powder preparation method, belongs to powder metallurgical technology, and heat is utilized more particularly to one kind
Spraying technology, gases at high pressure cooling means prepare the method and device of metal dust.
Background technology
Rapid shaping or 3D printing are developed rapidly in recent years, and the special ability of its flexible manufacturing is also more and more
Field be applied.But due to its higher cost and price, constrain its industrial development space.
Metal dust is one of rapid shaping or the most important raw material of 3D printing technique, and its cost accounts for the 1/ of totle drilling cost
More than 3.Therefore the manufacturing cost of dusty material is reduced, for reducing rapid shaping or 3D printing cost, extends its commercial Application again
Important meaning.
Metal dust is prepared and can be made using chemical method, Mechanical Method and mixing method, and wherein Mechanical Method application is most, and at this
Wherein, atomization is most widely used.The advantage of atomization includes：Dusty material out of roundness is high, and size range is narrow and defect is few.
Chemical method and mixing method long flow path, efficiency are low, and powder quality is affected by many factors, and control difficulty is big.
Atomization can also be subdivided into according to atomizing medium, gas atomization, inert gas atomizer, rotation electrode inert gas
Atomization etc..Gas atomization is atomization method most easy, that cost is minimum.Principle is to allow the raw material of certain size passing through crucible
Or it is electrode melting after, be atomized using high-speed gas, then natural cooling obtains dusty material.
There are two difficult points to restrict improved efficiency in the prior art：When by crucible or electrode melting raw material into liquid, because
Higher requirement is proposed for the size of crucible or electrode melting all to raw material and addition, thus limits efficiency；Second, atomization
Molten drop natural cooling afterwards is frozen into powder, extends preparation process, limits preparation efficiency.
Inexpensive powder technology of preparing exploitation, can drive the fast development of Quick-forming or 3D printing technique.
The content of the invention
It is an object of the invention to provide produce metal using thermal spraying low technical formation metal drop, gases at high pressure cooling
The method of powder, solves the problems such as efficiency that existing atomization is brought by crucible for smelting technical method is low.
For achieving the above object, the present invention adopts the following technical scheme that：
Inexpensive metal powder preparation method and device, by continuous conveying raw material thread rod 2, utilize thermal spraying generating means
1 forms thermal spray metal molten drop 5, wire feed rate and thermal spraying generator parameter by flow of the compressed gas gauge 3, compressed gas 4, with
And control system 18 controls.
In metal drop beam front using high-speed gas beam 6 caused by reverse high pressure gas generator 7 to thermal jet oil gidling
Category molten drop is cooled down and is atomized, and its speed and flow are controlled by cooling gas flowmeter 8.
By oxygen sensor 10, oxygen content, temperature in 12 real-time detection chambers of pressure sensor 11 and temperature sensor
Degree and pressure and other parameters, and control system 18 is transferred to, control system is provided to feed back and adjust in real time according to internal database and closed
The operational factor of key component.
There are individual metal bath and gas vent 9 in cavity bottom, entered with the metal drop of compressed gas by exporting
First level filtering device 13 and powder collect device 14, while are cooled down, and meet the powder in target size section and can be collected in and search
In storage 14；Remaining to enter secondary filter 15 and two level powder catcher 16, meeting the powder of target size can be collected
In 16, remaining part enters terminal collector 17.
Filtering screen size in filter and powder catcher can be adjustable according to target size.
Inexpensive metal powder preparation method and device, the wire-feeding rate 10-25g/min of thermal spraying generating means, argon gas stream
Measure 12-20L/min, nitrogen flow 10-15L/min, electric current 300-600A, voltage 60-100V, hydrogen flowing quantity 0-8L/min, spray
Away from 80-500mm.
Technology is described as follows：
Raw material are used as using raw material thread rod 2, automation, quantity-produced needs can be met.
Thermal spray metal molten drop 5 is formed using thermal spraying generating means 1, the crucible required for can exempting in conventional method melts
Refining, on the one hand realizes continuous production, improves preparation efficiency, has on the other hand also refined molten drop and final powder size.
Wire feed rate and thermal spraying generator parameter are by flow of the compressed gas gauge 3, compressed gas 4, and control system 18
Control.Metal drop beam is produced using thermal spraying generator, on the one hand realizes continuous process, another aspect molten drop is high
Pressure, speed is fast, size is small and uniform, is advantageous to improve powder quality；Meanwhile the defects of also reducing final powder rate.Foundation
Metal dust special type, the size of molten drop beam and air pressure can be adjusted by adjusting the parameters such as air pressure, flow.
The wire-feeding rate 10-150g/min of thermal spraying generating means, argon flow amount 12-20L/min, nitrogen flow 10-15L/
Min, electric current 300-600A, voltage 60-100V, hydrogen flowing quantity 0-8L/min, spray away from 80-500mm.
Wire-feeding rate is adjustable, is on the one hand influenceed by metal species, on the other hand needs appropriate electric current and voltage to coordinate, then auxiliary
With appropriate high-speed gas medium.The excessive and too small formation for being all unfavorable for stable metal drop beam of silk feeding quantity.
Argon gas, nitrogen and hydrogen flowing quantity needs are determined according to material category, silk feeding quantity, and stable metal is formed to ensure
Molten drop beam, and metal drop size is in controlled range.
Electric current and voltage needs are determined according to material category and silk feeding quantity, and metal drop is formed to ensure.
Spray determines the size for the metal drop beam to be formed away from 80-500mm.The fusing point according to metal, heat are also required in addition
The physical properties such as conductance it is appropriately selected spray away from.
Accelerate to cool down metal drop beam using high pressure gas beam 6.The gases at high pressure beam 6 is produced by high pressure gas generator 7,
Its speed and flow are controlled by cooling gas flowmeter 8.Gases at high pressure frontal impact cools down metal drop beam, equivalent to one time mist
Change process, on the one hand to having refined metal drop, cooling procedure is also on the other hand accelerated, cool time is shortened, so as to carry
High metal dust preparation efficiency.Have benefited from " secondary-atomizing " process, the defects of metal drop rate can further be reduced, powder
The sphericity at end can be further enhanced.
By oxygen sensor 10, oxygen content, temperature in 12 real-time detection chambers of pressure sensor 11 and temperature sensor
Degree and pressure and other parameters, and control system 18 is transferred to, control system is provided to feed back and adjust in real time according to internal database and closed
The operational factor of key component.Oxygen content directly determines the degree of purity of metal dust, for the metal easily aoxidized,
Need strictly to control oxygen content to obtain high quality powder.Pressure sensor reflects metal drop beam and cooling gas from side
The pressure of the pressure in structure after beam head-on crash, the pressure of metal drop beam and positive cooling gas beam need to oppress mutual
Match somebody with somebody, can just prepare the metal dust of high quality.When either party hypertonia or it is too low when, can all allow cooling procedure uneven
It is even, so as to destroy quality stability.This pressure sensor sharp can detect whether both pressure states match unanimously.When
When occurring inconsistent, he can send signal in time, then control system can give hot spray apparatus and compression gas generator to send out
Go out instruction, and timely adjusting parameter.
There are individual metal bath and gas vent 9 in cavity bottom, entered with the metal drop of compressed gas by exporting
First level filtering device 13 and powder collect device 14, while are cooled down, completed cooling procedure, meet target size section
Powder can be collected in collect device 14 in.
It is remaining to pass through secondary filter 15 and two level powder catcher 16 into metal drop and compressed gas, it is complete
Into cooling procedure, during the powder that meets target size can be collected in 16, remaining part enters terminal collector 17.
Sieves in above-mentioned first level filtering device and powder catcher, and two-stage filter and powder catcher
Sub- size can be adjustable according to target size, so as to accomplish that the beam system of target size powder is standby and collects, reaches flexible preparation
Purpose.
Advantages of the present invention and beneficial effect：
1. the inventive method produces molten drop beam using hot spray apparatus, solves prior art utilizes crucible for smelting band
The efficiency bottle neck problem come, and it is more beneficial for droplet size refinement；Cooled down simultaneously using high-speed gas, solve existing slow cooling skill
The efficiency of art, more than 2 times of improved efficiency, while also refined powder size.
Brief description of the drawings：
Accompanying drawing 1：Schematic device
1 thermal spraying generating means；2 raw material thread rods；3 flow of the compressed gas gauge；4 compressed gas；5 thermal spray metal molten drops；6
Cooling gas；7 gas generators；8 cooling gas flowmeters；9 metals melt and gas vent；10 oxygen sensors；11 pressure pass
Sensor；12 temperature sensors；13 first level filtering devices；14 one-level powder collect device；15 secondary filters；16 two level powder are collected
Device；17 terminal collectors；Eighteen data control system.
Embodiment
Technical scheme is further described below in conjunction with preferred embodiment.
Embodiment 1：
Metallic aluminium is prepared, device is as shown in Figure 1.Raw material is the diameter 4.0mm metal aluminum steels of as cast condition.
The wire-feeding rate 15g/min of thermal spraying generating means, argon flow amount 150L/min, nitrogen flow 12L/min, electric current
350A, voltage 65V, sprays away from 120mm.Cooling gas is compressed argon, speed 300m/s.Cool down beam size and metal drop beam
Size is suitable.
The size of one-level cooling sieve is 60-120 microns；The screen size of secondary filter is 20-60 microns；
Embodiment 2：
Metallic copper is prepared, device is as shown in Figure 1.Raw material is the thread copper cash of diameter 3.6mm of as cast condition.
The wire-feeding rate 16g/min of thermal spraying generating means, argon flow amount 180L/min, nitrogen flow 14L/min, electric current
420A, voltage 72V, sprays away from 180mm.Cooling gas is compressed argon, speed 250m/s.Cool down beam size and metal drop beam
Size is suitable.
The size of one-level cooling sieve is 80-160 microns；The screen size of secondary filter is 30-80 microns；
Embodiment 3：
Metal signal bronze is prepared, device is as shown in Figure 1.Raw material is as cast condition diameter 5.0mm copper and tin lines.
The wire-feeding rate 15g/min of thermal spraying generating means, argon flow amount 150L/min, nitrogen flow 12L/min, electric current
350A, voltage 650V, sprays away from 80-500mm.Cooling gas is compressed argon, speed 300m/s.Cooling beam size melts with metal
It is suitable to drip beam size.
The size of one-level cooling sieve is 60-120 microns；The screen size of secondary filter is 20-60 microns；
It is provided by the invention that metal drop beam, compression are produced based on thermal spraying generating means by above-described embodiment
The cosmetics technique of gas beam front cooling, eliminates crucible for smelting of the prior art, while continuous production is realized, significantly
Improve production efficiency；Simultaneously by means of the secondary thinning process of compressed gas, powder size is reduced, and it is true to improve powder
The indexs such as circularity, efficiency more than 50% is improved than prior art.
Embodiment described above only expresses the embodiment of the present invention, but can not be therefore understands that for the present invention
The limitation of the scope of the claims.Any variation that those skilled in the art is done under the enlightenment of present inventive concept to the present invention falls
Within the scope of the present invention.
Claims (2)
1. metal powder preparation method and device based on thermal spraying, it is characterised in that：Pass through continuous conveying raw material thread rod 2, profit
Thermal spray metal molten drop 5 is formed with thermal spraying generating means 1, wire feed rate and thermal spraying generator parameter are by compression gas flow
Meter 3, compressed gas 4, and control system 18 control；In its front using high speed caused by reverse high pressure gas generator 7
Gas beam 6 is cooled down and is atomized to thermal spray metal molten drop, and its speed and flow are controlled by cooling gas flowmeter 8；Pass through
The ginseng such as oxygen sensor 10, oxygen content, temperature and pressure in 12 real-time detection chambers of pressure sensor 11 and temperature sensor
Number, and control system 18 is transferred to, control system provides the fortune fed back and adjust key componentses in real time according to internal database
Row parameter；There are individual metal bath and gas vent 9 in cavity bottom, enter one by outlet with the metal drop of compressed gas
Level filter 13 and powder collect device 14, while are cooled down, and collection can be collected in by meeting the powder in target size section
In device 14；Remaining to enter secondary filter 15 and two level powder catcher 16, meeting the powder of target size can be collected in
In 16, remaining part enters terminal collector 17；Filtering screen size wherein in filter and powder catcher can foundation
Target size is adjustable.
2. inexpensive metal powder preparation method according to claim 1 and device, it is characterised in that：Thermal spraying fills
The wire-feeding rate 10-25g/min put, argon flow amount 12-20L/min, nitrogen flow 10-15L/min, electric current 300-600A, voltage
60-100V, hydrogen flowing quantity 0-8L/min, sprays away from 80-500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710537290.7A CN107570714A (en) | 2017-07-04 | 2017-07-04 | Metal powder preparation method and device based on thermal spraying |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710537290.7A CN107570714A (en) | 2017-07-04 | 2017-07-04 | Metal powder preparation method and device based on thermal spraying |
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| Publication Number | Publication Date |
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| CN107570714A true CN107570714A (en) | 2018-01-12 |
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| CN201710537290.7A Pending CN107570714A (en) | 2017-07-04 | 2017-07-04 | Metal powder preparation method and device based on thermal spraying |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266585A (en) * | 2020-03-02 | 2020-06-12 | 合肥尚德新材料有限公司 | Method for preparing liquid-phase-immiscible metal composite material |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6398125B1 (en) * | 2001-02-10 | 2002-06-04 | Nanotek Instruments, Inc. | Process and apparatus for the production of nanometer-sized powders |
| CN1612781A (en) * | 2002-02-13 | 2005-05-04 | 梅普拉金属粉有限公司 | Method for producing particle-shaped material |
| CN103978214A (en) * | 2014-05-09 | 2014-08-13 | 西安交通大学 | Molding device of gas-atomizing metal droplets and molding method thereof |
| CN104475744A (en) * | 2014-11-25 | 2015-04-01 | 北京康普锡威科技有限公司 | Device and method for preparing spherical titanium powder and titanium alloy powder through gas atomization |
| CN104726817A (en) * | 2015-03-02 | 2015-06-24 | 安徽工业大学 | Directional ultrahigh-velocity spraying method and device based on laser induced shock wave technology |
| CN105618771A (en) * | 2016-01-29 | 2016-06-01 | 苏州英纳特纳米科技有限公司 | Radio frequency plasma preparation method and device for micro spherical titanium powder |
| CN205869472U (en) * | 2016-01-13 | 2017-01-11 | 朱明生 | Device of many heavy current electric arc atomizing preparation ball -type attritive powders |
| CN106378460A (en) * | 2016-09-22 | 2017-02-08 | 成都优材科技有限公司 | Plasma atomization method and apparatus for preparing pure titanium or titanium alloy powder |
-
2017
- 2017-07-04 CN CN201710537290.7A patent/CN107570714A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6398125B1 (en) * | 2001-02-10 | 2002-06-04 | Nanotek Instruments, Inc. | Process and apparatus for the production of nanometer-sized powders |
| CN1612781A (en) * | 2002-02-13 | 2005-05-04 | 梅普拉金属粉有限公司 | Method for producing particle-shaped material |
| CN103978214A (en) * | 2014-05-09 | 2014-08-13 | 西安交通大学 | Molding device of gas-atomizing metal droplets and molding method thereof |
| CN104475744A (en) * | 2014-11-25 | 2015-04-01 | 北京康普锡威科技有限公司 | Device and method for preparing spherical titanium powder and titanium alloy powder through gas atomization |
| CN104726817A (en) * | 2015-03-02 | 2015-06-24 | 安徽工业大学 | Directional ultrahigh-velocity spraying method and device based on laser induced shock wave technology |
| CN205869472U (en) * | 2016-01-13 | 2017-01-11 | 朱明生 | Device of many heavy current electric arc atomizing preparation ball -type attritive powders |
| CN105618771A (en) * | 2016-01-29 | 2016-06-01 | 苏州英纳特纳米科技有限公司 | Radio frequency plasma preparation method and device for micro spherical titanium powder |
| CN106378460A (en) * | 2016-09-22 | 2017-02-08 | 成都优材科技有限公司 | Plasma atomization method and apparatus for preparing pure titanium or titanium alloy powder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266585A (en) * | 2020-03-02 | 2020-06-12 | 合肥尚德新材料有限公司 | Method for preparing liquid-phase-immiscible metal composite material |
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Application publication date: 20180112 |