CN107876786A - A kind of method of oxidization of metal powder in reduction water atomization pulverization - Google Patents
A kind of method of oxidization of metal powder in reduction water atomization pulverization Download PDFInfo
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- CN107876786A CN107876786A CN201711017875.2A CN201711017875A CN107876786A CN 107876786 A CN107876786 A CN 107876786A CN 201711017875 A CN201711017875 A CN 201711017875A CN 107876786 A CN107876786 A CN 107876786A
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- metal
- tundish
- powder
- water
- high pressure
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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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- 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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0824—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with a specific atomising fluid
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a kind of method for reducing oxidization of metal powder in water atomization pulverization, by the way that raw material metal, siliceous inorganic fibre are put into smelting furnace together, smelting furnace synchronously vacuumizes with tundish, it is re-filled with inert gas, then melting, add ultrasonic activation in fusion process, the molten metal of melting is put into tundish, and the outflow aperture of default tundish bottom is 3 6mm, then metal liquid stream is impacted together with gases at high pressure using water under high pressure, molten metal is hit and crushes and metal dust is made.Invention enhances the fragmentation of water under high pressure, so as to get powder size it is more tiny（About 10 15 μm）, and water and the direct haptoreaction of molten metal are effectively prevent, reduce the oxygen content of powder（Below 1800ppm）, the quality of powder is substantially increased, has widened the application of powder.
Description
Technical field
The present invention relates to a kind of method for reducing oxidization of metal powder in water atomization pulverization, belong to field of powder metallurgy.
Background technology
Atomization is a kind of common method for preparing metal dust, and this method smashes metal or conjunction using water or inert gas
Golden melt and be made powder, wherein using water be atomized be referred to as water atomization, water atomization be using water as atomizing medium, due to
The heat capacity ratio of water is more much bigger than gas, strong to the cooling capacity of molten drop, so the metal powder granulates shape that water atomization is produced
Shape is irregular, has good compressibility and mouldability.But because water atomization tundish is under atmospheric environment, easily make
Metal or alloy melt is aoxidized by air, and the oxide of generation enters metal dust in water atomization pulverization, directly affects
The smoothness of powder particle surface, oxygen content is higher, the mobility of metal dust is poorer, the product of preparation hole after sintering
Gap can increase, and influence properties of product.
CN2013100875901 disclose it is a kind of reduce water atomization metal powder preparation during oxygen content device and side
Method, after controlling controllable temperature rod to close water atomization tundish delivery port, deoxidation treatment is carried out using double deoxidizer, taken off
Oxide caused by oxygen is covered in metal or alloy bath surface in the form of slag, plays a part of physics oxygen barrier, so as to reduce
The oxygen content of metal or alloy melt.
CN2014102314431 discloses a kind of method for reducing and suppressing oxidization of metal powder in water atomization pulverization, leads to
Cross to crush metal bath strike using water under high pressure and metal dust be made, contain a small amount of organic matter in water under high pressure, organic matter and
Molten reactant metal produces the reducibility gas such as carbon monoxide, methane, it is suppressed that the formation of metal oxide, considerably reduces
The oxygen content of metal dust.
CN201510735411X discloses a kind of atomization method and equipment for preparing ultra-fine subsphaeroidal hypoxemia metal dust,
This method is broken into drop including the metal liquid stream of melting is first passed through into gases at high pressure, and drop passes through the multiple crushing-type of water under high pressure again
Into smaller drop, and it is shrunk to subsphaeroidal during being flown in atomizing cup, finally solidifies out into superfine spherical hypoxemia
Metal dust.Because whole atomization process is carried out in inert protective gas, the oxygen content of powder is effectively reduced.
The content of the invention
To overcome above-mentioned problems of the prior art, it is an object of the invention to provide reduce metal in water atomization pulverization
The method of Powder Oxidation, effectively reduces oxygen content.
To achieve the above object, one of the technical solution adopted by the present invention is：One kind reduces metal powder in water atomization pulverization
The method of end oxidation, it is characterised in that comprise the following steps：
S1, raw material metal, siliceous inorganic fibre be put into smelting furnace together, then smelting furnace is synchronously taken out with tundish
Vacuum, inert gas is re-filled with, then melting, smelting temperature is 1600-1650 DEG C, and adds ultrasonic wave to shake in fusion process
Dynamic, the addition of inorganic fibre is the 3-5% of raw material metal gross weight；
S2, the molten metal of melting is put into tundish, and the outflow aperture of default tundish bottom be 3-6mm, is effectively controlled
The uninterrupted of liquid, make gained powder particle evenly；
S3, metal liquid stream is impacted together with gases at high pressure using water under high pressure, molten metal is hit and crushes and metal dust is made, its
Middle atomization hydraulic pressure is 40-100Mpa, and atomization is preheated into 50-80 DEG C with water before atomization.
Silicone content is 35-55% in above-mentioned inorganic fibre, by weight.Glass fibre, quartz glass fibre can be selected
Deng.
Both above-mentioned smelting furnace and tundish are welded into integrated sealing tank, and in the position that smelting furnace is connected with tundish
Put and be provided with valve.
Above-mentioned gases at high pressure are from one or two kinds of mixing in nitrogen, argon gas.
Compared with prior art, the device have the advantages that being：Enhance the fragmentation of water under high pressure, powder size
It is more tiny（About 10-15 μm）, and by melting step, water atomization step carry out anti-oxidant treatment, effectively prevent water with
The direct haptoreaction of molten metal, reduce the oxygen content of powder（Below 1800ppm）, the quality of powder is substantially increased, is widened
The application of powder.
Embodiment
In conjunction with specific embodiment, next the present invention is described in further detail.Obviously, it is impossible to therefore limit the present invention
System is among described scope of embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making wound
The every other embodiment that the property made is obtained on the premise of working, all should belong to protection scope of the present invention.In following embodiments
The plantation of unreceipted actual conditions and management method, conventionally and condition, or selected according to catalogue.
Embodiment one
The method for reducing oxidization of metal powder in water atomization pulverization, it is characterised in that comprise the following steps：
S1, both smelting furnace and tundish are welded into integrated sealing tank, and in the position that smelting furnace is connected with tundish
It is provided with valve；
S2, raw material metal, siliceous inorganic fibre be put into smelting furnace together, wherein silicone content is in inorganic fibre
55%, valve is then opened, smelting furnace synchronously vacuumizes with tundish, is re-filled with inert gas, closes valve, then melting, melts
It is 1600-1650 DEG C to refine temperature, and adds ultrasonic activation in fusion process, and the addition of inorganic fibre is raw material metal
The 5% of gross weight；
S3, valve is opened, the molten metal of melting is put into tundish, and the outflow aperture of default tundish bottom is 3mm, is had
The uninterrupted of effect control liquid, makes gained powder particle evenly；
S4, combined using water under high pressure and gases at high pressure spray disk, together with impact metal liquid stream, molten metal is hit and crushes and gold is made
Belong to powder, wherein atomization hydraulic pressure is 100Mpa, atomization is preheated to 80 DEG C with water before atomization.Gases at high pressure select argon gas.
Metal dust granularity manufactured in the present embodiment is 10-12 μm, and oxygen content is below 1500ppm.
Embodiment two
The method for reducing oxidization of metal powder in water atomization pulverization, comprises the following steps：
S1, both smelting furnace and tundish are welded into integrated sealing tank, and in the position that smelting furnace is connected with tundish
It is provided with valve；
S2, raw material metal, siliceous inorganic fibre being put into smelting furnace together, silicone content is 35% in inorganic fibre,
By weight, valve is then opened, smelting furnace synchronously vacuumizes with tundish, is re-filled with inert gas, closes valve, Ran Hourong
Refining, smelting temperature is 1600-1650 DEG C, and adds ultrasonic activation in fusion process, and the addition of inorganic fibre is metal
The 3% of raw material gross weight；
S3, valve is opened, the molten metal of melting is put into tundish, and the outflow aperture of default tundish bottom is 6mm, is had
The uninterrupted of effect control liquid, makes gained powder particle evenly；
S4, combined using water under high pressure and gases at high pressure spray disk, together with impact metal liquid stream, molten metal is hit and crushes and gold is made
Belong to powder, wherein atomization hydraulic pressure is 50Mpa, atomization is preheated to 50 DEG C with water before atomization.Gases at high pressure are from nitrogen, argon gas two
Kind mixes in any proportion.
Metal dust granularity manufactured in the present embodiment is 12-15 μm, and oxygen content is below 1800ppm.
In the present invention, the concrete structure of smelting furnace and the concrete structure of tundish are compared with conventional structure in technology, this hair
It is bright that simply tundish is welded at the liquid outlet of smelting furnace, and valve is installed by ring flange in exit, it is easy to together take out
Vacuum, it is filled with.
Claims (4)
- A kind of 1. method for reducing oxidization of metal powder in water atomization pulverization, it is characterised in that comprise the following steps：S1, raw material metal, siliceous inorganic fibre be put into smelting furnace together, then smelting furnace is synchronously taken out with tundish Vacuum, inert gas is re-filled with, then melting, smelting temperature is 1600-1650 DEG C, and adds ultrasonic wave to shake in fusion process Dynamic, the addition of inorganic fibre is the 3-5% of raw material metal gross weight；S2, the molten metal of melting is put into tundish, and the outflow aperture of default tundish bottom be 3-6mm, is effectively controlled The uninterrupted of liquid, make gained powder particle evenly；S3, metal liquid stream is impacted together with gases at high pressure using water under high pressure, molten metal is hit and crushes and metal dust is made, its Middle atomization hydraulic pressure is 40-100Mpa, and atomization is preheated into 50-80 DEG C with water before atomization.
- 2. the method according to claim 1 for reducing oxidization of metal powder in water atomization pulverization, it is characterised in that above-mentioned nothing Silicone content is 35-55% in machine matter fiber, by weight.
- 3. the method according to claim 2 for reducing oxidization of metal powder in water atomization pulverization, it is characterised in that above-mentioned molten Both furnace and tundish are welded into integrated sealing tank, and valve is provided with the position that smelting furnace is connected with tundish.
- 4. the method according to claim 1 or 2 for reducing oxidization of metal powder in water atomization pulverization, it is characterised in that on Gases at high pressure are stated from one or two kinds of mixing in nitrogen, argon gas.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108746648A (en) * | 2018-07-10 | 2018-11-06 | 北京中材人工晶体研究院有限公司 | A kind of equipment and technique of diamond synthesis catalytic alloy powder |
| CN109513942A (en) * | 2018-06-20 | 2019-03-26 | 安徽中体新材料科技有限公司 | A kind of nano/submicron globular metallic powder aerosolization preparation method |
| CN110695365A (en) * | 2019-11-19 | 2020-01-17 | 西北工业大学 | Method and device for preparing metal type coated powder by gas-solid two-phase atomization |
| CN111992728A (en) * | 2020-08-23 | 2020-11-27 | 苏州超弦新材料有限公司 | Preparation method of spherical metal powder for additive manufacturing |
| CN114226737A (en) * | 2021-11-25 | 2022-03-25 | 普瑞特机械制造股份有限公司 | Method for producing low-oxygen-content metal powder by using stainless steel waste |
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| CN102161098A (en) * | 2011-03-29 | 2011-08-24 | 长沙拓智金属材料科技有限责任公司 | Method for preparing low-oxygen content superfine pre-alloyed powder through ultrahigh pressure water and gas combined atomization |
| CN102272339A (en) * | 2008-12-30 | 2011-12-07 | Posco公司 | Method for producing amorphous alloy using molten iron |
| CN103128300A (en) * | 2013-03-19 | 2013-06-05 | 南京理工大学 | Device and method for reducing oxygen content in process of water atomization metal powder preparation |
| CN105268981A (en) * | 2014-05-28 | 2016-01-27 | 深圳市铂科新材料股份有限公司 | Method for minimizing and inhibiting oxidation of metal powder during powder preparation through water atomization |
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2017
- 2017-10-27 CN CN201711017875.2A patent/CN107876786A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102272339A (en) * | 2008-12-30 | 2011-12-07 | Posco公司 | Method for producing amorphous alloy using molten iron |
| CN102161098A (en) * | 2011-03-29 | 2011-08-24 | 长沙拓智金属材料科技有限责任公司 | Method for preparing low-oxygen content superfine pre-alloyed powder through ultrahigh pressure water and gas combined atomization |
| CN103128300A (en) * | 2013-03-19 | 2013-06-05 | 南京理工大学 | Device and method for reducing oxygen content in process of water atomization metal powder preparation |
| CN105268981A (en) * | 2014-05-28 | 2016-01-27 | 深圳市铂科新材料股份有限公司 | Method for minimizing and inhibiting oxidation of metal powder during powder preparation through water atomization |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109513942A (en) * | 2018-06-20 | 2019-03-26 | 安徽中体新材料科技有限公司 | A kind of nano/submicron globular metallic powder aerosolization preparation method |
| CN108746648A (en) * | 2018-07-10 | 2018-11-06 | 北京中材人工晶体研究院有限公司 | A kind of equipment and technique of diamond synthesis catalytic alloy powder |
| CN110695365A (en) * | 2019-11-19 | 2020-01-17 | 西北工业大学 | Method and device for preparing metal type coated powder by gas-solid two-phase atomization |
| CN111992728A (en) * | 2020-08-23 | 2020-11-27 | 苏州超弦新材料有限公司 | Preparation method of spherical metal powder for additive manufacturing |
| CN114226737A (en) * | 2021-11-25 | 2022-03-25 | 普瑞特机械制造股份有限公司 | Method for producing low-oxygen-content metal powder by using stainless steel waste |
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