CN104439260A - Double-nozzle atomization composite powder preparation method - Google Patents
Double-nozzle atomization composite powder preparation method Download PDFInfo
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- CN104439260A CN104439260A CN201410709670.0A CN201410709670A CN104439260A CN 104439260 A CN104439260 A CN 104439260A CN 201410709670 A CN201410709670 A CN 201410709670A CN 104439260 A CN104439260 A CN 104439260A
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Abstract
The invention relates to a double-nozzle atomization composite powder preparation method. The method includes the steps that (1) aluminum ingots and copper ingots serve as raw materials to prepare copper clad aluminum powder, and aluminum ingots and nickel ingots serve as raw materials to prepare nickel clad aluminum powder; (2) the raw materials are put into smelting furnaces to be smelted, and parameters of the smelting furnaces are adjusted; (3) atomization operation is conducted after all the smelting furnaces are connected with an atomization chamber; (4) the cooling speed and advancing distance of atomization powder are controlled, the aluminum power is sprayed out firstly, then the copper powder or the nickel powder is sprayed out, after the aluminum powder is nucleated, bombardment is conducted on the aluminum powder and half solidification liquid beads of the copper or nickel to form the coated type composite powder; (5) after cooling is conducted, the coated powder is collected, encapsulated, weighed and packaged. Compared with the prior art, the double-nozzle atomization composite powder preparation method has the advantages that the utilization rate of the raw materials is guaranteed to the maximum degree; no chemical components are added, the reaction process is simple, the whole process is safe and free of pollution, and no harmful matter is generated; the preparation mode is flexible and controllable, and both the particle size of the aluminum powder serving as kernel powder and the content of the coated shell powder can be accurately controlled.
Description
Technical field
The present invention relates to cladded type composite powder manufacturing technology field, particularly relate to a kind of manufacture method of two-nozzle atomization composite granule.
Background technology
Composite powder refers to the powder that each particle is made up of two or more heterogeneities, be divided into mixed type composite powder and cladded type composite powder, cladded type composite granule is different from traditional mixed type composite granule, it has nucleocapsid structure, be made up of central particles and clad, not homophase in cladded type composite granule can reach intergranular mixing one by one, and general composite granule does not then realize the Homogeneous phase mixing degree in particle rank.
Aluminium powder surface itself is unstable, is easy to the oxygen generation redox reaction in air, forms fine and close alumina layer, make active reduction, and the aluminium powder surface of coated copper or nickel has non-oxidizability, is widely used in different fields.But traditional coated aluminium powder method, as chemical method, not only will use chemicals, have unsafe factor, easily cause environmental pollution, and there is composite powder uneven components, the shortcoming of usability difference.
Summary of the invention
The invention provides a kind of manufacture method of two-nozzle atomization composite granule, do not add chemical composition, can ensure the utilization rate of raw material to greatest extent, and manufacture is controlled flexibly, all can realizes accurate control as the aluminum powder particle size of kernel powder and the content of encasement powder.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A manufacture method for two-nozzle atomization composite granule, comprises the steps:
1) adopt aluminium ingot and copper ingot as raw material manufactured copper coated aluminum powder, adopt aluminium ingot and nickel ingot to manufacture Al contained Ni as raw material;
2) raw material surface is cleared up, after the raw material bone dry after cleaning is good, drop into respectively in special smelting furnace and melt; Regulate and monitor each smelting furnace parameter in real time:
The pressure of aluminium ingot smelting furnace is 600-700Pa, and temperature is 500-1000 DEG C, oxygen content≤0.6%;
The pressure of copper ingot smelting furnace is 700-1000Pa, and temperature is 900-1500 DEG C, oxygen content≤0.6%;
The pressure of nickel ingot smelting furnace is 700-1200Pa, and temperature is 800-1700 DEG C, oxygen content≤0.6%;
3) regulate atomizing nozzle structure, whole process filling with inert gas, carries out nebulisation operation after each smelting furnace is connected with spray chamber;
4) by controlling cooling velocity and the travel distance of atomization powder, aluminium powder first being sprayed, then sprays copper powder or nickel powder, wherein:
The weight ratio of aluminium powder and copper powder is 20:(13-17), the weight ratio of aluminium powder and nickel powder is 100:(1-5);
The granularity of aluminium powder is 10-100um, and the copper powder of outer cladding, nickel powder granularity are 10-100um;
Copper-clad aluminium powder surface copper content 10-95%, the content 0.3-20% of Al contained Ni surface nickel;
After aluminium powder nucleation, bombard form cladded type composite granule with the state liquid pearl that partly solidifies of copper or nickel;
5) after cooling, cladding powder is collected, encapsulates, weighs, packed.
Described inert gas is liquid argon gas.
The removing surface of described raw material adopts fully-automatic sprinkling cleaning drying machine, outward appearance no-sundries.
Described spray chamber is two-nozzle atomization room.
Compared with prior art, the invention has the beneficial effects as follows:
1) adopt two-nozzle atomization method to manufacture composite granule, ensure the utilization rate of raw material to greatest extent;
2) do not add chemical composition, course of reaction is simple, and full safety is pollution-free, does not produce harmful substance;
3) manufacture is controlled flexibly, all can realize accurate control as the aluminum powder particle size of kernel powder and the content of encasement powder.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of copper cover aluminum powder in embodiment 1.
Fig. 2 is the scanning electron microscope (SEM) photograph of Al contained Ni body in embodiment 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
The manufacture method of a kind of two-nozzle atomization composite granule of the present invention, comprises the steps:
1) adopt aluminium ingot and copper ingot as raw material manufactured copper coated aluminum powder, adopt aluminium ingot and nickel ingot to manufacture Al contained Ni as raw material;
2) raw material surface is cleared up, after the raw material bone dry after cleaning is good, drop into respectively in special smelting furnace and melt; Regulate and monitor each smelting furnace parameter in real time:
The pressure of aluminium ingot smelting furnace is 600-700Pa, and temperature is 500-1000 DEG C, oxygen content≤0.6%;
The pressure of copper ingot smelting furnace is 700-1000Pa, and temperature is 900-1500 DEG C, oxygen content≤0.6%;
The pressure of nickel ingot smelting furnace is 700-1200Pa, and temperature is 800-1700 DEG C, oxygen content≤0.6%;
3) regulate atomizing nozzle structure, whole process filling with inert gas, carries out nebulisation operation after each smelting furnace is connected with spray chamber;
4) by controlling cooling velocity and the travel distance of atomization powder, aluminium powder first being sprayed, then sprays copper powder or nickel powder, wherein:
The weight ratio of aluminium powder and copper powder is 20:(13-17), the weight ratio of aluminium powder and nickel powder is 100:(1-5);
The granularity of aluminium powder is 10-100um, and the copper powder of outer cladding, nickel powder granularity are 10-100um;
Copper-clad aluminium powder surface copper content 10-95%, the content 0.3-20% of Al contained Ni surface nickel;
After aluminium powder nucleation, bombard form cladded type composite granule with the state liquid pearl that partly solidifies of copper or nickel;
5) after cooling, cladding powder is collected, encapsulates, weighs, packed.
Described inert gas is liquid argon gas.
The removing surface of described raw material adopts fully-automatic sprinkling cleaning drying machine, outward appearance no-sundries.
Described spray chamber is two-nozzle atomization room.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention are not limited to following embodiment.In following embodiment, method therefor is conventional method if no special instructions.
[embodiment 1]
Adopt aluminium ingot and copper ingot as raw material manufactured copper coated aluminum powder:
Raw material surface is cleared up, after clearing up the aluminium ingot well and copper ingot bone dry, drops in aluminium ingot smelting furnace and copper ingot smelting furnace respectively and melt; Regulate and monitor each smelting furnace parameter in real time:
The pressure of aluminium ingot smelting furnace is 600-700Pa, and temperature is 800 DEG C, oxygen content≤0.6%;
The pressure of copper ingot smelting furnace is 800-900Pa, and temperature is 1000 DEG C, oxygen content≤0.6%;
Regulate atomizing nozzle structure, whole process filling with inert gas, carries out nebulisation operation after aluminium ingot smelting furnace is connected with spray chamber respectively with copper ingot smelting furnace;
The cooling velocity controlling atomization powder is 0.93 DEG C/S, and travel distance 30m, makes aluminium powder first spray, then spray copper powder;
The weight ratio of aluminium powder and copper powder is 20:15:
The granularity of aluminium powder is 25um, and the copper powder particle size of outer cladding is 20um;
Copper-clad aluminium powder surface copper content 85%;
After cooling, cladding powder is collected, encapsulates, weighs, packed.
As shown in Figure 1, be the scanning electron microscope (SEM) photograph of the present embodiment finished product copper cover aluminum powder.
[embodiment 2]
Aluminium ingot and nickel ingot is adopted to manufacture Al contained Ni as raw material:
Raw material surface is cleared up, after clearing up the aluminium ingot well and nickel ingot bone dry, drops in aluminium ingot smelting furnace and nickel ingot smelting furnace respectively and melt; Regulate and monitor each smelting furnace parameter in real time:
The pressure of aluminium ingot smelting furnace is 600-700Pa, and temperature is 1000 DEG C, oxygen content≤0.6%;
The pressure of nickel ingot smelting furnace is 1000-1200Pa, and temperature is 1200 DEG C, oxygen content≤0.6%;
Regulate atomizing nozzle structure, whole process filling with inert gas, aluminium ingot smelting furnace carries out nebulisation operation after being connected with spray chamber respectively with nickel ingot smelting furnace;
The cooling velocity controlling atomization powder is 0.75 DEG C/S, and travel distance 40m, makes aluminium powder first spray, then spray nickel powder;
The weight ratio of aluminium powder and nickel powder is 100:3;
The granularity of aluminium powder is 25um, and the nickel powder granularity of outer cladding is 30um;
Al contained Ni surface nickel content 5%;
After cooling, cladding powder is collected, encapsulates, weighs, packed.
As shown in Figure 2, be the scanning electron microscope (SEM) photograph of the present embodiment finished product Al contained Ni body.
Claims (4)
1. a manufacture method for two-nozzle atomization composite granule, is characterized in that, comprises the steps:
1) adopt aluminium ingot and copper ingot as raw material manufactured copper coated aluminum powder, adopt aluminium ingot and nickel ingot to manufacture Al contained Ni as raw material;
2) raw material surface is cleared up, after the raw material bone dry after cleaning is good, drop into respectively in special smelting furnace and melt; Regulate and monitor each smelting furnace parameter in real time:
The pressure of aluminium ingot smelting furnace is 600-700Pa, and temperature is 500-1000 DEG C, oxygen content≤0.6%;
The pressure of copper ingot smelting furnace is 700-1000Pa, and temperature is 900-1500 DEG C, oxygen content≤0.6%;
The pressure of nickel ingot smelting furnace is 700-1200Pa, and temperature is 800-1700 DEG C, oxygen content≤0.6%;
3) regulate atomizing nozzle structure, whole process filling with inert gas, carries out nebulisation operation after each smelting furnace is connected with spray chamber;
4) by controlling cooling velocity and the travel distance of atomization powder, aluminium powder first being sprayed, then sprays copper powder or nickel powder, wherein:
The weight ratio of aluminium powder and copper powder is 20:(13-17), the weight ratio of aluminium powder and nickel powder is 100:(1-5);
The granularity of aluminium powder is 10-100um, and the copper powder of outer cladding, nickel powder granularity are 10-100um;
Copper-clad aluminium powder surface copper content 10-95%, the content 0.3-20% of Al contained Ni surface nickel;
After aluminium powder nucleation, bombard form cladded type composite granule with the state liquid pearl that partly solidifies of copper or nickel;
5) after cooling, cladding powder is collected, encapsulates, weighs, packed.
2. the manufacture method of a kind of two-nozzle atomization composite granule according to claim 1, is characterized in that, described inert gas is liquid argon gas.
3. the manufacture method of a kind of two-nozzle atomization composite granule according to claim 1, is characterized in that, the removing surface of described raw material adopts fully-automatic sprinkling cleaning drying machine, outward appearance no-sundries.
4. the manufacture method of a kind of two-nozzle atomization composite granule according to claim 1, is characterized in that, described spray chamber is two-nozzle atomization room.
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| CN106000227A (en) * | 2016-07-13 | 2016-10-12 | 张启辉 | System for preparing powder with gas phase and liquid phase |
| CN106862552A (en) * | 2017-03-13 | 2017-06-20 | 河南省远洋粉体科技股份有限公司 | Spherical super fine aluminium powder surface modifying method and its modified device |
| CN112935268A (en) * | 2021-02-23 | 2021-06-11 | 江苏威拉里新材料科技有限公司 | Preparation process of 3D printing metal powder |
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| CN103722170A (en) * | 2014-01-01 | 2014-04-16 | 北京矿冶研究总院 | Agglomerated copper-aluminum-nickel graphite sealing composite powder material and preparation method thereof |
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| EP2514542A1 (en) * | 2009-12-15 | 2012-10-24 | Korea Institute Of Machinery & Materials | Production method and production device for a composite metal powder using the gas spraying method |
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| CN106000227A (en) * | 2016-07-13 | 2016-10-12 | 张启辉 | System for preparing powder with gas phase and liquid phase |
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| CN106862552A (en) * | 2017-03-13 | 2017-06-20 | 河南省远洋粉体科技股份有限公司 | Spherical super fine aluminium powder surface modifying method and its modified device |
| CN112935268A (en) * | 2021-02-23 | 2021-06-11 | 江苏威拉里新材料科技有限公司 | Preparation process of 3D printing metal powder |
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| CN104439260B (en) | 2016-06-29 |
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