CN106346013A - Preparation method of aluminum magnesium alloy powder for automobile engine - Google Patents
Preparation method of aluminum magnesium alloy powder for automobile engine Download PDFInfo
- Publication number
- CN106346013A CN106346013A CN201610867774.3A CN201610867774A CN106346013A CN 106346013 A CN106346013 A CN 106346013A CN 201610867774 A CN201610867774 A CN 201610867774A CN 106346013 A CN106346013 A CN 106346013A
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- China
- Prior art keywords
- alloy
- powder
- preparation
- automobile engine
- alloy powder
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Classifications
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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
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
Abstract
The invention relates to a preparation method of aluminum magnesium alloy powder for an automobile engine. The preparation method comprises the steps that aluminum particles are put in a heating furnace and are dissolved, then magnesium particles, cobalt particles and tin particles are added for smelting, dross is thoroughly taken out to obtain alloy liquid after dissolved clarification; the alloy liquid is cast into a mold, the alloy liquid and the mold are rapidly put in cold water, cooling is performed to reach room temperature, and alloy ingots are obtained; then, the alloy ingots are turned into fines, and smashing is performed to obtain alloy powder; the alloy powder and the liquid are mixed, and an organic binder is added, and even stirring is performed to prepare metal powder slurry; then the slurry is made into spherical metal powder through a mist spraying pelletizer. The alloy liquid can be rapidly cooled by throwing out the alloy liquid through a rotating red copper wheel, it is ensured that the metal staying time at a high-temperature stage is shorter, alloy elements are too late to diffuse, accordingly tissues are refined, segregation is reduced, and then higher-strength metal powder can be prepared through the mist spraying pelletizer.
Description
Technical field
The present invention relates to the preparation method of automobile engine al-mg alloy powder.
Background technology
Aluminium alloy with magnesium as main alloy element has light weight, the anti-corrosion good, feature of easy-formation, moderate strength, extensively
General be applied to the vehicles manufacture such as Automobile Plate, oil truck, coal conveyor, ship, with aluminium alloy manufacture the vehicles can substantially subtract
Light dead-weight, raising carrying capacity, minimizing energy resource consumption, are used for automobile engine and change speed gear box at present.With social development,
People require the vehicles to possess higher serviceability and reliability, and this is to the mechanical property of some part materials, molding
The combination properties such as performance, heat stability it is also proposed higher requirement.It is desirable to material taking the engine aluminum alloy of automobile as a example
Performance meets tensile strength in 280～350mpa, yield strength σ 0.2 >=125 mpa, percentage elongation δ >=26%, with
When material spray painting baking after intensity be not decreased obviously.This requires that material preserves very high prolonging in the case of higher-strength
Stretch rate, to improve the processability of material, require material to have very high heat resistance simultaneously, so that the traffic work prepared
There is higher security performance.
Content of the invention
For above-mentioned technical problem, the present invention provides one kind can prepare intensity height, extensibility preferable automobile engine use
The preparation method of al-mg alloy powder.
The technical solution used in the present invention is: the preparation method of automobile engine al-mg alloy powder, and it includes following
Step:
(1) aluminum shot is placed in heating furnace, after aluminum shot dissolving, adds magnesium grain, cobalt button and stannum grain to carry out melting, after molten clear after drag for net
Scum silica frost, obtains aluminium alloy；
(2) aluminium alloy is poured in mould, is subsequently placed in cold water and is cooled to room temperature, obtain alloy pig；
(3) alloy pig is lathed after fines and is pulverized, obtain alloyed powder；
(4) by alloyed powder and liquid mixing, and add organic bond to stir, be configured to metal powder slurry；
(5) again slurry is made metal dust by sponging granulator.
Preferably, the content of magnesium is 5-12wt% in described stannum grain, magnesium grain, cobalt button and aluminum shot, the content of stannum is 12
Wt %, cobalt content is 1-2%, balance of aluminum.
Preferably, described liquid adopts distilled water or deionized water, and alloyed powder is (2.5 with the mass ratio of liquid
3): 1.
Preferably, described organic bond adopts metal granulating agent, its addition is the 2 4% of alloyed powder quality.
Preferably, described sponging granulator adopts centrifugal spraying granulator or press atomization comminutor.
Preferably, the rotating speed of described centrifugal spraying granulator is 5,000 8000 revs/min, the pressure of press atomization comminutor
Power is 15 25kg/ cm2.
Preferably, the inlet temperature of described sponging granulator dry air be 250 350 DEG C, outlet temperature be 100
150℃；The flow of dry air is 100 200 nm3/h；Charging rate is 10 20 kg/h.
As can be known from the above technical solutions, aluminium alloy is thrown away by the present invention by the red copper wheel of rotation, and aluminium alloy can be made quick
It is ensured that metal is shorter in the hot stage time of staying, alloying element has little time to spread for cooling, thus thinning microstructure, reduces segregation,
Can prepare that front intensity is higher, the preferable powder of elongation percentage again by sponging granulator..
Specific embodiment
The present invention is described more detail below, the illustrative examples of the here present invention and explanation are used for explaining the present invention,
But it is not as a limitation of the invention.
The preparation method of automobile engine al-mg alloy powder, it comprises the following steps:
With aluminum, magnesium, stannum, cobalt button as raw material, and by magnesium content be 5-12wt%, stannum, cobalt content be 12 wt %, surplus
Carry out dispensing for aluminum；Then aluminum shot is placed in induction heater, after aluminum shot dissolving, adds magnesium grain, cobalt button and stannum grain to be melted
Refining, after molten clear after drag for net scum silica frost, obtain aluminium alloy；Aluminium alloy is poured in mould, is immediately placed in together with mould cold in cold water
But to room temperature, obtain alloy pig；Then alloy pig is lathed after fines and is pulverized, obtain alloyed powder；Then by alloyed powder
With liquid mixing, and add metal granulating agent to stir, be configured to metal powder slurry；Again slurry is passed through centrifugal spray granulation
Metal dust prepared by machine or press atomization comminutor.
Embodiment 1
92wt % aluminum shot is placed in induction heater, after aluminum shot dissolving, adds 2wt % stannum grain, 1wt% cobalt button and 5wt% magnesium grain to enter
Row melting, after molten clear after drag for net scum silica frost, obtain aluminium alloy；Aluminium alloy is poured in mould, is immediately placed in cold water together with mould
In be cooled to room temperature, obtain alloy pig；Then alloy pig is lathed after fines and is pulverized, obtain alloyed powder；Then will close
Bronze is mixed with distilled water, and alloyed powder is 2.5:1 with the mass ratio of distilled water, and adds 2% metal pelletize of alloyed powder quality
Agent stirs, and is configured to metal powder slurry；Again slurry is carried out pelletize, wherein sponging granulator by centrifugal spraying granulator
The inlet temperature of dry air is 250 DEG C, outlet temperature is 100 DEG C, the flow of dry air is 100 nm3/ h, charging rate
For 10kg/h, the rotating speed of centrifugal spraying granulator is 5,000 8000 revs/min, thus obtaining al-mg alloy powder；This alloyed powder
The last tensile strength being used for during automotive engine component is up to 355mpa, yield strength reaches 147mpa, percentage elongation reaches 26.2%.
Embodiment 2
87.5wt % aluminum shot is placed in induction heater, after aluminum shot dissolving, adds 1.5wt % stannum grain, 2wt% cobalt button and 10wt%
Magnesium grain carries out melting, after molten clear after drag for net scum silica frost, obtain aluminium alloy；Aluminium alloy is poured in mould, puts rapidly together with mould
It is cooled to room temperature in cold water, obtain alloy pig；Then alloy pig is lathed after fines and is pulverized, obtain alloyed powder；Connect
And alloyed powder is mixed with deionized water, and alloyed powder is 2.8:1 with the mass ratio of deionized water, and add alloyed powder quality
3% metal granulating agent stirs, and is configured to metal powder slurry；Again slurry is carried out pelletize by press atomization comminutor, wherein
The inlet temperature of sponging granulator dry air is 300 DEG C, outlet temperature is 130 DEG C, the flow of dry air is 150 nm3/
H, charging rate are 15 kg/h, and the pressure of press atomization comminutor is 25kg/ cm2, thus obtaining al-mg alloy powder；This conjunction
The last tensile strength being used for during automotive engine component of bronze is up to 368mpa, yield strength reaches 170mpa, percentage elongation reaches
27.4%.
Embodiment 3
85.5wt % aluminum shot is placed in induction heater, after aluminum shot dissolving, adds 1wt % stannum grain, 1.5wt% cobalt button and 12wt%
Magnesium grain carries out melting, after molten clear after drag for net scum silica frost, obtain aluminium alloy；Aluminium alloy is poured in mould, puts rapidly together with mould
It is cooled to room temperature in cold water, obtain alloy pig；Then alloy pig is lathed after fines and is pulverized, obtain alloyed powder；Connect
And alloyed powder is mixed with deionized water, and alloyed powder is 3:1 with the mass ratio of deionized water, and add the 4% of alloyed powder quality
Metal granulating agent stirs, and is configured to metal powder slurry；Again slurry is carried out pelletize by press atomization comminutor, wherein spray
The inlet temperature of mist comminutor dry air is 350 DEG C, outlet temperature is 150 DEG C, the flow of dry air is 200 nm3/h、
Charging rate is 20 kg/h, and the pressure of press atomization comminutor is 15kg/ cm2, thus obtaining al-mg alloy powder；This alloy
Powder be used for automotive engine component when tensile strength up to 352mpa, yield strength reaches 142mpa, percentage elongation reaches
26.1%.
The technical scheme above embodiment of the present invention being provided is described in detail, specific case used herein
The principle and embodiment of the embodiment of the present invention is set forth, the explanation of above example is only applicable to help understand this
The principle of inventive embodiments；Simultaneously for one of ordinary skill in the art, according to the embodiment of the present invention, in specific embodiment party
All will change in formula and range of application, in sum, this specification content should not be construed as limitation of the present invention.
Claims (7)
1. the preparation method of automobile engine al-mg alloy powder, it comprises the following steps:
(1) aluminum shot is placed in heating furnace, after aluminum shot dissolving, adds magnesium grain, stannum grain and cobalt button to carry out melting, after molten clear after drag for net
Scum silica frost, obtains aluminium alloy；
(2) aluminium alloy is poured in mould, is subsequently placed in cold water and is cooled to room temperature, obtain alloy pig；
(3) alloy pig is lathed after fines and is pulverized, obtain alloyed powder；
(4) by alloyed powder and liquid mixing, and add organic bond to stir, be configured to metal powder slurry；
(5) again slurry is made metal dust by sponging granulator.
2. according to claim 1 automobile engine al-mg alloy powder preparation method it is characterised in that: described aluminum
In grain, magnesium grain, cobalt button and stannum grain, the content of magnesium is 5-12wt%, and the content of stannum is 12 wt %, and cobalt accounts for 1-2%, balance of aluminum.
3. automobile engine al-mg alloy powder as claimed in claim 1 preparation method it is characterised in that: described liquid is adopted
With distilled water or deionized water, and alloyed powder is (2.5 3) with the mass ratio of liquid: 1.
4. automobile engine al-mg alloy powder as claimed in claim 1 preparation method it is characterised in that: described organic viscous
Mixture adopts metal granulating agent, and its addition is the 2 4% of alloyed powder quality.
5. automobile engine al-mg alloy powder as claimed in claim 1 preparation method it is characterised in that: described spraying is made
Grain machine adopts centrifugal spraying granulator or press atomization comminutor.
6. automobile engine al-mg alloy powder as claimed in claim 5 preparation method it is characterised in that: described centrifugation spray
The rotating speed of mist comminutor is 5,000 8000 revs/min, and the pressure of press atomization comminutor is 15 25kg/ cm2.
7. automobile engine al-mg alloy powder as claimed in claim 5 preparation method it is characterised in that: described spraying is made
The inlet temperature of grain machine dry air is 250 350 DEG C, outlet temperature is 100 150 DEG C；The flow of dry air is 100
200 nm3/h；Charging rate is 10 20 kg/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867774.3A CN106346013A (en) | 2016-09-30 | 2016-09-30 | Preparation method of aluminum magnesium alloy powder for automobile engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867774.3A CN106346013A (en) | 2016-09-30 | 2016-09-30 | Preparation method of aluminum magnesium alloy powder for automobile engine |
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| CN106346013A true CN106346013A (en) | 2017-01-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410202A (en) * | 2001-09-21 | 2003-04-16 | 吴庆林 | Preparation method of spherical aluminium zinc alloy powder and its product |
| KR20090121967A (en) * | 2008-05-23 | 2009-11-26 | 부산대학교 산학협력단 | Metal nano composite material manufacture method using for turbulent in-situ melting mixing process |
| WO2011020462A1 (en) * | 2009-08-18 | 2011-02-24 | Mtu Aero Engines Gmbh | Thin-walled structural component, and method for the production thereof |
| CN103785860A (en) * | 2014-01-22 | 2014-05-14 | 宁波广博纳米新材料股份有限公司 | Metal powder for 3D printer and preparing method thereof |
-
2016
- 2016-09-30 CN CN201610867774.3A patent/CN106346013A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410202A (en) * | 2001-09-21 | 2003-04-16 | 吴庆林 | Preparation method of spherical aluminium zinc alloy powder and its product |
| KR20090121967A (en) * | 2008-05-23 | 2009-11-26 | 부산대학교 산학협력단 | Metal nano composite material manufacture method using for turbulent in-situ melting mixing process |
| WO2011020462A1 (en) * | 2009-08-18 | 2011-02-24 | Mtu Aero Engines Gmbh | Thin-walled structural component, and method for the production thereof |
| CN103785860A (en) * | 2014-01-22 | 2014-05-14 | 宁波广博纳米新材料股份有限公司 | Metal powder for 3D printer and preparing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 吴树森等: "《铝、镁合金熔炼与成形加工技术》", 31 March 2012, 机械工业出版社 * |
| 韩芳: "粉末冶金法制备高强度Cu-Ni-Sn合金的工艺及性能研究", 《中国优秀硕士学位论文全文数据库（工程科技Ⅰ辑）》 * |
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Application publication date: 20170125 |
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