CN101733622A - Method for producing high-temperature resistant high-strength high-modulus aluminium matrix composite - Google Patents
Method for producing high-temperature resistant high-strength high-modulus aluminium matrix composite Download PDFInfo
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- CN101733622A CN101733622A CN200810235979A CN200810235979A CN101733622A CN 101733622 A CN101733622 A CN 101733622A CN 200810235979 A CN200810235979 A CN 200810235979A CN 200810235979 A CN200810235979 A CN 200810235979A CN 101733622 A CN101733622 A CN 101733622A
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Abstract
The invention provides a method for producing high-temperature resistant high-strength high-modulus aluminium matrix composite, comprising the following steps: adding a pure industrial aluminum ingot to a crucible, heating the crucible to melt the pure aluminum ingot, adding an Mg ingot to the melted pure aluminum ingot, crashing the residues, refining the melted pure aluminum ingot, removing gases in the melted pure aluminum ingot, covering the melted pure aluminum ingot with covering agent, adjusting the temperature of the melted pure aluminum ingot, stirring the melted pure aluminum ingot, adding the mixed salt of K2TiF6, KBF4, KAlF6 and MgF2 which are dried at high temperature to the melted pure aluminum ingot for reaction, cleaning the salt left after the reaction, adding and stirring evenly Al-Cu intermediate alloy and Al-Mn intermediate alloy to the mixture, adding and stirring evenly Al-Zr intermediate and an Mg ingot to the mixture, adjusting the temperature of the mixture, crashing the residues, refining the mixture, removing gases in the mixture, standing the mixture, adding and stirring an Al-Ti-B wire to the mixture and casing the mixture into an ingot, homogenizing the ingot, lathing the shell of the ingot and milling the surface of the ingot, extruding the ingot into a required section or rolling the ingot into a required plate, and carrying out solid solution treatment and ageing treatment for the required section or the required plate. The aluminium matrix composite produced with the method has the high-temperature resistant characteristic and the mechanical performances of high strength and high modulus.
Description
Technical field
The present invention relates to a kind of preparation method of metal-base composites, relate in particular to the method for preparing high-temperature resistant high-strength high-modulus aluminium matrix composite.
Background technology
Aluminum matrix composite has in light weight, specific strength, specific stiffness and shear strength height, thermal coefficient of expansion is low, advantage such as heat endurance, heat conduction, conduction, decay resistance are good, become the ideal material in the fields such as Aeronautics and Astronautics, automobile, electronics industry gradually, have a extensive future.
Find by literature search, patent application 200710190526.0 discloses a kind of aluminum copper alloy material and casting thereof, Technology for Heating Processing, adopting fine aluminium, aluminium copper, almag and aluminum titanium alloy is raw material, make through casting, heat treatment, aluminum copper alloy material has higher intensity, excellent plasticity, but be difficult to satisfy that industries such as Aeronautics and Astronautics, new and high technology are high temperature resistant, high strength, high-modulus requirement.
Employing TiB has been reported in patent application 200710072590.9
2High-strength plasticity aluminum-base composite material of particle and preparation method thereof, adopting titanium diboride enhancing body particle, alumina particles is raw material, adopt the mechanical mixture body powder that is enhanced, to strengthen the body powder and place mould inner pressure to make piece, mold heated makes aluminum alloy melting and is cast in the mould, the mould that is cast with aluminum melt is exerted pressure on forcing press, the time that keep-ups pressure also cools off, and ingot casting is taken out in the demoulding, promptly prepares reinforced aluminum matrix composites.Its preparation method be with titanium diboride strengthen the body particle, alumina particles is a raw material, sintering, extrusion modling, complex process, the cost height is difficult to accomplish scale production.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of preparation method of high-temperature resistant high-strength high-modulus aluminium matrix composite is provided.
Purpose of the present invention is achieved through the following technical solutions:
A kind of preparation method of high-temperature resistant high-strength high-modulus aluminium matrix composite specifically may further comprise the steps---
1) add the technical pure aluminium ingot in graphite crucible, heat fused adds the Mg ingot at 670～720 ℃, and slag hitting, refining, degasification cover with coverture;
2) adjusting temperature is 700～950 ℃, stirs aluminum melt with graphite agitator, adds the K of hyperthermia drying
2TiF
6, KBF
4, KAlF
6And MgF
2The salt-mixture reaction;
3) the residual salt of cleaning reaction, add Al-Cu intermediate alloy, Al-Mn intermediate alloy at 700～750 ℃, stir, add Al-Zr intermediate alloy, Mg ingot at 680～720 ℃, stir, adjusting temperature is 730～780 ℃, slag hitting, refining, degasification, leave standstill, add the Al-Ti-B silk, stir, pour into ingot casting at 730～780 ℃; Control component content Cu is 3.8～4.9wt% in manufacture process, and Mg is 1.2～1.8wt%, and Mn is 0.3～0.9wt%, and Zr is 0.1～0.25wt%, Zn≤0.25wt%, Cr≤0.1wt%, TiB
2Be 0.1～20%wt%, surplus is Al;
4) ingot casting is carried out homogenising and handle, the homogenising treatment temperature is 470～500 ℃, and the time is 15～28h; Railway carriage mills face, and ingot casting is squeezed into required section bar or is rolled into required sheet material;
5) extrudate or rolled plate are carried out solid solution and Ageing Treatment, the temperature of solution treatment is 480～500 ℃, and the time is 1～4h; The temperature of Ageing Treatment is 170～210 ℃, and the time is 6～18h.
Further, the preparation method of above-mentioned a kind of high-temperature resistant high-strength high-modulus aluminium matrix composite, the aluminium ingot fusion temperature is at 600～700 ℃ in the step 1), and the degasification temperature is at 720～750 ℃.
Further, the preparation method of above-mentioned a kind of high-temperature resistant high-strength high-modulus aluminium matrix composite, step 2) middle K
2TiF
6With KBF
4The ratio of amount of substance is 1: 2, KAlF
6And MgF
2Account for 5～40% of salt-mixture gross mass, and KAlF
6With MgF
2Mass ratio be (1: 1)～(4: 1).In addition, the K of described hyperthermia drying
2TiF
6, KBF
4, KAlF
6And MgF
2Salt-mixture, its bake out temperature are 100～350 ℃, time 12～30h.
Further, the preparation method of above-mentioned a kind of high-temperature resistant high-strength high-modulus aluminium matrix composite, its heating-up temperature is at 350～460 ℃ during step 4) extruding ingot casting, and extrusion ratio is 20～70, and extrusion speed is 1～10m/min.
Again further, the preparation method of above-mentioned a kind of high-temperature resistant high-strength high-modulus aluminium matrix composite, start rolling temperature is at 420～460 ℃ during the rolling ingot casting of step 4), and finishing temperature is at 250～300 ℃, deformation rate 70～95%.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
The present invention adopts the salt-mixture in-situ reaction to prepare aluminum matrix composite, the enhancing particle that reaction generates, and the interface cleaning combines well with aluminum substrate, even particle distribution, the aluminum matrix composite of preparing has high-temperature stability and high strength and modulus mechanical property.Production technology is simple, and cost of material is cheap, is easy to accomplish scale production, and economic benefit and social effect are remarkable.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: aluminum matrix composite TiB
2Particle SEM pattern;
Fig. 2: aluminum matrix composite XRD spectrum.
The specific embodiment
The present invention adopts the production of salt-mixture in-situ reaction to strengthen particle, the preparation high-temperature resistant high-strength high-modulus aluminium matrix composite.Its technology: at first, in graphite crucible, add the technical pure aluminium ingot, be heated to 600～700 ℃ of aluminium ingot fusings, add the Mg ingot at 670～720 ℃, slag hitting, refining, degasification cover with coverture, the degasification temperature is at 720～750 ℃, slagging agent is that ZS-AZ6 does not have the sodium type, and refining agent is that ZS-AJ6 does not have the sodium type, and coverture is that ZS-AF6 does not have the sodium type.Then, adjusting temperature is 700～950 ℃, stirs aluminum melt with graphite agitator, adds the salt-mixture reaction of hyperthermia drying, and salt-mixture is by K
2TiF
6, KBF
4, KAlF
6And MgF
2Mix K
2TiF
6With KBF
4The ratio of amount of substance is 1: 2, KAlF
6And MgF
2Account for 5～40% of salt-mixture gross mass respectively, and KAlF
6With MgF
2Mass ratio be (1: 1)～(4: 1).Then residual salt is reacted in cleaning, add Al-Cu intermediate alloy, Al-Mn intermediate alloy at 700～750 ℃, stir, add Al-Zr intermediate alloy, Mg ingot at 680～720 ℃, stir, adjusting temperature is 730～780 ℃, slag hitting, refining, degasification, leave standstill, add the Al-Ti-B silk, stir, pour into ingot casting at 730～780 ℃; Control component content Cu is 3.8～4.9wt% in manufacture process, and Mg is 1.2～1.8wt%, and Mn is 0.3～0.9wt%, and Zr is 0.1～0.25wt%, Zn≤0.25wt%, and Cr≤0.1wt%, TiB2 are 0.1～20%wt%, surplus is Al.Ingot casting is carried out homogenising again and handle, the homogenising treatment temperature is 470～500 ℃, and the time is 15～28h; Railway carriage mills face, and ingot casting is squeezed into required section bar or is rolled into required sheet material; Its heating-up temperature is at 350～460 ℃ during the extruding ingot casting, and extrusion ratio is 20～70, and extrusion speed is 1～10m/min; Start rolling temperature is at 420～460 ℃ during rolling ingot casting, and finishing temperature is at 250～300 ℃, deformation rate 70～95%.At last extrudate or rolled plate are carried out solid solution and Ageing Treatment, the temperature of solution treatment is 480～500 ℃, and the time is 1～4h; The temperature of Ageing Treatment is 170～210 ℃, and the time is 6～18h.
Below by specific embodiment technical scheme of the present invention is further described.
Embodiment 1:
Adopt the salt-mixture reaction method to prepare high-temperature resistant high-strength high-modulus aluminium matrix composite, its composition quality percentage is Cu 4.3, and Mg 1.5, and Mn 0.6, and Zr 0.15, TiB
210%, surplus is Al.
Its preparation process: adopt the high purity graphite crucible, after the aluminium ingot fusing, add the Mg ingot,, be warming up to 800 ℃, adopt the high purity graphite agitator to stir aluminum melt, add oven dry K in 740 ℃ of slag hittings, refining, degasification at 700 ℃
2TiF
6, KBF
4, KAlF
6And MgF
2The salt-mixture reaction, reaction time is 30min, the residual salt of cleaning reaction adds Al-Cu intermediate alloy, Al-Mn intermediate alloy at 750 ℃, at 700 ℃ of Mg ingots that add Al-Zr intermediate alloy, aluminium foil parcel, stir, be warming up to 750 ℃ of slag hittings, refining, degasification, leave standstill 15min, add the Al-Ti-B silk, stir, pour into ingot casting.Ingot casting carries out homogenising to be handled, and temperature is 490 ℃, and the time is 20h, and railway carriage is processed into φ 120 * 300mm extruding ingot casting.At 450 ℃ of heating ingot castings, insulation 4h, extrusion ratio is 36, extrusion speed is 4m/min, is squeezed into φ 10 bars.The bar solid solubility temperature is 493 ℃, and the time is 3h, and aging temp is 190 ℃, and aging time is 12h.
Carry out Mechanics Performance Testing, rod mechanical performance is: R
m〉=510MPa, R
P0.2〉=450MPa, A 〉=5.5, E 〉=82Gpa.
Aluminum matrix composite TiB shown in Figure 1
2Particle SEM pattern, TiB
2Even particle distribution, big or small homogeneous, regular shape, interface cleaning.Fig. 2 aluminum matrix composite XRD diffraction spectra, from figure as can be seen, aluminum matrix composite contains TiB
2The particle wild phase.
Embodiment 2:
Adopt the salt-mixture reaction method to prepare high-temperature resistant high-strength high-modulus aluminium matrix composite, its composition quality percentage is Cu 4.9, and Mg 1.2, and Mn 0.3, and Zr 0.25, TiB
215%, surplus is Al.
Its preparation process: adopt the high purity graphite crucible, after the aluminium ingot fusing, add the Mg ingot,, be warming up to 950 ℃, adopt the high purity graphite agitator to stir aluminum melt, add oven dry K in 750 ℃ of slag hittings, refining, degasification at 720 ℃
2TiF
6, KBF
4, KAlF
6And MgF
2The salt-mixture reaction, reaction time is 30min, the residual salt of cleaning reaction adds Al-Cu intermediate alloy, Al-Mn intermediate alloy at 750 ℃, at 720 ℃ of Mg ingots that add Al-Zr intermediate alloy, aluminium foil parcel, stir, be warming up to 780 ℃ of slag hittings, refining, degasification, leave standstill 15min, add the Al-Ti-B silk, stir, pour into ingot casting.Ingot casting carries out homogenising to be handled, and temperature is 500 ℃, and the time is 15h, and railway carriage is processed into φ 120 * 300mm extruding ingot casting.At 460 ℃ of heating ingot castings, insulation 4h, extrusion ratio is 36, extrusion speed is 2m/min, is squeezed into φ 10 bars.The bar solid solubility temperature is 500 ℃, and the time is 1h, and aging temp is 210 ℃, and aging time is 6h.Carry out Mechanics Performance Testing, rod mechanical performance is: R
m〉=522MPa, R
P0.2〉=458MPa, A 〉=4, E 〉=85Gpa.
Embodiment 3:
Adopt the salt-mixture reaction method to prepare high-temperature resistant high-strength high-modulus aluminium matrix composite, its composition quality percentage is Cu 3.8, and Mg 1.8, and Mn 0.9, and Zr 0.1, TiB
20.1%, surplus is Al.
Its preparation process: adopt the high purity graphite crucible, after the aluminium ingot fusing, add the Mg ingot,, be warming up to 700 ℃, adopt the high purity graphite agitator to stir aluminum melt, add oven dry K in 720 ℃ of slag hittings, refining, degasification at 670 ℃
2TiF
6, KBF
4, KAlF
6And MgF
2The salt-mixture reaction, reaction time is 30min, the residual salt of cleaning reaction adds Al-Cu intermediate alloy, Al-Mn intermediate alloy at 700 ℃, at 700 ℃ of Mg ingots that add Al-Zr intermediate alloy, aluminium foil parcel, stir, be warming up to 730 ℃ of slag hittings, refining, degasification, leave standstill 15min, add the Al-Ti-B silk, stir, pour into ingot casting.Ingot casting carries out homogenising to be handled, and temperature is 470 ℃, and the time is 28h, and railway carriage is processed into φ 120 * 300mm extruding ingot casting.At 350 ℃ of heating ingot castings, insulation 4h, extrusion ratio is 36, extrusion speed is 5m/min, is squeezed into φ 10 bars.The bar solid solubility temperature is 480 ℃, and the time is 4h, and aging temp is 170 ℃, and aging time is 18h.
Carry out Mechanics Performance Testing, rod mechanical performance is: R
m〉=485MPa, R
P0.2〉=435MPa, A 〉=8, E 〉=73Gpa.
Embodiment 4:
Adopt the salt-mixture reaction method to prepare high-temperature resistant high-strength high-modulus aluminium matrix composite, its composition quality percentage is Cu 4.0, and Mg 1.6, and Mn 0.5, and Zr 0.1, TiB
25%, surplus is Al.
Its preparation process: adopt the high purity graphite crucible, after the aluminium ingot fusing, add the Mg ingot,, be warming up to 750 ℃, adopt the high purity graphite agitator to stir aluminum melt, add oven dry K in 730 ℃ of slag hittings, refining, degasification at 690 ℃
2TiF
6, KBF
4, KAlF
6And MgF
2The salt-mixture reaction, reaction time is 30min, the residual salt of cleaning reaction adds Al-Cu intermediate alloy, Al-Mn intermediate alloy at 750 ℃, at 710 ℃ of Mg ingots that add Al-Zr intermediate alloy, aluminium foil parcel, stir, be warming up to 740 ℃ of slag hittings, refining, degasification, leave standstill 15min, add the Al-Ti-B silk, stir, pour into ingot casting.Ingot casting carries out homogenising to be handled, and temperature is 480 ℃, and the time is 18h, and railway carriage is processed into the rolling ingot casting of 55 * 120 * 300mm.Start rolling temperature is at 460 ℃, and finishing temperature is at 300 ℃, and deformation rate 90% is rolled into 5mm sheet material.Sheet material carries out solid solution, and solid solubility temperature is 490 ℃, and the time is 2h, and aging temp is 200 ℃, and aging time is 10h.
Carry out Mechanics Performance Testing, the sheet material mechanical property is: R
m〉=500MPa, R
P0.2〉=440MPa, A 〉=7, E 〉=77Gpa.
In sum, the present invention adopts the salt-mixture in-situ reaction to prepare aluminum matrix composite, the enhancing particle that reaction generates, the interface cleaning, combine well with aluminum substrate, even particle distribution, aluminum matrix composite has high-temperature stability and high strength and modulus mechanical property.Production technology is simple, and cost of material is cheap, is easy to accomplish scale production, and has a extensive future
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (5)
1. the preparation method of a high-temperature resistant high-strength high-modulus aluminium matrix composite is characterized in that: specifically may further comprise the steps---
1) add the technical pure aluminium ingot in graphite crucible, heat fused adds the Mg ingot at 670～720 ℃, and slag hitting, refining, degasification cover with coverture;
2) adjusting temperature is 700～950 ℃, stirs aluminum melt with graphite agitator, adds the K of hyperthermia drying
2TiF
6, KBF
4, KAlF
6And MgF
2The salt-mixture reaction;
3) the residual salt of cleaning reaction, add Al-Cu intermediate alloy, Al-Mn intermediate alloy at 700～750 ℃, stir, add Al-Zr intermediate alloy, Mg ingot at 680～720 ℃, stir, adjusting temperature is 730～780 ℃, slag hitting, refining, degasification, leave standstill, add the Al-Ti-B silk, stir, pour into ingot casting at 730～780 ℃; Control component content Cu is 3.8～4.9wt% in manufacture process, and Mg is 1.2～1.8wt%, and Mn is 0.3～0.9wt%, and Zr is 0.1～0.25wt%, Zn≤0.25wt%, Cr≤0.1wt%, TiB
2Be 0.1～20%wt%, surplus is Al;
4) ingot casting is carried out homogenising and handle, the homogenising treatment temperature is 470～500 ℃, and the time is 15～28h; Railway carriage mills face, and ingot casting is squeezed into required section bar or is rolled into required sheet material;
5) extrudate or rolled plate are carried out solid solution and Ageing Treatment, the temperature of solution treatment is 480～500 ℃, and the time is 1～4h; The temperature of Ageing Treatment is 170～210 ℃, and the time is 6～18h.
2. the preparation method of a kind of high-temperature resistant high-strength high-modulus aluminium matrix composite according to claim 1, it is characterized in that: the aluminium ingot fusion temperature is at 600～700 ℃ in the step 1), and the degasification temperature is at 720～750 ℃.
3. the preparation method of a kind of high-temperature resistant high-strength high-modulus aluminium matrix composite according to claim 1 is characterized in that: step 2) middle K
2TiF
6With KBF
4The ratio of amount of substance is 1: 2, KAlF
6And MgF
2Account for 5～40% of salt-mixture gross mass respectively, and KAlF
6With MgF
2Mass ratio be 1～4: 1.
4. the preparation method of a kind of high-temperature resistant high-strength high-modulus aluminium matrix composite according to claim 1 is characterized in that: its heating-up temperature is at 350～460 ℃ during step 4) extruding ingot casting, and extrusion ratio is 20～70, and extrusion speed is 1～10m/min.
5. the preparation method of a kind of high-temperature resistant high-strength high-modulus aluminium matrix composite according to claim 1 is characterized in that: start rolling temperature is at 420～460 ℃ during the rolling ingot casting of step 4), and finishing temperature is at 250～300 ℃, deformation rate 70～95%.
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ID=42457929
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102936707A (en) * | 2012-11-21 | 2013-02-20 | 江苏大学 | Device and method for refining aluminum matrix composite material matrix organization |
| CN104419853A (en) * | 2013-08-20 | 2015-03-18 | 烟台双诚机械有限公司 | Method for casting multiple unit motor end cover through special aluminum-magnesium alloy |
| CN104862508A (en) * | 2015-05-15 | 2015-08-26 | 中国航空工业集团公司北京航空材料研究院 | Method for preparing aluminum-based graphene composite material |
| CN106282862A (en) * | 2016-08-31 | 2017-01-04 | 上海交通大学 | The method improving aluminum based composite material enhanced by granules in situ structure property uniformity |
| CN107779796A (en) * | 2016-08-29 | 2018-03-09 | 上海交通大学 | The heat treatment method of aluminum matrix composite |
| CN109338169A (en) * | 2018-11-07 | 2019-02-15 | 天津圣金特汽车配件有限公司 | A kind of manufacturing process of novel aluminum alloy automobile engine bracket |
| CN110512111A (en) * | 2018-04-11 | 2019-11-29 | 上海交通大学 | The preparation method of in-situ Al-base composition |
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2008
- 2008-11-19 CN CN200810235979A patent/CN101733622A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102936707A (en) * | 2012-11-21 | 2013-02-20 | 江苏大学 | Device and method for refining aluminum matrix composite material matrix organization |
| CN102936707B (en) * | 2012-11-21 | 2014-10-29 | 江苏大学 | Device and method for refining aluminum matrix composite material matrix organization |
| CN104419853A (en) * | 2013-08-20 | 2015-03-18 | 烟台双诚机械有限公司 | Method for casting multiple unit motor end cover through special aluminum-magnesium alloy |
| CN104862508A (en) * | 2015-05-15 | 2015-08-26 | 中国航空工业集团公司北京航空材料研究院 | Method for preparing aluminum-based graphene composite material |
| CN104862508B (en) * | 2015-05-15 | 2016-09-28 | 中国航空工业集团公司北京航空材料研究院 | A kind of preparation method of aluminum base graphene composite material |
| CN107779796A (en) * | 2016-08-29 | 2018-03-09 | 上海交通大学 | The heat treatment method of aluminum matrix composite |
| CN106282862A (en) * | 2016-08-31 | 2017-01-04 | 上海交通大学 | The method improving aluminum based composite material enhanced by granules in situ structure property uniformity |
| CN106282862B (en) * | 2016-08-31 | 2018-02-02 | 上海交通大学 | Improve the method for aluminum based composite material enhanced by granules in situ structure property uniformity |
| CN110512111A (en) * | 2018-04-11 | 2019-11-29 | 上海交通大学 | The preparation method of in-situ Al-base composition |
| CN109338169A (en) * | 2018-11-07 | 2019-02-15 | 天津圣金特汽车配件有限公司 | A kind of manufacturing process of novel aluminum alloy automobile engine bracket |
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Application publication date: 20100616 |