CN1381322A - Process for preparing particle reinforce Al-alloy based composite tube with functionally negative gradient - Google Patents
Process for preparing particle reinforce Al-alloy based composite tube with functionally negative gradient Download PDFInfo
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- CN1381322A CN1381322A CN 01113848 CN01113848A CN1381322A CN 1381322 A CN1381322 A CN 1381322A CN 01113848 CN01113848 CN 01113848 CN 01113848 A CN01113848 A CN 01113848A CN 1381322 A CN1381322 A CN 1381322A
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Abstract
A particle-reinforced functional negative gradient composite Al-alloy based pipe whose particle density is increased from external surface to internal surface is prepared through preparing the slurry containing particles by the liquid-state method, depositing the slurry enriched by particles to the bottom of crucible by controlling the power supply power of induction furnace, and directly casting with horizontal centrifugal casting machine. Its internal surface has high antiwear and anticorrosion performance, and low thermal expandability.
Description
The present invention relates to functional gradient composite materials, specifically a kind of preparation method of particle reinforce Al-alloy based composite tube with functionally negative gradient.
FGM be a Japanese scientist Xinye just at " material foundation " 1987, volume 10, page or leaf 31 (M.Niino:Funct.Mater., 1987, vol.10, a kind of advanced composite material (ACM) that proposes in p.31) is at present about preparation SiC or Al
2O
3Isodensity adopts centre spinning greater than the particle reinforced aluminum alloy base functionally graded composite tube of aluminum matrix alloy, according to the refined history of Hooke, the learned history of watt, " metallurgy and material transactions A ", 1996, volume 27A, page or leaf 4145 (Y.Fukui, and Y.Watanabe:Metall.Mater.TransA., 1996, vol.27A, p4145) and Liu Qingmin, Jiao Yuning, Yang Yuansheng, Hu Zhuanqi, " metallurgical material transactions B ", 1996, volume 27B, page or leaf 1025 (Q.M.Liu, Y.N.Jiao, Y.S.Yang, and Z.Q.Hu:Metall.Mater.Trans B., 1996, vol.27B, p1025) report, its product are that outer surface is laid the structure of one deck density greater than the particulate reinforced composite of aluminum matrix alloy, and the particle volume percentage in the cast tube reduces gradually from outer surface to the inner surface of multiple tube, the present patent application is referred to as a kind of function positive gradient multiple tube, though this multiple tube has good performance at outer surface, owing to inner surface is not handled, so the deficiency of its inner surface performance has influenced the application of product.At present existing people joins inner surface with density less than the graphite of aluminum matrix alloy, but can only play the lubricated effect that waits.Under the condition of grain density greater than aluminum matrix alloy, adopt the prepared multiple tube of centre spinning, particle volume percentage is that situation about raising gradually yet there are no report from outer surface to inner surface.
The purpose of this invention is to provide a kind ofly under the condition of grain density greater than aluminum matrix alloy, the percentage by volume that makes particle is the preparation method of the particle reinforce Al-alloy based composite tube with functionally negative gradient that increases from outer surface to the inner surface of multiple tube.
Technical scheme of the present invention is to adopt non-vacuum induction furnace, the horizontal centrifugal casting machine, and its concrete preparation process is as follows:
In non-vacuum induction furnace with alloy matrix aluminum and density particle greater than aluminum matrix alloy, adopt the absence of vortices legal system to be equipped with into slurry, temperature is controlled at 1003～1023K scope, make in the described slurry particle and aluminum matrix alloy wetting and have the excellent contact interface, cooling makes slurry be in semisolid then;
2. ready described slurry is heated in non-vacuum induction furnace, adopt the mode of high-power being rapidly heated (programming rate is 8～10K/ minute) to make the slurry of enrichment particle deposit to the bottom of crucible, when temperature rises to 1023～1043K, reduce the power insulation, wait for casting;
3. running channel is preheated to 873～1073k;
4. startup centrifugal casting machine, not preheating of mold is determined the casting machine rotating speed according to caliber and wall thickness;
5. under charged situation, directly the slurry that step 2 is prepared pours into casting machine, makes the function negative gradient multiple tube that density strengthens greater than the particle of aluminum matrix alloy, density greater than the particle of aluminum matrix alloy in the enrichment of multiple tube internal layer.
Described aluminum matrix alloy is Birmasil or wrought aluminium alloy; Density is SiC, Al greater than the particle of aluminum matrix alloy
2O
3Or ZrO
2Deng, diameter is 3.5 μ m～100 μ m.
The present invention has following advantage:
The present invention utilizes non-vacuum induction furnace heating and the moulding of horizontal centrifugal casting machine, makes particle (SiC, the Al of density greater than aluminum matrix alloy (Birmasil or wrought aluminium alloy)
2O
3, ZrO
2Deng) be distributed in the internal layer of cast tube, make internal layer have high strength, high rigidity, wear-resisting, corrosion resistance that thermal coefficient of expansion is low and good etc.And outer because the particle meager set has good toughness and plasticity, internal layer there is the effect of supporting and cushioning, promptly material has gradient performance, and compared with prior art, particle volume percentage radially is raising trend from outer surface to inner surface along multiple tube.Can be applicable to that internal layer needs the low high temperature of excellent abrasive resistance and thermal coefficient of expansion, wear extent is big and outer and do not require excellent abrasive resistance and the low occasion of thermal coefficient of expansion, adopt homogeneous material as piston of automobile, because thermal stress effect, easily make inner surface generation crackle, adopt the present invention can reach ideal effect.
Fig. 1 is the low power phase (grey color part is a SiC particle enriched layer) of the embodiment of the invention 1 particle reinforce Al-alloy based composite tube with functionally negative gradient 1/4th cross sections.
Fig. 2 is the low power phase (grey color part is a SiC particle enriched layer) of the embodiment of the invention 1 particle reinforce Al-alloy based composite tube with functionally negative gradient 1/8th longitudinal sections.
Fig. 3 is the embodiment of the invention 1 particle reinforce Al-alloy based composite tube with functionally negative gradient sample microhardness and SiC particle volume percentage change curve (the multiple tube inner surface is the origin of coordinates) radially.
Below in conjunction with drawings and Examples the present invention is described in further detail.
Adopt antivacuum intermediate frequency furnace, the horizontal centrifugal casting machine, in antivacuum intermediate frequency furnace, be the SiC particle of 10 μ m greater than the diameter of aluminum matrix alloy with alloy matrix aluminum (ZL109 Birmasil) and density, adopt the absence of vortices legal system to be equipped with into slurry, temperature is controlled at 1003K, make particle and aluminum matrix alloy wetting and the excellent contact interface is arranged, be cooled to 963K then, and make slurry be in semisolid; Described slurry is heated in non-vacuum induction furnace, start centrifugal casting machine when the mode that adopts high-power (the about 9K/ of programming rate minute) to be rapidly heated makes temperature rise to 1023K, the casting machine rotating speed is 1800 rev/mins, and running channel is preheated to 873K; Not preheating of mold; Under charged situation, directly the slurry for preparing is poured into casting machine; Make the function negative gradient multiple tube that SiC particle (10 μ m) strengthens, the about 16mm of multiple tube thickness of pipe wall, external diameter of pipe 80mm, long 94mm.
To the present invention along tubular axle combined to the intercepting about 1/4th after, carry out machine glazed finish along multiple tube is radial and axial, draw multiple tube cross section and longitudinal section low power mutually, as depicted in figs. 1 and 2, gray area is the particle enrichment region among the figure, and white portion is particle meager set district.Adopt the computer image analysis method, to particle (SiC, 10 μ m) strengthening function negative gradient multiple tube particle volume percentage radially measures, its result (under Fig. 3) shows: particle volume percentage radially is rising trend from outer surface to inner surface along multiple tube, that is to say, the particle enrichment region is positioned at the internal layer of multiple tube, its microhardness (on Fig. 3) and particle volume percentage be distributed with similar trend.
Embodiment 2
Difference from Example 1 is:
In antivacuum intermediate frequency furnace, be the Al of 3.5 μ m greater than the diameter of aluminum matrix alloy with alloy matrix aluminum (LY12 wrought aluminium alloy) and density
2O
3Particle adopts the absence of vortices legal system to be equipped with into slurry, and temperature is controlled at 1023K, makes particle and aluminum matrix alloy wetting and the excellent contact interface is arranged, and is cooled to 973K then, and makes slurry be in semisolid; Described slurry is heated in non-vacuum induction furnace, reduce the power insulation when mode that adopts high-power (the about 8K/ of programming rate minute) to be rapidly heated makes temperature rise to 1033K, wait for casting; Running channel is preheated to 973K; Start centrifugal casting machine, the casting machine rotating speed is 1800 rev/mins, not preheating of mold; Under charged situation, directly the slurry for preparing is poured into casting machine; Make Al
2O
3The function negative gradient multiple tube that particle (3.5 μ m) strengthens, the about 16mm of multiple tube thickness of pipe wall, external diameter of pipe 80mm, long 94mm.
Embodiment 3
Difference from Example 1 is:
In antivacuum intermediate frequency furnace, be the ZrO of 50 μ m greater than the diameter of aluminum matrix alloy with alloy matrix aluminum (ZL109 Birmasil) and density
2Particle adopts the absence of vortices legal system to be equipped with into slurry, and temperature is controlled at 1013K, makes particle and aluminum matrix alloy wetting and the excellent contact interface is arranged, and is cooled to 983K then, and makes slurry be in semisolid; Described slurry is heated in antivacuum intermediate frequency furnace, reduce the power insulation when mode that adopts high-power (the about 10K/ of programming rate minute) to be rapidly heated makes temperature rise to 1043k, wait for casting; Running channel is preheated to 1073k; Start centrifugal casting machine, the casting machine rotating speed is 1800 rev/mins, not preheating of mold; Under charged situation, directly the slurry for preparing is poured into casting machine, make ZrO
2The function negative gradient multiple tube that particle (50 μ m) strengthens, the about 16mm of multiple tube thickness of pipe wall, external diameter of pipe 80mm, long 94mm.
Claims (3)
1. the preparation method of a particle reinforce Al-alloy based composite tube with functionally negative gradient is characterized in that: adopt non-vacuum induction furnace, and the horizontal centrifugal casting machine, its concrete preparation process is as follows:
1) in non-vacuum induction furnace with alloy matrix aluminum and density particle greater than aluminum matrix alloy, adopt the absence of vortices legal system to be equipped with into slurry, temperature is controlled at 1003～1023K scope, make in the described slurry particle and aluminum matrix alloy wetting and have the excellent contact interface, cooling makes slurry be in semisolid then;
2) ready described slurry is heated in non-vacuum induction furnace, adopt the high-power mode that is rapidly heated to make the slurry of enrichment particle deposit to the bottom of crucible, programming rate is 8～10K/ minute, reduces the power insulation when temperature rises to 1023～1043K, waits for casting;
3) running channel is preheated to 873～1073k;
4) start centrifugal casting machine, not preheating of mold is determined the casting machine rotating speed according to caliber and wall thickness;
5) under charged situation, the slurry that directly step 2 is prepared pours into casting machine, makes the function negative gradient multiple tube that density strengthens greater than the particle of aluminum matrix alloy, density greater than the particle of aluminum matrix alloy in the enrichment of multiple tube internal layer.
2. according to the preparation method of the described particle reinforce Al-alloy based composite tube with functionally negative gradient of claim 1, it is characterized in that: described aluminum matrix alloy is Birmasil or wrought aluminium alloy.
3. according to the preparation method of the described particle reinforce Al-alloy based composite tube with functionally negative gradient of claim 1, it is characterized in that: density is SiC, Al greater than the particle of aluminum matrix alloy
2O
3Or ZrO
2, diameter is 3.5 μ m～100 μ m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01113848 CN1381322A (en) | 2001-04-13 | 2001-04-13 | Process for preparing particle reinforce Al-alloy based composite tube with functionally negative gradient |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01113848 CN1381322A (en) | 2001-04-13 | 2001-04-13 | Process for preparing particle reinforce Al-alloy based composite tube with functionally negative gradient |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134237B (en) * | 2007-10-11 | 2010-06-30 | 丁家伟 | Reinforcing phase metallic gradient composite material manufacturing process and equipment thereof |
| CN103231036A (en) * | 2013-05-02 | 2013-08-07 | 昆明理工大学 | Centrifugal overflowing part with compounded inner surface and preparation process for overflowing part |
| CN101678440B (en) * | 2007-04-11 | 2015-05-06 | 美铝公司 | Functionally graded metal matrix composite sheet |
| CN109317667A (en) * | 2018-11-28 | 2019-02-12 | 湖南恒裕新材料科技发展有限公司 | The preparation method of one specific admixture aluminum matrix composite tubing |
| CN111515360A (en) * | 2020-04-23 | 2020-08-11 | 昆明理工大学 | Preparation method of cylindrical multilayer composite casting |
| WO2022078528A1 (en) * | 2020-12-31 | 2022-04-21 | 北京科技大学 | Melt flow rate adjusting system and method for multi-element radial functionally gradient material apparatus |
-
2001
- 2001-04-13 CN CN 01113848 patent/CN1381322A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101678440B (en) * | 2007-04-11 | 2015-05-06 | 美铝公司 | Functionally graded metal matrix composite sheet |
| CN101134237B (en) * | 2007-10-11 | 2010-06-30 | 丁家伟 | Reinforcing phase metallic gradient composite material manufacturing process and equipment thereof |
| CN103231036A (en) * | 2013-05-02 | 2013-08-07 | 昆明理工大学 | Centrifugal overflowing part with compounded inner surface and preparation process for overflowing part |
| CN109317667A (en) * | 2018-11-28 | 2019-02-12 | 湖南恒裕新材料科技发展有限公司 | The preparation method of one specific admixture aluminum matrix composite tubing |
| CN109317667B (en) * | 2018-11-28 | 2021-07-30 | 湖南金马铝业有限责任公司 | Preparation method of hybrid aluminum-based composite pipe |
| CN111515360A (en) * | 2020-04-23 | 2020-08-11 | 昆明理工大学 | Preparation method of cylindrical multilayer composite casting |
| WO2022078528A1 (en) * | 2020-12-31 | 2022-04-21 | 北京科技大学 | Melt flow rate adjusting system and method for multi-element radial functionally gradient material apparatus |
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