CN100406598C - Composite material for automobile brake disc and its preparing method - Google Patents
Composite material for automobile brake disc and its preparing method Download PDFInfo
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- CN100406598C CN100406598C CNB031271456A CN03127145A CN100406598C CN 100406598 C CN100406598 C CN 100406598C CN B031271456 A CNB031271456 A CN B031271456A CN 03127145 A CN03127145 A CN 03127145A CN 100406598 C CN100406598 C CN 100406598C
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- automobile brake
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Abstract
The present invention relates to a particle reinforced aluminum matrix composite material and a preparation method thereof particularly suitable for preparing vehicle braking discs. The material is composed of Mg2Si reinforced particles which are generated in situ in the process of casting solidification and are diffused and distributed in an aluminium alloy matrix which comprises Si and Cu. the weight percentage content of components of the material comprises: 15 to 35% of Mg2Si, 1 to 15% of Si, 1 to 5% Cu and Al as the rest. The technological process for preparing the material comprises the steps: industrial pure Mg, pure copper and a master alloy of which the weight percentage is Al-20%Si are used as raw material, and covering agents are added after matching material is melted; scouring agents are added after the industrial pure Mg is added and melted at the temperature of 690 DEG C to 720DEG. C and the temperature is uniform, and the temperature is preserved for 5 minutes to 10 minutes; modification agents are added, and temperature is preserved more than 5 minutes; the present invention is cast and formed according to the ordinary casting process. The material has the advantages of high strength, rigidity, plasticity, size stability and good abrasion resistance.
Description
Technical field
The present invention relates to particles reiforced metal-base composition and preparation method thereof, particularly a kind of particle enhanced aluminum-based composite material that is applicable to the manufacturing automobile brake disc and preparation method thereof.
Background technology
Along with improving constantly of energy scarcity and car speed, energy-conservation with loss of weight is that the vehicle lightweight technological development of purpose receives much concern.Compare with the conventional steel iron material, particle enhanced aluminum-based composite material has higher specific tenacity, specific rigidity, good thermostability and wear resistance are well suited for being used for making automobile and high-speed train braking system and retarding disc, so that the weight of vehicle suspension system alleviates significantly.States such as day, moral, U.S. have all carried out exploitation, research to this, not only loss of weight is energy-conservation to confirm the composite brake dish, and vibration and noise in can less brake process, and it is respond well to shorten braking distance.At present the subject matter that exists of particle enhanced aluminum-based composite material be interfacial bonding property poor, often with the generation of interface reflection, easily cause processing difficulties, be difficult to reuse, cost an arm and a leg.
The preparation method of particle enhanced aluminum-based composite material mainly comprises following several at present: (1) liquid paddling process; (2). squeeze casting method; (3). self-spread synthesizing method; (4). the melt infiltration method; (5). powder metallurgic method or the like.Existing particle enhanced aluminum-based composite material goods no matter adopt above-mentioned what clock technology all to exist the problem of complex process, make it be difficult to enlarge and produce, and this makes the manufacturing and applying of composite brake dish be restricted.
Summary of the invention
It is preferable to the purpose of this invention is to provide a kind of over-all properties, with low cost, processibility better and the novel aluminium based matrix material that can recycle, to be specially adapted to make automobile or brake disc of high-speed train.
Automobile brake disc matrix material of the present invention is with generated in-situ Mg in the casting solidification process
2The disperse of Si enhanced granule is distributed in the alloy matrix aluminum that contains Si, Cu and forms, and its component weight percent content is: Mg
2Si15-35%, Si1-15%, Cu1-5%, Al surplus.
The automobile brake disc of the present invention preparation method of matrix material comprises following technological process:
A. be raw material with pure magnesium, fine copper, Al-20%Si master alloy, prepare burden as following weight percent: Cu 1～5%, Mg9～23%, surplus are the Al-20%Si master alloy;
B. at 680-900 ℃ the fine copper of said ratio amount and Al-20%Si master alloy fusing back added that to account for above-mentioned batching total weight percent be 1～5% insulating covering agent;
C. it is even to fusing and temperature at 690-720 ℃ of pure magnesium that adds the said ratio amount to adjust temperature.
D. add the refining agent that to account for above-mentioned batching total weight percent be 1-2%, be incubated 5-10 minute;
E. add the alterant that to account for above-mentioned batching total weight percent be 0.005-3%, insulation is more than 5 minutes;
F. press conventional cast technology casting.
Because it is raw material that the present invention adopts weight percent Al-20%Si alloy, pure magnesium and fine copper, prepares Mg
2The Si/Al-Si-Cu matrix material, the Mg that its wild phase forms except in-situ endogenic
2Beyond the Si, the CuAl that also has Si phase and reaction to generate
2Phase, especially by after the solution heat treatment, CuAl
2Can play the solution strengthening effect.When comprehensive mechanical performance obviously improved, processing characteristics also improved.This material has higher intensity, hardness, plasticity, dimensional stability and good wear resistance.
The preparation method of matrix material of the present invention compared with prior art has following characteristics: 1. technology is simple, material is synthesized with the casting process combine, and has simplified preparation technology; 2. with low cost; 3. processibility is better; 4. it is convenient to recycle; 5. by changing alloying constituent, can make things convenient for and control wild phase Mg exactly
2The quantity of Si; Can control size, form and the distribution of wild phase effectively by rotten processing.
Description of drawings
Fig. 1 is that to have weight percent be 15%Mg
2The aluminum matrix composite microtexture photo of Si enhanced granule.
Fig. 2 is that to have weight percent be 15%Mg
2The aluminum matrix composite X-ray analysis collection of illustrative plates of Si enhanced granule.
Fig. 3 is that to have weight percent be 20%Mg
2The Si enhanced granule, the aluminum matrix composite microtexture photo after Sr is rotten.
Fig. 4 is that to have weight percent be 25%Mg
2The Si enhanced granule, the aluminum matrix composite microtexture photo after mixing salt is rotten.
Embodiment
Embodiment 1
It is 25%Mg that preparation contains weight percent
2The as cast condition aluminum matrix composite of Si particle wild phase.
Mg: Al-20%Si: Cu takes by weighing pure magnesium, Al-20%Si master alloy and copper at 16: 79: 5 by weight percentage, and taking by weighing weight percent by above-mentioned alloy gross weight again is 2% CaF
2+ MgCl
2.KCl as insulating covering agent, take by weighing above-mentioned alloy total weight percent and be 1% NaCl as refining agent.With melting in Al-20%Si master alloy and the Cu adding crucible, add the CaF that has taken by weighing then
2+ MgCl
2.KCl insulating covering agent adds the above-mentioned pure magnesiums that take by weighing at 690～720 ℃, adds the above-mentioned NaCl refining agent insulation that takes by weighing 5-10 minute at 700-800 ℃, removes residue, adds that to account for above-mentioned alloy total weight percent be 1% K
2TiF
6, KBF
4, KCI mixing salt alterant, the insulation more than 5 minutes after, be poured in the metal mold at 720-730 ℃, obtaining weight percent is 25%Mg
2The as cast condition aluminum matrix composite of Si particle wild phase.Its composition weight percent is 25%Mg
2Si, 6.8%Si, 5%Cu, Al surplus.
Embodiment 2:
It is 15%Mg that preparation contains weight percent
2Si particle wild phase heat treatment state aluminum matrix composite.
Mg: Al-20%Si: Cu takes by weighing pure magnesium, Al-20%Si master alloy and copper at 9.5: 89.5: 1 by weight percentage, and taking by weighing weight percent by the gross weight of above-mentioned alloy again is 3% CaF
2+ MgCl
2.KCl insulating covering agent and 1% Na
3AlF
6Refining agent.With melting in above-mentioned Al-20%Si master alloy that takes by weighing and the Cu adding crucible, add the above-mentioned CaF that takes by weighing then
2+ MgCl
2.KCl insulating covering agent adds the above-mentioned pure magnesium that takes by weighing at 690-720 ℃, is 1% Na at 700～800 ℃ of adding weight percents
3AlF
6Residue is removed in refining agent insulation 5～10 minutes, adds above-mentioned weight alloy per-cent and be 0.05% the Sr processing of go bad, is incubated more than 5 minutes, is poured in the metal mold, and obtaining the as cast condition weight percent is 15%Mg
2The Si particulate reinforced composite.This matrix material 430 ± 5 ℃ the insulation 8 hours, immerse in the 60-100 ℃ of water after, obtaining containing weight percent is 15%Mg
2Si particle wild phase heat treatment state aluminum matrix composite.Its composition weight percent is 15%Mg
2Si, 12.4%Si, 1%Cu, surplus are Al.
Embodiment 3
It is 35%Mg that preparation contains weight percent
2Si particle wild phase as cast condition aluminum matrix composite.
Mg: Al-20%Si: Cu takes by weighing pure magnesium, Al-20%Si master alloy and copper at 22: 75.5: 2.5 by weight percentage, and taking by weighing weight percent by the gross weight of above-mentioned alloy again is 2% CaF
2+ MgCl
2.KCl insulating covering agent and 1% CaF
2Refining agent.With melting in above-mentioned Al-20%Si master alloy that takes by weighing and the Cu adding crucible, add the above-mentioned CaF that takes by weighing then
2+ MgCl
2.KCl insulating covering agent adds the above-mentioned pure magnesium that takes by weighing at 690-720 ℃, is 1% CaF at 700～800 ℃ of above-mentioned weight percents that take by weighing of adding
6Residue is removed in refining agent insulation 5～10 minutes, adds the K of above-mentioned weight alloy 1%
2TiF
6Carry out composite inoculating with 0.03%Sr and handle, insulation more than 5 minutes after, be poured in the metal mold at 720-730 ℃, obtaining the as cast condition weight percent is 35%Mg
2Si as cast condition aluminum matrix composite.Its composition weight percent is 35%Mg
2Si, 2.1%Si, 2.5%Cu, surplus are Al.
Embodiment 4
Preparation Jetta automobile brake disc.
Mg: Al-20%Si: Cu takes by weighing pure magnesium, Al-20%Si master alloy and copper at 12.5: 84.5: 3 by weight percentage, and taking by weighing weight percent by the gross weight of above-mentioned alloy again is 3.5% CaF
2+ MgCl
2.KCl insulating covering agent and 1% MgCl
2Refining agent.With melting in above-mentioned Al-20%Si master alloy that takes by weighing and the Cu adding crucible, add the above-mentioned CaF that takes by weighing then
2+ MgCl
2.KCl insulating covering agent adds the above-mentioned pure magnesium that takes by weighing at 690-720 ℃, is 1% MgCl at the 700-800 ℃ of above-mentioned weight percent that takes by weighing of adding
2Residue is removed in refining agent insulation 5-10 minute, add the Sr that accounts for above-mentioned alloy gross weight 0.02% and go bad, insulation more than 5 minutes after, be poured in the retarding disc metal type dies at 720～730 ℃, promptly obtaining weight percent is 20%Mg
2Si as cast condition Jetta car retarding disc.This retarding disc 430 ± 5 ℃ the insulation 8 hours, immerse in the 60-100 ℃ of water after, obtaining weight percent is 20%Mg
2Si heat treatment state aluminum matrix composite Jetta automobile brake disc, its composition weight percent is 20%Mg
2Si, 9.7%Si, 3%Cu, surplus are Al.
Claims (4)
1. an automobile brake disc is characterized in that comprising following technological process with the preparation method of matrix material:
A. be raw material with pure magnesium, fine copper, Al-20%Si master alloy, prepare burden as following weight percent: Cu1～5%, Mg9～23%, surplus are the Al-20%Si master alloy;
B. at 680-900 ℃ the fine copper of said ratio amount and Al-20%Si master alloy fusing back added that to account for above-mentioned batching total weight percent be 1～5% insulating covering agent;
C. it is even to fusing and temperature at 690-720 ℃ of pure magnesium that adds the said ratio amount to adjust temperature.
D. add the refining agent that to account for above-mentioned batching total weight percent be 1-2%, be incubated 5-10 minute;
E. add the alterant that to account for above-mentioned batching total weight percent be 0.005-3%, insulation is more than 5 minutes;
F. press conventional cast technology casting.
2. automobile brake disc according to claim 1 is characterized in that with the preparation method of matrix material described refining agent is NaCl, MgCl
2, CaCl
2, KCl, CaF
2, NaF or Na
3AlF
6
3. automobile brake disc according to claim 1 is characterized in that with the preparation method of matrix material described alterant is Sr, Ti, K
2TiF
6, KBF
4In one or more combination.
4. the automobile brake disc matrix material with the described method preparation of claim 1 is characterized in that it being with generated in-situ Mg in the casting solidification process
2The disperse of Si enhanced granule is distributed in the alloy matrix aluminum that contains Si, Cu and forms, and its component weight percent content is: Mg
2Si15-35%, Si1-15%, Cu1-5%, Al surplus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031271456A CN100406598C (en) | 2003-09-12 | 2003-09-12 | Composite material for automobile brake disc and its preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031271456A CN100406598C (en) | 2003-09-12 | 2003-09-12 | Composite material for automobile brake disc and its preparing method |
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| Publication Number | Publication Date |
|---|---|
| CN1492066A CN1492066A (en) | 2004-04-28 |
| CN100406598C true CN100406598C (en) | 2008-07-30 |
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| CNB031271456A Expired - Fee Related CN100406598C (en) | 2003-09-12 | 2003-09-12 | Composite material for automobile brake disc and its preparing method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100365314C (en) * | 2006-02-27 | 2008-01-30 | 西安交通大学 | Aluminium-base friction material for brake disc of automobile and its prepn process |
| CN103060641B (en) * | 2011-10-24 | 2015-03-11 | 贵州华科铝材料工程技术研究有限公司 | Carbonyl compound Ni(CO)4 modified high-performance aluminum alloy material and preparation method thereof |
| CN102747258A (en) * | 2012-07-14 | 2012-10-24 | 广东罗翔铝业有限公司 | Production process of high-strength high-plasticity aluminum alloy material |
| CN103924136B (en) * | 2014-04-18 | 2016-06-08 | 吉林万丰奥威汽轮有限公司 | A kind of aluminum alloy for automobile wheel hub material |
| CN106435240A (en) * | 2016-11-24 | 2017-02-22 | 佛山市吉力达铝材科技有限公司 | Preparation method for refining agent |
| KR102463468B1 (en) * | 2017-12-12 | 2022-11-04 | 현대자동차주식회사 | Aluminium alloy for die casting |
| CN108547887B (en) * | 2018-04-12 | 2020-05-01 | 北京天宜上佳高新材料股份有限公司 | Inorganic salt reinforced aluminum alloy composite material, self-cooling brake disc prepared from inorganic salt reinforced aluminum alloy composite material and preparation method |
| CN109609800A (en) * | 2018-12-28 | 2019-04-12 | 广西柳州银海铝业股份有限公司 | The production method of interior 5052 aluminium alloy flat bloom of raw two-phase |
| CN110714176B (en) * | 2019-11-06 | 2020-12-29 | 天津大学 | Heat treatment method capable of realizing rapid aging of aluminum alloy |
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| US5217546A (en) * | 1988-02-10 | 1993-06-08 | Comalco Aluminum Limited | Cast aluminium alloys and method |
| US5484492A (en) * | 1989-08-09 | 1996-01-16 | Comalco Aluminum Limited | Al-Si alloys and method of casting |
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| US5484492A (en) * | 1989-08-09 | 1996-01-16 | Comalco Aluminum Limited | Al-Si alloys and method of casting |
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| CN1492066A (en) | 2004-04-28 |
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Assignee: Wenzhou Tianhe Automobile Parts Co., Ltd. Assignor: Jilin University Contract fulfillment period: 2008.8.30 to 2013.9.30 contract change Contract record no.: 2009330001214 Denomination of invention: Composite material for automobile brake disc and its preparing method Granted publication date: 20080730 License type: Exclusive license Record date: 2009.5.26 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.30 TO 2013.9.30; CHANGE OF CONTRACT Name of requester: WENZHOU TIANHE CAR PARTS CO., LTD. Effective date: 20090526 |
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