CN103789582A - Special aluminium-silicon-magnesium alloy material for car wheel hubs and preparation method thereof - Google Patents
Special aluminium-silicon-magnesium alloy material for car wheel hubs and preparation method thereof Download PDFInfo
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- CN103789582A CN103789582A CN201410010377.5A CN201410010377A CN103789582A CN 103789582 A CN103789582 A CN 103789582A CN 201410010377 A CN201410010377 A CN 201410010377A CN 103789582 A CN103789582 A CN 103789582A
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Abstract
The invention provides a special aluminium-silicon-magnesium alloy material for car wheel hubs. The special aluminium-silicon-magnesium alloy material comprises the following chemical elements by mass percent: 5.2-5.5% of silicon, 3.7-4.2% of magnesium, 2.5-2.8% of titanium, 0.6-0.8% of strontium, 2.1-2.3% of Ni, 0.04-0.06% of W, 0.12-0.16% of Tm and the balance of aluminium. The special aluminium-silicon-magnesium alloy material has the beneficial effects that the elements such as titanium, strontium, Ni, W, Tm and the like are added to the formula of the alloy; by reasonably controlling the treatment temperature after casting and putting alloy elements in batches, the alloy is uniform in crystallization, has high strength, good thermal conductivity and good casting and forging performances, is resistant to corrosion and impact and is free from bubbles; the aluminium alloy is suitable for manufacturing wheel hubs of luxury cars, and has smooth surface, high strength and high safety factor after being forged; a refining agent is used for casting production, can reduce the porosity in castings by 1-2 degrees, has about two-grade oxide inclusions, and has high yield.
Description
Technical field
The present invention relates to aluminum alloy materials field, relate in particular to special alsimag material of a kind of car hub and preparation method thereof.
Background technology
The quality of wheel and reliability quality are not only closely related with the safety of vehicle, and with automobile stationarity, comfortableness, safety operation close relation under steam.Thereby require the size and dimension precision of wheel high, and good dynamic balance, fatigue strength is high, perfect heat-dissipating, rigidity and good springiness.Along with the development of automobile, the class of automobile is become better and better, and car speed is more and more faster, and individual requirement is also more and more higher, so also more and more higher to the requirement of automotive hub.
Widely used in China's automobile is conventional aluminium wheel hub, is the entirety forming with die casting, and the shape of product is single, change parameter and the shape of wheel and must change mould; And what conventional cast wheel hub adopted is A356-2 aluminium, A356-2 aluminium, its stability and thermal diffusivity are also poor, and quality is also heavier simultaneously.
In order to solve the problems of the technologies described above, on market, occurred a kind of three-plate aluminum alloy forged hub now, so-called three-chip type wheel hub, is that wheel hub is resolved into anter, middle and rear panel, and then it is combined into a complete wheel hub, but it can meet again the basic parameter of all wheel hubs.This wheel hub is all far superior to conventional cast wheel hub from intensity, quality, thermal diffusivity and profile.
Normal 6 series (aluminium, magnesium, silicon) alloy material that adopts of above-mentioned three-plate aluminum alloy forged hub is produced, but due to the ductility of 6 series (aluminium, magnesium, silicon) alloy material itself not enough, make the retractility of the three-plate aluminum alloy forged hub after producing and automatically fatigue recovery function also do not reach requirement.
Also there are some problems with aluminium alloy in China's wheel hub, as insufficient strength, weight are large, unstable etc. the problem of limited, the casting quality of poor processability, poor radiation, rotten treatment effect, needs further to improve the over-all properties of wheel hub aluminium alloy.
Summary of the invention
The object of the present invention is to provide special alsimag material of a kind of car hub and preparation method thereof, this aluminum alloy materials has that intensity is high, corrosion-resistant, shock-resistant, thermal conductivity is good, without bubble, casting and the good advantage of forgeability.
Technical scheme of the present invention is as follows:
The special alsimag material of a kind of car hub, is characterized in that: chemical element composition and mass percent thereof that it contains are: silicon 5.2-5.5, magnesium 3.7-4.2, titanium 2.5-2.8, strontium 0.6-0.8, Ni2.1-2.3, W0.04-0.06, Tm0.12-0.16, surplus are aluminium.
The production method of the special alsimag material of described car hub, is characterized in that:
(1), preparing fine aluminium ingot and aluminium scrap originates as aluminum matrix in 1:0.2-0.5 ratio, fine aluminium ingot is added to drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add aluminium scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, Tm; (2) magnesium, Ni; (3) other remaining components; The each batch of timed interval of dropping into element is 20-23 minute, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 260-270 ℃ by room temperature with 240-250 ℃/h of speed, insulation 30-40 minute, be warming up to 440-450 ℃ with 240-250 ℃/h of speed again, insulation 30-40 minute, be warming up to 540-550 ℃ with 240-250 ℃/h of speed again, insulation 5-6 hour; Be cooled to 120-130 ℃ with 70-80 ℃ of clear water, then naturally cool to room temperature; Be warming up to 150-160 ℃ with 200-220 ℃/h of speed again, insulation 3-4 hour, takes out air cooling and get final product.
Described refining agent is made up of the raw material of following weight part: aluminium powder 10-12, silicon-dioxide 8-12, attapulgite 8-12, feldspar in powder 5-8, aluminium vanadine 3-4, medical stone 3-4, lapis amiridis 3-4, aluminium nitride 5-6, trees ashes 1-2, Starso 2-3, Calcium Fluoride (Fluorspan) 3-5; Its preparation method is that silicon-dioxide, attapulgite, feldspar in powder, medical stone, aluminium vanadine, trees ashes are mixed, be heated to 1600-1800 ℃, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.
Beneficial effect of the present invention
The elements such as titanium, strontium, Ni, W, Tm in alloy formula of the present invention, are added, by reasonable control casting post-processing temperature, throw in alloying element in batches, make that alloy crystallization is even, intensity is high, corrosion-resistant, shock-resistant, thermal conductivity is good, without bubble, casting and forgeability are good, using part aluminium scrap is raw material, makes more stable uniform of alloy quality.This aluminium alloy is applicable to make high-grade car wheel hub, after forging, and smooth surface, intensity is high, safety coefficient great number.Refining agent of the present invention, for Foundry Production, can make the degree of porosity in foundry goods reduce 1-2 degree, and oxide inclusion is 2 grades of left and right, and yield rate is high.
Embodiment
The special alsimag material of a kind of car hub, chemical element composition and mass percent thereof that it contains are: silicon 5.2-5.5, magnesium 3.7-4.2, titanium 2.5-2.8, strontium 0.6-0.8, Ni2.1-2.3, W0.04-0.06, Tm0.12-0.16, surplus are aluminium.
The production method of the special alsimag material of described car hub, is characterized in that:
(1), preparing fine aluminium ingot and aluminium scrap originates as aluminum matrix in 1:0.3 ratio, fine aluminium ingot is added to drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add aluminium scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, Tm; (2) magnesium, Ni; (3) other remaining components; The each batch of timed interval of dropping into element is 21 minutes, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 265 ℃ by room temperature with 245 ℃/h of speed, be incubated 35 minutes, then be warming up to 445 ℃ with 245 ℃/h of speed, be incubated 35 minutes, then be warming up to 545 ℃ with 245 ℃/h of speed, be incubated 5.5 hours; Be cooled to 125 ℃ with 75 ℃ of clear water, then naturally cool to room temperature; Be warming up to 155 ℃ with 210 ℃/h of speed again, be incubated 3.5 hours, take out air cooling and get final product.
Described refining agent by following weight part (kilogram) raw material make: aluminium powder 10, silicon-dioxide 8, attapulgite 8, feldspar in powder 5, aluminium vanadine 4, medical stone 4, lapis amiridis 3, aluminium nitride 5, trees ashes 1, Starso 2, Calcium Fluoride (Fluorspan) 5; Its preparation method is that silicon-dioxide, attapulgite, feldspar in powder, medical stone, aluminium vanadine, trees ashes are mixed, be heated to 1600-1800 ℃, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.
After tested, under room temperature, tensile strength б b is 317Mpa to the special alsimag material of the present embodiment car hub, and the tensile strength under 315 ℃ of conditions is 200MPa, yield strength 275MPa, and hardness value HB is 90, unit elongation δ 5 is 15%.
Claims (3)
1. the special alsimag material of car hub, is characterized in that: chemical element composition and mass percent thereof that it contains are: silicon 5.2-5.5, magnesium 3.7-4.2, titanium 2.5-2.8, strontium 0.6-0.8, Ni2.1-2.3, W0.04-0.06, Tm0.12-0.16, surplus are aluminium.
2. the production method of the special alsimag material of car hub according to claim 1, is characterized in that:
(1), preparing fine aluminium ingot and aluminium scrap originates as aluminum matrix in 1:0.2-0.5 ratio, fine aluminium ingot is added to drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add aluminium scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;
(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, Tm; (2) magnesium, Ni; (3) other remaining components; The each batch of timed interval of dropping into element is 20-23 minute, after feeding intake, stirs.
3. the production method of the special alsimag material of car hub according to claim 2, it is characterized in that: described casting postheat treatment is: be first warming up to 260-270 ℃ by room temperature with 240-250 ℃/h of speed, insulation 30-40 minute, be warming up to 440-450 ℃ with 240-250 ℃/h of speed again, insulation 30-40 minute, be warming up to 540-550 ℃ with 240-250 ℃/h of speed again, insulation 5-6 hour; Be cooled to 120-130 ℃ with 70-80 ℃ of clear water, then naturally cool to room temperature; Be warming up to 150-160 ℃ with 200-220 ℃/h of speed again, insulation 3-4 hour, takes out air cooling and get final product.
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| CN201410010377.5A CN103789582A (en) | 2014-01-09 | 2014-01-09 | Special aluminium-silicon-magnesium alloy material for car wheel hubs and preparation method thereof |
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| CN201410010377.5A CN103789582A (en) | 2014-01-09 | 2014-01-09 | Special aluminium-silicon-magnesium alloy material for car wheel hubs and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084588A (en) * | 2014-06-06 | 2014-10-08 | 马鞍山市恒毅机械制造有限公司 | High-strength powder metallurgical hub bearing unit |
| CN104212987A (en) * | 2014-09-19 | 2014-12-17 | 无锡贺邦金属制品有限公司 | Preparation method of aluminum alloy for casting |
| CN106048313A (en) * | 2016-06-29 | 2016-10-26 | 无锡康柏斯机械科技有限公司 | Aluminum alloy material used for hub and casting method |
| US20180087132A1 (en) * | 2016-09-29 | 2018-03-29 | Samsung Electronics Co., Ltd. | Aluminum alloy for die casting and method for manufacturing the same |
| CN108179329A (en) * | 2017-12-04 | 2018-06-19 | 江苏大学 | A kind of method for improving cast Al-Si alloy rare earth elements microalloying effect |
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| CN102365379A (en) * | 2009-03-31 | 2012-02-29 | 日立金属株式会社 | Al-Mg-Si-type aluminum alloy for casting which has excellent bearing force, and casted member comprising same |
| CN102363211A (en) * | 2011-10-10 | 2012-02-29 | 陈伟军 | Extrusion casting method for aluminum alloy automobile speed changing box shell |
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2014
- 2014-01-09 CN CN201410010377.5A patent/CN103789582A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102365379A (en) * | 2009-03-31 | 2012-02-29 | 日立金属株式会社 | Al-Mg-Si-type aluminum alloy for casting which has excellent bearing force, and casted member comprising same |
| CN102363211A (en) * | 2011-10-10 | 2012-02-29 | 陈伟军 | Extrusion casting method for aluminum alloy automobile speed changing box shell |
Non-Patent Citations (1)
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| 饶启昌等: "耐磨材料热处理问题的探讨", 《水利电力机械》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084588A (en) * | 2014-06-06 | 2014-10-08 | 马鞍山市恒毅机械制造有限公司 | High-strength powder metallurgical hub bearing unit |
| CN104084588B (en) * | 2014-06-06 | 2016-08-24 | 安徽吉思特智能装备有限公司 | A kind of high-strength powder metallurgical hub-bearing unit |
| CN104212987A (en) * | 2014-09-19 | 2014-12-17 | 无锡贺邦金属制品有限公司 | Preparation method of aluminum alloy for casting |
| CN106048313A (en) * | 2016-06-29 | 2016-10-26 | 无锡康柏斯机械科技有限公司 | Aluminum alloy material used for hub and casting method |
| US20180087132A1 (en) * | 2016-09-29 | 2018-03-29 | Samsung Electronics Co., Ltd. | Aluminum alloy for die casting and method for manufacturing the same |
| CN108179329A (en) * | 2017-12-04 | 2018-06-19 | 江苏大学 | A kind of method for improving cast Al-Si alloy rare earth elements microalloying effect |
| CN108179329B (en) * | 2017-12-04 | 2020-01-03 | 江苏大学 | Method for improving microalloying effect of rare earth elements in cast aluminum-silicon alloy |
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Application publication date: 20140514 |