CN103774001A - High-impact-toughness aluminum alloy material for hubs and preparation method thereof - Google Patents
High-impact-toughness aluminum alloy material for hubs and preparation method thereof Download PDFInfo
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- CN103774001A CN103774001A CN201410010376.0A CN201410010376A CN103774001A CN 103774001 A CN103774001 A CN 103774001A CN 201410010376 A CN201410010376 A CN 201410010376A CN 103774001 A CN103774001 A CN 103774001A
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Abstract
The invention discloses a high-impact-toughness aluminum alloy material for hubs. The aluminum alloy material comprises the following chemical element components in percentage by mass: 11.2-11.5% of silicon, 1.0-1.3% of magnesium, 0.12-0.15% of copper, 0.2-0.5% of titanium, 0.05-0.08% of strontium, 0.02-0.04% of lanthanum, 0.02-0.05% of cerium, 0.12-0.16% of Ta, 0.12-0.16% of Er, and the balance of aluminum. As the aluminum alloy material contains elements such as titanium, strontium, lanthanum, cerium, Ta and Er, the crystalline grain is refined, the alloy is refined and purified, the alloy strength and the impact resistance are improved, and the finished product rate is increased; by reasonably controlling the post-casting treatment temperature and feeding the alloy elements in different batches, the alloy is uniform in crystallization and high in strength; as a part of waste aluminum is used as a raw material, the alloy is stable and uniform in quality. The aluminum alloy is good in casting and forging property, good in heat conduction and good in impact toughness when being used for manufacturing the hubs, and the hubs are not immediately broken when being subjected to great collision.
Description
Technical field
The present invention relates to aluminum alloy materials field, relate in particular to a kind of wheel hub high impact toughness aluminum alloy materials 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 a kind of wheel hub high impact toughness aluminum alloy materials and preparation method thereof, this aluminum alloy materials has high, the impact-resistant advantage of intensity.
Technical scheme of the present invention is as follows:
A kind of wheel hub high impact toughness aluminum alloy materials, is characterized in that: chemical element composition and mass percent thereof that it contains are: silicon 11.2-11.5, magnesium 1.0-1.3, copper 0.12-0.15, titanium 0.2-0.5, strontium 0.05-0.08, lanthanum 0.02-0.04, cerium 0.02-0.05, Ta0.12-0.16, Er0.12-0.16, surplus are aluminium.
The production method of high impact toughness aluminum alloy materials for described wheel hub, is characterized in that:
(1), preparing fine aluminium ingot and aluminium scrap originates as aluminum matrix in 1:0.4-0.7 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, magnesium, Ta; (2) copper, lanthanum, cerium; (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 270-280 ℃ by room temperature with 230-240 ℃/h of speed, insulation 30-40 minute, be warming up to 430-440 ℃ with 230-240 ℃/h of speed again, insulation 30-40 minute, be warming up to 550-560 ℃ with 230-240 ℃/h of speed again, insulation 6-7 hour; Be cooled to 100-120 ℃ with 70-80 ℃ of clear water, then naturally cool to room temperature; Be warming up to 170-180 ℃ 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 present invention has added the elements such as titanium, strontium, lanthanum, cerium, Ta, Er, refinement crystal grain, refining has purified alloy, has improved alloy strength and shock-resistance, and has improved yield rate; Aluminium alloy of the present invention, by rationally controlling casting post-processing temperature, is thrown in alloying element in batches, makes alloy crystallization even, and intensity is high, and using part aluminium scrap is raw material, makes more stable uniform of alloy quality.This aluminium alloy is used for making wheel hub, and casting and forgeability are good, and thermal conductivity is good, and impelling strength is good, also can not rupture immediately even if run into great shock.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 the resistance to air loss of foundry goods is high, and yield rate is high.
Embodiment
A kind of wheel hub high impact toughness aluminum alloy materials, chemical element composition and mass percent thereof that it contains are: silicon 11.2-11.5, magnesium 1.0-1.3, copper 0.12-0.15, titanium 0.2-0.5, strontium 0.05-0.08, lanthanum 0.02-0.04, cerium 0.02-0.05, Ta0.12-0.16, Er0.12-0.16, surplus are aluminium.
Described wheel hub by the production method of high impact toughness aluminum alloy materials is:
(1), preparing fine aluminium ingot and aluminium scrap originates as aluminum matrix in 1:0.5 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, magnesium, Ta; (2) copper, lanthanum, cerium; (3) other remaining components; The each batch of timed interval of dropping into element is 22 minutes, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 275 ℃ by room temperature with 235 ℃/h of speed, be incubated 35 minutes, then be warming up to 435 ℃ with 235 ℃/h of speed, be incubated 35 minutes, then be warming up to 555 ℃ with 235 ℃/h of speed, be incubated 6.5 hours; Be cooled to 110 ℃ with 75 ℃ of clear water, then naturally cool to room temperature; Be warming up to 175 ℃ 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.
The present embodiment wheel hub is used high impact toughness aluminum alloy materials after tested, and under room temperature, tensile strength б b is 307Mpa, and the tensile strength under 315 ℃ of conditions is 190MPa, yield strength 265MPa, and hardness value HB is 86, unit elongation δ 5 is 14.5%.
Claims (3)
1. a wheel hub high impact toughness aluminum alloy materials, is characterized in that: chemical element composition and mass percent thereof that it contains are: silicon 11.2-11.5, magnesium 1.0-1.3, copper 0.12-0.15, titanium 0.2-0.5, strontium 0.05-0.08, lanthanum 0.02-0.04, cerium 0.02-0.05, Ta0.12-0.16, Er0.12-0.16, surplus are aluminium.
2. the production method of high impact toughness aluminum alloy materials for wheel hub according to claim 1, is characterized in that:
(1), preparing fine aluminium ingot and aluminium scrap originates as aluminum matrix in 1:0.4-0.7 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, magnesium, Ta; (2) copper, lanthanum, cerium; (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 high impact toughness aluminum alloy materials for wheel hub according to claim 2, it is characterized in that: described casting postheat treatment is: be first warming up to 270-280 ℃ by room temperature with 230-240 ℃/h of speed, insulation 30-40 minute, be warming up to 430-440 ℃ with 230-240 ℃/h of speed again, insulation 30-40 minute, be warming up to 550-560 ℃ with 230-240 ℃/h of speed again, insulation 6-7 hour; Be cooled to 100-120 ℃ with 70-80 ℃ of clear water, then naturally cool to room temperature; Be warming up to 170-180 ℃ with 200-220 ℃/h of speed again, insulation 3-4 hour, takes out air cooling and get final product.
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| CN201410010376.0A CN103774001A (en) | 2014-01-09 | 2014-01-09 | High-impact-toughness aluminum alloy material for hubs and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110343883A (en) * | 2019-06-24 | 2019-10-18 | 广东省材料与加工研究所 | A kind of high tough cast Al-Si alloy and its aluminium scrap regeneration method |
| US10781507B2 (en) | 2016-04-01 | 2020-09-22 | Jiangsu University | Anti-fatigue in-situ aluminum-based composite material for heavy-load hubs and preparation method therefor |
Citations (5)
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| GB618700A (en) * | 1946-11-09 | 1949-02-25 | Tennyson Fraser Bradbury | A new aluminium base alloy |
| CN102363211A (en) * | 2011-10-10 | 2012-02-29 | 陈伟军 | Extrusion casting method for aluminum alloy automobile speed changing box shell |
| KR20120039097A (en) * | 2010-10-15 | 2012-04-25 | 한국기계연구원 | A aluminum casting alloy and a manufacturing method therefor |
| FR2969176A1 (en) * | 2010-12-15 | 2012-06-22 | Peugeot Citroen Automobiles Sa | Manufacturing part e.g. cylindrical casing of motor vehicle, comprises molding aluminum-silicon-copper alloy in mold, removing molded part, placing molded part in heat treatment furnace, and quenching molded part at a given temperature |
| CN102676855A (en) * | 2011-03-11 | 2012-09-19 | 赵凯志 | Method for preparing high magnesium aluminium alloy ingot used for forging hubs |
-
2014
- 2014-01-09 CN CN201410010376.0A patent/CN103774001A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB618700A (en) * | 1946-11-09 | 1949-02-25 | Tennyson Fraser Bradbury | A new aluminium base alloy |
| KR20120039097A (en) * | 2010-10-15 | 2012-04-25 | 한국기계연구원 | A aluminum casting alloy and a manufacturing method therefor |
| FR2969176A1 (en) * | 2010-12-15 | 2012-06-22 | Peugeot Citroen Automobiles Sa | Manufacturing part e.g. cylindrical casing of motor vehicle, comprises molding aluminum-silicon-copper alloy in mold, removing molded part, placing molded part in heat treatment furnace, and quenching molded part at a given temperature |
| CN102676855A (en) * | 2011-03-11 | 2012-09-19 | 赵凯志 | Method for preparing high magnesium aluminium alloy ingot used for forging hubs |
| CN102363211A (en) * | 2011-10-10 | 2012-02-29 | 陈伟军 | Extrusion casting method for aluminum alloy automobile speed changing box shell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10781507B2 (en) | 2016-04-01 | 2020-09-22 | Jiangsu University | Anti-fatigue in-situ aluminum-based composite material for heavy-load hubs and preparation method therefor |
| CN110343883A (en) * | 2019-06-24 | 2019-10-18 | 广东省材料与加工研究所 | A kind of high tough cast Al-Si alloy and its aluminium scrap regeneration method |
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