CN103789577A - High strength and toughness aluminium alloy material for car wheel hubs and preparation method thereof - Google Patents
High strength and toughness aluminium alloy material for car wheel hubs and preparation method thereof Download PDFInfo
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- CN103789577A CN103789577A CN201410010355.9A CN201410010355A CN103789577A CN 103789577 A CN103789577 A CN 103789577A CN 201410010355 A CN201410010355 A CN 201410010355A CN 103789577 A CN103789577 A CN 103789577A
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Abstract
The invention provides a high strength and toughness aluminium alloy material for car wheel hubs. The aluminium alloy material comprises the following chemical elements by mass percent: 1.2-1.5% of silicon, 1.2-1.5% of magnesium, 1.2-1.5% of copper, 1.2-1.5% of manganese, 1.2-1.5% of titanium, 1.2-1.5% of nickel, 1.2-1.5% of strontium, 1.2-1.5% of lanthanum, 0.12-0.16% of Tm and the balance of aluminium. The aluminium alloy material has the beneficial effects that as the elements such as titanium, strontium, lanthanum and the like are added to the aluminium alloy, grains are refined, the yield strength, tensile strength and wear resistance are improved, and simultaneously, the thermal conductivity is good; by reasonably controlling the treatment temperature after casting and putting alloy elements in batches, the alloy is uniform in crystallization and has high strength; part of waste aluminium is used as the raw material, so that the alloy has more stable and uniform quality; the aluminium alloy has good casting and forging performances, is suitable for manufacturing car wheel hubs and is durable in use; 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 a kind of high tough aluminum alloy materials and preparation method thereof for automotive hub.
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 high tough aluminum alloy materials and preparation method thereof for automotive hub, this aluminum alloy materials has advantages of that yield strength is high, tensile strength is high, wear resistance is good, thermal conductivity is good.
Technical scheme of the present invention is as follows:
A kind of high tough aluminum alloy materials for automotive hub, is characterized in that: chemical element composition and mass percent thereof that it contains are: silicon 1.2-1.5, magnesium 1.2-1.5, copper 1.2-1.5, manganese 1.2-1.5, titanium 1.2-1.5, nickel 1.2-1.5, strontium 1.2-1.5, lanthanum 1.2-1.5, Tm0.12-0.16, surplus are aluminium.
The production method of high tough aluminum alloy materials for described automotive 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, manganese, copper; (2) titanium, nickel, Tm; (3) other remaining components; The each batch of timed interval of dropping into element is 21-24 minute, after feeding intake, stirs.
Described casting postheat treatment is: be first warming up to 250-260 ℃ by room temperature with 220-230 ℃/h of speed, insulation 30-50 minute, be warming up to 420-430 ℃ with 220-230 ℃/h of speed again, insulation 30-40 minute, be warming up to 540-550 ℃ with 220-230 ℃/h of speed again, insulation 6-7 hour; Be cooled to 110-120 ℃ with 70-80 ℃ of clear water, then naturally cool to room temperature; Be warming up to 150-160 ℃ with 170-180 ℃/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
Aluminium alloy of the present invention has added the elements such as titanium, strontium, lanthanum, refinement crystal grain, increased yield strength, tensile strength and wear resistance, simultaneously thermal conductivity is good; By reasonable control casting post-processing temperature, throw in alloying element in batches, make alloy crystallization even, intensity is high, and using part aluminium scrap is raw material, makes more stable uniform of alloy quality.This aluminium alloy casting and forgeability are good, for making automotive hub, surface-brightening is durable in use.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
A kind of high tough aluminum alloy materials for automotive hub, chemical element composition and mass percent thereof that it contains are: silicon 1.2-1.5, magnesium 1.2-1.5, copper 1.2-1.5, manganese 1.2-1.5, titanium 1.2-1.5, nickel 1.2-1.5, strontium 1.2-1.5, lanthanum 1.2-1.5, Tm0.12-0.16, surplus are aluminium.
Described automotive hub by the production method of high tough 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, manganese, copper; (2) titanium, nickel, Tm; (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 255 ℃ by room temperature with 225 ℃/h of speed, be incubated 40 minutes, then be warming up to 425 ℃ with 225 ℃/h of speed, be incubated 35 minutes, then be warming up to 545 ℃ with 225 ℃/h of speed, be incubated 6.5 hours; Be cooled to 115 ℃ with 75 ℃ of clear water, then naturally cool to room temperature; Be warming up to 155 ℃ with 175 ℃/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 automotive hub with high tough aluminum alloy materials after tested, under room temperature, tensile strength б b is 304Mpa, the tensile strength under 315 ℃ of conditions is 186MPa, yield strength 268MPa, hardness value HB is 84, unit elongation δ 5 is 14.3%.
Claims (3)
1. a high tough aluminum alloy materials for automotive hub, is characterized in that: chemical element composition and mass percent thereof that it contains are: silicon 1.2-1.5, magnesium 1.2-1.5, copper 1.2-1.5, manganese 1.2-1.5, titanium 1.2-1.5, nickel 1.2-1.5, strontium 1.2-1.5, lanthanum 1.2-1.5, Tm0.12-0.16, surplus are aluminium.
2. the production method of high tough aluminum alloy materials for automotive 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, manganese, copper; (2) titanium, nickel, Tm; (3) other remaining components; The each batch of timed interval of dropping into element is 21-24 minute, after feeding intake, stirs.
3. the production method of high tough aluminum alloy materials for automotive hub according to claim 2, it is characterized in that: described casting postheat treatment is: be first warming up to 250-260 ℃ by room temperature with 220-230 ℃/h of speed, insulation 30-50 minute, be warming up to 420-430 ℃ with 220-230 ℃/h of speed again, insulation 30-40 minute, be warming up to 540-550 ℃ with 220-230 ℃/h of speed again, insulation 6-7 hour; Be cooled to 110-120 ℃ with 70-80 ℃ of clear water, then naturally cool to room temperature; Be warming up to 150-160 ℃ with 170-180 ℃/h of speed again, insulation 3-4 hour, takes out air cooling and get final product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410010355.9A CN103789577A (en) | 2014-01-09 | 2014-01-09 | High strength and toughness aluminium alloy material for car wheel hubs and preparation method thereof |
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| CN201410010355.9A CN103789577A (en) | 2014-01-09 | 2014-01-09 | High strength and toughness aluminium alloy material for car wheel hubs and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695623A (en) * | 2017-09-23 | 2018-02-16 | 安徽福斯特铝制品股份有限公司 | High intensity, the automotive hub manufacture craft of high-cooling property |
| CN111471846A (en) * | 2020-05-09 | 2020-07-31 | 安徽拓普勒汽车科技有限公司 | Heat treatment process for aluminum alloy hub |
| WO2021092738A1 (en) * | 2019-11-12 | 2021-05-20 | 常德菲尔美化工技术有限公司 | Aluminum alloy material and manufacturing method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2014
- 2014-01-09 CN CN201410010355.9A patent/CN103789577A/en active Pending
Patent Citations (4)
| 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 |
| CN102363211A (en) * | 2011-10-10 | 2012-02-29 | 陈伟军 | Extrusion casting method for aluminum alloy automobile speed changing box shell |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695623A (en) * | 2017-09-23 | 2018-02-16 | 安徽福斯特铝制品股份有限公司 | High intensity, the automotive hub manufacture craft of high-cooling property |
| WO2021092738A1 (en) * | 2019-11-12 | 2021-05-20 | 常德菲尔美化工技术有限公司 | Aluminum alloy material and manufacturing method therefor |
| CN111471846A (en) * | 2020-05-09 | 2020-07-31 | 安徽拓普勒汽车科技有限公司 | Heat treatment process for aluminum alloy hub |
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