CN104862547A - High-strength aluminum alloy material for engine cylinder cover and manufacturing method of material - Google Patents
High-strength aluminum alloy material for engine cylinder cover and manufacturing method of material Download PDFInfo
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Abstract
The invention discloses a high-strength aluminum alloy material for an engine cylinder cover. The high-strength aluminum alloy material is characterized by being composed of, by mass, 45% to 50% of scrap aluminum master alloyed powder, 7% to 7.5% of silicon, 1% to 1.2% of zinc, 0.2% to 0.25% of magnesium, 0.1% to 0.3% of titanium, 0.01% to 0.02% of strontium, 0.01% to 0.015% of boron, and the remaining being aluminum. A smelting process is simple and easy to operate, and complex operation equipment is not needed in the process; and the material has generality and is beneficial to popularization. Alloy components are optimized, and a scientific and reasonable heat treatment process is adopted, so that the mechanical property, especially the high-temperature mechanical property, of the alloy can be improved; the stability of a strengthening phase can be improved, precipitation and growth of the strengthening phase can be prevented, and the impact resistance of the alloy is improved; and the high-strength aluminum alloy material can be used for manufacturing the engine cylinder cover.
Description
Technical field
The present invention relates to field of aluminum alloys, particularly a kind of engine cylinder cover high-strength aluminum alloy material and preparation method thereof.
Background technology
Cast aluminium alloy has that specific volume is little, intensity is high, cast form is good and processing characteristics is excellent, the coefficient of expansion is little and the series of advantages such as good fluidity, is widely used in the industries such as automobile, Aeronautics and Astronautics and household electrical appliances.Current domestic and international most of Cylinder-Block, cylinder cap adopt aldural to produce substantially, because the weight of automobile often reduces, its oil consumption can reduce 0.6%-1%.In order to reduce fuel consumption, simultaneously also in order to reduce the pollution of motor vehicle exhaust to atmospheric environment, alleviating automotive dead weight is an important measure.Therefore, automobile casting is constantly replaced by lightweight aluminium foundry goods becomes development trend.The material being used as Cylinder-Block cylinder cap mainly contains 328.0 of domestic ZL101, ZL104, ZL702A alloy and the U.S., the A-S5U3 of France, the A4CB aluminium alloy etc. of Japan.Although the aluminum silicon alloy of traditional trade mark can meet service requirements in common use properties, when part is in complicated stressed condition, often there is many weak points.Although as ZL101 alloying constituent is simple, its mechanical property is not high, can only be used for the part that requirement of strength is not high; The thermotolerance of ZL104 is poor etc., therefore has important application value to the research and development of cast aluminium alloy.
Summary of the invention
The object of the present invention is to provide a kind of engine cylinder cover high-strength aluminum alloy material, the scientific and reasonable aluminium alloy formula of a kind of composition proportion is prepared by research, adopt scientific and reasonable thermal treatment process, heavy alloyed mechanical property can be put forward, especially mechanical behavior under high temperature.
In order to realize object of the present invention, the present invention is by following scheme implementation:
A kind of engine cylinder cover high-strength aluminum alloy material, is made up of by mass percentage following each composition: aluminium scrap master alloyed powder 45-50, silicon 7-7.5, zinc 1-1.2, magnesium 0.2-0.25, titanium 0.1-0.3, strontium 0.01-0.02, boron 0.01-0.015, surplus are aluminium;
Described aluminium scrap master alloyed powder is made up of the raw material of following weight part: aluminium scrap bits 60-65, manganese 15-18, copper 10-12, chromium 6-8, zirconium 7-9, Graphite Powder 99 2-3, sodium-chlor 1.5-2, cryolite powder 1-1.5; Preparation method is: aluminium scrap bits are first used permanent magnet sucking-off ferrous products wherein by (1), then screens out dust wherein and sand with iron mesh screen, then with the surperficial oil stain of sanitising agent removing, finally puts into oven for drying moisture stand-by; (2) aluminium scrap after surface treatment is added in crucible electrical resistance furnace, be warming up to 850 DEG C until all melt, copper, manganese is pressed into bell jar when being then cooled to 760 DEG C-770 DEG C, be incubated 30 minutes, continue adjusting furnace temperature to 740 DEG C-750 DEG C, press-in chromium, zirconium, after stirring, insulation leaves standstill 20 minutes; (3) when furnace temperature reaches 730 DEG C, join in molten metal by Graphite Powder 99, sodium-chlor, cryolite powder, leave standstill after stirring, insulation leaves standstill 40 minutes; (4) after taking off removing dross, molten metal is poured in powder by gas-atomization equipment, be prepared into the powder of particle diameter below 100 μm and get final product.
A kind of engine cylinder cover high-strength aluminum alloy material of the present invention, is prepared from by following concrete steps:
(1) all the components except aluminium scrap master alloyed powder is made fine powder separately for subsequent use, all instruments and mould are carried out and thermal treatment under 250 DEG C of conditions, for subsequent use;
(2) aluminium powder is added in crucible electrical resistance furnace, be warming up to aluminium powder and melt rear rapid temperature increases to 820 DEG C completely, then with bell jar silica flour be pressed into aluminium liquid at twice and stir gently, until reduce furnace temperature rapidly after all melting, 760 DEG C-780 DEG C time, be pressed into aluminium scrap master alloyed powder, insulation 40-60 minute, continue adjusting furnace temperature to 730 DEG C-740 DEG C, be pressed into all the other remaining components, after stirring, insulation leaves standstill 30 minutes;
(3) the refining agent bell jar press-in molten metal intermediate altitude place of quality of molten metal 2-3% will be accounted for, slowly make circumference and become banking motion, molten metal is evenly rolled, action time is about 8-10 minute, after static 5 minutes, then carry out refining 6-8 minute by argon gas, leave standstill 20 minutes, skim again, sampling analysis after skimming;
(4) after aluminium alloy qualified for composition being left standstill 10-20 minute, aluminium alloy is poured in the mould of preheating, take out after cooling, (processing condition are: solution treatment is 500 DEG C to adopt T6 thermal treatment process, 5.5 hour, ageing treatment is 180 DEG C, 5 hours) heat-treat, finally obtain product of the present invention.
The preparation method of a kind of engine cylinder cover high-strength aluminum alloy material of the present invention, described refining agent is made up of the raw material of following weight part: Sodium Fluoride 13-16, SODIUMNITRATE 18-22, carbon dust 9-11, boron trioxide 9-10, potassium fluotitanate 15-18, sodium bicarbonate 10-13, hexafluoro sodium aluminate 2-4, sodium-chlor 8-10, light fire brick 6-8; Preparation method is: (1) is put into high-temperature electric resistance furnace after Sodium Fluoride, SODIUMNITRATE, sodium-chlor, potassium fluotitanate being mixed and melted, then cooled and solidified, then is broken into 200 order mixed powder A; (2) by jointly putting into pulverizer after light fire brick fragmentation with all the other remaining components except sodium bicarbonate, to be ground into 200 order mixed powder B stand-by; (3) mixed powder A is mixed with mixed powder B, after adding sodium bicarbonate, put into extruding granulator granulation; (4) by particle dry 120-150 minute in an oven, temperature controls at 230-240 DEG C, cools rear taking-up and get final product.
The invention has the beneficial effects as follows: the present invention adopts the element meltings such as aluminium scrap bits and manganese, copper, chromium to make aluminium scrap master alloyed powder, the new aluminium of Substitute For Partial is as principal element, heavy alloyed intensity and wear resistance can be put forward, and use aluminium scrap bits composition, reduce production cost; The refining agent that a kind of special process is made is added in castingprocesses, for porous material, be beneficial to formation negative pressure, can react by gas fully and in molten metal, thus reach degassed effect, simultaneously can material in separating metal slag, and impurity in decompose slag, make scraps dryness and loose, easily take off slagging-off, prevent molten metal secondary suction and oxidation.
Fusion process of the present invention is simple to operation, technique does not need complicated operating equipment, and technique is simply convenient to control, and is beneficial to and popularizes; By optimized alloy composition and adopt scientific and reasonable thermal treatment process, heavy alloyed mechanical property can not only be put forward, especially mechanical behavior under high temperature; And the stability of strengthening phase can be improved, stop the precipitation of strengthening phase and grow up, putting forward heavy alloyed shock resistance, the present invention can be used for making engine cylinder cap.
Embodiment
Below by specific examples, the present invention is described in detail.
A kind of engine cylinder cover high-strength aluminum alloy material, is made up of by mass percentage following each composition: aluminium scrap master alloyed powder 45, silicon 7, zinc 1, magnesium 0.2, titanium 0.1, strontium 0.01, boron 0.01, surplus are aluminium;
Described aluminium scrap master alloyed powder is made up of the raw material of following weight part (kilogram): aluminium scrap bits 60, manganese 15, copper 10, chromium 6, zirconium 7, Graphite Powder 99 2, sodium-chlor 1.5, cryolite powder 1; Preparation method is: aluminium scrap bits are first used permanent magnet sucking-off ferrous products wherein by (1), then screens out dust wherein and sand with iron mesh screen, then with the surperficial oil stain of sanitising agent removing, finally puts into oven for drying moisture stand-by; (2) aluminium scrap after surface treatment is added in crucible electrical resistance furnace, be warming up to 850 DEG C until all melt, copper, manganese is pressed into bell jar when being then cooled to 760 DEG C-770 DEG C, be incubated 30 minutes, continue adjusting furnace temperature to 740 DEG C-750 DEG C, press-in chromium, zirconium, after stirring, insulation leaves standstill 20 minutes; (3) when furnace temperature reaches 730 DEG C, join in molten metal by Graphite Powder 99, sodium-chlor, cryolite powder, leave standstill after stirring, insulation leaves standstill 40 minutes; (4) after taking off removing dross, molten metal is poured in powder by gas-atomization equipment, be prepared into the powder of particle diameter below 100 μm and get final product.
A kind of engine cylinder cover high-strength aluminum alloy material of the present invention, is prepared from by following concrete steps:
(1) all the components except aluminium scrap master alloyed powder is made fine powder separately for subsequent use, all instruments and mould are carried out and thermal treatment under 250 DEG C of conditions, for subsequent use;
(2) aluminium powder is added in crucible electrical resistance furnace, be warming up to aluminium powder and melt rear rapid temperature increases to 820 DEG C completely, then with bell jar silica flour be pressed into aluminium liquid at twice and stir gently, until reduce furnace temperature rapidly after all melting, 760 DEG C-780 DEG C time, be pressed into aluminium scrap master alloyed powder, be incubated 40 minutes, continuation adjusting furnace temperature to 730 DEG C-740 DEG C, be pressed into all the other remaining components, after stirring, insulation leaves standstill 30 minutes;
(3) the refining agent bell jar press-in molten metal intermediate altitude place of quality of molten metal 3% will be accounted for, slowly make circumference and become banking motion, molten metal is evenly rolled, about 8 minutes action time, after static 5 minutes, then carry out refining 6 minutes by argon gas, leave standstill 20 minutes, skim again, sampling analysis after skimming;
(4) after aluminium alloy qualified for composition being left standstill 10 minutes, aluminium alloy is poured in the mould of preheating, take out after cooling, (processing condition are: solution treatment is 500 DEG C to adopt T6 thermal treatment process, 5.5 hour, ageing treatment is 180 DEG C, 5 hours) heat-treat, finally obtain product of the present invention.
The preparation method of a kind of engine cylinder cover high-strength aluminum alloy material of the present invention, described refining agent is made up of the raw material of following weight part (kilogram): Sodium Fluoride 13, SODIUMNITRATE 18, carbon dust 9, boron trioxide 9, potassium fluotitanate 15, sodium bicarbonate 10, hexafluoro sodium aluminate 2, sodium-chlor 8, light fire brick 6; Preparation method is: (1) is put into high-temperature electric resistance furnace after Sodium Fluoride, SODIUMNITRATE, sodium-chlor, potassium fluotitanate being mixed and melted, then cooled and solidified, then is broken into 200 order mixed powder A; (2) by jointly putting into pulverizer after light fire brick fragmentation with all the other remaining components except sodium bicarbonate, to be ground into 200 order mixed powder B stand-by; (3) mixed powder A is mixed with mixed powder B, after adding sodium bicarbonate, put into extruding granulator granulation; (4) by particle dry 120 minutes in an oven, temperature controls at 230-240 DEG C, taking-up and get final product after cooling.
Diameter is become by Product processing of the present invention to be the standard tensile specimen of 6mm, compare with ZL702A type aluminium alloy, the high-temperature behavior at room-temperature property and 250 DEG C is tested according to GB/T228-2002 " metallic substance tensile testing at ambient temperature " and GB/T4338-2006 " Metal Materials At High Temperature stretching test method ", high-temperature behavior tests 20 minutes, and result is as following table:
Claims (3)
1. an engine cylinder cover high-strength aluminum alloy material, it is characterized in that, be made up of by mass percentage following each composition: aluminium scrap master alloyed powder 45-50, silicon 7-7.5, zinc 1-1.2, magnesium 0.2-0.25, titanium 0.1-0.3, strontium 0.01-0.02, boron 0.01-0.015, surplus are aluminium;
Described aluminium scrap master alloyed powder is made up of the raw material of following weight part: aluminium scrap bits 60-65, manganese 15-18, copper 10-12, chromium 6-8, zirconium 7-9, Graphite Powder 99 2-3, sodium-chlor 1.5-2, cryolite powder 1-1.5; Preparation method is: aluminium scrap bits are first used permanent magnet sucking-off ferrous products wherein by (1), then screens out dust wherein and sand with iron mesh screen, then with the surperficial oil stain of sanitising agent removing, finally puts into oven for drying moisture stand-by; (2) aluminium scrap after surface treatment is added in crucible electrical resistance furnace, be warming up to 850 DEG C until all melt, copper, manganese is pressed into bell jar when being then cooled to 760 DEG C-770 DEG C, be incubated 30 minutes, continue adjusting furnace temperature to 740 DEG C-750 DEG C, press-in chromium, zirconium, after stirring, insulation leaves standstill 20 minutes; (3) when furnace temperature reaches 730 DEG C, join in molten metal by Graphite Powder 99, sodium-chlor, cryolite powder, leave standstill after stirring, insulation leaves standstill 40 minutes; (4) after taking off removing dross, molten metal is poured in powder by gas-atomization equipment, be prepared into the powder of particle diameter below 100 μm and get final product.
2. a kind of engine cylinder cover high-strength aluminum alloy material according to claim 1, is characterized in that, be prepared from by following concrete steps:
(1) all the components except aluminium scrap master alloyed powder is made fine powder separately for subsequent use, all instruments and mould are carried out and thermal treatment under 250 DEG C of conditions, for subsequent use;
(2) aluminium powder is added in crucible electrical resistance furnace, be warming up to aluminium powder and melt rear rapid temperature increases to 820 DEG C completely, then with bell jar silica flour be pressed into aluminium liquid at twice and stir gently, until reduce furnace temperature rapidly after all melting, 760 DEG C-780 DEG C time, be pressed into aluminium scrap master alloyed powder, insulation 40-60 minute, continue adjusting furnace temperature to 730 DEG C-740 DEG C, be pressed into all the other remaining components, after stirring, insulation leaves standstill 30 minutes;
(3) the refining agent bell jar press-in molten metal intermediate altitude place of quality of molten metal 2-3% will be accounted for, slowly make circumference and become banking motion, molten metal is evenly rolled, action time is about 8-10 minute, after static 5 minutes, then carry out refining 6-8 minute by argon gas, leave standstill 20 minutes, skim again, sampling analysis after skimming;
(4) after aluminium alloy qualified for composition being left standstill 10-20 minute, aluminium alloy is poured in the mould of preheating, take out after cooling, (processing condition are: solution treatment is 500 DEG C to adopt T6 thermal treatment process, 5.5 hour, ageing treatment is 180 DEG C, 5 hours) heat-treat, finally obtain product of the present invention.
3. the preparation method of a kind of engine cylinder cover high-strength aluminum alloy material according to claim 2, it is characterized in that, described refining agent is made up of the raw material of following weight part: Sodium Fluoride 13-16, SODIUMNITRATE 18-22, carbon dust 9-11, boron trioxide 9-10, potassium fluotitanate 15-18, sodium bicarbonate 10-13, hexafluoro sodium aluminate 2-4, sodium-chlor 8-10, light fire brick 6-8; Preparation method is: (1) is put into high-temperature electric resistance furnace after Sodium Fluoride, SODIUMNITRATE, sodium-chlor, potassium fluotitanate being mixed and melted, then cooled and solidified, then is broken into 200 order mixed powder A; (2) by jointly putting into pulverizer after light fire brick fragmentation with all the other remaining components except sodium bicarbonate, to be ground into 200 order mixed powder B stand-by; (3) mixed powder A is mixed with mixed powder B, after adding sodium bicarbonate, put into extruding granulator granulation; (4) by particle dry 120-150 minute in an oven, temperature controls at 230-240 DEG C, cools rear taking-up and get final product.
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| CN201510175128.6A CN104862547A (en) | 2015-04-14 | 2015-04-14 | High-strength aluminum alloy material for engine cylinder cover and manufacturing method of material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525156A (en) * | 2016-02-01 | 2016-04-27 | 安徽乾通教育制造有限公司 | Novel aluminum-silicon-copper-magnesium alloy material and preparation method thereof |
| CN106367639A (en) * | 2016-10-09 | 2017-02-01 | 马鸿斌 | High-thermal-conductivity aluminum alloy and preparing method thereof |
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| CN102071341A (en) * | 2010-12-03 | 2011-05-25 | 中国兵器工业第五二研究所 | Cast aluminum-silicon alloy for engine cylinder head and heat treatment process |
| CN103421991A (en) * | 2013-09-04 | 2013-12-04 | 安徽江淮汽车股份有限公司 | Composite metamorphic cast aluminum alloy and preparation method and application thereof |
| CN104265484A (en) * | 2014-08-08 | 2015-01-07 | 含山县全兴内燃机配件有限公司 | Cylinder cover of Yuchai 4105 engine |
| CN104480357A (en) * | 2014-12-05 | 2015-04-01 | 福州大学 | High-silicon aluminum alloy cylinder sleeve and preparation method thereof |
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- 2015-04-14 CN CN201510175128.6A patent/CN104862547A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071341A (en) * | 2010-12-03 | 2011-05-25 | 中国兵器工业第五二研究所 | Cast aluminum-silicon alloy for engine cylinder head and heat treatment process |
| CN103421991A (en) * | 2013-09-04 | 2013-12-04 | 安徽江淮汽车股份有限公司 | Composite metamorphic cast aluminum alloy and preparation method and application thereof |
| CN104265484A (en) * | 2014-08-08 | 2015-01-07 | 含山县全兴内燃机配件有限公司 | Cylinder cover of Yuchai 4105 engine |
| CN104480357A (en) * | 2014-12-05 | 2015-04-01 | 福州大学 | High-silicon aluminum alloy cylinder sleeve and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525156A (en) * | 2016-02-01 | 2016-04-27 | 安徽乾通教育制造有限公司 | Novel aluminum-silicon-copper-magnesium alloy material and preparation method thereof |
| CN106367639A (en) * | 2016-10-09 | 2017-02-01 | 马鸿斌 | High-thermal-conductivity aluminum alloy and preparing method thereof |
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Application publication date: 20150826 |