CN101660074A - Modifier for high-strength aluminum alloy and use method thereof - Google Patents
Modifier for high-strength aluminum alloy and use method thereof Download PDFInfo
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- CN101660074A CN101660074A CN200910144933A CN200910144933A CN101660074A CN 101660074 A CN101660074 A CN 101660074A CN 200910144933 A CN200910144933 A CN 200910144933A CN 200910144933 A CN200910144933 A CN 200910144933A CN 101660074 A CN101660074 A CN 101660074A
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- alterant
- rare earth
- aluminium liquid
- modifier
- strontium
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Abstract
The invention discloses a modifier for a high-strength aluminum alloy and a use method thereof, wherein the modifier comprises the following components in percentage by weight: 10-15 percent of rare earth, 3-7 percent of strontium, 6.5-8.5 percent of silicon, and the balance of aluminum. Compared with the prior art, the modifier is a multi-modifier of the rare earth and the strontium and generatesdouble modification, besides, the functions of the rare earth are utilized to play refining, degassing, weeding and grain refining roles to molten aluminum, thus leading the performance of the aluminum alloy, particularly the strength thereof, to be further improved.
Description
Technical field
The invention belongs to the alterant and the using method thereof of hypoeutectic al-si alloy, belong to the alterant and the using method thereof of long lasting hypoeutectic al-si alloy especially.
Background technology
Diecasting aluminum-silicon alloy has light weight, castability, mechanical property and outward appearance preferably, is widely used in all trades and professions, especially automobile industry.But aluminium diecast alloy under normal circumstances silicon metal is to exist with lamellar morphology, and strength property is lower, for the strength property that makes aluminium alloy increases substantially, must handle making flaky Eutectic Silicon in Al-Si Cast Alloys be transformed into fibrous Eutectic Silicon in Al-Si Cast Alloys through alterant.
Alterant commonly used is sodium salt degeneration agent and strontium salt alterant: the rotten working lipe of sodium salt degeneration agent is shorter, and the metamorphism time can only keep about half an hour, is not suitable for the long cast of continuous production with the die casting industry; The deteriorating time of strontium alterant is long, exposes outside because aluminium liquid is secular, and very easily oxygen uptake, oxidizing reaction very easily takes place in strontium in the alterant and oxygen, causes rotten decline, and the quality of die casting can not get effective assurance.
Summary of the invention:
First technical problem to be solved by this invention provides a kind of polybasic composite inoculating matter, not only aluminium diecast alloy is played long-acting modification effect, and can also crystal grain thinning, further improves strength property.
Second using method that technical problem is above-mentioned alterant to be solved by this invention
The technical scheme that the present invention deals with problems is: a kind of alterant of aluminum silicon alloy comprises following component and concentration expressed in percentage by weight: rare earth 10-15, and strontium 3-7%, silicon 6.5-8.5%, all the other are aluminium.
For further thinning microstructure, improve the intensity of aluminium alloy, also adding concentration expressed in percentage by weight in the agent on the turn is the titanium of 0.5-1%.
Described rare earth is a Baotou rare earth.
Its rotten method is: aluminium liquid with the melting of non-iron crucible to 720-750 ℃, after the degasification refining, to add in the aluminium liquid through the alterant that accounts for the heavy 1-1.5% of aluminium liquid of preheating, finish with pressing spoon that alterant is pressed into to the aluminium liquid at 20-50mm place, crucible bottom, melting fully to alterant.Because rare earth can produce certain boiling in aluminium liquid, reduced the incubation period of alterant, behind rotten the finishing, can carry out die casting production after skimming.
Through facts have proved, during in 720-750 ℃, the compound modifier of rare earth and strontium is to best modification effect in temperature.
Strontium is a kind of long lasting alterant for aluminium alloy, and deteriorating time can reach more than 10 hours, and the content in aluminium liquid reaches 0.02% and just has metamorphism when above.But the rotten incubation period of strontium is longer, need be incubated half an hour at a certain temperature and just can play modification effect when above; Simultaneously strontium is a kind of more active metallic element, very easily reacts with oxygen and fails.
Therefore rare earth has very high chemically reactive and bigger atomic radius, joins in the aluminium alloy, reaches 0.8% when above when aluminium liquid middle-weight rare earths element wt content, and rare earth acts on below just bringing into play:
1, can crystal grain thinning, play the fining agent effect;
2, prevent segregation, degasification, removal of impurities and purification aluminium liquid, play the effect of refining agent; Remove the oxygen in the aluminium liquid, prevented that the oxidation decay of strontium from producing, thereby improved the long-acting of strontium;
3, improve effects such as metallographic structure, improve mechanical property, physicals and processing characteristics, play rotten effect.
Titanium can strengthen the deaerating effect of rare earth, thereby has improved the deteriorating time of alterant.
The present invention compared with prior art, described alterant is the multielement modificator of rare earth and strontium, produces dual metamorphism, but also utilized the function of rare earth, aluminium liquid is carried out refining, degasification, impurity elimination, and the crystal grain thinning effect, make the performance of aluminium alloy, particularly its intensity is further enhanced.
Embodiment
Below in conjunction with embodiment the present invention is done detailed explanation.
Embodiment 1:
A kind of alterant of aluminum silicon alloy comprises following component and concentration expressed in percentage by weight: rare earth 10%, and strontium 3%, silicon 6.5%, all the other are aluminium.
Embodiment 2:
A kind of alterant of aluminum silicon alloy, it comprises following component and concentration expressed in percentage by weight: rare earth 15%, strontium %, silicon 8.5%, all the other are aluminium.
Embodiment 3:
A kind of alterant of aluminum silicon alloy, it comprises following component and concentration expressed in percentage by weight: rare earth 10%, strontium 5%, the titanium of silicon 7%, 1%, all the other are aluminium.
Embodiment 4:
With the YL112 aluminium liquid for preparing with non-iron crucible melting to 720 ℃, after the degasification refining, to weigh 1% embodiment 1 alterant and add in the aluminium liquid through the aluminium liquid that accounts for of preheating, finish with pressing spoon that alterant is pressed into to the aluminium liquid at 20mm place, crucible bottom, melting to alterant.Because rare earth can produce certain boiling in aluminium liquid, reduced the incubation period of alterant, behind rotten the finishing, can carry out die casting production after skimming.The die casting tensile bar detects: tensile strength 330MPa, unit elongation 2.5%
Embodiment 5:
With the YL104 aluminium liquid for preparing with non-iron crucible melting to 750 ℃, after the degasification refining, to weigh 1.5% embodiment, 2 made alterants and add in the aluminium liquid through the aluminium liquid that accounts for of preheating, finish with pressing spoon that alterant is pressed into to the aluminium liquid at 40mm place, crucible bottom, melting to alterant.Because rare earth can produce certain boiling in aluminium liquid, reduced the incubation period of alterant, behind rotten the finishing, can carry out die casting production after skimming.The die casting tensile bar detects: tensile strength 290MPa, unit elongation 1.8%
Embodiment 6:
With the YL113 aluminium liquid for preparing with non-iron crucible melting to 740 ℃, after the degasification refining, to weigh 1.5% embodiment, 3 made alterants and add in the aluminium liquid through the aluminium liquid that accounts for of preheating, finish with pressing spoon that alterant is pressed into to the aluminium liquid at 50mm place, crucible bottom, melting to alterant.Because rare earth can produce certain boiling in aluminium liquid, reduced the incubation period of alterant, behind rotten the finishing, can carry out die casting production after skimming.The die casting tensile bar detects: tensile strength 320MPa, unit elongation 2.5%.
Claims (4)
1, a kind of alterant of aluminum silicon alloy is characterized in that: comprise following component and concentration expressed in percentage by weight: rare earth 10-15, and strontium 3-7%, silicon 6.5-8.5%, all the other are aluminium.
2, the alterant of a kind of aluminum silicon alloy according to claim 1 is characterized in that: adding concentration expressed in percentage by weight in the agent on the turn is the titanium of 0.5-1%.
3, the alterant of a kind of aluminum silicon alloy according to claim 1 is characterized in that: described rare earth is a Baotou rare earth.
4, the using method of the alterant of the described a kind of aluminum silicon alloy of claim 1 is: aluminium liquid with the melting of non-iron crucible to 720-750 ℃, after the degasification refining, to add in the aluminium liquid through the alterant that accounts for the heavy 1-1.5% of aluminium liquid of preheating, with pressing spoon that alterant is pressed into to the aluminium liquid at 20-50mm place, crucible bottom, melt fully to alterant, can carry out die casting production after skimming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910144933A CN101660074A (en) | 2009-09-14 | 2009-09-14 | Modifier for high-strength aluminum alloy and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910144933A CN101660074A (en) | 2009-09-14 | 2009-09-14 | Modifier for high-strength aluminum alloy and use method thereof |
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| CN101660074A true CN101660074A (en) | 2010-03-03 |
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| CN200910144933A Pending CN101660074A (en) | 2009-09-14 | 2009-09-14 | Modifier for high-strength aluminum alloy and use method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329997A (en) * | 2011-10-10 | 2012-01-25 | 中国矿业大学 | Strontium-silicon alterative for hypereutectic AlSi alloy |
| CN102796920A (en) * | 2012-07-16 | 2012-11-28 | 芜湖永裕汽车工业有限公司 | Modifier for lowering hydrogen absorption tendency of aluminum alloy |
| CN102925765A (en) * | 2012-11-30 | 2013-02-13 | 中国矿业大学 | Aluminum-phosphorus-strontium-rare earth alloy alterant and preparation technology thereof |
| CN104195385A (en) * | 2014-08-29 | 2014-12-10 | 沈阳工业大学 | Permanent modifier capable of improving electrical conductivity of hypo eutectic Al-Si alloy as well as preparation method and using method of permanent modifier |
| CN104711445A (en) * | 2015-04-09 | 2015-06-17 | 芜湖永裕汽车工业有限公司 | Aluminum-strontium alloy modifier suitable for casting aluminum-silicon alloys |
| CN104762537A (en) * | 2015-04-09 | 2015-07-08 | 芜湖永裕汽车工业有限公司 | Preparation technique of aluminum-strontium alloy modifier for casting aluminum-silicon alloy |
| CN106011556A (en) * | 2016-06-15 | 2016-10-12 | 平顶山市美伊金属制品有限公司 | Aluminum alloy used for casting pot and manufacturing method of aluminum alloy |
| CN106191543A (en) * | 2016-07-20 | 2016-12-07 | 西安科技大学 | A kind of preparation method of aluminium alloy automobile engine cylinder cap |
| CN106676332A (en) * | 2016-10-25 | 2017-05-17 | 河北工业大学 | Aluminum alloy composite refining-modifying agent and preparing method and application thereof |
| CN108620575A (en) * | 2018-02-11 | 2018-10-09 | 周炳利 | A kind of thermite reaction nano composite structure aluminum shot and preparation method thereof |
| CN109868395A (en) * | 2019-03-20 | 2019-06-11 | 安徽信息工程学院 | A kind of high hardness material and preparation method thereof |
| CN109868384A (en) * | 2019-03-20 | 2019-06-11 | 安徽信息工程学院 | A kind of material and preparation method thereof changing alloy phase |
-
2009
- 2009-09-14 CN CN200910144933A patent/CN101660074A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102329997A (en) * | 2011-10-10 | 2012-01-25 | 中国矿业大学 | Strontium-silicon alterative for hypereutectic AlSi alloy |
| CN102796920A (en) * | 2012-07-16 | 2012-11-28 | 芜湖永裕汽车工业有限公司 | Modifier for lowering hydrogen absorption tendency of aluminum alloy |
| CN102925765A (en) * | 2012-11-30 | 2013-02-13 | 中国矿业大学 | Aluminum-phosphorus-strontium-rare earth alloy alterant and preparation technology thereof |
| CN104195385A (en) * | 2014-08-29 | 2014-12-10 | 沈阳工业大学 | Permanent modifier capable of improving electrical conductivity of hypo eutectic Al-Si alloy as well as preparation method and using method of permanent modifier |
| CN104762537B (en) * | 2015-04-09 | 2016-08-24 | 芜湖永裕汽车工业有限公司 | It is applicable to the preparation technology of the al-sr alloy alterant of cast Al-Si alloy |
| CN104762537A (en) * | 2015-04-09 | 2015-07-08 | 芜湖永裕汽车工业有限公司 | Preparation technique of aluminum-strontium alloy modifier for casting aluminum-silicon alloy |
| CN104711445A (en) * | 2015-04-09 | 2015-06-17 | 芜湖永裕汽车工业有限公司 | Aluminum-strontium alloy modifier suitable for casting aluminum-silicon alloys |
| CN104711445B (en) * | 2015-04-09 | 2017-05-03 | 芜湖永裕汽车工业有限公司 | Aluminum-strontium alloy modifier suitable for casting aluminum-silicon alloys |
| CN106011556A (en) * | 2016-06-15 | 2016-10-12 | 平顶山市美伊金属制品有限公司 | Aluminum alloy used for casting pot and manufacturing method of aluminum alloy |
| CN106191543A (en) * | 2016-07-20 | 2016-12-07 | 西安科技大学 | A kind of preparation method of aluminium alloy automobile engine cylinder cap |
| CN106676332A (en) * | 2016-10-25 | 2017-05-17 | 河北工业大学 | Aluminum alloy composite refining-modifying agent and preparing method and application thereof |
| CN108620575A (en) * | 2018-02-11 | 2018-10-09 | 周炳利 | A kind of thermite reaction nano composite structure aluminum shot and preparation method thereof |
| CN109868395A (en) * | 2019-03-20 | 2019-06-11 | 安徽信息工程学院 | A kind of high hardness material and preparation method thereof |
| CN109868384A (en) * | 2019-03-20 | 2019-06-11 | 安徽信息工程学院 | A kind of material and preparation method thereof changing alloy phase |
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Application publication date: 20100303 |