CN102304651A - Casting aluminum-silicon alloy and strengthening method thereof - Google Patents
Casting aluminum-silicon alloy and strengthening method thereof Download PDFInfo
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- CN102304651A CN102304651A CN 201110231744 CN201110231744A CN102304651A CN 102304651 A CN102304651 A CN 102304651A CN 201110231744 CN201110231744 CN 201110231744 CN 201110231744 A CN201110231744 A CN 201110231744A CN 102304651 A CN102304651 A CN 102304651A
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Abstract
The invention discloses a casting aluminum-silicon alloy. The casting aluminum-silicon alloy comprises the following chemical components by weight percent: 9.0-11.0% of silicon, 3.0-5.0% of zinc, 0.4-1.0% of magnesium, 2.0-3.0% of copper, less than or equal to 0.3% of manganese and the balance of aluminum. The invention also discloses a strengthening method for casting the casting aluminum-silicon alloy. The method comprises the following steps: 1) adopting the smelting process: A) charging, B) melting and refining, C) performing modification, and D) pouring; and 2) performing heat treatment: A) performing solution treatment and performing aging treatment. By adopting the strengthening method, after the aging treatment, the number of strengthening phases can be increased and the strengthening phases with a good strengthening effect can be obtained; by adopting dispersion strengthening, the material can have higher strength and hardness than ZL108; because of the reduction of the hard and brittle silicon phase in the structure, the plasticity of the material is increased, the casting performance of the material is good and the product quality and dimensional accuracy of the casting are high. The application range of the casting aluminum-silicon alloy can be expanded.
Description
Technical field
The present invention relates to a kind of non-ferrous alloy material and enhancement method, relate in particular to a kind of enhancement method of cast aluminium silicon alloy, belong to the metallic substance technical field.
Background technology
Cast Al-Si alloy is a kind of in light weight, non-ferrous alloy material that intensity is high, is widely used in fields such as aerospace, automobile, electric power, military project, machinery.Most widely used in cast aluminium alloy is the casting Alar that comprises ZL108, and series of advantages such as unit weight is little, intensity is high, cast form property is good and processing characteristics is good that they have has become in the production one of the most valued structured material.But; The as cast condition mechanical property of casting Al-Si alloy is still unsatisfactory at present; Though can improve its mechanical property through thermal treatment; But along with the requirement in product reliability and work-ing life is more and more higher; Still can not satisfy industrial requirement; Therefore people just study the as cast condition aluminum silicon alloy from each different research direction, in the hope of improving its over-all properties, for example work hardening, solution strengthening, out-phase reinforcement, dispersion-strengthened, precipitation strength, grain-boundary strengthening etc.
Zinc can enlarge the solubleness of copper in aluminium, can increase CuAl during timeliness
2The quantity of strengthening phase improves dispersion-strengthened effect.In containing polynary aluminium alloys such as magnesium, copper, zinc is the element that forms strengthening phase, can significantly improve the mechanical property of aluminium alloy.Zinc also has the effect that improves cast aluminium alloy plasticity.But a lot of at present researchs all confirm as 1% to the addition of zinc in cast Al-Si alloy, cause the potential strengthening effect of zinc to fail to give full play to.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of cast Al-Si alloy and enhancement method are provided, this cast Al-Si alloy and enhancement method utilize alloying principle, have increased the strengthening phase CuAl that when timeliness, separates out
2Quantity and the Al-Zn-Mg-Cu compound that is strengthened effective reduce hard crisp phase, and the intensity and the hardness that have improved cast Al-Si alloy improve, and have certain plasticity.
The present invention is achieved through following technical scheme:
A kind of cast Al-Si alloy, chemical ingredients be by weight percentage: silicon 9.0-11.0%, and zinc 3.0-5.0%, magnesium 0.4-1.0%, copper 2.0-3.0%, manganese≤0.3%, surplus is aluminium.
A kind of enhancement method of cast Al-Si alloy may further comprise the steps:
1) melting technology
A, charging
The order of charging is: aluminium silicon master alloy, and the fine aluminium ingot, the aluminum bronze master alloy, aluminium manganese master alloy, zinc ingot metal, wherein zinc ingot metal adds when furnace charge melts back 660 ℃;
B, fusing and concise
After furnace charge had been adorned, fusing heated up.After treating that furnace charge all melts, slagging-off also adds flux; When temperature reaches 680 ℃, 200-300 ℃ magnalium master alloy be will be preheating to bell jar and the certain depth place in molten bath and slowly revolution and moving will be pressed into, the time is 3-5min; Be warmed up to 700-730 ℃ then, with the refining agent C that accounts for furnace charge total mass 0.7-0.75%
2Cl
6Divide to be pressed into refined alloy liquid in the alloy liquid with bell jar 2-3 time, total time is 10-15min, slowly at the stove interior circuit; Treat to leave standstill 1-2min after refining is accomplished, materials and do on-the-spot sample analysis;
C, the rotten processing
When the alloy liquid temp reaches 700-730 ℃, do rotten the processing with the sodium salt degeneration agent that accounts for furnace charge total mass 1.5%-2.5%, deteriorating time is 15-18min;
D, cast
5-10min is left standstill in slagging-off and stirring then after rotten the completion.When temperature reaches 730 ℃, the cast of coming out of the stove of skimming;
2) thermal treatment
A, solution treatment: the strand shove charge is warming up to 520-540 ℃ of insulation, and soaking time 4-6h comes out of the stove into water cooling, and medium is a 60-100 ℃ of hot water;
B, ageing treatment: the strand shove charge is warming up to 160-190 ℃ of insulation, soaking time 3-10h.
Beneficial effect of the present invention is following:
Cast Al-Si alloy of the present invention utilizes alloying principle, by weight percentage, through adding 3-5% zinc, increases 1-1.5% copper, reduces 2-3% silicon.Cast Al-Si alloy of the present invention has increased the solid solubility of copper in aluminium owing to added zinc, when timeliness, can separate out more copper-containing compound strengthening phase, and the adding of zinc has simultaneously increased the strengthening phase CuAl that when timeliness, separates out
2Quantity, can form the maximum Al-Zn-Mg-Cu compound of strengthening effect in the aluminium alloy.The content that reduces silicon helps to reduce hard crisp silicon phase, improves material plasticity.Because the zinc temperature of fusion is low, improved material flowability, the adding of zinc has been eliminated and has been reduced the possibility that material castability that silicone content brings descends, and makes the raising of cast Al-Si alloy intensity and hardness, and has certain plasticity.The surface quality of foundry goods and dimensional precision are all higher.
Enhancement method of the present invention can obtain the strengthening phase quantity of greater amt and the effective strengthening phase that strengthened after timeliness; Its dispersion-strengthened makes material have intensity and the hardness higher than ZL108; Under the same as-heat-treated condition, intensity improves 11.5-25.0%, and hardness improves 27.0-38.0%.The reduction of hard crisp silicon phase has improved material plasticity in the tissue, and under heat-treat condition of the present invention, unit elongation reaches 2.6-3.2%.The material good casting property, casting product quality and dimensional precision are high; Compare with ZL108, adopt enhancement method of the present invention to make cast Al-Si alloy that bigger range of application arranged.
Advantage of the present invention and characteristics will be advanced to explain that these embodiment only provide as an example through the non-limitative illustration of following preferred embodiment.
Embodiment
Below be three embodiment of the present invention, the invention is not restricted to following three embodiment.
Cast Al-Si alloy chemical ingredients of the present invention is by weight percentage: silicon 9.0-11.0%, and zinc 3.0-5.0%, magnesium 0.4-1.0%, copper 2.0-3.0%, manganese≤0.3%, surplus is aluminium.
The enhancement method of casting cast Al-Si alloy of the present invention may further comprise the steps:
1) melting
A, charging
The order of charging is: aluminium silicon master alloy, and the fine aluminium ingot, the aluminum bronze master alloy, aluminium manganese master alloy, zinc ingot metal, wherein zinc ingot metal adds when furnace charge melts back 660 ℃;
B, fusing and refining
After furnace charge had been adorned, fusing heated up.After treating that furnace charge all melts, slagging-off also adds flux; When temperature reaches 680 ℃, 200-300 ℃ magnalium master alloy be will be preheating to bell jar and the certain depth place in molten bath and slowly revolution and moving will be pressed into, the time is 3-5min; Be warmed up to 700-730 ℃ then, with the refining agent C that accounts for furnace charge total mass 0.7-0.75%
2Cl
6Divide to be pressed into refined alloy liquid in the alloy liquid with bell jar 2-3 time, total time is 10-15min, slowly at the stove interior circuit; Treat to leave standstill 1-2min after refining is accomplished, materials and do on-the-spot sample analysis;
C, the rotten processing
When the alloy liquid temp reaches 700-730 ℃, do rotten the processing with the sodium salt degeneration agent that accounts for furnace charge total mass 1.5%-2.5%, deteriorating time is 15-18min;
D, cast
5-10min is left standstill in slagging-off and stirring then after rotten the completion.When temperature reaches 730 ℃, the cast of coming out of the stove of skimming;
2) thermal treatment
A, solution treatment: the strand shove charge is warming up to 520-540 ℃ of insulation, and soaking time 4-6h comes out of the stove into water cooling, and medium is a 60-100 ℃ of hot water;
B, ageing treatment: the strand shove charge is warming up to 160-190 ℃ of insulation, soaking time 3-10h.
Material composition and the mechanical property of three embodiment of the present invention are seen table 1.
The material composition of table 1 embodiment and mechanical property
Unified technology is adopted in three embodiment thermal treatments in the table 1: solution treatment: 525 ℃ of temperature, and time 6h, heat-eliminating medium are 60-100 ℃ of hot water; Ageing treatment: 180 ℃ of temperature, time 10h.
Except that the foregoing description, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation form, all drop in the protection domain of requirement of the present invention.
Claims (2)
1. a cast Al-Si alloy is characterized in that, chemical ingredients by weight percentage: silicon 9.0-11.0%, zinc 3.0-5.0%, magnesium 0.4-1.0%, copper 2.0-3.0%, manganese≤0.3%, surplus is aluminium.
2. the enhancement method of a cast Al-Si alloy as claimed in claim 1 is characterized in that, may further comprise the steps:
1) melting
A, charging
The order of charging is: aluminium silicon master alloy, and the fine aluminium ingot, the aluminum bronze master alloy, aluminium manganese master alloy, zinc ingot metal, wherein zinc ingot metal adds when furnace charge melts back 660 ℃;
B, fusing and refining
After furnace charge had been adorned, the fusing that heats up was treated furnace charge all after the fusing, and slagging-off also adds flux; When temperature reaches 680 ℃, 200-300 ℃ magnalium master alloy be will be preheating to bell jar and the certain depth place in molten bath and slowly revolution and moving will be pressed into, the time is 3-5min; Be warmed up to 700-730 ℃ then, with the refining agent C that accounts for furnace charge total mass 0.7-0.75%
2Cl
6Divide to be pressed into refined alloy liquid in the alloy liquid with bell jar 2-3 times, total time is l0-15min, slowly at the stove interior circuit; Treat to leave standstill 1-2min after refining is accomplished, materials and do on-the-spot sample analysis;
C, the rotten processing
When the alloy liquid temp reaches 700-730 ℃, do rotten the processing with the sodium salt degeneration agent that accounts for furnace charge total mass 1.5%-2.5%, deteriorating time is 15-18min;
D, cast
5-10min is left standstill in slagging-off and stirring then after rotten the completion, when temperature reaches 730 ℃, and the cast of coming out of the stove of skimming; 2) thermal treatment
A, solution treatment: the strand shove charge is warming up to 520-540 ℃ of insulation, and soaking time 4-6h comes out of the stove into water cooling, and medium is a 60-100 ℃ of hot water;
B, ageing treatment: the strand shove charge is warming up to 160-190 ℃ of insulation, soaking time 3-10h.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925764A (en) * | 2012-11-15 | 2013-02-13 | 山东大学 | Dual-modification method of eutectic and hypereutectic aluminum-silicon alloy |
| CN103334034A (en) * | 2013-06-14 | 2013-10-02 | 宁波科达制动器制造有限公司 | Preparation method of gas compressor volute of turbocharger |
| CN105063390A (en) * | 2015-07-17 | 2015-11-18 | 济南大学 | Hypoeutectic aluminum-silicon alloy melt compound treatment method |
| CN106244957A (en) * | 2016-03-24 | 2016-12-21 | 上海汇众汽车制造有限公司 | The Technology for Heating Processing of AlSi7Mg aluminium alloy castings |
| CN108754250A (en) * | 2018-06-03 | 2018-11-06 | 深圳市鑫申新材料科技有限公司 | A kind of high strength die-casting aluminum alloy and its manufacturing method |
| CN109280820A (en) * | 2018-10-26 | 2019-01-29 | 中国航发北京航空材料研究院 | It is a kind of for the high-strength aluminum alloy of increasing material manufacturing and its preparation method of powder |
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| EP0687742A1 (en) * | 1994-06-16 | 1995-12-20 | ALUMINIUM RHEINFELDEN GmbH | Die casting alloy |
| CN101018881A (en) * | 2004-07-28 | 2007-08-15 | 美铝公司 | An Al-Si-Mg-Zn-Cu alloy for aerospace and automotive castings |
| CN102146542A (en) * | 2011-03-26 | 2011-08-10 | 河南理工大学 | High-strength and high-toughness cast Al-Si-Mg alloy |
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2011
- 2011-08-15 CN CN 201110231744 patent/CN102304651B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0687742A1 (en) * | 1994-06-16 | 1995-12-20 | ALUMINIUM RHEINFELDEN GmbH | Die casting alloy |
| CN101018881A (en) * | 2004-07-28 | 2007-08-15 | 美铝公司 | An Al-Si-Mg-Zn-Cu alloy for aerospace and automotive castings |
| CN102146542A (en) * | 2011-03-26 | 2011-08-10 | 河南理工大学 | High-strength and high-toughness cast Al-Si-Mg alloy |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925764A (en) * | 2012-11-15 | 2013-02-13 | 山东大学 | Dual-modification method of eutectic and hypereutectic aluminum-silicon alloy |
| CN103334034A (en) * | 2013-06-14 | 2013-10-02 | 宁波科达制动器制造有限公司 | Preparation method of gas compressor volute of turbocharger |
| CN103334034B (en) * | 2013-06-14 | 2016-05-25 | 宁波科达制动器制造有限公司 | A kind of preparation method of turbocharger air compressor spiral case |
| CN105063390A (en) * | 2015-07-17 | 2015-11-18 | 济南大学 | Hypoeutectic aluminum-silicon alloy melt compound treatment method |
| CN106244957A (en) * | 2016-03-24 | 2016-12-21 | 上海汇众汽车制造有限公司 | The Technology for Heating Processing of AlSi7Mg aluminium alloy castings |
| CN108754250A (en) * | 2018-06-03 | 2018-11-06 | 深圳市鑫申新材料科技有限公司 | A kind of high strength die-casting aluminum alloy and its manufacturing method |
| CN109280820A (en) * | 2018-10-26 | 2019-01-29 | 中国航发北京航空材料研究院 | It is a kind of for the high-strength aluminum alloy of increasing material manufacturing and its preparation method of powder |
| CN109280820B (en) * | 2018-10-26 | 2021-03-26 | 中国航发北京航空材料研究院 | High-strength aluminum alloy for additive manufacturing and preparation method of powder of high-strength aluminum alloy |
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