CN101220433A - High-alumina magnesium alloy - Google Patents
High-alumina magnesium alloy Download PDFInfo
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- CN101220433A CN101220433A CNA2008100191075A CN200810019107A CN101220433A CN 101220433 A CN101220433 A CN 101220433A CN A2008100191075 A CNA2008100191075 A CN A2008100191075A CN 200810019107 A CN200810019107 A CN 200810019107A CN 101220433 A CN101220433 A CN 101220433A
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Abstract
The invention relates to a high aluminum-magnesium alloy and the weight percentages of the components are as follows: 10.5 to 11.5 percent of Al, 0.17 to 0.40 percent of Mn, 0.45 to 0.90 percent of Zn, less than or equal to 0.08 percent of Si, less than or equal to 0.004 percent of Fe, less than or equal to 0.025 percent of Cu, less than or equal to 0.001 percent of Ni, 0 to 0.0015 percent of Be and the allowance is Mg. Compared with the existing AZ91D magnesium alloy, the high aluminum-magnesium alloy has the advantages of improving the fluidity and at the same time decreasing the melting points of the alloy and then relatively reducing the cost.
Description
Technical field
The invention belongs to the magnesium alloy production technical field, relate in particular to a kind of high aluminum magnesium alloy.
Background technology
At present, along with the exploitation of development of science and technology and magnesium alloy purposes, it is used more and more widely.Mainly be because magnesium alloy has excellent casting thin-wall performance, and keep certain intensity, rigidity and impact resistance, the electromagnetic shielding ability of magnesium alloy is strong simultaneously, thermal diffusivity good, and favourable condition has been created in, ultralight ultra-thin for product and microminiaturization.Be the component surface light of raw material production wherein with magnesium alloy AZ91D alloy granule series product, light weight.But the flowability of its alloy etc. can't satisfy the more frivolous 3C component of production structure fully.
Summary of the invention
The purpose of this invention is to provide a kind of high aluminum magnesium alloy, the flowability of its alloy etc. has significantly improved than the AZ91D alloy, is more suitable for producing more frivolous 3C component.
The weight percent of each component of the present invention is: Al:10.5～11.5%, Mn:0.17～0.40%, Zn:0.45～0.90%, Si≤0.08%, Fe: Cu≤0.004% :≤0.025%, Ni≤0.001%, Be:0～0.0015%, other impurity elements≤0.05%, surplus is Mg.
Preparation method of the present invention comprises the steps:
1, industrial magnesium ingot, aluminium ingot, zinc ingot metal are dropped in the off-the-shelf clean crucible adds end flux melts, the consumption of end flux accounts for 1.5～2.5% of furnace charge total amount, be sprinkled into insulating covering agent in the process to prevent burning, the consumption of insulating covering agent accounts for 0.3～0.5% of furnace charge total amount, the whole melting process time is controlled at 4～6h, and magnesium liquid outlet temperature is controlled at 670～690 ℃;
2, after fusing finishes, blow in magnesium liquid, and adopt mechanical stirring, add Manganous chloride tetrahydrate and refining agent simultaneously and carry out refining, the consumption of refining agent accounts for 1.5～2.5% of furnace charge total amount, and the time is controlled at 25～35min, and temperature is controlled at 680～740 ℃;
3, continue to blow in magnesium liquid, and adopt mechanical stirring, add refining agent simultaneously and carry out refining once more, the consumption of refining agent accounts for 1.5～2.5% of furnace charge total amount, and last 5min carries slag, and the time is controlled at 45～55min, and temperature is controlled at 730～750 ℃;
4, leave standstill cooling after the end, make flux and inclusion sedimentation, whole process time is controlled at 60min, and outlet temperature is controlled at 640～670 ℃, and adds aluminium beryllium master alloy under this temperature, till melting fully;
5, finally under 620～650 ℃ of temperature condition, and pour into a mould in protective atmosphere, protective atmosphere is generally SF
6, CO
2, N
2, SO
2, dry air mixed gas or mixed gas protected atmosphere.
Existing end flux, insulating covering agent, the refining agent that is useful on magnesium alloy preparation technology all can be used for using in the preparation process of the present invention.
The present invention has improved the content of aluminium element in the component on the basis of AZ91D magnesium alloy, because the increase of aluminium content, Tc reduces at interval gradually, α when solidifying (Mg)+β (Mg
17Al
12) eutectic increases gradually, and the castability of alloy is constantly improved, particularly the flowing property of alloy obtains raising to a certain degree, more helps producing more frivolous 3C component; Along with the increase of aluminium content, the fusing point of alloy decreases, and approximately reduces by 40 ℃, has saved the part energy indirectly simultaneously.Because the maxima solubility of aluminium in magnesium is 12.7%, so aluminium element of the present invention is controlled at 10.5～11.5%.
Zinc is that Mg-Al is an important alloy element in the alloy.Mg-Al-Zn is that alloy does not contain rare your element, good mechanical performance, and good fluidity, hot cracking tendency is little, and melt casting process is simple relatively, and cost is lower.A spot of zinc joins in the Mg-Al alloy, can significantly improve the solid solubility of aluminium in magnesium matrix under the room temperature, the solution strengthening effect that has increased alloy.Simultaneously, the adding of zinc improves the corrosion stability of alloy and the alloy mechanical property in as-heat-treated condition greatly.But zinc too high levels, enlarged markedly the Tc interval of alloy, increased the ardent of alloy and shrinkage porosite tendency, so zinc content generally is controlled at about 1.0% in the Mg-Al alloy, the applicant is by a large amount of research and test, and zinc element the most of the present invention is controlled at 0.45～0.90%.
Add a small amount of manganese in the Mg-Al alloy and can obviously improve corrosion resisting property.This be because manganese in magnesium liquid easily and iron form dystectic Mg-Fe compound and from magnesium liquid, precipitate, reduced the harm of impurity iron to the alloy corrosion resistance nature.And manganese dissolves in the current potential that can improve matrix among the α (Mg), and the magnesium matrix solidity to corrosion is improved.Manganese is also favourable to the refining Mg-Al alloy grain.But manganese content is unsuitable too high, otherwise cause the segregation of manganese and form the fragility phase, alloy plasticity, impact toughness are had disadvantageous effect, manganese content is controlled at below 0.5% usually, the applicant is by a large amount of research and test, and manganese element the most of the present invention is controlled at 0.17～0.40%.
Mg-Al needs the major impurity element of strict control to comprise silicon, iron, copper, nickel etc. in the alloy, these elements seriously reduce the corrosion stability of alloy.Because their solid solubility in magnesium alloy are very low, content seldom just be enough on crystal boundary to form with matrix very big potential difference arranged indissoluble mutually, produce and corrode.The applicant studies a large amount of research and experiment, silicon, iron, copper, nickel among the present invention all rationally are controlled at lower scope, be that element silicon is controlled at and is not more than 0.08%, ferro element is controlled at and is not more than 0.004%, copper is controlled at and is not more than 0.025%, nickel element is controlled at and is not more than 0.001%, other impurity elements :≤0.05%.
Can also the addition element beryllium in the Mg-Al alloy.Beryllium is surfactivity to magnesium, adding micro-beryllium in the magnesium liquid can form fine and close beryllium oxide and be filled in the loose magnesium oxide films, the retardance liquid magnesium alloy continues oxidation, be a kind of effective ignition-proof element in the magnesium alloy, but the beryllium too high levels can cause grain coarsening, worsen alloy mechanical property, increase the alloy hot cracking tendency, beryllium content should be controlled at about 0.0010% in the general Mg alloy castings, and the applicant is by a large amount of research and test, and beryllium element the most of the present invention controls 0～0.0015%.
Compare with existing AZ91D magnesium alloy, flowability of the present invention obtains certain raising, reduces the fusing point of alloy simultaneously, thus relative minimizing cost.
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment 1:
Magnesium ingot 1063.2kg, aluminium ingot 126.0kg, zinc ingot metal 10.8kg are dropped in the off-the-shelf clean crucible, flux 18kg melts at the bottom of adding RJ-2, be sprinkled into RJ-4 insulating covering agent 6.0kg in the process to prevent burning, the time is controlled at 4h, and magnesium liquid outlet temperature is controlled at 670 ℃; After fusing finishes, blow in magnesium liquid, and adopt mechanical stirring, add RJ-6 refining agent 18kg simultaneously and Manganous chloride tetrahydrate 11.0kg carries out refining, the time is controlled at 25min, and temperature is controlled at 680 ℃; Continuation is blown in magnesium liquid, and adopts mechanical stirring, adds RJ-6 refining agent 30kg refining once more simultaneously, and last 5min carries slag, and the time is controlled at 45min, and temperature is controlled at 730 ℃; Leave standstill cooling after the end, make flux and inclusion sedimentation, whole process control is at 60min, and outlet temperature is controlled at 640 ℃, and this operation does not add aluminium beryllium master alloy, notes the protection of cast(ing) surface in the casting process; Finally under 620 ℃ of temperature condition, and at SF
6+ N
2Pour into a mould in the mixed gas protected atmosphere.The weight percent of the chemical ingredients of the magnesium alloy that makes like this is: Al:10.5%, Mn:0.40%, Zn:0.90%, Si≤0.08%, Fe: Cu≤0.004% :≤0.025%, Ni≤0.001%, Be:0%, surplus is Mg.
Owing to carry out the standing sedimentation removal of impurity and later proposing in the slag process at magnesium liquid, have part material and be eliminated, add the reason of high temperature oxidation, the finished product rate of recovery of making is between 95～96%.Therefore certain composition when sampling analysis, might occur and not meet the predetermined preparation requirement of alloy, at this moment should be according to predetermined prescription, the melting once more of some raw material of corresponding adding is till sampling analysis is qualified.For following embodiment above-mentioned requirement is arranged all.
Embodiment 2:
Magnesium ingot 1059.6kg, aluminium ingot 130.8kg, zinc ingot metal 8.40kg are dropped in the off-the-shelf clean crucible, flux 24kg melts at the bottom of adding RJ-2, be sprinkled into RJ-5 insulating covering agent 4.8kg in the process to prevent burning, the time is controlled at 5h, and magnesium liquid outlet temperature is controlled at 680 ℃; After fusing finishes, blow in magnesium liquid, and adopt mechanical stirring, add RJ-5 refining agent 24kg simultaneously and Manganous chloride tetrahydrate 8.30kg carries out refining, the time is controlled at 30min, and temperature is controlled at 710 ℃; Continuation is blown in magnesium liquid, and adopts mechanical stirring, adds RJ-5 refining agent 24kg refining once more simultaneously, and last 5min carries slag, and the time is controlled at 50min, and temperature is controlled at 740 ℃; Leave standstill cooling after the end, make flux and inclusion sedimentation, whole process control is at 60min, and outlet temperature is controlled at 655 ℃, and adds aluminium beryllium master alloy 1.2kg under this temperature, till melting fully; Finally under 635 ℃ of temperature condition, and at SO
2+ N
2Pour into a mould in the mixed gas protected atmosphere.The weight percent of the chemical ingredients of the magnesium alloy that makes like this is: Al:11.0%, Mn:0.30%, Zn:0.70%, Si≤0.08%, Fe: Cu≤0.004% :≤0.025%, Ni≤0.001%, Be:0.0010%, surplus is Mg.
The beryllium amount that effectively contains of the aluminium beryllium master alloy that adds among the present invention generally is controlled at 1.0%.Following examples all this.
Embodiment 3:
Magnesium ingot 1056.6kg, aluminium ingot 136.2kg, zinc ingot metal 5.40kg are dropped in the off-the-shelf clean crucible, flux 30kg melts at the bottom of adding RJ-2, be sprinkled into RJ-6 insulating covering agent 3.6kg in the process to prevent burning, the time is controlled at 6h, and magnesium liquid outlet temperature is controlled at 690 ℃; After fusing finishes, blow in magnesium liquid, and adopt mechanical stirring, add RJ-4 refining agent 30kg simultaneously and Manganous chloride tetrahydrate 4.70kg carries out refining, the time is controlled at 35min, and temperature is controlled at 740 ℃; Continuation is blown in magnesium liquid, and adopts mechanical stirring, adds RJ-4 refining agent 18kg refining once more simultaneously, and last 5min carries slag, and the time is controlled at 55min, and temperature is controlled at 750 ℃; Leave standstill cooling after the end, make flux and inclusion sedimentation, whole process control is at 60min, and outlet temperature is controlled at 670 ℃, and adds aluminium beryllium master alloy 1.8kg under this temperature, till melting fully; Finally under 650 ℃ of temperature condition, and at CO
2+ N
2Pour into a mould in the mixed gas protected atmosphere.The weight percent of the chemical ingredients of the magnesium alloy that makes like this is: Al:11.5%, Mn:0.18%, Zn:0.45%, Si≤0.08%, Fe: Cu≤0.004% :≤0.025%, Ni≤0.001%, Be:0.0015%, surplus is Mg.
Claims (4)
1. high aluminum magnesium alloy, the weight percent that it is characterized in that component is: Al:10.5～11.5%, Mn:0.17～0.40%, Zn:0.45～0.90%, Si: Fe≤0.08%: Cu≤0.004%: Ni≤0.025%: Be:0～0.0015%≤0.001%,, surplus are Mg.
2. high according to claim 1 aluminum magnesium alloy is characterized in that content≤0.05% of impurity element.
3. the preparation method of claim 1 or 2 described high aluminum magnesium alloys is characterized in that comprising the steps:
1) will add end flux melts in industrial magnesium ingot, aluminium ingot, the zinc ingot metal input crucible, the consumption of end flux accounts for 1.5～2.5% of furnace charge total amount, be sprinkled into insulating covering agent in the melting process to prevent burning, the consumption of insulating covering agent accounts for 0.3～0.5% of furnace charge total amount, the whole melting process time is controlled at 4～6h, and magnesium liquid outlet temperature is controlled at 670～690 ℃;
2) after fusing finishes, blow in magnesium liquid and stir, add Manganous chloride tetrahydrate and refining agent simultaneously and carry out refining, the consumption of refining agent accounts for 1.5～2.5% of furnace charge total amount, and the time is controlled at 25～35min, and temperature is controlled at 680～740 ℃;
3) continue to blow in magnesium liquid and stir, add refining agent simultaneously and carry out refining once more, the consumption of refining agent accounts for 1.5～2.5% of furnace charge total amount, and last 5min carries slag, and the time is controlled at 45～55min, and temperature is controlled at 730～750 ℃;
4) leave standstill cooling, make flux and inclusion sedimentation, whole process time is controlled at 60min, and outlet temperature is controlled at 640～670 ℃, and adds aluminium beryllium master alloy under this temperature, till melting fully;
5) under 620～650 ℃ of temperature condition, and in protective atmosphere, pour into a mould.
4. as the preparation method of high aluminum magnesium alloy as described in the claim 3, it is characterized in that protective atmosphere is SF
6, CO
2, N
2, SO
2, dry air or mixed gas protected atmosphere.
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|---|---|---|---|
| CNA2008100191075A CN101220433A (en) | 2008-01-14 | 2008-01-14 | High-alumina magnesium alloy |
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|---|---|---|---|
| CNA2008100191075A CN101220433A (en) | 2008-01-14 | 2008-01-14 | High-alumina magnesium alloy |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294123A (en) * | 2013-11-22 | 2015-01-21 | 深圳市长盈精密技术股份有限公司 | Magnesium-aluminum alloy material |
| CN104593653A (en) * | 2015-02-03 | 2015-05-06 | 闻喜县瑞格镁业有限公司 | High-strength magnesium alloy for thin-walled part and preparation method of magnesium alloy |
| CN104630584A (en) * | 2015-02-03 | 2015-05-20 | 闻喜县瑞格镁业有限公司 | Magnesium alloy for high-fluidity high-strength ultrathin-wall component and preparation method of magnesium alloy |
| CN104630585A (en) * | 2015-02-03 | 2015-05-20 | 闻喜县瑞格镁业有限公司 | High-strength magnesium alloy for ultrathin-wall components and preparation method thereof |
| CN104651690A (en) * | 2014-10-28 | 2015-05-27 | 宁波吉利罗佑发动机零部件有限公司 | Magnesium-aluminum alloy material for planet carrier and die-casting formation manufacturing process for planet carrier from magnesium-aluminum alloy material |
| CN105220048A (en) * | 2015-11-03 | 2016-01-06 | 苏州云海镁业有限公司 | A kind of high workability magnesium alloy and production technique thereof |
| CN106337141A (en) * | 2015-07-14 | 2017-01-18 | 上海帅翼驰铝合金新材料有限公司 | Method for improving ADC6 aluminum alloy ingot performances |
| CN107058836A (en) * | 2017-04-10 | 2017-08-18 | 广西科技大学 | A kind of mechanical cover highly corrosion resistant magnesium alloy and preparation method thereof |
| CN109182862A (en) * | 2018-11-21 | 2019-01-11 | 蚌埠创特新材料科技有限公司 | A kind of anticorrosive magnesium-aluminium alloy |
| CN110821302A (en) * | 2019-11-19 | 2020-02-21 | 江苏方时远略科技咨询有限公司 | Keyboard type input coded lock adopting aluminum-magnesium alloy |
| CN114540653A (en) * | 2022-02-24 | 2022-05-27 | 惠州云海镁业有限公司 | High-corrosion-resistance magnesium alloy processing technology |
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2008
- 2008-01-14 CN CNA2008100191075A patent/CN101220433A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294123A (en) * | 2013-11-22 | 2015-01-21 | 深圳市长盈精密技术股份有限公司 | Magnesium-aluminum alloy material |
| CN104651690A (en) * | 2014-10-28 | 2015-05-27 | 宁波吉利罗佑发动机零部件有限公司 | Magnesium-aluminum alloy material for planet carrier and die-casting formation manufacturing process for planet carrier from magnesium-aluminum alloy material |
| CN104593653A (en) * | 2015-02-03 | 2015-05-06 | 闻喜县瑞格镁业有限公司 | High-strength magnesium alloy for thin-walled part and preparation method of magnesium alloy |
| CN104630584A (en) * | 2015-02-03 | 2015-05-20 | 闻喜县瑞格镁业有限公司 | Magnesium alloy for high-fluidity high-strength ultrathin-wall component and preparation method of magnesium alloy |
| CN104630585A (en) * | 2015-02-03 | 2015-05-20 | 闻喜县瑞格镁业有限公司 | High-strength magnesium alloy for ultrathin-wall components and preparation method thereof |
| CN106337141A (en) * | 2015-07-14 | 2017-01-18 | 上海帅翼驰铝合金新材料有限公司 | Method for improving ADC6 aluminum alloy ingot performances |
| CN106337141B (en) * | 2015-07-14 | 2018-07-20 | 上海帅翼驰铝合金新材料有限公司 | A method of improving ADC6 aluminium alloy ingots performances |
| CN105220048A (en) * | 2015-11-03 | 2016-01-06 | 苏州云海镁业有限公司 | A kind of high workability magnesium alloy and production technique thereof |
| CN107058836A (en) * | 2017-04-10 | 2017-08-18 | 广西科技大学 | A kind of mechanical cover highly corrosion resistant magnesium alloy and preparation method thereof |
| CN109182862A (en) * | 2018-11-21 | 2019-01-11 | 蚌埠创特新材料科技有限公司 | A kind of anticorrosive magnesium-aluminium alloy |
| CN109182862B (en) * | 2018-11-21 | 2020-04-03 | 阜阳创启工艺品有限公司 | Corrosion-resistant magnesium-aluminum alloy |
| CN110821302A (en) * | 2019-11-19 | 2020-02-21 | 江苏方时远略科技咨询有限公司 | Keyboard type input coded lock adopting aluminum-magnesium alloy |
| CN114540653A (en) * | 2022-02-24 | 2022-05-27 | 惠州云海镁业有限公司 | High-corrosion-resistance magnesium alloy processing technology |
| CN114540653B (en) * | 2022-02-24 | 2022-11-25 | 惠州云海镁业有限公司 | High-corrosion-resistance magnesium alloy processing technology |
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