CN102329997B - Strontium-silicon alterative for hypereutectic AlSi alloy - Google Patents
Strontium-silicon alterative for hypereutectic AlSi alloy Download PDFInfo
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- CN102329997B CN102329997B CN 201110302973 CN201110302973A CN102329997B CN 102329997 B CN102329997 B CN 102329997B CN 201110302973 CN201110302973 CN 201110302973 CN 201110302973 A CN201110302973 A CN 201110302973A CN 102329997 B CN102329997 B CN 102329997B
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- silicon
- strontium
- alloy
- alterant
- alterative
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- MIDOFQRPAXDZET-UHFFFAOYSA-N [Si].[Sr] Chemical compound [Si].[Sr] MIDOFQRPAXDZET-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 title abstract description 11
- 239000000956 alloy Substances 0.000 title abstract description 11
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 title abstract 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 36
- 239000010703 silicon Substances 0.000 claims abstract description 29
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 23
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000498 ball milling Methods 0.000 claims abstract description 16
- 229910001278 Sr alloy Inorganic materials 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000011812 mixed powder Substances 0.000 claims abstract description 3
- 238000005303 weighing Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 10
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims description 8
- 229910018125 Al-Si Inorganic materials 0.000 claims description 5
- 229910018520 Al—Si Inorganic materials 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 235000013312 flour Nutrition 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 230000005496 eutectics Effects 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000004907 flux Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 3
- 239000004484 Briquette Substances 0.000 abstract 2
- 239000011863 silicon-based powder Substances 0.000 abstract 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 229910000676 Si alloy Inorganic materials 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 3
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention provides a strontium-silicon alterative for hypereutectic AlSi alloy, and belongs to a flux for altering melt in the AlSi alloy casting process. The strontium-silicon alterative for hypereutectic AlSi alloy consists of the following components in percentage by mass: 20 to 88.5 percent of strontium, and 11.5 to 80 percent of silicon. The preparation method comprises the following steps: (1) weighing silicon powder and strontium powder according to the mass percentage that strontium accounts for 20 to 88.5 percent and silicon accounts for 11.5 to 80 percent, and uniformly mixing the silicon powder and the strontium powder in vacuum; (2) compacting the mixed powder into a briquette at a pressure of 1kN; (3) melting the compacted Si and Sr briquette into Si-Sr alloy in a rapid heating furnace, heating the rapid heating furnace from room temperature to 1500 DEG C in 30 minutes, preserving the temperature for 60 minutes, and cooling along with the furnace; (4) crushing the silicon-strontium alloy which is prepared in the step 3, and performing ball milling; and (5) thermally treating the ball-milled Si-Sr alterative at the temperature of between 700 and 1045 DEG C to acquire a corresponding eutectic structure. The strontium-silicon alterative has the advantages that: primary silicon phase and eutectic silicon phase in the hypereutectic AlSi alloy are refined, so that the using performance of the alloy is improved; the alternation effect is stable and long-acting; and the preparation process is simple, and has low environmental pollution.
Description
Technical field
The present invention relates to the flux that a kind of aluminum silicon alloy castingprocesses goes bad to melt, particularly a kind of strontium for transcocrystallized Al-Si alloy-silicon alterant.
Technical background
The advantages such as Hypereutectic Al-Si Alloy has that density is little, thermal conductivity good, thermal expansivity is little, wear-resisting, anti-corrosion, good stability of the dimension, and hot cracking tendency is little.But there are the primary silicon of thick bulk and the Eutectic Silicon in Al-Si Cast Alloys tissue of thick minute hand shape in the uninoculated transcocrystallized Al-Si alloy, seriously isolate the continuity of Al matrix, worsen comprehensive mechanical property and the machinability of alloy, restricted the scope of application of transcocrystallized Al-Si alloy.
Summary of the invention
The objective of the invention is to provide a kind of strontium for transcocrystallized Al-Si alloy-silicon alterant, solve the continuity of seriously isolating the Al matrix, worsen comprehensive mechanical property and the machinability of alloy, the problem of the scope of application of restriction transcocrystallized Al-Si alloy.
The objective of the invention is to be achieved through the following technical solutions: be used for the alterant of transcocrystallized Al-Si alloy, its mass percent forms: strontium: 20%-88.5%; Silicon: 11.5%-80%.
The preparation method of strontium-silicon alterant carries out according to the following steps:
(1) according to mass percent strontium 20%-88.5%; Silicon 11.5%-80% takes by weighing silica flour and strontium powder, in a vacuum it is mixed;
(2) above-mentioned mixed powder is compacted into briquetting under 1KN pressure;
(3) Si, the Sr briquetting with compacting places the stove that is rapidly heated to be smelted into the Si-Sr alloy, and the stove that is rapidly heated is warming up to 1500 ℃ at 30min by room temperature, behind the insulation 60min, and furnace cooling;
(4) silicon that step 3 is prepared-strontium alloy is broken, ball milling, and the ball milling granularity is 200 orders.
(5) strontium that ball milling is good-silicon alterant is heat-treated under 700 ℃-1045 ℃, wherein, heat-treats under 700 ℃, and the alterant of acquisition is Sr and SiSr
2Mixture; Heat-treat under 1000 ℃, the alterant of acquisition is Si and Si
2The mixture of Sr; Heat-treat under 1045 ℃, the alterant of acquisition is SiSr and Si
2The mixture of Sr.
Beneficial effect owing to having adopted such scheme, adopts alterant of the present invention, can make primary silicon and Eutectic Silicon Refinement in the transcocrystallized Al-Si alloy, thereby improves the alloy use properties.Modification effect is stable, long-acting; Preparation technology is simple, and environmental pollution is little.Solved the continuity of seriously isolating the Al matrix, worsened comprehensive mechanical property and the machinability of alloy, the problem of the scope of application of restriction transcocrystallized Al-Si alloy has reached purpose of the present invention.
Description of drawings
The metallographic structure photo that Fig. 1 is the Al-20wt%Si alloy when rotten.
Fig. 2 is the metallographic structure photo of Al-20wt%Si alloy after 700 ℃ of heat treated silicon strontium alterants are rotten.
Fig. 3 is the metallographic structure photo of Al-20wt%Si alloy after 1000 ℃ of heat treated silicon strontium alterants are rotten.
Fig. 4 is the metallographic structure photo of Al-20wt%Si alloy after 1045 ℃ of heat treated silicon strontium alterants are rotten.
Embodiment
Embodiment 1:(1) mass percent of strontium-silicon alterant consists of silicon: 80%, and strontium: 20%.Compacting under 1KN pressure; (2) briquetting is put into the stove that is rapidly heated, make the stove that is rapidly heated be warming up to 1500 ℃ at 30min by room temperature, behind the insulation 60min, furnace cooling; (3) silicon that step 2 is prepared-strontium alloy is broken, ball milling, and the ball milling granularity is 200 orders.(4) strontium that ball milling is good-silicon alterant is heat-treated under 1000 ℃, and the alterant of acquisition is Si and Si
2The mixture of Sr.
Embodiment 2:(1) mass percent of strontium-silicon alterant consists of silicon: 57.2%, and strontium: 42.8%.Compacting under 1KN pressure; (2) briquetting is put into the stove that is rapidly heated, make the stove that is rapidly heated be warming up to 1500 ℃ at 30min by room temperature, behind the insulation 60min, furnace cooling; (3) silicon that step 2 is prepared-strontium alloy is broken, ball milling, and the ball milling granularity is 200 orders.(4) strontium that ball milling is good-silicon alterant is heat-treated under 1045 ℃, and the alterant of acquisition is SiSr and Si
2The mixture of Sr.
Embodiment 3:(1) mass percent of strontium-silicon alterant consists of silicon: 11.5%, and strontium: 88.5%.Compacting under 1KN pressure; (2) briquetting is put into the stove that is rapidly heated, make the stove that is rapidly heated be warming up to 1500 ℃ at 30min by room temperature, behind the insulation 60min, furnace cooling; (3) silicon that step 2 is prepared-strontium alloy is broken, ball milling, and the ball milling granularity is 200 orders.(4) strontium that ball milling is good-silicon alterant is heat-treated under 700 ℃, and the alterant of acquisition is Sr and SiSr
2Mixture.
Claims (1)
1. the strontium for transcocrystallized Al-Si alloy-silicon alterant is characterized in that: be used for the alterant of transcocrystallized Al-Si alloy, its mass percent composition: strontium: 20%-88.5%; Silicon: 11.5%-80%;
The preparation method of strontium-silicon alterant carries out according to the following steps:
(1) according to mass percent strontium 20%-88.5%; Silicon 11.5%-80% takes by weighing silica flour and strontium powder, in a vacuum it is mixed;
(2) above-mentioned mixed powder is compacted into briquetting under 1KN pressure;
(3) Si, the Sr briquetting with compacting places the stove that is rapidly heated to be smelted into the Si-Sr alloy, and the stove that is rapidly heated is warming up to 1500 ℃ at 30min by room temperature, behind the insulation 60min, and furnace cooling;
(4) silicon that step 3 is prepared-strontium alloy is broken, ball milling, and the ball milling granularity is 200 orders;
(5) strontium that ball milling is good-silicon alterant is heat-treated under 700 ℃-1045 ℃, wherein, heat-treats under 700 ℃, and the alterant of acquisition is Sr and SiSr
2Mixture; Heat-treat under 1000 ℃, the alterant of acquisition is Si and Si
2The mixture of Sr; Heat-treat under 1045 ℃, the alterant of acquisition is SiSr and Si
2The mixture of Sr.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110302973 CN102329997B (en) | 2011-10-10 | 2011-10-10 | Strontium-silicon alterative for hypereutectic AlSi alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110302973 CN102329997B (en) | 2011-10-10 | 2011-10-10 | Strontium-silicon alterative for hypereutectic AlSi alloy |
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| CN102329997B true CN102329997B (en) | 2013-04-03 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981386B (en) * | 2014-04-30 | 2016-04-06 | 苏州有色金属研究院有限公司 | Hypoeutectic and cocrystallized Al-Si alloy go bad and the method for refinement |
| 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 |
| 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 |
| JP7003734B2 (en) * | 2018-02-28 | 2022-01-21 | 東ソー株式会社 | Bulk body containing strontium and its manufacturing method |
| CN109082494A (en) * | 2018-09-14 | 2018-12-25 | 商洛市德新冶金材料有限公司 | A method of utilizing high purity ferrosilicon powder production silicon strontium alloy |
| CN113403497B (en) * | 2021-06-04 | 2022-04-22 | 顺博合金江苏有限公司 | Composite aluminum alloy refining agent and aluminum alloy refining method |
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| CN101660074A (en) * | 2009-09-14 | 2010-03-03 | 芜湖市金贸流体科技股份有限公司 | Modifier for high-strength aluminum alloy and use method thereof |
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