CN103451487B - A kind of containing magnesium Al-30Si aluminium alloy and preparation technology thereof - Google Patents
A kind of containing magnesium Al-30Si aluminium alloy and preparation technology thereof Download PDFInfo
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- CN103451487B CN103451487B CN201310065503.2A CN201310065503A CN103451487B CN 103451487 B CN103451487 B CN 103451487B CN 201310065503 A CN201310065503 A CN 201310065503A CN 103451487 B CN103451487 B CN 103451487B
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Abstract
The invention discloses a kind of containing magnesium Al-30Si aluminium alloy and preparation technology thereof.This aluminium alloy is that to pour into temperature be form in the metal pattern of 200 DEG C for the aluminium alloy melt of 750 DEG C by temperature under atmospheric environment.The preparation of Al-30Si mother alloy adopts well formula resistance furnace melting commercial-purity aluminium (purity >99.8Wt%) and silicon metal (purity >99.5Wt%) in plumbago crucible, at 900 DEG C, be incubated 4 hours, 750 DEG C adopt hexachloroethane alloy liquid carry out refining degasification and be incubated 30 minutes; Magnesium elements employing magnesium ingot (purity >99.9Wt%) is incubated 30 minutes and carries out alloying at 720 DEG C.This aluminum silicon alloy is by primary silicon, Eutectic Silicon in Al-Si Cast Alloys, α-Al and Mg
2the phase composites such as Si, its chemical composition is 30.0Wt%Si, 0.4-1.6Wt%Mg, other is Al, and its tensile strength is 124.1-218.4MPa, hardness is 58.9-108.8HBW, resistivity is 0.35-0.37 Ω m.
Description
Technical field
The present invention relates to a kind of containing magnesium Al-30Si aluminium alloy and preparation technology thereof.
Background technology
High silicon Al-Si alloy is due to its specific tenacity and hardness is high, density is little, anti-corrosion and wear resisting property is strong, high-temperature behavior is good, linear expansivity is little, the capacity of heat transmission is strong, cost is low, is the ideal material of engine piston, accurate wear part and electronic packing piece.But silumin due to primary silicon thick and show fragility, processing characteristics worsens, and its application is restricted.Magnesium elements adds in silumin, can improve the pattern of primary silicon and Eutectic Silicon in Al-Si Cast Alloys, size and distribution on the one hand, can improve the performance of silumin, on the other hand because Mg and Si forms Mg
2si phase, as reinforcement, can further improve the performance of silumin.Therefore, preparation has great importance containing magnesium silumin.
Summary of the invention
The object of the present invention is to provide a kind of containing magnesium Al-30Si aluminium alloy and preparation technology thereof.
The object of the invention is to be achieved through the following technical solutions: a kind of containing magnesium Al-30Si aluminium alloy, it is characterized in that, commercial-purity aluminium (purity >99.8Wt%) and silicon metal (purity >99.5Wt%) is comprised the steps: to put into plumbago crucible, 450 DEG C are warmed up to the heating rate of 10 DEG C/min with well formula resistance furnace, then be warmed up to 900 DEG C of insulations 4 hours with the heating rate of 5 DEG C/min and stir 5 minutes, cool to the speed of 5 DEG C/min hexachloroethane alloy liquid that 750 DEG C of employing plunging add 0.5Wt% again to carry out refining degasification and be incubated 30 minutes, again with the speed of 5 DEG C/min cool to 720 DEG C skim add pure magnesium ingot and stir 5 minutes insulation within 30 minutes, carry out alloying, then with the ramp of 5 DEG C/min to 750 DEG C of insulations 15 minutes and skim, aluminium alloy being poured into temperature is prepare in the metal pattern of 200 DEG C that diameter is 20mm, length is the alloy bar of 200mm.
The product that the present invention makes uses X-ray diffractometer (XRD) and energy spectrometer (EDS) to detect the kind of phase respectively, with scanning electronic microscope (SEM) tissues observed pattern, size and distribution, tensile strength and yield strength is measured with universal electrical trier, measure hardness with digital brinell hardness tester, use four electrode method measured resistivity.
The present invention containing the chemical composition of magnesium silumin be 30.0Wt%Si, 0.4-1.6Wt%Mg, other is Al, its tensile strength is 124.1-218.4MPa, hardness is 58.9-108.8HBW, resistivity is 0.35-0.37 Ω m.
Embodiment
According to specific embodiment, the invention will be further described below:
Embodiment 1
Weigh in the balance and get silicon metal 450g, commercial-purity aluminium 1050g and pure magnesium ingot 60g, commercial-purity aluminium and silicon metal are put into plumbago crucible, plumbago crucible is put into well formula resistance furnace, 450 DEG C are warmed up to the heating rate of 10 DEG C/min, then be warmed up to 900 DEG C of insulations 4 hours and stir 5 minutes with the heating rate of 5 DEG C/min, then cool to 750 DEG C of employing plunging with the speed of 5 DEG C/min and add 7.5g hexachloroethane alloy liquid and carry out refining degasification and be incubated 30 minutes; Again with the speed of 5 DEG C/min cool to 720 DEG C skim add 60g pure magnesium ingot and stir 5 minutes insulation within 30 minutes, carry out alloying; Then with the ramp of 5 DEG C/min to 750 DEG C of insulations 15 minutes and skim, aluminium alloy being poured into temperature is prepare in the metal pattern of 200 DEG C that diameter is 20mm, length is the alloy bar of 200mm.Its tensile strength is 218.4MPa, hardness is 66.8HBW, resistivity is 0.37 Ω m.
Embodiment 2
Weigh in the balance and get silicon metal 450g, commercial-purity aluminium 1050g and pure magnesium ingot 120g, commercial-purity aluminium and silicon metal are put into plumbago crucible, plumbago crucible is put into well formula resistance furnace, 450 DEG C are warmed up to the heating rate of 10 DEG C/min, then be warmed up to 900 DEG C of insulations 4 hours and stir 5 minutes with the heating rate of 5 DEG C/min, then cool to 750 DEG C of employing plunging with the speed of 5 DEG C/min and add 7.5g hexachloroethane alloy liquid and carry out refining degasification and be incubated 30 minutes; Again with the speed of 5 DEG C/min cool to 720 DEG C skim add 120g pure magnesium ingot and stir 5 minutes insulation within 30 minutes, carry out alloying; Then with the ramp of 5 DEG C/min to 750 DEG C of insulations 15 minutes and skim, aluminium alloy being poured into temperature is prepare in the metal pattern of 200 DEG C that diameter is 20mm, length is the alloy bar of 200mm.Its tensile strength is 124.1MPa, hardness is 108.8HBW, resistivity is 0.35 Ω m.
Embodiment 3
Weigh in the balance and get silicon metal 450g, commercial-purity aluminium 1050g and pure magnesium ingot 240g, commercial-purity aluminium and silicon metal are put into plumbago crucible, plumbago crucible is put into well formula resistance furnace, 450 DEG C are warmed up to the heating rate of 10 DEG C/min, then be warmed up to 900 DEG C of insulations 4 hours and stir 5 minutes with the heating rate of 5 DEG C/min, then cool to 750 DEG C of employing plunging with the speed of 5 DEG C/min and add 7.5g hexachloroethane alloy liquid and carry out refining degasification and be incubated 30 minutes; Cool to 720 DEG C with the speed of 5 DEG C/min again to skim to add 240g pure magnesium ingot and stir 5 minutes and be incubated 30 minutes and carry out alloying; Then with the ramp of 5 DEG C/min to 750 DEG C of insulations 15 minutes and skim, aluminium alloy being poured into temperature is prepare in the metal pattern of 200 DEG C that diameter is 20mm, length is the alloy bar of 200mm.Its tensile strength is 192.0MPa, hardness is 58.9HBW, resistivity is 0.37 Ω m.
Claims (2)
1. the preparation technology containing magnesium Al-30Si aluminium alloy, the chemical composition of described aluminium alloy is 30.0wt%Si, 0.4-1.6wt%Mg, other is Al, it is characterized in that, the commercial-purity aluminium of purity >99.8wt% and the silicon metal of purity >99.5wt% is comprised the steps: to put into plumbago crucible, 450 DEG C are warmed up to the heating rate of 10 DEG C/min with well formula resistance furnace, then be warmed up to 900 DEG C of insulations 4 hours with the heating rate of 5 DEG C/min and stir 5 minutes, cool to the speed of 5 DEG C/min hexachloroethane alloy liquid that 750 DEG C of employing plunging add 0.5wt% again to carry out refining degasification and be incubated 30 minutes, again with the speed of 5 DEG C/min cool to 720 DEG C skim add pure magnesium ingot and stir 5 minutes insulation within 30 minutes, carry out alloying, then with the ramp of 5 DEG C/min to 750 DEG C of insulations 15 minutes and skim, aluminium alloy being poured into temperature is prepare in the metal pattern of 200 DEG C that diameter is 20mm, length is the alloy bar of 200mm.
2. the preparation technology of aluminium alloy according to claim 1, is characterized in that, the tensile strength of described aluminium alloy is 124.1-218.4MPa, hardness is 58.9-108.8HBW, resistivity is 0.35-0.37 Ω m.
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| CN201310065503.2A CN103451487B (en) | 2013-03-01 | 2013-03-01 | A kind of containing magnesium Al-30Si aluminium alloy and preparation technology thereof |
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| CN103451487B true CN103451487B (en) | 2015-09-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106399765B (en) * | 2016-10-11 | 2019-02-26 | 湖南理工学院 | Al-Si-Mg aluminium alloy and its preparation process |
| CN111074116A (en) * | 2020-01-16 | 2020-04-28 | 苏州先准电子科技有限公司 | Electronic packaging high-silicon aluminum-based composite material and preparation method thereof |
| CN111020308A (en) * | 2020-01-16 | 2020-04-17 | 苏州先准电子科技有限公司 | Novel electronic packaging high-silicon aluminum alloy and preparation method thereof |
| CN112453422B (en) * | 2020-10-27 | 2021-07-30 | 中南大学 | Light Al-Si-Mg2Si electronic packaging material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462166A (en) * | 2007-12-20 | 2009-06-24 | 北京有色金属研究总院 | Method for preparing spray forming hypereutectic aluminum silicon alloy |
| CN102373351A (en) * | 2011-10-26 | 2012-03-14 | 昆明理工大学 | Method for preparing high-purity silicon and aluminum silicon alloy by electromagnetic method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462166A (en) * | 2007-12-20 | 2009-06-24 | 北京有色金属研究总院 | Method for preparing spray forming hypereutectic aluminum silicon alloy |
| CN102373351A (en) * | 2011-10-26 | 2012-03-14 | 昆明理工大学 | Method for preparing high-purity silicon and aluminum silicon alloy by electromagnetic method |
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