CN103695743A - Magnesium alloy and preparation method thereof - Google Patents
Magnesium alloy and preparation method thereof Download PDFInfo
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Abstract
The invention provides a magnesium alloy. The magnesium alloy contains the ingredients in percentage by weight: 0.35-0.45% of Gd, 2.7-3.3% of Al, 2.0-2.15% of Zn, 3.65-3.75% of Si, 0.9-1.0% of Ca, 1.05-1.1% of Sr, 0.35-0.55% of Nd, 0.45-0.654% of Zr, 0.8-0.9% of Sn, 0.11-0.14% of Be, 1.1-1.3% of Mn, 0.2-0.4% of Sb, 0.25-0.31% of Cu and the balance of Mg. The invention further provides a preparation method of the alloy. The alloy has good mechanical properties.
Description
Technical field
The invention belongs to magnesium alloy materials field, especially a kind of magnesium alloy and preparation method thereof.
Background technology
The crystalline structure of magnesium alloy belongs to hexagonal close packed lattice, its plastic deformation ability is not as good as aluminium and steel, difficulty and the manufacture cost of magnesium alloy plastic working have been increased, for this reason in novel magnesium alloy development research in recent years, started to pay attention to designing mutually and adopt the modes such as new deformation technique by wrought magnesium alloys interalloy, when guaranteeing some strength, more focused on improving the plastic working ability of magnesium alloy.
Due to magnesium alloy, to have density little, specific rigidity and specific tenacity are high, and there are excellent heat conductivity performance, capability of electromagnetic shielding, damping capacity, machinability and a damping performance, there is the series of advantages such as dimensional stabilizing, pollution-free, easy recovery simultaneously, be structure lightweight ideal material, in the industry such as automobile, aerospace, national defence and 3C Product, have wide commercial application prospect.Yet because magnesium alloy absolute strength is low, deformation at room temperature ability is poor, oxidizable burning, the defect such as perishable, limited its widespread use as structured material, and it is extensive that the application of magnesium alloy at present can not show a candle to aluminium alloy.Therefore, improving magnesium alloy strength and make it have good over-all properties, is the focus of novel magnesium alloy exploitation, and high-strength magnesium alloy exploitation is simultaneously significant to the Application Areas of expansion magnesium alloy.
Summary of the invention
The problem existing for prior art, the invention provides a kind of high-strength magnesium alloy and preparation method thereof, this processing method cost is low and simple and easy to do, and the magnesium alloy of acquisition has higher intensity, makes this type of magnesium alloy have the mechanical property more superior than traditional commerce magnesium alloy.
For reaching this object, the present invention by the following technical solutions:
A magnesium alloy, contains according to weight percent content: Gd:0.35-0.45%, Al:2.7-3.3%, Zn:2.0-2.15%, Si:3.65-3.75%, Ca:0.9-1.0%, Sr:1.05-1.1%, Nd:0.35-0.55%, Zr:0.45-0.654%, Sn:0.8-0.9%, Be:0.11-0.14%, Mn:1.1-1.3%, Sb:0.2-0.4%, Cu:0.25-0.31%, surplus is Mg.
Further, according to weight percent content, contain: Gd:0.38%, Al:2.8%, Zn:2.1%, Si:3.68%, Ca:0.9%, Sr:1.08%, Nd:0.37%, Zr:0.52%, Sn:0.85%, Be:0.125%, Mn:1.26%, Sb:0.23%, Cu:0.28%, surplus is Mg.
In addition, also provide a kind of preparation method of described magnesium alloy, comprise the following steps:
(1) raw material is prepared: according to weight percent content, carry out raw material preparation, described raw material is pure Mg ingot, Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy;
(2) melting: adopt gas atmosphere molten alloy in resistance furnace, smelting temperature is 735-760 ℃, first in smelting furnace, add pure Mg ingot, after pure magnesium ingot melts completely, add Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy, after all raw materials melt completely, stir, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 775 ℃～790 ℃ alloys and carry out refining, add while stirring heat resistance magnesium alloy refining agent, refining time is 1-4 minute, after refining is complete standing 5～8 minutes of 730 ℃～740 ℃ insulations, the consisting of of described heat resistance magnesium alloy refining agent: NaCl:11%～15%; Na3AlF6:8～10%; MgCl2:30-40%; Surplus is KCl;
(4) casting: it is that in the swage tool of 180～230 ℃, pouring temperature is 725 ℃～735 ℃ that the magnesium alloy refining material of melting is cast to preheating temperature; Foundry goods specification is Ф 450mm～Ф 500mm, length >=3000mm
(5) thermal treatment: foundry goods is carried out to solution treatment in 425-430 ℃ of temperature range, and the solution treatment time is 16～24 hours, then carries out shrend, puts into the foundry goods after quenching in the resistance furnace of 200 ℃ artificial aging 40 hours, makes magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 400 ℃～440 ℃ insulation 1～2h; Carry out two to hammer cogging, be forged into the slab that thickness is 40-60mm; Reduction in pass is 20%～40%, and every 3-6 passage is forged after annealing 1.5h, and annealing temperature is 400 ℃～440 ℃; B. heated roll to temperature is 300-340 ℃; C. heating slab to temperature is 450-460 ℃, is incubated after 20-30 minute, adopts the method for multi-pass small deformation amount that heavy plate rolling is become to 2～10mm thin plate, and the speed of rolls is 0.4m/s～0.8 m/s; Every time rolling draught is 10%～20%, after every time rolling, melts down annealing, and annealing temperature is 400 ℃～440 ℃, and annealing time is 30min～40min;
(7) roll postheat treatment: the thin plate after rolling is carried out to ageing treatment, and described aging treatment process is: aging temp is 225-240 ℃, soaking time is 12-36h; At 195-210 ℃, carry out ageing treatment for the second time again, aging time is 12-36h; Finally at 140-170 ℃, carry out ageing treatment for the third time, aging time is 12-36h.
Embodiment
embodiment 1
A magnesium alloy, contains according to weight percent content: Gd:0.35%, Al:2.9%, Zn:2.1%, Si:3.66%, Ca:0.92%, Sr:1.07%, Nd:0.41%, Zr:0.48%, Sn:0.88%, Be:0.125%, Mn:1.24%, Sb:0.38%, Cu:0.29%, surplus is Mg.
The preparation method of magnesium alloy, comprises the following steps:
(1) raw material is prepared: according to weight percent content, carry out raw material preparation, described raw material is pure Mg ingot, Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy;
(2) melting: adopt gas atmosphere molten alloy in resistance furnace, smelting temperature is 755 ℃, first in smelting furnace, add pure Mg ingot, after pure magnesium ingot melts completely, add Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy, after all raw materials melt completely, stir, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 785 ℃ of alloys and carry out refining, add while stirring heat resistance magnesium alloy refining agent, refining time is 3 minutes, after refining is complete standing 6 minutes of 735 ℃ of insulations, the consisting of of described heat resistance magnesium alloy refining agent: NaCl:13%; Na3AlF6:9%; MgCl2:32%; Surplus is KCl;
(4) casting: it is that in the swage tool of 195 ℃, pouring temperature is 730 ℃ that the magnesium alloy refining material of melting is cast to preheating temperature; Foundry goods specification is Ф 480mm, length 3500mm
(5) thermal treatment: foundry goods is carried out to solution treatment in 428 ℃ of temperature ranges, and the solution treatment time is 18 hours, then carries out shrend, puts into the foundry goods after quenching in the resistance furnace of 200 ℃ artificial aging 40 hours, makes magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 420 ℃ of insulation 1.5h; Carry out two to hammer cogging, be forged into the slab that thickness is 50mm; Reduction in pass is 30%, and every 3 passages are forged after annealing 1.5h, and annealing temperature is 420 ℃; B. heated roll to temperature is 330 ℃; C. heating slab to temperature is 455 ℃, is incubated after 25 minutes, adopts the method for multi-pass small deformation amount that heavy plate rolling is become to 3.5mm thin plate, and the speed of rolls is 0.6 m/s; Every time rolling draught is 15%, after every time rolling, melts down annealing, and annealing temperature is 420 ℃, and annealing time is 35min;
(7) roll postheat treatment: the thin plate after rolling is carried out to ageing treatment, and described aging treatment process is: aging temp is 240 ℃, soaking time is 15h; At 200 ℃, carry out ageing treatment for the second time again, aging time is 15h; Finally at 150 ℃, carry out ageing treatment for the third time, aging time is 15h.
embodiment 2:
A magnesium alloy, contains according to weight percent content: Gd:0.38%, Al:2.89%, Zn:2.13%, Si:3.69%, Ca:0.92%, Sr:1.09%, Nd:0.45%, Zr:0.47%, Sn:0.88%, Be:0.13%, Mn:1.2%, Sb:0.28%, Cu:0.29%, surplus is Mg.
The preparation method of described magnesium alloy, comprises the following steps:
(1) raw material is prepared: according to weight percent content, carry out raw material preparation, described raw material is pure Mg ingot, Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy;
(2) melting: adopt gas atmosphere molten alloy in resistance furnace, smelting temperature is 746 ℃, first in smelting furnace, add pure Mg ingot, after pure magnesium ingot melts completely, add Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy, after all raw materials melt completely, stir, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 780 ℃ of alloys and carry out refining, add while stirring heat resistance magnesium alloy refining agent, refining time is 4 minutes, after refining is complete standing 6 minutes of 738 ℃ of insulations, the consisting of of described heat resistance magnesium alloy refining agent: NaCl:11%; Na3AlF6:9.5%; MgCl2:38%; Surplus is KCl;
(4) casting: it is that in the swage tool of 195 ℃, pouring temperature is 730 ℃ that the magnesium alloy refining material of melting is cast to preheating temperature; Foundry goods specification is Ф 475mm, length 3200mm
(5) thermal treatment: foundry goods is carried out to solution treatment in 428 ℃ of temperature ranges, and the solution treatment time is 18 hours, then carries out shrend, puts into the foundry goods after quenching in the resistance furnace of 200 ℃ artificial aging 40 hours, makes magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 420 ℃ of insulation 1.5h; Carry out two to hammer cogging, be forged into the slab that thickness is 45mm; Reduction in pass is 25%, and every 4 passages are forged after annealing 1.5h, and annealing temperature is 420 ℃; B. heated roll to temperature is 320 ℃; C. heating slab to temperature is 455 ℃, is incubated after 25 minutes, adopts the method for multi-pass small deformation amount that heavy plate rolling is become to 6mm thin plate, and the speed of rolls is 0.5 m/s; Every time rolling draught is 18%, after every time rolling, melts down annealing, and annealing temperature is 420 ℃, and annealing time is 36min;
(7) roll postheat treatment: the thin plate after rolling is carried out to ageing treatment, and described aging treatment process is: aging temp is 230 ℃, soaking time is 18h; At 197 ℃, carry out ageing treatment for the second time again, aging time is 18h; Finally at 145 ℃, carry out ageing treatment for the third time, aging time is 18h.
embodiment 3:
A magnesium alloy, contains according to weight percent content: Gd:0.38%, Al:2.8%, Zn:2.1%, Si:3.68%, Ca:0.9%, Sr:1.08%, Nd:0.37%, Zr:0.52%, Sn:0.85%, Be:0.125%, Mn:1.26%, Sb:0.23%, Cu:0.28%, surplus is Mg.
The preparation method of described magnesium alloy, comprises the following steps:
(1) raw material is prepared: according to weight percent content, carry out raw material preparation, described raw material is pure Mg ingot, Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy;
(2) melting: adopt gas atmosphere molten alloy in resistance furnace, smelting temperature is 45 ℃, first in smelting furnace, add pure Mg ingot, after pure magnesium ingot melts completely, add Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy, after all raw materials melt completely, stir, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 780 ℃ of alloys and carry out refining, add while stirring heat resistance magnesium alloy refining agent, refining time is 3.5 minutes, after refining is complete standing 6 minutes of 735 ℃ of insulations, the consisting of of described heat resistance magnesium alloy refining agent: NaCl:14.8%; Na3AlF6:8.5%; MgCl2:36%; Surplus is KCl;
(4) casting: it is that in the swage tool of 190 ℃, pouring temperature is 730 ℃ that the magnesium alloy refining material of melting is cast to preheating temperature; Foundry goods specification is Ф 450mm, length 3000mm
(5) thermal treatment: foundry goods is carried out to solution treatment in 427 ℃ of temperature ranges, and the solution treatment time is 18 hours, then carries out shrend, puts into the foundry goods after quenching in the resistance furnace of 200 ℃ artificial aging 40 hours, makes magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 425 ℃ of insulation 1.5h; Carry out two to hammer cogging, be forged into the slab that thickness is 45mm; Reduction in pass is 30%, and every 5 passages are forged after annealing 1.5h, and annealing temperature is 420 ℃; B. heated roll to temperature is 320 ℃; C. heating slab to temperature is 455 ℃, is incubated after 25 minutes, adopts the method for multi-pass small deformation amount that heavy plate rolling is become to 4mm thin plate, and the speed of rolls is 0.5 m/s; Every time rolling draught is 15%, after every time rolling, melts down annealing, and annealing temperature is 420 ℃, and annealing time is 35min;
(7) roll postheat treatment: the thin plate after rolling is carried out to ageing treatment, and described aging treatment process is: aging temp is 230 ℃, soaking time is 15h; At 200 ℃, carry out ageing treatment for the second time again, aging time is 15h; Finally at 165 ℃, carry out ageing treatment for the third time, aging time is 16h.
the performance of the alloy that embodiment 1-3 obtains is listed in the table below
Claims (3)
1. a magnesium alloy, is characterized in that: according to weight percent content, contain: Gd:0.35-0.45%, Al:2.7-3.3%, Zn:2.0-2.15%, Si:3.65-3.75%, Ca:0.9-1.0%, Sr:1.05-1.1%, Nd:0.35-0.55%, Zr:0.45-0.654%, Sn:0.8-0.9%, Be:0.11-0.14%, Mn:1.1-1.3%, Sb:0.2-0.4%, Cu:0.25-0.31%, surplus is Mg.
2. magnesium alloy as claimed in claim 1, is characterized in that: according to weight percent content, contain: Gd:0.38%, Al:2.8%, Zn:2.1%, Si:3.68%, Ca:0.9%, Sr:1.08%, Nd:0.37%, Zr:0.52%, Sn:0.85%, Be:0.125%, Mn:1.26%, Sb:0.23%, Cu:0.28%, surplus is Mg.
3. a preparation method for the magnesium alloy as described in claim 1-2, is characterized in that:
(1) raw material is prepared: according to weight percent content, carry out raw material preparation, described raw material is pure Mg ingot, Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy;
(2) melting: adopt gas atmosphere molten alloy in resistance furnace, smelting temperature is 735-760 ℃, first in smelting furnace, add pure Mg ingot, after pure magnesium ingot melts completely, add Mg-Gd master alloy, pure Al ingot, pure Zn, Al-Si master alloy, Al-Ca master alloy, Al-Sr master alloy, Mg-Nd master alloy, Mg-Zr master alloy, pure Sn, Al-Be master alloy, Al-Mn master alloy, pure Sb, Al-Cu master alloy, after all raw materials melt completely, stir, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 775 ℃～790 ℃ alloys and carry out refining, add while stirring heat resistance magnesium alloy refining agent, refining time is 1-4 minute, after refining is complete standing 5～8 minutes of 730 ℃～740 ℃ insulations, the consisting of of described heat resistance magnesium alloy refining agent: NaCl:11%～15%; Na3AlF6:8～10%; MgCl2:30-40%; Surplus is KCl;
(4) casting: it is that in the swage tool of 180～230 ℃, pouring temperature is 725 ℃～735 ℃ that the magnesium alloy refining material of melting is cast to preheating temperature; Foundry goods specification is Ф 450mm～Ф 500mm, length >=3000mm
(5) thermal treatment: foundry goods is carried out to solution treatment in 425-430 ℃ of temperature range, and the solution treatment time is 16～24 hours, then carries out shrend, puts into the foundry goods after quenching in the resistance furnace of 200 ℃ artificial aging 40 hours, makes magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 400 ℃～440 ℃ insulation 1～2h; Carry out two to hammer cogging, be forged into the slab that thickness is 40-60mm; Reduction in pass is 20%～40%, and every 3-6 passage is forged after annealing 1.5h, and annealing temperature is 400 ℃～440 ℃; B. heated roll to temperature is 300-340 ℃; C. heating slab to temperature is 450-460 ℃, is incubated after 20-30 minute, adopts the method for multi-pass small deformation amount that heavy plate rolling is become to 2～10mm thin plate, and the speed of rolls is 0.4m/s～0.8 m/s; Every time rolling draught is 10%～20%, after every time rolling, melts down annealing, and annealing temperature is 400 ℃～440 ℃, and annealing time is 30min～40min;
(7) roll postheat treatment: the thin plate after rolling is carried out to ageing treatment, and described aging treatment process is: aging temp is 225-240 ℃, soaking time is 12-36h; At 195-210 ℃, carry out ageing treatment for the second time again, aging time is 12-36h; Finally at 140-170 ℃, carry out ageing treatment for the third time, aging time is 12-36h.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104099505A (en) * | 2014-08-06 | 2014-10-15 | 农彩丽 | Wrought magnesium alloy and preparation method thereof |
| CN104099506A (en) * | 2014-08-06 | 2014-10-15 | 杨攀 | Multicomponent heat-resistant magnesium alloy and production method thereof |
| CN104099504A (en) * | 2014-08-06 | 2014-10-15 | 农彩丽 | High-strength magnesium alloy and production method thereof |
| CN104264018A (en) * | 2014-10-31 | 2015-01-07 | 农彩丽 | Aluminum alloy and manufacturing method thereof |
| CN104278183A (en) * | 2014-10-31 | 2015-01-14 | 杨攀 | Die-casting magnesium alloy and preparation process thereof |
| CN104357716A (en) * | 2014-11-26 | 2015-02-18 | 农彩丽 | Heat-resistant and anti-creep aluminium-magnesium alloy and preparation process thereof |
| CN105220047A (en) * | 2015-10-22 | 2016-01-06 | 太原理工大学 | A kind of preparation method of rare earth enhanced magnesium-aluminum gadolinium tin alloy plate |
| CN105385921B (en) * | 2015-12-22 | 2017-05-31 | 太原理工大学 | A kind of preparation method of high-strength micro-alloy magnesium alloy ingot |
| CN109680194A (en) * | 2019-02-22 | 2019-04-26 | 山东省科学院新材料研究所 | A kind of high-intensitive extrudate preparation method of Mg-Zn-Sn-Mn alloy |
| TWI685572B (en) * | 2018-12-04 | 2020-02-21 | 國立中興大學 | Melting of pure silicon in liquid magnesium and a fabricating method of magnesium-based thermoelectric materials |
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| CN1386881A (en) * | 2002-04-16 | 2002-12-25 | 太原理工大学 | Pelletted Si-phase Mg-base alloy and its preparing process |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1386881A (en) * | 2002-04-16 | 2002-12-25 | 太原理工大学 | Pelletted Si-phase Mg-base alloy and its preparing process |
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| CN104099504B (en) * | 2014-08-06 | 2016-08-17 | 王艳 | A kind of high-strength magnesium alloy and preparation method thereof |
| CN104099506A (en) * | 2014-08-06 | 2014-10-15 | 杨攀 | Multicomponent heat-resistant magnesium alloy and production method thereof |
| CN104099504A (en) * | 2014-08-06 | 2014-10-15 | 农彩丽 | High-strength magnesium alloy and production method thereof |
| CN104099505A (en) * | 2014-08-06 | 2014-10-15 | 农彩丽 | Wrought magnesium alloy and preparation method thereof |
| CN104099505B (en) * | 2014-08-06 | 2016-06-15 | 衢州市联橙环保科技有限公司 | A kind of wrought magnesium alloy and preparation method thereof |
| CN104264018A (en) * | 2014-10-31 | 2015-01-07 | 农彩丽 | Aluminum alloy and manufacturing method thereof |
| CN104278183A (en) * | 2014-10-31 | 2015-01-14 | 杨攀 | Die-casting magnesium alloy and preparation process thereof |
| CN104357716A (en) * | 2014-11-26 | 2015-02-18 | 农彩丽 | Heat-resistant and anti-creep aluminium-magnesium alloy and preparation process thereof |
| CN105220047A (en) * | 2015-10-22 | 2016-01-06 | 太原理工大学 | A kind of preparation method of rare earth enhanced magnesium-aluminum gadolinium tin alloy plate |
| CN105220047B (en) * | 2015-10-22 | 2017-03-08 | 太原理工大学 | A kind of preparation method of rare earth enhanced magnesium-aluminum gadolinium tin alloy plate |
| CN105385921B (en) * | 2015-12-22 | 2017-05-31 | 太原理工大学 | A kind of preparation method of high-strength micro-alloy magnesium alloy ingot |
| TWI685572B (en) * | 2018-12-04 | 2020-02-21 | 國立中興大學 | Melting of pure silicon in liquid magnesium and a fabricating method of magnesium-based thermoelectric materials |
| CN109680194A (en) * | 2019-02-22 | 2019-04-26 | 山东省科学院新材料研究所 | A kind of high-intensitive extrudate preparation method of Mg-Zn-Sn-Mn alloy |
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