CN103695743B - A kind of magnesium alloy and preparation method thereof - Google Patents
A kind of magnesium alloy and preparation method thereof Download PDFInfo
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- CN103695743B CN103695743B CN201410018651.3A CN201410018651A CN103695743B CN 103695743 B CN103695743 B CN 103695743B CN 201410018651 A CN201410018651 A CN 201410018651A CN 103695743 B CN103695743 B CN 103695743B
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Abstract
The invention provides a kind of magnesium alloy, contain 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.The present invention also proposes the preparation method of this alloy.This alloy has excellent mechanical performances.
Description
Technical field
The invention belongs to field of magnesium alloy material, 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, add difficulty and the manufacture cost of magnesium alloy plastic working, for this reason in novel magnesium alloy development research in recent years, start to pay attention to being designed mutually by wrought magnesium alloys interalloy and adopting the modes such as new deformation technique, while ensureing some strength, more focused on the plastic working ability improving magnesium alloy.
Due to magnesium alloy, to have density little, specific rigidity and specific tenacity high, and have excellent heat conductivity performance, capability of electromagnetic shielding, damping capacity, machinability and damping performance, there is the series of advantages such as dimensional stabilizing, pollution-free, easy recovery simultaneously, be structure lightened ideal material, in the industry such as automobile, aerospace, national defence and 3C Product, have wide commercial application prospect.But due to magnesium alloy absolute strength low, deformation at room temperature ability is poor, oxidizable burning, the defect such as perishable, limits its widespread use as structured material, and it is extensive that the application of current magnesium alloy 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 expanding magnesium alloy.
Summary of the invention
For prior art Problems existing, 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 kind of 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, contain 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.
In addition, a kind of preparation method of described magnesium alloy is also provided, comprises the following steps:
(1) raw material prepares: carry out raw material preparation according to weight percent content, 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 DEG C, 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, stir after all raw materials melt completely, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 775 DEG C ~ 790 DEG C alloys and carry out refining, add heat resistance magnesium alloy refining agent while stirring, refining time is 1-4 minute, 5 ~ 8 minutes are left standstill, consisting of of described heat resistance magnesium alloy refining agent: NaCl:11% ~ 15% 730 DEG C ~ 740 DEG C insulations after refining is complete; Na3AlF6:8 ~ 10%; MgCl2:30-40%; Surplus is KCl;
(4) cast: the magnesium alloy refining material of melting being cast to preheating temperature is in the swage tool of 180 ~ 230 DEG C, and pouring temperature is 725 DEG C ~ 735 DEG C; Cast gauge is Ф 450mm ~ Ф 500mm, length >=3000mm
(5) thermal treatment: foundry goods is carried out solution treatment in 425-430 DEG C of temperature range, the solution treatment time is 16 ~ 24 hours, then carry out shrend, the foundry goods after quenching to be put in the resistance furnace of 200 DEG C artificial aging 40 hours, obtained magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 400 DEG C ~ 440 DEG C 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%, every 3-6 passage forging after annealing 1.5h, and annealing temperature is 400 DEG C ~ 440 DEG C; B. heated roll to temperature is 300-340 DEG C; C. heating slab to temperature is 450-460 DEG C, is incubated after 20-30 minute, and adopt the method for multi-pass small deformation amount that heavy plate rolling is become 2 ~ 10mm thin plate, the speed of rolls is 0.4m/s ~ 0.8m/s; Every time roll reduction is 10% ~ 20%, melts down annealing after every time rolling, and annealing temperature is 400 DEG C ~ 440 DEG C, and annealing time is 30min ~ 40min;
(7) roll postheat treatment: the thin plate after rolling is carried out ageing treatment, and described aging treatment process is: aging temp is 225-240 DEG C, soaking time is 12-36h; Carry out second time ageing treatment at 195-210 DEG C again, aging time is 12-36h; Finally carry out third time ageing treatment at 140-170 DEG C, aging time is 12-36h.
Embodiment
embodiment 1
A kind of 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 prepares: carry out raw material preparation according to weight percent content, 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 DEG C, 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, stir after all raw materials melt completely, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 785 DEG C of alloys and carry out refining, add heat resistance magnesium alloy refining agent while stirring, refining time is 3 minutes, leaves standstill 6 minutes, consisting of of described heat resistance magnesium alloy refining agent: NaCl:13% after refining is complete 735 DEG C of insulations; Na3AlF6:9%; MgCl2:32%; Surplus is KCl;
(4) cast: the magnesium alloy refining material of melting being cast to preheating temperature is in the swage tool of 195 DEG C, and pouring temperature is 730 DEG C; Cast gauge is Ф 480mm, length 3500mm
(5) thermal treatment: foundry goods is carried out solution treatment in 428 DEG C of temperature ranges, the solution treatment time is 18 hours, then carries out shrend, and the foundry goods after quenching to be put in the resistance furnace of 200 DEG C artificial aging 40 hours, obtained magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 420 DEG C of insulation 1.5h; Carry out two to hammer cogging, be forged into the slab that thickness is 50mm; Reduction in pass is 30%, every 3 passage forging after annealing 1.5h, and annealing temperature is 420 DEG C; B. heated roll to temperature is 330 DEG C; C. heating slab to temperature is 455 DEG C, is incubated after 25 minutes, and adopt the method for multi-pass small deformation amount that heavy plate rolling is become 3.5mm thin plate, the speed of rolls is 0.6m/s; Every time roll reduction is 15%, melts down annealing after every time rolling, and annealing temperature is 420 DEG C, and annealing time is 35min;
(7) roll postheat treatment: the thin plate after rolling is carried out ageing treatment, and described aging treatment process is: aging temp is 240 DEG C, soaking time is 15h; Carry out second time ageing treatment at 200 DEG C again, aging time is 15h; Finally carry out third time ageing treatment at 150 DEG C, aging time is 15h.
embodiment 2:
A kind of 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 prepares: carry out raw material preparation according to weight percent content, 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 DEG C, 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, stir after all raw materials melt completely, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 780 DEG C of alloys and carry out refining, add heat resistance magnesium alloy refining agent while stirring, refining time is 4 minutes, leaves standstill 6 minutes, consisting of of described heat resistance magnesium alloy refining agent: NaCl:11% after refining is complete 738 DEG C of insulations; Na3AlF6:9.5%; MgCl2:38%; Surplus is KCl;
(4) cast: the magnesium alloy refining material of melting being cast to preheating temperature is in the swage tool of 195 DEG C, and pouring temperature is 730 DEG C; Cast gauge is Ф 475mm, length 3200mm
(5) thermal treatment: foundry goods is carried out solution treatment in 428 DEG C of temperature ranges, the solution treatment time is 18 hours, then carries out shrend, and the foundry goods after quenching to be put in the resistance furnace of 200 DEG C artificial aging 40 hours, obtained magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 420 DEG C of insulation 1.5h; Carry out two to hammer cogging, be forged into the slab that thickness is 45mm; Reduction in pass is 25%, every 4 passage forging after annealing 1.5h, and annealing temperature is 420 DEG C; B. heated roll to temperature is 320 DEG C; C. heating slab to temperature is 455 DEG C, is incubated after 25 minutes, and adopt the method for multi-pass small deformation amount that heavy plate rolling is become 6mm thin plate, the speed of rolls is 0.5m/s; Every time roll reduction is 18%, melts down annealing after every time rolling, and annealing temperature is 420 DEG C, and annealing time is 36min;
(7) roll postheat treatment: the thin plate after rolling is carried out ageing treatment, and described aging treatment process is: aging temp is 230 DEG C, soaking time is 18h; Carry out second time ageing treatment at 197 DEG C again, aging time is 18h; Finally carry out third time ageing treatment at 145 DEG C, aging time is 18h.
embodiment 3:
A kind of 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 prepares: carry out raw material preparation according to weight percent content, 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 DEG C, 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, stir after all raw materials melt completely, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 780 DEG C of alloys and carry out refining, add heat resistance magnesium alloy refining agent while stirring, refining time is 3.5 minutes, leaves standstill 6 minutes, consisting of of described heat resistance magnesium alloy refining agent: NaCl:14.8% after refining is complete 735 DEG C of insulations; Na3AlF6:8.5%; MgCl2:36%; Surplus is KCl;
(4) cast: the magnesium alloy refining material of melting being cast to preheating temperature is in the swage tool of 190 DEG C, and pouring temperature is 730 DEG C; Cast gauge is Ф 450mm, length 3000mm
(5) thermal treatment: foundry goods is carried out solution treatment in 427 DEG C of temperature ranges, the solution treatment time is 18 hours, then carries out shrend, and the foundry goods after quenching to be put in the resistance furnace of 200 DEG C artificial aging 40 hours, obtained magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 425 DEG C of insulation 1.5h; Carry out two to hammer cogging, be forged into the slab that thickness is 45mm; Reduction in pass is 30%, every 5 passage forging after annealing 1.5h, and annealing temperature is 420 DEG C; B. heated roll to temperature is 320 DEG C; C. heating slab to temperature is 455 DEG C, is incubated after 25 minutes, and adopt the method for multi-pass small deformation amount that heavy plate rolling is become 4mm thin plate, the speed of rolls is 0.5m/s; Every time roll reduction is 15%, melts down annealing after every time rolling, and annealing temperature is 420 DEG C, and annealing time is 35min;
(7) roll postheat treatment: the thin plate after rolling is carried out ageing treatment, and described aging treatment process is: aging temp is 230 DEG C, soaking time is 15h; Carry out second time ageing treatment at 200 DEG C again, aging time is 15h; Finally carry out third time ageing treatment at 165 DEG C, 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: contain 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.
2. magnesium alloy as claimed in claim 1, is characterized in that: contain 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.
3. a preparation method for magnesium alloy as claimed in claim 1 or 2, is characterized in that:
(1) raw material prepares: carry out raw material preparation according to weight percent content, 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 DEG C, 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, stir after all raw materials melt completely, make alloying constituent even;
(3) refining: make smelting furnace be warming up to 775 DEG C ~ 790 DEG C alloys and carry out refining, add heat resistance magnesium alloy refining agent while stirring, refining time is 1-4 minute, 5 ~ 8 minutes are left standstill, consisting of of described heat resistance magnesium alloy refining agent: NaCl:11% ~ 15% 730 DEG C ~ 740 DEG C insulations after refining is complete; Na
3alF
6: 8 ~ 10%; MgCl
2: 30-40%; Surplus is KCl;
(4) cast: the magnesium alloy refining material of melting being cast to preheating temperature is in the swage tool of 180 ~ 230 DEG C, and pouring temperature is 725 DEG C ~ 735 DEG C; Cast gauge is Ф 450mm ~ Ф 500mm, length >=3000mm;
(5) thermal treatment: foundry goods is carried out solution treatment in 425-430 DEG C of temperature range, the solution treatment time is 16 ~ 24 hours, then carry out shrend, the foundry goods after quenching to be put in the resistance furnace of 200 DEG C artificial aging 40 hours, obtained magnesium alloy blank;
(6) deformation process: a. high temperature forging cogging: heating blank to temperature is 400 DEG C ~ 440 DEG C 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%, every 3-6 passage forging after annealing 1.5h, and annealing temperature is 400 DEG C ~ 440 DEG C; B. heated roll to temperature is 300-340 DEG C; C. heating slab to temperature is 450-460 DEG C, is incubated after 20-30 minute, and adopt the method for multi-pass small deformation amount that heavy plate rolling is become 2 ~ 10mm thin plate, the speed of rolls is 0.4m/s ~ 0.8m/s; Every time roll reduction is 10% ~ 20%, melts down annealing after every time rolling, and annealing temperature is 400 DEG C ~ 440 DEG C, and annealing time is 30min ~ 40min;
(7) roll postheat treatment: the thin plate after rolling is carried out ageing treatment, and described aging treatment process is: aging temp is 225-240 DEG C, soaking time is 12-36h; Carry out second time ageing treatment at 195-210 DEG C again, aging time is 12-36h; Finally carry out third time ageing treatment at 140-170 DEG C, aging time is 12-36h.
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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 |
| 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 |
| CN104099506B (en) * | 2014-08-06 | 2016-08-24 | 海门市中德电子发展有限公司 | A kind of multicomponent heat-resistant magnesium alloy and preparation method thereof |
| CN104264018A (en) * | 2014-10-31 | 2015-01-07 | 农彩丽 | Aluminum alloy and manufacturing method thereof |
| CN104278183B (en) * | 2014-10-31 | 2016-09-28 | 胡贤晨 | A kind of diecast magnesium alloy and processing technology thereof |
| CN104357716A (en) * | 2014-11-26 | 2015-02-18 | 农彩丽 | Heat-resistant and anti-creep aluminium-magnesium alloy and preparation process thereof |
| 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 |
| CN109680194B (en) * | 2019-02-22 | 2020-01-14 | 山东省科学院新材料研究所 | Preparation method of high-strength extruded section of Mg-Zn-Sn-Mn alloy |
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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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