CN104178673B - 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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- CN104178673B CN104178673B CN201410463164.8A CN201410463164A CN104178673B CN 104178673 B CN104178673 B CN 104178673B CN 201410463164 A CN201410463164 A CN 201410463164A CN 104178673 B CN104178673 B CN 104178673B
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 91
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 90
- 239000011777 magnesium Substances 0.000 claims abstract description 19
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 19
- 229910052802 copper Inorganic materials 0.000 claims abstract description 18
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 8
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 8
- 238000000137 annealing Methods 0.000 claims description 30
- 239000002994 raw material Substances 0.000 claims description 25
- 238000007670 refining Methods 0.000 claims description 15
- 229910018131 Al-Mn Inorganic materials 0.000 claims description 10
- 229910018125 Al-Si Inorganic materials 0.000 claims description 10
- 229910018185 Al—Co Inorganic materials 0.000 claims description 10
- 229910018461 Al—Mn Inorganic materials 0.000 claims description 10
- 229910018520 Al—Si Inorganic materials 0.000 claims description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 229910019083 Mg-Ni Inorganic materials 0.000 claims description 10
- 229910019403 Mg—Ni Inorganic materials 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005482 strain hardening Methods 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- -1 Al-Mo Alloy Inorganic materials 0.000 claims 1
- 239000011701 zinc Substances 0.000 description 14
- 239000011572 manganese Substances 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Conductive Materials (AREA)
Abstract
The invention provides a kind of magnesium alloy, contain according to weight percent content: Al:5.2 6.2%, Cr:3.1 3.7%, Co:0.9 1.1%, Cu:2.1 2.4%, Mn:0.9 1.0%, Mo:1.05 1.1%, Ni:1.2 1.4%, W:0.5 0.7%, V:0.8 0.9%, Zn:0.11 0.14%, Si:1.1 1.3%, Ca:1.5 1.7%, Sr:1.7 1.9% surplus be 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
Magnesium alloy adds the alloy of other elements composition with magnesium for base.Being characterized in: density is little, specific strength is high, springform
Amount is big, and shock absorbing is good, and the load-carrying ability that withstands shocks is bigger than aluminium alloy, and the corrosive nature of resistance to organic matter and alkali is good, major alloy unit
Have aluminium, zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium etc..Magnesium alloy also has excellent heat conductivility, electromagnetic shielding simultaneously
Performance, damping capacity and machinability, and there is the series of advantages such as dimensionally stable, pollution-free, easy recovery, it is extensively application
Structural material in fields such as military project national defence, Aero-Space, medical treatment.
Low yet with magnesium alloy absolute intensity, deformation at room temperature ability is poor, oxidizable burning, the defect such as perishable, limit
Having made its extensive application as structural material, it is extensive that the application of current magnesium alloy can not show a candle to aluminium alloy.Therefore, magnesium alloy is improved
Intensity makes it have good combination property, is the focus of novel magnesium alloy exploitation, and high-strength magnesium alloy is developed expansion simultaneously
The application of magnesium alloy is significant.
Summary of the invention
The problem existed for prior art, the present invention provides the preparation method of a kind of magnesium alloy, this process cost
Low and simple and easy to do, it is thus achieved that magnesium alloy there is higher intensity so that this type of magnesium alloy has more excellent than traditional commerce magnesium alloy
Mechanical property more.
For reaching this purpose, the present invention by the following technical solutions:
A kind of magnesium alloy, contains according to weight percent content: Al:5.2-6.2%, Cr:3.1-3.7%, Co:0.9-
1.1%, Cu:2.1-2.4%, Mn:0.9-1.0%, Mo:1.05-1.1%, Ni:1.2-1.4%, W:0.5-0.7%, V:0.8-0.9%,
Zn:0.11-0.14%, Si:1.1-1.3%, Ca:1.5-1.7%, Sr:1.7-1.9% surplus is Mg.
Further, contain according to weight percent content: Al:5.2%, Cr:3.1%, Co:0.9%, Cu:2.1%, Mn:
0.9%, Mo:1.05%, Ni:1.2%, W:0.5%, V:0.8%, Zn:0.11%, Si:1.1%, Ca:1.5%, Sr:1.7% surplus is Mg.
It addition, also provide for the preparation method of a kind of described magnesium alloy, comprise the following steps:
(1) raw material prepares: carrying out raw material preparation according to weight percent content, described raw material is in the middle of pure Mg ingot, Mg-Cr
Alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo intermediate alloy, Mg-Ni intermediate alloy, Mg-W
Intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, pure Ca, Al-Sr intermediate alloy；
(2) melting: by Mg-Cr intermediate alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo
In the middle of intermediate alloy, Mg-Ni intermediate alloy, Mg-W intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, Al-Sr
Alloy loads in resistance furnace, and by resistance furnace pumping high vacuum, in stove, vacuum is 1 × 10-1Pa, leak rate ＜ 0.32Pa/min, and
Being filled with argon gas, making vacuum is 0.23MPa, is then electrified to, and after above raw material is completely melt, adds pure Mg ingot and pure Ca, then
Secondary it is heated to 785-795 DEG C, is stirred after all raw materials are completely melt, makes alloying component uniform；
(3) refining: make smelting furnace be warming up to 810～830 DEG C and refine alloy, adds RJ-5 refining while stirring
Agent, refining time is 10-15 minute, stands 18-20 minute 650～670 DEG C of insulations after having refined；
(4) casting: be cast to the liquid magnesium alloy refined preheat in the swage tool that temperature is 810～830 DEG C, casting temperature
Degree is 910～930 DEG C；Cast gauge is Ф 20mm～Ф 30mm, a length of 2300mm；
(5) cold working: after using kicker annealing, the mode of room temperature drawing is processed, and annealing temperature is 750 DEG C, annealing
Time is 1h, must not be heat-treated in the middle of each drawing passes, passage accumulation cold deformation >=70%；
(6) annealing is heat-treated: semi-finished product carrying out annealing and is heat-treated, annealing temperature is 430～440 DEG C, is annealed into the time
1.5h。
Detailed description of the invention
Embodiment 1
A kind of magnesium alloy, contains according to weight percent content: Al:5.2%, Cr:3.1%, Co:0.9%, Cu:2.1%, Mn:
0.9%, Mo:1.05%, Ni:1.2%, W:0.5%, V:0.8%, Zn:0.11%, Si:1.1%, Ca:1.5%, Sr:1.7% surplus is Mg.
The preparation method of magnesium alloy, comprises the following steps:
(1) raw material prepares: carrying out raw material preparation according to weight percent content, described raw material is in the middle of pure Mg ingot, Mg-Cr
Alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo intermediate alloy, Mg-Ni intermediate alloy, Mg-W
Intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, pure Ca, Al-Sr intermediate alloy；
(2) melting: by Mg-Cr intermediate alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo
In the middle of intermediate alloy, Mg-Ni intermediate alloy, Mg-W intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, Al-Sr
Alloy loads in resistance furnace, and by resistance furnace pumping high vacuum, in stove, vacuum is 1 × 10-1Pa, leak rate ＜ 0.32Pa/min, and
Being filled with argon gas, making vacuum is 0.23MPa, is then electrified to, and after above raw material is completely melt, adds pure Mg ingot and pure Ca, then
Secondary it is heated to 785 DEG C, is stirred after all raw materials are completely melt, makes alloying component uniform；
(3) refining: make smelting furnace be warming up to 810 DEG C and refine alloy, adds RJ-5 refining agent, refining while stirring
Time is 10 minutes, stands 18 minutes 650 DEG C of insulations after having refined；
(4) casting: being cast to the liquid magnesium alloy refined preheat in the swage tool that temperature is 810 DEG C, cast temperature is
910℃；Cast gauge is Ф 20mm, a length of 2300mm；
(5) cold working: after using kicker annealing, the mode of room temperature drawing is processed, and annealing temperature is 750 DEG C, annealing
Time is 1h, must not be heat-treated in the middle of each drawing passes, passage accumulation cold deformation >=70%；
(6) annealing is heat-treated: semi-finished product carrying out annealing and is heat-treated, annealing temperature is 430 DEG C, is annealed into time 1.5h.
Embodiment 2:
A kind of magnesium alloy, contains according to weight percent content: Al:5.7%, Cr:3.4%, Co:1.0%, Cu:2.3%, Mn:
0.95%, Mo:1.07%, Ni:1.3%, W:0.6%, V:0.85%, Zn:0.13%, Si:1.2%, Ca:1.6%, Sr:1.8% surplus is
Mg。
The preparation method of described magnesium alloy, comprises the following steps:
(1) raw material prepares: carrying out raw material preparation according to weight percent content, described raw material is in the middle of pure Mg ingot, Mg-Cr
Alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo intermediate alloy, Mg-Ni intermediate alloy, Mg-W
Intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, pure Ca, Al-Sr intermediate alloy；
(2) melting: by Mg-Cr intermediate alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo
In the middle of intermediate alloy, Mg-Ni intermediate alloy, Mg-W intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, Al-Sr
Alloy loads in resistance furnace, and by resistance furnace pumping high vacuum, in stove, vacuum is 1 × 10-1Pa, leak rate ＜ 0.32Pa/min, and
Being filled with argon gas, making vacuum is 0.23MPa, is then electrified to, and after above raw material is completely melt, adds pure Mg ingot and pure Ca, then
Secondary it is heated to 790 DEG C, is stirred after all raw materials are completely melt, makes alloying component uniform；
(3) refining: make smelting furnace be warming up to 820 DEG C and refine alloy, adds RJ-5 refining agent, refining while stirring
Time is 13 minutes, stands 19 minutes 660 DEG C of insulations after having refined；
(4) casting: being cast to the liquid magnesium alloy refined preheat in the swage tool that temperature is 820 DEG C, cast temperature is
920℃；Cast gauge is Ф 25, a length of 2300mm；
(5) cold working: after using kicker annealing, the mode of room temperature drawing is processed, and annealing temperature is 750 DEG C, annealing
Time is 1h, must not be heat-treated in the middle of each drawing passes, passage accumulation cold deformation >=70%；
(6) annealing is heat-treated: semi-finished product carrying out annealing and is heat-treated, annealing temperature is 435 DEG C, is annealed into time 1.5h.
Embodiment 3:
A kind of magnesium alloy, contains according to weight percent content: Al:6.2%, Cr:3.7%, Co:1.1%, Cu:2.4%, Mn:
1.0%, Mo:1.1%, Ni:1.4%, W:0.7%, V:0.9%, Zn:0.14%, Si:1.3%, Ca:1.7%, Sr:1.9% surplus is Mg.
The preparation method of described magnesium alloy, comprises the following steps:
(1) raw material prepares: carrying out raw material preparation according to weight percent content, described raw material is in the middle of pure Mg ingot, Mg-Cr
Alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo intermediate alloy, Mg-Ni intermediate alloy, Mg-W
Intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, pure Ca, Al-Sr intermediate alloy；
(2) melting: by Mg-Cr intermediate alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo
In the middle of intermediate alloy, Mg-Ni intermediate alloy, Mg-W intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, Al-Sr
Alloy loads in resistance furnace, and by resistance furnace pumping high vacuum, in stove, vacuum is 1 × 10-1Pa, leak rate ＜ 0.32Pa/min, and
Being filled with argon gas, making vacuum is 0.23MPa, is then electrified to, and after above raw material is completely melt, adds pure Mg ingot and pure Ca, then
Secondary it is heated to 795 DEG C, is stirred after all raw materials are completely melt, makes alloying component uniform；
(3) refining: make smelting furnace be warming up to 830 DEG C and refine alloy, adds RJ-5 refining agent, refining while stirring
Time is 15 minutes, stands 20 minutes 670 DEG C of insulations after having refined；
(4) casting: being cast to the liquid magnesium alloy refined preheat in the swage tool that temperature is 830 DEG C, cast temperature is
930℃；Cast gauge is Ф 30mm, a length of 2300mm；
(5) cold working: after using kicker annealing, the mode of room temperature drawing is processed, and annealing temperature is 750 DEG C, annealing
Time is 1h, must not be heat-treated in the middle of each drawing passes, passage accumulation cold deformation >=70%；
(6) annealing is heat-treated: semi-finished product carrying out annealing and is heat-treated, annealing temperature is 440 DEG C, is annealed into time 1.5h.
The performance of the alloy that embodiment 1-3 obtains is listed in the table below
Claims (3)
1. a magnesium alloy, it is characterised in that contain according to weight percent content: Al:5.2-6.2%, Cr:3.1-3.7%,
Co:0.9-1.1%, Cu:2.1-2.4%, Mn:0.9-1.0%, Mo:1.05-1.1%, Ni:1.2-1.4%, W:0.5-0.7%, V:
0.8-0.9%, Zn:0.11-0.14%, Si:1.1-1.3%, Ca:1.5-1.7%, Sr:1.7-1.9%, surplus is Mg.
2. magnesium alloy as claimed in claim 1, it is characterised in that contain according to weight percent content: Al:5.2%, Cr:
3.1%, Co:0.9%, Cu:2.1%, Mn:0.9%, Mo:1.05%, Ni:1.2%, W:0.5%, V:0.8%, Zn:0.11%, Si:1.1%,
Ca:1.5%, Sr:1.7%, surplus is Mg.
3. the preparation method of magnesium alloy as claimed in claim 1 or 2, it is characterised in that:
(1) raw material prepares: carry out raw material preparation according to weight percent content, and described raw material is to close in the middle of pure Mg ingot, Mg-Cr
In Al ingot golden, pure, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo intermediate alloy, Mg-Ni intermediate alloy, Mg-W
Between alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, pure Ca, Al-Sr intermediate alloy；
(2) melting: in the middle of Mg-Cr intermediate alloy, pure Al ingot, pure Cu, Al-Co intermediate alloy, Al-Mn intermediate alloy, Al-Mo
Alloy, Mg-Ni intermediate alloy, Mg-W intermediate alloy, pure Zn, Al-V intermediate alloy, Al-Si intermediate alloy, Al-Sr intermediate alloy
Loading in resistance furnace, by resistance furnace pumping high vacuum, in stove, vacuum is 1 × 10-1Pa, leak rate ＜ 0.32Pa/min, and be filled with
Argon gas, making vacuum is 0.23MPa, is then electrified to, and after above raw material is completely melt, adds pure Mg ingot and pure Ca, again adds
Heat, to 785-795 DEG C, is stirred after all raw materials are completely melt, makes alloying component uniform；
(3) refining: make smelting furnace be warming up to 810～830 DEG C and refine alloy, adds RJ-5 refining agent, essence while stirring
The refining time is 10-15 minute, stands 18-20 minute 650～670 DEG C of insulations after having refined；
(4) casting: being cast to the liquid magnesium alloy refined preheat in the swage tool that temperature is 810～830 DEG C, cast temperature is
910～930 DEG C；Cast gauge is Ф 20mm～Ф 30mm, a length of 2300mm；
(5) cold working: after using kicker annealing, the mode of room temperature drawing is processed, and annealing temperature is 750 DEG C, annealing time
For 1h, must not be heat-treated in the middle of each drawing passes, passage accumulation cold deformation >=70%；
(6) annealing is heat-treated: semi-finished product carrying out annealing and is heat-treated, annealing temperature is 430～440 DEG C, is annealed into time 1.5h.
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| CN201410463164.8A CN104178673B (en) | 2014-09-12 | 2014-09-12 | A kind of magnesium alloy and preparation method thereof |
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| CN201410463164.8A CN104178673B (en) | 2014-09-12 | 2014-09-12 | A kind of magnesium alloy and preparation method thereof |
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| CN104178673B true CN104178673B (en) | 2016-08-24 |
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| CN104831136B (en) * | 2015-04-15 | 2016-10-26 | 苏州维泰生物技术有限公司 | A kind of medical magnesium base alloy material and preparation method thereof |
| CN108203782B (en) * | 2016-12-19 | 2020-08-28 | 有研工程技术研究院有限公司 | Magnesium alloy with electromagnetic shielding function and preparation method thereof |
| CN108220727B (en) * | 2016-12-21 | 2021-01-15 | 湖南工程学院 | Heat-resistant magnesium alloy and preparation method thereof |
| CN106811643A (en) * | 2017-01-22 | 2017-06-09 | 安徽臣诺机器人科技有限公司 | A kind of handling machinery arm machine pawl and preparation method thereof |
| CN108374102A (en) * | 2017-03-17 | 2018-08-07 | 黄河科技学院 | Component and preparation method thereof for making closed-cell foam composite material of magnesium alloy |
| CN106929723B (en) * | 2017-04-10 | 2018-11-02 | 广西科技大学 | A kind of high damping properties magnesium base alloy mechanical material and preparation method thereof |
| PL235559B1 (en) * | 2017-10-31 | 2020-09-07 | Politechnika Lodzka | Method for production of magnesium alloys with the alloy additions that have melting temperature above 650 C and density above 1.737 g/cm3 |
| CN110193525B (en) * | 2019-06-06 | 2020-08-18 | 哈尔滨理工大学 | Method for rapidly preparing magnesium alloy fine-grain wire and superfine magnesium alloy wire based on drawing process |
| CN112899540A (en) * | 2021-01-14 | 2021-06-04 | 江苏大学 | Soluble magnesium alloy for oil exploitation and preparation method thereof |
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| GB596102A (en) * | 1945-07-19 | 1947-12-29 | Rupert Martin Bradbury | A new magnesium base alloy |
| JP3622989B2 (en) * | 1993-03-30 | 2005-02-23 | 三井金属鉱業株式会社 | Molded member made of magnesium alloy and manufacturing method thereof |
| JP2007070685A (en) * | 2005-09-06 | 2007-03-22 | Daido Steel Co Ltd | Highly workable magnesium alloy, and method for producing the same |
| JP5894079B2 (en) * | 2009-12-07 | 2016-03-23 | ユー アンド アイ コーポレーション | Magnesium alloy |
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