CN101058861A - Casting heat-resistant magnesium alloy - Google Patents
Casting heat-resistant magnesium alloy Download PDFInfo
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- CN101058861A CN101058861A CN 200710099819 CN200710099819A CN101058861A CN 101058861 A CN101058861 A CN 101058861A CN 200710099819 CN200710099819 CN 200710099819 CN 200710099819 A CN200710099819 A CN 200710099819A CN 101058861 A CN101058861 A CN 101058861A
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- alloy
- magnesium alloy
- magnesium
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 28
- 238000005266 casting Methods 0.000 title claims abstract description 13
- 239000011777 magnesium Substances 0.000 claims abstract description 15
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011572 manganese Substances 0.000 claims abstract description 11
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 9
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052706 scandium Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 abstract description 25
- 229910045601 alloy Inorganic materials 0.000 abstract description 23
- 239000007769 metal material Substances 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract 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 abstract 1
- 238000005728 strengthening Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910017642 MgSc Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- DFIYZNMDLLCTMX-UHFFFAOYSA-N gadolinium magnesium Chemical compound [Mg].[Gd] DFIYZNMDLLCTMX-UHFFFAOYSA-N 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000414 obstructive effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910000753 refractory alloy Inorganic materials 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Continuous Casting (AREA)
Abstract
The invention discloses a casting heat-proof magnesium alloy material in the light metal material domain, which comprises the following parts: 5%-10% gadolinium, 0. 5%-1. 0% manganese, 0. 3%-0. 8% scandium and residual magnesium, wherein Gd is main alloy element, which can form stable Mg-Gd compound under high temperature; Mn and Sc can form Mn2Sc in the heat disposing course; the property of alloy possesses dynamic property under normal temperature, which reduces the strength of the alloy slowly under 200-300 deg. c to satisfy aviation and automobile industry.
Description
Technical field
A kind of casting heat-resistant magnesium alloy relates to a kind of light metal material, especially a kind of casting heat-resistant magnesium alloy material.
Technical background
Magnesium alloy is as the lightest structural metallic material, and its specific tenacity is apparently higher than aluminium alloy and steel, though specific rigidity is suitable for steel with aluminium alloy engineering plastics.Automobile, track traffic, aircraft industry etc. have become the maximum field that magnesium alloy is used at present, but general magnesium alloy is when temperature surpasses 120 ℃, its hot strength and creep strength can decline to a great extent, this has limited the application of magnesium alloy on traffic such as motor car engine, drive disk assembly (as gear box casing, cylinder body, cylinder head, import/exhaust pipe) and aircraft engine casing and aerospace field, countries in the world scientific research institution has carried out number of research projects for this reason, the research and development heat resistance magnesium alloy.
The magnesium alloy of Kai Fa superior heat resistance is a Mg-Th series the earliest, the high temperature creep property of this series magnesium alloy is good, and the use temperature of forging and foundry goods can reach 350 ℃, once is used in a large number on guided missile and the aircraft, but because Th has radioactivity, so now without this series magnesium alloy.Developed AE system (as AE42:Mg-4Al-2.5RE) subsequently, WE is (as WE43:Mg-4Y-2.25Nd-1Zr), EZ is rare earth refractory alloy such as (as EZ33Mg-3RE-2.5Zn-0.6Zr), these rare earth elements reduce magnesium alloy crystal boundary diffusion permeability, the cohesion of phase boundary slows down, and the second phase thermostability that forms is higher, in whole high-temperature duration obstructive action has been played in dislocation motion.The characteristics of such alloy are that content of rare earth is higher, and better heat-resisting is arranged, and the life-time service temperature is more than 120 ℃, but the difficult control of casting process, goods stability is low, and plasticity is relatively poor, is difficult to machining deformation.Also has AS system in addition (as AS41; Mg-4Al-1Si), it is low to have a cost, the plasticity height, and resistance toheat is better than the advantage of general magnesium alloy such as AZ91, but because aluminium content is low, castability is poor, in addition its strengthening phase Mg
2Si can form thick " Chinese character shape " under the slower condition of setting rate, make tensile strength of alloys and yield strength all lower.In recent years, the scientific research personnel of Japan, the U.S. has researched and developed the magnesium alloy that partly contains Ca, ZAC8506 (Mg-8Zn-5Al-0.6Ca) as the U.S., the Mg-2Zn-0.8Ca-2Mn-0.5Zr of Japan etc., it is said that creep-resistant property meets or exceeds magnesium-rare earths such as AE42, but along with the interpolation of Ca element, the alloy grain alligatoring, the hot crackability tendency increases.The research and development of heat resistance magnesium alloy at present remain an emphasis of magnesium applied research.
Summary of the invention
The object of the present invention is to provide and a kind ofly under room temperature and hot conditions, all have excellent mechanical performances, can satisfy automobile and the aerospace field casting heat-resistant magnesium alloy novel the demand of magnesium alloy.
The present invention by the following technical solutions.
A kind of casting heat-resistant magnesium alloy is characterized in that its mass percent consists of: gadolinium 5%～10%; Manganese: 0.5%～1.0%; Scandium: 0.3%～0.8%; Surplus is magnesium and unavoidable impurities
Because the interatomic bond power between Mg and the Gd is big, the solid solubility of Gd in Mg can reach 23.5wt.%, 15% of the nearly solid solution upper limit of atomic radius differential of Gd and Mg, the solution strengthening of alloy and ageing strengthening effect are obvious, fusing point height, the Heat stability is good of the Mg5Gd phase that timeliness is separated out; Gd content is at the intensity height of the Mg-Gd binary alloy more than 20%, but unit elongation is extremely low, because the low diffustivity of Sc in alloy, and its atomic radius approaches magnesium, it is a kind of ideal alloying element, but the MgSc that alloy slowly generates in ag(e)ing process precipitation, the effect that should improve mechanical property relatively is very faint, because its interface incoherence, so Mn is as the 3rd addition element, Sc and Mn can generate stable intermetallics, and the Mn2Sc of generation is a coherence, can play strengthening effect to alloy, improve the creep resistance of magnesium alloy, hardness and intensity.
Alloy of the present invention the preparation method be: with after the magnesium ingot fusing, be warmed up to 800-830 ℃, under flux protection, add master alloy Mg-Gd, Mg-Sc master alloy and MnCl
2, after waiting to melt, stir and left standstill 10-20 minute, cool to 700-720 ℃ and cast.
The heat resistance magnesium alloy that the present invention proposes with gadolinium as main alloy element, can generate magnesium-gadolinium strengthening phase with magnesium, this phase high-temperature stability is good, and gadolinium can add with the form of metal gadolinium or master alloy, alloying element Mn also can add with the form of master alloy or chemical reagent, and is easy to operate, though Sc costs an arm and a leg, can play strengthening effect but add-on surpasses 0.3%, add the segregation of the smelting temperature and the Sc that can reduce alloy effectively with the form of master alloy.The Mn2Sc of Sc and Mn generation coherence is reinforced alloys effectively.
The heat resistance magnesium alloy that the present invention proposes has the good mechanical performance at ambient temperature, and under 200-300 ℃ condition, the strength degradation of alloy is slow, has good temperature resistance.
Embodiment
A kind of casting heat-resistant magnesium alloy, its mass percent consists of: gadolinium 5%～10%; Manganese: 0.5%～1.0%; Scandium: 0.3%～0.8%; Surplus is magnesium and unavoidable impurities
Below by specific examples technical scheme of the present invention is described further.
Embodiment 1
The component of heat resistance magnesium alloy and weight percent: Gd:5%; Mn:1.0%; Sc:0.5%; Surplus is a unavoidable impurities in magnesium and the castingprocesses.Alloy was incubated solid solution in 6 hours through 500 ℃, and then at 250 ℃, after 12 hours insulation timeliness, its mechanical property is as follows:
Under 25 ℃ of conditions, tensile strength: 148.65Mpa, yield strength: 101.12Mpa, unit elongation: 6.44%
Under 200 ℃ of conditions, tensile strength: 155.18Mpa, yield strength: 110.05Mpa, unit elongation: 12.43%
Under 250 ℃ of conditions, tensile strength: 150.24Mpa, yield strength: 108.2Mpa, unit elongation: 12.95%
Under 300 ℃ of conditions, tensile strength: 136.28Mpa, yield strength: 96.95Mpa, unit elongation: 13.68%
Embodiment 2
The component of heat resistance magnesium alloy and weight percent: Gd:10%; Mn:1%; Sc:0.3%; Surplus is a unavoidable impurities in magnesium and the castingprocesses.Alloy was incubated solid solution in 6 hours through 500 ℃, and then at 250 ℃, after 16 hours insulation timeliness, its mechanical property is as follows:
Under 25 ℃ of conditions, tensile strength: 210.78Mpa, yield strength: 170.82Mpa, unit elongation: 4.28%
Under 200 ℃ of conditions, tensile strength: 228.08Mpa, yield strength: 185.35Mpa, unit elongation: 5.20%
Under 250 ℃ of conditions, tensile strength: 211.34Mpa, yield strength: 165.32Mpa, unit elongation: 6.31%
Under 300 ℃ of conditions, tensile strength: 186.23Mpa, yield strength: 142.77Mpa, unit elongation: 6.91%
Embodiment 3
The component of heat resistance magnesium alloy and weight percent: Gd:7%; Mn:1.0%; Sc:0.8%; Surplus is a unavoidable impurities in magnesium and the castingprocesses.Alloy was incubated solid solution in 6 hours through 500 ℃, and then at 250 ℃, after 14 hours insulation timeliness, its mechanical property is as follows:
Under 25 ℃ of conditions, tensile strength: 180.65Mpa, yield strength: 150.82Mpa, unit elongation: 5.28%
Under 200 ℃ of conditions, tensile strength: 191.08Mpa, yield strength: 156.35Mpa, unit elongation: 6.18%
Under 250 ℃ of conditions, tensile strength: 186.34Mpa, yield strength: 147.32Mpa, unit elongation: 6.81%
Under 300 ℃ of conditions, tensile strength: 161.23Mpa, yield strength: 122.77Mpa, unit elongation: 7.11%
Claims (1)
1. a casting heat-resistant magnesium alloy is characterized in that its mass percent consists of: gadolinium 5%～10%; Manganese: 0.5%～1.0%; Scandium: 0.3%～0.8%; Surplus is magnesium and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710099819 CN101058861A (en) | 2007-05-31 | 2007-05-31 | Casting heat-resistant magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710099819 CN101058861A (en) | 2007-05-31 | 2007-05-31 | Casting heat-resistant magnesium alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101058861A true CN101058861A (en) | 2007-10-24 |
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ID=38865165
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710099819 Pending CN101058861A (en) | 2007-05-31 | 2007-05-31 | Casting heat-resistant magnesium alloy |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985712A (en) * | 2010-12-08 | 2011-03-16 | 重庆理工大学 | Method for thinning Mg-RE-Mn-Sc series magnesium alloy crystalline grains by adding Zr |
| CN105229187A (en) * | 2013-04-10 | 2016-01-06 | 乌尔里希·伯夫克 | Without the magnesium alloy of aluminium |
| JP2016079446A (en) * | 2014-10-15 | 2016-05-16 | 株式会社Ihi | Magnesium alloy cast article and manufacturing method therefor |
| CN106834852A (en) * | 2017-02-15 | 2017-06-13 | 苏州慧金新材料科技有限公司 | A kind of high strength anti-corrosion magnesium alloy |
-
2007
- 2007-05-31 CN CN 200710099819 patent/CN101058861A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985712A (en) * | 2010-12-08 | 2011-03-16 | 重庆理工大学 | Method for thinning Mg-RE-Mn-Sc series magnesium alloy crystalline grains by adding Zr |
| CN101985712B (en) * | 2010-12-08 | 2012-06-27 | 重庆理工大学 | Method for thinning Mg-RE-Mn-Sc series magnesium alloy crystalline grains by adding Zr |
| CN105229187A (en) * | 2013-04-10 | 2016-01-06 | 乌尔里希·伯夫克 | Without the magnesium alloy of aluminium |
| JP2016079446A (en) * | 2014-10-15 | 2016-05-16 | 株式会社Ihi | Magnesium alloy cast article and manufacturing method therefor |
| CN106834852A (en) * | 2017-02-15 | 2017-06-13 | 苏州慧金新材料科技有限公司 | A kind of high strength anti-corrosion magnesium alloy |
| CN106834852B (en) * | 2017-02-15 | 2018-09-14 | 苏州慧金新材料科技有限公司 | A kind of high strength anti-corrosion magnesium alloy |
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