CN102888546A - High-precision magnesium alloy sheet and preparation method thereof - Google Patents
High-precision magnesium alloy sheet and preparation method thereof Download PDFInfo
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- CN102888546A CN102888546A CN2012103919146A CN201210391914A CN102888546A CN 102888546 A CN102888546 A CN 102888546A CN 2012103919146 A CN2012103919146 A CN 2012103919146A CN 201210391914 A CN201210391914 A CN 201210391914A CN 102888546 A CN102888546 A CN 102888546A
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Abstract
The invention discloses a high-precision magnesium alloy sheet which is prepared from the following raw materials: 0.2% of yttrium, 0.06% of titanium, 0.05% of cerium, 0.05% of lanthanum, 0.02% of samarium, 0.5% of zinc, 2% of manganese and the balance of magnesium. The invention also discloses a preparation method of the magnesium alloy sheet. The magnesium alloy sheet disclosed by the invention has the advantages of favorable corrosion resistance and greatly higher physicochemical parameters (fracture strength, elongation percentage and the like), has high market application value, and can be used in the fields of automobile transmission cases, motor casings and the like.
Description
Technical field
The present invention relates to a kind of high precision magnesium alloy plate and preparation method thereof, belong to the magnesium alloy materials technical field.
Background technology
Magnesium alloy is to add other elementary composition alloys take magnesium as base, and be characterized in: density is little, and specific tenacity is high, and Young's modulus is large, good heat dissipation, and shock absorbing is good, and the loading capacity that withstands shocks is larger than aluminium alloy, and the corrosive nature of anti-organism and alkali is good.Because magnesium alloy materials has specific tenacity, specific rigidity is high and the characteristics such as damping shock absorption, become the important raw and processed materials of automobile industry, provide larger development space for satisfying energy-conservation and requirement environmental protection of automotive industry.It is most widely used in the cast magnesium alloys that Mg-Al is associated gold, and wherein AZ system and AM are that Mg-Al is associated gold has obtained widely commercial applications in automotive industry, and these alloys not only have good castibility and also show good normal temperature mechanical property.But since they hot strength and creep-resistant property is not good, corrosion resistance nature is relatively poor, can't be used for the demanding automobile dynamic system parts of high temperature creep property, all be as some nonessential automobile component all the time, such as bearing circle, the steering post parts, dashboard, seat and wheel casing etc., their application in the major impetus systems such as automobile gearbox and motor body are limited by very large.
The shortcomings such as it is high that the heat resistance magnesium alloy Mg-Al-Ca (AX) of the interpolation alkaline earth element of exploitation is at present, Mg-Al-Sr (AJ) alloy etc. exists hot tearing susceptibility, and alloy plasticity is relatively poor.Add rare earth element and can significantly improve the magnesium alloy resistance toheat, carried out a large amount of exploitations and research work both at home and abroad.The rare earth element that How to choose is suitable and adding proportion belong to prior art technical problem anxious to be resolved to reach best industrial application value.
Summary of the invention
Technical problem to be solved by this invention provides a kind of high precision magnesium alloy plate and preparation method thereof, and this magnesium alloy has excellent hot strength, plasticity, creep-resistant property and erosion resistance.
In order to solve above-mentioned technical problem, technical scheme of the present invention is: a kind of high precision magnesium alloy plate, and it is prepared from by following raw material, (weight percent): 0.2% yttrium, 0.06% titanium, 0.05% cerium, 0.05% lanthanum, 0.02% samarium, 0.5% zinc, 2% manganese, all the other are magnesium.
The invention also discloses a kind of preparation method of high precision magnesium alloy plate, it carries out in accordance with the following steps:
1) raw material forms: (weight percent): 0.2% yttrium, and 0.06% titanium, 0.05% cerium, 0.05% lanthanum, 0.02% samarium, 0.5% zinc, 2% manganese, all the other are magnesium;
2) raw material is processed: get the magnesium metal according to above-mentioned weight proportion, under the argon gas protection, with being warming up to 750 ℃ behind the magnesium melting of metal, obtain the Mg melt; Get other raw metal according to above-mentioned weight proportion, mixing and ball milling obtained the mixed powder of raw metal after 3 hours in the high-energy ball milling tank;
3) mixed powder that melting: the starting resistance smelting furnace, with step 2) obtains is put into and is preheating to 350 ℃ crucible, treats that temperature rises to 700 ℃ and passes into SF
6And N
2Hybrid protection gas, mixed gas volume ratio are SF
6And N
2=1:200; After furnace charge to be added melts fully, add step 2) the Mg melt that obtains, and continue logical SF
6And N
2Stirred 15 minutes when hybrid protection gas, temperature rise to 750 ℃, then logical argon gas refining is 10 minutes, mixes;
4) cooling: after leaving standstill 15min, treat that melt temperature is cooled to 700 ℃, pour in the cylindrical forming mould of forcing cooling, rapid solidification forms base substrate;
5) pressurization processing: the base substrate that step 4) obtains being processed 8 hours 500 ℃ of homogenizing, adopted the forward extrusion mode, is 20:1 in extrusion ratio, extrusion temperature is 400 ℃, extrusion speed is under the condition of 1.5m/min, and base substrate is extruded, and obtains magnesium alloy plate through after the water-cooled.
The positively effect that technical solution of the present invention is brought:
1. the impurity when the cerium lanthanum can be removed melting in the magnesium alloy fused mass reaches refinery by de-gassing, purifies the effect of melt.The effect of manganese and titanium mainly is to carry heavy alloyed corrosion resistance nature and improve alloy strength, manganese can form compound with iron in the magnesium alloy or other heavy metal elements, it is excluded as slag, thereby elimination iron or other heavy metal elements are to the harmful effect of corrosion stability of magnesium alloy.The alloying elements such as yttrium samarium join in the magnesium alloy can the refinement alloy the microstructure mechanical property of improving alloy carry heavy alloyed plastic deformation ability, effective refinement matrix
Improve pattern and the distribution of phase and carry heavy alloyed comprehensive mechanical property.
2. Magnesium Alloy Sheet Parts of the present invention is indoor placement 3 years, and its surface can variable color, more without corrosion; And the Magnesium Alloy Sheet Parts processed of the AZ31 under the same terms has turned black on 1 year surface of indoor placement, and begins corrosion.Obviously, compare with traditional AZ31 magnesium alloy, the corrosion resistance nature of magnesium alloy of the present invention has had qualitative leap.
3. the technique that adopts the contriver to study for many years is prepared magnesium alloy plate, wherein with a large amount of MAGNESIUM METAL and other a small amount of metal separate treatment techniques, the performance perameter of the magnesium alloy plate of raising.
The present invention is further detailed explanation below in conjunction with embodiment, but it should not be construed the restriction to core initiative spirit of the present invention.
Embodiment
Embodiment 1
A kind of high precision magnesium alloy plate, it is prepared as follows and forms:
1) raw material forms: (weight percent): 0.2% yttrium, and 0.06% titanium, 0.05% cerium, 0.05% lanthanum, 0.02% samarium, 0.5% zinc, 2% manganese, all the other are magnesium;
2) raw material is processed: get the magnesium metal according to above-mentioned weight proportion, under the argon gas protection, with being warming up to 750 ℃ behind the magnesium melting of metal, obtain the Mg melt; Get other raw metal according to above-mentioned weight proportion, mixing and ball milling obtained the mixed powder of raw metal after 3 hours in the high-energy ball milling tank;
3) mixed powder that melting: the starting resistance smelting furnace, with step 2) obtains is put into and is preheating to 350 ℃ crucible, treats that temperature rises to 700 ℃ and passes into SF
6And N
2Hybrid protection gas, mixed gas volume ratio are SF
6And N
2=1:200; After furnace charge to be added melts fully, add step 2) the Mg melt that obtains, and continue logical SF
6And N
2Stirred 15 minutes when hybrid protection gas, temperature rise to 750 ℃, then logical argon gas refining is 10 minutes, mixes;
4) cooling: after leaving standstill 15min, treat that melt temperature is cooled to 700 ℃, pour in the cylindrical forming mould of forcing cooling, rapid solidification forms base substrate;
5) pressurization processing: the base substrate that step 4) obtains being processed 8 hours 500 ℃ of homogenizing, adopted the forward extrusion mode, is 20:1 in extrusion ratio, extrusion temperature is 400 ℃, extrusion speed is under the condition of 1.5m/min, and base substrate is extruded, and obtains magnesium alloy plate through after the water-cooled.
Embodiment 2
Remove yttrium metal and titanium metal in the raw material, other raw materials and preparation technology are constant.
Embodiment 3
Remove cerium metal and lanthanum in the raw material, other raw materials and preparation technology are constant.
Embodiment 4
Add 1% aluminium element, other raw materials and preparation technology are constant.
Embodiment 5
The magnesium alloy plate room-temperature mechanical property of the embodiment of the invention 1 preparation and the comparison of AE44
Table 1
| Alloy | Breaking tenacity (MPa) | Yield strength (MPa) | Unit elongation (%) |
| Embodiment 1 | 264 | 153 | 16 |
| Embodiment 2 | 242 | 143 | 14 |
| Embodiment 3 | 251 | 139 | 13 |
| AE44 | 225 | 141 | 5 |
The present invention utilizes rare earth element to be tending towards the characteristic crystal grain thinning of crystal boundary enrichment, improves the as cast condition mechanical property, is in order to overcome fast the grow up problem of spherical non-dendritic structure in semi-solid state insulation pulping process on the other hand.Compared with prior art, alloy of the present invention does not more add the obvious refinement of alloy microtexture of yttrium metal and titanium metal, and grain-size is fallen sharply by 160um and is 50um, and alloy various performance perameters at room temperature all improve greatly.According to GB10124-1988 metallic substance testing laboratory uniform corrosion total immersion test method, the sample of above-described embodiment preparation is tiltedly stood up in 3.5%NaCl solution, took out afterwards the corrosion product of removing specimen surface with CrO3+AgNO3+Ba (NO3) 2+ distilled water in 4 days, and then with acetone and raw spirit cleaning, survey erosion rate (mm/a).
The alloy corrosion speed that obtains in the various embodiments described above is as shown in table 2.
Table 2
| Numbering | Erosion rate (mm/a) |
| Embodiment 1 | 0.15 |
| Embodiment 2 | 0.20 |
| Embodiment 3 | 0.19 |
| Embodiment 4 | 0.26 |
Can be found out intuitively by table 2, the present invention puies forward heavy alloyed corrosion resisting property significantly by adding the rare earth metal of suitable species and quantity.
Although, above with general explanation and embodiment detailed explanation having been done in this case, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, the modification of doing without departing from theon the basis of the spirit of the present invention or improvement all belong to the scope of protection of present invention.
Claims (4)
1. a high precision magnesium alloy plate is characterized in that, described sheet material is prepared as follows and forms:
1) raw material forms: yttrium, titanium, cerium, lanthanum, samarium, zinc, manganese and magnesium;
2) raw material is processed: get the magnesium metal, under the argon gas protection, with being warming up to 750 ℃ behind the magnesium melting of metal, obtain the Mg melt; Get other raw metal, mixing and ball milling obtained the mixed powder of raw metal after 3 hours in the high-energy ball milling tank;
3) mixed powder that melting: the starting resistance smelting furnace, with step 2) obtains is put into and is preheating to 350 ℃ crucible, treats that temperature rises to 700 ℃ and passes into SF
6And N
2Hybrid protection gas, mixed gas volume ratio are SF
6: N
2=1:200; After furnace charge to be added melts fully, add step 2) the Mg melt that obtains, and continue logical SF
6And N
2Stirred 15 minutes when hybrid protection gas, temperature rise to 750 ℃, then logical argon gas refining is 10 minutes, mixes;
4) cooling: after leaving standstill 15min, treat that melt temperature is cooled to 700 ℃, pour in the cylindrical forming mould of forcing cooling, rapid solidification forms base substrate;
5) pressurization processing: the base substrate that step 4) obtains being processed 8 hours 500 ℃ of homogenizing, adopted the forward extrusion mode, is 20:1 in extrusion ratio, extrusion temperature is 400 ℃, extrusion speed is under the condition of 1.5m/min, and base substrate is extruded, and obtains magnesium alloy plate through after the water-cooled.
2. car deceleration tank shell as claimed in claim 1 is characterized in that, described step 1) raw material consists of: (weight percent): 0.2% yttrium, and 0.06% titanium, 0.05% cerium, 0.05% lanthanum, 0.02% samarium, 0.5% zinc, 2% manganese, all the other are magnesium.
3. car deceleration tank shell as claimed in claim 2 is characterized in that, described step 2) raw material is treated to: takes by weighing the magnesium metal according to the weight proportion in the step 1), under the argon gas protection, with being warming up to 750 ℃ behind the magnesium melting of metal, obtains the Mg melt; Take by weighing other raw metal according to the weight proportion in the step 1), mixing and ball milling obtained the mixed powder of raw metal after 3 hours in the high-energy ball milling tank.
4. the preparation method of a high precision magnesium alloy plate is characterized in that, described method is carried out in accordance with the following steps:
1) raw material forms: (all being weight percentage) 0.2% yttrium, and 0.06% titanium, 0.05% cerium, 0.05% lanthanum, 0.02% samarium, 0.5% zinc, 2% manganese, all the other are magnesium;
2) raw material is processed: get the magnesium metal according to above-mentioned weight proportion, under the argon gas protection, with being warming up to 750 ℃ behind the magnesium melting of metal, obtain the Mg melt; Get other raw metal according to above-mentioned weight proportion, mixing and ball milling obtained the mixed powder of raw metal after 3 hours in the high-energy ball milling tank;
3) mixed powder that melting: the starting resistance smelting furnace, with step 2) obtains is put into and is preheating to 350 ℃ crucible, treats that temperature rises to 700 ℃ and passes into SF
6And N
2Hybrid protection gas, mixed gas volume ratio are SF
6: N
2=1:200; After furnace charge to be added melts fully, add step 2) the Mg melt that obtains, and continue logical SF
6And N
2Stirred 15 minutes when hybrid protection gas, temperature rise to 750 ℃, then logical argon gas refining is 10 minutes, mixes;
4) cooling: after leaving standstill 15min, treat that melt temperature is cooled to 700 ℃, pour in the cylindrical forming mould of forcing cooling, rapid solidification forms base substrate;
5) pressurization processing: the base substrate that step 4) obtains being processed 8 hours 500 ℃ of homogenizing, adopted the forward extrusion mode, is 20:1 in extrusion ratio, extrusion temperature is 400 ℃, extrusion speed is under the condition of 1.5m/min, and base substrate is extruded, and obtains magnesium alloy plate through after the water-cooled.
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| CN201210391914.6A CN102888546B (en) | 2012-10-16 | 2012-10-16 | High-precision magnesium alloy sheet and preparation method thereof |
| CN201310537092.2A CN103526090B (en) | 2012-10-16 | 2012-10-16 | Preparation method of high-accuracy magnesium alloy plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667838A (en) * | 2014-01-03 | 2014-03-26 | 重庆大学 | Mg-Sn-Mn system wrought magnesium alloy and preparation method thereof |
| CN104651649A (en) * | 2014-06-20 | 2015-05-27 | 周萌 | Method for improving high temperature creep resistance and corrosion resistance of AZ31 alloy |
| CN105500297A (en) * | 2015-11-26 | 2016-04-20 | 杭州科明电子有限公司 | Reverse self-locking mechanism of trigger switch |
| US11542577B2 (en) | 2018-07-18 | 2023-01-03 | Posco Holdings Inc. | Magnesium alloy sheet and manufacturing method thereof |
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| CN105568096B (en) * | 2015-11-25 | 2017-09-26 | 山东银光钰源轻金属精密成型有限公司 | A kind of magnesium alloy D.C.casting casting process |
| CN105483481B (en) * | 2015-11-25 | 2017-10-27 | 山东银光钰源轻金属精密成型有限公司 | A kind of preparation method of magnesium alloy motor-car table support arm |
| CN106282623A (en) * | 2016-11-18 | 2017-01-04 | 扶绥县科学技术情报研究所 | The preparation method of High-temperature-resrarent rarent earth magnesium alloy |
| CN113061790B (en) * | 2021-03-16 | 2022-05-06 | 西安交通大学 | Mg-Zn-Ni ternary magnesium alloy material with wide corrosion rate range |
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| US6193817B1 (en) * | 1995-02-06 | 2001-02-27 | Luxfer Group Limited | Magnesium alloys |
| KR20030044997A (en) * | 2003-05-23 | 2003-06-09 | 연우인더스트리(주) | High formability the Magnesium alloy and manufacture method of the Magnesium alloy product thereof |
| CN101688270A (en) * | 2007-06-28 | 2010-03-31 | 住友电气工业株式会社 | Magnesium alloy plate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667838A (en) * | 2014-01-03 | 2014-03-26 | 重庆大学 | Mg-Sn-Mn system wrought magnesium alloy and preparation method thereof |
| CN103667838B (en) * | 2014-01-03 | 2016-02-03 | 重庆大学 | Mg-Sn-Mn system wrought magnesium alloy and preparation method thereof |
| CN104651649A (en) * | 2014-06-20 | 2015-05-27 | 周萌 | Method for improving high temperature creep resistance and corrosion resistance of AZ31 alloy |
| CN105500297A (en) * | 2015-11-26 | 2016-04-20 | 杭州科明电子有限公司 | Reverse self-locking mechanism of trigger switch |
| US11542577B2 (en) | 2018-07-18 | 2023-01-03 | Posco Holdings Inc. | Magnesium alloy sheet and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103526090A (en) | 2014-01-22 |
| CN102888546B (en) | 2014-03-19 |
| CN103526090B (en) | 2015-07-22 |
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Denomination of invention: A high-precision magnesium alloy plate and its preparation method Effective date of registration: 20230113 Granted publication date: 20140319 Pledgee: Linshang Bank Co.,Ltd. Feixian sub branch Pledgor: SHANDONG YINGUANG YUYUAN LIGHT METAL PRECISION MOLDING Co.,Ltd. Registration number: Y2023980031285 |