CN101381831A - High plasticity magnesium alloy - Google Patents

High plasticity magnesium alloy Download PDF

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Publication number
CN101381831A
CN101381831A CNA2008101720502A CN200810172050A CN101381831A CN 101381831 A CN101381831 A CN 101381831A CN A2008101720502 A CNA2008101720502 A CN A2008101720502A CN 200810172050 A CN200810172050 A CN 200810172050A CN 101381831 A CN101381831 A CN 101381831A
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magnesium alloy
magnesium
mass ratio
alloy
total mass
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CN101381831B (en
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仝仲盛
孙金凤
吴学云
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Datong Shangmg Technology Co ltd
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Abstract

The invention discloses a high plasticity magnesium alloy, which comprises the compositions of magnesium, zinc and zirconium in set percentage by mass, and also comprises 23 to27 mass percent of lithium, 7 to 9 mass percent of manganese, and 4 to 6 mass percent of yttrium; and the mass percentages of magnesium, zinc and zirconium are 80 to 83 percent , 12 to 15 percent and 2 to 8 percent respectively. The high plasticity magnesium alloy avoids forming intermetallic compounds by adding such alloying element such as lithium, manganese and yttrium to change the crystal form of magnesium alloy, thereby improving the ductility and the processability of magnesium alloy.

Description

A kind of high plastic magnesium alloy
Technical field
The present invention relates to a kind of alloy, relate in particular to a kind of high plastic magnesium alloy.
Background technology
So-called magnesium alloy is to be that base adds other elementary composition alloys with magnesium.Be characterized in: density little (about 1.8g/cm3), the specific tenacity height, Young's modulus is big, and shock absorbing is good, and the loading capacity that withstands shocks is bigger than aluminium alloy, and the corrosive nature of anti-organism and alkali is good.Main alloy element has aluminium, zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium etc.
What use was the widest at present is magnalium, secondly is magnesium-manganese alloy and magnesium zinc zirconium alloy.Be mainly used in industrial sectors such as Aeronautics and Astronautics, transportation, chemical industry, rocket.Be divided into wrought magnesium alloys and cast magnesium alloys two classes by the moulding method.
Magnesium alloy is the lightest metal in practical metal, and the proportion of magnesium approximately is 2/3 of aluminium, is 1/4 of iron.Therefore, magnesium alloy is widely used in portable apparatus and the automobile industry, reaches light-weighted purpose.
Though the proportion of magnesium alloy is heavier than plastics,, the intensity of unit weight and spring rate be than plastics height, so under the situation of same intensity component, it is thin and light that the component of magnesium alloy can be done than plastics.In addition, because therefore the specific tenacity of magnesium alloy, under the intensity that does not reduce component, can alleviate the weight of the component of aluminium or iron also than aluminium alloy and iron height.
Though the thermal conductivity of magnesium alloy is not as good as aluminium alloy,, exceed tens of times than plastics, therefore, used for magnesium alloy can be effectively be dispersed into the outside with the heat of inside on electric equipment products.
Therefore the electromagnetic wave shielding performance of magnesium alloy, uses magnesium alloy can save the electroplating work procedure of electromagnetic shielding film than electroplate the effective of screened film on plastics.
In elastic range, when magnesium alloy is subjected to shock load, the energy of absorption than Al-alloy parts big half, so magnesium alloy has good antidetonation noise abatement performance.
The magnesium alloy fusing point is lower than aluminium alloy fusing point, and the die cast performance is good.Mg alloy castings tensile strength and aluminum alloy casting are suitable, generally can reach 250MPA, reach as high as Mpa more than 600.
Magnesium alloy is also individual excellent corrosion resisting performance, capability of electromagnetic shielding, and shielding property can be accomplished 100% recycling.
Along with market constantly widening to magnesium products demand Application Areas, widespread use from Aeronautics and Astronautics, automobile component, iron and steel desulfurization, alloy pressuring casting, 3C Product, continuous research and development to the product for civilian use, and the further research of magnesium alloy technology, the development of magnesium products more and more shows the irreplaceable advantage of its uniqueness.But the manufacturing of magnesium alloy component mainly relies on casting, fusing/solidifying process, and bad processibility has at ambient temperature but become the bottleneck place of its widespread use.
Summary of the invention
The object of the present invention is to provide a kind of high plastic magnesium alloy,, improve the ductility of magnesium alloy under normal temperature environment whereby by adding the crystal habit that other metallic elements change magnesium alloy.
High plastic magnesium alloy of the present invention comprises magnesium, zinc, the zirconium of setting mass ratio, also comprises: to account for total mass ratio and be 23~27% lithium, account for total mass ratio be 7~9% manganese, account for total mass ratio is 4~6% yttrium; And the ratio of described magnesium, zinc, zirconium is respectively 80~83%, 12~15%, 2~8%.
In the high plastic magnesium alloy of the present invention, the ratio of described magnesium, zinc, zirconium is respectively 80%, 15%, 5%.
In the high plastic magnesium alloy of the present invention, described lithium accounts for that total mass ratio is 25%, manganese accounts for that total mass ratio is 8%, to account for total mass ratio be 5% to yttrium.
High plastic magnesium alloy of the present invention by adding alloying elements such as lithium, manganese, yttrium to change the crystal habit of magnesium alloy, is avoided forming intermetallic compound, thereby is improved the ductility and the processibility of magnesium alloy.
Embodiment
Below high plastic magnesium alloy of the present invention is elaborated.
High plastic magnesium alloy of the present invention comprises magnesium, zinc, the zirconium of setting mass ratio, also comprises: to account for total mass ratio and be 23~27% lithium, account for total mass ratio be 7~9% manganese, account for total mass ratio is 4~6% yttrium; And the ratio of described magnesium, zinc, zirconium is respectively 80~83%, 12~15%, 2~8%.
Wherein, preferred version is: described lithium accounts for that total mass ratio is 25%, manganese accounts for that total mass ratio is 8%, to account for total mass ratio be 5% to yttrium.And the ratio of described magnesium, zinc, zirconium is respectively 80%, 15%, 5%.
High plastic magnesium alloy of the present invention can make according to following method:
Step 101 places crucible with magnesium, zinc, the zirconium of setting mass ratio, and wherein, the ratio of described magnesium, zinc, zirconium is respectively 80~83%, 12~15%, 2~8%; Described crucible places vacuum or is full of the smelting furnace of rare gas element.
Because magnesium and oxygen have very strong avidity, therefore when making high plastic magnesium alloy, need in vacuum melting furnace, handle magnesium alloy, or in the smelting furnace that is full of rare gas element of oxygen-free gas, handle.The vacuum tightness of smelting furnace or oxygen level can detect by outer connected control system.
The magnesium of described setting mass ratio, zinc, zirconium, specifically, the ratio of described magnesium, zinc, zirconium can be respectively 80%, 15%, 5%.
Step 102 is with material heat fused in the crucible and form even molten substrate.
In this step, can be by smelting furnace be carried out induction heating magnesium, zinc, the zirconium in the fusion crucible.When carrying out induction heating, described crucible is fixed in the interior induction heat coil of smelting furnace.
Step 103, to add in above-mentioned molten substrate that to account for total mass ratio be 23~27% lithium, account for total mass ratio be 7~9% manganese, account for total mass ratio is 4~6% yttrium, and fully stirs.
In this step, to account for total mass ratio be 25% lithium to preferred version in order to add in molten substrate, account for total mass ratio is 8% manganese, account for total mass ratio is 5% yttrium.
When adding to lithium, manganese, yttrium in the molten substrate, needing the control temperature of smelting furnace is between 650 to 680 degrees centigrade.
Step 104 molten substrate of having added above-mentioned lithium, manganese, yttrium is injected mold, and cooled and solidified forms magnesium alloy ingot.
The formed magnesium alloy ingot of this step can carry out extrusion molding at normal temperatures, and this magnesium alloy ingot has high plasticity.
For improving its performance, also can be before extruding, with ingot bar tempering 2 to 3 hours between 350 to 400 degrees centigrade, extruding when being cooled to 150 to 200 degrees centigrade again.Perhaps, with ingot bar tempering 2 to 3 hours between 350 to 400 degrees centigrade, push when being cooled to normal temperature again.
Following table has been listed the yield strength when metals such as lithium, manganese, yttrium, zinc, zirconium account for different total mass ratios in the magnesium alloy and the relativity of ductility.
Described magnesium alloy (common) is the commercially available ordinary magnesium alloy product that does not add metallic elements such as lithium, manganese, yttrium, described magnesium alloy 1~magnesium alloy 5 is the magnesium alloy ingot among the present invention who gets according to the aforesaid method manufacturing, the size of described each magnesium alloy ingot is 100mm*80mm*50mm, and, be squeezed into the thick thin plate of 0.15mm at normal temperatures 350 degrees centigrade of tempering 2 hours.The magnesium alloy ingot that should be noted that the method for the invention manufacturing can not only be squeezed into thin plate, but can be squeezed into any desired form.
Lithium (%) Yttrium (%) Manganese (%) Zinc (%) Zirconium (%) Yield strength (MPa) Ductility (%)
Magnesium alloy (common) 5 110 13
Magnesium alloy 1 23.1 4.3 7.5 7.8 5.2 145 45
Magnesium alloy 2 24.3 4.9 7.8 7.6 5.04 163 42
Magnesium alloy 3 25 5 8 7.4 4.96 175 45
Magnesium alloy 4 25.1 5.1 8.3 7.38 4.92 171 47
Magnesium alloy 5 26.8 5.6 8.8 7.06 4.7 141 49
As can be seen from the above table:
From the contrast of the yield strength of ordinary magnesium alloy, magnesium alloy 1, magnesium alloy 2, magnesium alloy 3, magnesium alloy 4, magnesium alloy 5 and ductility as can be seen, added after lithium, manganese, the yttrium, the yield strength and the ductility of magnesium alloy are significantly improved.And when interpolation accounted for total mass ratio and is 25% lithium, 5% yttrium, 8% manganese, its yield strength reached maximum, and afterwards, along with the rising that lithium, manganese, yttrium account for total mass ratio, its yield strength begins to reduce, and ductility then is to strengthen always.
The characteristic of magnesium, manganese, lithium, yittrium alloy is to have higher intensity, higher ductility and lower density, meets light, thin, short and little industrial requirements.When lithium content surpass mass percent 10% the time, can form body-centered cubic structure.By increasing lithium content, body-centered cubic structure increases, and this means the ductility that can improve alloy apace.Yet excessive additional elements will hinder alloy strength, therefore, add yttrium again and will keep alloy strength.
The reason that magnesium alloy has bad ductility is its hexagonal lattice structure and forms hard intermetallic compound.In the method for the invention, change the magnesium alloy crystal habit and avoid forming intermetallic compound by adding the specific alloy element, thereby improve ductility and processibility.The high ductibility magnesium alloy that gets according to the method for the invention manufacturing can be squeezed into 0.15 millimeter thin plate, and can carry out deep stamping at normal temperatures, thereby can be applied on automobile, 3C Product, vessel and some the office automation products.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification sheets and the embodiment, it can be applied to various suitable the field of the invention fully, for those skilled in the art, can easily realize other modification, therefore under the universal that does not deviate from claim and equivalency range and limited, the legend that the present invention is not limited to specific details and illustrates here and describe.

Claims (3)

1. a high plastic magnesium alloy comprises magnesium, zinc, the zirconium of setting mass ratio, it is characterized in that, also comprises: to account for total mass ratio and be 23~27% lithium, account for total mass ratio be 7~9% manganese, account for total mass ratio is 4~6% yttrium;
And the ratio of described magnesium, zinc, zirconium is respectively 80~83%, 12~15%, 2~8%.
2. high plastic magnesium alloy as claimed in claim 1 is characterized in that the ratio of described magnesium, zinc, zirconium is respectively 80%, 15%, 5%.
3. high plastic magnesium alloy as claimed in claim 1 or 2 is characterized in that, described lithium accounts for that total mass ratio is 25%, manganese accounts for that total mass ratio is 8%, to account for total mass ratio be 5% to yttrium.
CN2008101720502A 2008-10-29 2008-10-29 High plasticity magnesium alloy Expired - Fee Related CN101381831B (en)

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CN101381831B CN101381831B (en) 2010-06-09

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106244879A (en) * 2016-08-26 2016-12-21 余姚市婉珍五金厂 Alloy material that a kind of railroad rail is special and preparation method thereof
CN106811640A (en) * 2015-11-30 2017-06-09 中国科学院金属研究所 A kind of high-strength high-plastic magnesium lithium alloy of novel ultra-light and preparation method thereof
EP3650561A1 (en) 2018-11-08 2020-05-13 Citic Dicastal Co., Ltd. Plastic wrought magnesium alloy and preparation method thereof
EP4144875A1 (en) 2021-09-03 2023-03-08 CITIC Dicastal Co., Ltd Magnesium alloy for wheel and preparation method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1187305A (en) * 1967-05-22 1970-04-08 Dow Chemical Co Process for production of Extruded Magnesium-Lithium Alloy Articles
CN1238544C (en) * 2003-06-17 2006-01-25 沈阳工业大学 Magnesium-manganese intermediate alloy and preparing method thereof
CN1297676C (en) * 2004-11-11 2007-01-31 重庆大学 High plasticity magnesium alloy containing rare-earth yttrium
CN1281776C (en) * 2004-12-01 2006-10-25 北京航空航天大学 Aluminum magnesium containing alloy materials and method for making same
CN100432258C (en) * 2006-11-01 2008-11-12 中国科学院金属研究所 Quasi crystal phase fortified magnesium lithium alloy and its preparation method
CN101020981A (en) * 2007-03-26 2007-08-22 重庆大学 Mg-Zn-Mn alloy material with high Zn content
CN100436624C (en) * 2007-06-22 2008-11-26 西安工业大学 High-intensity thermal deformation resistant magnesium alloy

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106811640A (en) * 2015-11-30 2017-06-09 中国科学院金属研究所 A kind of high-strength high-plastic magnesium lithium alloy of novel ultra-light and preparation method thereof
CN106244879A (en) * 2016-08-26 2016-12-21 余姚市婉珍五金厂 Alloy material that a kind of railroad rail is special and preparation method thereof
EP3650561A1 (en) 2018-11-08 2020-05-13 Citic Dicastal Co., Ltd. Plastic wrought magnesium alloy and preparation method thereof
EP4144875A1 (en) 2021-09-03 2023-03-08 CITIC Dicastal Co., Ltd Magnesium alloy for wheel and preparation method thereof

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