CN102899544A - Rare earth magnesium alloy - Google Patents
Rare earth magnesium alloy Download PDFInfo
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- CN102899544A CN102899544A CN2012103950897A CN201210395089A CN102899544A CN 102899544 A CN102899544 A CN 102899544A CN 2012103950897 A CN2012103950897 A CN 2012103950897A CN 201210395089 A CN201210395089 A CN 201210395089A CN 102899544 A CN102899544 A CN 102899544A
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Abstract
The invention discloses rare earth magnesium alloy for 3C (computer, communication and consumer electronics) thin-wall/ultrathin-wall die castings. The rare earth magnesium alloy comprises the following raw materials in percent by weight: 97.7-99.8 percent of die-cast magnesium alloy waste, 0.1-1 percent of cerium, 0.1-1 percent of lanthanum and 0-0.3 percent of yttrium-enriched mixed rare earth. By using the die-cast magnesium alloy wastes as the raw materials and scientifically and reasonably adding light rare earth elements and heavy rare earth elements in the die-cast magnesium alloy wastes, the formability, the corrosion resistance, the strength and the creep resistance of magnesium alloy products are improved, and the rare earth magnesium alloy can be enabled to satisfy the requirement on the materials of thin-wall and ultrathin-wall 3C products.
Description
Technical field
The present invention relates to the metal material processing technical field, relate in particular to a kind of magnesium-rare earth.
Background technology
Magnesium alloy is to add other elementary composition alloys take magnesium as base, it is material the lightest in the Structural Engineering, have the good characteristic that proportion is little, rigidity is high, good, the anti-electromagnetic interference of vibration damping is good, thermal diffusivity is good, texture is good, be widely used in the every field such as aerospace, transportation, chemical industry, rocket.
3C Product refers to computer (Computer), communication (Communication) and consumer electronics product (ConsumerElectronics) three's combination, its main development trend is thin-walled property and ultrathin, thereby this series products requires higher to material: 1) thin-walled/ultra-thin, lightweight, intensity is high; 2) good moldability; 3) erosion resistance is high; Usually the magnesium-alloy material wall thickness is much in 0.8mm; Thin-walled property requires to be not more than 0.65mm; Ultrathin more requires to be not more than 0.45mm.Yet because intensity, creep resistance and the corrosion resistance nature of traditional magnesium alloy are relatively poor, can't adapt to the requirement of 3C Product thin-walled property and ultrathin, thereby the magnesium alloy materials of rare earth occur again containing in recent years.Facts have proved to have special chemically reactive and surface-active rare earth element, is to improve magnesium alloy cast performance, high temperature creep property and corrosion resistance nature the most effectively and the element that has practical value most.
Although magnesium-rare earth has become the study hotspot of nonferrous materials scientific domain, the magnesium-rare earth of numerous kinds emerging in large numbers like the mushrooms after rain, but since the 3C Product of thin-walled property and ultrathin to material require too high, have not yet to see the report of the magnesium alloy materials that is fit to thin-wall product, how to optimize and be fit to the 3C thin-wall product with rare earth element kind and addition, develop lightweight, intensity is high, corrosion resistant rare earth magnesium alloy material is the inevitable requirement of existing situation.
Summary of the invention
The object of the invention is to overcome the defective that existing rare earth magnesium alloy material can't satisfy thin-walled property and the material requirements of ultrathin 3C Product, provide that a kind of intensity is high, lightweight, strong resistance, corrosion-resistant and cheap magnesium-rare earth.
The present invention solves the scheme that above-mentioned technological deficiency adopts:
A kind of magnesium-rare earth, the raw material of described magnesium-rare earth and weight percent are:
Diecast magnesium alloy waste material 97.7-99.8%
Cerium 0.1-1%
Lanthanum 0.1-1%
Rich yttrium mixed rare earth 0-0.3%.
Preferably, described diecast magnesium alloy waste material is 1 grade of waste material and 2 grades of waste materials that AZ series diecast magnesium alloy produces after extrusion process.
Preferably, described 1 grade of waste material and 2 grades of waste materials, weight percent consists of: aluminium 8-11%, zinc 0.1-1%, manganese 0.04-0.1%, silicon 0.01-0.1%, iron 0.001-0.002%, copper 0.002-0.004%, nickel 0.0005-0.001%, beryllium 0.0005-0.001%, surplus is magnesium and inevitable impurity.
Preferably, the weight percent of described cerium is the 0.1-0.2% of magnesium-rare earth total amount.
Preferably, the weight percent of described lanthanum is the 0.1-0.3% of magnesium-rare earth total amount.
The present invention is by adding rare earth element in the diecast magnesium alloy waste material, remove metallic impurity and the oxide compound slag inclusions such as the nonmetallic impuritys such as the hydrogen in the magnesium alloy, oxygen, sulphur, nitrogen, chlorine and iron, cobalt, copper, nickel, improved formability and the rotproofness of alloy product; Utilize simultaneously rare earth element to cause constitutional supercooling in the enrichment of solid-liquid interface forward position, form new forming core, crystal grain becomes thin equi-axed crystal, thereby improves the intensity of alloy product; In addition rare earth and magnesium effect produces solution strengthening and ageing strengthening effect, but in heat treatment process compound, second-phase particulate between precipitating metal, be distributed in intracrystalline and strengthen matrix, segregation makes crystal boundary structure refinement, reinforcement in crystal boundary; The rare earth that surpasses solid solubility and magnesium or form compound disperse nascent, that thermal stability is high and be distributed in the alloy with other element (such as aluminium) direct effect in the magnesium alloy, the generation dispersion-strengthened action, and improve the performances such as its intensity and creep resistance.
Compare and prior art, the present invention has following beneficial effect:
(1) take the diecast magnesium alloy waste material as raw material, the compression casting waste material of both fully having recycled has reduced again the production cost of magnesium-rare earth;
(2) in the diecast magnesium alloy waste material, added the multielement rare earth element that reserves are many, partition is high, price is low, the formability, rotproofness, intensity and the creep resistance that have improved magnesium-alloy material;
(3) with weight rare earth scientific combination, give full play to light rare earths active strong, purify the high advantage of the large advantage of refining effect and heavy rare earths solution strengthening and ageing strengthening effect, produce the double optimization effect.
Description of drawings
In order to be illustrated more clearly in technical scheme of the present invention, the below will do to introduce simply to the accompanying drawing of required use in the embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the design sketch of the magnesium alloy PC cover of prior art production;
Fig. 2 is the design sketch of the magnesium-rare earth PC cover of embodiment of the invention preparation.
Embodiment
The below is clearly and completely described the technical scheme in the embodiment of the present invention.
Embodiment 1
Be used for a kind of magnesium-rare earth of 0.65mm PC cover, its raw material and weight percent are:
Diecast magnesium alloy waste material 99.656%
Cerium 0.161%
Lanthanum 0.183%
Rich yttrium mixed rare earth 0%.
Wherein, the diecast magnesium alloy waste material is 1 grade of waste material and 2 grades of waste materials that AZ series diecast magnesium alloy produces after extrusion process, its weight percent consists of: aluminium 9.82%, zinc 0.78%, manganese 0.083%, silicon 0.052%, iron 0.0019%, copper 0.0033%, nickel 0.0006%, beryllium 0.0007%, surplus are Mg and inevitable impurity.
In order to embody the beneficial effect of the embodiment of the invention, following comparative example is set also:
The comparative example 1
A kind of magnesium alloy that is used for 0.65mm PC cover, the weight percent of its raw material consists of: aluminium 9.06%, zinc 0.76%, manganese 0.151%, silicon 0.041%, iron 0.0036%, copper 0.0045%, nickel 0.0015%, beryllium 0.0007%, surplus are Mg and inevitable impurity.
Table 1 is that embodiment 1 shows (except the magnesium) with the weight percent composition of 1 two kinds of alloy materials of comparative example.
Table 1 embodiment 1 forms table with the weight percent of comparative example's 1 described 0.65mmPC cover material
| Element | Al | Mn | Zn | Si | Fe | Cu | Ni | Be | La | Ce |
| Embodiment 1 | 9.06 | 0.151 | 0.76 | 0.041 | 0.0036 | 0.0045 | 0.0015 | 0.0007 | - | - |
| The comparative example 1 | 9.82 | 0.083 | 0.78 | 0.052 | 0.0019 | 0.0033 | 0.0006 | 0.0007 | 0.183 | 0.161 |
The corrosion resistance nature test: each three on model, at ambient temperature, in the 5%NaCl solution, 24 hours salt-fog test (24.6 ℃ of test temperatures have been carried out, relative humidity 45%), test the size of the total area and the corroded area of its model, get three sample means and evaluate corrosion-resistant grade.
Measuring mechanical property: get 5 on metallic cover bi-material model, cut tension specimen in same area, under the same conditions, carry out Elongation test, average; In like manner, get 5 bi-material metallic cover models, on pressure testing machine, carry out bending resistance test.
The test result of the present embodiment sees Table 2, table 3.
Table 2 embodiment 1 and the corrosion resistance nature evaluation form of comparative example 1 for 0.65mmPC cover material
Table 3 embodiment 1 and the mechanical performance parameter table of comparative example 1 for 0.65mmPC cover material
| The sample title | Tensile strength/MPa | Yield strength/MPa | Unit elongation/% | Flexural strength/Kgf |
| The comparative example 1 | 174.1 | 124.5 | 1.07 | 23 |
| Embodiment 1 | 185 | 131 | 1.30 | 26 |
As can be seen from the table, embodiment 1 described magnesium-rare earth model corrosion resistance nature is better, reaches 9 grades, improves 1 grade than comparative example 1.And after adding the multiple trace rare earths element, can effectively promote the mechanical property of magnesium alloy.
In addition, the present invention also utilizes embodiment 1 and comparative example's 1 described raw material to prepare 0.65mm magnesium alloy PC cover, effect such as Fig. 1 of the magnesium alloy PC cover that makes are shown in Figure 2, as can be seen from Figure, after in raw material, having added the multielement rare earth element, alloy surface tension force can be effectively reduced, the castability of magnesium alloy fused mass can be improved.
Embodiment 2
Be used for a kind of magnesium-rare earth of 0.65mm books metallic cover, its raw material and weight percent are:
Diecast magnesium alloy waste material 99.546%
Cerium 0.161%
Lanthanum 0.293%
Rich yttrium mixed rare earth 0%.
Wherein, the diecast magnesium alloy waste material is 1 grade of waste material and 2 grades of waste materials that AZ series diecast magnesium alloy produces after extrusion process, its weight percent consists of: aluminium 10.04%, zinc 0.78%, manganese 0.09%, silicon 0.062%, iron 0.0015%, copper 0.0035%, nickel 0.0005%, beryllium 0.0006%, surplus are Mg and inevitable impurity.
In order to embody the beneficial effect of the embodiment of the invention, following comparative example is set also:
The comparative example 2
A kind of magnesium alloy that is used for 0.65mm books metallic cover, the weight percent of its raw material consists of: aluminium 9.46%, zinc 0.76%, manganese 0.131%, silicon 0.046%, iron 0.0034%, copper 0.0042%, nickel 0.0011%, beryllium 0.0005%, surplus are Mg and inevitable impurity.
Table 4 is that embodiment 2 shows (except the magnesium) with the weight percent composition of 2 two kinds of alloy materials of comparative example.
Table 1 embodiment 1 forms table with the magnesium alloy weight percent that comparative example 1 is used for 0.65mm books metallic cover
| Element | Al | Mn | Zn | Si | Fe | Cu | Ni | Be | La | Ce |
| AZ91D | 9.46 | 0.131 | 0.76 | 0.046 | 0.0034 | 0.0042 | 0.0011 | 0.0005 | - | - |
| AZ91D+RE | 10.04 | 0.090 | 0.78 | 0.062 | 0.0015 | 0.0035 | 0.0005 | 0.0006 | 0.293 | 0.161 |
Corrosion resistance nature and the mechanical property of test implementation example 2 and 2 two kinds of alloy materials of comparative example.
Test result sees Table 5.
Table 5 embodiment 2 and corrosion resistance nature and the mechanical property table of comparative example 2 for the magnesium alloy of 0.65mm books metallic cover
As can be seen from the table, embodiment 2 described magnesium-rare earth model corrosion resistance natures are better, reach 9 grades, improve 2 grades than comparative example 2.And after adding the multiple trace rare earths element, can effectively promote the mechanical property of magnesium alloy.
Embodiment 3
Be used for a kind of magnesium-rare earth of 0.45mm PC panel, its raw material and weight percent are:
Diecast magnesium alloy waste material 99.619%
Cerium 0.113%
Lanthanum 0.162%
Rich yttrium mixed rare earth 0.106%.
Wherein, the diecast magnesium alloy waste material is 1 grade of waste material and 2 grades of waste materials that AZ series diecast magnesium alloy produces after extrusion process, its weight percent consists of: aluminium 9.22%, zinc 0.78%, manganese 0.083%, silicon 0.046%, iron 0.0017%, copper 0.0035%, nickel 0.0011%, beryllium 0.0007%, surplus are Mg and inevitable impurity.
In order to embody the beneficial effect of the embodiment of the invention, following comparative example is set also:
The comparative example 3
A kind of magnesium alloy that is used for 0.45mm PC panel, the weight percent of its raw material consists of: aluminium 8.76%, zinc 0.76%, manganese 0.151%, silicon 0.039%, iron 0.0032%, copper 0.0049%, nickel 0.0018%, beryllium 0.0007%, surplus are Mg and inevitable impurity.
Table 6 is that embodiment 3 shows (except the magnesium) with the weight percent composition of 3 two kinds of alloy materials of comparative example.
Table 6 embodiment 3 forms table with the magnesium alloy weight percent that comparative example 3 is used for the 0.45mmPC panel
| Element | Al | Mn | Zn | Si | Fe | Cu | Ni | Be | La | Ce | Y |
| AZ91D | 8.76 | 0.151 | 0.76 | 0.039 | 0.0032 | 0.0049 | 0.0018 | 0.0007 | - | - | |
| AZ91D+RE | 9.22 | 0.083 | 0.78 | 0.046 | 0.0017 | 0.0035 | 0.0011 | 0.0007 | 0.162 | 0.113 | 0.106 |
Corrosion resistance nature and the mechanical property of test implementation example 3 and 3 two kinds of alloy materials of comparative example.
Test result sees Table 7.
Table 7 embodiment 3 and corrosion resistance nature and the mechanical property table of comparative example 3 for the magnesium alloy of 0.45mmPC panel
As can be seen from the table, embodiment 3 described magnesium-rare earth model corrosion resistance natures are better, reach 9 grades, improve 2 grades than comparative example 3.And after adding the multiple trace rare earths element, can effectively promote the mechanical property of magnesium alloy.
The above is preferred implementation of the present invention, and should be pointed out that is not affecting in the situation of the invention process, the raw material of the described magnesium-rare earth of the embodiment of the invention and weight percent can also for:
Diecast magnesium alloy waste material 97.7%
Cerium 1%
Lanthanum 1%
Rich yttrium mixed rare earth 0.3%.
Wherein, the diecast magnesium alloy waste material is 1 grade of waste material and 2 grades of waste materials that AZ series diecast magnesium alloy produces after extrusion process, its weight percent consists of: aluminium 8%, zinc 0.1%, manganese 0.04%, silicon 0.01%, iron 0.001%, copper 0.002%, nickel 0.0005%, beryllium 0.0005%, surplus are Mg and inevitable impurity.
Perhaps, the raw material of described magnesium-rare earth and weight percent are:
Diecast magnesium alloy waste material 99.8%
Cerium 0.1%
Lanthanum 0.1%
Rich yttrium mixed rare earth 0.01%.
Wherein, the diecast magnesium alloy waste material is 1 grade of waste material and 2 grades of waste materials that AZ series diecast magnesium alloy produces after extrusion process, its weight percent consists of: aluminium 11%, zinc 1%, manganese 0.1%, silicon 0.1%, iron 0.002%, copper 0.004%, nickel 0.001%, beryllium 0.001%, surplus are Mg and inevitable impurity.
Claims (5)
1. a magnesium-rare earth is characterized in that, the raw material of described magnesium-rare earth and weight percent are:
Diecast magnesium alloy waste material 97.7-99.8%
Cerium 0.1-1%
Lanthanum 0.1-1%
Rich yttrium mixed rare earth 0-0.3%.
2. a kind of magnesium-rare earth according to claim 1 is characterized in that, described diecast magnesium alloy waste material is 1 grade of waste material and 2 grades of waste materials that AZ series diecast magnesium alloy produces after extrusion process.
3. a kind of magnesium-rare earth according to claim 2, it is characterized in that, described 1 grade of waste material and 2 grades of waste materials, weight percent consists of: aluminium 8-11%, zinc 0.1-1%, manganese 0.04-0.1%, silicon 0.01-0.1%, iron 0.001-0.002%, copper 0.002-0.004%, nickel 0.0005-0.001%, beryllium 0.0005-0.001%,, surplus is magnesium and inevitable impurity.
4. a kind of magnesium-rare earth according to claim 1 is characterized in that, the weight percent of described cerium is the 0.1-0.2% of magnesium-rare earth total amount.
5. a kind of magnesium-rare earth according to claim 1 is characterized in that, the weight percent of described lanthanum is the 0.1-0.3% of magnesium-rare earth total amount.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504883A (en) * | 2018-04-27 | 2018-09-07 | 江苏大学 | A kind of preparation method of the Mg-LRE-HRE-Zn systems deforming alloy with weak texture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248201A (en) * | 2005-07-20 | 2008-08-20 | Gkss-盖斯特哈赫特研究中心有限责任公司 | Magnesium alloy |
| WO2010146804A1 (en) * | 2009-06-17 | 2010-12-23 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Recycled magnesium alloy, process for producing the same, and magnesium alloy |
| CN102061415A (en) * | 2011-01-19 | 2011-05-18 | 创金美科技（深圳）有限公司 | Die cast magnesium alloy with heat cracking resistance and high fluidity |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101248201A (en) * | 2005-07-20 | 2008-08-20 | Gkss-盖斯特哈赫特研究中心有限责任公司 | Magnesium alloy |
| WO2010146804A1 (en) * | 2009-06-17 | 2010-12-23 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Recycled magnesium alloy, process for producing the same, and magnesium alloy |
| CN102061415A (en) * | 2011-01-19 | 2011-05-18 | 创金美科技（深圳）有限公司 | Die cast magnesium alloy with heat cracking resistance and high fluidity |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504883A (en) * | 2018-04-27 | 2018-09-07 | 江苏大学 | A kind of preparation method of the Mg-LRE-HRE-Zn systems deforming alloy with weak texture |
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Application publication date: 20130130 |