CN100365147C - Method for manufacturing of magnesium alloy material with high malleability - Google Patents
Method for manufacturing of magnesium alloy material with high malleability Download PDFInfo
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- CN100365147C CN100365147C CNB021306095A CN02130609A CN100365147C CN 100365147 C CN100365147 C CN 100365147C CN B021306095 A CNB021306095 A CN B021306095A CN 02130609 A CN02130609 A CN 02130609A CN 100365147 C CN100365147 C CN 100365147C
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Abstract
The present invention discloses a method for manufacturing a magnesium alloy material with high ductility, which is used for manufacturing a magnesium alloy material capable of carrying out plastic deformation processing at room temperature. The manufacturing technology comprises the steps that a magnesium alloy material containing Li and other alloy elements is melted and then is cast into a cast ingot in a vacuum smelting furnace or a protective furnace led with inert gas, and then a material is manufactured in a squeezing mode or in a rolling mode. The magnesium alloy material with high ductility has preferable plastic deformation capability at room temperature, completely improves the disadvantage of insufficient formability of a traditional commercial magnesium alloy at room temperature and can be used as structural elements of industrial products, such as vehicles, electronic information products, appliances, 0A, etc.
Description
Technical field
Magnesium alloy is the lightest structure material material of proportion in the practical metallic substance, have high specific strength, high specific rigidity, and its thermal diffusivity, EMI suppression (electromagnetic interference) characteristic and reclaiming excellence, therefore, really be the best materials that meets environmental protection and require lightweight structure spare; Yet, the room temperature plasticity difference of magnesium alloy is to hinder the maximum bottleneck of its application, the present invention relates to a kind of magnesium alloy material with high malleability manufacture method, mainly is the interpolation by the specific alloy element, change its crystal structure structure, thereby promoted the plastic deformation ability of room temperature.
Background technology
Pursue in the light-weighted trend in vehicle, electronics information product, household electrical appliances and 0A (office automation) industry in recent years, Application of Magnesium is subjected to attracting attention of each field.Yet the room temperature plasticity of general in the past conventional commercial magnesium alloy was poor, so the making of magnesium alloy structural part mostly adopts casting (Cast) method of solidifying based on fusion, and was especially in the majority with the working method of casting forming or injection molding.Particularly for the shaping of thin-wall part, the qualification rate of casting forming or injection molding is low, causes the manufacturing puzzlement of magnesium alloy finished product.
Interpolation Y or Si are arranged in early days to promote the patent report of magnesium alloy superplastic forming and manufacturing, but because of forming temperature still must be up to 200 ℃ about, plasticity at room temperature is still not enough, and manufacture method adopts complicated molten soup emergency cooling solidification method, is not easy in the operation and not general.
General magnesium alloy must be heated to just has enough plastic deformation abilities more than 200 ℃, so the qualification rate of finished product being made in Zhan Shencai (Wrought Materials) punching press in room temperature is on the low side, is restricted on practical face.In addition, magnesium and lithium are active high alloying element, molten method of completing the square difficulty, if adopt the molten soup emergency cooling solidification method of aforementioned patent again, not only operation is difficult for and the molding shape with limited.
Summary of the invention
The present invention is because the problem on the conventional art; purpose is not only can keep the low density characteristic of magnesium alloy; and via being cast into ingot casting after vacuum melting furnace or the fusion of logical inert atmosphere furnace; extrude again or roll and prolong into the high ductibility magnesium alloy material, become various functional element for follow-up stamped.
The manufacture method of magnesium alloy material with high malleability provided by the invention, its step is as follows:
(1) with magnesium material and zinc, aluminium ... at first insert in the smelting furnace crucible etc. the alloying element of higher melt, then pumping high vacuum and inject a normal atmosphere or a little negative pressure (argon gas 600Torr) (2) smelting furnace carries out induction heating, makes in the above-mentioned crucible material fusion and is mixed into even molten alloy;
(3) add the lithium material in molten alloy, control molten alloy temperature stirs between 700～800 ℃;
(4) molten alloy is watered cast from the mold that presets, ingot casting is waited to solidify the cooling back and is taken out;
(5) ingot casting is done modifier treatment in a hour at 300 ℃, and then ingot casting rolls continuously at 200 ℃ and prolongs into sheet material, or adopts to roll in room temperature and prolong, but rolls when the cold rolling amount of prolonging reaches to renew after must doing 200 ℃ of of short duration technologies annealing after 30%.
Below in conjunction with drawings and Examples, describe details of the present invention and advantage thereof in detail.
Description of drawings
Fig. 1: for conventional commercial AZ31 magnesium alloy is taken out the enforcement illustration that breaks deeply.
Fig. 2: be the manufacturing flow chart of magnesium alloy material with high malleability of the present invention.
Fig. 3: be pumped into the enforcement illustration that forms merit for high ductibility magnesium alloy of the present invention deeply.
Fig. 4: be pumped into another angle that forms merit deeply for high ductibility magnesium alloy of the present invention and implement illustration.
Embodiment
＜embodiment〉vacuum oven and atmosphere furnace alloy melting
Magnesium elements is high to the avidity of oxygen, must carry out in vacuum oven or oxygen-free atmosphere stove so its alloy is refined, and the making of high ductibility magnesium alloy can not make an exception.At first reorganize and outfit vacuum oven, the function of checking each Controlling System is normally denied and specific crucible is planted admittedly in load coil, can set about magnesium alloy material with high malleability and found (please refer to shown in Figure 2), and its step is as follows:
1. with magnesium material and zinc, aluminium ... insert earlier in the smelting furnace crucible etc. the alloying element of higher melt, then pumping high vacuum and inject a normal atmosphere or negative pressure (argon gas 600Torr) a little;
2. smelting furnace carries out induction heating, makes the interior material fusion of above-mentioned crucible and is mixed into even molten alloy;
3. add the lithium material in molten alloy, control molten alloy temperature stirs between 700～800 ℃; Wherein, the content≤15.6wt% of 8.6wt%≤lithium material;
4. molten alloy is watered and cast from the mold that presets, ingot casting is waited to solidify smelting and is but taken out the back.
＜embodiment〉the magnesium alloy material with high malleability design
The reason of present conventional commercial magnesium alloy poor ductility, be that itself material structure can't escape hexagonal crystal tissue and have hard Jie's metal (Intermetallics) to take place, so the design guideline of high ductibility magnesium alloy is the interpolation that utilizes the specific alloy element, meal with wine to be changing its crystal structure structure and to avoid the generation of metal that is situated between as far as possible, thereby optimizes it and prolong toughness and material forming.For keeping the lightest construction material properties of magnesium alloy proportion, the interpolation of alloying element is a main shaft with the demand of low density element and energy reinforced alloys.
Have the low-density characteristic of high-strength high-tractility through systematic, the careful Mg-Li alloy of discovering, this two high one low characteristic meets the demand of the compact product of present industry fully, and market potential is infinite.When containing the lithium amount in the magnesium alloy above 6% weight percent, promptly there is tangible body-centred structure tissue to produce, raising along with the lithium addition, body-centred structure is organized also to be increased relatively, this is meaning alloy ductility and is also improving relatively, but adding, over-drastic will undermine alloy strength, so be advisable to be no more than 20%.
Following table compares for the alloy composition and the mechanical properties of four kinds of magnesium lithium alloys of the present invention and conventional commercial magnalium (AZ31-0).The room temperature mechanical intensity and the elongation of AZ31 magnalium sheet material are all poor, elongation only 11%; Four kinds of magnesium lithium alloy ingot castings of present embodiment are of a size of 260 * 130 * 80mm, weigh 4.1 kilograms, proportion about 1.5, ingot casting is after the modifier treatment in a hour of 300 ℃ of dos, can then roll continuously and prolong into sheet material at 200 ℃, or adopt to roll and prolong in room temperature, but must do 200 ℃ of of short duration technologies annealing (Inter-annealing) and renew and roll when the cold rolling amount of prolonging reaches after 30%, the physical strength of these a little sheet materials and elongation are all excellent relatively many, and especially elongation is up to more than 40%.
In addition, high ductibility magnesium alloy of the present invention also can directly extrude (Extrusion Forming) one-tenth plate, rod at 200-400 ℃ ... Deng section bar, to increase its application surface.
| Alloy composition (wt%) | The mechanical properties of room temperature | ||||
| Li | Zn | Al | Yield strength (MPa) | Elongation (%) | |
| Magnalium | - | 1 | 3 | 105 | 11 |
| Magnesium lithium alloy 1 | 8.6 | 1.09 | - | 135 | 42 |
| |
9.3 | 1.10 | - | 160 | 40 |
| Magnesium lithium alloy 3 | 10.1 | 1.10 | - | 161 | 39 |
| |
15.6 | 1.07 | - | 101 | 45 |
＜embodiment〉be pumped into shape (Deep Drawing) deeply
Process the crystallized ability of inquiring under the magnesium alloy room temperature of the present invention to be pumped into shape (Deep Drawing) deeply.Adopt 100Ton MTS tensile testing machine, the diagonal angle line length that square squeezes bar (Punch) is 45mm, and chuck speed is 2.5mm/s, makes lubricant with Paraffin liquid.
Be pumped into shape deeply than (Limiting Drawing Ratio LDR) appraises the quality of material forming through discussion, and LDR is the diagonal angle line length of plain plate and the ratio that square squeezes the diagonal angle line length of bar with critical.
Conventional commercial magnesium alloy AZ31 at room temperature can't take out with above-mentioned condition and make shape, and it is for example shown in Figure 1 to break, and high ductibility magnesium alloy of the present invention (0.2mm heavy-gauge sheeting) at room temperature not only can take out and make shape (as Fig. 3 and Fig. 4), and its LDR value can be up to 1.5.
Claims (2)
1. the manufacture method of a magnesium alloy material with high malleability is characterized in that, its step is as follows:
(1) magnesium metallic substance and zinc alloy element are at first inserted in the smelting furnace crucible, then pumping high vacuum and inject a normal atmosphere or-argon gas of 600Torr negative pressure;
(2) smelting furnace carries out induction heating, makes the material fusion of inserting in the above-mentioned crucible and is mixed into even molten alloy;
(3) add the lithium material in molten alloy, control molten alloy temperature stirs between 700～800 ℃;
(4) molten alloy is watered cast from the mold that presets, ingot casting is waited to solidify the cooling back and is taken out;
(5) ingot casting is done modifier treatment in a hour at 300 ℃, and then ingot casting rolls continuously at 200 ℃ and prolongs into sheet material, or adopts room temperature to roll and prolong, but rolls when the cold rolling amount of prolonging reaches to renew after palpus is done 200 ℃ of of short duration technology annealing after 30%;
(6) contain 3～20 weight % lithium and zinc in the above-mentioned magnesium alloy material with high malleability.
2. the manufacture method of magnesium alloy material with high malleability according to claim 1 is characterized in that: alloy directly extrudes into plate, rod or to increase other section bar of its application surface at 200～400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021306095A CN100365147C (en) | 2002-09-09 | 2002-09-09 | Method for manufacturing of magnesium alloy material with high malleability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021306095A CN100365147C (en) | 2002-09-09 | 2002-09-09 | Method for manufacturing of magnesium alloy material with high malleability |
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| CN1482268A CN1482268A (en) | 2004-03-17 |
| CN100365147C true CN100365147C (en) | 2008-01-30 |
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| CNB021306095A Expired - Fee Related CN100365147C (en) | 2002-09-09 | 2002-09-09 | Method for manufacturing of magnesium alloy material with high malleability |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN102925772A (en) * | 2012-10-31 | 2013-02-13 | 重庆大学 | Magnesium alloy plate serving as battery cathode and preparation method thereof |
| JP7078839B2 (en) * | 2017-12-12 | 2022-06-01 | 富士通株式会社 | Magnesium alloy, its manufacturing method, and electronic equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5624632A (en) * | 1995-01-31 | 1997-04-29 | Aluminum Company Of America | Aluminum magnesium alloy product containing dispersoids |
| CN1302912A (en) * | 2001-02-14 | 2001-07-11 | 宁夏鑫达镁业有限公司 | Process for preparing Mg-alloy |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5624632A (en) * | 1995-01-31 | 1997-04-29 | Aluminum Company Of America | Aluminum magnesium alloy product containing dispersoids |
| CN1302912A (en) * | 2001-02-14 | 2001-07-11 | 宁夏鑫达镁业有限公司 | Process for preparing Mg-alloy |
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