CN101215661B - Tough easy-deforming magnesium alloy - Google Patents
Tough easy-deforming magnesium alloy Download PDFInfo
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- CN101215661B CN101215661B CN2008100502182A CN200810050218A CN101215661B CN 101215661 B CN101215661 B CN 101215661B CN 2008100502182 A CN2008100502182 A CN 2008100502182A CN 200810050218 A CN200810050218 A CN 200810050218A CN 101215661 B CN101215661 B CN 101215661B
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Abstract
The invention relates to a novel magnesium alloy material, in particular to a magnesium alloy which has strong toughness and is easy to deform, through compounding and adding cerium, yttrium, gadolinium and strontium, the magnesium alloy which has excellent plastic deformation capacity and high mechanical properties is obtained. The percentage by weight of the components are that aluminum is 2.8-3.2, zinc is 0.8-1.1, magnesium is 0.4-0.7, cerium is 0.4-0.8, yttrium is 0.6-1.2, gadolinium is 3-6, and strontium is 0.08-1.2. The percentage by weight of limited impurity elements are that silicon is less than 0.03, ferric is less than 0.004, cuprum is less than 0.003, nickel is less than 0.002, calcium is less than 0.002, and the other content is magnesium. The single pass maximum lower compression ratio of the invention is greater than 35 percent under the homogenization conditions for 4 hours, and the single pass maximum lower compression ratio is greater than 50 percent under the homogenization conditions for 8 hours. The tensile strength of the invention is greater than 330 MPa in room temperature, and the elongation is greater than 8 percent.
Description
Technical field
The present invention relates to a kind of magnesium alloy materials, particularly relate to a kind of tough easy-deforming magnesium alloy.Mainly be to be used for the lightweight magnesium alloy member that automobile component use.
Background technology
Magnesium alloy is present the lightest structural metallic materials, has that density is low, advantages such as specific tenacity and specific rigidity height, machining property are good, good casting property, is widely used at industrial circle.However, magnesium alloy parts is by extrusion process production mostly.Cast magnesium alloys is difficult to viscous deformation, the press working processability is poor, the comprehensive strength deficiency.Therefore, scientific research institution both domestic and external and enterprise all will research and develop emphasis and transfer on the wrought magnesium alloys product, wrought magnesium alloys sheet material especially, and it has wide practical use in fields such as 3C, aviation, traffic.At present, mainly concentrate on the deformation technique aspect, as extruding, rolling, forging etc. at the research of wrought magnesium alloys.The rolling technology complexity of magnesium alloy, AZ31 wrought magnesium alloys for example need carry out the processing that homogenized in 8 hours rolling as last, and the single pass maximum presses down shrinkage and is no more than 30%, room temperature tensile strength after multi-pass is rolling is generally 300MPa, and unit elongation is no more than 5%.Therefore, the AZ31 magnesium alloy needs multi-pass processing when rolling, increased production cost.This is main because magnesium has close-packed hexagonal structure, and movable at normal temperatures slip system is few, the compatibility of deformation ability.Current, the wrought magnesium alloys product mainly contains series such as magnesium-lithium, magnesium-aluminum-zinc-manganese, magnesium-rare earth, but has not also seen about containing strontium and rare earth (rare earth, wrought magnesium alloys product RE).
Summary of the invention
The object of the present invention is to provide a kind of tough easy-deforming magnesium alloy, the existing good plastic deformation ability of this alloy possesses higher intensity again.
The technical scheme that realizes the object of the invention is: as alloying element in the independent or compound adding magnesium alloy, the adding of strontium and rare earth makes magnesium alloy that less grain fineness number be arranged with rare earth yttrium, gadolinium, cerium and strontium.Grain refining can make the crystal boundary slippage become easy; The dislocation glide journey is shortened, and distortion is carried out evenly; Grain refining can also activate the non-basic slip systems of potential such as the prismatic plane and the conical surface.Strontium and rare earth have also changed the crystalline structure of alloy, and the magnesium alloy lattice symmetry is improved.In addition, strontium and rare earth can change in the magnesium alloy second mutually form and the distribution, make it spread more evenly in the process of homogenizing, and reduce the probability that crackle occurs.Above several respects all can improve the plastic deformation ability of magnesium alloy.It is rolling that as cast condition Mg-RE-Sr alloy is at high temperature passed through multi-pass, and the existing mechanical property preferably of the magnesium alloy sheet that obtains possesses good plastic deformation ability again.
The present invention relates to a kind of novel rare earth, strontium tough easy-deforming magnesium alloy of containing, component comprises Al, Zn, Mn, Ce, Y, Gd, Sr, Mg, and its weight percentages of components is: (2.8-3.2Al, 0.8-1.1Zn, 0.4-0.7Mn, 0.4-0.8Ce, 0.6-1.2Y, 3-6Gd, 0.08-0.12Sr), the weight percent of restriction impurity content: (Si＜0.03, Fe＜0.004, Cu＜0.003, Ni＜0.002, Ca＜0.002), all the other are Mg.
Complete processing is: add pure magnesium, pure zinc, fine aluminium, the electrolytic manganese of preheating in smelting furnace, alloy melting temp is 700 ℃.Treat that alloy all melts the back and adds magnesium-yttrium, magnesium-gadolinium, magnesium-cerium, aluminium-strontium master alloy is increased to 720 ℃ with temperature and continues meltings 30 minutes, stirs therebetween to make for twice melt evenly and add the feeding shielding gas.Cooled to 680 ℃ of static 15-20 minutes, and skimmed melt top layer scum silica frost, be cast into alloy sheets then, alloy sheets is further cut into the plate of thick 4mm with wire cutting machine.Alloy sheets after the cutting is placed the heat treatment furnace processing that homogenizes under 350 ℃, it is rolling to carry out single pass and multi-pass then respectively.One-pass roller is rolling at the different time laggard limit by row that homogenizes, and presses down shrinkage to record the single pass maximum; Multi-pass is rolling to carry out after homogenizing in 8 hours, and every time draft is 10%, each all alloy sheets is placed in the heat treatment furnace 10 minutes after rolling to remove stress, carries out rollingly next time then, and the rolled sheet metal that finally obtains is carried out Mechanics Performance Testing.
The single pass maximum of the present invention under 4 hours conditions that homogenize presses down shrinkage greater than 35%, and the single pass maximum under 8 hours conditions that homogenize presses down shrinkage greater than 50%.Room temperature tensile strength of the present invention is greater than 330MPa, and unit elongation is greater than 8%.
Embodiment
Below with reference to embodiment the present invention is further described:
Implementation column 1
The composition of alloy (weight percent) is: 2.85Al, 0.92Zn, 0.53Mn, 0.67Ce, 1.0Y, and weight percent Si＜0.03 of restriction impurity element, Fe＜0.004, Cu＜0.003, Ni＜0.002, Ca＜0.002, all the other are Mg.Press the mentioned component alloyage, in smelting furnace, add pure magnesium, pure zinc, fine aluminium, the electrolytic manganese of preheating, set 700 ℃ of furnace temperature.Treat that alloy all melts the back and adds magnesium-cerium master alloy and magnesium-yttrium master alloy and furnace temperature is risen to 720 ℃ and continued molten alloy 30 minutes, stir therebetween and make for twice melt even, add the shielding gas protection simultaneously.Cool to 680 ℃ static 20 minutes, skim melt top layer scum silica frost, be cast into alloy sheets then, alloy sheets is further cut into the plate of thick 4mm with wire cutting machine.Alloy sheets after the cutting is placed the heat treatment furnace processing that homogenizes under 350 ℃, it is rolling to carry out single pass and multi-pass then respectively.One-pass roller is rolling at the different time laggard limit by row that homogenizes, and presses down shrinkage to record the single pass maximum; Multi-pass is rolling to carry out after homogenizing in 8 hours, and every time draft is 10%, each all alloy sheets is placed in the heat treatment furnace 10 minutes after rolling to remove stress, carries out rollingly next time then, and the rolled sheet metal that finally obtains is carried out Mechanics Performance Testing.The single pass maximum of the present invention under 4 hours conditions that homogenize presses down shrinkage greater than 35%, and the single pass maximum under 8 hours conditions that homogenize presses down shrinkage greater than 50%.Room temperature tensile strength of the present invention is greater than 330Mpa, and unit elongation is greater than 8%.
Embodiment 2
The composition of alloy (weight percent) is: 3.05Al, 0.86Zn, 0.41Mn, 0.4Ce, 0.6Y, 6.0Gd, and weight percent Si＜0.03 of restriction impurity element, Fe＜0.004, Cu＜0.003, Ni＜0.002, Ca＜0.002, all the other are Mg.Press the mentioned component alloyage, in smelting furnace, add pure magnesium, pure zinc, fine aluminium, the electrolytic manganese of preheating, set 700 ℃ of furnace temperature.Treat that alloy all melts back adding magnesium-yttrium master alloy, magnesium-cerium master alloy and magnesium-gadolinium master alloy and furnace temperature is risen to 720 ℃ of continuation molten alloy 30 minutes, stir therebetween to make for twice melt even, add the shielding gas protection simultaneously.Cool to 680 ℃ static 20 minutes, skim melt top layer scum silica frost, be cast into alloy sheets then, alloy sheets is further cut into the plate of thick 4mm with wire cutting machine.Alloy sheets after the cutting is placed the heat treatment furnace processing that homogenizes under 350 ℃, it is rolling to carry out single pass and multi-pass then respectively.One-pass roller is rolling at the different time laggard limit by row that homogenizes, and presses down shrinkage to record the single pass maximum; Multi-pass is rolling to carry out after homogenizing in 8 hours, and every time draft is 10%, each all alloy sheets is placed in the heat treatment furnace 10 minutes after rolling to remove stress, carries out rollingly next time then, and the rolled sheet metal that finally obtains is carried out Mechanics Performance Testing.The single pass maximum of the present invention under 4 hours conditions that homogenize presses down shrinkage greater than 35%, and the single pass maximum under 8 hours conditions that homogenize presses down shrinkage greater than 50%.Room temperature tensile strength of the present invention is greater than 330Mpa, and unit elongation is greater than 8%.
Embodiment 3
The composition of alloy (weight percent) is: 3.05Al, 0.86Zn, 0.41Mn, 0.08Sr, 0.8Ce, 1.2Y, and weight percent Si＜0.03 of restriction impurity element, Fe＜0.004, Cu＜0.003, Ni＜0.002, Ca＜0.002, all the other are Mg.Press the mentioned component alloyage, in smelting furnace, add pure magnesium, pure zinc, fine aluminium, the electrolytic manganese of preheating, set 700 ℃ of furnace temperature.Treat that alloy all melts the back and adds magnesium-yttrium master alloy, magnesium-cerium master alloy and aluminium-strontium master alloy, and furnace temperature is risen to 720 ℃ continued molten alloy 30 minutes, stir therebetween and make for twice melt even, add the shielding gas protection simultaneously.Cool to 680 ℃ static 20 minutes, skim melt top layer scum silica frost, be cast into alloy sheets then, alloy sheets is further cut into the plate of thick 4mm with wire cutting machine.Alloy sheets after the cutting is placed the heat treatment furnace processing that homogenizes under 350 ℃, it is rolling to carry out single pass and multi-pass then respectively.One-pass roller is rolling at the different time laggard limit by row that homogenizes, and presses down shrinkage to record the single pass maximum; Multi-pass is rolling to carry out after homogenizing in 8 hours, and every time draft is 10%, each all alloy sheets is placed in the heat treatment furnace 10 minutes after rolling to remove stress, carries out rollingly next time then, and the rolled sheet metal that finally obtains is carried out Mechanics Performance Testing.The single pass maximum of the present invention under 4 hours conditions that homogenize presses down shrinkage greater than 35%, and the single pass maximum under 8 hours conditions that homogenize presses down shrinkage greater than 50%.Room temperature tensile strength of the present invention is greater than 330Mpa, and unit elongation is greater than 8%.
Embodiment 4
The composition of alloy (weight percent) is: 2.93Al, 0.98Zn, 0.58Mn, 0.1Sr, 0.75Ce, and weight percent Si＜0.03 of restriction impurity element, Fe＜0.004, Cu＜0.003, Ni＜0.002, Ca＜0.002, all the other are Mg.Press the mentioned component alloyage, in smelting furnace, add pure magnesium, pure zinc, fine aluminium, the electrolytic manganese of preheating, set 700 ℃ of furnace temperature.Treat that alloy all melts the back and adds aluminium-strontium master alloy and magnesium-cerium master alloy and furnace temperature is risen to 720 ℃ and continued molten alloy 30 minutes, stir therebetween and make for twice melt even, add the shielding gas protection simultaneously.Cool to 680 ℃ static 20 minutes, skim melt top layer scum silica frost, be cast into alloy sheets then, alloy sheets is further cut into the plate of thick 4mm with wire cutting machine.Alloy sheets after the cutting is placed the heat treatment furnace processing that homogenizes under 350 ℃, it is rolling to carry out single pass and multi-pass then respectively.One-pass roller is rolling at the different time laggard limit by row that homogenizes, and presses down shrinkage to record the single pass maximum; Multi-pass is rolling to carry out after homogenizing in 8 hours, and every time draft is 10%, each all alloy sheets is placed in the heat treatment furnace 10 minutes after rolling to remove stress, carries out rollingly next time then, and the rolled sheet metal that finally obtains is carried out Mechanics Performance Testing.The single pass maximum of the present invention under 4 hours conditions that homogenize presses down shrinkage greater than 35%, and the single pass maximum under 8 hours conditions that homogenize presses down shrinkage greater than 50%.Room temperature tensile strength of the present invention is greater than 330Mpa, and unit elongation is greater than 8%.
Embodiment 5
The composition of alloy (weight percent) is: 3.02Al, 1.03Zn, 0.66Mn, 0.12Sr, 0.59Ce, 0.91Y, 5Gd, weight percent Si＜0.03 of restriction impurity element, Fe＜0.004, Cu＜0.003, Ni＜0.002, Ca＜0.002, all the other are Mg.Press the mentioned component alloyage, in smelting furnace, add pure magnesium, pure zinc, fine aluminium, the electrolytic manganese of preheating, set 700 ℃ of furnace temperature.Treat that alloy all melts the back and adds aluminium-strontium master alloy, magnesium-yttrium master alloy and magnesium-cerium master alloy and magnesium-gadolinium master alloy and furnace temperature is risen to 720 ℃ and continued molten alloy 30 minutes, stir therebetween and make for twice melt even, add the shielding gas protection simultaneously.Cool to 680 ℃ static 20 minutes, skim melt top layer scum silica frost, be cast into alloy sheets then, alloy sheets is further cut into the plate of thick 4mm with wire cutting machine.Alloy sheets after the cutting is placed the heat treatment furnace processing that homogenizes under 350 ℃, it is rolling to carry out single pass and multi-pass then respectively.One-pass roller is rolling at the different time laggard limit by row that homogenizes, and presses down shrinkage to record the single pass maximum; Multi-pass is rolling to carry out after homogenizing in 8 hours, and every time draft is 10%, each all alloy sheets is placed in the heat treatment furnace 10 minutes after rolling to remove stress, carries out rollingly next time then, and the rolled sheet metal that finally obtains is carried out Mechanics Performance Testing.The single pass maximum of the present invention under 4 hours conditions that homogenize presses down shrinkage greater than 35%, and the single pass maximum under 8 hours conditions that homogenize presses down shrinkage greater than 50%.Room temperature tensile strength of the present invention is greater than 330Mpa, and unit elongation is greater than 8%.
Claims (1)
1. tough easy-deforming magnesium alloy, component comprises Al, Zn, Mn, Ce, Y, Gd, Sr, Mg, it is characterized in that component weight percent content is: 2.8-3.2Al, 0.8-1.1Zn, 0.53-0.7Mn, 0.75-0.8Ce, 0.91-1.2Y, 5-6Gd, 0.08-0.12Sr, weight percent Si＜0.03 of restriction impurity content, Fe＜0.004, Cu＜0.003, Ni＜0.002, Ca＜0.002, all the other are Mg.
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| CN2008100502182A CN101215661B (en) | 2008-01-07 | 2008-01-07 | Tough easy-deforming magnesium alloy |
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| CN2008100502182A CN101215661B (en) | 2008-01-07 | 2008-01-07 | Tough easy-deforming magnesium alloy |
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| CN101215661B true CN101215661B (en) | 2011-05-25 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781730A (en) * | 2010-03-22 | 2010-07-21 | 北京工业大学 | Low-cost heat-resisting magnesium alloy and preparation method thereof |
| CN102162054B (en) * | 2011-03-30 | 2013-11-20 | 沈阳工业大学 | High-toughness magnesium alloy and preparation method thereof |
| CN102517480A (en) * | 2012-01-08 | 2012-06-27 | 吉林大学 | High-work-hardening magnesium alloy and preparation method thereof |
| CN104109787A (en) * | 2013-04-18 | 2014-10-22 | 嘉兴中科亚美合金技术有限责任公司 | Cerium-containing deformed magnesium alloy suitable for sheet material and preparation method |
| CN103305737B (en) * | 2013-06-19 | 2015-02-11 | 山东蒙沃变速器有限公司 | Grain refinement type cast magnesium alloy and preparation method thereof |
| CN103695742B (en) * | 2014-01-16 | 2015-07-29 | 徐茂航 | A kind of creep resistance Dow metal and preparation method thereof |
| CN106011572B (en) * | 2016-05-18 | 2017-11-07 | 大连理工大学 | A kind of high roll forming ability magnesium-rare earth alloy and preparation method thereof |
| CN109797332B (en) * | 2019-03-29 | 2021-01-19 | 南京航空航天大学 | High-strength-toughness heat-resistant Mg-Gd-Y alloy suitable for low-pressure casting and preparation method thereof |
| CN112813323B (en) * | 2020-12-31 | 2021-12-24 | 长沙理工大学 | Pre-deformation magnesium alloy and processing method thereof |
| CN113981259B (en) * | 2021-11-01 | 2022-06-28 | 吉林大学 | Magnesium-aluminum-tin-calcium alloy and preparation method thereof |
| CN115044812A (en) * | 2022-06-17 | 2022-09-13 | 北京机科国创轻量化科学研究院有限公司 | High-elongation microalloyed modified AZ31 magnesium alloy sheet material and preparation method thereof |
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| EP1688509A1 (en) * | 2003-11-26 | 2006-08-09 | KAWAMURA, Yoshihito | High strength and high toughness magnesium alloy and method for production thereof |
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