CN100436624C - High-intensity thermal deformation resistant magnesium alloy - Google Patents
High-intensity thermal deformation resistant magnesium alloy Download PDFInfo
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- CN100436624C CN100436624C CNB2007100181064A CN200710018106A CN100436624C CN 100436624 C CN100436624 C CN 100436624C CN B2007100181064 A CNB2007100181064 A CN B2007100181064A CN 200710018106 A CN200710018106 A CN 200710018106A CN 100436624 C CN100436624 C CN 100436624C
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Abstract
A kind of new high strength heat resistant anamorphosis Mg alloy, which can be used at 25deg.C-300deg.C for a long time, the weight percent of the components of it is: Gd 4.5-12.5, Y 2.5-5.0, Zn 0.2-1.0, Zr 0.2-1.0, Mn 0.1-0.5, in the high strength heat resistant anamorphosis Mg alloy, Si<0.025, Fe<0.003, Ni<0.003, Cu<0.003, Cl<0.003, the other is Mg. The normal temperature ability and high temperature ability are improved by the rare earth elements gadolinium and yttrium, and the plastic nature and hot work ability of the alloy are improved for the addition of zinc, zirconium and manganese. It can be prepared according the preparation method of the normal anamorphosis. When it has been hot racked normally and aging treated, the resistance to tensile stress of it at 25deg.C is : 360- 462MPa, the elongation percentage is : 9%-13.7%.The resistance to tensile stress of it at 250deg.C: 270-439MPa, the elongation percentage is: 15%- 18%,.the density is 1.78-1.85g/cm3. The alloy of this patent can be used as the structural material with lightweight and high strength heat resistant ability, it extensively used as main carrier structure of avigation, astronavigation, weapon and civil vehicle.
Description
Technical field
The present invention relates to magnesium alloy, particularly relate to a kind of magnesium alloy with high-strong toughness and high creep strength, it is suitable for the structured material that uses under normal temperature and the high temperature occasion.The present invention is a kind of high-intensity thermal deformation resistant magnesium alloy.
Background technology
Recent two decades comes, and many countries all satisfy the environmental material of light high performance of strategy of sustainable development demand in the world wide in the active research exploitation.In numerous light materials, magnesium alloy is because specific tenacity height, specific modulus height, shock-resistant, anti-electromagnetic wave shielding are good, and casting is easy to reclaiming easily, advantage such as aboundresources causes many industrially developed country and the governmental investigations personnel's of developing country attention day by day in addition.Compare with cast magnesium alloys, wrought magnesium alloys has higher mechanical property and more wide application prospect.We can say the development of wrought magnesium alloys and level of application reflection and represented Mg Alloy Research and application level to a certain extent.Present wrought magnesium alloys (AZ system, ZK system, Mg-Zn-RE system) is though plasticity is better, but room temperature and hot strength are low and creep resistance is on the low side, are difficult to satisfy that Aeronautics and Astronautics, weapons and civil car field are tough to height, the requirement of the lightweight structural material of high heat resistance and high creep strength.
For obdurability and the thermotolerance that improves the deformed magnesium alloy material, many researchers have been carried out a large amount of research work: people such as Kun Yu have reported a kind of novel deformed magnesium alloy Mg-2.8%Ce-0.7%Zn-0.7%Zr (wt.%) at " Scripta Materialia " 2003 the 48th volumes, and this alloy has tensile strength 257.8MPa, unit elongation 12% at 25 ℃.But alloying element and the present invention of this alloy differ greatly, and mechanical property can not be compared with the present invention.People such as L.L.Rokhlin have reported several high strength deformed magnesium alloy Mg-10%Gd-0.6Mn (wt.%) at " Magnesium Alloys Containing Rare Earth Metals ", Mg-10%Gd-6Y-0.6Mn (wt.%) Mg-10Gd-5Y-0.5Mn, Mg-10Gd-3Y-0.4Zr, people such as S.M.He have reported a kind of high strength deformed magnesium alloy Mg-10Gd-2Y-0.5Zr at " Journalof Alloys and Compounds ", described alloy does not contain Zn or do not contain Zn and Mn simultaneously, and is irrelevant with alloy of the present invention.
Through in existing infosystem and network, retrieving, still find no and alloy material of the present invention and the identical bibliographical information of performance.
Summary of the invention
The objective of the invention is to overcome the shortcoming that present wrought magnesium alloys exists, effectively improve the room temperature and the high-temperature mechanical property of material, develop a kind of high tough, high heat resistance, high creep strength, be easy to suitability for industrialized production, can be at the high-intensity thermal deformation resistant magnesium alloy of 25 ℃～300 ℃ of life-time service.
Realization of the present invention is: this high-intensity thermal deformation resistant magnesium alloy, the chemical ingredients of (wt%) this alloy is by weight percentage: be to comprise gadolinium, yttrium, zinc, zirconium and manganese, its weight percent (wt%) is: Gd:4.5～12.5, Y:2.5～5.0, Zn:0.2～1.0, Zr:0.2～1.0, Mn 0.1～0.5, and all the other are that Mg and unavoidable impurities are formed.
Gadolinium is the main strengthening element of alloy among the present invention, and it improves alloy at room temperature intensity by solution strengthening and precipitation strength.And gadolinium forms the high β of thermotolerance (Mg mutually with magnesium
5Gd) can improve the hot strength of alloy.The adding of Y can improve the form of heat-resisting strengthening phase, improves the thermostability of heat-resisting strengthening phase, thereby improves the room temperature and the High-Temperature Strengthening ability of gadolinium.The adding of Zn and Mn can improve the plasticity and the hot workability of alloy.
Realization of the present invention also is: this high-intensity thermal deformation resistant magnesium alloy, each weight percentage allowable of wherein said unavoidable impurities Si, Fe, Ni, Cu is: Si＜0.025, Fe＜0.003, Ni＜0.003, Cu＜0.003, Cl＜0.003.For alloy, impurity is few more good more.
Realization of the present invention also is: warm extrusion pressure or the rolling or violent viscous deformation of forging are adopted in its post forming, and castmethod is permanent mold casting.
Realization of the present invention also is: warm extrusion pressure or the rolling or violent viscous deformation of forging are adopted in its post forming, and its castmethod is for being continuous casting.Be that castmethod is for being continuous casting, post forming employing warm extrusion pressure or the rolling or violent viscous deformation of forging.
High-strength temperature-resistant alloy of the present invention, not only can be prepared into ingot casting with common wrought magnesium alloys preparation method, use for post forming subsequently, also can make ingot casting with continuous casing, warm extrusion is pressed into section bar or forges into forging, for the light material structural part that requires high tough, high heat resistance, high creep strength in Aeronautics and Astronautics, weapons and the civilian vehicle field demand that is widely used.
Because the present invention has added rare-earth element gadolinium, yttrium and metallic element zinc, zirconium and manganese in the Chemical Composition of magnesium alloy, rare-earth element gadolinium and yttrium have strengthened the high-temperature behavior of magnesium alloy, and the adding of zinc, zirconium and manganese has improved the plasticity and the hot workability of magnesium alloy.The present invention tests repeatedly and adjusts ratio and the dosage of add-on to appropriateness, adopt common technology and equipment just can realize producing, the existing height of prepared high-intensity thermal deformation resistant magnesium alloy is tough, high heat resistance, high creep strength, also has suitable plasticity and hot workability simultaneously.Its tensile strength, yield strength all are greatly improved with respect to commercial deformed magnesium alloy, and with respect to commercial deformed magnesium alloy, room temperature tensile strength of the present invention on average improves 14%, and high temperature tensile strength on average improves 56%; The room temperature yield strength on average improves 13%, and high-temperature yield strength on average improves 74%.
Description of drawings:
Fig. 1: as-cast metallographic structure's photo of the embodiment of the invention 1 alloy;
Fig. 2: the metallographic structure photo of ageing treatment after the extruding of the embodiment of the invention 1 alloy;
Fig. 3: as-cast metallographic structure's photo of the embodiment of the invention 2 alloys;
Fig. 4: the metallographic structure photo of ageing treatment after the extruding of the embodiment of the invention 2 alloys;
Fig. 5: as-cast metallographic structure's photo of the embodiment of the invention 3 alloys;
Fig. 6: the metallographic structure photo of ageing treatment after the extruding of the embodiment of the invention 3 alloys;
Fig. 7: embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 11 and commercial deformed Mg contain the mechanical property synopsis of golden ZK60, and the data of ZK60 are the sample of preparation under the similarity condition among the figure, and the data that obtain under same test condition.
Embodiment:
The present invention is described in detail below in conjunction with accompanying drawing
Embodiment 1: adopting castmethod is the plain metal mold casting, and post forming is that common warm extrusion compacting is equipped with alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:12.5, Y:3.0, Zn:0.5Zr:0.5, Mn 0.2, and all the other are that Mg and unavoidable impurities are formed.Each weight percentage allowable of unavoidable impurities Si, Fe, Ni, Cu, Cl is: Si＜0.025, Fe＜0.003, Ni＜0.003, Cu＜0.003, Cl＜0.003.Join through molten, prepare magnesium alloy profiles after hot extrusion, the thermal treatment.Usually adopt common wrought magnesium alloys preparation method just can reach the as above requirement of impurity level.Fig. 1 is as-cast metallographic structure's photo of this alloy, and Fig. 2 is the metallographic structure photo of the extruding postheat treatment of this alloy.From Fig. 2 photo as seen, this alloy extruding postheat treatment is organized as the uniform dynamic recrystallization crystal grain (mean sizes is 5 μ m) and second phase composite.Show that from Fig. 7 this alloy has very high room temperature and mechanical behavior under high temperature, improved 28% than the room temperature tensile strength of commercial deformed magnesium alloy ZK60, high temperature tensile strength improves 95%; It is nearly 27% that the room temperature yield strength has on average improved, and high-temperature yield strength has on average improved 117%.
Embodiment 2: adopting castmethod is the plain metal mold casting, and post forming is a rolling preparation alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:8.5, and Y:5.0, Zn:1.0, Zr:1.0, Mn 0.5, and all the other are that Mg and unavoidable impurities are formed.Each weight percentage allowable of unavoidable impurities Si, Fe, Ni, Cu, Cl is: Si＜0.025, Fe＜0.003, Ni＜0.003, Cu＜0.003, Cl＜0.003.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.Fig. 3 is as-cast metallographic structure's photo of this alloy, and Fig. 4 is the metallographic structure photo of the extruding postheat treatment of this alloy.The extruding postheat treatment of this alloy is organized as the uniform dynamic recrystallization crystal grain (mean sizes is 10 μ m) and second phase composite as can be seen.Referring to Fig. 7, the high-strength temperature-resistant deformed magnesium alloy of visible present embodiment preparation has improved 13% with respect to the room temperature tensile strength of commercial deformed magnesium alloy ZK60, and high temperature tensile strength improves 47%; The room temperature yield strength rise to 18%, high-temperature yield strength has improved 66%.
Embodiment 3: adopting castmethod is the plain metal mold casting, and post forming is a rolling preparation alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:4.5, and Y:5.0, Zn:1.0, Zr:1.0, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment, Fig. 5 is as-cast metallographic structure's photo of this alloy, and Fig. 6 is the metallographic structure photo of the extruding postheat treatment of this alloy.The extruding postheat treatment of this alloy is organized as the uniform dynamic recrystallization crystal grain (mean sizes is 8 μ m) and second phase composite as can be seen.Referring to Fig. 7, the high-strength temperature-resistant deformed magnesium alloy of visible present embodiment preparation is identical with the room temperature tensile strength of ZK60 with respect to the room temperature tensile strength of commercial deformed magnesium alloy ZK60, and high temperature tensile strength improves 20%; The room temperature yield strength has reduced by 4%, and high-temperature yield strength on average improves 25.7%.
Embodiment 4: adopting castmethod is the plain metal mold casting, and post forming is that common warm extrusion compacting is equipped with alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, Y:4.0, Zn:1.0, Zr:1.0, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.This alloy has higher room temperature and mechanical behavior under high temperature, good plasticity.Referring to Fig. 7, the high-strength temperature-resistant deformed magnesium alloy of present embodiment is with respect to commercial deformed magnesium alloy ZK60, and its room temperature tensile strength on average improves 8%, and high temperature tensile strength on average improves 56.8%; The room temperature yield strength on average improves 7.9%, and high-temperature yield strength on average improves 77%.
Embodiment 5: adopt castmethod to be continuous casting, post forming is that common warm extrusion compacting is equipped with alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, and Y:2.5, Zn:1.0, Zr:1.0, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.This alloy has higher room temperature and mechanical behavior under high temperature, good plasticity.
Embodiment 6: adopt castmethod to be continuous casting, post forming is a rolling preparation alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, and Y:3.0, Zn:0.5, Zr:1.0, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.
Embodiment 7: adopt castmethod to be continuous casting, post forming is that violent viscous deformation prepares alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, and Y:3.0, Zn:0.2, Zr:1.0, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.Violent viscous deformation is exactly to wait the passage warm extrusion to press.
Embodiment 8: adopting castmethod is the plain metal mold casting, and post forming is that violent viscous deformation prepares alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, Y:3.0, Zn:0.5, Zr:0.5, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.This alloy has higher room temperature and mechanical behavior under high temperature, good plasticity.
Embodiment 9: adopting castmethod is the plain metal mold casting, and post forming is that common warm extrusion compacting is equipped with alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, Y:3.0, Zn:0.5, Zr:0.2, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.
Embodiment 10: adopting castmethod is the plain metal mold casting, and post forming is a rolling preparation alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, and Y:3.0, Zn:0.5, Zr:0.5, Mn 0.3, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.This alloy has higher room temperature and mechanical behavior under high temperature, good plasticity.
Embodiment 11: adopting castmethod is the plain metal mold casting, and post forming is that common warm extrusion compacting is equipped with alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, Y:3.0, Zn:0.5, Zr:0.5, Mn 0.1, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.Referring to Fig. 7, the high-strength temperature-resistant deformed magnesium alloy of present embodiment preparation is with respect to commercial deformed magnesium alloy ZK60, and its room temperature tensile strength improves 22%, and high temperature tensile strength improves 63%; The room temperature yield strength on average improves 17%, and high-temperature yield strength on average improves 85%.The data of ZK60 are the sample of preparation under the similarity condition among the figure, and the data that obtain under same test condition.
Embodiment 12: adopting castmethod is the plain metal mold casting, and post forming is for forging preparation alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, and Y:3.0, Zn:0.5, Zr:0.2, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.
Embodiment 13: adopt castmethod to be continuous casting, post forming is for forging preparation alloy of the present invention, and (wt%) is as follows for its chemical ingredients: Gd:9.0, and Y:2.5, Zn:1.0, Zr:1.0, Mn 0.5, and foreign matter content is with embodiment 1, and all the other are Mg.Join through molten, prepare magnesium alloy profiles after extruding, the thermal treatment.This alloy has higher room temperature and mechanical behavior under high temperature, good plasticity.
The present invention adopts 9%～13.7%, 250 ℃ of tensile strength 270～439MPa of 25 ℃ of tensile strength 360～462MPa, unit elongation, the unit elongation 15%～18% of the alloy of common wrought magnesium alloys preparation method preparation, density 1.78～1.85g/cm
3Alloy of the present invention can be used as the heat-stable structured material of high-strength light, also can satisfy the demand for the heat-resisting novel material of high-strength light such as Aeronautics and Astronautics, weapons and civilian vehicle.
Claims (4)
1. a high-intensity thermal deformation resistant magnesium alloy is characterized in that comprising gadolinium, yttrium, zinc, zirconium, manganese and magnesium, and its weight percent (wt%) is: Gd:4.5～12.5, Y:2.5～5.0, Zn:0.2～1.0, Zr:0.2～1.0, Mn 0.1～0.5, and all the other are that Mg and unavoidable impurities are formed.
2. according to the high-intensity thermal deformation resistant magnesium alloy in the claim 1, it is characterized in that: each weight percentage allowable of wherein said unavoidable impurities Si, Fe, Ni, Cu, Cl is: Si＜0.025, Fe＜0.003, Ni＜0.003, Cu＜0.003, Cl＜0.003.
3. according to the high-intensity thermal deformation resistant magnesium alloy in claim 1 or 2, it is characterized in that: warm extrusion pressure or forging or rolling are adopted in its post forming, and castmethod is permanent mold casting.
4. according to the high-intensity thermal deformation resistant magnesium alloy of claim 3, it is characterized in that: its castmethod is continuous casting.
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381831B (en) * | 2008-10-29 | 2010-06-09 | 仝仲盛 | High plasticity magnesium alloy |
| CN101760683B (en) * | 2008-12-24 | 2013-04-03 | 沈阳铸造研究所 | High-strength casting magnesium alloy and melting method thereof |
| CN101914712B (en) * | 2010-07-07 | 2012-01-04 | 中南大学 | Extrusion deformation process of high-strength magnesium alloy thick plate |
| CN102312143B (en) * | 2011-10-12 | 2013-01-23 | 中南大学 | Forging method of high-strength heatproof magnesium alloy |
| CN102409213B (en) * | 2011-11-30 | 2013-07-03 | 西安理工大学 | Preparation method of high-strength magnesium alloy enhanced by heat treatment |
| CN103014468A (en) * | 2012-12-20 | 2013-04-03 | 常熟市东方特种金属材料厂 | Magnesium-gadolinium-yttrium alloy |
| CN104195397B (en) * | 2014-09-10 | 2016-11-30 | 山西银光华盛镁业股份有限公司 | A kind of high-intensity thermal deformation resistant magnesium alloy and manufacture method thereof |
| US20160215372A1 (en) * | 2015-01-28 | 2016-07-28 | Medtronic Vascular, Inc. | Biodegradable magnesium alloy |
| CN106148792B (en) * | 2016-08-17 | 2019-02-22 | 上海交通大学 | The wrought magnesium alloy and preparation method thereof of high-intensitive high Gd content |
| CN107058833A (en) * | 2016-11-08 | 2017-08-18 | 中航装甲科技有限公司 | A kind of graphene composite armour material and preparation method thereof |
| CN106636825B (en) * | 2016-11-21 | 2018-07-10 | 孝义市东义镁业有限公司 | A kind of high-strength rare earth magnesium alloy material and preparation method thereof |
| CN110669972B (en) * | 2019-11-08 | 2021-06-11 | 中国兵器工业第五九研究所 | High-strength corrosion-resistant magnesium alloy and preparation method thereof |
| CN113528915B (en) * | 2021-07-09 | 2022-02-11 | 青岛理工大学 | Impact-resistant high-strength heat-resistant magnesium rare earth alloy material |
| CN115094285A (en) * | 2022-06-20 | 2022-09-23 | 山西银光华盛镁业股份有限公司 | Heat-resistant high-strength rare earth magnesium alloy material and preparation method thereof |
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| CN1717500A (en) * | 2003-10-10 | 2006-01-04 | 镁电子有限公司 | Castable magnesium alloys |
| US20070125464A1 (en) * | 2003-11-26 | 2007-06-07 | Yoshihito Kawamura | High strength and high toughness magnesium alloy and method of producing the same |
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| CN1717500A (en) * | 2003-10-10 | 2006-01-04 | 镁电子有限公司 | Castable magnesium alloys |
| US20070125464A1 (en) * | 2003-11-26 | 2007-06-07 | Yoshihito Kawamura | High strength and high toughness magnesium alloy and method of producing the same |
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