CN100457944C - Thermal deformation resistant magnesium alloy - Google Patents
Thermal deformation resistant magnesium alloy Download PDFInfo
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- CN100457944C CN100457944C CNB2007100246374A CN200710024637A CN100457944C CN 100457944 C CN100457944 C CN 100457944C CN B2007100246374 A CNB2007100246374 A CN B2007100246374A CN 200710024637 A CN200710024637 A CN 200710024637A CN 100457944 C CN100457944 C CN 100457944C
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Abstract
A kind of heat resistant anamorphosis magnesium alloy which is heat-resistant, he weight percent of the components in it is: Al: 2.5-4.5%; Mn: 0.2-0.5%, Zn: 0.6-1.4%; Ce: 0.5-1.5%, Sr: 0.01-0.5%, Si: <= 0.05%, Fe: <=0.004%, Cu: <=0.01%, Ni: <=0.002%, the other is Mg. Cerium, which is a kind of rare earth component, and Strontium which is a kind of metal will be added in during the actual melting technology of Magnesium alloy, the mechanical capability under high temperate will be improved for the complex function of them, it can sequentially fulfill higher need.
Description
Technical field
The invention belongs to the magnesium alloy production technical field, relate in particular to a kind of heat-resistant deforming magnesium alloy.
Background technology
The AZ31 alloy is present the most frequently used commercial wrought magnesium alloys, this and its extrudability can be high and good comprehensive mechanical property be undivided, but the AZ31 alloy has significant surrender anisotropy and narrower processing interval, and its yield strength is low, increase along with extrusion speed, the temperature that produces in the extrusion process also raises, and makes the temperature at the mould outlet place sharply rise, and can cause the significant grain growth of extruding end of a period product like this.Strengthening phase in the AZ31 alloy has only Mg
17Al
12,, can not form enough pinnings to stop growing up of crystal grain because its lower high-temperature stability can be fallen in fusion in extrusion process.
For the AZ31 alloy, rapid deterioration so its high temperature creep property is relatively poor, can not use in higher temperature Working environment its mechanical property along with the temperature rising usually.At present, growing along with science and technology, require magnesium alloy not only to have the good mechanical performance at normal temperatures, also need it under the condition of high temperature, still will keep the good mechanical performance simultaneously and have high temperature creep property preferably, just can be more suitable for its large-scale application in civilian industry.
Summary of the invention
Technical problem to be solved by this invention is the problem that mechanical behavior under high temperature is relatively poor and crystal grain is thick of existing AZ31 magnesium alloy, a kind of heat-resistant deforming magnesium alloy of thin crystalline substance is provided, the above-mentioned performance of magnesium alloy materials is had the more production of hi-tech requirement further to satisfy.
The weight percent of each component of the present invention is: Al:2.5～4.5%; Mn:0.2～0.5%, Zn:0.6～1.4%; Ce:0.5～1.5%, Sr:0.01～0.5%, Si: Fe≤0.05%: Cu≤0.004%: Ni≤0.01% :≤0.002%, surplus is Mg.
Preparation method of the present invention comprises the steps:
1, industrial magnesium ingot, aluminium ingot, zinc ingot metal are dropped in the off-the-shelf clean crucible adds end flux melts, the consumption of end flux accounts for 1.5～2.5% of quality of furnace charge, be sprinkled into insulating covering agent in the process to prevent burning, the consumption of insulating covering agent accounts for 0.3～0.5% of quality of furnace charge, the whole melting process time is controlled at 2～6h, and magnesium liquid outlet temperature is controlled at 670～690 ℃;
2, after fusing finishes, blowing argon gas in magnesium liquid, and adopt mechanical stirring, and adding refining agent and Manganous chloride tetrahydrate simultaneously and carry out refining, the consumption of refining agent accounts for 1.5～2.5% of quality of furnace charge, and the time is controlled at 45min, and temperature is controlled at 690～720 ℃;
3, after refining finishes, add rare-earth element cerium and Preparation of Metallic Strontium when liquid magnesium alloy is controlled at 700～720 ℃, the time is controlled at 10min, and temperature is controlled at 700～720 ℃;
4, leave standstill cooling after the end, make flux and inclusion sedimentation, the time is controlled at 30min, and temperature is controlled at 660～680 ℃;
5, at last under 660～680 ℃ of temperature condition, and pour into a mould in protective atmosphere, protective atmosphere is generally SF
6, CO
2, N
2, SO
2, dry air mixed gas or mixed gas protected atmosphere.
Existing end flux, insulating covering agent, the refining agent that is useful on magnesium alloy preparation technology all can use in preparation process of the present invention.
The present invention is by adding rare-earth element cerium, by the heat-resisting phase constitution that cerium and magnesium form, pinning is lived crystal boundary and intracrystalline dislocation motion effectively, becomes the important obstruction that hinders dislocation motion and crystal grain distortion, kept that material has higher dislocation under the high temperature, improved the intensity of alloy under the high temperature.
The present invention is by adding rare-earth element cerium, and by forming compound with magnesium, small and dispersed is distributed in the matrix, plays the effect of reinforced alloys and thinning microstructure.
The present invention significantly improves its creep-resistant property by adding rare-earth element cerium by precipitation hardened the interaction mutually with crystal boundary.Simultaneously trivalent rare earth element has improved electron density, it is interatomic in conjunction with the lining to strengthen magnesium alloy, has reduced magnesium 200～300 ℃ atomic diffusion speed.
The present invention is by adding Preparation of Metallic Strontium, and obviously refinement microstructure has reduced the surface tension of alloy melt, thereby helps the feeding capacity of alloy liquid.
The present invention can also reduce micro-shrinkage porosite by adding Preparation of Metallic Strontium by solid the separating out of gas of hydrogen effect minimizing of strontium, increases the density of foundry goods.
The present invention is by adding rare-earth element cerium and Preparation of Metallic Strontium simultaneously, and its Combined Processing is the refinement alloy organizing significantly, and to Mg
17Al
12Produce metamorphism mutually, by to the refinement of alloy structure with to Mg
17Al
12The rotten effect that has the inhibition crackle to form or delay crack propagation of phase.
The present invention is by adding rare earth element and Preparation of Metallic Strontium simultaneously, and its Combined Processing significantly improves the alloy at room temperature mechanical property.
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment 1:
Magnesium ingot 1128kg, aluminium ingot 30kg, zinc ingot metal 16.8kg dropped into add flux 18kg fusing at the bottom of the RJ-2 in the off-the-shelf clean crucible, be sprinkled into RJ-4 insulating covering agent 3.6kg in the process to prevent burning, the whole melting process time is controlled at 4h, and magnesium liquid outlet temperature is controlled at 670 ℃; After fusing finished, blowing argon gas in magnesium liquid, and employing mechanical stirring added RJ-6 refining agent 30kg simultaneously and Manganous chloride tetrahydrate 13.75kg carries out refining, and the time is controlled at 45min, and temperature is controlled at 690 ℃; After refining finishes, add rare-earth element cerium 18kg and Preparation of Metallic Strontium 1.2kg when liquid magnesium alloy is controlled at 700 ℃, the time is controlled at 10min, and temperature is controlled at 700 ℃; Leave standstill cooling after the end, make flux and inclusion sedimentation, the time is controlled at 30min, and temperature is controlled at 660 ℃; At last under 660 ℃ of temperature condition, and pour into a mould in protective atmosphere, protective atmosphere is generally CO
2Protective atmosphere is cast down.The weight percent of the chemical composition of the magnesium alloy that makes like this is Al:2.5%; Mn:0.5%, Zn:1.4%; Ce:1.5%, Sr:0.1%, Si: Fe≤0.05%: Cu≤0.004%: Ni≤0.01% :≤0.002%, surplus is Mg.
Since magnesium liquid leave standstill carry slag and after the deimpurity process of sedimentation in, have part material and be eliminated, add the reason of high temperature oxidation, the yield rate of making is between 95～96%.Therefore certain when sampling analysis, might occur and become to distribute to meet the predetermined preparation requirement of alloy, at this moment should be according to predetermined prescription, the melting once more of some raw material of corresponding adding is till sampling analysis is qualified.For following embodiment above-mentioned requirement is arranged all.
Embodiment 2:
Magnesium ingot 1126kg, aluminium ingot 42kg, zinc ingot metal 12.0kg dropped into add flux 24kg fusing at the bottom of the RJ-2 in the off-the-shelf clean crucible, be sprinkled into RJ-5 insulating covering agent 4.8kg in the process to prevent burning, the whole melting process time is controlled at 5h, and magnesium liquid outlet temperature is controlled at 680 ℃; After fusing finished, blowing argon gas in magnesium liquid, and employing mechanical stirring added RJ-5 refining agent 24kg simultaneously and Manganous chloride tetrahydrate 9.65kg carries out refining, and the time is controlled at 45min, and temperature is controlled at 705 ℃; After refining finishes, add rare elemental cerium 12kg of going up and Preparation of Metallic Strontium 3.6kg when liquid magnesium alloy is controlled at 710 ℃, the time is controlled at 10min, and temperature is controlled at 710 ℃; Leave standstill cooling after the end, make flux and inclusion sedimentation, the time is controlled at 30min, and temperature is controlled at 670 ℃; At last under 670 ℃ of temperature condition, and pour into a mould in protective atmosphere, protective atmosphere is generally SO
2Protective atmosphere is cast down.The weight percent of the chemical composition of the magnesium alloy that makes like this is Al:3.5%; Mn:0.35%, Zn:1.0%; Ce:1.0%, Sr:0.3%, Si: Fe≤0.05%: Cu≤0.004%: Ni≤0.01% :≤0.002%, surplus is Mg.
Embodiment 3:
Magnesium ingot 1124.5kg, aluminium ingot 54kg, zinc ingot metal 7.2kg dropped into add flux 30kg fusing at the bottom of the RJ-2 in the off-the-shelf clean crucible, be sprinkled into RJ-5 insulating covering agent 6.0kg in the process to prevent burning, the whole melting process time is controlled at 6h, and magnesium liquid outlet temperature is controlled at 690 ℃; After fusing finished, blowing argon gas in magnesium liquid, and employing mechanical stirring added RJ-4 refining agent 18kg simultaneously and Manganous chloride tetrahydrate 5.50kg carries out refining, and the time is controlled at 45min, and temperature is controlled at 720 ℃; After refining finishes, add rare-earth element cerium 6kg and Preparation of Metallic Strontium 6.0kg when liquid magnesium alloy is controlled at 720 ℃, the time is controlled at 10min, and temperature is controlled at 720 ℃; Leave standstill cooling after the end, make flux and inclusion sedimentation, the time is controlled at 30min, and temperature is controlled at 680 ℃; At last under 680 ℃ of temperature condition, and pour into a mould in protective atmosphere, protective atmosphere is generally N
2Protective atmosphere is cast down.The weight percent of the chemical composition of the magnesium alloy that makes like this is Al:4.5%; Mn:0.20%, Zn:0.6%; Ce:0.5%, Sr:0.5%, Si: Fe≤0.05%: Cu≤0.004%: Ni≤0.01% :≤0.002%, surplus is Mg.
Claims (4)
1, a kind of heat-resistant deforming magnesium alloy is characterized in that the weight percent of each component is: Al:2.5～4.5%; Mn:0.2～0.5%, Zn:0.6～1.4%; Ce:0.5～1.5%, Sr:0.01～0.5%, Si: Fe≤0.05%: Cu≤0.004%: Ni≤0.01% :≤0.002%, surplus is Mg.
2, heat-resistant deforming magnesium alloy as claimed in claim 1 is characterized in that the weight percent of each component is: Al:2.5%; Mn:0.5%, Zn:1.4%; Ce:1.5%, Sr:0.1%, Si: Fe≤0.05%: Cu≤0.004%: Ni≤0.01% :≤0.002%, surplus is Mg.
3, heat-resistant deforming magnesium alloy as claimed in claim 1 is characterized in that the weight percent of each component is: Al:3.5%; Mn:0.35%, Zn:1.0%; Ce:1.0%, Sr:0.3%, Si: Fe≤0.05%: Cu≤0.004%: Ni≤0.01% :≤0.002%, surplus is Mg.
4, heat-resistant deforming magnesium alloy as claimed in claim 1 is characterized in that the weight percent of each component is: Al:4.5%; Mn:0.20%, Zn:0.6%; Ce:0.5%, Sr:0.5%, Si: Fe≤0.05%: Cu≤0.004%: Ni≤0.01% :≤0.002%, surplus is Mg.
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|---|---|---|---|
| CNB2007100246374A CN100457944C (en) | 2007-06-26 | 2007-06-26 | Thermal deformation resistant magnesium alloy |
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|---|---|---|---|
| CNB2007100246374A CN100457944C (en) | 2007-06-26 | 2007-06-26 | Thermal deformation resistant magnesium alloy |
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| CN100457944C true CN100457944C (en) | 2009-02-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215661B (en) * | 2008-01-07 | 2011-05-25 | 吉林大学 | Tough easy-deforming magnesium alloy |
| CN101805866B (en) * | 2010-04-21 | 2011-06-29 | 上海交通大学 | Wrought magnesium alloy for high-speed extrusion and preparation method thereof |
| 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 |
| DE112018003219T5 (en) * | 2017-06-22 | 2020-04-02 | Sumitomo Electric Industries, Ltd. | Magnesium alloy sheet |
Citations (3)
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|---|---|---|---|---|
| CN1609249A (en) * | 2004-09-17 | 2005-04-27 | 中国科学院上海微系统与信息技术研究所 | High corrosion resistant casting magnesium aluminium alloy and producing process thereof |
| CN1203203C (en) * | 2003-01-08 | 2005-05-25 | 华南理工大学 | Magnesium-aluminium-zinc alloy containing rare earth and its preparing method |
| WO2005108634A1 (en) * | 2004-05-10 | 2005-11-17 | Norsk Hydro Technology B.V. | Magnesium alloy having improved elevated temperature performance |
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2007
- 2007-06-26 CN CNB2007100246374A patent/CN100457944C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1203203C (en) * | 2003-01-08 | 2005-05-25 | 华南理工大学 | Magnesium-aluminium-zinc alloy containing rare earth and its preparing method |
| WO2005108634A1 (en) * | 2004-05-10 | 2005-11-17 | Norsk Hydro Technology B.V. | Magnesium alloy having improved elevated temperature performance |
| CN1609249A (en) * | 2004-09-17 | 2005-04-27 | 中国科学院上海微系统与信息技术研究所 | High corrosion resistant casting magnesium aluminium alloy and producing process thereof |
Non-Patent Citations (6)
| Title |
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| AZ31变形镁合金的研究与开发. 谢春晓，陈丙璇，刘凯.金属世界，第2期. 2006 |
| AZ31变形镁合金的研究与开发. 谢春晓，陈丙璇，刘凯.金属世界，第2期. 2006 * |
| Sr对Mg-3Al-1Zn镁合金铸态组织的影响. 杨明波，潘复生，李忠盛，程仁菊.重庆工学院学报（自然科学版），第21卷第3期. 2007 |
| Sr对Mg-3Al-1Zn镁合金铸态组织的影响. 杨明波，潘复生，李忠盛，程仁菊.重庆工学院学报（自然科学版），第21卷第3期. 2007 * |
| 锶在镁及其合金中的作用. 王慧源，刘生发，徐萍，黄尚宇.铸造，第54卷第11期. 2005 |
| 锶在镁及其合金中的作用. 王慧源，刘生发，徐萍，黄尚宇.铸造，第54卷第11期. 2005 * |
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Owner name: WUTAI YUNHAI MAGNESIUM INDUSTRY CO., LTD. Free format text: FORMER OWNER: NANJING YUNHAI SPECIAL METALS CO., LTD. Effective date: 20120314 |
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Effective date of registration: 20120314 Address after: 035500 industrial parks, five counties, Shanxi, Xinzhou Patentee after: Wutai Yunhai Magnesium Industry Co., Ltd. Address before: Lishui County, Nanjing City, Jiangsu province 211221 Honglan town Pu Village Patentee before: Nanjing Yunhai Special Metals Co., Ltd. |