CN100999799A - Magnesium alloy - Google Patents

Magnesium alloy Download PDF

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Publication number
CN100999799A
CN100999799A CN 200710078107 CN200710078107A CN100999799A CN 100999799 A CN100999799 A CN 100999799A CN 200710078107 CN200710078107 CN 200710078107 CN 200710078107 A CN200710078107 A CN 200710078107A CN 100999799 A CN100999799 A CN 100999799A
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China
Prior art keywords
magnesium alloy
mishmetal
rich
alloy
present
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CN 200710078107
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龙思远
廖慧敏
朱志兵
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Chongqing University
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Chongqing University
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Abstract

The present invention is one kind of magnesium alloy with high strength, high toughness and high heat resistance and for casting structural part of automobile and motorcycle. The magnesium alloy includes Al 6.50-8.70 wt%, Zn 0.41-1.20 wt%, Mn 0.10-1.0 wt%, mixed Ce-rice RE 0.50-4.00 wt%, impurity element Be not more than 0.10 wt%, Cu not more than 0.030 wt%, Ni not more than 0.002 wt%, Fe not more than 0.005 wt%, Si not more than 0.005 wt%, and Mg for the rest. Compared with traditional cast magnesium alloy, the present invention has compact structure, high strength, high toughness, high heat resistance and capacity of meeting the requirement of structural part in safety performance.

Description

A kind of magnesium alloy
Technical field
The present invention relates to a kind of magnesium alloy, be specifically related to a kind of high tough, heat-stable casting magnesium alloy, be used for the structural part of automobile, motorcycle.
Background technology
Magnesium has that light specific gravity, specific tenacity and specific rigidity height, damping and amortization and machinability are good, thermal conductivity is good, the electromagnetic shielding ability is strong and vibration damping is good and be easy to a series of advantage such as recovery.Become the preferred material of Hyundai Motor, motorcycle and 3C industry.But also exist at present technological difficulties to be solved are arranged in a large number, restricting the further application of cast magnesium alloys parts on automobile, motorcycle industry, mainly show as the thermotolerance of existing cast magnesium alloys AZ91D, AM60B, the requirement that obdurability can't satisfy automobile, motorcycle industry, and the casting forming process poor performance also can not get sizable application in automobile, motorcycle safety performance structure spare and the power drive system of tool loss of weight, energy-saving potential.Therefore, developing low-cost, high performance magnesium alloy become and expand magnesium alloy key in application on automotive industry.
By literature search, it is the most approaching to obtain following document and the present invention:
Document 1: " low heat cracking tendency encloses molten reinforcement cast Mg alloy with high strength " granted patent number: ZL01139042.5 relates to the low heat cracking tendency solution strengthening high-strength magnesium alloy of a kind of Mg-Al-Re low-pressure casting, sand mold casting.
Document 2: " high toughness thermal-resistant magnesium alloy and melting technology thereof " application number: 200510038359.9, relate to the high toughness thermal-resistant magnesium alloy that a kind of Mg-Al-Re casts usefulness.
Document 3: " diecast magnesium alloy of high workability and preparation method " application number: 200610025394.1, relate to a kind of Mg-Al-Re alloy of high workability.
From top and other pertinent literature, recognize: at present, the research of magnesium alloy materials mainly is to improve the obdurability and the resistance toheat of alloy.Main all is by adding trace element to grain refining in the Mg-Al series alloy and solution strengthening, improving the intensity of magnesium alloy and the purpose of plasticity and resistance toheat.
According to the alloying constituent in the above-mentioned patent documentation 1 is (by weight percentage): Al 7.5~9.5%, Zn 0~0.40%, rare earth Re (rich Ce mishmetal) 0.25~1.6%, Mn 0.05~0.5%, Be 0.001~0.005%, impurity element Si≤0.02%, Fe≤0.015%, Ni≤0.002%, all the other are Mg.After low-pressure casting, sand mold casting, again by solid solution and ageing treatment.The at first content difference of Zn, and preparation shaping technical field is also inequality.
According to the alloying constituent in the above-mentioned patent documentation 2 is (by weight percentage): 2~4%Al, 0.8~2.0%Re, and 0.1~0.4%Mn, 0.3~1.5%Sb, 0.001~0.003%Be, all the other are Mg.There is not Sb in the Al content difference of alloy in the alloy of the present invention in addition.
According to the alloying constituent in the above-mentioned patent documentation 2 is (by weight percentage): Al 9.0-10.5%, Ca 0.1-2.0%, Sr0.1-2.0%, Ce 0.1-1.0%, La 0.05-0.5%, Nd 0.02-0.5%, Zn 0.2-1.0%, Mn 0.2-0.4%, impurity≤0.2%, surplus is Mg.Be applicable to a kind of in heavy casting of die-cast, semi-solid state shape casting, sand mold or metal mold or the low-pressure casting.Different with Al content range of the present invention, do not contain Ca, Sr in addition among the present invention.
Yet there are no the magnesium alloy of Mg-Al-RE-Zn of the present invention.The used rich Ce mishmetal of the present invention is the commercially available prod.
Summary of the invention:
The objective of the invention is at above-mentioned the deficiencies in the prior art, and a kind of magnesium alloy is provided, this magnesium alloy has dense structure, high-strong toughness and resistance toheat, and casting forming process is good, satisfies the requirement of member to safety performance.
In order to realize the foregoing invention purpose, technical scheme of the present invention is:
A kind of magnesium alloy, comprise following component and weight percent: Al 6.50~8.70%, Zn 0.41~1.20%, and Mn 0.10~1.0%, rich Ce mishmetal 0.50~4.00%, impurity element Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
The preparation technology of this magnesium alloy step in the following order carries out:
Magnesium, aluminium, zinc, manganese are prepared burden by weight percentage, batching is placed crucible, be heated to 400~420 ℃, in crucible, feed SF 6/ N 2Mixed gas, continuation will be prepared burden after the heat fused, and temperature rises to 690~710 ℃, and rich Ce mishmetal is added in the crucible, stir and temperature is risen to 720~740 ℃, and insulation was left standstill 20~30 minutes, reduced to 675~685 ℃; Carry out Hpdc or extrusion casting, the depanning cooling.
The unusual effect of alloy of the present invention is the adding by rich Ce mishmetal, and the Mg-Al alloy is played grain refining and solution strengthening effect, thereby improves the strong plasticity of magnesium alloy; The cenotype Al that in alloy, forms in addition 11MM 3Have grain-boundary strengthening and dispersion-strengthened action, improved high-temperature stable and thermotolerance.
Magnesium alloy provided by the present invention is compared than conventional cast alloy A Z91D, AM60B, not only has good extrusion process performance, have more superior comprehensive mechanical property and resistance toheat, and the highest 10% of traditional cast magnesium alloy AZ91D, the AM60B that be no more than of cost.
Description of drawings:
Fig. 1-the 1st is with the figure of as-cast metallographic structure with AZ91D under the condition of the present invention.
Fig. 1-2 is the figure of as-cast metallographic structure of the specific embodiment of the present invention 3.
Fig. 2 is with AZ91D under the condition and embodiment 3 mechanical property contrast tables with of the present invention.
Fig. 3 is with AZ91D under the condition and embodiment 3 creep curve comparison diagram under 150 ℃, 50MPa with of the present invention.
Embodiment:
Example 1, a kind of magnesium alloy, its component and weight percent are: Al 6.50%, and 2n 1.20%, Mn 0.10%, rich Ce mishmetal 0.50%, impurity element Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
Its preparation technology of the magnesium alloy of this example step in the following order carries out: magnesium, aluminium, zinc, manganese are respectively prepared burden by above-mentioned prescription, place crucible to heat, when being heated to 400 ℃, feed SF in crucible 6/ N 2Mixed gas, be heated fusing after, temperature is elevated to 700 ℃; By prescription is disposable rich Ce mishmetal is added in the crucible, stir and furnace temperature is risen to 740 ℃, insulation was left standstill 30 minutes, reduced to 680 ℃, carried out Hpdc, and the depanning cooling obtains Mg alloy castings of the present invention.
Magnesium alloy room temperature tensile strength, yield strength and the unit elongation of this example are respectively 250MPa, 156MPa, 10.38%; 150 ℃ tensile strength, yield strength and unit elongation are respectively 160MPa, 124MPa, 12%; Under the tensile stress of 50MPa, 120 hours dependent variable is 0.83% under 150 ℃.
Example 2, a kind of magnesium alloy, its component and weight percent are: Al 7.50%, and Zn 0.90%, Mn 0.20%, rich Ce mishmetal 1.00%, impurity element Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
Its preparation technology of the magnesium alloy of this example step in the following order carries out: magnesium, aluminium, zinc, manganese are respectively prepared burden by above-mentioned prescription, place crucible to heat, when being heated to 420 ℃, feed SF in crucible 6/ N 2Mixed gas, be heated fusing after, temperature is elevated to 720 ℃, by prescription is disposable rich Ce mishmetal is added in the crucible, stir and furnace temperature risen to 740 ℃, insulation was left standstill 30 minutes, reduced to 680 ℃; Carry out Hpdc, obtain Mg alloy castings of the present invention.
Magnesium alloy room temperature tensile strength, yield strength and the unit elongation of this example are respectively 253MPa, 160MPa, 10.72%; 150 ℃ tensile strength, yield strength and unit elongation are respectively 163MPa, 126MPa, 16%; Under the tensile stress of 50MPa, 120 hours dependent variable is 0.68% under 150 ℃.
Example 3, a kind of magnesium alloy, its component and weight percent are: Al 8.03%, Zn0.70%, Mn0.25%, rich Ce mishmetal 1.50%, impurity element Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
Its preparation technology of the magnesium alloy of this example is with example 2.
Magnesium alloy room temperature tensile strength, yield strength and the unit elongation of this example are respectively 273MPa, 167MPa, 12.36%; 150 ℃ tensile strength, yield strength and unit elongation are respectively 168MPa, 138MPa, 18%; Under the tensile stress of 50MPa, 120 hours dependent variable is 0.56% under 150 ℃.
Example 4, a kind of magnesium alloy, its component and weight percent are: Al 8.42%, and Zn 0.50%, Mn 0.40%, rich Ce mishmetal 2.00%, impurity element Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
Its preparation technology of the magnesium alloy of this example is with example 2.
Magnesium alloy room temperature tensile strength, yield strength and the unit elongation of this example are respectively 263MPa, 170MPa, 9.02%; 150 ℃ tensile strength, yield strength and unit elongation are respectively 154MPa, 134MPa, 17%; Under the tensile stress of 50MPa, 120 hours dependent variable is 0.37% under 150 ℃.
Example 5, a kind of magnesium alloy, its component and weight percent are: Al 8.53%, and Zn 0.54%, Mn 0.60%, rich Ce mishmetal 3.00%, impurity element Be≤0.01%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
Its preparation technology of the magnesium alloy of this example is with example 2.
Magnesium alloy room temperature tensile strength, yield strength and the unit elongation of this example are respectively 258MPa, 172MPa, 8.61%; 150 ℃ tensile strength, yield strength and unit elongation are respectively 153MPa, 130MPa, 15%; Under the tensile stress of 50MPa, 120 hours dependent variable is 0.25% under 150 ℃.
Example 6, a kind of magnesium alloy, its component and weight percent are: Al 8.70%, and Zn 0.41%, Mn 1.00%, rich Ce mishmetal 4.00%, impurity element Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
Its preparation technology of the magnesium alloy of this example is with example 2.
Magnesium alloy room temperature tensile strength, yield strength and the unit elongation of this example are respectively 237MPa, 153MPa, 7.89%; 150 ℃ tensile strength, yield strength and unit elongation are respectively 141MPa, 124MPa, 16%; Under the tensile stress of 50MPa, 120 hours dependent variable is 0.21% under 150 ℃.

Claims (7)

1. magnesium alloy is characterized in that this magnesium alloy comprises following component and weight percent:
Al 6.50~8.70%, and Zn 0.41~1.20%, and Mn 0.10~1.0%, rich Ce mishmetal 0.50~4.00%, and impurity element Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
2. according to right 1 described magnesium alloy, it is characterized in that component and weight percent that this magnesium alloy is concrete are as follows:
Al 6.50%, and Zn 1.20%, and Mn 0.10%, rich Ce mishmetal 0.50%, and Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
3. according to right 1 described magnesium alloy, it is characterized in that component and weight percent that this magnesium alloy is concrete are as follows:
Al 7.50%, and Zn 0.90%, and Mn 0.20%, rich Ce mishmetal 1.00%, and Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
4. according to right 1 described magnesium alloy, it is characterized in that component and weight percent that this magnesium alloy is concrete are as follows:
Al 8.03%, and Zn 0.70%, and Mn 0.25%, rich Ce mishmetal 1.50%, and Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
5. according to right 1 described magnesium alloy, it is characterized in that component and weight percent that this magnesium alloy is concrete are as follows:
Al 8.42%, and Zn 0.50%, and Mn 0.40%, rich Ce mishmetal 2.00%, and Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
6. according to right 1 described magnesium alloy, it is characterized in that component and weight percent that this magnesium alloy is concrete are as follows:
Al 8.53%, and Zn 0.54%, and Mn 0.60%, rich Ce mishmetal 3.00%, and Be≤0.01%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
7. according to right 1 described magnesium alloy, it is characterized in that component and weight percent that this magnesium alloy is concrete are as follows:
Al 8.70%, and Zn 0.41%, and Mn 1.00%, rich Ce mishmetal 4.00%, and Be≤0.10%, Cu≤0.030%, Ni≤0.002%, Fe≤0.005%, Si≤0.005%, all the other are Mg.
CN 200710078107 2007-01-09 2007-01-09 Magnesium alloy Pending CN100999799A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101805865A (en) * 2010-04-09 2010-08-18 嘉兴中科亚美合金技术有限责任公司 High-strength magnesium alloy tube
CN101886199A (en) * 2010-06-28 2010-11-17 无锡市闽仙汽车电器有限公司 Magnesium alloy formula of starter housing
CN102994840A (en) * 2011-09-09 2013-03-27 武汉铁盟机电有限公司 MgAlZn heat resistance magnesium alloy
CN105624494A (en) * 2016-03-21 2016-06-01 扬州宏福铝业有限公司 Anti-corrosion wrought magnesium alloy containing rare earth elements and manufacturing method of anti-corrosion wrought magnesium alloy
CN107164675A (en) * 2017-05-27 2017-09-15 东北大学 A kind of magnalium zinc cerium alloy and its preparation method and application
CN107267827A (en) * 2017-05-26 2017-10-20 广西庆达汽车零部件有限公司 A kind of high-strength magnesium aluminium alloy
CN109207824A (en) * 2017-06-29 2019-01-15 比亚迪股份有限公司 A kind of magnesium alloy and preparation method thereof and mobile phone

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101805865A (en) * 2010-04-09 2010-08-18 嘉兴中科亚美合金技术有限责任公司 High-strength magnesium alloy tube
CN101886199A (en) * 2010-06-28 2010-11-17 无锡市闽仙汽车电器有限公司 Magnesium alloy formula of starter housing
CN101886199B (en) * 2010-06-28 2012-04-11 无锡市闽仙汽车电器有限公司 Magnesium alloy formula of starter housing
CN102994840A (en) * 2011-09-09 2013-03-27 武汉铁盟机电有限公司 MgAlZn heat resistance magnesium alloy
CN102994840B (en) * 2011-09-09 2015-04-29 武汉铁盟机电有限公司 MgAlZn heat resistance magnesium alloy
CN105624494A (en) * 2016-03-21 2016-06-01 扬州宏福铝业有限公司 Anti-corrosion wrought magnesium alloy containing rare earth elements and manufacturing method of anti-corrosion wrought magnesium alloy
CN107267827A (en) * 2017-05-26 2017-10-20 广西庆达汽车零部件有限公司 A kind of high-strength magnesium aluminium alloy
CN107267827B (en) * 2017-05-26 2018-12-28 广西庆达汽车零部件有限公司 A kind of high-strength magnesium aluminium alloy
CN107164675A (en) * 2017-05-27 2017-09-15 东北大学 A kind of magnalium zinc cerium alloy and its preparation method and application
CN107164675B (en) * 2017-05-27 2019-02-22 东北大学 A kind of magnalium zinc cerium alloy and its preparation method and application
CN109207824A (en) * 2017-06-29 2019-01-15 比亚迪股份有限公司 A kind of magnesium alloy and preparation method thereof and mobile phone

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