CN104630584A - Magnesium alloy for high-fluidity high-strength ultrathin-wall component and preparation method of magnesium alloy - Google Patents
Magnesium alloy for high-fluidity high-strength ultrathin-wall component and preparation method of magnesium alloy Download PDFInfo
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- CN104630584A CN104630584A CN201510053638.6A CN201510053638A CN104630584A CN 104630584 A CN104630584 A CN 104630584A CN 201510053638 A CN201510053638 A CN 201510053638A CN 104630584 A CN104630584 A CN 104630584A
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- magnesium alloy
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
Abstract
The invention relates to a magnesium alloy technology, particularly relates to magnesium alloy for a high-fluidity high-strength ultrathin-wall component and a preparation method of the magnesium alloy, and aims to solve the problems that the performances are poor and the finished product rate is influenced when AZ91 magnesium alloy is used for manufacturing a thin-wall component. The magnesium alloy for the high-fluidity high-strength ultrathin-wall component is prepared from the following raw materials in percentage by mass: 9-11 percent of Al, 0.3-0.9 percent of Zn, 0.15-0.50 percent of Mn, 0.1-0.8 percent of Sb, 0.2-1.0 percent of rare-earth elements and the balance of Mg and impurities. By improvement of the prescription of the magnesium alloy, the performances of the high-fluidity high-strength ultrathin-wall component are effectively improved; the tensile strength is as high as 300MPa to 310MPa; the yield strength is as high as 200MPa to 210MPa; the fluidity is also remarkably improved; relatively high pressure casting cost rate is guaranteed; the magnesium alloy has the advantages of simple process, convenient operation and low cost.
Description
Technical field
The present invention relates to magnesium alloy technology, be specially a kind of high workability, high strength slim wall components magnesium alloy and preparation method thereof.
Background technology
After the alloyings such as magnesium and some metallic element aluminium, zinc, manganese, rare earth, zirconium, silver, the alloy of the high-strength light obtained can be used as structured material, and these alloying elements improve the performance of material mainly through solution strengthening and crystal grain thinning.
Magnesium-aluminum alloys be the current trade mark maximum, most widely used magnesium alloy series.Compared with wrought magnesium alloys, cast magnesium alloys application is particularly extensive, and particularly die casting, accounts for more than 70-80%, and wherein AZ91 Alloyapplication is the most extensive, due to the mobility of its excellence, and can the thin wall component of die casting complex construction.At room temperature the solid solubility of aluminium is 2 mass.%, 437 DEG C time, rise to 12.7 mass.%.Aluminium content is greater than 2 mass.%, can form β (Mg near as-cast magnesium alloy crystal boundary
17al
12).Along with the increase of aluminium content, β phase forms network at grain boundaries, but aluminium content is more than 10mass.%, and ductility and the mechanical property of magnesium alloy sharply decline, and affect the yield rate of thin wall component.
Summary of the invention
There is to solve when AZ91 magnesium alloy makes thin wall component the problem that poor-performing affects yield rate in the present invention, provides a kind of high workability, high strength slim wall components magnesium alloy and preparation method thereof.
The present invention adopts following technical scheme to realize: high workability, high strength slim wall components magnesium alloy, be made up of the raw material of following mass percent: aluminium 9-11%, zinc 0.3-0.9%, manganese 0.15-0.50%, antimony 0.1-0.8%, rare earth element 0.2-1.0%, surplus is magnesium and impurity.
The content of aluminium, zinc, manganese, antimony and rare earth element and ratio are each other chosen, and are through that a large amount of repetition tests draws, choosing of aluminium content improves alloy strength and hardness, also can widen solidification zone, increases the mobility of alloy, improves castability; The choosing to be combined with aluminium of Zn content can put forward heavy alloyed room temperature strength, has solution strengthening and ageing strengthening dual function, can alleviate the corrosive nature because iron, nickel exist and causes simultaneously; Choosing of Fe content can improve yield strength a little, and by avoiding except de-iron and other heavy metal elements generating the anti-seawater corrosion ability that harmful intergranular compound improves magnalium, the intermetallic compound that part is harmful in fusion process can be separated, crystal grain thinning simultaneously, improves weldability; Rare earth element both can improve magnesium alloy recrystallization temperature and slow down recrystallization process, can separate out again highly stable disperse phase ion, thus can increase substantially the intensity of magnesium alloy; After antimony adds, with Mg
3sb
2form separate out, can be used as α-Mg matrix non-spontaneous forming core particle crystal grain thinning, obviously improve the mechanical properties such as the room temperature tensile intensity of magnesium alloy, overcome AZ91 magnesium alloy make thin wall component time there is the poor problem affecting yield rate of intensity.
The mixed rare-earth elements that rare earth element is made up of cerium, lanthanum, praseodymium, neodymium four kinds of metallic elements, and the mass percent of cerium metal element shared by mixed rare-earth elements is more than or equal to 55%.
Mixed rare-earth elements and magnesium alloy Tc interval little, define simple eutectic system and low-melting-point eutectic, thus there is good mobility, the mobility of alloy increases, loose hot cracking tendency reduces, increase the compactness of alloy; Be rich in simultaneously and make to there will be in bar-shaped Al in high purity alumina-magnesia magnesium alloy adding of the mixed rare-earth elements of cerium
11rE
3precipitated phase, and Mg
17al
12reduce gradually mutually and refinement, significantly improve magnesium alloy strength.
The preparation method of high workability, high strength slim wall components magnesium alloy, adopts following steps: a, by magnesium ingot melting in iron ware; B, be heated to 650-750 DEG C subsequently, add aluminium, zinc, manganese, antimony metal and rare earth element successively at this temperature; C, magnesium alloy fused mass is controlled at 700-750 DEG C, leave standstill after stirring with argon gas; D, finally magnesium alloy fused mass temperature is down to 670-690 DEG C, carries out the casting of magnesium alloy ingot.
The present invention is by the improvement to magnesium alloy formula, effectively improve its performance, tensile strength reaches 300-310MPa, yield strength reaches 200-210MPa, flowing property have also been obtained significant lifting, ensure that higher die casting cost rate, there is simple, the easy to operate and advantage that cost is low of technique.
Embodiment
embodiment 1
High workability, high strength slim wall components magnesium alloy, be made up of the raw material of following mass percent: aluminium 9%, zinc 0.3%, manganese 0.15%, antimony 0.1-0.8%, rare earth element 0.2%, and surplus is magnesium and impurity.
The mixed rare-earth elements that rare earth element is made up of cerium, lanthanum, praseodymium, neodymium four kinds of metallic elements, and the mass percent of cerium metal element shared by mixed rare-earth elements is 55%.
The preparation method of high workability, high strength slim wall components magnesium alloy, adopts following steps: a, by magnesium ingot melting in iron ware; B, be heated to 650 DEG C subsequently, add aluminium, zinc, manganese, antimony metal and rare earth element successively at this temperature; C, magnesium alloy fused mass is controlled at 700 DEG C, leave standstill after stirring with argon gas; D, finally magnesium alloy fused mass temperature is down to 670 DEG C, carries out the casting of magnesium alloy ingot.
After measured, tensile strength is 300MPa to the mechanical property of this magnesium alloy, and yield strength is 200MPa.
embodiment 2
High workability, high strength slim wall components magnesium alloy, be made up of the raw material of following mass percent: aluminium 11%, zinc 0.9%, manganese 0.50%, antimony 0.1-0.8%, rare earth element 1.0%, and surplus is magnesium and impurity.
The mixed rare-earth elements that rare earth element is made up of cerium, lanthanum, praseodymium, neodymium four kinds of metallic elements, and the mass percent 78% that cerium metal element is shared in mixed rare-earth elements.
The preparation method of high workability, high strength slim wall components magnesium alloy, adopts following steps: a, by magnesium ingot melting in iron ware; B, be heated to 750 DEG C subsequently, add aluminium, zinc, manganese, antimony metal and rare earth element successively at this temperature; C, magnesium alloy fused mass is controlled at 750 DEG C, leave standstill after stirring with argon gas; D, finally magnesium alloy fused mass temperature is down to 690 DEG C, carries out the casting of magnesium alloy ingot.
After measured, tensile strength is 310MPa to the mechanical property of this magnesium alloy, and yield strength is 210MPa.
embodiment 3
High workability, high strength slim wall components magnesium alloy, be made up of the raw material of following mass percent: aluminium 10.3%, zinc 0.7%, manganese 0.37%, antimony 0.1-0.8%, rare earth element 0.5%, and surplus is magnesium and impurity.
The mixed rare-earth elements that rare earth element is made up of cerium, lanthanum, praseodymium, neodymium four kinds of metallic elements, and the mass percent of cerium metal element shared by mixed rare-earth elements is more than or equal to 64%.
The preparation method of high workability, high strength slim wall components magnesium alloy, adopts following steps: a, by magnesium ingot melting in iron ware; B, be heated to 718 DEG C subsequently, add aluminium, zinc, manganese, antimony metal and rare earth element successively at this temperature; C, magnesium alloy fused mass is controlled at 749 DEG C, leave standstill after stirring with argon gas; D, finally magnesium alloy fused mass temperature is down to 673 DEG C, carries out the casting of magnesium alloy ingot.
After measured, tensile strength is 303MPa to the mechanical property of this magnesium alloy, and yield strength is 205MPa.
In specific implementation process, aluminium, zinc, manganese add with the metal of purity >=99.0%, and magnesium alloy fused mass controls, when 700-750 DEG C, to add refining agent, stirs 30 minutes with argon gas, leave standstill 40 minutes more afterwards; Rare earth element adds with the form of the rare earth intermediate alloy of alloy containing mixed rare earth element 30%.
When antimony content rises to 0.7% from 0, tensile strength and the yield strength of alloy significantly improve, and its plasticity declines to some extent; After Sb content is more than 0.7, intensity no longer rises, and plasticity declines to some extent.At high temperature, antimony does not disappear because of the rising of temperature to the strengthening effect of AZ91 alloy.When 150 DEG C, when antimony content from above freezing be raised to 0.4wt% time, yield strength is significantly improved, and increase rate reaches 34%, and unit elongation slightly declines.When antimony content increases further, yield strength decreases on the contrary, and unit elongation reduction amplitude obviously increases simultaneously.Under high temperature, the tensile strength of alloy is improved very unobvious.
Claims (3)
1. high workability, a high strength slim wall components magnesium alloy, is characterized in that: be made up of the raw material of following mass percent: aluminium 9-11%, zinc 0.3-0.9%, manganese 0.15-0.50%, antimony 0.1-0.8%, rare earth element 0.2-1.0%, surplus is magnesium and impurity.
2. high workability according to claim 1, high strength slim wall components magnesium alloy, it is characterized in that: the mixed rare-earth elements that rare earth element is made up of cerium, lanthanum, praseodymium, neodymium four kinds of metallic elements, and the mass percent of cerium metal element shared by mixed rare-earth elements is more than or equal to 55%.
3. the preparation method of high workability according to claim 1 and 2, high strength slim wall components magnesium alloy, is characterized in that: adopt following steps: a, by magnesium ingot melting in iron ware; B, be heated to 650-750 DEG C subsequently, add aluminium, zinc, manganese, antimony metal and rare earth element successively at this temperature; C, magnesium alloy fused mass is controlled at 700-750 DEG C, leave standstill after stirring with argon gas; D, finally magnesium alloy fused mass temperature is down to 670-690 DEG C, carries out the casting of magnesium alloy ingot.
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| CN201510053638.6A CN104630584A (en) | 2015-02-03 | 2015-02-03 | Magnesium alloy for high-fluidity high-strength ultrathin-wall component and preparation method of magnesium alloy |
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| CN201510053638.6A CN104630584A (en) | 2015-02-03 | 2015-02-03 | Magnesium alloy for high-fluidity high-strength ultrathin-wall component and preparation method of magnesium alloy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893182A (en) * | 2017-11-07 | 2018-04-10 | 广西小草信息产业有限责任公司 | A kind of resistant to elevated temperatures magnesium alloy new material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0665299B1 (en) * | 1993-12-17 | 2000-03-08 | Mazda Motor Corporation | Magnesium alloy cast material for plastic processing, magnesium alloy member using the same, and manufacturing method thereof |
| CN1699612A (en) * | 2004-05-19 | 2005-11-23 | 中国科学院金属研究所 | High strength and high toughness cast magnesium alloy and preparing process thereof |
| CN101220433A (en) * | 2008-01-14 | 2008-07-16 | 苏州云海镁业有限公司 | High-alumina magnesium alloy |
| CN103643097A (en) * | 2013-11-25 | 2014-03-19 | 简玉君 | Rare earth and magnesium alloy |
-
2015
- 2015-02-03 CN CN201510053638.6A patent/CN104630584A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0665299B1 (en) * | 1993-12-17 | 2000-03-08 | Mazda Motor Corporation | Magnesium alloy cast material for plastic processing, magnesium alloy member using the same, and manufacturing method thereof |
| CN1699612A (en) * | 2004-05-19 | 2005-11-23 | 中国科学院金属研究所 | High strength and high toughness cast magnesium alloy and preparing process thereof |
| CN101220433A (en) * | 2008-01-14 | 2008-07-16 | 苏州云海镁业有限公司 | High-alumina magnesium alloy |
| CN103643097A (en) * | 2013-11-25 | 2014-03-19 | 简玉君 | Rare earth and magnesium alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893182A (en) * | 2017-11-07 | 2018-04-10 | 广西小草信息产业有限责任公司 | A kind of resistant to elevated temperatures magnesium alloy new material and preparation method thereof |
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Address after: 043800 Shanxi city of Yuncheng Province Wang Pei township of Wenxi county. Applicant after: Shanxi Reggae Metal New Material Co Ltd Address before: 043800 Shanxi city of Yuncheng Province Wang Pei township of Wenxi county. Applicant before: Wenxi County Regal Magnesium Co., Ltd. |
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Application publication date: 20150520 |
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