CN102242299A - Bi and Nd composite reinforced high-strength cast magnesium alloy and preparation method thereof - Google Patents
Bi and Nd composite reinforced high-strength cast magnesium alloy and preparation method thereof Download PDFInfo
- Publication number
- CN102242299A CN102242299A CN 201110210785 CN201110210785A CN102242299A CN 102242299 A CN102242299 A CN 102242299A CN 201110210785 CN201110210785 CN 201110210785 CN 201110210785 A CN201110210785 A CN 201110210785A CN 102242299 A CN102242299 A CN 102242299A
- Authority
- CN
- China
- Prior art keywords
- alloy
- strength
- pure
- cast magnesium
- cast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention relates to the field of metal material magnesium alloys, in particular to a Bi and Nd composite reinforced high-strength cast magnesium alloy. The alloy comprises the following components in percentage by parts: 3.0-10.0% of Al, 0.01-1.0% of Zn, 0.01-1.0% of Mn, 0.01-3.0% of Bi, 0.01-3.0% of Nd, less than 0.005% of impurity Fe, less than 0.015% of Cu, less than 0.002% of Ni and the balance of Mg. Mg3Bi2, Al2Nd and Al11Nd3 composite reinforced magnesium alloys are simultaneously prepared by adding Bi and Nd, and a Mg-Al-Zn-Mn-Bi-Nd alloy with excellent performances of a cast state and a thermal treatment state is obtained in a separation reinforcement and fine grain reinforcement manner. The Bi and Nd composite reinforced high-strength cast magnesium alloy disclosed by the invention has better yield strength and tensile strength compared with a traditional AZ-system magnesium alloy under the cast state and a T6 state. Taking Mg-8Al-0.5Zn-0.2Mn-0.6Bi-0.8Nd for example, the yield strength rho 0.2 reaches 128MPa at the cast state, and the tensile strength rhob reaches 215MPa. Compared with the AZ 80 alloy under the same condition, the Bi and Nd composite reinforced high-strength cast magnesium alloy disclosed by the invention has the yield strength increased by 32% and the tensile strength increased by 10%. The yield strength rho 0.2 of the alloy reaches 141MPa and the tensile strength rhob thereof reaches 225MPa at the T6 state. Compared with the AZ 80 alloy under the same condition, the Bi and Nd composite reinforced high-strength cast magnesium alloy disclosed by the invention has the yield strength increased by16% and the tensile strength increased a little.
Description
Technical field
The present invention relates to metallic substance magnesium alloy field, be specially the high-strength cast magnesium alloys of a kind of Bi and Nd complex intensifying, it is the magnesium alloy of a kind of Al of containing, Zn, Mn, Bi and Nd.
Background technology
Modern industry has proposed lightweight and the high requirement of strengthening to product, magnesium alloy is little with its density, specific tenacity and specific rigidity height, electrical and thermal conductivity and electromagnetic wave shielding are good, and good advantages such as machinability, become Modern Industry Products ideal equivalent material gradually, the market requirement is steady growth trend always in recent years, obtains application more and more widely in fields such as automobile, electronic product and aerospace.
Traditional AZ series magnesium alloy becomes a most widely used class alloy at present as AZ31, AZ61, AZ80 and AZ91 etc. because cost is lower, castability is good, but still has some problems.AZ series magnesium alloy under the as cast condition is because crystal boundary and interdendritic are distributed with thick continuous net-shaped β-Mg
17Al
12Phase, this generation tiny crack that breaks easily mutually in the carry load process, crackle lost efficacy along the crystal boundary expansion, thereby worsened alloy property, caused alloy strength not high, had limited it in industrial application.Therefore, be meeting the market requirement, enlarge the Application of Magnesium scope, develop a kind of novel high-strength cast magnesium alloys, be present magnesium alloy field the important research direction it
Summary of the invention
For solving the existing low problem of AZ series magnesium alloy intensity, the object of the present invention is to provide the high-strength cast magnesium alloys of a kind of Bi and Nd complex intensifying, in the mode of refined crystalline strengthening and precipitation strength, improve the mechanical property of alloy, to enlarge the Application of Magnesium scope.
For achieving the above object, the present invention is achieved by the following technical solutions:
The high-strength cast magnesium alloys of a kind of Bi and Nd complex intensifying, each component of alloy and weight percent thereof are: 3.0～10.0%Al, 0.01～1.0%Zn, 0.01～1.0%Mn, 0.01～3.0%Bi, 0.01～3.0%Nd, impurity element Fe＜0.005%, Cu＜0.015%, Ni＜0.002%, all the other are Mg.
Wherein, Mn, Nd add with the form of Al-Mn, Mg-Nd master alloy, and Al, Zn, Bi add in the mode of pure Al, pure Zn, pure Bi.
The present invention, adds 0.01～3.0%Bi and 0.01～3.0%Nd simultaneously and comes refinement alloy grain size as basal component with 3.0～10.0%Al, the Mg in the rotten magnesium alloy
17Al
12Phase forms Mg simultaneously
3Bi
2, Al
2Nd and Al
11Nd
3Wild phase plays the effect of structure refinement and precipitation strength, thereby improves alloy strength.Adding 0.01～1.0%Zn is intensity and the castability in order to improve alloy, and adding 0.01～1.0%Mn is for improving the corrosion resistance of alloy.
The high-strength cast magnesium alloys of described Bi and Nd complex intensifying, each component of alloy and weight percent thereof are preferably: 5.0～9.0%Al, 0.1～0.8%Zn, 0.1～0.7%Mn, 0.1～2.0%Bi, 0.1～2.0%Nd, impurity element Fe, Cu, Ni total amount＜0.015%, all the other are Mg.
The founding of alloy of the present invention is as follows: fusion process carries out under gas shield; after the pure magnesium fusing; add pure Al, pure Zn, pure Bi, Al-Mn master alloy and Mg-Nd master alloy respectively; after treating that alloying element dissolves fully; adopt conventional refining agent of Mg alloy to carry out refining; cast behind the thermal insulation deslagging, castmethod can adopt pressure die casting, permanent mold casting or sand mold casting.
Heat treatment of alloy mode of the present invention is: solid solution+timeliness (T6), and earlier 400～450 ℃ of following solution treatment 16～20 hours, 50～80 ℃ of hot water are quenched to room temperature, and 150～250 ℃ of following timeliness 20～30 hours, air cooling was to room temperature then.
Advantage of the present invention and beneficial effect are as follows:
1. alloying is the basic and the most effective reinforcement approach in the practical application.Studies show that: the Bi element can play the performance that refined crystalline strengthening, precipitation strength etc. are used for improving magnesium alloy in magnesium alloy; Rare earth element nd can play the tissue of improved effect magnesium alloy such as purifying melt, crystal grain thinning, the thermally-stabilised phase enhanced particles of generation, improves its performance.If with the reinforcement stack of two kinds of alloying elements, then can more effectively improve the performance of magnesium alloy.Therefore, research and develop the high-strength magnesium alloy of a kind of Bi and Nd complex intensifying, expand Bi and the application of Nd element in magnesium alloy, have great importance.
2. compare the obvious refinement of alloy casting state undertissue of the present invention, β-Mg with existing magnesium alloy
17Al
12Distribute by continuous net-shaped becoming fully intermittently.With Mg-8Al-0.5Zn-0.2Mn-0.6Bi-0.8Nd is example, and grain-size is refined to 114 μ m, compares (as shown in Figure 1a) with the AZ80 of the same terms, the obvious refinement of crystal grain; By the mode of Bi and Nd complex intensifying, generate tiny strip or particulate state Mg
3Bi
2, Al
2Nd and Al
11Nd
3The phase disperse is distributed in the matrix.In the mode of precipitation strength and refined crystalline strengthening, obtained to have the alloy of good comprehensive mechanical property.
3. alloy of the present invention is under as cast condition and T6 attitude, and yield strength and tensile strength all are better than traditional AZ series magnesium alloy.With Mg-8Al-0.5Zn-0.2Mn-0.6Bi-0.8Nd is example, at as cast condition lower yield strength σ
0.2Reach 128MPa, tensile strength sigma
bReach 215MPa.With the AZ80 alloy phase ratio under the same terms, yield strength improves 32%, and tensile strength improves 10%.The yield strength σ of this alloy under the T6 attitude
0.2Reach 141MPa, tensile strength sigma
bReach 225MPa.With the AZ80 alloy phase ratio under the same terms, yield strength improves 16%, and tensile strength slightly improves.
Description of drawings
Fig. 1 is the grain size contrast of AZ80 and Mg-8Al-0.5Zn-0.2Mn-0.6Bi-0.8Nd alloy.Wherein (a) figure is the grain structure macrograph of AZ80 alloy, and (b) figure is the grain structure macrograph of Mg-8Al-0.5Zn-0.2Mn-0.6Bi-0.8Nd alloy.
Fig. 2 is the as-cast microstructure of Mg-8Al-0.5Zn-0.2Mn-0.6Bi-0.8Nd alloy.
Embodiment
Embodiment 1
In the present embodiment, alloying constituent (weight percent) is: 8.0%Al, 0.5%Zn, 0.2%Mn, 0.6%Bi, 0.8%Nd, impurity element Fe0.003%, Cu0.008%, Ni0.001%, all the other are Mg.
(1) earlier with pure Mg, pure Al 200 ℃ of preheatings, with pure Bi, Mg-Nd and Al-Mn master alloy 100 ℃ of preheatings, and oven dry; Simultaneously, with the refining agent of Mg alloy RJ-2 of routine and mould 250 ℃ of preheatings.
(2) crucible is heated to 730 ℃ in resistance furnace, then with pure Mg at CO
2With SF
6Mixed gas (SF
6Volume fraction is 0.5%) put into crucible and melt under the protection; when fusing back body temperature degree fusion is 730 ℃; pure Al, pure Bi, pure Zn, Al-Mn master alloy and Mg-Nd master alloy in melt after the adding preheating; stir alloying element then to dissolving in melt fully; melt is warming up to the conventional refining agent of Mg alloy RJ-2 that 730-750 ℃ of adding account for melt 1wt% carries out refining;, be cooled to 700 ℃ with crucible and leave standstill after 20-30 minute 730-750 ℃ of insulation.
(3) take out crucible, behind the skimming operation at CO
2With SF
6Mixed gas (SF
6Volume fraction is 0.5%) protection under carry out casting.
The grain-size of alloy of the present invention is 114 μ m, and the grain structure macrograph is shown in Fig. 1 (b), and as-cast microstructure as shown in Figure 2.(Fig. 1 (a)) compares with the AZ80 alloy, as can be seen, the obvious refinement of the crystal grain of alloy of the present invention, precipitated phase is tiny complete disperse distribution.
Yield strength under the alloy casting state of the present invention is 128MPa, and tensile strength is 215MPa, and unit elongation is 6.4%.
This alloy is carried out T6 handle, earlier 415 ℃ of solution treatment 18 hours, after 70 ℃ of hot water were quenched to room temperature, 200 ℃ of following timeliness 24 hours, air cooling was to room temperature then.Yield strength is 141MPa, and tensile strength is 225MPa, and unit elongation is 5.0%.
Table 1 is the mechanical property contrast of the AZ80 alloy under alloy of the present invention and the same terms, as can be seen from Table 1, alloy casting state lower yield strength of the present invention is brought up to 128MPa from 97MPa, makes the yield strength of AZ80 alloy improve 32.0%, has surpassed the yield strength 122MPa of T6 attitude AZ80 alloy.Under the T6 attitude (after the solid solution in 200 ℃ of timeliness 24h), the yield strength of alloy of the present invention is further enhanced, and reaches 141MPa.
Table 1
Embodiment 2
Difference from Example 1 is:
In the present embodiment, each component of high-strength cast magnesium alloys and the weight percent thereof of Bi and Nd complex intensifying are: 9.0%Al, 0.6%Zn, 0.2%Mn, 1.0%Bi, 0.5%Nd, and impurity element Fe0.002%, Cu0.010%, Ni0.001%, all the other are Mg.
Alloy casting state lower yield strength of the present invention is 105MPa, and tensile strength is 203MPa, and unit elongation is 7.2%.T6 attitude lower yield strength is 135MPa, and tensile strength is 230MPa, and unit elongation is 4.8%.
Embodiment 3
Difference from Example 1 is:
In the present embodiment, each component of high-strength cast magnesium alloys and the weight percent thereof of Bi and Nd complex intensifying are: 7.0%Al, 0.3%Zn, 0.3%Mn, 0.2%Bi, 1.2%Nd, and impurity element Fe0.001%, Cu0.009%, Ni0.001%, all the other are Mg.
Alloy casting state lower yield strength of the present invention is 104MPa, and tensile strength is 224MPa, and unit elongation is 8.4%.T6 attitude lower yield strength is 140MPa, and tensile strength is 232MPa, and unit elongation is 5.0%.
Embodiment 2,3 results show that the present invention generates Mg simultaneously by adding Bi and Nd
3Bi
2, Al
2Nd and Al
11Nd
3Mutually compound enhancing magnesium alloy in the mode of precipitation strength and refined crystalline strengthening, has obtained to have the Mg-Al-Zn-Mn-Bi-Nd alloy of good as cast condition and heat treatment state performance.Alloy of the present invention is under as cast condition and T6 attitude, and yield strength and tensile strength all are better than traditional AZ series magnesium alloy.
Claims (6)
1. the high-strength cast magnesium alloys of Bi and Nd complex intensifying, it is characterized in that, each component of alloy and weight percent thereof are: 3.0～10.0%Al, 0.01～1.0%Zn, 0.01～1.0%Mn, 0.01～3.0%Bi, 0.01～3.0%Nd, impurity element Fe＜0.005%, Cu＜0.015%, Ni＜0.002%, all the other are Mg.
2. according to the high-strength cast magnesium alloys of described Bi of claim 1 and Nd complex intensifying, it is characterized in that Mn, Nd add with the form of Al-Mn, Mg-Nd master alloy, Al, Zn, Bi add in the mode of pure Al, pure Zn, pure Bi.
3. according to the high-strength cast magnesium alloys of described Bi of claim 1 and Nd complex intensifying, it is characterized in that, each component of alloy and weight percent thereof are preferably: 5.0～9.0%Al, 0.1～0.8%Zn, 0.1～0.7%Mn, 0.1～2.0%Bi, 0.1～2.0%Nd, impurity element Fe, Cu, Ni total amount＜0.015%, all the other are Mg.
4. according to the preparation method of the high-strength cast magnesium alloys of described Bi of claim 1 and Nd complex intensifying; it is characterized in that; the founding of alloy is as follows: fusion process carries out under gas shield; after the pure magnesium fusing; add pure Al, pure Zn, pure Bi, Al-Mn master alloy and Mg-Nd master alloy respectively; after treating that alloying element dissolves fully, adopt conventional refining agent of Mg alloy to carry out refining, cast behind the thermal insulation deslagging.
5. according to the preparation method of the high-strength cast magnesium alloys of described Bi of claim 4 and Nd complex intensifying, it is characterized in that castmethod adopts pressure die casting, permanent mold casting or sand mold casting.
6. according to the preparation method of the high-strength cast magnesium alloys of described Bi of claim 4 and Nd complex intensifying, it is characterized in that, the heat treatment of alloy mode is: solid solution and timeliness, earlier 400～450 ℃ of following solution treatment 16～20 hours, 50～80 ℃ of hot water are quenched to room temperature, 150～250 ℃ of following timeliness 20～30 hours, air cooling was to room temperature then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110210785 CN102242299A (en) | 2011-07-26 | 2011-07-26 | Bi and Nd composite reinforced high-strength cast magnesium alloy and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110210785 CN102242299A (en) | 2011-07-26 | 2011-07-26 | Bi and Nd composite reinforced high-strength cast magnesium alloy and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102242299A true CN102242299A (en) | 2011-11-16 |
Family
ID=44960540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110210785 Pending CN102242299A (en) | 2011-07-26 | 2011-07-26 | Bi and Nd composite reinforced high-strength cast magnesium alloy and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102242299A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925775A (en) * | 2012-11-26 | 2013-02-13 | 郑州大学 | Low-deformation-resistance wrought magnesium alloy and preparation method thereof |
| CN103911534A (en) * | 2014-04-11 | 2014-07-09 | 芜湖职业技术学院 | Rare earth magnesium alloy and preparation method thereof |
| CN105112751A (en) * | 2015-10-18 | 2015-12-02 | 河北工业大学 | High-strength cast magnesium alloy and preparation method thereof |
| CN105154734A (en) * | 2015-10-18 | 2015-12-16 | 河北工业大学 | High-speed-extrudable wrought magnesium alloy and preparation method thereof |
| CN105238977A (en) * | 2015-11-06 | 2016-01-13 | 中国石油大学(华东) | High-damping magnesium alloy composite material and preparation method thereof |
| CN109182809A (en) * | 2018-11-19 | 2019-01-11 | 河北工业大学 | A kind of tough wrought magnesium alloy of high strength and low cost and preparation method thereof |
| CN112522561A (en) * | 2020-12-03 | 2021-03-19 | 广东省科学院材料与加工研究所 | Die-casting magnesium alloy and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401804A (en) * | 2001-08-22 | 2003-03-12 | 东南大学 | Low cost heat-resistant magnesium alloy |
| CN1938441A (en) * | 2004-05-19 | 2007-03-28 | 中国科学院金属研究所 | High-strength-toughness magnesium alloy and its preparing method |
| CN101463441A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Rare earth-containing high strength heat resisting magnesium alloy and preparation thereof |
| CN101961779A (en) * | 2004-06-30 | 2011-02-02 | 住友电气工业株式会社 | The manufacture method of magnesium alloy materials |
-
2011
- 2011-07-26 CN CN 201110210785 patent/CN102242299A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1401804A (en) * | 2001-08-22 | 2003-03-12 | 东南大学 | Low cost heat-resistant magnesium alloy |
| CN1938441A (en) * | 2004-05-19 | 2007-03-28 | 中国科学院金属研究所 | High-strength-toughness magnesium alloy and its preparing method |
| CN101961779A (en) * | 2004-06-30 | 2011-02-02 | 住友电气工业株式会社 | The manufacture method of magnesium alloy materials |
| CN101463441A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Rare earth-containing high strength heat resisting magnesium alloy and preparation thereof |
Non-Patent Citations (1)
| Title |
|---|
| 《中国优秀硕士学位论文全文数据库工程科技I辑》 20110715 任文亮 "Bi，Y和Nd对AZ81镁合金力学性能的影响" 第B022-32页 1-6 , 第07期 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925775A (en) * | 2012-11-26 | 2013-02-13 | 郑州大学 | Low-deformation-resistance wrought magnesium alloy and preparation method thereof |
| CN102925775B (en) * | 2012-11-26 | 2015-02-25 | 郑州大学 | Low-deformation-resistance wrought magnesium alloy and preparation method thereof |
| CN103911534A (en) * | 2014-04-11 | 2014-07-09 | 芜湖职业技术学院 | Rare earth magnesium alloy and preparation method thereof |
| CN105112751A (en) * | 2015-10-18 | 2015-12-02 | 河北工业大学 | High-strength cast magnesium alloy and preparation method thereof |
| CN105154734A (en) * | 2015-10-18 | 2015-12-16 | 河北工业大学 | High-speed-extrudable wrought magnesium alloy and preparation method thereof |
| CN105238977A (en) * | 2015-11-06 | 2016-01-13 | 中国石油大学(华东) | High-damping magnesium alloy composite material and preparation method thereof |
| CN109182809A (en) * | 2018-11-19 | 2019-01-11 | 河北工业大学 | A kind of tough wrought magnesium alloy of high strength and low cost and preparation method thereof |
| CN109182809B (en) * | 2018-11-19 | 2020-07-28 | 河北工业大学 | Low-cost high-toughness wrought magnesium alloy and preparation method thereof |
| CN112522561A (en) * | 2020-12-03 | 2021-03-19 | 广东省科学院材料与加工研究所 | Die-casting magnesium alloy and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100467647C (en) | High-strength heat-proof compression casting magnesium alloy and preparation method thereof | |
| CN102978497B (en) | Casting magnesium alloy with high strength and toughness and preparation method thereof | |
| CN102732763B (en) | High-strength Mg-Gd-Y-Zn-Mn alloy | |
| CN102242299A (en) | Bi and Nd composite reinforced high-strength cast magnesium alloy and preparation method thereof | |
| CN101205578A (en) | High-strength high-ductility corrosion-resistant Al-Zn-Mg-(Cu) alloy | |
| CN102230118A (en) | Magnesium alloy of high intensity and high yield ratio and preparation method thereof | |
| CN104046867A (en) | High-plasticity heat-conducting magnesium alloy and preparation method thereof | |
| CN104152769B (en) | A kind of heat conductive magnesium alloy and preparation method thereof | |
| Yang et al. | Effects of Sn addition on as-cast microstructure, mechanical properties and casting fluidity of ZA84 magnesium alloy | |
| CN101353744A (en) | Stress corrosion resistant Al-Zn-Mg-(Cu) alloy and preparation thereof | |
| CN103305738B (en) | Siliceous heat resisting magnesium-rare earth alloy and preparation method thereof | |
| CN103498086A (en) | High-strength high-ductility magnesium alloy and preparation process thereof | |
| CN101012524A (en) | Compression casting heat-stable magnesium alloy | |
| CN113564435A (en) | High-strength cast aluminum alloy and preparation method thereof | |
| CN107841665A (en) | A kind of high-strength/tenacity aluminum alloy sheet material of scandium containing rare earth and erbium and preparation method thereof | |
| CN109852859B (en) | High-strength-toughness heat-resistant Mg-Y-Er alloy suitable for gravity casting and preparation method thereof | |
| CN103469039B (en) | The magnesium-aluminum-zinc wrought magnesium alloys of a kind of calcic and rare earth samarium | |
| CN105349863A (en) | High-strength rare earth magnesium alloy capable of preparing large-size ingot and method | |
| CN102162054B (en) | High-toughness magnesium alloy and preparation method thereof | |
| Ding et al. | Effect of Al addition on microstructure and mechanical properties of Mg− Gd− Zn alloys | |
| CN109943758B (en) | High-strength high-toughness heat-resistant die-casting Mg-Er alloy and preparation method thereof | |
| CN101921940A (en) | Magnesium alloy and preparation method thereof | |
| CN101407880A (en) | Mg-Zn-Zr-Nd magnesium alloy and preparation thereof | |
| CN103225031B (en) | A kind of Magnesium-zinc-mangaalloytin-neodymium alloytin-neodymium and preparation method thereof | |
| CN102230117B (en) | Magnesium-aluminium-calcium wrought magnesium alloy with rare earth neodymium and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111116 |