CN100572578C - A kind of scandium-containing casting heat-resistant aluminum alloy and preparation method thereof - Google Patents
A kind of scandium-containing casting heat-resistant aluminum alloy and preparation method thereof Download PDFInfo
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- CN100572578C CN100572578C CNB2007100360721A CN200710036072A CN100572578C CN 100572578 C CN100572578 C CN 100572578C CN B2007100360721 A CNB2007100360721 A CN B2007100360721A CN 200710036072 A CN200710036072 A CN 200710036072A CN 100572578 C CN100572578 C CN 100572578C
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Abstract
The present invention relates to a kind of scandium-containing casting heat-resistant aluminum alloy.Belong to the cast aluminium alloy material field.Concrete component of the present invention and weight percent thereof are: Cu:4～6.5%, and Mg:0.4～1.5%, Ag:0.3～1.5%, Mn:0.3～0.6%, Zr:0.05～0.30%, Sc:0.05～0.60%, surplus is Al.Method of the present invention is that the cast aluminium alloy preparation method compares with existing Al-Cu, has improved castability, has increased substantially middle temperature mechanical property.
Description
Technical field
The invention belongs to cast aluminium alloy material, relate to a kind of aluminium copper magnesium silver series casting heat-resistant aluminum alloy, particularly relate to a kind of aluminium copper magnesium silver series casting heat-resistant aluminum alloy that contains the rare earth scandium and preparation method thereof.
Background technology
Aluminum bronze is that cast aluminium alloy is a kind of heat-treatable strengthened type aluminium alloy, since its age hardening ability preferably and thermostability, warm structured material in being used as.Belong to this quasi-representative material 242.0 of the ZL201 of China and the U.S. is arranged.The main chemical compositions of ZL201 cast aluminium alloy and weight percent are: Cu 4.5～5.3%, and Mn 0.6～1.0%, and Ti 0.15～0.35%, and all the other are Al, its room temperature tensile strength sigma
bBe 363MPa, σ in the time of 300 ℃
bBe 118MPa; 242.0 the main chemical compositions of cast aluminium alloy and weight percent thereof are: Cu 3.5～4.5%, and Mg 1.2～1.8%, and Ni 1.7～2.3%, and all the other are aluminium, its room temperature tensile strength sigma
bBe 275MPa, σ in the time of 300 ℃
bBe 55MPa.Because of the room temperature and the medium temperature intensity of these two kinds of casting alloys are relatively low, it is mainly used in the Working environment when being no more than 150 ℃.Be necessary further to improve its mechanical property for this reason, make alloy have room temperature and middle temperature tensile strength preferably.Still do not utilize at present rare earth scandium alloy technology to promote the bibliographical information of the structural transformation of aluminium copper magnesium silver series cast aluminium alloy and its resistance toheat of raising.
Summary of the invention
Purpose of the present invention is at prior art deficiency and defective, a kind of aluminium copper magnesium silver series casting heat-resistant aluminum alloy of rare earth scandium alloyization is provided, make it pass through the alloying of rare earth scandium, come refinement alloy grain degree, the size of refinement timeliness precipitated phase, improve the thermostability of precipitated phase, improve the bulk strength and the middle temperature resistance toheat of alloy, make the performance of alloy surpass ZL201 and 242.0 alloys.
The present invention is achieved by the following technical solutions, and aluminium copper magnesium silver series alloy component of the present invention and weight percent are: Cu:4～6.5%, Mg:0.4～1.5%, Ag:0.3～1.5%, Mn:0.3～0.6%, Zr:0.05～0.30%, Sc:0.05～0.60%, surplus are Al.
Preparation method of the present invention is: the weight percent of each component is: Cu:4～6.5%, and Mg:0.4～1.5%, Ag:0.3～1.5%, Mn:0.3～0.6%, Zr:0.05～0.30%, Sc:0.05～0.60%, surplus is Al; Alloy is prepared burden according to the above ratio, the melting ingot casting, ingot casting is handled through 450～500 ℃ of homogenizing, and 515～535 ℃ of solid solutions, 150～200 ℃ of artificial agings are handled.
Concrete preparation process of the present invention is: alloying ingredient is carried out melting in the Medium frequency induction resistance furnace, and use C
2Cl
6Carry out concisely, after melt leaves standstill, skims, be cast into round base by swage, ingot casting is handled 450～500 ℃ of homogenizing, and then through after 515～535 ℃ of solution hardening, carries out 150～200 ℃ of artificial agings and handle.
Most preferred embodiment of the present invention is as follows:
Add the casting heat-resistant aluminum alloy that 0.05%Sc forms, its component and weight percent are: 5.1%Cu, and 0.85%Mg, 0.50%Ag, 0.45%Mn, 0.20%Zr, 0.05%Sc, all the other are Al.Tensile strength of alloys σ
bBe at least: room temperature-351MPa, 300 ℃-175MPa, elongation is at least 5.0%.
Add the casting heat-resistant aluminum alloy that 0.30%Sc forms, its component and weight percent are: 5.35%Cu, and 0.75%Mg, 1.2%Ag, 0.60%Mn, 0.30%Zr, 0.30%Sc, all the other are Al.Tensile strength of alloys σ
bBe at least: room temperature-430MPa, 300 ℃-223MPa, elongation is at least 5.5%.
Add the casting heat-resistant aluminum alloy that 0.60%Sc forms, its component and weight percent are: 6.0%Cu, and 1.0%Mg, 0.82%Ag, 0.38%Mn, 0.15%Zr, 0.60%Sc, all the other are Al.Tensile strength of alloys σ
bBe at least: room temperature-410MPa, 300 ℃-203MPa, elongation is at least 4.5%.
Compared with prior art, the invention has the advantages that:
The present invention has substantive distinguishing features and unusual effect, and the present invention adds the trace rare-earth scandium in existing aluminium copper magnesium silver series alloy, utilize the effect of micro-scandium to make the original as-cast structure of aluminium copper magnesium silver series alloy obtain refinement.The as-cast structure that obtains refinement is handled by further solid solution aging, to obtain better tissues, improved the bulk strength and the middle temperature resistance toheat of casting alloy, made its performance be in optimum regime, the performance of alloy obviously surpasses traditional ZL201 and 242.0 cast aluminium alloys.
Description of drawings
Fig. 1: the as-cast structure photo of the embodiment of the invention 1 alloy;
Fig. 2: the as-cast structure photo of the embodiment of the invention 2 alloys;
Fig. 3: the as-cast structure photo of the embodiment of the invention 3 alloys;
Fig. 4: the as-cast structure photo of the embodiment of the invention 4 alloys;
Embodiment
Provide following example in conjunction with method of the present invention:
Embodiments of the invention be the aluminium copper magnesium silver series alloy (Cu:4～8%, Mg:0.4～1.5%, Ag:0.3～1.5%, Mn:0.3～0.6%, Zr:0.05～0.30%, Sc:0.05～0.60%, surplus is Al.) adding the scandium of different content in the batching, its composition is different from ZL201 cast aluminium alloy and 242.0 cast aluminium alloys (shown in table 1 and 2).Alloy adopts the melting of Medium frequency induction resistance furnace, and uses C
2Cl
6Carry out concisely, be cast into round base by swage, ingot casting is handled through homogenizing earlier, and ageing treatment is carried out in solution hardening more subsequently.Room temperature and middle temperature tensile strength are apparently higher than ZL201 and 242.0 alloys (shown in the table 3 and 4).Specific embodiment is described as follows:
Embodiment 1
In the aluminium-copper-magnesium-silver alloy, add 0.05%Sc, (raw material is alloying ingredient: A00 fine aluminium, Al-50Cu master alloy, No. 2 pure magnesiums, 99.9% silver, Al-10Mn master alloy, Al-4Zr master alloy, the Al-2Sc master alloy) melting in SG-12-13 type Medium frequency induction resistance furnace, and use C
2Cl
6Carry out refining processing, through leaving standstill, skimming, be cast into round base by swage, 460 ℃ of homogenizing are handled, and then 535 ℃ of solution hardening, carry out artificial aging at 200 ℃ again and handle.The component of alloy and weight percent thereof are 5.1%Cu, 0.85%Mg, and 0.50%Ag, 0.45%Mn, 0.20%Zr, 0.05%Sc, all the other are Al.Tensile strength of alloys σ
b: room temperature 〉=350MPa, 300 ℃ 〉=170MPa.
Embodiment 2
In the aluminium-copper-magnesium-silver alloy, add 0.30%Sc, (raw material is alloying ingredient: A00 fine aluminium, Al-50Cu master alloy, No. 2 pure magnesiums, 99.9% silver, Al-10Mn master alloy, Al-4Zr master alloy, the Al-2Sc master alloy) melting in SG-12-13 type Medium frequency induction resistance furnace, and use C
2Cl
6Carry out refining processing, through leaving standstill, skimming, be cast into round base by swage, 500 ℃ of homogenizing are handled, and after 525 ℃ of solution hardening, carry out artificial aging at 185 ℃ again and handle then.The component of alloy and weight percent thereof are 5.35%Cu, 0.75%Mg, and 1.2%Ag, 0.60%Mn, 0.30%Zr, 0.30%Sc, all the other are Al.Tensile strength of alloys σ
b: room temperature 〉=430MPa, 300 ℃ 〉=220MPa.
Embodiment 3
In the aluminium-copper-magnesium-silver alloy, add 0.60%Sc, (raw material is alloying ingredient: A00 fine aluminium, Al-50Cu master alloy, No. 2 pure magnesiums, 99.9% silver, Al-10Mn master alloy, Al-4Zr master alloy, the Al-2Sc master alloy) melting in SG-12-13 type Medium frequency induction resistance furnace, and use C
2Cl
6Carry out refining processing, through leaving standstill, skimming, be cast into round base by swage, 480 ℃ of homogenizing are handled, and after 515 ℃ of solution hardening, carry out artificial aging at 150 ℃ again and handle then.The component of alloy and weight percent thereof are 6.0%Cu, 1.0%Mg, and 0.8%Ag, 0.38%Mn, 0.15%Zr, 0.60%Sc, all the other are Al.Tensile strength of alloys σ
b: room temperature 〉=410MPa, 300 ℃ 〉=200MPa.
Embodiment 4
In the aluminium-copper-magnesium-silver alloy, add 0.01%Sc, (raw material is alloying ingredient: A00 fine aluminium, Al-50Cu master alloy, No. 2 pure magnesiums, 99.9% silver, Al-10Mn master alloy, Al-4Zr master alloy, the Al-2Sc master alloy) melting in SG-12-13 type Medium frequency induction resistance furnace, and use C
2Cl
6Carry out refining processing, through leaving standstill, skimming, be cast into round base by swage, 490 ℃ of homogenizing are handled, and after 510 ℃ of solution hardening, carry out artificial aging at 165 ℃ again and handle then.The component of alloy and weight percent thereof are 4.5%Cu, 0.40%Mg, and 0.32%Ag, 0.20%Mn, 0.10%Zr, 0.01%Sc, all the other are Al.Tensile strength of alloys σ
b: room temperature 〉=335MPa, 300 ℃ 〉=110MPa.
The main chemical compositions of table 1 alloy of the present invention (weight percent)
| Alloy | Cu | Mg | Ag | Mn | Zr | Sc | Al |
| Embodiment 1 | 5.1 | 0.85 | 0.50 | 0.45 | 0.20 | 0.05 | Surplus |
| Embodiment 2 | 5.35 | 0.70 | 1.2 | 0.60 | 0.30 | 0.30 | Surplus |
| Embodiment 3 | 6.0 | 1.0 | 0.82 | 0.38 | 0.15 | 0.60 | Surplus |
| Embodiment 4 | 4.5 | 0.40 | 0.32 | 0.20 | 0.10 | 0.01 | Surplus |
The main chemical compositions of table 2 comparative alloy (weight percent)
| Alloy | Cu | Mg | Mn | Ti | Ni | Al |
| ZL201 | 4.5～5.3 | - | 0.6～1.0 | 0.15～0.35 | - | Surplus |
| 242.0 | 2.3 | 1.2～1.8 | - | - | 1.7～2.3 | Surplus |
The tensile property of table 3 alloy of the present invention
The tensile property of table 4 comparative alloy
Claims (3)
1, a kind of scandium-containing casting heat-resistant aluminum alloy is characterized in that, the weight percent of each component is 5.1%Cu, 0.85%Mg, and 0.50%Ag, 0.45%Mn, 0.20%Zr, 0.05%Sc, all the other are Al.
2, a kind of scandium-containing casting heat-resistant aluminum alloy is characterized in that, the weight percent of each component is 5.35%Cu, 0.75%Mg, and 1.2%Ag, 0.60%Mn, 0.30%Zr, 0.30%Sc, all the other are Al.
3, a kind of scandium-containing casting heat-resistant aluminum alloy is characterized in that, the weight percent of each component is 6.0%Cu, 1.0%Mg, and 0.82%Ag, 0.38%Mn, 0.15%Zr, 0.60%Sc, all the other are Al.
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| CN102134668B (en) * | 2011-03-02 | 2012-03-28 | 深圳市和电普华电气有限公司 | High-strength high-conductivity heat-resistant aluminum alloy wire and preparation method thereof |
| AU2016218269B2 (en) | 2015-02-11 | 2019-10-03 | Scandium International Mining Corporation | Scandium-containing master alloys and methods for making the same |
| CN104651683A (en) * | 2015-03-18 | 2015-05-27 | 中南大学 | Aluminum alloy subjected to composite microalloying of Sc and Zr and preparation method thereof |
| CN105483477A (en) * | 2015-11-27 | 2016-04-13 | 天津大学 | High-strength and high-toughness scandium-contained Al-Cu-Mg-Zr alloy and preparation method thereof |
| CN105441759A (en) * | 2015-11-27 | 2016-03-30 | 天津大学 | Sc-containing high-strength Al-Cu-Mg-Mn-Zr alloy and preparation method thereof |
| CN106555067B (en) * | 2016-12-07 | 2018-02-16 | 河北工业大学 | A kind of composite refining Modification Manners for lifting Mechanical Properties of Aluminum Alloys |
| CN109825749A (en) * | 2019-04-10 | 2019-05-31 | 上海裕纪金属制品有限公司 | One kind can punching press aluminium alloy extrusions heat-and corrosion-resistant heat treatment method and aluminium alloy extrusions |
| CN111057921A (en) * | 2019-12-20 | 2020-04-24 | 山东南山铝业股份有限公司 | High-temperature-resistant high-strength aluminum alloy and preparation method thereof |
| CN111321330B (en) * | 2020-02-25 | 2022-04-01 | 山东南山铝业股份有限公司 | Scandium-containing Al-Cu heat-resistant aluminum alloy and preparation method thereof |
| CN112458327B (en) * | 2020-11-09 | 2022-06-24 | 哈尔滨理工大学 | Method for improving organization and mechanical property of ZL207 aluminum alloy |
| CN114875285B (en) * | 2022-04-11 | 2023-10-03 | 临沂矿业集团菏泽煤电有限公司彭庄煤矿 | Heat treatment method for corrosion resistance treatment of key alloy parts of mining equipment |
| CN115786788B (en) * | 2022-12-01 | 2023-10-13 | 中南大学 | Heat-resistant corrosion-resistant Al-Cu-Mg alloy and preparation method and application thereof |
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