CN102828082A - Co-RE containing aluminum alloy material - Google Patents
Co-RE containing aluminum alloy material Download PDFInfo
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- CN102828082A CN102828082A CN2011101593994A CN201110159399A CN102828082A CN 102828082 A CN102828082 A CN 102828082A CN 2011101593994 A CN2011101593994 A CN 2011101593994A CN 201110159399 A CN201110159399 A CN 201110159399A CN 102828082 A CN102828082 A CN 102828082A
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Abstract
The invention discloses a Co-RE containing aluminum alloy material which comprises components by weight percent: 6.2 to 6.9 % of Cu, 0.6 to 0.75 % Mn, 0.15 to 0.2 % of Cd, 0.42 to 0.48 % of Ti, 0.16 to 0.19 % of B, 0.3 to 0.45 % of Zr, 0.85 to 0.95 % of Co, 3.2 to 4.5 % of rare earth element RE and the balance being Al. The Co-RE containing aluminum alloy material provided by the invention has characteristics of high strength, good heat resistance, small hot cracking tendency, high elongation and low cost.
Description
Technical field
The present invention relates to a kind of aluminum alloy materials, particularly a kind of high strength heat resistant alloy material.
Background technology
Development along with the national economy and the modernization of national defense; Duraluminum is more and more wider as the range of application of light material in every field; Particularly in fields such as aerospace, ships, petrochemical complex, communications and transportation, electric power, electronics, buildings, the demand that aluminum alloy materials is had the high-strength temperature-resistant performance is more and more urgent.Duraluminum mainly contains several series such as Al-Cu, Al-Si, Al-Mg in the world; Wherein Al-Cu is an alloy owing to have characteristics such as density is little, specific tenacity height; Also have good machinability and resistance toheat simultaneously, main as the structural part and the heat-resisting part that bear big load.More than several kinds series alloy in, most intensity all is lower than 400MPa, under the hot conditions more than 250 ℃, instantaneous strength generally all is lower than 200Mpa, creep rupture strength is lower than 100MPa.
Wherein the intensity of aluminum alloy of the several trades mark in the Al-Cu system is greater than 400MPa, but that this is the castability of alloy is poor.In the disclosed document " the microalloying mechanism of action of Sc in duraluminum "; Having described micro-Sc is the effect in the alloy at aluminum bronze; Sc has solid solution-precipitation strength, dispersion-strengthened and grain-boundary strengthening effect; Can suppress the effect of the hot cracking tendency of high-strength aluminium copper alloy, improve the corrosion resistance nature of duraluminum; But scandium is added in the aluminum-copper alloy that thermal treatment can strengthen, under crucial component, generate the W phase, the over-all properties of alloy is had detrimental effect, and scandium belongs to noble metal, Al-Cu-Sc line aluminium alloy manufacturing cost is high.
At present in several kinds of 2XXX line aluminium alloy materials of development; Multiple micro alloying element and REE have been added; Micro alloying element is like Mn, Zr, Cd, Ti, Cr etc.; This kind duraluminum has advantages of higher tensile strength and unit elongation, but that the defective that this type of duraluminum exists is the hot cracking tendency of aluminum alloy materials is big, and castability is poor.
Thus, develop a kind of aluminum alloy materials and have crucial meaning with characteristics such as high-strength temperature-resistant, hot cracking tendency are little, unit elongation is high, cost is low.
Summary of the invention
The purpose of this invention is to provide a kind of Co-RE aluminum alloy materials, this aluminum alloy materials has the intensity height, good heat resistance, the characteristics that hot cracking tendency is little, unit elongation is high, cost is low.
Technical scheme of the present invention is:
The composition and the weight percent of Co-RE aluminum alloy materials are following:
Cu:4.5-5.8%; Mn:0.9-1.4%; Cd:0.05-0.1%; Ti:0.2-0.3%; B:0.12-0.14%; Zr:0.05-0.2%; Co:0.65-0.75%; Rare earth elements RE: 1.2-3.0%; All the other are Al.
Further, said rare earth elements RE comprises one or more the mixed rare-earth elements among La, Ce, Pr, Nd, Er and the Y.
Further, the composition of said aluminum alloy materials and content thereof are Cu:6.2-6.5%; Mn:0.6-0.65%; Cd:0.15-0.18%; Ti:0.42-0.45%; B:0.16-0.18%; Zr:0.3-0.4%; Co:0.85-0.9%; Rare earth elements RE: 3.2-3.8%; All the other are Al.
Further, the composition of said aluminum alloy materials and content thereof are Cu:6.5-6.9%; Mn:0.65-0.7%; Cd:0.18-0.0.2%; Ti:0.45-0.48%; B:0.18-0.19%; Zr:0.35-0.42%; Co:0.86-0.88%; Rare earth elements RE: 4.2-4.5%; All the other are Al.
Further, the composition of said aluminum alloy materials and content thereof are Cu:6.4-6.7%; Mn:0.7-0.75%; Cd:0.16-0.19%; Ti:0.44-0.46%; B:0.17-0.19%; Zr:0.42-0.45%; Co:0.9-0.95%; Rare earth elements RE: 3.8-4.2%; All the other are Al.
Co-RE aluminum alloy materials provided by the invention is main alloying element with Cu, Mn, REE, is polynary microalloy element with Cd, Ti, B, Zr, Co, has the following advantages:
1, high-strength temperature-resistant property: it is 1.5-3.5% that aluminum alloy materials of the present invention is selected the scope of Cu for use, and the scope of REE is 0.4-0.9%, and the REE chemical property is more active, can form intermetallic compound with many elements, has very high thermostability; The plain proportional adding of Cu and rare earth, the poorness of the matrix solute element that causes with compensation formation rare earth compound, thus under the condition that does not reduce normal temperature strength, improve the high-temperature behavior of alloy; Add a certain proportion of and REE simultaneously and form Mn stable, the refractory metal compound, Zr, Co element; Further improve the recrystallization temperature of alloy, the effect of refinement recrystal grain; Alloy matrix aluminum and crystal boundary are strengthened simultaneously; Co has the dislocation of the crystal grain of obstruction, stops the effect of grain sliding, thereby has excellent high-temperature and normal temperature comprehensive mechanical performance.
2, reduce hot cracking tendency: Cu content is big in the alloy; Form rich Cu phase; Rich Cu is distributed in crystal boundary as the thin brilliant disperse phase of HMP with the disperse of metallic compound form, the strong tendency that spreads to crystal boundary of having offset effectively when melt crystallization that the rich Cu solute of intragranular forms because of degree of supersaturation sharply raises, thereby the structural stress when having slowed down crystallization; Reduced the hot cracking tendency of aluminum alloy materials, made the aluminium alloy casting performance good.
3, unit elongation is high: added Cd, Ti, B, Zr, Co microalloy element in the alloy material, the multiple disperse phase of rich Cu and microalloy element on the crystal boundary all has the effect of crystal grain thinning; REE is concentrated and is distributed on the crystal boundary face, hinders crystal boundary and moves, and the forming core merit that forms the critical size nucleus is reduced, and nuclei of crystallization quantity increases, thereby makes grain refining, improves unit elongation, and processing characteristics is good.
4, low cost of manufacture: aluminum alloy materials according to the invention does not add the noble metal element, the low cost of manufacture of duraluminum.
Co-RE high strength heat resistant alloy material of the present invention, tensile strength is 510-545MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is greater than 300MPa, and under 300 ℃ condition, high temperature tensile strength is greater than 200MPa; Unit elongation is 5-7%.
Embodiment
Below in conjunction with specific embodiment technical scheme of the present invention is done further detailed description, but embodiment of the present invention is not limited thereto.
The component of alloy material and content (quality: g) as follows:
(gross weight is in 1000g)
Embodiment 1
The aluminum alloy materials of present embodiment, tensile strength is 510MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 300MPa, and under 300 ℃ condition, high temperature tensile strength is 200MPa; Unit elongation is 5%.
Embodiment 2
The aluminum alloy materials of present embodiment, tensile strength is 515MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 305MPa, and under 300 ℃ condition, high temperature tensile strength is 203MPa; Unit elongation is 5.2%.
Embodiment 3
The aluminum alloy materials of present embodiment, tensile strength is 518MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 308MPa, and under 300 ℃ condition, high temperature tensile strength is 208MPa; Unit elongation is 5.5%.
Embodiment 4
The aluminum alloy materials of present embodiment, tensile strength is 520MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 306MPa, and under 300 ℃ condition, high temperature tensile strength is 205MPa; Unit elongation is 5.8%.
Embodiment 5
The aluminum alloy materials of present embodiment, tensile strength is 525MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 307MPa, and under 300 ℃ condition, high temperature tensile strength is 210MPa; Unit elongation is 6%.
Embodiment 6
The aluminum alloy materials of present embodiment, tensile strength is 528MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 310MPa, and under 300 ℃ condition, high temperature tensile strength is 210MPa; Unit elongation is 6.2%.
Embodiment 7
The aluminum alloy materials of present embodiment, tensile strength is 530MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 310MPa, and under 300 ℃ condition, high temperature tensile strength is 209MPa; Unit elongation is 6.5%.
Embodiment 8
The aluminum alloy materials of present embodiment, tensile strength is 532MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 312MPa, and under 300 ℃ condition, high temperature tensile strength is 212MPa; Unit elongation is 6.7%.
Embodiment 9
The aluminum alloy materials of present embodiment, tensile strength is 533MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 315MPa, and under 300 ℃ condition, high temperature tensile strength is 213MPa; Unit elongation is 6.8%.
Embodiment 10
The aluminum alloy materials of present embodiment, tensile strength is 535MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 318MPa, and under 300 ℃ condition, high temperature tensile strength is 215MPa; Unit elongation is 7%.
Embodiment 11
The aluminum alloy materials of present embodiment, tensile strength is 540MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 320MPa, and under 300 ℃ condition, high temperature tensile strength is 217MPa; Unit elongation is 6.8%.
Embodiment 12
The aluminum alloy materials of present embodiment, tensile strength is 542MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 318MPa, and under 300 ℃ condition, high temperature tensile strength is 215MPa; Unit elongation is 7.0%.
Embodiment 13
The aluminum alloy materials of present embodiment, tensile strength is 543MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 319MPa, and under 300 ℃ condition, high temperature tensile strength is 216MPa; Unit elongation is 6.6%.
Embodiment 14
The aluminum alloy materials of present embodiment, tensile strength is 545MPa under the room temperature condition, and the intensity under 250 ℃ hot conditions is 320MPa, and under 300 ℃ condition, high temperature tensile strength is 215MPa; Unit elongation is 6.9%.
Claims (5)
1. Co-RE aluminum alloy materials is characterized in that its composition and weight percent are following:
Cu:6.2-6.9%; Mn:0.6-0.75%; Cd:0.15-0.2%; Ti:0.42-0.48%; B:0.16-0.19%; Zr:0.3-0.45%; Co:0.85-0.95%; Rare earth elements RE: 3.2-4.5%; All the other are Al.
2. Co-RE aluminum alloy materials according to claim 1 is characterized in that, said rare earth elements RE comprises one or more the mixed rare-earth elements among La, Ce, Pr, Nd, Er and the Y.
3. Co-RE aluminum alloy materials according to claim 1 is characterized in that, the composition of said aluminum alloy materials and content thereof are Cu:6.2-6.5%; Mn:0.6-0.65%; Cd:0.15-0.18%; Ti:0.42-0.45%; B:0.16-0.18%; Zr:0.3-0.4%; Co:0.85-0.9%; Rare earth elements RE: 3.2-3.8%; All the other are Al.
4. Co-RE aluminum alloy materials according to claim 1 is characterized in that, the composition of said aluminum alloy materials and content thereof are Cu:6.5-6.9%; Mn:0.65-0.7%; Cd:0.18-0.0.2%; Ti:0.45-0.48%; B:0.18-0.19%; Zr:0.35-0.42%; Co:0.86-0.88%; Rare earth elements RE: 4.2-4.5%; All the other are Al.
5. Co-RE aluminum alloy materials according to claim 1 is characterized in that, the composition of said aluminum alloy materials and content thereof are Cu:6.4-6.7%; Mn:0.7-0.75%; Cd:0.16-0.19%; Ti:0.44-0.46%; B:0.17-0.19%; Zr:0.42-0.45%; Co:0.9-0.95%; Rare earth elements RE: 3.8-4.2%; All the other are Al.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101593994A CN102828082A (en) | 2011-06-14 | 2011-06-14 | Co-RE containing aluminum alloy material |
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| CN2011101593994A CN102828082A (en) | 2011-06-14 | 2011-06-14 | Co-RE containing aluminum alloy material |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10237576A (en) * | 1997-02-26 | 1998-09-08 | Nippon Steel Corp | Aluminum alloy sheet excellent in formability, baking finish hardenability, chemical conversion treatment property, and corrosion resistance and its production |
| CN101363092A (en) * | 2008-07-09 | 2009-02-11 | 贵州铝厂 | High-strength cast aluminium alloy material |
| CN101805855A (en) * | 2009-09-23 | 2010-08-18 | 贵州华科铝材料工程技术研究有限公司 | Co-RE high-strength heat-resisting aluminum alloy material and production method thereof |
| CN102021371A (en) * | 2009-09-09 | 2011-04-20 | 贵州华科铝材料工程技术研究有限公司 | Co-Cr-RE aluminium alloy material with high strength and heat resistance and preparation method thereof |
-
2011
- 2011-06-14 CN CN2011101593994A patent/CN102828082A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10237576A (en) * | 1997-02-26 | 1998-09-08 | Nippon Steel Corp | Aluminum alloy sheet excellent in formability, baking finish hardenability, chemical conversion treatment property, and corrosion resistance and its production |
| CN101363092A (en) * | 2008-07-09 | 2009-02-11 | 贵州铝厂 | High-strength cast aluminium alloy material |
| CN102021371A (en) * | 2009-09-09 | 2011-04-20 | 贵州华科铝材料工程技术研究有限公司 | Co-Cr-RE aluminium alloy material with high strength and heat resistance and preparation method thereof |
| CN101805855A (en) * | 2009-09-23 | 2010-08-18 | 贵州华科铝材料工程技术研究有限公司 | Co-RE high-strength heat-resisting aluminum alloy material and production method thereof |
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Application publication date: 20121219 |