CN103725998A - Method for enhancing strength of Al-Cu-Mg alloy - Google Patents
Method for enhancing strength of Al-Cu-Mg alloy Download PDFInfo
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- CN103725998A CN103725998A CN201310718945.2A CN201310718945A CN103725998A CN 103725998 A CN103725998 A CN 103725998A CN 201310718945 A CN201310718945 A CN 201310718945A CN 103725998 A CN103725998 A CN 103725998A
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Abstract
The invention relates to a heat treatment method for enhancing strength of an Al-Cu-Mg alloy. The method comprises the following steps: holding an Al-4.31Cu-1.60Mg aluminum alloy used as an experimental material at 490-500 DEG C for 30-50 minutes to perform solution treatment, carrying out cold rolling at the deformation rate of 10-50%, and carrying out artificial aging at 150-200 DEG C for 1-12 hours or natural aging at room temperature for 36 hours. The ultimate tensile strength of the treated alloy can reach 540 MPa, the yield strength can reach 375 MPa, the elongation percentage is 12.5%, and the alloy has better properties than like alloys subjected to other heat treatment processes.
Description
Technical field
The present invention relates to a kind of heat treating method, is a kind of heat treating regime that can be used for improving Al-Cu-Mg alloy strength, belongs to non-ferrous metal technical field.
Background technology
Al-Cu-Mg alloy belongs to heat-treatable strengthened wrought aluminium alloy, has the features such as medium tenacity, high damage tolerance, and be used as aerospace industry primary structure material due to it.Its performance and thermal treatment process are in close relations, for improving alloy strength, should formulate rational system of heat treatment process.
To Al-Cu-Mg alloy, general employing solid solution at present adds the heat treating regime of natural aging.Alloy mechanical property after processing is like this not high.The technical study of in recent years, the alloy in heat treatment process being carried out to certain deformation rate processing has obtained greater advance.But be mostly that the distortion of single, small deformation rate is in conjunction with the research of ageing treatment, not system.
The present invention has studied the deformation rate of relative broad range, coordinates preferably institution of prescription.By systems analysis, determined best deformation rate and rational institution of prescription, improved the intensity of alloy.
Summary of the invention
The object of patent of the present invention is to provide a kind of method of the Al-Cu-Mg of raising alloy strength, it is characterized in that comprising the following steps:
Step 1, selects materials
Select Al-Cu-Mg alloy, the concrete content of described alloy is Al:Cu:Mg=94.09:4.31:1.60;
Step 2, thermal treatment
The selected alloy of step 1 is positioned over to solid solution in chamber type electric resistance furnace, the temperature of described chamber type electric resistance furnace is 490-500 ℃, solution time is 30-50min, it is the cold rolling of 10-50% that alloy after solution treatment is carried out to deformation rate, then the chamber type electric resistance furnace of putting into rapidly temperature and be 150-200 ℃ carries out the artificial aging that soaking time is 1-12h, both take out.
In step 2, the tensile strength of prepared Al-Cu-Mg alloy can reach 540MPa, yield strength can reach 375MPa, and unit elongation is 12.5%.The alloy of processing carries out one way tensile test, obtains its mechanical performance index.
The alloy of processing through this heat treating regime, the density in its inner dislocation and room increases, and for precipitated phase provides more nucleation site, thereby has accelerated the carrying out of timeliness, and the intensity of alloy is significantly improved.
Beneficial effect of the present invention is:
The heat treating regime that the present invention proposes, because can increase the density in the interior dislocation of alloy and room, is separated out more polymorphic nucleus position is provided for the precipitation of precipitated phase, thereby accelerated timeliness process, has played good strengthening effect.Through 40% predeformation and 12h artificial aging, process that the alloy ultimate tensile strength obtaining reaches 540MPa, yield strength reaches 375MPa, unit elongation is 12.5%.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.
Al-Cu-Mg alloy heat treating regime flow process comprises the following steps:
A. solution treatment: it is that the chamber type electric resistance furnace of 490-500 ℃ is incubated 30-50min, room temperature shrend afterwards that the Al-4.31Cu-1.60Mg alloy that is 2mm by thickness is put into temperature;
B. cold roller and deformed: the alloy after solution treatment is carried out to the cold rolling processing that deformation rate is 10%-50%; Can be 10%, 20%, 30%, 40% or 50%.
C. ageing treatment: after cold rolling, carry out rapidly the natural aging that artificial aging that 150-200 ℃ of soaking time is 1h-12h or room temperature are placed 36h.Soaking time can be 1h, 4h, 8h or 12h.
D. performance test: sheet material is processed into standard tensile sample and carries out one way tensile test, obtain its mechanical performance index.
Embodiment:
It is that the chamber type electric resistance furnace of 493 ℃ is incubated 30min that the Al-4.31Cu-1.60Mg alloy that is 2mm by thickness is put into temperature, carries out fast room temperature shrend; It is 40% cold rolling processing that alloy after solution treatment is carried out to deformation rate; The chamber type electric resistance furnace of immediately alloy being put into afterwards to temperature and be 190 ℃ carries out the artificial aging that soaking time is 12h.The alloy of handling well is carried out to one way tensile test by GB/T228-2002, measure its mechanical performance index.
Comparative example 1
It is that the chamber type electric resistance furnace of 493 ℃ is incubated 30min that the Al-4.31Cu-1.60Mg alloy that is 2mm by thickness is put into temperature, carries out fast room temperature shrend; After drying, carry out natural aging to basicly stable state.The alloy of handling well is carried out to one way tensile test by GB/T228-2002, measure its mechanical performance index.
Comparative example 2
It is that the chamber type electric resistance furnace of 493 ℃ is incubated 30min that the Al-4.31Cu-1.60Mg alloy that is 2mm by thickness is put into temperature, carries out fast room temperature shrend; It is 50% cold rolling processing that alloy after solution treatment is carried out to deformation rate; The chamber type electric resistance furnace of immediately alloy being put into afterwards to temperature and be 190 ℃ carries out the artificial aging that soaking time is 12h.The alloy of handling well is carried out to one way tensile test by GB/T228-2002, measure its mechanical performance index.
Comparative example 3
It is that the chamber type electric resistance furnace of 493 ℃ is incubated 30min that the Al-4.31Cu-1.60Mg alloy that is 2mm by thickness is put into temperature, carries out fast room temperature shrend; It is 40% cold rolling processing that alloy after solution treatment is carried out to deformation rate; Afterwards alloy is carried out placing under room temperature the natural aging of 36h.The alloy of handling well is carried out to one way tensile test by GB/T228-2002, measure its mechanical performance index.
The index of embodiment and comparative example 1-3 is as shown in the table:
From embodiment and comparative example 1, the heat treating regime that the present invention proposes contrasts the most frequently used solid solution of this type of alloy and adds natural aging treatment, can the in the situation that of the not obvious decline of alloy plasticity, greatly put forward heavy alloyed intensity.
From embodiment and comparative example 2,3, the heat treating regime optimal processing parameter that the present invention proposes is: the timeliness of deformation rate+190 of 493 ℃ of insulation 30min solid solution+40% ℃ insulation 12h.
Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (2)
1. improve a method for Al-Cu-Mg alloy strength, it is characterized in that comprising the following steps:
Step 1, selects materials
Select Al-Cu-Mg alloy, the concrete content of described alloy is Al:Cu:Mg=94.09:4.31:1.60;
Step 2, thermal treatment
The selected alloy of step 1 is positioned over to solid solution in chamber type electric resistance furnace, the temperature of described chamber type electric resistance furnace is 490-500 ℃, solution time is 30-50min, it is the cold rolling of 10-50% that alloy after solution treatment is carried out to deformation rate, then the chamber type electric resistance furnace of putting into rapidly temperature and be 150-200 ℃ carries out the artificial aging that soaking time is 1-12h, both take out.
2. a kind of method that improves Al-Cu-Mg alloy strength as claimed in claim 1, is characterized in that the tensile strength of prepared Al-Cu-Mg alloy in step 2 can reach 540MPa, yield strength can reach 375MPa, and unit elongation is 12.5%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310718945.2A CN103725998A (en) | 2013-12-20 | 2013-12-20 | Method for enhancing strength of Al-Cu-Mg alloy |
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| CN201310718945.2A CN103725998A (en) | 2013-12-20 | 2013-12-20 | Method for enhancing strength of Al-Cu-Mg alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734469A (en) * | 2016-02-23 | 2016-07-06 | 中南大学 | Method for improving damage tolerance performance of Al-Cu-Mg alloy |
| CN107151767A (en) * | 2017-01-20 | 2017-09-12 | 中国科学院金属研究所 | A kind of synchronous Strengthening and Toughening processing technology of Al Cu Mg alloys |
| CN107523768A (en) * | 2017-08-04 | 2017-12-29 | 大连热处理有限公司 | A kind of two-stage time effect processing method for aluminium alloy |
| CN107523767A (en) * | 2017-08-04 | 2017-12-29 | 大连热处理有限公司 | A kind of aging treatment method for aluminium alloy |
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| US4772342A (en) * | 1985-10-31 | 1988-09-20 | Bbc Brown, Boveri & Company, Limited | Wrought Al/Cu/Mg-type aluminum alloy of high strength in the temperature range between 0 and 250 degrees C. |
| EP0460809A1 (en) * | 1990-06-08 | 1991-12-11 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And | Method of treatment of metal matrix composites |
| JP2001303166A (en) * | 2000-04-26 | 2001-10-31 | Sky Alum Co Ltd | Aluminum alloy spacer material for hot press and its producing method |
| CN101082115A (en) * | 2007-05-25 | 2007-12-05 | 中南大学 | Treatment method for providing aluminum alloy with high thermal stability anti-fatigue microstructure |
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2013
- 2013-12-20 CN CN201310718945.2A patent/CN103725998A/en active Pending
Patent Citations (4)
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|---|---|---|---|---|
| US4772342A (en) * | 1985-10-31 | 1988-09-20 | Bbc Brown, Boveri & Company, Limited | Wrought Al/Cu/Mg-type aluminum alloy of high strength in the temperature range between 0 and 250 degrees C. |
| EP0460809A1 (en) * | 1990-06-08 | 1991-12-11 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And | Method of treatment of metal matrix composites |
| JP2001303166A (en) * | 2000-04-26 | 2001-10-31 | Sky Alum Co Ltd | Aluminum alloy spacer material for hot press and its producing method |
| CN101082115A (en) * | 2007-05-25 | 2007-12-05 | 中南大学 | Treatment method for providing aluminum alloy with high thermal stability anti-fatigue microstructure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734469A (en) * | 2016-02-23 | 2016-07-06 | 中南大学 | Method for improving damage tolerance performance of Al-Cu-Mg alloy |
| CN107151767A (en) * | 2017-01-20 | 2017-09-12 | 中国科学院金属研究所 | A kind of synchronous Strengthening and Toughening processing technology of Al Cu Mg alloys |
| CN107523768A (en) * | 2017-08-04 | 2017-12-29 | 大连热处理有限公司 | A kind of two-stage time effect processing method for aluminium alloy |
| CN107523767A (en) * | 2017-08-04 | 2017-12-29 | 大连热处理有限公司 | A kind of aging treatment method for aluminium alloy |
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Application publication date: 20140416 |