CN105239029B - Control the heat treatment method that the even dispersion of phase containing Mn separates out in Al Cu Mg Mn alloys - Google Patents
Control the heat treatment method that the even dispersion of phase containing Mn separates out in Al Cu Mg Mn alloys Download PDFInfo
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Abstract
The present invention relates to the heat treatment method that the even dispersion of phase containing Mn in a kind of control Al Cu Mg Mn alloys separates out, it is characterised in that comprises the following steps：（1）Al Cu Mg Mn alloy cast ingots with 10 ~ 400 DEG C/h average heating rate or are warming up to 410 ~ 470 DEG C through 1 ~ 40h from room temperature, and are incubated 0 ~ 30h；（2）Then Al Cu Mg Mn alloy cast ingots with 2.5 ~ 400 DEG C/h average heating rate or are warming up to 470 ~ 530 DEG C through 0.25 ~ 40h, and are incubated 1 ~ 60h；（3）Room temperature is cooled to after homogenization.The heat treatment method obtained by the present invention, can control the precipitation of the disperse phase containing Mn in Al Cu Mg Mn alloys well so that Mn disperse phases are uniformly distributed in the tissue；The heat treatment method of the present invention is widely used, and can be applied not only to aeronautical material, can also be applied to the heat treatment process of sheet material, section bar and 2XXX systems alloyed components etc..
Description
Technical field
The invention belongs to non-ferrous metal technical field, and in particular to phase containing Mn is equal in one kind control Al-Cu-Mg-Mn alloys
The heat treatment method of even disperse educt.
Background technology
Aluminium alloy has the characteristics that low-density, high specific strength, good toughness and corrosion resistance and is widely used in aviation, boat
My god, the field such as communications and transportation and machinery, electronics, building, have the function that in national economy and national defense construction irreplaceable.
Al-Cu-Mg-Mn alloys belong to 2XXX systems alloy category, are the Typical Representatives of Ultra-High Strength Aluminum Alloys, in Aeronautics and Astronautics, traffic
The fields such as transport are respectively provided with the prospect of being widely applied.How the performance such as fatigability of Al-Cu-Mg-Mn system alloy is further improved
Can etc., have great importance.
The domestic Technology for Heating Processing research on the alloy, how most of work regulates and controls main reinforcing precipitated phase if concentrating on
Separate out and Grain Boundary Precipitates are distributed, it is such as tired for how to regulate and control the distribution of the disperse phase containing Mn and to follow-up alloy property
The affecting laws research of labor performance is few.Therefore, the equally distributed matrix of disperse phase containing Mn how is obtained, is meaningful skill
Art problem.
The content of the invention
The heat treatment method that the even dispersion of phase containing Mn separates out in control Al-Cu-Mg-Mn alloys proposed by the present invention, it is intended to
The distribution of disperse phase containing Mn in the base is regulated and controled by suitable homogenization heat treatment method, finally gives a kind of disperse phase containing Mn
The uniform in the base, tissue of Dispersed precipitate.
The heat treatment method that the even dispersion of phase containing Mn separates out in control Al-Cu-Mg-Mn alloys proposed by the invention, bag
Include following steps：（1）The Al-Cu-Mg-Mn alloy cast ingots for casting to obtain to Al-Cu-Mg-Mn alloy meltings are handled, will
Al-Cu-Mg-Mn alloy cast ingots with 10 ~ 400 DEG C/h average heating rate or are warming up to 410 ~ 470 DEG C from room temperature through 1 ~ 40h,
And it is incubated 0 ~ 30h；（2）Then by Al-Cu-Mg-Mn alloy cast ingots with 2.5 ~ 400 DEG C/h average heating rate or through 0.25 ~
40h is warming up to 470 ~ 530 DEG C, and is incubated 1 ~ 60h；（3）Room temperature is cooled to after homogenization.
Further, the heat treatment method that the even dispersion of phase containing Mn separates out in above-mentioned control Al-Cu-Mg-Mn alloys, its
In：The Al-Cu-Mg-Mn alloys include other 2XXX systems alloy of AA2524, AA2024 and the element containing Mn.
Further, the heat treatment method that the even dispersion of phase containing Mn separates out in above-mentioned control Al-Cu-Mg-Mn alloys, its
In：The step（3）In the type of cooling cooled down for water cooling or air.
Yet further, the heat treatment method that the even dispersion of phase containing Mn separates out in above-mentioned control Al-Cu-Mg-Mn alloys, its
In：The step（3）In cooldown rate> 5℃/h.
The heat treatment method that the even dispersion of phase containing Mn separates out in control Al-Cu-Mg-Mn alloys proposed by the present invention, passes through
The distribution of suitable homogenization heat treatment method regulation and control disperse phase containing Mn in the base, finally gives a kind of disperse phase containing Mn in base
The uniform, tissue of Dispersed precipitate in body.The tissue is advantageous to control the recrystallized structure of alloy, is advantageous to improve the fatigue of alloy
Performance etc..And heat treatment method of the invention is widely used, can be applied not only to aeronautical material, at the same can be applied to sheet material,
The heat treatment process of section bar and 2XXX systems alloyed components etc..
Brief description of the drawings
Fig. 1 is the i.e. scanning electron microscopy of embodiment 1 after alloy carries out 450 DEG C × 5h+498 DEG C × 30h Water Quenchings
Figure；
Fig. 2 is the i.e. scanning electron microscopy of embodiment 2 after alloy carries out 450 DEG C × 10h+498 DEG C × 30h Water Quenchings
Figure；
Fig. 3 is the i.e. scanning electron microscopy of embodiment 3 after alloy carries out 460 DEG C × 5h+498 DEG C × 30h Water Quenchings
Figure；
Fig. 4 is the i.e. scanning electron microscopy of comparative example 1 after alloy carries out 498 DEG C × 30h Water Quenchings；
Fig. 5 is i.e. EDAX results of comparative example 2 after alloy carries out 400 DEG C × 5h+498 DEG C × 30h Water Quenchings；
Fig. 6 is the i.e. scanning electron microscopy of comparative example 2 after alloy carries out 400 DEG C × 5h+498 DEG C × 30h Water Quenchings
Figure.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment and comparative example, the embodiment of the present invention is described in further detail, with
Technical solution of the present invention is set to be more readily understood and grasp.
The heat treatment method that the even dispersion of phase containing Mn separates out in present invention control Al-Cu-Mg-Mn alloys, is carrying out hot place
Dispensing melting first is carried out according to alloy component range before reason, casting obtains required ingot casting, comprised the following steps：（1）To Al-Cu-
The Al-Cu-Mg-Mn alloy cast ingots that Mg-Mn alloy meltings cast to obtain are handled, by Al-Cu-Mg-Mn alloy cast ingots from room
Temperature is warming up to 410 ~ 470 DEG C with 10 ~ 400 DEG C/h average heating rate or through 1 ~ 40h, and is incubated 0 ~ 30h；（2）Then by Al-
Cu-Mg-Mn alloy cast ingots are warming up to 470 ~ 530 DEG C with 2.5 ~ 400 DEG C/h average heating rate or through 0.25 ~ 40h, and are incubated
1~60h；（3）Room temperature is cooled to after homogenization.The Al-Cu-Mg-Mn alloys ranges include AA2524, AA2024 and contained
Other 2XXX systems alloy of Mn elements, the i.e. present invention are applied to all Al-Cu-Mg-Mn alloys.Through step（2）It is resulting afterwards
Phase containing Mn in Al-Cu-Mg-Mn alloy structures can uniformly, the distribution of disperse.The step（3）In the type of cooling be water
Cooling or air cooling, cooldown rate> 5℃/h.
Embodiment 1
1）Al alloy component is by percentage to the quality：Cu4.28wt.%, Mg1.25wt.%, Mn0.57wt.%,
Ti0.03wt.%, Fe≤0.08wt.%, Si≤0.08wt.%, surplus Al.
2）According to 1）Middle alloying element proportioning carries out dispensing melting, and casting obtains required ingot casting, ingot casting is homogenized
Heat treatment：From room temperature with 40 DEG C/h average heating rate or through about 10.6h be warming up to 450 DEG C insulation 5h, then proceed to 40
DEG C/h average heating rate or it is warming up to 498 DEG C of insulation 30h, water cooling to room temperature through about 1.2h.
Embodiment 2
1）Al alloy component is by percentage to the quality：Cu4.28wt.%, Mg1.25wt.%, Mn0.57wt.%,
Ti0.03wt.%, Fe≤0.08wt.%, Si≤0.08wt.%, surplus Al.
2）According to 1）Middle alloying element proportioning carries out dispensing melting, and casting obtains required ingot casting, ingot casting is homogenized
Heat treatment：From room temperature with 30 DEG C/h average heating rate or through about 14.2h be warming up to 450 DEG C insulation 10h, then proceed to 30
DEG C/h average heating rate or it is warming up to 498 DEG C of insulation 30h, water cooling to room temperature through about 1.6h.
Embodiment 3
1）Al alloy component is by percentage to the quality：Cu4.28wt.%, Mg1.25wt.%, Mn0.57wt.%,
Ti0.03wt.%, Fe≤0.08wt.%, Si≤0.08wt.%, surplus Al.
2）According to 1）Middle alloying element proportioning carries out dispensing melting, and casting obtains required ingot casting, ingot casting is homogenized
Heat treatment：From room temperature with 40 DEG C/h average heating rate or through about 11h be warming up to 460 DEG C insulation 5h, then proceed to 40 DEG C/
H average heating rate is warming up to 498 DEG C of insulation 30h, water cooling to room temperature through about 1h.
Comparative example 1
1）Al alloy component is by percentage to the quality：Cu4.28wt.%, Mg1.25wt.%, Mn0.57 wt.%,
Ti0.03wt.%, Fe≤0.08wt.%, Si≤0.08wt.%, surplus Al.
2）According to 1）Middle alloying element proportioning carries out dispensing melting, and casting obtains required ingot casting, ingot casting is homogenized
Heat treatment：From room temperature with 40 DEG C/h average heating rate or through about 11.8h be warming up to 498 DEG C insulation 30h, water cooling to room temperature.
Comparative example 2
1）Al alloy component is by percentage to the quality：Cu4.28wt.%, Mg1.25wt.%, Mn0.57 wt.%,
Ti0.03wt.%, Fe≤0.08wt.%, Si≤0.08wt.%, surplus Al.
2）According to 1）Middle alloying element proportioning carries out dispensing melting, and casting obtains required ingot casting, ingot casting is homogenized
Heat treatment：From room temperature with 40 DEG C/h average heating rate or through about 9.4h be warming up to 400 DEG C insulation 5h, then proceed to 40
DEG C/h average heating rate or it is warming up to 498 DEG C of insulation 30h, water cooling to room temperature through about 2.5h.
Table 1 illustrates the measurements resistivity of alloy in embodiment and comparative example, and table 2 illustrates embodiment and comparative example
In disperse phase containing Mn be uniformly distributed region and the distributed pole non-uniform areas area fraction statistical result of disperse phase containing Mn, table 3 is illustrated
The mole percent of A, B, C 3 points of each material compositions in Fig. 5.Fig. 5 illustrates disperse phase EDAX results in comparative example 2,
Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 6 illustrate the distributed mutually of disperse containing Mn SEM organization charts in embodiment and comparative example.
Experimental result is as shown in table 2, and the distributed pole non-uniform areas of disperse phase containing Mn is not present in embodiment 1, example 2, example 3,
Its area fraction is 0%, and the distributed pole non-uniform areas of disperse phase containing Mn area fraction is then 14.2% in comparative example 1, in comparative example 2
The distributed pole non-uniform areas of disperse phase containing Mn area fraction is 14.9%, it follows that the present invention is by rationally controlling heating speed
Rate, first order homogenization holding temperature and soaking time, second level homogenization holding temperature and soaking time, can effectively be adjusted
The distribution of the phase containing Mn in Al-Cu-Mg-Mn alloys is controlled, makes containing the Mn phase uniform, distribution of disperse in the tissue.Meanwhile by the institute of table 1
Show, resistance alloys rate value is respectively 5.9,6.0,6.0 μ Ω × cm under embodiment 1, embodiment 2, the processing state of embodiment 3, is compared
Resistance alloys rate value is 5.9 μ Ω × cm under the processing state of example 1, under the processing state of comparative example 2 resistance alloys rate value be 6.0 μ Ω ×
Cm, it follows that the resistance alloys rate after heat treatment method of the present invention processing changes very little, i.e., heat treatment method of the present invention
It is smaller for the solid solution capacity of each alloying element in the base and amount of precipitation influence, simply regulate and control disperse phase containing Mn in the tissue
Distributional pattern.
Experimental result as shown in Figure 1, Figure 2, Figure 3 shows, alloy carry out 450 DEG C × 5h+498 DEG C × 30h, 450 DEG C × 10h+498
DEG C × 30h, after 460 DEG C × 5h+498 DEG C × 30h Water Quenchings, i.e., after embodiment 1, embodiment 2, the processing of embodiment 3, alloy
Each region disperse phase containing Mn is uniformly distributed；As shown in figure 4, alloy carry out 498 DEG C × 30h Water Quenchings after, i.e., through comparative example 1 at
After reason, alloy was both evenly distributed region in the presence of disperse phase containing Mn, and there is also the skewness of disperse phase containing Mn region；Such as Fig. 6 institutes
Show, after alloy carries out 400 DEG C × 5h+498 DEG C × 30h Water Quenchings, i.e., after the processing of comparative example 2, alloy had both been present containing Mn more
Dephasing is evenly distributed region, and there is also the skewness of disperse phase containing Mn region.In comparative example 2, disperse phase containing Mn is evenly distributed
Its energy spectrum analysis of region is as shown in Fig. 5 left figures, it is seen that disperse phase containing Mn is evenly distributed；In comparative example 2, the distributed mutually of disperse containing Mn is not
Its energy spectrum analysis of homogeneous area is as shown in Fig. 5 right figures, it is seen that the skewness of disperse phase containing Mn.A points, B points, each thing of C points in Fig. 5
The mole percent of matter composition is as shown in table 3, and the mole percent of A point Mn elements is the Mole percent of 1.5%, B point Mn elements
Number is that the mole percent of 0.8%, C point Mn elements is 1.9%, the mole percents of each point Mn elements difference.To sum up may be used
Know, by embodiment 1, embodiment 2, embodiment 3 the controllable Al-4.28Cu-1.25Mg-0.57Mn- of heat treatment method
The precipitation of 0.03Ti alloys disperse phase containing Mn, make disperse phase containing Mn in the tissue uniformly, the precipitation of disperse.
Certainly, it the above is only the concrete application example of the present invention, protection scope of the present invention be not limited in any way.It is all
The technical scheme formed using equivalent transformation or equivalent replacement, all fall within rights protection scope of the present invention.
Resistance alloys rate value under the embodiment of table 1 and comparative example processing state
| State | Resistivity, μ Ω × cm |
| Embodiment 1 | 5.9 |
| Embodiment 2 | 6.0 |
| Embodiment 3 | 6.0 |
| Comparative example 1 | 5.9 |
| Comparative example 2 | 6.0 |
The disperse phase containing Mn of table 2 is uniformly distributed region and tied with the distributed pole non-uniform areas of disperse phase containing Mn area fraction statistics
Fruit
| State | Disperse phase containing Mn is uniformly distributed region area fraction/% | The distributed pole non-uniform areas of disperse phase containing Mn area fraction/% |
| Embodiment 1 | 100 | 0 |
| Embodiment 2 | 100 | 0 |
| Embodiment 3 | 100 | 0 |
| Comparative example 1 | 85.8 | 14.2 |
| Comparative example 2 | 85.1 | 14.9 |
The mole percent of 3 points of each material compositions of A, B, C in the Fig. 5 of table 3
Claims (4)
1. control the heat treatment method that the even dispersion of phase containing Mn separates out in Al-Cu-Mg-Mn alloys, it is characterised in that including following
Step：（1）The Al-Cu-Mg-Mn alloy cast ingots for casting to obtain to Al-Cu-Mg-Mn alloy meltings are handled, by Al-Cu-
Mg-Mn alloy cast ingots with 10 ~ 400 DEG C/h average heating rate or are warming up to 410 ~ 460 DEG C from room temperature through 1 ~ 40h, and are incubated 5
~30h；（2）Then by Al-Cu-Mg-Mn alloy cast ingots with 2.5 ~ 400 DEG C/h average heating rate or through 0.25 ~ 40h heatings
To 470 ~ 498 DEG C, and it is incubated 1 ~ 60h；（3）Room temperature is cooled to after homogenization.
2. the heat treatment method that the even dispersion of phase containing Mn separates out in control Al-Cu-Mg-Mn alloys as claimed in claim 1, its
It is characterised by：The Al-Cu-Mg-Mn alloys include other 2XXX systems alloy of AA2524, AA2024 and the element containing Mn.
3. the heat treatment method that the even dispersion of phase containing Mn separates out in control Al-Cu-Mg-Mn alloys as claimed in claim 1, its
It is characterised by：The step（3）In the type of cooling cooled down for water cooling or air.
4. the heat treatment method that the even dispersion of phase containing Mn separates out in control Al-Cu-Mg-Mn alloys as claimed in claim 1, its
It is characterised by：The step（3）In cooldown rate> 5℃/h.
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| CN109266923A (en) * | 2018-11-28 | 2019-01-25 | 中铝材料应用研究院有限公司 | A kind of high-intensitive, high fatigue life Al-Cu-Mg-Si-Mn line aluminium alloy and its processing method |
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| CN101748318A (en) * | 2008-12-02 | 2010-06-23 | 苏州有色金属研究院有限公司 | 2xxx series aluminum alloy with high strength and high plasticity and manufacturing method thereof |
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