CN105543740A - Heat processing technology for improving corrosion resistant performance of aluminum alloy - Google Patents
Heat processing technology for improving corrosion resistant performance of aluminum alloy Download PDFInfo
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- CN105543740A CN105543740A CN201510922029.XA CN201510922029A CN105543740A CN 105543740 A CN105543740 A CN 105543740A CN 201510922029 A CN201510922029 A CN 201510922029A CN 105543740 A CN105543740 A CN 105543740A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 141
- 230000007797 corrosion Effects 0.000 title abstract description 29
- 238000005260 corrosion Methods 0.000 title abstract description 29
- 238000005516 engineering process Methods 0.000 title abstract description 4
- 238000012545 processing Methods 0.000 title abstract description 4
- 230000032683 aging Effects 0.000 claims abstract description 63
- 238000010791 quenching Methods 0.000 claims abstract description 47
- 239000000243 solution Substances 0.000 claims description 59
- 238000000034 method Methods 0.000 claims description 43
- 238000007669 thermal treatment Methods 0.000 claims description 27
- 230000001550 time effect Effects 0.000 claims description 27
- 230000003628 erosive effect Effects 0.000 claims description 20
- 239000012266 salt solution Substances 0.000 claims description 19
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 13
- 239000012267 brine Substances 0.000 claims description 13
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 13
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 12
- 230000000171 quenching effect Effects 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 22
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 208000016261 weight loss Diseases 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 230000002180 anti-stress Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Conductive Materials (AREA)
- Heat Treatment Of Articles (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a heat processing technology for improving the corrosion resistant performance of aluminum alloy, including solution treatment, quenching treatment and aging treatment, wherein the aging treatment sequentially includes primary aging treatment and secondary aging treatment; in the primary aging treatment, aluminum alloy after quenching treatment is treated for 8 hours at the temperature of 108-112 DEG C; and in the secondary aging treatment, the aluminum alloy is treated for 10 hours at the temperature of 133-137 DEG C. The heat processing technology has the advantages of improving the corrosion resistant performance of the aluminum alloy and ensuring the hardness and the tensile strength of the aluminum alloy.
Description
Technical field
The present invention relates to metal heat treatmet field.More particularly, the present invention relates to a kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance.
Background technology
Aluminium alloy density is low, but strength ratio is higher, close to or exceed high-quality steel, plasticity is good, can be processed into various section bar, has excellent electroconductibility, thermal conductivity and corrosion stability, industrially widely uses, and usage quantity is only second to steel.Some aluminium alloys can adopt thermal treatment to obtain good mechanical property, physicals and corrosion resistance.
Although aluminium alloy has good mechanical property, but widely using along with aluminium alloy, it, under arms in process, is corroded unavoidably, causes it to lose efficacy.Affect a lot of because have of corrosion of aluminium alloy susceptibility, such as outside atmosphere, surface treatment, metallurgy factor and thermal treatment process etc.Wherein thermal treatment process is very important influence factor, and to formulate rational heat treating regime to improve the anticorrosion stress-resistant performance of aluminium alloy be also study hotspot all the time.Traditional method carries out plating anticorrosive again by after heat treatment of workpieces, and technique is comparatively complicated, and coating easily comes off.
Why thermal treatment process can improve the corrosion resistance nature of aluminium alloy, is that the change of these microtextures can make corrosion susceptibility change because there occurs change in the microtexture of heat treatment process interalloy.Common thermal treatment process comprises solution treatment, ageing treatment etc., and wherein the corrosion susceptibility impact of system of ageing treatment alloy is larger.Aluminium alloy is after peak value ageing treatment, and intra-die separates out half coherence GP district of small and dispersed, and crystal boundary has precipitated phase, although this microtexture makes alloy have the highest intensity, counter stress corrosion is very responsive.Three-step aging by contrast, especially regression and re-ageing heat treating regime can keep the tiny GP district of the intracrystalline of peak value timeliness, allow the precipitated phase alligatoring of crystal boundary simultaneously, this microtexture makes alloy maintain the intensity of peak aged, also improve the anti-stress corrosion performance of alloy simultaneously, but this heat treating regime processing parameter is more complicated, is difficult to precisely control and operation, has to be optimized in engineering reality.Comparatively speaking, the Wetted constructures code in two-stage time effect is simpler than three-step aging, has both the alligatoring effect that three-step aging makes Grain Boundary Precipitates simultaneously, and alloy therefore can be made to have good drag corrosive nature.
Two-stage time effect heat treating regime obtains research very early, but considerably reduces intensity because of it, and wastes energy consumption, in when therefore not yet having good heat treating regime really can be applied to production at present.Therefore, design a kind of rational two-stage time effect heat treating regime and become the study hotspot improving corrosion resistance of aluminum alloy.
Summary of the invention
An object of the present invention is to solve at least the problems referred to above, and the advantage will illustrated at least is below provided.
A further object of the invention is to provide a kind of thermal treatment process of aluminium alloy, improves the Corrosion Protection of aluminium alloy, ensure that hardness and the tensile strength of aluminium alloy simultaneously.
In order to realize according to these objects of the present invention and other advantage, provide a kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 108 DEG C-112 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 133 DEG C-137 DEG C.
Preferably, described aluminium alloy comprises the component of following mass percent: the Zn of Cu, 0%-0.05% of Mn, 0%-0.1% of Fe, 0%-0.05% of Ti, 0%-0.12% of Mg, 0%-0.2% of Si, 0.30%-0.45% of 6.5%-7.5%, and surplus is Al.
Preferably, the process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 80-110g/L.
Preferably, described solution treatment is specially: aluminium alloy is processed 50-70min at 490 DEG C-540 DEG C.
Preferably, after the solution treatment of described aluminium alloy has processed 20min under 490 DEG C of-540 DEG C of conditions, led to direct current to the aluminium alloy in solution treatment, continued to process 30-50min at 490 DEG C-540 DEG C; Wherein, the direct current passing into aluminium alloy is that staged rises, and the minimum electrical current density passed into is 1A/cm
2, the maximum current density passed into is 10A/cm
2.
Preferably, after aluminium alloy salt solution at room temperature processes 30-40min, then be the sodium bromide solution quench treatment aluminium alloy 30-40min of 2% with massfraction, treatment temp is-5 DEG C.
The present invention at least comprises following beneficial effect: aluminium alloy of the present invention first carries out solution treatment, that disperse phase in aluminium alloy is partly dissolved, and then carry out quench treatment and ageing treatment, improve its corrosion resistance, ensure that hardness and the tensile strength of aluminium alloy simultaneously.
Part is embodied by explanation below by other advantage of the present invention, target and feature, part also will by research and practice of the present invention by those skilled in the art is understood.
Accompanying drawing explanation
Fig. 1 is the weight-loss corrosion rate diagram of the aluminium alloy of embodiments of the invention 3 and comparative example 5;
Fig. 2 is the microscope mirror figure below after the corrosion of the embodiment of the present invention 3;
Fig. 3 is the microscope mirror figure below after the corrosion of comparative example 5 of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
Embodiment 1
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 112 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 137 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 7.5%, the Mg of 0.45%, 0.2% Ti, the Fe of 0.12%, Mn, the Cu of 0.1%, the Zn of 0.05% of 0.05%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 110g/L.
Described solution treatment is specially: aluminium alloy is processed 70min at 540 DEG C.
Embodiment 2
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 108 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 133 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 6.5%, the Mg of 0.30%, and surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 80g/L.
Described solution treatment is specially: aluminium alloy is processed 50min at 490 DEG C.
Embodiment 3
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 110 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 135 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 7%, the Mg of 0.4%, 0.1% Ti, the Fe of 0.1%, Mn, the Cu of 0.05%, the Zn of 0.02% of 0.02%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 100g/L.
Described solution treatment is specially: aluminium alloy is processed 60min at 520 DEG C.
Embodiment 4
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 108 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 133 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 6.5%, the Mg of 0.30%, and surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 80g/L.After aluminium alloy salt solution at room temperature processes 30min, then be the sodium bromide solution quench treatment aluminium alloy 30min of 2% with massfraction, treatment temp is-5 DEG C.
Described solution treatment is specially: after the solution treatment of described aluminium alloy has processed 20min under 490 DEG C of conditions, led to direct current, continue to process 30min at 490 DEG C to the aluminium alloy in solution treatment; Wherein, the direct current passing into aluminium alloy is that staged rises, and the minimum electrical current density passed into is 1A/cm
2, the maximum current density passed into is 10A/cm
2.
Embodiment 5
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 112 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 137 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 7.5%, the Mg of 0.45%, 0.2% Ti, the Fe of 0.12%, Mn, the Cu of 0.1%, the Zn of 0.05% of 0.05%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 110g/L.After aluminium alloy salt solution at room temperature processes 40min, then be the sodium bromide solution quench treatment aluminium alloy 40min of 2% with massfraction, treatment temp is-5 DEG C.
Described solution treatment is specially: after the solution treatment of described aluminium alloy has processed 20min under 540 DEG C of conditions, led to direct current, continue to process 50min at 540 DEG C to the aluminium alloy in solution treatment; Wherein, the direct current passing into aluminium alloy is that staged rises, and the minimum electrical current density passed into is 1A/cm
2, the maximum current density passed into is 10A/cm
2.
Embodiment 6
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 110 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 135 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 7%, the Mg of 0.4%, 0.1% Ti, the Fe of 0.1%, Mn, the Cu of 0.05%, the Zn of 0.02% of 0.02%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 100g/L.After aluminium alloy salt solution at room temperature processes 35min, then be the sodium bromide solution quench treatment aluminium alloy 33min of 2% with massfraction, treatment temp is-5 DEG C.
Described solution treatment is specially: after the solution treatment of described aluminium alloy has processed 20min under 520 DEG C of conditions, led to direct current, continue to process 40min at 520 DEG C to the aluminium alloy in solution treatment; Wherein, the direct current passing into aluminium alloy is that staged rises, and the minimum electrical current density passed into is 1A/cm
2, the maximum current density passed into is 10A/cm
2.
Comparative example 1
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 110 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 8 hours at 135 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 7%, the Mg of 0.4%, 0.1% Ti, the Fe of 0.1%, Mn, the Cu of 0.05%, the Zn of 0.02% of 0.02%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 100g/L.
Described solution treatment is specially: aluminium alloy is processed 60min at 500 DEG C.
Comparative example 2
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 110 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 14 hours at 135 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 7%, the Mg of 0.4%, 0.1% Ti, the Fe of 0.1%, Mn, the Cu of 0.05%, the Zn of 0.02% of 0.02%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 100g/L.
Described solution treatment is specially: aluminium alloy is processed 60min at 500 DEG C.
Comparative example 3
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 110 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 135 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 7%, the Mg of 0.4%, 0.1% Ti, the Fe of 0.1%, Mn, the Cu of 0.05%, the Zn of 0.02% of 0.02%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 100g/L.After aluminium alloy salt solution at room temperature processes 35min, then be the sodium bromide solution quench treatment aluminium alloy 33min of 2% with massfraction, treatment temp is-5 DEG C.
Described solution treatment is specially: aluminium alloy is processed 60min at 500 DEG C.
Comparative example 4
A kind of thermal treatment process improving corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 110 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 135 DEG C.
Described aluminium alloy comprises the component of following mass percent: the Si of 7%, the Mg of 0.4%, 0.1% Ti, the Fe of 0.1%, Mn, the Cu of 0.05%, the Zn of 0.02% of 0.02%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 100g/L.
Described solution treatment is specially: after the solution treatment of described aluminium alloy has processed 20min under 520 DEG C of conditions, led to direct current, continue to process 40min at 520 DEG C to the aluminium alloy in solution treatment; Wherein, the direct current passing into aluminium alloy is that staged rises, and the minimum electrical current density passed into is 1A/cm
2, the maximum current density passed into is 10A/cm
2.
Comparative example 5
Improve a thermal treatment process for corrosive protection of aluminium alloy erosion performance, comprise solution treatment and quench treatment.
Described aluminium alloy comprises the component of following mass percent: the Si of 7%, the Mg of 0.4%, 0.1% Ti, the Fe of 0.1%, Mn, the Cu of 0.05%, the Zn of 0.02% of 0.02%, surplus is Al.
The process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 100g/L.
Described solution treatment is specially: aluminium alloy is processed 60min at 500 DEG C.
Simultaneous test:
Table 1. aging strengthening model system
| Group | Thermal treatment | Aging strengthening model degree |
| Embodiment 3 | Overaging 1 | 110℃/8h+135℃/10h |
| Comparative example 1 | Peak timeliness | 110℃/8h+135℃/8h |
| Comparative example 2 | Overaging 2 | 110℃/8h+135℃/14h |
The result that comparative example 1 obtains is peak timeliness: the aluminium alloy that obtains obtain hardness and tensile strength all higher, but elongation is lower, and corrosive nature is not good enough.
The result that embodiment 3 obtains is overaging 1: the aluminium alloy obtained keeps higher intensity, and plasticity increases compared to comparative example 1 simultaneously, has good corrosion resistance simultaneously.
The result that comparative example 2 obtains is overaging 2: although the aluminium alloy plasticity obtained and corrosion resistance increase compared to comparative example 1, the intensity of aluminium alloy reduces greatly, loses the performance characteristics of cast aluminium alloy.
Mechanical property tests:
The aluminium alloy of embodiment 3, embodiment 6, comparative example 3, comparative example 4 and comparative example 5 is tested its mechanical property, the results are shown in Table 2.
| Group | Tensile strength/MPa | Yield strength/MPa | Unit elongation/% |
| Embodiment 3 | 234.6 | 226.6 | 9.87 |
| Embodiment 6 | 251.3 | 244.7 | 10.55 |
| Comparative example 3 | 235.5 | 243.2 | 10.13 |
| Comparative example 4 | 250.2 | 230.7 | 9.93 |
| Comparative example 5 | 190.43 | 182.32 | 10.46 |
Weight-loss corrosion test experiments:
Experimental procedure: the aluminium alloy of embodiment 3 and comparative example 5 is tested its average corrosion performance, adopt constant temperature infusion method corrosion sample, corrosive medium is 3%NaCl (mass percent) and 0.15%H
2o
2(atomic percent) mixed aqueous solution, weighing every 15h sampling cleaning, once, the corrosive medium simultaneously more renewed continues insulation and corrodes also record data, and whole corrosion process maintenance temperature is 40 DEG C, the corrosion time length is 60h, with average corrosion rate (g/ (m
2h) its corrosion resistance nature) is characterized, the results are shown in Figure 1, Fig. 2 and Fig. 3, as shown in Figure 1, the aluminium alloy of embodiment 3 is compared to comparative example 5, and average corrosion rate obviously reduces, from Fig. 2 and Fig. 3, the aluminum alloy surface corrosion pit of embodiment 3 obviously will lack, without obvious concentration phenomenon, the corrosion of aluminium alloy hole quantity of comparative example 5 is more, and Relatively centralized.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore not deviate from power embodiment.
Claims (6)
1. one kind is improved the thermal treatment process of corrosive protection of aluminium alloy erosion performance, comprise solution treatment, quench treatment and ageing treatment, it is characterized in that, described ageing treatment comprises one-level ageing treatment and secondary time effect process successively, described one-level ageing treatment is that aluminium alloy good for quench treatment is processed 8 hours at 108 DEG C-112 DEG C, and described secondary time effect is treated to and aluminium alloy is processed 10 hours at 133 DEG C-137 DEG C.
2. the thermal treatment process improving corrosive protection of aluminium alloy erosion performance as claimed in claim 1, it is characterized in that, described aluminium alloy comprises the component of following mass percent: the Zn of Cu, 0%-0.05% of Mn, 0%-0.1% of Fe, 0%-0.05% of Ti, 0%-0.12% of Mg, 0%-0.2% of Si, 0.30%-0.45% of 6.5%-7.5%, and surplus is Al.
3. the thermal treatment process improving corrosive protection of aluminium alloy erosion performance as claimed in claim 1, it is characterized in that, the process of described quench treatment is that the aluminium alloy that solution treatment is good is at room temperature used brine treatment, and in described salt solution, the content of sodium-chlor is 80-110g/L.
4. the thermal treatment process improving corrosive protection of aluminium alloy erosion performance as claimed in claim 1, it is characterized in that, described solution treatment is specially: aluminium alloy is processed 50-70min at 490 DEG C-540 DEG C.
5. the thermal treatment process improving corrosive protection of aluminium alloy erosion performance as claimed in claim 4, it is characterized in that, after the solution treatment of described aluminium alloy has processed 20min under 490 DEG C of-540 DEG C of conditions, lead to direct current to the aluminium alloy in solution treatment, continued to process 30-50min at 490 DEG C-540 DEG C; Wherein, the direct current passing into aluminium alloy is that staged rises, and the minimum electrical current density passed into is 1A/cm
2, the maximum current density passed into is 10A/cm
2.
6. the thermal treatment process improving corrosive protection of aluminium alloy erosion performance as claimed in claim 3, it is characterized in that, after aluminium alloy salt solution at room temperature processes 30-40min, then be the sodium bromide solution quench treatment aluminium alloy 30-40min of 2% with massfraction, treatment temp is-5 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521370A (en) * | 2016-09-20 | 2017-03-22 | 池州市安安精工铝业有限公司 | High-precision aluminum alloy aging heat treatment process |
| CN108118273A (en) * | 2017-12-11 | 2018-06-05 | 中南大学 | A kind of method for improving aluminium alloy corrosion resistance |
| CN108398320A (en) * | 2018-01-24 | 2018-08-14 | 航天科工防御技术研究试验中心 | A kind of measurement method of wrought aluminium alloy tensile stress etching |
| CN108977739A (en) * | 2018-08-07 | 2018-12-11 | 中南大学 | Aging treatment process that is a kind of while improving intensity of aluminum alloy and anti-stress corrosion performance |
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| CN108118273B (en) * | 2017-12-11 | 2019-11-12 | 中南大学 | A method of improving aluminium alloy corrosion resistance |
| CN108398320A (en) * | 2018-01-24 | 2018-08-14 | 航天科工防御技术研究试验中心 | A kind of measurement method of wrought aluminium alloy tensile stress etching |
| CN108977739A (en) * | 2018-08-07 | 2018-12-11 | 中南大学 | Aging treatment process that is a kind of while improving intensity of aluminum alloy and anti-stress corrosion performance |
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Application publication date: 20160504 Assignee: Guangxi Baixin New Materials Co.,Ltd. Assignor: BAISE University Contract record no.: X2023980046196 Denomination of invention: Heat treatment process for improving the corrosion resistance of aluminum alloys Granted publication date: 20171003 License type: Common License Record date: 20231108 |
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Effective date of registration: 20231123 Address after: No. 10 Huashihu Road, Yangchenghu Town, Xiangcheng District, Suzhou City, Jiangsu Province, 215100 Patentee after: SUZHOU XIAODONG METAL PRODUCTS Co.,Ltd. Address before: No.21 Zhongshan 2nd Road, Youjiang District, Baise City, Guangxi Zhuang Autonomous Region Patentee before: BAISE University |