CN105483460A - Aluminum alloy with anti-fatigue performance and heat treatment method of aluminum alloy - Google Patents
Aluminum alloy with anti-fatigue performance and heat treatment method of aluminum alloy Download PDFInfo
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- CN105483460A CN105483460A CN201510843943.5A CN201510843943A CN105483460A CN 105483460 A CN105483460 A CN 105483460A CN 201510843943 A CN201510843943 A CN 201510843943A CN 105483460 A CN105483460 A CN 105483460A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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
-
- 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
- C22F1/047—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 magnesium as the next major constituent
-
- 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
- C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
Abstract
The invention relates to the technical field of aluminum alloys and heat treatment technologies of the aluminum alloys, particularly to an aluminum alloy with anti-fatigue performance and a heat treatment method of the aluminum alloy. Mass percentages of components of raw materials of the aluminum alloy are designed, so that all components can interact mutually, and the content of impurity elements is reduced; and the heat treatment process for the aluminum alloy is adopted, so that the strength, the toughness and the corrosion resistance of the obtained aluminum alloy are all excellent, and the anti-fatigue performance and the quality of the aluminum alloy are improved.
Description
Technical field
The present invention relates to aluminium alloy and technical field of heat treatment thereof, especially a kind of aluminium alloy and heat treating method thereof with anti-fatigue performance.
Background technology
Aluminium is the second largest metalloid material that output is only second to iron and steel, and because performance is good, purposes is wide, and requirement is large, and cost recovery is low, is described as " omnipotent metal ".Statistics shows: have 113 industries to use aluminum products in existing 124 industries of China, interrelationship between industries is up to 91%, and thus aluminium industry is one of mainstay starting material industry of national sustained economic development.
At present at the widely used high strength alumin ium alloy of aerospace field mainly 7xxx series A l-Zn-Mg-Cu and 2xxx series A l-Cu-Mg aluminium alloy.Although 7xxx series alloys intensity is very high, obvious stress corrosion crack is had to be inclined to, thus its component application potentiality and being very limited work-ing life.The strength ratio 7xxx series alloys of 2xxx series alloys is low, but thermotolerance, fatigue characteristic, particularly fatigue crack extendability is all good than 7xxx series; But due to 2xxx series alloys corrosion resistance nature still relatively poor, directly affect the performance of aluminum alloy junction component, shorten its work-ing life.
Current correlative study all launches round 7xxx series and 2xxx series alloy, mainly through the mode of alloying and optimization of Heat Treatment Process, while raising intensity, take into account corrosion resistance nature as far as possible, but all fundamentally do not reach obdurability and corrosion proof unification; And due to alloying element content raising, also can cost of alloy be increased, poor processability.
Visible, alloy product of the prior art needs to improve and development.
Summary of the invention
In order to solve the above-mentioned technical problem existed in prior art, the invention provides a kind of aluminium alloy and the heat treating method thereof with anti-fatigue performance.
Be achieved particular by following technical scheme:
There is an aluminium alloy for anti-fatigue performance, comprise following component by mass percentage: Si:0.57 ~ 0.98%, Fe:0.35 ~ 0.41%, Mn:0.45 ~ 0.63%, Ti:0.06-0.08%, Cu:0.1-0.4%, Mg:0.7-1%, Cr:0.1-0.14%, Zr:0.01-0.2%, Zn:0.1-0.2%, Sc:0.03-0.06%, As:0.008-0.009%, S:0.0001%, surplus is aluminium and inevitable impurity.
Described component, it is Si:0.7%, Fe:0.4% by mass percentage, Mn:0.5%, Ti:0.07%, Cu:0.3%, Mg:0.8%, Cr:0.13%, Zr:0.1%, Zn:0.15%, Sc:0.04%, As:0.0085%, S:0.0001%, surplus is aluminium and inevitable impurity.
The described heat treating method with the aluminium alloy of anti-fatigue performance, comprises the following steps:
(1) aluminium alloy being placed in vacuum tightness is under 0.02-0.08MPa, and to adjust temperature be subzero 20 DEG C to subzero 30 DEG C, then it to be proceeded in 10s temperature be isothermal holding 4-7h at 400-500 DEG C;
(2) aluminium alloy that step (1) has processed is placed in the environment that temperature is 600-800 DEG C, and to its surface sprinkling calcium hydroxide saturated solution, constant temperature process 30-60min;
(3) aluminium alloy that step (2) has processed is placed in the environment that temperature is subzero 5 DEG C to subzero 0.1 DEG C, adopts nitrogen protection process 10-30s;
(4) aluminium alloy that step (3) has processed being placed in temperature is 400-500 DEG C of process 20-40s, subsequently it is dipped in liquid nitrogen completely and processes 20-30s, after being taken out again, be placed in the environment isothermal holding 2-5min that temperature is 100-150 DEG C;
(5) aluminium alloy that step (4) has processed is processed 4-12h under temperature is 200-210 DEG C of environment.
Described calcium hydroxide saturated solution, its fountain height is that every square metre of aluminium alloy sprays 5-10kg.
Described calcium hydroxide saturated solution, its fountain height is that every square metre of aluminium alloy sprays 8kg.
Described sprinkling, it is distance between shower nozzle and aluminium alloy for after making saturated aqua calcis be sprayed onto aluminum alloy surface, and it has moisture to contact with aluminum alloy surface.
Compared with prior art, technique effect of the present invention is embodied in:
The present invention is by designing the percent mass proportioning of aluminium alloy component raw material, make can interact between wherein each component, reduce the content of impurity element, and the thermal treatment process combined aluminium alloy, make the intensity of the aluminium alloy obtained, toughness and corrosion resistance nature all more excellent, improve the anti-fatigue performance of aluminium alloy, improve the quality of aluminium alloy.
The present invention limits especially by by the silicon component content in component, again in conjunction with the restriction of Mn, Cu, Cr, Ti, Mg component content, while the hardness of the aluminum alloy materials obtained and intensity are improved, also the snappiness of aluminum alloy materials is made to be improved, and then avoid the higher phenomenon causing easily rupturing or tear of aluminum alloy hardness, improve the quality of aluminium alloy; And in conjunction with the restriction process of Sc, As, S composition, again in conjunction with the restriction of Fe component content, make the corrosion resistance nature of the aluminum alloy materials obtained more excellent, make the intensity of aluminum alloy materials, toughness and erosion resistance all more excellent, improve aluminium alloy anti-fatigue performance.
By in heat treatment process, first by aluminium alloy low temp vacuum-treat, aluminum alloy surface is made to form layer protecting film at low ambient temperatures, hot environment is entered from low temperature environment again in 10s, protective film recurring structure is changed, improve aluminum alloy surface structure, saturated aqua calcis is sprayed again in conjunction with high temperature, and low temperature nitrogen conservation treatment, make aluminium alloy internal structure and aluminum alloy surface structure occur to transform and combine, improve the folding strength of aluminium alloy, strengthen the tensile property of aluminium alloy, improve the toughness of aluminium alloy; Again in conjunction with high temperature liquid nitrogen immersion treatment and isothermal holding, make aluminum alloy surface again form protective membrane, improve aluminum alloy corrosion resistant ability, improve aluminium alloy anti-fatigue performance.
Embodiment
Below in conjunction with concrete embodiment, further restriction is done to technical scheme of the present invention, but claimed scope is not only confined to done description.
Embodiment 1
There is an aluminium alloy for anti-fatigue performance, comprise following component by mass percentage: Si:0.98%, Fe:0.41%, Mn:0.63%, Ti:0.08%, Cu:0.4%, Mg:1%, Cr:0.14%, Zr:0.2%, Zn:0.2%, Sc:0.06%, As:0.009%, S:0.0001%, surplus is aluminium and inevitable impurity.
Its heat treating method, comprises the following steps:
(1) aluminium alloy being placed in vacuum tightness is under 0.08MPa, and to adjust temperature be subzero 20 DEG C to subzero 30 DEG C, then it to be proceeded in 10s temperature be isothermal holding 7h at 500 DEG C;
(2) aluminium alloy that step (1) has processed is placed in the environment that temperature is 800 DEG C, and to its surface sprinkling calcium hydroxide saturated solution, constant temperature process 60min;
(3) aluminium alloy that step (2) has processed is placed in the environment that temperature is subzero 5 DEG C to subzero 0.1 DEG C, adopts nitrogen protection process 30s;
(4) aluminium alloy that step (3) has processed being placed in temperature is 500 DEG C of process 40s, it is dipped in liquid nitrogen completely subsequently and processes 30s, then after being taken out, be placed in the environment isothermal holding 5min that temperature is 150 DEG C;
(5) aluminium alloy that step (4) has processed is processed 12h under temperature is 210 DEG C of environment.
Described calcium hydroxide saturated solution, its fountain height is that every square metre of aluminium alloy sprays 10kg.
Described sprinkling, it is distance between shower nozzle and aluminium alloy for after making saturated aqua calcis be sprayed onto aluminum alloy surface, and it has moisture to contact with aluminum alloy surface.
Embodiment 2
There is an aluminium alloy for anti-fatigue performance, comprise following component by mass percentage: Si:0.57%, Fe:0.35%, Mn:0.45%, Ti:0.06%, Cu:0.1%, Mg:0.7%, Cr:0.1%, Zr:0.01%, Zn:0.1%, Sc:0.03%, As:0.008%, S:0.0001%, surplus is aluminium and inevitable impurity.
Its heat treating method, comprises the following steps:
(1) aluminium alloy being placed in vacuum tightness is under 0.02MPa, and to adjust temperature be subzero 20 DEG C to subzero 30 DEG C, then it to be proceeded in 10s temperature be isothermal holding 4-7h at 400 DEG C;
(2) aluminium alloy that step (1) has processed is placed in the environment that temperature is 600 DEG C, and to its surface sprinkling calcium hydroxide saturated solution, constant temperature process 30min;
(3) aluminium alloy that step (2) has processed is placed in the environment that temperature is subzero 5 DEG C to subzero 0.1 DEG C, adopts nitrogen protection process 10s;
(4) aluminium alloy that step (3) has processed being placed in temperature is 400 DEG C of process 20s, it is dipped in liquid nitrogen completely subsequently and processes 20s, then after being taken out, be placed in the environment isothermal holding 2min that temperature is 100 DEG C;
(5) aluminium alloy that step (4) has processed is processed 4h under temperature is 200 DEG C of environment.
Described calcium hydroxide saturated solution, its fountain height is that every square metre of aluminium alloy sprays 5kg.
Described sprinkling, it is distance between shower nozzle and aluminium alloy for after making saturated aqua calcis be sprayed onto aluminum alloy surface, and it has moisture to contact with aluminum alloy surface.
Embodiment 3
Have an aluminium alloy for anti-fatigue performance, its component is Si:0.7%, Fe:0.4% by mass percentage, Mn:0.5%, Ti:0.07%, Cu:0.3%, Mg:0.8%, Cr:0.13%, Zr:0.1%, Zn:0.15%, Sc:0.04%, As:0.0085%, S:0.0001%, surplus is aluminium and inevitable impurity.
Its heat treating method, comprises the following steps:
(1) aluminium alloy being placed in vacuum tightness is under 0.06MPa, and to adjust temperature be subzero 20 DEG C to subzero 30 DEG C, then it to be proceeded in 10s temperature be isothermal holding 5h at 450 DEG C;
(2) aluminium alloy that step (1) has processed is placed in the environment that temperature is 700 DEG C, and to its surface sprinkling calcium hydroxide saturated solution, constant temperature process 50min;
(3) aluminium alloy that step (2) has processed is placed in the environment that temperature is subzero 5 DEG C to subzero 0.1 DEG C, adopts nitrogen protection process 20s;
(4) aluminium alloy that step (3) has processed being placed in temperature is 450 DEG C of process 30s, it is dipped in liquid nitrogen completely subsequently and processes 25s, then after being taken out, be placed in the environment isothermal holding 3min that temperature is 130 DEG C;
(5) aluminium alloy that step (4) has processed is processed 8h under temperature is 205 DEG C of environment.
Described calcium hydroxide saturated solution, its fountain height is that every square metre of aluminium alloy sprays 8kg.
Described sprinkling, it is distance between shower nozzle and aluminium alloy for after making saturated aqua calcis be sprayed onto aluminum alloy surface, and it has moisture to contact with aluminum alloy surface.
Aluminium alloy component by embodiment 1-3 is filled a prescription after obtaining aluminum alloy materials according to semicontinuous casting, again the heat treating method of the aluminum alloy materials of acquisition according to embodiment 1-3 is heat-treated, and performance test is carried out to the aluminum alloy materials after thermal treatment, it the results are shown in Table shown in 1:
Table 1
| Tensile strength (MPa) | Yield strength (MPa) | Unit elongation (%) | |
| Embodiment 1 | 450 | 412 | 13 |
| Embodiment 2 | 445 | 418 | 12.5 |
| Embodiment 3 | 439 | 415 | 13 |
Can draw from the test result of table 1, its tensile strength is greater than 430MPa, and yield strength is at more than 410MPa, and unit elongation is more than 12%.It has higher intensity and plasticity, all higher than the index request of GB 2025-T3, has preferably anti-fatigue performance.
Claims (6)
1. there is an aluminium alloy for anti-fatigue performance, it is characterized in that, comprise following component by mass percentage: Si:0.57 ~ 0.98%, Fe:0.35 ~ 0.41%, Mn:0.45 ~ 0.63%, Ti:0.06-0.08%, Cu:0.1-0.4%, Mg:0.7-1%, Cr:0.1-0.14%, Zr:0.01-0.2%, Zn:0.1-0.2%, Sc:0.03-0.06%, As:0.008-0.009%, S:0.0001%, surplus is aluminium and inevitable impurity.
2. there is the aluminium alloy of anti-fatigue performance as claimed in claim 1, it is characterized in that, described component, it is Si:0.7%, Fe:0.4%, Mn:0.5% by mass percentage, Ti:0.07%, Cu:0.3%, Mg:0.8%, Cr:0.13%, Zr:0.1%, Zn:0.15%, Sc:0.04%, As:0.0085%, S:0.0001%, surplus is aluminium and inevitable impurity.
3. the heat treating method with the aluminium alloy of anti-fatigue performance as described in any one of claim 1-2, is characterized in that, comprise the following steps:
(1) aluminium alloy being placed in vacuum tightness is under 0.02-0.08MPa, and to adjust temperature be subzero 20 DEG C to subzero 30 DEG C, then it to be proceeded in 10s temperature be isothermal holding 4-7h at 400-500 DEG C;
(2) aluminium alloy that step (1) has processed is placed in the environment that temperature is 600-800 DEG C, and to its surface sprinkling calcium hydroxide saturated solution, constant temperature process 30-60min;
(3) aluminium alloy that step (2) has processed is placed in the environment that temperature is subzero 5 DEG C to subzero 0.1 DEG C, adopts nitrogen protection process 10-30s;
(4) aluminium alloy that step (3) has processed being placed in temperature is 400-500 DEG C of process 20-40s, subsequently it is dipped in liquid nitrogen completely and processes 20-30s, after being taken out again, be placed in the environment isothermal holding 2-5min that temperature is 100-150 DEG C;
(5) aluminium alloy that step (4) has processed is processed 4-12h under temperature is 200-210 DEG C of environment.
4. have the heat treating method of the aluminium alloy of anti-fatigue performance as claimed in claim 3, it is characterized in that, described calcium hydroxide saturated solution, its fountain height is that every square metre of aluminium alloy sprays 5-10kg.
5. the heat treating method with the aluminium alloy of anti-fatigue performance as described in claim 3 or 4, is characterized in that, described calcium hydroxide saturated solution, and its fountain height is that every square metre of aluminium alloy sprays 8kg.
6. there is the heat treating method of the aluminium alloy of anti-fatigue performance as claimed in claim 3, it is characterized in that, described sprinkling, it is distance between shower nozzle and aluminium alloy for after making saturated aqua calcis be sprayed onto aluminum alloy surface, and it has moisture to contact with aluminum alloy surface.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251707A (en) * | 2018-02-27 | 2018-07-06 | 威海南海碳材料科技研究院有限公司 | A kind of graphene aluminium alloy and preparation method thereof |
| CN112981285A (en) * | 2021-02-09 | 2021-06-18 | 华东理工大学 | Non-submerged jet material surface strengthening method |
| CN114043317A (en) * | 2021-10-21 | 2022-02-15 | 常州市丰润特种纤维有限公司 | Surface treatment method for enhancing fatigue resistance of metal matrix composite |
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