CN107858567B - A kind of birmastic and preparation method thereof for exempting from heat treatment - Google Patents
A kind of birmastic and preparation method thereof for exempting from heat treatment Download PDFInfo
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- CN107858567B CN107858567B CN201711135031.8A CN201711135031A CN107858567B CN 107858567 B CN107858567 B CN 107858567B CN 201711135031 A CN201711135031 A CN 201711135031A CN 107858567 B CN107858567 B CN 107858567B
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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
- C22C21/12—Alloys based on aluminium with copper 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
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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Abstract
A kind of birmastic for exempting from heat treatment, it is characterized by: described exempt to be heat-treated High Strength Cast Aluminum Alloy, its component is respectively as follows: Cu:7.5~10.5% by weight percentage, Mn:0.5~0.8%, Ti:0.25~0.45%, Ca:1.5~3.0%, impurity are less than or equal to 0.1%, and surplus is aluminium.Cast aluminium alloy gold is not thermally treated can reach higher tensile strength for the heat treatment of exempting from of the application, and has certain elongation percentage, can use for a long time under 250 DEG C of high temperature, save production stage, improves production efficiency.
Description
Technical field
The invention belongs to metal material field, it is related to the birmastic and preparation method that one kind can not be heat-treated.
Background technique
Aluminium alloy is a kind of lightweight, high-performance metal materials, be widely used to Aeronautics and Astronautics, weapons, electronics, ship,
The fields such as high-speed rail, civilian.Currently, automobile engine, aero-engine cold end with etc. the usual service temperature of components be above 200
DEG C, pack alloy is mostly used at present, and diecasting alloys interior tissue is not fine and close, and there are more pin holes, influences casting and uses the longevity
Life.Since components lightweight demand is more and more obvious, conventional pack alloy intensity, elongation percentage and service life have started
Can not meet components demand, develop a kind of low cost, high-strength, the heat resistant type cast aluminium alloy gold of exempting from heat treatment it is very necessary.
Summary of the invention
To solve the above problems, the present invention provides a kind of heat resistant type cast aluminium alloy gold for exempting from heat treatment and its preparation sides
Method, specific technical solution are as follows:
It is a kind of exempt from heat treatment birmastic, which is characterized in that it is described exempt from heat treatment cast aluminium alloy gold include
The alloying component of following mass percent: Cu:7.5~10.5%, Mn:0.5~0.8%, Ti:0.25~0.45%, Ca:1.5
~3.0%, impurity is less than or equal to 0.1%, and surplus is aluminium.
Further,
The mass percent of the Cu are as follows: 8.0~9.5%.
The mass percent of the Mn are as follows: 0.6~0.7%.
The mass percent of the Ti are as follows: 0.3~0.4%.
The mass percent of the Ca are as follows: 1.7~2.8%.
Described Cu: Ca mass percent ratio is not less than 3.85.
A kind of preparation method of the aforementioned birmastic for exempting from heat treatment, which is characterized in that the preparation method packet
Include following steps:
Aluminium, Cu, Ti, Mn component are added in smelting furnace by the first step by mass percentage, are heated to 750~780 DEG C, protect
4~5h of temperature stirs 10-15min after alloy compositions are all fused into molten aluminium alloy；
Second step, by the control of molten aluminium alloy temperature at 680 DEG C~700 DEG C, the metal Ca that will be prepared by mass percentage
It is added, stirs 3~5min；
The refining agent of alloy melt gross mass 0.5~0.7% is added in third step, stirs 10~15min, is then allowed to stand 20
~30min, is poured.
Further,
In the first step, the aluminium uses the form of fine aluminium, and described Cu, Ti, Mn are added in the form of intermediate alloy, described
Intermediate alloy is respectively AlCu50, AlTi4, AlMn10 intermediate alloy, wherein the constituent content in the intermediate alloy requires full
Sufficient GB/T 27677-2011 requirement.
The application has technical effect beneficial below:
1. the application on the basis of aluminium copper, introduces a certain amount of Ca element, high temperature, stable netted analysis are produced
Hardening constituent Al-Cu-Ca phase out；
2. the application can reach following technical indicator: as cast condition tensile strength is 320MPa~340MPa, elongation percentage is 3~
5%, it does not fail in 250 DEG C of heat preservation 500h intensity.
Detailed description of the invention
Fig. 1 is equally distributed eutectic, netted Al-Cu-Ca phase in alloy of the present invention；
Fig. 2 is the tensile strength situation of change that alloy of the present invention is kept the temperature at 250 DEG C；
Fig. 3 is the Al-Cu-Ca alloy microstructure that Cu/Ca ratio is 3.6.
Specific embodiment
With reference to the accompanying drawings of the specification and the technical solution of the application is described in further detail in specific embodiment.
The invention discloses a kind of birmastic for exempting from heat treatment, the birmastic for exempting from heat treatment
Alloying component including following mass percent: Cu:7.5~10.5%, Mn:0.5~0.8%, Ti:0.25~0.45%, Ca:
1.5~3.0%, impurity is less than or equal to 0.1%, and surplus is aluminium.
For fine aluminium, the addition of a small amount of Ca element can generate corynebacterium or block-like Al in conjunction with Al4Ca phase, has
Conducive to its machinability of raising.For made of Al-Cu alloy, the introducing of a large amount of Ca elements can thoroughly change traditional made of Al-Cu alloy
Microstructure.There are a certain amount of nascent Al for traditional as cast condition made of Al-Cu alloy2Cu phase, and the as cast condition of aluminium alloy is micro- in the present invention
Sight tissue is eutectic, netted Al-Cu-Ca phase, as shown in Figure 1, these precipitated phases are uniformly distributed in crystal boundary, and itself is hard
Precipitated phase can effectively hinder crystal boundary mobile, improve alloy strength；Meanwhile these eutectics Al-Cu-Ca precipitated phase is solid through high temperature
Do not change after molten (538 DEG C), not back dissolving, there is good thermal stability.
In the examples below that, al alloy component is measured according to national standard GB/T 6987-2001, according to GB/T
228-2010 is measured the tensile strength and elongation percentage of alloy.
Embodiment 1
One kind disclosed in the present embodiment is exempted to be heat-treated birmastic, and each component mass percent is as follows: Cu:
8.1%, Mn:0.62%, Ti:0.32%, Ca:2.3%, impurity are equal to 0.06%, and surplus is aluminium.
Described in embodiment 1 to exempt to be heat-treated heat resistant type cast aluminium alloy gold, preparation method is as follows:
Step 1: according to quality proportioning, aluminium, Cu, Ti, Mn progress melting being added in a furnace, wherein aluminium uses the shape of fine aluminium
Formula, described Cu, Ti, Mn are added in the form of intermediate alloy, and the intermediate alloy is respectively in AlCu50, AlTi50, AlMn10
Between alloy, furnace temperature is risen to 780 DEG C, keeps the temperature 4h, after component alloy is completely melt molten aluminium alloy, stirs 12min.
Step 2: furnace temperature being down to 680 DEG C, the metal Ca for pressing quality proportioning is added, stirs 3min；
Step 3: the refining agent for accounting for aluminum melt gross mass 0.6% is added, stirs 10~15min, stands 20~30min, into
Row casting.
As-cast aluminum alloy tensile strength be 320MPa, elongation percentage 4.1%, 250 DEG C respectively keep the temperature 100h and 500h after resist
Tensile strength is 330MPa and 328MPa, and intensity is held essentially constant in insulating process.
As shown in Fig. 2 for it is disclosed in the present application exempt to be heat-treated the tension that keeps the temperature at 250 DEG C of birmastic it is strong
Spend situation of change, it can be seen that as-cast aluminum alloy in the application as cast condition and heat treatment state being basically unchanged of tensile strength,
It is (such as microcosmic up and down the reason of fluctuation and Fine Texture of Material unevenly has certain relationship only to maintain 325MPa or more fluctuation
Organize precipitate volume fraction or grain size everywhere that can have a certain difference, belong to normal phenomenon), this says
Bright, alloy in the application intensity in 250 DEG C of insulating processes is unattenuated, has preferable heat resistance.
Embodiment 2
One kind disclosed in the present embodiment is exempted to be heat-treated birmastic, and each component mass percent is as follows: Cu:
9.2%, Mn:0.63%, Ti:0.31%, Ca:2.8%, impurity are equal to 0.05%, and surplus is aluminium.
Exempt to be heat-treated heat resistant type cast aluminium alloy gold disclosed in embodiment 2, preparation method is as follows:
Step 1: according to quality proportioning, aluminium, Cu, Ti, Mn progress melting being added in a furnace, wherein aluminium uses the shape of fine aluminium
Formula, described Cu, Ti, Mn are added in the form of intermediate alloy, and the intermediate alloy is respectively Al-50Cu, Al-4Ti, Al-10Mn
Furnace temperature is risen to 760 DEG C, keeps the temperature 4.5h by intermediate alloy, after alloy compositions are completely melt into molten aluminium alloy, stirs 15min.
Step 2: furnace temperature being down to 700 DEG C, the metal Ca for pressing quality proportioning is added, stirs 4min；
Step 3: the refining agent of melt quality 0.6% is added, stirs 10~15min: 20~30min is stood, is poured
Note.
As-cast aluminum alloy tensile strength be 339MPa, elongation percentage 3.9%, 250 DEG C respectively keep the temperature 100h and 500h after resist
Tensile strength is 338MPa and 331MPa, and intensity is held essentially constant in insulating process.
It should be noted that when Cu/Ca mass percent ratio is less than 3.85, the basic middle eutectic Al-Cu-Ca generated
Mutually start roughening, cracking, this has adverse effect to the comprehensive mechanical property of alloy.The experimental results showed that when Cu is that 9%, Ca is
When 2.5%, basic middle eutectic Al-Cu-Ca phase starts obviously to be roughened, and cracked in eutectic phase (eutectic Al-Cu-Ca is brittleness
Phase), as shown in Fig. 3.At this point, cast alloy tensile strength is 296MPa, elongation percentage is down to 1.8%.
The embodiment of the invention is described in detail above, but the content is only the preferable of the invention
Embodiment should not be considered as limiting the scope of the invention.It is all according to equivalent change made by the invention range with
Improve etc., it shall still fall within the scope of this patent.
Claims (7)
1. a kind of birmastic for exempting from heat treatment, which is characterized in that the birmastic packet for exempting from heat treatment
The alloying component of following mass percent: Cu:7.5~10.5% is included, Mn:0.62~0.8%, Ti:0.25~0.45%, Ca:
1.5~2.8%, impurity is less than or equal to 0.1%, and surplus is aluminium, and wherein the mass percent ratio of Cu:Ca is not less than 3.85；
Eutectic, netted Al-Cu-Ca phase is precipitated in the birmastic, is uniformly distributed in crystal boundary.
2. the birmastic according to claim 1 for exempting from heat treatment, it is characterised in that:
The mass percent of the Cu are as follows: 8.0~9.5%.
3. the birmastic according to claim 1 or 2 for exempting from heat treatment, it is characterised in that:
The mass percent of the Mn are as follows: 0.62~0.7%.
4. the birmastic according to claim 3 for exempting from heat treatment, it is characterised in that:
The mass percent of the Ti are as follows: 0.3~0.4%.
5. the birmastic according to claim 4 for exempting from heat treatment, it is characterised in that:
The mass percent of the Ca are as follows: 1.7~2.8%.
6. a kind of preparation of the heat-resistant cast aluminium copper for exempting from heat treatment as described in any one of claim 1-5 claim
Method, which is characterized in that the preparation method comprises the following steps:
Aluminium, Cu, Ti, Mn component are added in smelting furnace by the first step by mass percentage, are heated to 750~780 DEG C, and heat preservation 4~
5h stirs 10-15min after alloy compositions are all fused into molten aluminium alloy；
Molten aluminium alloy temperature is controlled at 680 DEG C~700 DEG C, the metal Ca prepared by mass percentage is added by second step,
Stir 3~5min；
Third step is added and accounts for the refining agent of alloy melt gross mass 0.5~0.7%, stirs 10~15min, it is then allowed to stand 20~
30min is poured.
7. the preparation method of the birmastic according to claim 6 for exempting from heat treatment, it is characterised in that:
In the first step, the aluminium uses the form of fine aluminium, and described Cu, Ti, Mn are added in the form of intermediate alloy, the centre
Alloy is respectively AlCu50, AlTi4, AlMn10 intermediate alloy.
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| CN112626362B (en) * | 2020-12-15 | 2022-02-11 | 南京航空航天大学 | Preparation method of Al-Mg series cast heat-resistant aluminum alloy |
| CN113802024A (en) * | 2021-08-17 | 2021-12-17 | 济南大学 | Modification method of aluminum-copper alloy and aluminum-copper-calcium alloy |
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| RU2163940C1 (en) * | 1999-08-09 | 2001-03-10 | Государственное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" | Aluminum-base alloy and article made of it |
| CN101956109A (en) * | 2010-10-15 | 2011-01-26 | 镇江忆诺唯记忆合金有限公司 | Method for improving thermal fatigue property of aluminum-copper-manganese alloy by adding titanium |
| RU2447173C1 (en) * | 2011-04-05 | 2012-04-10 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Aluminium-based alloy |
| CN102433470A (en) * | 2011-12-15 | 2012-05-02 | 贵州华科铝材料工程技术研究有限公司 | Aluminium alloy co-dissolved with TiAlN and CaH3 powder and smelting method |
| CN102610829A (en) * | 2012-03-23 | 2012-07-25 | 江苏华富储能新技术发展有限公司 | Cadmium-free copper, aluminum and rare earth alloy grid of power type lead-acid battery and preparation method of cadmium-free copper, aluminum and rare earth alloy grid |
| CN106854721A (en) * | 2015-12-09 | 2017-06-16 | 余姚市朗霞街道飞达冲件厂 | Aluminium alloy |
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- 2017-11-16 CN CN201711135031.8A patent/CN107858567B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2163940C1 (en) * | 1999-08-09 | 2001-03-10 | Государственное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" | Aluminum-base alloy and article made of it |
| CN101956109A (en) * | 2010-10-15 | 2011-01-26 | 镇江忆诺唯记忆合金有限公司 | Method for improving thermal fatigue property of aluminum-copper-manganese alloy by adding titanium |
| RU2447173C1 (en) * | 2011-04-05 | 2012-04-10 | Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) | Aluminium-based alloy |
| CN102433470A (en) * | 2011-12-15 | 2012-05-02 | 贵州华科铝材料工程技术研究有限公司 | Aluminium alloy co-dissolved with TiAlN and CaH3 powder and smelting method |
| CN102610829A (en) * | 2012-03-23 | 2012-07-25 | 江苏华富储能新技术发展有限公司 | Cadmium-free copper, aluminum and rare earth alloy grid of power type lead-acid battery and preparation method of cadmium-free copper, aluminum and rare earth alloy grid |
| CN106854721A (en) * | 2015-12-09 | 2017-06-16 | 余姚市朗霞街道飞达冲件厂 | Aluminium alloy |
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