CN102418011A - High-strength aluminum alloy added with AlCrN and RbH and preparation method of aluminum alloy - Google Patents
High-strength aluminum alloy added with AlCrN and RbH and preparation method of aluminum alloy Download PDFInfo
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- CN102418011A CN102418011A CN201110421185XA CN201110421185A CN102418011A CN 102418011 A CN102418011 A CN 102418011A CN 201110421185X A CN201110421185X A CN 201110421185XA CN 201110421185 A CN201110421185 A CN 201110421185A CN 102418011 A CN102418011 A CN 102418011A
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Abstract
The invention discloses a high-strength aluminum alloy added with AlCrN and RbH and a preparation method of the aluminum alloy. The method comprises the following steps of: heating aluminum ingots or molten aluminum till complete melting; adding Si, Fe, Cu, Mn, Mg, Zn and Ti, and completely dissolving and melting the elements; preserving the heat at the temperature of between 700 and 1,000 DEG C after refining, and obtaining an alloy melt; performing degassing purification operation on the alloy melt by using nitrogen or inert gas or mixed gas of the nitrogen and the inert gas in a random ratio, and continuously introducing the gas till the reaction is finished; adding AlCrN and RbH powder into the alloy melt in a fluidized form together with the gas; stirring to make the AlCrN and the RbH distributed uniformly in the alloy melt and fully reacted with the alloy melt; and standing, regulating the temperature to 680-730 DEG C, and discharging the molten alloy for casting. By the method, the defects of the properties of the conventional aluminum alloy can be overcome, the toughness, the forming property and the hardening capacity of the aluminum alloy are improved, and a high-end base material is provided for efficient deep processing.
Description
Technical field
The present invention relates to a kind of aldural, also relate to its preparation method.
Background technology
According to statistics, in the 500 various deformation aluminum alloy materials, the duraluminum that is usually used in the large-scale ingot blank of founding is less than 20 in the world; Wherein be most commonly used to the large-scale ingot blank of founding and the duraluminum of producing slab and have 5083,5026,6082,2017,2024,2219,7075,7050 etc.; In these materials, what belong to duralumin and ultralumin category is 2XXX system and 7XXX system, and its slab is used for aerospace industry more; But the poor performance of the large-scale ingot blank of its founding, slab ingot and pole shaping rate are very low; 5XXX system, 6XXX are the alloy casting better performances, but intensity is low; Other then belongs to soft aluminium category like 1XXX system, 3XXX line aluminium alloy.
The forming property of present aluminum alloy materials during except the large-scale ingot blank of founding is relatively poor; Large-scale ingot blank is not high in the hardening capacity of heat treatment process, tempering resistance is relatively poor and can not satisfy higher mechanical property requirements or some property (as heat-resisting, anti-corrosion) etc., is significant deficiency yet.These defectives make it in the process of strong materials of weight such as field of engineering technology instead of steel goods and structure, form the technological breakpoint that is difficult to cross over.
Summary of the invention
In order to overcome the deficiency of prior art, the present invention provides a kind of aldural, can overcome the deficiency of existing aluminium alloy capability, improves its obdurability, plasticity and hardening capacity, for efficient deep processing provides high-end base material.
The technical solution adopted for the present invention to solve the technical problems is: a kind of aldural by percentage to the quality, comprises 1.0～1.7% Si; Fe smaller or equal to 0.5%, 0.15～0.4% Cu, 0.4～1.0% Mn; Cr smaller or equal to 0.1%, 0.5～1.2% Mg, Zn smaller or equal to 0.25%; 0.6～1.5% Cr, 0.16～0.40% N, 0.98～2.45% Rb, surplus is Al and unavoidable impurities; The content of every kind of impurity is no more than 0.05% of total mass per-cent, and the content of all impurity is no more than 0.15% of total mass per-cent.
The present invention also provides the preparation method of said aldural, adds AlCrN and RbH with the Combined Processing mode, may further comprise the steps:
Step 1: the component according to said aldural is got the raw materials ready, and comprises the Si that accounts for total product mass percent 1.0～1.7%, the Fe smaller or equal to 0.5%; 0.15～0.4% Cu, 0.4～1.0% Mn, Cr smaller or equal to 0.1%; 0.5～1.2% Mg, the Zn smaller or equal to 0.25%;
Step 2: in smelting furnace, add aluminium ingot or molten aluminum liquid earlier, heating makes it to melt fully, adds getting the raw materials ready of step 1 earlier by formula rate, makes it to dissolve fully and melt, and 700～1000 ℃ of insulations down, obtains alloy melt after the refining; Melting process is accomplished in enclosed environment;
Step 3: use the mixed gas of nitrogen or rare gas element or nitrogen and rare gas element arbitrary proportion that alloy melt is carried out the degassing and purifying operation, and lasting ventilation finishes until reaction; To account for the AlCrN of total product mass percent 1.07～2.68% simultaneously, 0.99～2.45% RbH powder joins in the alloy melt with above-mentioned gas with the fluidization mode; Stir, AlCrN and RbH are evenly distributed in alloy melt, and fully react with alloy melt; Leave standstill, temperature adjustment to 680～730 ℃, alloy liquid is come out of the stove, and obtains said aldural.Carry out the Foundry Production of different goods respectively along following two kinds of flow processs.
Flow process one: the longshore current groove is toppled over and is come out of the stove, and to vertical water cooling casting machine system, casting processing use ingot blank, particularly above large-scale slab ingot of cast thickness 500mm and the pole more than the diameter 500mm.
Flow process two: metaideophone is gone in the mold of foundry goods, uses metal mold, sand mold or mixed type casting mode, adopts gravitational casting, pressure die casting or counter-pressure casting technology, the aluminum alloy casting of y alloy y foundry goods, particularly casting large-scale, thin-walled or complex construction.
The invention has the beneficial effects as follows:
1, solved high temperature insoluble metal element dissolving and the phase balance problem in aluminium alloy melt.
2, in molten aluminium, caused multiple grain refining element, particle, thickization that prevents matrix and strengthening phase had good result.
3, in cooled aluminum substrate, caused stable high interstitial atom and gap mutually, become new efficient strengthening phase, the intensity of material and hardness are improved.
Specifically; AlCrN and RbH powder are adding in the aluminium alloy melt process with protective gas with the fluidization form; Have the specific surface area more much bigger, can realize disperseing fast and fully contacting, significantly shortened and disperseed and the uniform time with melt than general cake mass.
AlCrN is in the high temperature aluminum melt, because aluminium itself is exactly the fabulous metal of electroconductibility at normal temperatures, in the hot environment more than 700 ℃; Its molten state is a kind of high-density unbound electron and aluminum ions mixtinite; Have high activity, a part of electronegativity of can reducing is higher than its carbide and nitride, even dissolving and dissociation reaction take place nitride; Decomposite atomic state N element, also discharge dispersive atomic state refractory metal element own simultaneously; These elements that decompose out further with reactive aluminum, generate various reinforcement facies pattern materials and rotten formulation material; These atomic state materials react with aluminum substrate at once, at first dissolve in matrix and form common solution, after reaching capacity, further generate multiple intermetallic compound with aluminium again.These metallic compounds when melt cools off because the minimum free energy principle of system, can not stable existence in the crystal grain that forms; Will be under the driving that lattice distortion can differ from move and concentrate to crystal boundary, simultaneously, because the saturation solubility of alloying element in aluminum substrate descends along with temperature and significantly reduces; So along with the cooling of melt, oversaturated melt is constantly separated out the intermetallic compound that is rich in alloying element, these compounds are in the intergranular enrichment; Be difficult for to each other merging, in microtexture, become thick intergranular compound group, alloy is produced crisp sclerosis influence; Worsen the alloy casting forming property, reduce its homogeneity, toughness, solidity to corrosion and through hardening performance.So; When alloy graining becomes the substruction of supersaturated solid solution matrix+intergranular metallic compound; Be commonly referred to pure as-cast structure, the alloy with this tissue just can have the mechanical property and other technical indicator of satisfying the demand after must passing through the thermal treatment of " solid solution+timeliness ".Simultaneously, Cr atoms of elements radius is different with aluminium, and difference surpasses 5%; Can cause the distortion of lattice intensive like this; Form bigger distortional strain energy, when the saturation solubility of element in molten aluminium big, and the solid solubility under the room temperature hour; System is solidified the lattice distortion of generation can be also big, be equivalent to the part heat content of system under the condition of high temperature with lattice distortion can form be stored in the structure; Can be in microtexture during uniform distribution when lattice distortion, the macro property of whole material is improved: like intensity, ductility, stress corrosion resistant ability etc.Otherwise, when lattice distortion ability skewness, when particularly concentrating on crystal boundary; Produce powerful potential energy of stress between the strengthening phase, the crystal boundary characteristic has been represented the characteristic of whole material, and material just demonstrates hard fragility and susceptibility-to-corrosion; Big tearing tendency is arranged when casting; Crystal grain is thick, and both easy of crack when solution hardening reduces hardening capacity again.
The present invention adds 1.07～2.68% AlCrN, 0.99～2.45% RbH powder in wrought aluminium alloy, can in alloy graining process, effectively increase heterogeneous forming core core, thereby reaches the effect of grain refining, strengthens alloy strength; And the element that adds can promote to form interstitial atom and gap mutually; During high temperature in α (Al) sosoloid solubleness big, and very little when room temperature, thereby make alloy have higher heat-treatability matter; After the thermal treatment, its intensity and hardness all have significant improvement.
Below in conjunction with embodiment the present invention is further specified.
Embodiment
Embodiment 1:
A kind of aldural by percentage to the quality, comprises 1.0% Si, 0.5% Fe; 0.15% Cu, 0.4% Mn, 0.1% Cr, 0.5% Mg; 0.25% Zn, 0.6% Cr, 0.16% N, 0.98% Rb; Surplus is Al and unavoidable impurities, and the content of every kind of impurity is no more than 0.05% of total mass per-cent, and the content of all impurity is no more than 0.15% of total mass per-cent.
The present invention also provides the preparation method of said aldural, adds AlCrN and RbH with the Combined Processing mode, may further comprise the steps:
Step 1: the component according to said aldural is got the raw materials ready, and comprises the Si that accounts for total product mass percent 1.0%, 0.5% Fe, 0.15% Cu, 0.4% Mn, 0.1% Cr, 0.5% Mg, 0.25% Zn;
Step 2: in smelting furnace, add aluminium ingot or molten aluminum liquid earlier, heating makes it to melt fully, adds getting the raw materials ready of step 1 earlier by formula rate, makes it to dissolve fully and melt, and 700～1000 ℃ of insulations down, obtains alloy melt after the refining; Melting process is accomplished in enclosed environment;
Step 3: use the mixed gas of nitrogen or rare gas element or nitrogen and rare gas element arbitrary proportion that alloy melt is carried out the degassing and purifying operation, and lasting ventilation finishes until reaction; To account for the AlCrN of total product mass percent 1.07% simultaneously, 0.99% RbH powder joins in the alloy melt with above-mentioned gas with the fluidization mode; Stir, AlCrN and RbH are evenly distributed in alloy melt, and fully react with alloy melt; Leave standstill, temperature adjustment to 680～730 ℃, alloy liquid is come out of the stove, and carries out the Foundry Production of different goods respectively along following two kinds of flow processs.
Flow process one: the longshore current groove is toppled over and is come out of the stove, and to vertical water cooling casting machine system, casting processing use ingot blank, particularly above large-scale slab ingot of cast thickness 500mm and the pole more than the diameter 500mm.
Flow process two: metaideophone is gone in the mold of foundry goods, uses metal mold, sand mold or mixed type casting mode, adopts gravitational casting, pressure die casting or counter-pressure casting technology, the aluminum alloy casting of y alloy y foundry goods, particularly casting large-scale, thin-walled or complex construction.
Embodiment 2:
A kind of aldural by percentage to the quality, comprises 1.3% Si, 0.4% Fe; 0.28% Cu, 0.7% Mn, 0.08% Cr, 0.8% Mg; 0.2% Zn, 1.1% Cr, 0.3% N, 1.59% Rb; Surplus is Al and unavoidable impurities, and the content of every kind of impurity is no more than 0.05% of total mass per-cent, and the content of all impurity is no more than 0.15% of total mass per-cent.
The present invention also provides the preparation method of said aldural, adds AlCrN and RbH with the Combined Processing mode, may further comprise the steps:
Step 1: the component according to said aldural is got the raw materials ready, and comprises the Si that accounts for total product mass percent 1.3%, 0.4% Fe, 0.28% Cu, 0.7% Mn, 0.08% Cr, 0.8% Mg, 0.2% Zn;
Step 2: in smelting furnace, add aluminium ingot or molten aluminum liquid earlier, heating makes it to melt fully, adds getting the raw materials ready of step 1 earlier by formula rate, makes it to dissolve fully and melt, and 700～1000 ℃ of insulations down, obtains alloy melt after the refining; Melting process is accomplished in enclosed environment;
Step 3: use the mixed gas of nitrogen or rare gas element or nitrogen and rare gas element arbitrary proportion that alloy melt is carried out the degassing and purifying operation, and lasting ventilation finishes until reaction; To account for the AlCrN of total product mass percent 1.72% simultaneously, 1.60% RbH powder joins in the alloy melt with above-mentioned gas with the fluidization mode; Stir, AlCrN and RbH are evenly distributed in alloy melt, and fully react with alloy melt; Leave standstill, temperature adjustment to 680～730 ℃, alloy liquid is come out of the stove, and carries out the Foundry Production of different goods respectively along following two kinds of flow processs.
Flow process one: the longshore current groove is toppled over and is come out of the stove, and to vertical water cooling casting machine system, casting processing use ingot blank, particularly above large-scale slab ingot of cast thickness 500mm and the pole more than the diameter 500mm.
Flow process two: metaideophone is gone in the mold of foundry goods, uses metal mold, sand mold or mixed type casting mode, adopts gravitational casting, pressure die casting or counter-pressure casting technology, the aluminum alloy casting of y alloy y foundry goods, particularly casting large-scale, thin-walled or complex construction.
Embodiment 3:
A kind of aldural by percentage to the quality, comprises 1.7% Si, 0.3% Fe; 0.4% Cu, 1.0% Mn, 0.06% Cr, 1.2% Mg; 0.18% Zn, 1.5% Cr, 0.40% N, 2.45% Rb; Surplus is Al and unavoidable impurities, and the content of every kind of impurity is no more than 0.05% of total mass per-cent, and the content of all impurity is no more than 0.15% of total mass per-cent.
The present invention also provides the preparation method of said aldural, adds AlCrN and RbH with the Combined Processing mode, may further comprise the steps:
Step 1: the component according to said aldural is got the raw materials ready, and comprises the Si that accounts for total product mass percent 1.0～1.7%, the Fe smaller or equal to 0.5%; 0.15～0.4% Cu, 0.4～1.0% Mn, Cr smaller or equal to 0.1%; 0.5～1.2% Mg, the Zn smaller or equal to 0.25%;
Step 2: in smelting furnace, add aluminium ingot or molten aluminum liquid earlier, heating makes it to melt fully, adds getting the raw materials ready of step 1 earlier by formula rate, makes it to dissolve fully and melt, and 700～1000 ℃ of insulations down, obtains alloy melt after the refining; Melting process is accomplished in enclosed environment;
Step 3: use the mixed gas of nitrogen or rare gas element or nitrogen and rare gas element arbitrary proportion that alloy melt is carried out the degassing and purifying operation, and lasting ventilation finishes until reaction; To account for the AlCrN of total product mass percent 2.68% simultaneously, 2.48% RbH powder joins in the alloy melt with above-mentioned gas with the fluidization mode; Stir, AlCrN and RbH are evenly distributed in alloy melt, and fully react with alloy melt; Leave standstill, temperature adjustment to 680～730 ℃, alloy liquid is come out of the stove, and carries out the Foundry Production of different goods respectively along following two kinds of flow processs.
Flow process one: the longshore current groove is toppled over and is come out of the stove, and to vertical water cooling casting machine system, casting processing use ingot blank, particularly above large-scale slab ingot of cast thickness 500mm and the pole more than the diameter 500mm.
Flow process two: metaideophone is gone in the mold of foundry goods, uses metal mold, sand mold or mixed type casting mode, adopts gravitational casting, pressure die casting or counter-pressure casting technology, the aluminum alloy casting of y alloy y foundry goods, particularly casting large-scale, thin-walled or complex construction.
Claims (2)
1. an aldural that adds AlCrN and RbH is characterized in that: by percentage to the quality, comprise 1.0～1.7% Si; Fe smaller or equal to 0.5%, 0.15～0.4% Cu, 0.4～1.0% Mn; Cr smaller or equal to 0.1%, 0.5～1.2% Mg, Zn smaller or equal to 0.25%; 0.6～1.5% Cr, 0.16～0.40% N, 0.98～2.45% Rb, surplus is Al and unavoidable impurities; The content of every kind of impurity is no more than 0.05% of total mass per-cent, and the content of all impurity is no more than 0.15% of total mass per-cent.
2. the said preparation method who adds the aldural of AlCrN and RbH of claim 1 is characterized in that comprising the steps:
Step 1: the component according to said aldural is got the raw materials ready, and comprises the Si that accounts for total product mass percent 1.0～1.7%, the Fe smaller or equal to 0.5%; 0.15～0.4% Cu, 0.4～1.0% Mn, Cr smaller or equal to 0.1%; 0.5～1.2% Mg, the Zn smaller or equal to 0.25%;
Step 2: in smelting furnace, add aluminium ingot or molten aluminum liquid earlier, heating makes it to melt fully, adds getting the raw materials ready of step 1 earlier by formula rate, makes it to dissolve fully and melt, and 700～1000 ℃ of insulations down, obtains alloy melt after the refining; Melting process is accomplished in enclosed environment;
Step 3: use the mixed gas of nitrogen or rare gas element or nitrogen and rare gas element arbitrary proportion that alloy melt is carried out the degassing and purifying operation, and lasting ventilation finishes until reaction; To account for the A1CrN of total product mass percent 1.07～2.68% simultaneously, 0.99～2.45% RbH powder joins in the alloy melt with above-mentioned gas with the fluidization mode; Stir, A1CrN and RbH are evenly distributed in alloy melt, and fully react with alloy melt; Leave standstill, temperature adjustment to 680～730 ℃, alloy liquid is come out of the stove, and obtains said aldural.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110421185 CN102418011B (en) | 2011-12-15 | 2011-12-15 | High-strength aluminum alloy added with AlCrN and RbH and preparation method of aluminum alloy |
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| CN 201110421185 CN102418011B (en) | 2011-12-15 | 2011-12-15 | High-strength aluminum alloy added with AlCrN and RbH and preparation method of aluminum alloy |
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| CN102418011B CN102418011B (en) | 2013-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105936997A (en) * | 2016-06-29 | 2016-09-14 | 贵州华科铝材料工程技术研究有限公司 | Aluminum alloy material replacing QT500 automobile axle housing and low-pressure casting forming method of aluminum alloy material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526031A (en) * | 2001-07-09 | 2004-09-01 | �Ʒ� | Weldable high strength Al-Mg-Si alloy product |
| CN101048245A (en) * | 2004-10-25 | 2007-10-03 | 昭和电工株式会社 | Continuous casting apparatus, continuous casting method, and aluminum aloy cast rod |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1526031A (en) * | 2001-07-09 | 2004-09-01 | �Ʒ� | Weldable high strength Al-Mg-Si alloy product |
| CN101048245A (en) * | 2004-10-25 | 2007-10-03 | 昭和电工株式会社 | Continuous casting apparatus, continuous casting method, and aluminum aloy cast rod |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105936997A (en) * | 2016-06-29 | 2016-09-14 | 贵州华科铝材料工程技术研究有限公司 | Aluminum alloy material replacing QT500 automobile axle housing and low-pressure casting forming method of aluminum alloy material |
| CN105936997B (en) * | 2016-06-29 | 2018-06-29 | 贵州华科铝材料工程技术研究有限公司 | A kind of aluminum alloy materials and its pressure casting forming method for substituting QT500 automobile axle housings |
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