CN103131916A - High-strength aluminum alloy processed by sodium fluoroaluminate and preparing method of sodium fluoroaluminate - Google Patents
High-strength aluminum alloy processed by sodium fluoroaluminate and preparing method of sodium fluoroaluminate Download PDFInfo
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- CN103131916A CN103131916A CN2011103858595A CN201110385859A CN103131916A CN 103131916 A CN103131916 A CN 103131916A CN 2011103858595 A CN2011103858595 A CN 2011103858595A CN 201110385859 A CN201110385859 A CN 201110385859A CN 103131916 A CN103131916 A CN 103131916A
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Abstract
The invention discloses high-strength aluminum alloy processed by sodium fluoroaluminate and a preparing method of the high-strength aluminum alloy. The high-strength aluminum alloy comprises, by weight, 2.0-3.2% of Cu, not more than 0.2% of Mn, 0.2-0.5% of Mg, not more than 0.01% of Cr, not more than 0.01% of Ni, not more than 0.1% of Zn, not more than 0.15% of Ti, not more than 0.5% of Si, not more than 0.5% of Fe, the sodium fluoroaluminate accounts for 0.05-2.5% of the total mass of furnace materials, and the rest is Al and unavoidable trace impurities. The formula and the preparing method of the high-strength aluminum alloy improve the obdurability, forming property and hardenability of the high-strength aluminum alloy.
Description
Technical field
The present invention relates to a kind of aluminum alloy materials and preparation method thereof, particularly aldural of a kind of aluminium fluoric acid sodium processing and preparation method thereof.
Background technology
The aluminium alloy that deep processing is used often needs at first to be cast as large-scale ingot blank, as slab ingot, pole etc., again by means such as rolling, extruding, forgings, be processed into various finished products, these processes basically all will with the heat treatment phase combination, if to the finished product that can directly use, also will be through operations such as over-segmentation, surface working, Passivation Treatment.These processing means need aluminum alloy materials itself to possess good deep processing performance, comprise castability, press working deformation performance, heat treatment reinforcement performance, corrosion resistance, antifatigue destructive characteristics, surface working and coating property etc.Wherein, founding performance is the basis of aluminium alloy deep processing performance.Large-scale ingot blank, especially the above above pole of slab ingot, slab and diameter 500mm of thickness 500mm, can be the representative base material of Large Efficient deep processing, and be prefabricated into large-scale ingot blank, be also the first technology critical point whether test aluminum alloy materials itself is fit to carry out deep processing.
According to statistics, in the world in 500 various deformation aluminum alloy materials, the aluminium alloy that is usually used in the large-scale ingot blank of founding is less than 20, the aluminium alloy that wherein is most commonly used to the large-scale ingot blank of founding and produces slab has 5083,5026,6082,2017,2024,2219,7075,7050 etc., in these materials, what belong to duralumin and ultralumin category is that 2XXX system and 7XXX are that its slab is multiplex in aerospace industry, 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 associated golden founding better performances, but intensity is low; Other belongs to soft aluminium category as 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 form the technology breakpoint that is difficult to cross in the process of the strong materials of weight such as field of engineering technology instead of steel goods and structure.
Summary of the invention
Technical problem to be solved by this invention is, the problems such as the hardening capacity that the plasticity problem that exists at fusion-casting process for the aluminum current alloy and heat treatment process exist is not high, add aluminium fluoric acid sodium in the Combined Processing mode, reach the deficiency that overcomes aluminium alloy capability, improve its obdurability, plasticity and hardening capacity, for efficient deep processing provides high-end base material.
Technical scheme of the present invention: the aldural that a kind of aluminium fluoric acid sodium is processed, by weight percentage, this alloying constituent is Cu:2.0～3.2%, Mn :≤0.2%, Mg:0.2～0.5%, Cr :≤0.01%, Ni :≤0.01%, Zn :≤0.1%, Ti :≤0.15%, Si :≤0.5%, Fe :≤0.5%, aluminium fluoric acid sodium is 0.05～2.5% of furnace charge total mass, and all the other are Al and inevitable trace impurity.
The aldural that described a kind of aluminium fluoric acid sodium is processed, the physical aspect of above-mentioned aluminium fluoric acid sodium is pulverulent solids, the state of aggregation granularity is the 10-40 order.
The preparation method of the aldural that described a kind of aluminium fluoric acid sodium is processed comprises the steps:
Step 1: in above-mentioned element ratio scope, a selected group element and aluminium fluoric acid sodium, then the alloy total amount of preparation are as required extrapolated the quality of every kind of required elemental metals, establishment alloy production allocation sheet, and get the raw materials ready by allocation sheet choosing foot;
Step 2: first add aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt fully, first adds the selected alloying element of step 1 by formula rate, makes it dissolve fully and melt insulation under 700～1000 ℃ after refining; Melting process is completed in enclosed environment;
Step 3: use the mixed gas of nitrogen or rare gas element or nitrogen and rare gas element, add a small amount of chlorine, melt is carried out the degassing and purifying operation, aluminium fluoric acid sodium powder is joined in alloy melt with gas in the fluidization mode; Stir simultaneously, aluminium fluoric acid sodium is evenly distributed in alloy melt, and fully reacts with alloy melt; Alterant adds complete, continues to pass into protective gas to reacting complete; Standing, temperature adjustment to 680～730 ℃, aluminium alloy is come out of the stove, and enters subsequent processing.
Compared with prior art, the present invention has following major advantage:
The Na that aluminium fluoric acid sodium at high temperature decomposites can make the crystallization of Eutectic Silicon in Al-Si Cast Alloys become fine-grannular by short round needle shape; and reduction eutectic temperature; increase condensate depression; crystal grain thinning; the powder formed carbon nitride has the specific surface area more much bigger than general cake mass in adding the aluminium alloy melt process with the fluidization form with protective gas, can realize disperseing fast and fully contacting with melt; significantly shortened and disperseed and the uniform time, improved its obdurability, plasticity and hardening capacity.
Specific embodiment
Embodiment 1:
The aldural that a kind of aluminium fluoric acid sodium of the present invention is processed, the amount of the metal of concrete formula is: Cu:20kg, Mn:0.1kg, Mg:2kg, Zn:0.1kg, Ti:0.15kg, aluminium fluoric acid sodium (40 order): 25kg, Al:952.65kg; Wherein Si and Fe are the impurity that brings in raw material A l, and control content: Si :≤0.5%, Fe :≤0.5%;
Step 2: first add aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt fully, first adds the selected alloying element of step 1 by formula rate, makes it dissolve fully and melt insulation under 700～1000 ℃ after refining; Melting process is completed in enclosed environment;
Step 3: use the mixed gas of nitrogen or rare gas element or nitrogen and rare gas element, add a small amount of chlorine, melt is carried out the degassing and purifying operation, aluminium fluoric acid sodium powder is joined in alloy melt with gas in the fluidization mode; Stir simultaneously, aluminium fluoric acid sodium is evenly distributed in alloy melt, and fully reacts with alloy melt; Alterant adds complete, continues to pass into protective gas to reacting complete; Standing, temperature adjustment to 680～730 ℃, aluminium alloy is come out of the stove, and enters subsequent processing.
Embodiment 2:
The aldural that a kind of aluminium fluoric acid sodium of the present invention is processed, the amount of the metal of concrete formula is: Cu:32kg, Mn:2kg, Mg:5kg, Cr:0.1kg, Ni:0.1kg, Zn:1kg, Ti:1.5kg, aluminium fluoric acid sodium (10 order): 0.5kg, Al:957.8kg; Wherein Si and Fe are the impurity that brings in raw material A l, and control content exists: Si :≤0.5%, Fe :≤0.5%;
Step 2: first add aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt fully, first adds the selected alloying element of step 1 by formula rate, makes it dissolve fully and melt insulation under 700～1000 ℃ after refining; Melting process is completed in enclosed environment;
Step 3: use the mixed gas of nitrogen or rare gas element or nitrogen and rare gas element, add a small amount of chlorine, melt is carried out the degassing and purifying operation, aluminium fluoric acid sodium powder is joined in alloy melt with gas in the fluidization mode; Stir simultaneously, aluminium fluoric acid sodium is evenly distributed in alloy melt, and fully reacts with alloy melt; Alterant adds complete, continues to pass into protective gas to reacting complete; Standing, temperature adjustment to 680～730 ℃, aluminium alloy is come out of the stove, and enters subsequent processing.
Claims (3)
1. the aldural processed of an aluminium fluoric acid sodium, it is characterized in that: by weight percentage, this alloying constituent is Cu:2.0～3.2%, Mn :≤0.2%, Mg:0.2～0.5%, Cr :≤0.01%, Ni :≤0.01%, Zn :≤0.1%, Ti :≤0.15%, Si :≤0.5%, Fe :≤0.5%, aluminium fluoric acid sodium is 0.05～2.5% of furnace charge total mass, and all the other are Al and inevitable trace impurity.
2. the aldural processed of a kind of aluminium fluoric acid sodium according to claim 1, it is characterized in that: the physical aspect of above-mentioned aluminium fluoric acid sodium is pulverulent solids, the state of aggregation granularity is the 10-40 order.
3. the preparation method of the aldural of a kind of aluminium fluoric acid sodium processing according to claim 1, is characterized in that: comprise the steps:
Step 1: in above-mentioned element ratio scope, a selected group element and aluminium fluoric acid sodium, then the alloy total amount of preparation are as required extrapolated the quality of every kind of required elemental metals, establishment alloy production allocation sheet, and get the raw materials ready by allocation sheet choosing foot;
Step 2: first add aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt fully, first adds the selected alloying element of step 1 by formula rate, makes it dissolve fully and melt insulation under 700～1000 ℃ after refining; Melting process is completed in enclosed environment;
Step 3: use in nitrogen to add a small amount of chlorine, melt is carried out the degassing and purifying operation, aluminium fluoric acid sodium powder is joined in alloy melt with gas in the fluidization mode; Stir simultaneously, aluminium fluoric acid sodium is evenly distributed in alloy melt, and fully reacts with alloy melt; Alterant adds complete, continues to pass into protective gas to reacting complete; Standing, temperature adjustment to 680～730 ℃, aluminium alloy is come out of the stove, and enters subsequent processing.
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| CN201110385859.5A CN103131916B (en) | 2011-11-29 | 2011-11-29 | High-strength aluminum alloy processed by sodium fluoroaluminate and preparing method of sodium fluoroaluminate |
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| CN201110385859.5A CN103131916B (en) | 2011-11-29 | 2011-11-29 | High-strength aluminum alloy processed by sodium fluoroaluminate and preparing method of sodium fluoroaluminate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101410540A (en) * | 2005-09-07 | 2009-04-15 | 美铝公司 | 2000 series alloys with enhanced damage tolerance performance for aerospace applications |
| CN101768681A (en) * | 2009-05-13 | 2010-07-07 | 陈月丹 | Composite modifying and refining agent for casting aluminium and silicon alloy |
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| CN101410540A (en) * | 2005-09-07 | 2009-04-15 | 美铝公司 | 2000 series alloys with enhanced damage tolerance performance for aerospace applications |
| CN101768681A (en) * | 2009-05-13 | 2010-07-07 | 陈月丹 | Composite modifying and refining agent for casting aluminium and silicon alloy |
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