CN103131901A - Aluminum alloy material containing degenerative cobalt complexes and preparation method thereof - Google Patents
Aluminum alloy material containing degenerative cobalt complexes and preparation method thereof Download PDFInfo
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- CN103131901A CN103131901A CN 201110385899 CN201110385899A CN103131901A CN 103131901 A CN103131901 A CN 103131901A CN 201110385899 CN201110385899 CN 201110385899 CN 201110385899 A CN201110385899 A CN 201110385899A CN 103131901 A CN103131901 A CN 103131901A
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Abstract
The invention discloses an aluminum alloy material containing degenerative cobalt complexes. According to the weight percentage, the components of the aluminum alloy include: 0.05%-0.35% of copper (Cu), manganese (Mn) smaller than or equal to 0.01%, magnesium (Mg) smaller than or equal to 0.2%, chromium (Cr) smaller than or equal to 0.01%, zinc (Zn) smaller than or equal to 0.05%, boron (B) smaller than or equal to 0.05%, calcium (Ca) smaller than or equal to 0.03%, vanadium + titanium (V+Ti) smaller than or equal to 0.02%, silicon (Si) smaller than or equal to 0.1%, and ferrum (Fe) smaller than or equal to 0.4%, and the other components are aluminum (Ai) and inevitable trace impurities, and the content of impurity elements is single impurity element smaller than or equal to 0.03%, and the total is smaller than or equal to 0.1%. Complex alterant containing cobalt is 1 part per million (ppm)-1.0% of the total quantity of furnace burden. The aluminum alloy material containing the degenerative cobalt complexes and a preparation method thereof solve the problems generated due to the fact that intermediate alloy is used as the alterant in the aluminum alloy casting process.
Description
Technical field
The present invention relates to aluminum alloy materials and preparation thereof, relate in particular to a kind of to contain cobalt complex rotten aluminum alloy materials and preparation thereof.
Background technology
Metamorphism can greatly improve comprehensive mechanical performance and the chemical stability index of aluminium alloy, sometimes or even subversive.Can produce metamorphic material and be called alterant.
In aluminium alloy casting process, for comprehensive mechanical performance and the chemical stability index that improves aluminum alloy casting, need to add alterant to improve mechanical property and the chemical stability of aluminum alloy casting, aluminium alloy in the middle of the alterant that adopts at present all adopts in aluminium alloy casting process.But master alloy has following shortcoming due to the characteristic of self:
(1) at high temperature chemical composition is constant, and enough stability is arranged in molten aluminium;
(2) fusing point of additive should be than the height of aluminium;
(3) lattice of additive and aluminium should adapt on scantlings of the structure;
(4) form powerful adsorption bond with processed melt atom.
(5) effective element in the aluminium intermediate alloy alterant is difficult to play one's part to the full.
Although the matrix of master alloy is also aluminium, when producing master alloy, the process of high-melting-point element, indissoluble solution element and aluminium generation alloying is very rambunctious: the scaling loss amount increase of the segregation of effective element, aluminium and sneaking into of a large amount of impurity, all can hardly be avoided.Limit the quantity of for impurity and require very strict high performance alloys production, often the impurity brought into of alterant just is enough to make Chemical Composition surpass limited field; Simultaneously, under microstate, a large amount of effective alterant elements of assembling still are in homojunction colony bulk state, (＜800 ℃) can't dissolve fully and melt at all at the temperature of molten aluminum, only have surface rete as thin as a wafer to play the part metamorphism owing to may producing alloying reaction with aluminium, all the other a large amount of state of aggregations are all just how to add how to exist, metamorphism thereby have a greatly reduced quality.
In actual production, the problem that often occurs is that the rotten ability of alterant is unstable, the ratio fluctuation range that alterant adds is large, be not easy accurately to grasp addition, the as easy as rolling off a log harmful element of sneaking in the aluminium intermediate alloy process of making the high temperature element, have a significant impact end product quality simultaneously.
Summary of the invention
Technical problem to be solved by this invention:
Provide a kind of to contain rotten aluminum alloy materials of cobalt complex and preparation method thereof, in solution aluminum alloy materials castingprocesses, the problem that adopts master alloy to produce as alterant, as:
1. limit the quantity of for impurity and require very strict high performance alloys production, the impurity effect aluminium alloy casting performance issue that alterant is brought into.
2. (＜800 ℃) master alloy can't dissolve fully and melt at the temperature of molten aluminum, only have surface rete as thin as a wafer to play the part metamorphism owing to may producing alloying reaction with aluminium, all the other a large amount of state of aggregations are all just how to add how to exist, metamorphism thereby the problem such as have a greatly reduced quality.
3. because the rotten ability of master alloy alterant is unstable, alterant additional proportion fluctuation range is large, is not easy accurately to grasp the problems such as addition.
Technical scheme of the present invention:
A kind of to contain the rotten aluminum alloy materials of cobalt complex, by weight percentage, this alloying constituent is Cu 0.05～0.35%, Mn≤0.01%, Mg≤0.2%, Cr≤0.01%, Zn≤0.05%, B≤0.05%, Ca≤0.03%, V+Ti≤0.02%, Si≤0.1%, Fe≤0.4, all the other are Al and inevitable trace impurity, and impurity content is: single≤0.03% adds up to≤0.1%; Contain the 1ppm that the cobalt complex alterant is the furnace charge total amount～1.0%.
Si, Fe constituent content satisfy: Fe/ Si≤4.
Contain cobalt complex and comprise one or more Na in following title complex
4[Co (CO)], Co
2(CO)
8The molecular crystal state of aggregation granularity of cobalt complex alterant is 20～300 orders.
To contain the preparation method of the rotten aluminum alloy materials of cobalt complex, comprise the steps:
Step 1: in above-mentioned element ratio scope, a selected group element and contain cobalt complex alterant ratio, then the aluminium 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: add aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt fully and insulation under 700～800 ℃; Melting process is completed in enclosed environment;
Step 3: first add the selected alloying element of step 1 by formula rate again, make it dissolve fully and melt, mixed melt is stirred;
Step 4: then above-mentioned alloy melt is carried out furnace refining; Add refining agent in alloy melt, and stir, the melt refining operates in enclosed environment;
Step 5: after the refining slagging-off, with protective gas, melt is carried out the degasification operation, the cobalt complex alterant is joined in alloy melt with protective gas in the fluidization mode; Stir simultaneously, alterant and alloy melt are fully reacted; Alterant adds complete, continues to pass into protective gas complete to the alterant reaction.
Step 6: standing, temperature adjustment to 700～800 ℃, kept 5 to 10 minutes at this temperature, aluminium alloy is toppled over and is come out of the stove, and enters subsequent processing.
A kind of to contain the preparation method of the rotten aluminum alloy materials of cobalt complex, protective gas refers to the mixed gas of nitrogen, argon gas or nitrogen and argon gas.
Beneficial effect of the present invention:
Compared with prior art, the present invention has following major advantage:
1. found a kind of new efficient alterant: to contain cobalt complex as alterant, changed the metamorphic mechanism of conventional aluminum alloy inoculant.
2. not only improved the modification effect of aluminum alloy modifier, controlled for efficient in producing, high precision and created condition, and cobalt complex Na
4[Co (CO)], Co
2(CO)
8Resolve into the CO element and can absorb harmful elements such as H, O in melt in solution, purify melt, thereby the effect of alterant and scavenging agent is organically combined.
In cobalt complex contained Na, the effective refinement of Co element aluminum substrate crystal grain and the metallic compound crystal grain such as Fe, Si, having significantly improved pure aluminum alloy is intensity and unit elongation performance.
4. replacement master alloy is conducive to create the intensive production line of " nearly moulding, short flow process ", and is energy-saving and cost-reducing, reduces comprehensive cost.
Particularly, the present invention has the following advantages.
Title complex melting temperature of the present invention is low, makes the agent of aluminium liquid fusion process mesometamorphism no longer be subjected to the conventional need restriction of " under alterant high temperature, chemical composition is constant, and enough stability is arranged " in molten aluminium.
The present invention adopts cobalt complex molecular crystal powdery alterant to join in molten aluminium, decomposites effective alterant element Na, Co with molten aluminium generation chemical reaction and adsorbs by force the Active Radicals Produced CO-of H, O
Wherein the Na element can be slightly soluble in aluminium liquid, when solution temperature is reduced near the liquidus temperature of aluminium, the solubleness of sodium in aluminium liquid further reduces, at this moment separate out a large amount of highly dispersed sodium colloid particles in aluminium liquid, be adsorbed in the nucleating surface of silicon in aluminium liquid, form the film of one deck Na, hindered growing up of silicon crystal, silicon crystallization condensate depression is increased, realize rotten effect.
The Co element is produced Co with aluminium in aluminium liquid
2Al
9, Co
4Al
13, CoAl
3, Co
2Al
5Deng the strengthening phase material, first to separate out than aluminium liquid when crystallization, these metallicses are evenly distributed in the middle of aluminium, generate nucleus, play the effect of reinforced aluminium alloy, improve mechanical property and the mechanical property of aluminium alloy.
Cobalt complex of the present invention is substantially free from foreign meter, adds as alterant, and having solved limits the quantity of for impurity requires very strict high performance alloys production, the impurity effect aluminium alloy casting performance issue that alterant is brought into.
Cobalt complex fusing point of the present invention is lower than the temperature of smelting aluminum, can dissolve fully in aluminium liquid and play metamorphism, having solved master alloy can't can't dissolve fully and melt by (＜800 ℃) master alloy at the temperature at molten aluminum as alterant, only have surface rete as thin as a wafer to play the part metamorphism owing to may producing alloying reaction with aluminium, all the other a large amount of state of aggregations are all just how to add how to exist, metamorphism thereby the problem such as have a greatly reduced quality.
The present invention adds aluminium liquid with cobalt complex as alterant, because the establishment ability is stable, the cobalt complex alterant additional proportion that adds is constant, has solved the rotten ability of master alloy alterant unstable, alterant additional proportion fluctuation range is large, is not easy accurately to grasp the problems such as addition.
And contained Active Radicals Produced CO-in cobalt complex alterant of the present invention, can absorb and remove the detrimental impurity such as H and O element in melt, reach simultaneously the purpose that purifies melt.
Embodiment
Step 1: the selected every element of according to the form below and material formula, and by the alloy total amount 1000kg for preparing, calculate the weight of every kind of required material.
And get the raw materials ready by allocation sheet choosing foot;
Step 2: add aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt fully and insulation under 700～800 ℃; Melting process is completed in enclosed environment;
Step 3: first add the selected alloying element of step 1 by formula rate again, make it dissolve fully and melt, mixed melt is stirred;
Step 4: then above-mentioned alloy melt is carried out furnace refining; Add refining agent in alloy melt, and stir, the melt refining operates in enclosed environment;
Step 5: after the refining slagging-off, with protective gas, melt is carried out the degasification operation, the cobalt complex alterant is joined in alloy melt with protective gas in the fluidization mode; Stir simultaneously, alterant and alloy melt are fully reacted; Alterant adds complete, continues to pass into protective gas complete to the alterant reaction.
Step 6: standing, temperature adjustment to 700～800 ℃, kept 5 to 10 minutes at this temperature, aluminium alloy is toppled over come out of the stove, enter subsequent processing.
The ratio of each embodiment each material in step 1 and actual varying in weight of allocating into, all the other steps of each embodiment are identical.
Claims (6)
1. one kind to contain the rotten aluminum alloy materials of cobalt complex, and it is characterized in that: by weight percentage, this alloying constituent is Cu 0.05～0.35%, Mn≤0.01%, Mg≤0.2%, Cr≤0.01%, Zn≤0.05%, B≤0.05%, Ca≤0.03%, V+Ti≤0.02%, Si≤0.1%, Fe≤0.4, all the other are Al and inevitable trace impurity, and impurity content is: single≤0.03% adds up to≤0.1%; Contain the 1ppm that the cobalt complex alterant is the furnace charge total amount～1.0%.
2. according to claim 1 to contain the rotten aluminum alloy materials of cobalt complex, it is characterized in that: Si, Fe constituent content satisfy: Fe/ Si≤4.
3. according to claim 1 to contain the rotten aluminum alloy materials of cobalt complex, it is characterized in that: contain cobalt complex and comprise one or both mixture Na in following title complex
4[Co (CO)], Co
2(CO)
8
4. according to claim 1 to contain the rotten aluminum alloy materials of cobalt complex, it is characterized in that: the molecular crystal state of aggregation granularity of cobalt complex alterant is 20～200 orders.
5. as claimed in claim 1 to contain the preparation method of the rotten aluminum alloy materials of cobalt complex, it is characterized in that: comprise the steps:
Step 1: in above-mentioned element ratio scope, a selected group element and contain cobalt complex alterant ratio, then the aluminium 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: add aluminium ingot or molten aluminum liquid in smelting furnace, heating makes it to melt fully and insulation under 700～800 ℃; Melting process is completed in enclosed environment;
Step 3: first add the selected alloying element of step 1 by formula rate again, make it dissolve fully and melt, mixed melt is stirred;
Step 4: then above-mentioned alloy melt is carried out furnace refining; Add refining agent in alloy melt, and stir, the melt refining operates in enclosed environment;
Step 5: after the refining slagging-off, with protective gas, melt is carried out the degasification operation, the cobalt complex alterant is joined in alloy melt with protective gas in the fluidization mode; Stir simultaneously, alterant and alloy melt are fully reacted; Alterant adds complete, continues to pass into protective gas complete to the alterant reaction;
Step 6: standing, temperature adjustment to 700～800 ℃, kept 5 to 10 minutes at this temperature, aluminium alloy is toppled over come out of the stove, enter subsequent processing.
6. according to claim 5 to contain the preparation method of the rotten aluminum alloy materials of cobalt complex, it is characterized in that: in step 5, protective gas refers to the mixed gas of nitrogen, argon gas or nitrogen and argon gas.
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| CN 201110385899 CN103131901A (en) | 2011-11-29 | 2011-11-29 | Aluminum alloy material containing degenerative cobalt complexes and preparation method thereof |
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|---|---|---|---|
| CN 201110385899 CN103131901A (en) | 2011-11-29 | 2011-11-29 | Aluminum alloy material containing degenerative cobalt complexes and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299670A (en) * | 2014-09-15 | 2015-01-21 | 安徽欣意电缆有限公司 | Al-Fe-Cu-Mn aluminum alloy for coal mine cable and aluminum alloy cable |
| CN104599736A (en) * | 2015-01-31 | 2015-05-06 | 安徽华纳合金材料科技有限公司 | Ferro-aluminum alloy wire with boron and manufacturing method thereof |
| CN105316535A (en) * | 2015-01-31 | 2016-02-10 | 安徽华纳合金材料科技有限公司 | Copper-containing ferro-aluminum alloy wire and fabrication method thereof |
-
2011
- 2011-11-29 CN CN 201110385899 patent/CN103131901A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104299670A (en) * | 2014-09-15 | 2015-01-21 | 安徽欣意电缆有限公司 | Al-Fe-Cu-Mn aluminum alloy for coal mine cable and aluminum alloy cable |
| CN104599736A (en) * | 2015-01-31 | 2015-05-06 | 安徽华纳合金材料科技有限公司 | Ferro-aluminum alloy wire with boron and manufacturing method thereof |
| CN105316535A (en) * | 2015-01-31 | 2016-02-10 | 安徽华纳合金材料科技有限公司 | Copper-containing ferro-aluminum alloy wire and fabrication method thereof |
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Application publication date: 20130605 |