CN103131879A - Aluminum alloy metamorphism processing method - Google Patents
Aluminum alloy metamorphism processing method Download PDFInfo
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- CN103131879A CN103131879A CN2011103858608A CN201110385860A CN103131879A CN 103131879 A CN103131879 A CN 103131879A CN 2011103858608 A CN2011103858608 A CN 2011103858608A CN 201110385860 A CN201110385860 A CN 201110385860A CN 103131879 A CN103131879 A CN 103131879A
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Abstract
The invention discloses an aluminum alloy metamorphism processing method. The aluminum alloy metamorphism processing method uses Na2TiO3 as alterant, and includes a step 1 of carrying out furnace refining on melt alloy, adding refining agent into the melt alloy, evenly mixing the melt alloy, and carrying out melt refining in an enclosed environment; a step 2 of carrying out gas removal operation with protective gas after refining deslagging, enabling the alterant Na2TiO3 to be added into the melt alloy in a fluidized mode along with the protective gas at the same time, carrying out stirring at the same time to enable the alterant to fully react with the melt alloy, and adding the protective gas continuously after the alterant is added until full reaction of the alterant is finished; and a step 3 of standing and regulating the temperature to 700-800 DEG C, pouring the melt alloy out of a furnace, and carrying out a next procedure. According to the aluminum alloy metamorphism processing method, the alterant has the performances of nucleus alterant and adsorption alterant, can be diffused in the melt alloy rapidly, restrain the growth of a crystal nucleus, refines material points, and is high in the utilization rate.
Description
Technical field
The present invention relates to a kind of rotten method of aluminium alloy.
Background technology
The industrial method of rotten processing that usually adopts is come refining aluminum alloy crystal grain, and in production, alterant commonly used has type core alterant and absorption alterant.The mechanism of action of type core alterant is to add the material that some can spontaneous generation non-spontaneous nucleation in molten aluminium, makes it reach the purpose of crystal grain thinning by heterogeneous type core in process of setting.Ti is the type core alterant of commonly using, and Ti can form TiAl in aluminium liquid
3The refinement particle, thinning microstructure.The adsorptive type alterant is mainly used in the rotten processing of silumin, and its mechanism of action is that the atomic radius of alterant element is large, and solid solution capacity is little in alloy, is enriched on phase interface when crystal is grown, and hinders crystal and reaches, and can form larger constitutional supercooling again.Na is the adsorptive type alterant of commonly using, and when the aluminium alloy solution temperature dropped near the liquidus temperature of aluminium, the solubleness of sodium reduced, separate out a large amount of highly dispersed sodium colloid particles, be adsorbed in the nucleating surface of silicon, form thin film, hinder growing up of crystal, silicon crystallization condensate depression is increased.
Present industrial type core alterant adds melt mainly with the master alloy form greatly, Ti normally adds with the Al-Ti-B master alloy, use and thisly add method there are the following problems: the one, for energy-conservation unfavorable, the founding link that contains the master alloy of high density alterant element needs very high temperature (＞1000 ℃); Add master alloy during aluminium alloy smelting, " dissolving " also " dilution " alterant element casts again, how this process has been equivalent to " melting-casting " link, and in master alloy, a large amount of aluminium only plays the effect that stores alterant element, and its energy that consumes is invalid fully; The 2nd, the 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, but 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, limiting the quantity of for impurity requires very strict high performance alloys production, and 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.
The adsorptive type alterant adds with the form of compound usually, and Na is that the mixture by sodium salt adds melt, and that work in mixture is NaF.This problem that adds method to exist is: the molecular weight of different sodium salts is different, add the add-on of bad control Na with mixture, and NaF is poisonous, affects the operator healthy.
Summary of the invention
The technical problem to be solved in the present invention:
For the existing problem of present aluminium alloy casting mesometamorphism method, the invention provides a kind of employing Na
2TiO
3Metamorphism treatment method as alterant.
Technical scheme of the present invention:
A kind of metamorphism treatment method of aluminium alloy uses Na
2TiO
3As alterant, specifically comprise the following steps:
Step 1: the alloy melt carries out furnace refining; Add refining agent in alloy melt, and stir, the melt refining operates in enclosed environment;
Step 2: after the refining slagging-off, with protective gas, melt is carried out the degasification operation, alterant Na2TiO3 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 3: standing, temperature adjustment to 700～800 ℃, aluminium alloy are toppled over and are come out of the stove, and enter subsequent processing.
Na
2TiO
3The add-on of alterant is the 1ppm～0.1% of furnace charge total amount.
In step 2, protective gas refers to the mixed gas of nitrogen, argon gas or nitrogen and argon gas.
Beneficial effect of the present invention:
1, save this link of making master alloy, avoided meaningless waste, reduced the smelting link.
2, Na
2TiO
3Decomposite the Ti of atomic state under molecular crystal high temperature, seed sphere of action with microcosmic micromicron level (pm), reach be beyond one's reach microtexture state and nano level (nm) state of aggregation when adding pure metal or master alloy, form the Al-Ti phase in melt, the refinement crystal improves mechanical property and the corrosion resistance nature of alloy.
3, Na
2TiO
3Decomposite the Na of atomic state under molecular crystal high temperature, as the absorption alterant, suppress the nucleus growth of silicon.
4, the alterant consumption is few, and modification effect is high, and excessive and not enough performance characteristic is obvious, thereby easily accurately grasps consumption.
5, alterant adds melt in the fluidization mode, can be diffused in rapidly and uniformly in melt, and utilising efficiency is very high.
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, extrapolate the weight of every kind of required material.
Step 2: first 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 the protective gas argon gas, melt is carried out the degasification operation, make simultaneously Na
2TiO
3Join in alloy melt with the protective gas argon 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 ℃, aluminium alloy are toppled over and are come out of the stove, and enter subsequent processing.
Claims (3)
1. the metamorphism treatment method of an aluminium alloy, is characterized in that: use Na
2TiO
3As alterant, specifically comprise the following steps:
Step 1: the alloy melt carries out furnace refining; Add refining agent in alloy melt, and stir, the melt refining operates in enclosed environment;
Step 2: after the refining slagging-off, with protective gas, melt is carried out the degasification operation, make simultaneously alterant Na
2TiO
3Join 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 3: standing, temperature adjustment to 700～800 ℃, aluminium alloy are toppled over and are come out of the stove, and enter subsequent processing.
2. the metamorphism treatment method of aluminium alloy according to claim 1, is characterized in that: Na
2TiO
3The add-on of alterant is the 1ppm～0.1% of furnace charge total amount.
3. the metamorphism treatment method of aluminium alloy according to claim 1, it is characterized in that: in step 2, protective gas refers to the mixed gas of nitrogen, argon gas or nitrogen and argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103858608A CN103131879A (en) | 2011-11-29 | 2011-11-29 | Aluminum alloy metamorphism processing method |
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| CN2011103858608A CN103131879A (en) | 2011-11-29 | 2011-11-29 | Aluminum alloy metamorphism processing method |
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| CN103131879A true CN103131879A (en) | 2013-06-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105936996A (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 hub and liquid forging forming method of aluminum alloy material |
| CN105936998A (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 QT450 automobile turbocharger shell and sand casting forming method of aluminum alloy material |
| CN105936995A (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 QT400 automobile control arm and semi-solid state die-casting forming method of aluminum alloy material |
| CN106119635A (en) * | 2016-06-29 | 2016-11-16 | 贵州华科铝材料工程技术研究有限公司 | A kind of replacement QT400 aluminium alloy flywheel caliper material and gravitational casting forming method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215087A (en) * | 1998-09-25 | 1999-04-28 | 清华大学 | Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy |
| CN1312396A (en) * | 2000-12-29 | 2001-09-12 | 刘庆德 | Production process of fast solidified granular metal fining modifier for aluminium alloy |
-
2011
- 2011-11-29 CN CN2011103858608A patent/CN103131879A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1215087A (en) * | 1998-09-25 | 1999-04-28 | 清华大学 | Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy |
| CN1312396A (en) * | 2000-12-29 | 2001-09-12 | 刘庆德 | Production process of fast solidified granular metal fining modifier for aluminium alloy |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105936996A (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 hub and liquid forging forming method of aluminum alloy material |
| CN105936998A (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 QT450 automobile turbocharger shell and sand casting forming method of aluminum alloy material |
| CN105936995A (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 QT400 automobile control arm and semi-solid state die-casting forming method of aluminum alloy material |
| CN106119635A (en) * | 2016-06-29 | 2016-11-16 | 贵州华科铝材料工程技术研究有限公司 | A kind of replacement QT400 aluminium alloy flywheel caliper material and gravitational casting forming method thereof |
| CN105936998B (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 replacement aluminum alloy materials of QT450 automobile turbocharger housings and its sand casting forming method |
| CN106119635B (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 replacement QT400 aluminium alloys flywheel caliper material and its gravitational casting forming method |
| CN105936995B (en) * | 2016-06-29 | 2019-03-08 | 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 semisolid pressure casting forming method substituting QT400 automobile control arm |
| CN105936996B (en) * | 2016-06-29 | 2019-03-12 | 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 liquid forging forming method substituting QT500 automotive hub |
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