CN1088996A - A kind of novel master alloy fining agent - Google Patents
A kind of novel master alloy fining agent Download PDFInfo
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- CN1088996A CN1088996A CN93114567A CN93114567A CN1088996A CN 1088996 A CN1088996 A CN 1088996A CN 93114567 A CN93114567 A CN 93114567A CN 93114567 A CN93114567 A CN 93114567A CN 1088996 A CN1088996 A CN 1088996A
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Abstract
The present invention is a kind of fine particle TiAl that contains
3, TiB
2, the TiC particle aluminium base master alloy fining agent.This alloy is as the grain refining of aluminium and aluminium alloy.Under the same process condition, in molten aluminium stove, add fining agent of the present invention and in stove, keep still satisfying in 10 hours the requirement of grain refining.In by the refinement aluminium alloy, contain Zr, Mn, during elements such as Cr, fining agent of the present invention still can play refining effect, and is not poisoned by these elements.Under the situation of equal thinning effect, the add-on of Ti can reduce half, has saved titanium resource and has avoided generating the danger that macrobead contains the Ti inclusion again.
Description
The present invention relates to the fine grain TiAl that is loaded with of a kind of refinement aluminium and aluminium alloy crystal grain
3, TiB
2, the TiC particle novel aluminium based master alloy fining agent.
Present widely used fining agent mostly is master alloy.Usefulness has Al-Ti, an Al-Ti-B master alloy the earliest.Adopt appropriate method to add the grain-refining agent of q.s, can avoid strand to crack and cold shut, prevent the appearance of feather crystalline substance, reduce casting flaws such as segregation, thereby improve the processing technology and the usability of aluminium alloy.
A large amount of theoretical investigationes shows that the grain-refining agent refinement aluminium that contains Ti and the mechanism of aluminium alloy crystal grain have two: (one) Peritectic Reaction theory, L(liquid)+TiAl
3→ α-Al; (2) heterogeneous forming core theory, TiB
2, TiC phase particle is as the crystallization nuclei of α-Al.Refinement mechanism is not also obtained unified view in further investigation.But above-mentioned theory is for the development as the master alloy of fining agent, produce and use and played positive pushing effect, by a kind of theory in back, people successfully develop Al-Ti-C master alloy fining agent in recent years, the detailed performance of this master alloy is close with original Al-Ti-B master alloy fining agent, be much better than Al-Ti master alloy fining agent, also reduced the add-on of Ti; It has also overcome Al-Ti-B master alloy fining agent easily by Zr simultaneously, Mn, and the shortcoming that elements such as Cr poison, still, all there is the shortcoming of easy decay in above-mentioned three kinds of fining agents, keep promptly losing more than 2 hours refining effect in the stove.See U.S. Pat 748001 and Metall.Trans. for details, 1986, vol17AP2127.By observation, notice the forming core particle TiAl that they are contained to Al-Ti-B and Al-Ti-C master alloy microstructure
3Phase size is bigger.As in the Al-Ti-B master alloy, block TiAl
3The phase average size is greater than 20 μ m, sheet TiAl
3The phase average size is greater than 50 μ m; In the Al-Ti-C master alloy, sheet TiAl
3Phase size is greater than 50 μ m.These TiAl
3The size of phase is TiB
2, the TiC phase size several times, and even tens of times, these large-sized potential crystallization nuclei (TiAl
3Phase) weakens the refinement efficient of master alloy, its subsidence rate in aluminium water is increased, reduced the antidamping ability.Because TiAl
3Particle is thick, has also played the effect of harmful inclusion sometimes and influences by the metallurgical quality of the aluminiums such as thin plate of refinement.
Master alloy of the present invention is identical with US4873054 in the element classification, but the quantity of the content of the element in the U.S. Pat 4748001, forming core particle, size is all completely different with master alloy of the present invention, because forming core particle TiB
2, TiC quantity reduces its TiAl
3Phase size is thick, so the antidamping ability weakens, thinning effect is low, and its application surface only is limited in certain aluminium processing.
The objective of the invention is is to overcome above-mentioned defective, and a kind of tiny second phase (TiAl that contains simultaneously is provided
3, TiB
2, TiC etc.) the master alloy fining agent of particle, it is begun degradation period prolongs to adding in molten aluminium stove, refining effect kept more than 8 hours, added fashionable can at leisure aluminium in the stove all the cast in the stove and finished the novel master alloy fining agent that still undamped phenomenon occurs.
Purpose of the present invention realizes like this.
Master alloy fining agent of the present invention contains a large amount of small and dispersed distribution TiAl simultaneously
3, TiB
2, TiC three kinds of forming core particles, wherein TiAl
3Phase particle mean sizes is less than 10 μ m, TiB
2With TiC mutually the particle mean sizes less than 5 μ m.
The Chemical Composition of master alloy fining agent of the present invention (by weight percentage) is 2-12%Ti, 0.1-1.2%C, and 0.1-1.0%B, surplus is aluminium and common trace impurity.
The various constituent element content of the composition of master alloy fining agent of the present invention (weight percent) meet following relation each other: (%C+%B) 〉=0.5%, %Ti-4(%C)-2.2(%B) 〉=0.5%.
Master alloy fining agent of the present invention is shaped as: ingot bar shape, thread, granular and powdery.
The fining agent that meets master alloy composition proportion of the present invention, contain potential nucleus size and satisfied specialized range of the present invention, its refining effect just can keep long-acting (more than 8 hours), efficient (add-on reduces more than one times, can reach the effect of existing fining agent).Do not have and poison (the energy refinement contains Zr, Mn, the aluminium alloy of elements such as Cr) effect.
Adopt the aluminium and the aluminium alloy of master alloy fining agent of the present invention refinement, temperature fluctuation during cast, time length does not all have influence to slab quality, after the refinement, organizes even and finely, and calendering technology improves, and extruded velocity can double, and prolongs 2-4 die life doubly.Processing back Rolled Aluminum Material Surface Quality improves, and has eliminated surface imperfection, and tinctorial property also improves.And can when not reducing plasticity, improve the yield strength of aluminium.The embodiment of novel master alloy fining agent of the present invention is as follows:
Embodiment one, alloy of the present invention (by weight) 5%Ti, 0.4%, C, the 0.5%B surplus is aluminium and trace impurity, through scanning electron microscopic observation, TiAl
3Phase size is on average less than 8 μ m, TiB
2With TiC mean sizes mutually all less than 2.5 μ m.With this alloy refinement commercial-purity aluminium, carry out the thinning effect test.Test is to use the 3KW resistance furnace.With being warming up to the aluminium fusing in 200 milliliters the corundum crucible, the Control for Kiln Temperature instrument is decided pin and is referred at 725 ℃, the calibrated temperature difference is ± 5 ℃, during to 725 ℃, the 0.1 gram master alloy of the present invention that weighs up is added in the aluminium water, stirs gently, after stirring for several times, remain in the pig mold of the φ 30 * 50mm that was cast in room temperature in 5 minutes, 20 millimeters are cut from the distance bottom, and tangent plane is made metallographic specimen, measurement crystalline flour size, drawing mean sizes is 100 μ m.(be equivalent under the similarity condition, the thinning effect when adding 0.2 gram acquisition grain-size average out to, 200 μ m with the Al-5Ti-1B master alloy, promptly thinning effect is equivalent to improve 4 times).
Example two: 6063 alloys are carried out type approval test at 6 tons of smelting furnaces.Add of the present invention alloy 3 kilogram (be equivalent to weight percent 0.05%) identical with composition in the example one, after the adding,, begin to come out of the stove after 8 hours 725 ℃ of stops, gone out up to aluminium water, in the end, middle and cast rod foremost and get macroscopical test piece respectively, to observe, grain fineness number all reaches 1 grade, same test triplicate, the effect unanimity that obtains.
Claims (4)
1, a kind of a kind of novel master alloy fining agent that is used for refinement aluminium and aluminium alloy crystal grain is characterized in that containing the TiAl that a large amount of small and disperseds distribute
3, TiB
2, TiC three kinds of forming core particles, wherein TiAl
3Phase particle mean sizes is less than 10 μ m, TiB
2With TiC mutually the particle mean sizes less than 5 μ m.
2, by the described a kind of novel master alloy fining agent of claim 1, it is characterized in that: contain 2-12%Ti in the composition (by weight percentage), 0.1-1.2%C, 0.1-1.0%B, surplus is aluminium and common trace impurity.
3,, it is characterized in that by claim 1 and 2 described a kind of novel master alloy fining agents: the various constituent element content of alloying constituent (weight percent) meet following relation each other: (%C+%B) 〉=0.5%, %Ti-4(%C)-2.2(%B) 〉=0.5%.
4, by the described a kind of novel master alloy fining agent of claim 2, it is characterized in that: be shaped as ingot bar shape, thread, granular and powdery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93114567A CN1088996A (en) | 1993-11-18 | 1993-11-18 | A kind of novel master alloy fining agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93114567A CN1088996A (en) | 1993-11-18 | 1993-11-18 | A kind of novel master alloy fining agent |
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|---|---|
| CN1088996A true CN1088996A (en) | 1994-07-06 |
Family
ID=4990530
Family Applications (1)
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|---|---|---|---|
| CN93114567A Pending CN1088996A (en) | 1993-11-18 | 1993-11-18 | A kind of novel master alloy fining agent |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064088C (en) * | 1998-09-25 | 2001-04-04 | 清华大学 | Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy |
| CN1081244C (en) * | 1998-09-25 | 2002-03-20 | 清华大学 | Composite crystal grain fining agent for aluminium and aluminium alloy and preparation process thereof |
| CN101392308B (en) * | 2007-09-22 | 2011-03-09 | 鞍钢股份有限公司 | Molten steel deoxygenation method for thinning solidification structure |
| CN103192064A (en) * | 2013-04-25 | 2013-07-10 | 丹阳百斯特新型合金科技有限公司 | Al-Ti-B-C refiner and preparation method |
| CN105018796A (en) * | 2014-05-02 | 2015-11-04 | 现代自动车株式会社 | High-elasticity aluminum alloy and method of manufacturing the same |
| CN106591617A (en) * | 2016-12-22 | 2017-04-26 | 哈尔滨东盛金属材料有限公司 | Manganese additive for aluminum alloy and preparation method of manganese additive |
| CN113106301A (en) * | 2021-03-15 | 2021-07-13 | 山东滨州华创金属有限公司 | Preparation process of aluminum-titanium-boron-carbon grain refiner and refiner prepared by same |
-
1993
- 1993-11-18 CN CN93114567A patent/CN1088996A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064088C (en) * | 1998-09-25 | 2001-04-04 | 清华大学 | Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy |
| CN1081244C (en) * | 1998-09-25 | 2002-03-20 | 清华大学 | Composite crystal grain fining agent for aluminium and aluminium alloy and preparation process thereof |
| CN101392308B (en) * | 2007-09-22 | 2011-03-09 | 鞍钢股份有限公司 | Molten steel deoxygenation method for thinning solidification structure |
| CN103192064A (en) * | 2013-04-25 | 2013-07-10 | 丹阳百斯特新型合金科技有限公司 | Al-Ti-B-C refiner and preparation method |
| CN105018796A (en) * | 2014-05-02 | 2015-11-04 | 现代自动车株式会社 | High-elasticity aluminum alloy and method of manufacturing the same |
| CN105018796B (en) * | 2014-05-02 | 2019-06-25 | 现代自动车株式会社 | High resiliency aluminium alloy and its manufacturing method |
| CN106591617A (en) * | 2016-12-22 | 2017-04-26 | 哈尔滨东盛金属材料有限公司 | Manganese additive for aluminum alloy and preparation method of manganese additive |
| CN113106301A (en) * | 2021-03-15 | 2021-07-13 | 山东滨州华创金属有限公司 | Preparation process of aluminum-titanium-boron-carbon grain refiner and refiner prepared by same |
| CN113106301B (en) * | 2021-03-15 | 2022-03-22 | 山东滨州华创金属有限公司 | Preparation process of aluminum-titanium-boron-carbon grain refiner and refiner prepared by same |
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