CN1064088C - Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy - Google Patents
Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy Download PDFInfo
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- CN1064088C CN1064088C CN98119377A CN98119377A CN1064088C CN 1064088 C CN1064088 C CN 1064088C CN 98119377 A CN98119377 A CN 98119377A CN 98119377 A CN98119377 A CN 98119377A CN 1064088 C CN1064088 C CN 1064088C
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Abstract
The present invention relates to a method for preparing aluminium base intermediate alloy containing titanium and carbon. The intermediate alloy mainly comprises aluminum, titanium, carbon, covering agents and activating agents, wherein the covering agent is a mixed salt, and the activating agents are rare-earth elements and alkaline earth elements. The preparation technology of the intermediate alloy comprises the following steps: firstly, melting commercially pure aluminium to 750 to 850 DEG C in a furnace; adding the activating agents in the furnace and later adding titanate and graphite powder in proportion; adding the covering agents for reacting for 10 to 30 minutes; pouring into an ingot by deslagging. In this way, the intermediate alloy is obtained. The present invention has the advantages of simple preparation technology and low cost of raw materials and production, and is suitable for large-scale industrial production and application.
Description
The present invention relates to the preparation method of the aluminium base master alloy of a kind of titaniferous, carbon, belong to the metallic substance technical field.
The aluminium base master alloy of titaniferous, carbon has quite widely to be used.Early stage research is carried out it as conventional aluminium and aluminum grain refiner.
Realize micritization and and then reach highly malleablized, be important and general research topic in aluminium and aluminium alloy and other metallic substance.Research to grain refining at present mainly comprises two approach, i.e. physical method and chemical process.Specific form is just like rapid solidification, stirring and interpolation nucleating agent (grain-refining agent) and powder metallurgy etc., wherein the most effective practicality and economic method is to add nucleating agent.
For commercial-purity aluminium and aluminium alloy, the fining agent that generally uses is the master alloy of series such as AlTi, AlTiB at present, and wherein Al5Ti1B is one of best fining agent of generally acknowledging in the world at present.But, still have some inborn problems that are difficult to overcome.At first, AlTiB fining agent TiB in use
2Particle is assembled easily, is precipitated, and influences its decline performance greatly, damages the surface quality of stocking especially greatly and damages roll; In addition, the AlTiB fining agent can lose thinning effect to aluminium and the aluminium alloy that contains elements such as Zr, Cr.The AlTiC that the eighties develops is that fining agent is that the problems referred to above have found a new solution route.Yet owing to the reasons such as wettability difference of aluminium liquid and graphite, carbon is introduced in the aluminum titanium alloy very difficult.At present, the typical preparation technology of AlTiC master alloy fining agent is the English Patent that Banerji and Reif deliver in the mid-80, the patent No. is GB2171723A, name is called " containing the preparation of TiC alloy ", is promptly adding certain particle size (mean particle size is 20 microns) under the high temperature more than 1250 ℃ and also stir to reach more than 30 minutes fast at 0.5-1 hour carbon dust of 700-900 ℃ of oven dry in advance and make in the Al-Ti alloy melt.Its complex manufacturing, raw material and technology cost are very high, and the stability of producing is not high.Above-mentioned factor has greatly hindered the development of AlTiC series fining agent.At present, the production of AlTiC fining agent only only limits to laboratory scale in the world, is small-scale industrial production at the most, also seldom uses on a large scale in the aluminium industrial production.
In addition, at the end of the eighties, along with XD
TMEtc. the appearance of spontaneous synthesis technique, Al-TiC is the interest that the research of in-situ composite begins to cause people, causes the extensive attention of international material circle gradually after entering the nineties and becomes one of focus of material Application Areas.At present, the XD that develops by the U.S. Martin Mametta company end of the eighties
TMTechnology is still the main technology of preparing that Al-TiC is an in-situ composite.This content is seen U.S. Pat 4,808,372, name is called " original position that contains the matrix material of high-melting-point material is synthesized ", its principle is that Ti, C powder and matrix Al or the Al powdered alloy that will generate TiC mix, being higher than the matrix fusing point, being lower than under the single TiC synthesis temperature condition, make between Ti, the C to react, thereby in aluminum substrate, form TiC strengthening phase particle.In this preparation method, wild phase element powders and matrix powder prefabricated and mix make the raw materials cost of this method very high, complex process, control difficulty and have suitable danger, be difficult to carry out large-scale industrial production.In recent years, for avoiding XD
TMThe above-mentioned shortcoming of method, it is in-situ composite that domestic and international many investigators adopt conventional founding+remelting chilling technology to prepare Al-TiC.In its conventional founding, be raw material with aluminium ingot, titanium ingot or aluminum-titanium alloy ingot and Graphite Powder 99, melting method reference A.Banerji and W.Reif prepare the method for Al-Ti-C grain-refining agent.Therefore, this Al-TiC is that preparation method and the Al-Ti-C of in-situ composite is that the preparation method of fining agent is the same, has very big defective, is difficult to apply.
The objective of the invention is to propose the preparation method of the aluminium base master alloy of a kind of titaniferous, carbon, defective at existing the whole bag of tricks, a kind of preparation method who contains Ti, the aluminium base master alloy of C simple again brand-new the time has been proposed, adopting commercial-purity aluminium and fluotitanate (potassium fluotitanate or titanium sodium fluoride) is raw material, replace in original method the metallic aluminium, metal titanium or the Al-Ti alloy raw material that generally adopt, thereby dissolving and reaction take place in carbon dust can make full use of fluotitanate when decomposing liberated heat and active titanium atom; Add constituent element X activation melt simultaneously, improve the wettability in molten aluminium and the carbon granules, significantly promote the absorption of carbon.
A kind of titaniferous that the present invention proposes, the aluminium base master alloy of carbon, it consists of:
Component content (wt%)
Aluminium (Al) 85.45-96.70
Titanium (Ti) 1-10
Carbon (C) 0.1-3.5
Activator (X) 0.00-4
Activator wherein is any or several in cerium, lanthanum, calcium, strontium, the magnesium.
The preparation method of the aforesaid master alloy that the present invention proposes comprises following each step:
1. prepare raw material for standby by formula rate;
2. the fusing commercial-purity aluminium adds activator in proportion to 750-850 ℃ in resistance furnace or induction furnace;
3. after 1-3 minute, add fluotitanate and Graphite Powder 99 in proportion, and add insulating covering agent, keep reaction 10-30 minute;
4. slagging-off is cast into ingot, promptly obtains the product master alloy.
Above-mentioned activator comprises one or more in rare earth element (lanthanum (La), cerium (Ce) etc.) and the alkaline earth element (magnesium (Mg), calcium (Ca), strontium (Sr) etc.).The main effect of its () activates molten aluminium on the one hand, promotes the absorption of carbon; Also reduced simultaneously the TiC agglomeration of particles that generates; Also strengthen the interface compatibility of TiC particle and aluminum substrate in the master alloy on the other hand.
The method that the present invention prepares above-mentioned fining agent is: the component proportions by design requirements in advance is ready to commercial-purity aluminium, fluotitanate (potassium fluotitanate or titanium sodium fluoride), Graphite Powder 99 (granularity is below 50 microns), activator (rare earth element or alkaline earth element or their mixture) and mixing salt insulating covering agent raw material for standby such as (50wt% Repone K+50wt% sodium-chlor).
The fusing commercial-purity aluminium adds promoting agent (X) earlier to 750-850 ℃ in induction furnace or resistance furnace, adds fluotitanate and Graphite Powder 99 simultaneously after about 1-2 minute, and adds the mixing salt insulating covering agent.For resistance furnace, can utilize the carrying out of mechanical agitation accelerated reaction; For electromagnetic induction furnace, utilize himself function composite by electromagnetic stirring to stir and get final product.After about 10-30 minute, slagging-off is cast into ingot, is the product master alloy.The recovery rate of titanium and carbon is all more than 90% among the present invention.
Preparation method of the present invention, its technology is simple, and raw material and production cost are low, are suitable for large-scale commercial production and application.
Embodiment of the present invention are described in detail as follows: embodiment 1
The master alloy prescription:
Component content (wt%)
Aluminium (Al) 93.95
Titanium (Ti) 5.00
Carbon (C) 1.00
Preparation technology is:
1. prepare raw material for standby by formula rate;
2. fusing commercial-purity aluminium to 800 ℃ in resistance furnace or induction furnace;
3. add titanium sodium fluoride and Graphite Powder 99 simultaneously, and add the mixing salt insulating covering agent, keep about 15 minutes of reaction;
4. slagging-off is cast into ingot, promptly obtains master alloy.
Embodiment 2
The master alloy prescription:
Component content (wt%)
Aluminium (Al) 92.65
Titanium (Ti) 5.00
Carbon (C) 1.00
Cerium (Ce) 1.30
Preparation technology is:
1. prepare raw material for standby by formula rate;
2. fusing commercial-purity aluminium to 800 ℃ in resistance furnace or induction furnace adds activator:
3. add potassium fluotitanate and Graphite Powder 99 simultaneously after about 2 minutes, and add the mixing salt insulating covering agent, keep about 15 minutes of reaction;
4. slagging-off is cast into ingot, promptly obtains master alloy.
Embodiment 3
The prescription of master alloy:
Component content (wt%)
Aluminium (Al) 96.70
Titanium (Ti) 1.00
Carbon (C) 0.20
Lanthanum (La) 2.00
Preparation technology is:
1. prepare raw material for standby by formula rate;
2. fusing commercial-purity aluminium to 750 ℃ in resistance furnace or induction furnace adds activator;
3. add titanium sodium fluoride and Graphite Powder 99 simultaneously after about 2 minutes, and add the mixing salt insulating covering agent, keep about 10 minutes of reaction;
4. slagging-off is cast into ingot, promptly obtains master alloy.
Embodiment 4
The prescription of master alloy:
Component content (wt%)
Aluminium (Al) 96.18
Titanium (Ti) 3.00
Carbon (C) 0.50
Calcium (Ca) 0.30
Preparation technology is:
1. prepare raw material for standby by formula rate;
2. fusing commercial-purity aluminium to 850 ℃ in resistance furnace or induction furnace adds activator;
3. add potassium fluotitanate and Graphite Powder 99 simultaneously after about 2 minutes, and add the mixing salt insulating covering agent, keep about 30 minutes of reaction;
4. slagging-off is cast into ingot, promptly obtains master alloy.
Embodiment 5
The prescription of master alloy:
Component content (wt%)
Aluminium (Al) 87.85
Titanium (Ti) 8.00
Carbon (C) 0.10
Strontium (Sr) 4.00
Preparation technology is:
1. prepare raw material for standby by formula rate;
2. fusing commercial-purity aluminium to 730 ℃ in resistance furnace or induction furnace adds activator:
3. add potassium fluotitanate and Graphite Powder 99 simultaneously after about 2 minutes, and add the mixing salt insulating covering agent, keep about 20 minutes of reaction;
4. slagging-off is cast into ingot, promptly obtains master alloy.
Embodiment 6
The prescription of master alloy:
Component content (wt%)
Aluminium (Al) 85.45
Titanium (Ti) 10.00
Carbon (C) 3.50
Magnesium (Mg) 1.00
Preparation technology is:
1. prepare raw material for standby by formula rate;
2. fusing commercial-purity aluminium to 830 ℃ in resistance furnace or induction furnace adds activator;
3. add titanium sodium fluoride and Graphite Powder 99 simultaneously after about 2 minutes, and add the mixing salt insulating covering agent, keep about 15 minutes of reaction;
4. slagging-off is cast into ingot, promptly obtains master alloy.Embodiment 7
The prescription of master alloy:
Component content (wt%)
Aluminium (Al) 90.98
Titanium (Ti) 7.00
Carbon (C) 1.50
Magnesium+cerium (Mg+Ce) 0.50
Preparation technology is:
1. prepare raw material for standby by formula rate;
2. fusing commercial-purity aluminium to 780 ℃ in resistance furnace or induction furnace adds activator;
3. add potassium fluotitanate and Graphite Powder 99 simultaneously after about 2 minutes, and add the mixing salt insulating covering agent, keep about 25 minutes of reaction;
4. slagging-off is cast into ingot, promptly obtains master alloy.
Embodiment 8
The master alloy prescription:
Component content (wt%)
Aluminium (Al) 89.65
Titanium (Ti) 5.00
Carbon (C) 1.00
Calcium+strontium+lanthanum (Ca+Sr+La) 4.30
Preparation technology is:
1. prepare raw material for standby by formula rate;
2. fusing commercial-purity aluminium to 800 ℃ in resistance furnace or induction furnace adds activator;
3. add titanium sodium fluoride and Graphite Powder 99 simultaneously after about 2 minutes, and add the mixing salt insulating covering agent, keep about 15 minutes of reaction;
4. slagging-off is cast into ingot, promptly obtains master alloy.
Claims (2)
1, the aluminium base master alloy of a kind of titaniferous, carbon is characterized in that consisting of of this alloy:
Component content (wt%)
Aluminium (Al) 85.45-96.70
Titanium (Ti) 1-10
Carbon (C) 0.1-3.5
Activator (X) 0.00-4
Activator wherein is any or several in cerium, lanthanum, calcium, strontium, the magnesium.
2, a kind of method for preparing master alloy as claimed in claim 1 is characterized in that this method comprises following each step:
1. prepare raw material for standby by formula rate;
2. the fusing commercial-purity aluminium adds activator in proportion to 750-850 ℃ in resistance furnace or induction furnace;
3. after 1-3 minute, add fluotitanate and carbon dust in proportion, and add insulating covering agent, keep reaction 10-30 minute;
4. slagging-off is cast into ingot, promptly obtains the product master alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98119377A CN1064088C (en) | 1998-09-25 | 1998-09-25 | Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98119377A CN1064088C (en) | 1998-09-25 | 1998-09-25 | Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1215087A CN1215087A (en) | 1999-04-28 |
| CN1064088C true CN1064088C (en) | 2001-04-04 |
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| CN98119377A Expired - Fee Related CN1064088C (en) | 1998-09-25 | 1998-09-25 | Process for preparation of titanium- and carbon-contained aluminium-base intermediate alloy |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386455C (en) * | 2006-06-22 | 2008-05-07 | 曹大力 | Method for preparing aluminum-titanium-carbon intermediate alloy |
| CN103131879A (en) * | 2011-11-29 | 2013-06-05 | 贵州铝厂 | Aluminum alloy metamorphism processing method |
| CN104962788B (en) * | 2015-06-24 | 2016-11-02 | 黑龙江科技大学 | A kind of aluminium alloy fining agent and preparation method |
| CN105420563A (en) * | 2015-11-02 | 2016-03-23 | 苏州金仓合金新材料有限公司 | Novel magnesium-aluminum-titanium carbide-rare earth intermediate alloy and preparation method thereof |
| CN109468479A (en) * | 2018-12-21 | 2019-03-15 | 济南大学 | A kind of aluminium-tantalum-carbon intermediate alloy and its preparation method and application |
| CN115341115B (en) * | 2021-05-12 | 2023-06-02 | 中国科学院过程工程研究所 | Aluminum-titanium-carbon intermediate alloy refiner and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088996A (en) * | 1993-11-18 | 1994-07-06 | 沈阳工业大学 | A kind of novel master alloy fining agent |
| DE4327227A1 (en) * | 1993-08-13 | 1995-02-16 | Schaedlich Stubenrauch Juergen | Grain refining agent, its manufacture and use |
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1998
- 1998-09-25 CN CN98119377A patent/CN1064088C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4327227A1 (en) * | 1993-08-13 | 1995-02-16 | Schaedlich Stubenrauch Juergen | Grain refining agent, its manufacture and use |
| CN1088996A (en) * | 1993-11-18 | 1994-07-06 | 沈阳工业大学 | A kind of novel master alloy fining agent |
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| CN1215087A (en) | 1999-04-28 |
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