CN104928540A - Al-Nb-Si-Ti intermediate alloy and preparation method thereof - Google Patents
Al-Nb-Si-Ti intermediate alloy and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an intermediate alloy for producing titanium alloy and a production method thereof, in particular to an Al-Nb-Si-Ti intermediate alloy and a preparation method thereof. The Al-Nb-Si-Ti intermediate alloy is characterized by comprising, by weight, 22.0% to 28.0% of niobium, 4.0% to 6.0% of silicon, 18.0% to 22.0% of titanium and the balance of aluminum. The preparation method is characterized in that metal thermo-reduction is used during the preparation process. The Al-Nb-Si-Ti intermediate alloy, a metallic compound mainly composed of niobium, silicon, titanium and aluminum, has the advantages that the brittleness is good, the breaking is easy, the production process of the titanium alloy is shortened, and the production process of the titanium alloy is easier to operate; oxide serves as raw material, the cost is low, the smelting process is stable and the forming state of the alloy is good; the alloy in the intermediate alloy form is added into sponge titanium and aluminum shot, and the segregation degree of the titanium alloy is reduced.
Description
Technical field
A kind of aluminium niobium silicon titanium master alloy and preparation method thereof, relates to a kind of master alloy standby for titanium alloys and preparation method thereof.
Background technology
Titanium alloy is widely used in war industry, aerospace industry and civilian industry, and master alloy is then the important raw and processed materials of producing titanium alloy.At present, titanium alloy master alloy adopts binary alloy, ternary alloy mostly, take metal simple-substance as the master alloy of raw material production, production process is complicated, cost is high, for reaching performance requriements during use, needs to add several binary alloy or ternary alloy, thus easily cause the instability of product performance, bring difficulty to production titanium alloy pilot process.
Summary of the invention
When the object of the invention is for technology Shortcomings, provide a kind of alloying constituent even, structure stability is good, has good toughness, plasticity and Hot Deformation Performance, aluminium niobium silicon titanium master alloy prepared by method simple to operate and preparation method thereof.
The object of the invention is to be achieved through the following technical solutions.
A kind of aluminium niobium silicon titanium master alloy, it is characterized in that the weight percent alloy composition of its alloy is: Nb:22.0% ~ 28.0%, Si:4.0% ~ 6.0%, Ti:18.0% ~ 22.0%, Al is surplus.
A kind of aluminium niobium silicon titanium master alloy of the present invention, it is characterized in that the weight percent alloy composition of its alloy is: Nb:24.5% ~ 25.5%, Si:4.5% ~ 5.5%, Ti:19.5% ~ 20.5%, Al is surplus.
The preparation method of a kind of aluminium niobium silicotitanium of the present invention, it is characterized in that its preparation process adopts metallothermics, take aluminium as reductive agent, Niobium Pentxoxide, silicon-dioxide, titanium dioxide are oxygenant, Potcrate is heat-generating agent, Calcium Fluoride (Fluorspan) is slag former, is smelted obtain the finished product by metallothermics.
The preparation method of a kind of aluminium niobium silicotitanium of the present invention, it is characterized in that the weight ratio of the aluminium powder of described employing metallothermics smelting process, Niobium Pentxoxide, silicon-dioxide, titanium dioxide, Potcrate is for (0.755 ~ 1.035): (0.330 ~ 0.425): (0.085 ~ 0.115): (0.330 ~ 0.355): (0.265 ~ 0.380), Calcium Fluoride (Fluorspan) add-on is 5% ~ 20% of batching gross weight.
The preparation method of a kind of aluminium niobium silicotitanium of the present invention, is characterized in that the raw material loading temperature of described employing metallothermics smelting process is 30 ~ 60 DEG C.
The preparation method of a kind of aluminium niobium silicotitanium of the present invention, it is characterized in that described reductive agent, oxygenant, heat-generating agent and slag former, after drying, then carry out metallothermic reduction, bake out temperature is 100 ~ 120 DEG C, and drying time is 10 ~ 12 hours.
The preparation method of a kind of aluminium niobium silicotitanium of the present invention, is characterized in that described reductive agent, oxygenant, heat-generating agent and slag former are powdery.
A kind of aluminium niobium silicotitanium of the present invention is quad alloy, as master alloy, the metallic compounds being main component with aluminium, niobium, silicon, titanium etc., enbrittles, breakable feature, shorten titanium alloy production process, make titanium alloy production process more easy to operate.Can use in the production process of titanium alloy with alloy packet form, when smelting titanium alloy with consumable electrode vacuum furnace, because spindle uniform composition then easily controls the size of electric current, facilitate the preparation of titanium alloy.The present invention is raw material with oxide compound, and cost is low, and smelting process is steady, and the state that alloy is formed is good; The degree of titanium alloy segregation can be effectively reduced in titanium alloy with the form melting of master alloy.
Embodiment
A kind of aluminium niobium silicon titanium master alloy, the weight percent alloy composition of its alloy is: Nb:22.0% ~ 28.0%, Si:4.0% ~ 6.0%, Ti:18.0% ~ 22.0%, and Al is surplus; The weight percent alloy composition of its good alloy is: Nb:24.5% ~ 25.5%, Si:4.5% ~ 5.5%, Ti:19.5% ~ 20.5%, and Al is surplus.
Its preparation process adopts metallothermics, and take aluminium as reductive agent, Niobium Pentxoxide, silicon-dioxide, titanium dioxide are oxygenant, and Potcrate is heat-generating agent, and Calcium Fluoride (Fluorspan) is slag former, is smelted obtain the finished product by metallothermics.
Concrete operation step comprises:
1, starting material being screened, by analyzing, composition of raw material being determined; Then starting material are dried, bake out temperature: 100 ~ 120 DEG C, drying time: 10 ~ 12 hours.
2, build stove to scale, calculate alloy proportion.
Table 1 embodiment 1 alloy formula table
3, loaded in mixer by raw material and carry out batch mixing, batch mixing requires: each starting material must fully mix, and ensures that the Contact of starting material is abundant.
4, last loading smelting, charging temperature is 30 ~ 60 DEG C.Within 24 hours, come out of the stove later, take out alloy pig, obtain product.Chemical analysis is carried out to taking-up alloying constituent, obtains following result.
Table 2 embodiment 1 alloying constituent table
Find out from above result, alloying constituent reaches necessary requirement, and stable components, foreign matter content is all lower.
Embodiment 2 ~ 5, by the operation of embodiment 1 method, difference from Example 1 sees the following form.
Table 3 aluminium niobium silicotitanium embodiment
Claims (7)
1. an aluminium niobium silicon titanium master alloy, it is characterized in that the weight percent alloy composition of its alloy is: Nb:22.0% ~ 28.0%, Si:4.0% ~ 6.0%, Ti:18.0% ~ 22.0%, Al is surplus.
2. a kind of aluminium niobium silicon titanium master alloy according to claim 1, it is characterized in that the weight percent alloy composition of its alloy is: Nb:24.5% ~ 25.5%, Si:4.5% ~ 5.5%, Ti:19.5% ~ 20.5%, Al is surplus.
3. the preparation method of a kind of aluminium niobium silicon titanium master alloy according to claim 1, it is characterized in that its preparation process adopts metallothermics, take aluminium as reductive agent, Niobium Pentxoxide, silicon-dioxide, titanium dioxide are oxygenant, Potcrate is heat-generating agent, Calcium Fluoride (Fluorspan) is slag former, is smelted obtain the finished product by metallothermics.
4. the preparation method of a kind of aluminium niobium silicon titanium master alloy according to claim 3, it is characterized in that the weight ratio of the aluminium powder of described employing metallothermics smelting process, Niobium Pentxoxide, silicon-dioxide, titanium dioxide, Potcrate is for (0.755 ~ 1.035): (0.330 ~ 0.425): (0.085 ~ 0.115): (0.330 ~ 0.355): (0.265 ~ 0.380), Calcium Fluoride (Fluorspan) add-on is 5% ~ 20% of batching gross weight.
5. the preparation method of a kind of aluminium niobium silicon titanium master alloy according to claim 3, is characterized in that the raw material loading temperature of described employing metallothermics smelting process is 30 ~ 60 DEG C.
6. the preparation method of a kind of aluminium niobium silicon titanium master alloy according to claim 3, it is characterized in that described reductive agent, oxygenant, heat-generating agent and slag former, after drying, then carry out metallothermic reduction, bake out temperature is 100 ~ 120 DEG C, and drying time is 10 ~ 12 hours.
7. the preparation method of a kind of aluminium niobium silicon titanium master alloy according to claim 3, is characterized in that described reductive agent, oxygenant, heat-generating agent and slag former are powdery.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109022931A (en) * | 2018-08-14 | 2018-12-18 | 南京云开合金有限公司 | A kind of aluminium niobium boron intermediate alloy, preparation method and its application |
| CN111378883A (en) * | 2020-04-21 | 2020-07-07 | 承德天大钒业有限责任公司 | Niobium-iron intermediate alloy and preparation method and application thereof |
| CN112301236A (en) * | 2020-10-27 | 2021-02-02 | 长沙矿冶研究院有限责任公司 | Method for producing high-grade niobium concentrate from niobium rough concentrate |
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Denomination of invention: An Al NB Si Ti master alloy and its preparation method Effective date of registration: 20220620 Granted publication date: 20170308 Pledgee: China Construction Bank Corporation Chengde high tech Zone sub branch Pledgor: CHENGDE TIANDA VANADIUM INDUSTRY Co.,Ltd. Registration number: Y2022130000037 |
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