CN108866365A - A kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method - Google Patents
A kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method Download PDFInfo
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- CN108866365A CN108866365A CN201810652026.2A CN201810652026A CN108866365A CN 108866365 A CN108866365 A CN 108866365A CN 201810652026 A CN201810652026 A CN 201810652026A CN 108866365 A CN108866365 A CN 108866365A
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- titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
Abstract
The present invention designs titanium-aluminium alloy field of powder metallurgy, provides a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method.By vacuum induction water jacketed copper crucible melting, vacuum consumable electrode melting, three kinds of techniques of vacuum consumable electrode skull melting combine, pass through the more uniform small size ingot casting of vacuum induction water jacketed copper crucible melting prepared composition first, then ingot casting homogeneity of ingredients and ingot diameters are improved by vacuum consumable electrode melting, the ingot casting of required size is prepared into finally by vacuum consumable electrode skull crucible, and further increase homogeneity of ingredients, give full play to three kinds of smelting technologies respectively advantage, sizes specification can be prepared with high efficiency, the uniform titanium aluminium ingot casting of ingredient, the processed electrode for going after desurfacing to can be used as preparation high-quality powder.The titanium-aluminium alloy electrode of the method preparation, ingredient accuracy is high, degree of purity is high, uniformity is good, and is suitble to large-scale production.
Description
Technical field：
The present invention provides a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation methods, belong to titanium aluminium powder field of metallurgy.
Background technique：
Ti-Al alloy material has excellent elevated temperature strength, creep resistance, inoxidizability and flame retardant property, reachable using temperature
600 DEG C ~ 1000 DEG C, and density is low, modulus is high, becomes aero-engine and the very attractive a new generation of rocket propulsion system waits
Select one of high-temperature structural material.Titanium-aluminium alloy is prepared using powder metallurgy process, the casting flaws such as loose, shrinkage cavity can be overcome,
And material composition is uniform, and microscopic structure is tiny, there is good mechanical property, and the near-net-shape of complex parts may be implemented,
The important research field of TiAl alloy poor as temperature-room type plasticity, processing difficulties.Pre-alloyed powder method formed titanium-aluminium alloy at
Divide good uniformity, oxygen and impurity content low, good mechanical performance, it has also become powder metallurgy prepares the main research side of titanium-aluminium alloy
To.
The effective technology for preparing titanium aluminium pre-alloyed powder has influence of plasma melting to orient aerosolization, electrode induction melting gas
Atomization, rotating disk method and plasma rotating electrode atomization method, wherein the aerosolization of electrode induction melting and plasma rotate aerosol
Change method, preparation process molten metal is not with foreign solid media contact, and the impurity content of powder of preparation is low, sphericity is high, mobility
It is good, it is chiefly used in preparing high quality titanium-aluminium alloy powder, but both techniques are required to electrode bar as raw material, therefore electric
The uniformity of pole ingredient has decisive role to powder quality, and electrode used at present generally directlys adopt vacuum induction water cooling
Crucible for smelting or the independent melting of vacuum consumable electrode smelting furnace, to the degree of purity of raw material, credit rating, intermediate alloy class
Not, material specification etc. require and limit more, prepared electrode composition uniformity it is poor, segregation seriously, electrode size specification list
One, preparation efficiency is low, is not suitable for large-scale production, therefore further develops high quality, low cost, is suitble to the titanium of large-scale production
Aluminum alloy anode preparation process becomes one of the emphasis direction for breaking through titanium-aluminium alloy power applications.
Currently used for titanium-aluminium alloy melting equipment there are mainly three types of, wherein vacuum induction water jacketed copper crucible smelting furnace former material
The different sizes raw material such as blocky, granular, powdery can be used in material, and it is uniform raising alloying component can be stirred by induction
Property, but it is constrained to domestic manufacturing capacity and foreign technology block, domestic equipment capacity is mostly in 20kg hereinafter, the scale of being not suitable for
Change prepares titanium-aluminium alloy electrode；Vacuum consumable electrode smelting furnace can prepare the titanium-aluminium alloy ingot casting of different size in batches, still
Used initial electrode needs to form the mechanical compactions such as titanium sponge, intermediate alloy, then carries out multiple consumable smelting, at
Divide uniformity poor；Vacuum consumable electrode skull crucible is generally used for the smelting and pouring of Ti-Al alloy cast, is not used in alloy cast ingot
Prepare again.
Summary of the invention：
Titanium-aluminium alloy technology for preparing electrode there are aiming at the problem that, this patent proposes a kind of high-quality titanium aluminium pre-alloyed powder and uses
Electrode preparation method, specific implementation step are as follows：
Step 1：According to target titanium-aluminium alloy component requirements, by titanium sponge and element needed for preparing titanium-aluminium alloy is with centre
Alloy or simple substance powder are uniformly mixed according to ratio, are put into the crucible of vacuum induction water jacketed copper crucible smelting furnace and are carried out melting,
Prepare ingot casting of titanium-aluminium alloy；
Step 2：An ingot casting prepared by step 1 is attached, the consutrode as step 2, using vacuum consumable electricity
Pole smelting furnace prepares the secondary ingot casting of titanium-aluminium alloy；
Step 3：Using secondary ingot casting prepared by step 2 as step 3 electrode, carried out using vacuum consumable electrode skull crucible
Melting again, and by pouring metal melt progressive die tool, obtain ingot casting three times.
Further, titanium sponge uses 0 grade or more titanium sponge in the step 1.
Further, the smelting furnace melting of vacuum induction water jacketed copper crucible starts vacuum degree≤2Pa, melting in the step 1
Process vacuum degree≤5Pa, alloy continue smelting time after melting completely and are not less than 3min,.
Further, it is carried out using welding in the step 2 or by an ingot casting prepared by step 1 by the way of being spirally connected
Connection.
Further, vacuum consumable electrode melting starts vacuum degree≤2Pa in the step 2, and fusion process vacuum degree≤
5Pa, secondary cast ingot dimension specification are 120 ~ 320mm of Φ.
Further, mold materials described in the step 3 are graphite or one of cast steel or cast iron.
Further, vacuum consumable electrode skull melting described in the step 3 starts vacuum degree≤2Pa, melting
Journey vacuum degree≤5Pa, cast ingot dimension specification are 30 ~ 120mm of Φ.
What technical solution of the present invention had has the beneficial effect that：The present invention by the melting of vacuum induction water jacketed copper crucible, vacuum from
Three kinds of power pole melting, vacuum consumable electrode skull melting techniques combine, and give full play to three kinds of smelting technologies respectively advantage, can be with
High efficiency prepares the uniform titanium aluminium ingot casting of sizes specification, ingredient, it is processed go desurfacing after can be used as preparation Gao Pin
The electrode of matter powder；The present invention is suitable for including γ-TiAl, Ti3Al alloy and Ti2A variety of titanium aluminium including AlNb alloy close
Gold,.
Specific embodiment：
To make the object, technical solutions and advantages of the present invention clearer, below by technical solution in the embodiment of the present invention
It is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
A kind of high-quality titanium aluminium pre-alloyed powder is included the following steps with electrode preparation method：
Step 1：Using vacuum induction water jacketed copper crucible melting, ingredient ingot casting of more uniform titanium-aluminium alloy is prepared.
Using gamma-TiAl alloy Ti-48Al-2Cr-2Nb as object, component requirements are（wt%）：Ti remaining, Al 32.6 ~
34.2, Cr 2.0 ~ 3.3, Nb 4.4 ~ 5.1, C≤0.02%, N≤0.02%, H≤0.01%, O≤0.08%, electrode target weight are
18kg weighs 0 grade of titanium sponge of raw material, Al beans, AlNb intermediate alloy, Cr powder simultaneously according to each element weight ratio by weight
It is uniformly mixed, is put into the crucible of 20kg grades of vacuum induction water jacketed copper crucible smelting furnaces, starts to vacuumize, vacuum degree reaches
Start melting, monitor system 500KW when 1Pa, fusion process vacuum degree keeps 4 ~ 5Pa, and alloy continues melting after melting completely
Time 5min, then power-off pours into an ingot casting of Φ 120mm.Step 1 technique repeatedly, 6 same specifications of preparation are once cast
Ingot.
Step 2：Using vacuum consumable electrode smelting furnace, the secondary ingot casting of titanium-aluminium alloy is prepared.
According to the target weight of the 100kg of secondary ingot casting, by step 1 prepare 6 ingot castings using by the way of welding into
Row connection, the consutrode as step 2 carry out 1 consumable smelting, vacuum using 150kg grades of vacuum consumable electrode smelting furnaces
Consumable electrode melting starts vacuum degree≤2Pa, 3 ~ 5Pa of fusion process vacuum degree, and prepared secondary cast ingot dimension specification is Φ
220mm。
Step 3：Using vacuum consumable electrode skull crucible, the titanium-aluminium alloy of size needed for smelting and pouring goes out ingot casting three times is right
Electrode needed for surface processing obtains.
Using the secondary ingot casting of Φ 220mm specification prepared by step 2 as step 3 electrode, using 100kg vacuum consumable
Electrode skull crucible carries out melting again, and melting starts vacuum degree≤2Pa, then fusion process 3 ~ 5Pa of vacuum degree pours molten metal
It infuses into graphite jig, mold is that the graphite jig that 4 internal diameters are Φ 55mm is composed, and obtains 4 ingot castings three times, cast ingot dimension
For Φ 55mm, processing peeling is carried out to surface, the final Ti-48Al-2Cr-2Nb titanium-aluminium alloy electrode for obtaining Φ 55mm.
Chemical component test, top result are carried out to electrode upper obtained, lower part（wt%）：Ti remaining, Al 33.0,
Cr 2.74, Nb 4.82, C≤0.018%, N≤0.012%, H≤0.0009%, O≤0.054%；Lower part result（wt%）：Ti its
It is remaining, Al 33.2, Cr 2.76, Nb 4.72, C≤0.008%, N≤0.010%, H≤0.0015%, O≤0.056%.
Claims (7)
1. a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method, which is characterized in that implement according to the following steps：
Step 1：According to target titanium-aluminium alloy component requirements, by titanium sponge and element needed for preparing titanium-aluminium alloy is with centre
Alloy or simple substance powder are uniformly mixed according to ratio, are put into the crucible of vacuum induction water jacketed copper crucible smelting furnace and are carried out melting,
Prepare ingot casting of titanium-aluminium alloy；
Step 2：An ingot casting prepared by step 1 is attached, the consutrode as step 2, using vacuum consumable electricity
Pole smelting furnace prepares the secondary ingot casting of titanium-aluminium alloy；
Step 3：Using secondary ingot casting prepared by step 2 as step 3 electrode, carried out using vacuum consumable electrode skull crucible
Melting again, and by pouring metal melt progressive die tool, obtain ingot casting three times.
2. such as a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method of claim 1, which is characterized in that the step 1
Middle titanium sponge uses 0 grade or more titanium sponge.
3. such as a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method of claim 1, which is characterized in that the step 1
Middle vacuum induction water jacketed copper crucible smelting furnace melting starts vacuum degree≤2Pa, fusion process vacuum degree≤5Pa, and alloy melts completely
Continue smelting time after change and is not less than 3min.
4. a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method as described in claim 1, which is characterized in that the step
It is attached in rapid two using welding or by the way of being spirally connected by an ingot casting prepared by step 1.
5. a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method as described in claim 1, which is characterized in that the step
Vacuum consumable electrode melting starts vacuum degree≤2Pa, fusion process vacuum degree≤5Pa in rapid two.
6. a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method as described in claim 1, which is characterized in that the step
Mold materials described in rapid three are graphite or one of cast steel or cast iron.
7. a kind of high-quality titanium aluminium pre-alloyed powder electrode preparation method as described in claim 1, which is characterized in that the step
Vacuum consumable electrode skull melting described in rapid three starts vacuum degree≤2Pa, fusion process vacuum degree≤5Pa.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113637858A (en) * | 2021-07-14 | 2021-11-12 | 上海大学 | TiAl-based alloy based on two-step composite smelting process and preparation method thereof |
| CN115747538A (en) * | 2022-11-25 | 2023-03-07 | 西安赛特思迈钛业有限公司 | Method for smelting large-size nickel-titanium alloy ingot with high uniformity and low gap |
| CN115896507A (en) * | 2022-11-23 | 2023-04-04 | 宁夏中色金航钛业有限公司 | Niobium hafnium titanium zirconium tantalum tungsten alloy and preparation process thereof |
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| JPS61223172A (en) * | 1985-03-29 | 1986-10-03 | Natl Res Inst For Metals | Manufacture of intermetallic compound tial base alloy |
| CN1718323A (en) * | 2005-08-05 | 2006-01-11 | 哈尔滨工业大学 | Casting method of large size hole defect less TiA1 base alloy ingot |
| CN104278167A (en) * | 2014-09-15 | 2015-01-14 | 安泰科技股份有限公司 | Manufacturing method of high-quality titanium-aluminum alloy target |
-
2018
- 2018-06-22 CN CN201810652026.2A patent/CN108866365A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61223172A (en) * | 1985-03-29 | 1986-10-03 | Natl Res Inst For Metals | Manufacture of intermetallic compound tial base alloy |
| CN1718323A (en) * | 2005-08-05 | 2006-01-11 | 哈尔滨工业大学 | Casting method of large size hole defect less TiA1 base alloy ingot |
| CN104278167A (en) * | 2014-09-15 | 2015-01-14 | 安泰科技股份有限公司 | Manufacturing method of high-quality titanium-aluminum alloy target |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113637858A (en) * | 2021-07-14 | 2021-11-12 | 上海大学 | TiAl-based alloy based on two-step composite smelting process and preparation method thereof |
| CN115896507A (en) * | 2022-11-23 | 2023-04-04 | 宁夏中色金航钛业有限公司 | Niobium hafnium titanium zirconium tantalum tungsten alloy and preparation process thereof |
| CN115896507B (en) * | 2022-11-23 | 2024-04-09 | 宁夏中色金航钛业有限公司 | Niobium hafnium titanium zirconium tantalum tungsten alloy and preparation process thereof |
| CN115747538A (en) * | 2022-11-25 | 2023-03-07 | 西安赛特思迈钛业有限公司 | Method for smelting large-size nickel-titanium alloy ingot with high uniformity and low gap |
| CN115747538B (en) * | 2022-11-25 | 2023-12-19 | 西安赛特思迈钛业有限公司 | High-uniformity low-clearance nickel-titanium alloy large-size ingot casting smelting method |
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Application publication date: 20181123 |