CN109778006A - A kind of aerospace grade titanium alloy high purification smelting technology - Google Patents
A kind of aerospace grade titanium alloy high purification smelting technology Download PDFInfo
- Publication number
- CN109778006A CN109778006A CN201910165636.4A CN201910165636A CN109778006A CN 109778006 A CN109778006 A CN 109778006A CN 201910165636 A CN201910165636 A CN 201910165636A CN 109778006 A CN109778006 A CN 109778006A
- Authority
- CN
- China
- Prior art keywords
- melting
- casting
- ingot casting
- alloy
- ingot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of melting ingot casting purifying process of aerospace grade titanium alloy, it is characterised in that it includes following step: melting, finished ingot examine the step of being put in storage three times for compounding, mixing and electrode pressing block, welding resistance electrode block, vacuum consumable electrode arc furnace melting once, vacuum shell furnace secondary smelting, vacuum consumable electrode arc furnace.The present invention passes through different smelting technology combinations three times, titanium alloy material is set to obtain sufficient alloying, it is effectively removed by casting process and is mingled with foreign matter, be conducive to molybdenum element being uniformly distributed in titanium alloy, effectively reduce the harmful elements contents such as oxygen, nitrogen, hydrogen, phosphorus, the sulphur in TB8 titanium alloy, effective impurity screening is purified, to obtain higher degree TB8 titan alloy casting ingot.TB8 titan alloy casting ingot keeps alloying component distribution more uniform by multiple melting, effectively prevent being segregated, be mingled with, is able to satisfy the demand of aerospace grade titanium alloy.
Description
Technical field
The invention belongs to field of material technology, are related to titanium material, and in particular to a kind of aerospace grade titanium alloy high-purity
The technique for changing melting.
Background technique
In recent years, application of the titanium alloy material in fields such as aerospace, petrochemical industry, shipbuildings gradually expands.One state
The titanium alloy material preparation of family is horizontal at the important embodiment of a national overall national strength.
In numerous titanium alloy materials, due to the limitation of traditional smelting technology, the performance indicator of titanium alloy is often difficult to reach
To higher level, acceptance rate is relatively low.Wherein the TB8 titanium alloy in titanium alloy belongs to novel metastable beta titanium alloy, name at
It is divided into Ti-15Mo-3Al-2.7Nb-0.25Si, is a kind of ideal Aircraft Structure Materials, quality directly influences titanium alloy
The comprehensive performance of material.Containing the molybdenum of 14%-16% in TB8 titanium alloy, the fusing point of molybdenum is 2622 DEG C, density 10.0g/cm3, far
Higher than 1668 DEG C of the fusing point and density 4.5g/cm of titanium sponge3, while TB8 titanium alloy aluminium content is lower.TB8 titanium alloy tradition system
Standby technique is to use vacuum consumable electrode arc furnace melting, using primary, secondary or melting three times, even if passing through multiple melting in this way,
But this smelting preparation process still has following disadvantage:
1, vacuum consumable electrode arc furnace is in fusion process, if any titanyl compound containing high-melting-point, nitride or other Gao Rong
Point particle, if the presence of these substances, it is possible to play the role of cracking source in the final product, so that product can not expire
Sufficient quality requirement.
2, the melting in vacuum consumable electrode arc furnace, the alloy element of addition, either metal alloys are still intermediate
On the one hand alloy, fusing point do not allow more than the fusing point of alloy, on the other hand do not allow 450 DEG C -500 lower than the fusing point of titanium yet
DEG C, otherwise, fusing will cause ingot casting uneven components too early.
3, the substance high to individual fusing points still cannot sufficiently melt, and further affect the impurity content in ingot casting.It is right
For TB8, the fusing point of molybdenum is 2622 DEG C.In crystallization, high-melting-point element fails sufficiently to melt each component, meeting in ingot casting
It causes to be unevenly distributed, generates segregation phenomena, therefore impurity element can not be filtered thoroughly completely.
Summary of the invention
The object of the present invention is to provide a kind of melting ingot casting High Purity techniques of aerospace grade titanium alloy, casting after purification
Refractory metal element is evenly distributed during alloy melting in ingot, and impurity content is few, can prepare mass and stablize
Aerospace grade titanium alloy.
Specific technical solution is:
A kind of melting ingot casting purifying process of aerospace grade titanium alloy, which is characterized in that include the following steps:
Step 1, pure titanium sponge, pure molybdenum powder, pure silicon powder, aluminium ingredient: are selected according to the quality of material percentage proportion of setting
Beans, titanium-niobium alloy and pure iron nail are raw material, form material before mixing；
Step 2, mixing is with electrode pressing block: material being uniformly mixed, is then placed in electrode pressing mold and is pressed into
Electrode block, electrode block compacting use 2000T stage pressure equipment, and pressing pressure is 17 ± 2MPA, keep electrode block compacting close；
Step 3, capacity of the electrode block compacting after close further according to vacuum consumable electrode arc furnace is welded into electricity by welding resistance electrode block
Pole block turns melting once；
Step 4, melting once: using vacuum consumable electrode arc furnace melting, and smelting parameter is melting vacuum degree≤3Pa, melting
Electric current is slowly increased to 6000A, ingot casting of casting after raw material whole melting, 4 hours cooling, completes preliminary alloying, primary to cast
Ingot is come out of the stove；
Step 5, secondary smelting: vacuum shell furnace melting is carried out again to an ingot casting, melting electric current keeps melting once electricity
1.5 times or more of stream, until melting electric current >=15000A, melting vacuum degree≤3Pa；Fusion process is by impurity substances and other
After grain object filtration, purification, it is cast into secondary ingot casting, is come out of the stove within cooling 4 hours；
Step 6, melting three times: secondary ingot casting is finally moved into vacuum consumable electrode arc furnace and carries out third time melting, melting ginseng
Number is melting vacuum degree≤3Pa, and melting electric current is slowly increased to 7500A, 4 hours cooling until raw material whole melting completion, three times
Ingot casting is come out of the stove；
Step 7, finished ingot examines storage: sample and uses X-ray check to ingot casting three times, in observation titan alloy casting ingot whether
There are molybdenum elements to be mingled with a little, if it has not, then illustrating that molybdenum aluminium alloy is sufficiently melted, molybdenum element is evenly distributed, titan alloy casting ingot
Examine storage.
Further improve is that the titanium alloy quality of material that the step 1 is set matches are as follows: selects the pure of granularity appropriateness
Titanium sponge 76.2kg, pure molybdenum powder 15.3kg, titanium-niobium alloy 5.29kg, aluminium shot 3.15kg, pure silicon powder 0.19kg and pure iron nail
0.07kg, wherein the titanium in titanium-niobium alloy and niobium alloy ratio are 1: 1.
It further improves and is, the step 2, before the ingredient in step 1 is carried out to be uniformly mixed in batch mixer,
First guarantee that pure molybdenum powder and pure titanium sponge are sufficiently mixed uniformly before upper batch mixer, mixing time 5 minutes.
The aerospace grade titanium maxter alloy of present invention process preparation, advantageous effects are:
1, by selecting the raw material of high-purity, to reduce the impurity contents such as iron, silicon, carbon, and multiple vacuum is used
Molten alloy reduces the harmful elements contents such as oxygen, nitrogen, hydrogen, phosphorus, the sulphur in TB8 titanium alloy, to obtain higher degree TB8
Titanium alloy meets the needs of aerospace grade titanium alloy.
2, secondary smelting uses vacuum shell furnace melting, and effective impurity screening substance makes titanium alloy component point by melting
Cloth is uniform and obtains better structural constituent uniformity, effectively prevent being segregated, be mingled with.
3. using vacuum shell furnace melting, titanium alloy material can be made sufficiently to be melted, then effectively be gone by casting process
Except foreign matter is mingled with, be conducive to molybdenum element being uniformly distributed in titanium alloy.
Detailed description of the invention
Fig. 1 is the horizontal schematic diagram that finished product ingot casting of the invention inspects sample survey by random samples.
Fig. 2 is longitudinal schematic diagram that finished product ingot casting of the invention inspects sample survey by random samples.
In figure, H1~H 5 and Z1~Z5 are respectively finished product ingot casting cross and longitudinal check sample point.
Specific embodiment
The present invention is described in more detail With reference to embodiment.
Set titanium alloy mass percent after purification: matrix Ti, alloying element ingredient be 15.3Mo, 3.15Al,
2.75Nb、0.19Si、0.07Fe。
By taking TB8 titanium alloy as an example, finished ingot is designed as 100kg, and processing compound is as follows:
Specific implementation includes the following steps:
Step 1, ingredient: pure titanium sponge, pure molybdenum powder, titanium-niobium alloy, the aluminium shot, pure silicon of granularity appropriateness are chosen on the market
Powder, pure iron nail carry out quality proportioning, i.e., (titanium and niobium close by pure titanium sponge 76.2kg, pure molybdenum powder 15.3kg, titanium-niobium alloy 5.29kg
Golden ratio be 1: 1), aluminium shot 3.15kg, pure silicon powder 0.19kg, pure iron follow closely 0.07kg；
Step 2, mixing is with electrode pressing: the ingredient in step 1 is uniformly mixed in batch mixer, upper batch mixer it
It is preceding first to guarantee that molybdenum powder is uniformly mixed with titanium sponge, mixing 5 minutes, form pressing mixt material；
Mixed material is transported in electrode pressing mold, carries out electrode block compacting, electrode block compacting is using 2000T grades of pressures
Power equipment, pressing pressure are to make electrode block compacting close under 15M Pa~19M Pa, according to vacuum melting furnace apparatus capacity or order
It is 20kg that goods batch size, which suppresses every piece of electrode block weight,；
Step 3, welding resistance electrode: the electrode block welding resistance suppressed is formed into electrode block and waits melting once；
Step 4, melting once: the electrode block that step 3 is obtained carries out pill heat, uses vacuum consumable electric arc for the first time
Furnace melting makes the preliminary alloying of ingot casting by pill heat, sufficiently removes volatile materials and gas；
Smelting parameter are as follows: melting vacuum degree≤3Pa, melting electric current are slowly increased to 6000A or more, until electrode block is whole
Melting completion is cooled to 4 hours less, and one time ingot casting is come out of the stove；
Step 5, an ingot casting secondary smelting: is subjected to second of melting, melting vacuum degree using vacuum shell furnace melting
≤ 3Pa, melting electric current use 1.5 times or more of vacuum consumable electrode arc furnace, until keeping melting electric current 15000A or more；This is molten
Refining itself has melting casting process, impurity substances and other particulate matter filtration, purifications and purifying can be cast and be passed through after completing,
4 hours cooling, secondary ingot casting is come out of the stove；
Step 6, melting three times: third time melting uses vacuum consumable electrode arc furnace melting, smelting parameter are as follows: and vacuum degree≤
3Pa, melting electric current are slowly increased to 7500A or more, until secondary ingot casting whole melting is completed, after cooling 4 hours, and ingot casting three times
It comes out of the stove；
Step 7, finished ingot examines storage: X-ray check is sampled and used to ingot casting three times, TB8 titanium produced is observed and closes
It is mingled with a little in golden ingot casting with the presence or absence of molybdenum element, if it has not, then illustrating that molybdenum aluminium alloy is sufficiently melted, molybdenum element distribution is equal
Even, TB8 titan alloy casting ingot examines storage.
TB8 titan alloy casting ingot check analysis process is as follows:
H1~H 5 as shown in Figure 1 is finished product ingot casting horizontal check sample point.
Z1~Z5 as shown in Figure 2 is finished product ingot casting longitudinal check sample point.
TB8 titan alloy casting ingot it is horizontal and vertical it is each choose 5 sample points and carry out chemical composition analysis, with analyze ingot casting at
Divide uniformity, specific chemistry testing result is as follows, sees Tables 1 and 2.
1, TB8 titanium alloy is using Ti as matrix, other alloying elements are as follows: Mo:14%-16%, Al:2.5%-3.5%, Nb:
2.4%-3.2%, Si:0.15%-0.25%,
2, major impurity element in TB8 titanium alloy: Fe≤0.4%, C≤0.05%, N≤0.05%, H≤0.015%, 0
≤ 0.17%.
Using the TB8 titanium alloy casting of smelting technology development and production of the invention it can be seen from Tables 1 and 2 inspection data
Ingot transverse direction and longitudinal direction section chemical component test result meets GB/T 3620.1-2007 requirement, and distributed components, numerical value
Consistency is highly desirable, and ingredient fluctuation is very small, almost the same with alloy proportion value.
The present invention realizes the production of aerospace grade TB8 titanium alloy, and chemical component is uniform, molybdenum element without being mingled with a little,
And the impurity contents such as iron, carbon, oxygen, nitrogen, hydrogen are extremely low, can satisfy the demand of special titanium alloy material.
Table 1 (transverse direction)
Table 2 (longitudinal direction)
Claims (2)
1. a kind of melting ingot casting purifying process of aerospace grade titanium alloy, which is characterized in that include the following steps:
Step 1) ingredient: selects the pure titanium sponge of granularity appropriateness, pure molybdenum powder, pure according to the quality of material percentage proportion of setting
Silicon powder, aluminium shot, titanium-niobium alloy, pure iron nail, form material before mixing；
Step 2), mixing and electrode pressing block: pure titanium sponge and pure molybdenum powder are sufficiently mixed uniformly by material before upper batch mixer,
Material is mixed together uniformly again later, is placed in electrode pressing mold and is pressed into electrode block, electrode block compacting uses 2000T
Stage pressure equipment, pressing pressure are 17 ± 2MPA, keep electrode block compacting close；
Capacity of the electrode block compacting after close further according to vacuum consumable electrode arc furnace is welded into electrode by step 3), welding resistance electrode block
Block turns melting once；
Step 4), melting once: using vacuum consumable electrode arc furnace melting, and smelting parameter is melting vacuum degree≤3Pa, melting electric current
It is slowly increased to 6000A, after ingot casting of casting after material whole melting, 4 hours cooling, one time ingot casting is come out of the stove；
Step 5) secondary smelting: carries out vacuum shell furnace melting to an ingot casting, melting electric current maintains melting once electric current
1.5 times or more, until melting electric current >=15000A, melting vacuum degree≤3Pa is cast after complete melting after ingot casting, and cooling 4 is small
When, secondary ingot casting is come out of the stove；
Melting three times: secondary ingot casting is moved to vacuum consumable electrode arc furnace and carries out third time melting, smelting parameter is melting by step 6)
Vacuum degree≤3Pa, melting electric current are slowly increased to 7500A, and after casting ingot casting is completed in secondary ingot casting whole melting, cooling 4 is small
When, ingot casting is come out of the stove three times；
Whether step 7), finished ingot examine storage: X-ray check is sampled and used to ingot casting three times, observes and deposits in titan alloy casting ingot
It is mingled with a little in molybdenum element, if it has not, then illustrating that molybdenum aluminium alloy is sufficiently melted, molybdenum element is evenly distributed, titan alloy casting ingot inspection
Check-in library.
2. a kind of melting ingot casting purifying process of aerospace grade titanium alloy as described in claim 1, which is characterized in that described
The titanium alloy quality of material proportion that step 1 is set are as follows: pure titanium sponge 76.2kg, pure molybdenum powder 15.3kg, titanium-niobium alloy 5.29kg, aluminium
Beans 3.15kg, pure silicon powder 0.19kg and pure iron follow closely 0.07kg, and wherein the titanium in titanium-niobium alloy and niobium alloy ratio are 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910165636.4A CN109778006A (en) | 2019-02-24 | 2019-02-24 | A kind of aerospace grade titanium alloy high purification smelting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910165636.4A CN109778006A (en) | 2019-02-24 | 2019-02-24 | A kind of aerospace grade titanium alloy high purification smelting technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109778006A true CN109778006A (en) | 2019-05-21 |
Family
ID=66486139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910165636.4A Pending CN109778006A (en) | 2019-02-24 | 2019-02-24 | A kind of aerospace grade titanium alloy high purification smelting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109778006A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110527843A (en) * | 2019-09-25 | 2019-12-03 | 西北有色金属研究院 | A kind of preparation method of high niobium titanium alloy homogeneous ingot casting |
| CN112126819A (en) * | 2020-09-09 | 2020-12-25 | 宝鸡钛业股份有限公司 | Smelting method of titanium alloy material with high niobium content |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787465A (en) * | 2010-03-03 | 2010-07-28 | 洛阳双瑞精铸钛业有限公司 | Low density high casting property titanium alloy material and preparation method thereof |
| CN101948967A (en) * | 2010-09-30 | 2011-01-19 | 洛阳双瑞精铸钛业有限公司 | TiAl-based alloy material with excellent high-temperature property and preparation method thereof |
| CN102965541A (en) * | 2012-12-06 | 2013-03-13 | 中国船舶重工集团公司第十二研究所 | Ti80 titanium alloy standard substance and preparation method thereof |
| CN103555961A (en) * | 2013-11-07 | 2014-02-05 | 哈尔滨工业大学 | Smelting method for manufacturing large-sized titanium-aluminum alloy ingot |
| CN105525142A (en) * | 2016-01-26 | 2016-04-27 | 北京百慕航材高科技股份有限公司 | Low cost titanium alloy and homogenization preparation method thereof |
-
2019
- 2019-02-24 CN CN201910165636.4A patent/CN109778006A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787465A (en) * | 2010-03-03 | 2010-07-28 | 洛阳双瑞精铸钛业有限公司 | Low density high casting property titanium alloy material and preparation method thereof |
| CN101948967A (en) * | 2010-09-30 | 2011-01-19 | 洛阳双瑞精铸钛业有限公司 | TiAl-based alloy material with excellent high-temperature property and preparation method thereof |
| CN102965541A (en) * | 2012-12-06 | 2013-03-13 | 中国船舶重工集团公司第十二研究所 | Ti80 titanium alloy standard substance and preparation method thereof |
| CN103555961A (en) * | 2013-11-07 | 2014-02-05 | 哈尔滨工业大学 | Smelting method for manufacturing large-sized titanium-aluminum alloy ingot |
| CN105525142A (en) * | 2016-01-26 | 2016-04-27 | 北京百慕航材高科技股份有限公司 | Low cost titanium alloy and homogenization preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 周农等: "N b iT 50 超导合金熔铸新工艺的研究真空壳式炉熔铸对合金锭的效果", 《稀有金属合金加工》 * |
| 张利军等: "高钼含量 TB8 钛合金新型 VAR 熔炼工艺", 《特种铸造及有色合金》 * |
| 张金林等: "真空自耗凝壳炉直接熔配和铸造钛合金件的工艺研究", 《铸造》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110527843A (en) * | 2019-09-25 | 2019-12-03 | 西北有色金属研究院 | A kind of preparation method of high niobium titanium alloy homogeneous ingot casting |
| CN110527843B (en) * | 2019-09-25 | 2020-10-02 | 西北有色金属研究院 | Preparation method of high-niobium titanium alloy homogeneous ingot |
| CN112126819A (en) * | 2020-09-09 | 2020-12-25 | 宝鸡钛业股份有限公司 | Smelting method of titanium alloy material with high niobium content |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022041693A1 (en) | Tic strengthened cocrni medium-entropy alloy composite material and preparation method therefor | |
| CN102094136B (en) | Pure titanium wire for spectacle frame and manufacturing method thereof | |
| CN110079719B (en) | Method for increasing hafnium content in tantalum-tungsten alloy | |
| CN105925841B (en) | A kind of method for preparing the big alloy cast ingots of specification Ti 1023 | |
| CN108165866B (en) | Preparation method of multi-element high-entropy alloy | |
| CN109295330B (en) | Method for refining nitride inclusions in nickel-based wrought superalloy | |
| CN110340371A (en) | A kind of preparation method of granule intensified titanium-base compound material increasing material manufacturing powder | |
| LU500368B1 (en) | Preparation method for copper or copper alloy material, and refining agent for refining | |
| CN111118366B (en) | Vanadium-aluminum-iron intermediate alloy and preparation method thereof | |
| CN109609789A (en) | A kind of preparation method of the titan alloy casting ingot containing easy segregation element | |
| CN109778006A (en) | A kind of aerospace grade titanium alloy high purification smelting technology | |
| WO2013080390A1 (en) | α+β OR β TITANIUM ALLOY AND METHOD FOR PRODUCING SAME | |
| CN110625127A (en) | Preparation method of cobalt-chromium-nickel-tungsten alloy brazing filler metal powder | |
| CN110295301A (en) | A kind of preparation method of tungsten-titanium alloy | |
| CN101994048B (en) | Method for preparing multi-component niobium alloy ingot | |
| CN103898324A (en) | Preparation method of aluminum-tantalum alloy | |
| CN113278849B (en) | Reinforced and toughened metastable beta titanium alloy and preparation method thereof | |
| CN102453873B (en) | Titanium target and manufacturing method thereof | |
| CN104498770B (en) | A kind of WSTi2815SC Burn-Resistant Titanium Alloys and preparation method thereof | |
| CN116426806A (en) | Vanadium-chromium-molybdenum-aluminum alloy and preparation method thereof | |
| CN113322388B (en) | Preparation method of high-Mo titanium alloy ingot | |
| CN107304464B (en) | A kind of ternary alloy three-partalloy, preparation method and use improving titanium alloy component uniformity | |
| CN108330338B (en) | Aluminum-manganese-niobium three-element intermediate alloy and preparation method thereof | |
| CN113186414A (en) | Preparation process of aerospace grade TA15 special alloy | |
| CN117926018A (en) | Method for determining lower limit of primary smelting current of titanium alloy VAR |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190521 |
|
| WD01 | Invention patent application deemed withdrawn after publication |