CN109722564A - Ti-6242 titanium alloy and preparation method thereof - Google Patents
Ti-6242 titanium alloy and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to titanium alloy technical fields, and in particular to Ti-6242 titanium alloy and preparation method thereof, the preparation method of the Ti-6242 titanium alloy, comprising the following steps: (1) block is suppressed；(2) block preliminary drying；(3) rifle is opened: starting first gun, the second electron gun and third electron gun；(4) melting: the electric current for adjusting every first gun is 3~6A, and the electric current of second electron gun is 3~6A, is completely melt block, obtains titanium melt, and refined to titanium melt with the second electron gun；(5) ingot will be crystallized and drawn through the obtained titanium melt that refines.Ti-6242 titanium alloy has been prepared using direct smelting method in the present invention, and the Ti-6242 titanium alloy for reducing production cost, and being prepared is stablized with internal component, and impurity content is low, meets the requirement of national standard GB/T 5193-2007.
Description
Technical field
The present invention relates to titanium alloy technical fields, and in particular to Ti-6242 titanium alloy and preparation method thereof.
Background technique
The nominal composition of Ti-6242 titanium alloy is Ti-6Al-2Sn-4Zr-2Mo-0.1Si, corresponding China's titanium alloy designations
TA19, it has high-intensitive, high tenacity and good creep-resistant property, and prevailing operating temperatures are 470 DEG C~550 DEG C, for making
Make fan disk, compressor disc, blade, the casing of aero-engine.
Traditional titanium alloy smelting method is that melting is carried out by vacuum consumable electrode arc furnace (VAR), the melting electricity of titanium alloy
Flow small, molten bath is shallow, and the retention time of melt is short, to be difficult to the high and low density inclusions in time ingot casting, influences ingot casting ingredient
Uniformity, cause the stable and consistent of product poor；Further, since vacuum consumable electrode arc furnace is in the polynary complex alloys side of melting
The intrinsic disadvantage in face is difficult to prepare complete pure, uniform high-quality ingot casting, thus in order to improve the final performance of alloy and
Flaw detection is horizontal, also complex on the subsequent machining technology of titan alloy casting ingot, needs to carry out 2~4 meltings, process control phase
To stringent, to weaken and adjust the deficiency of starting ingot melting to greatest extent, even if in this way, the aviation multiple groups produced at present
First titanium alloy large-scale workpiece still remains the problem of stability and dispersion degree difference.And the presence being mingled in titan alloy casting ingot
And the performances such as tired, lasting that unevenly will seriously damage aircraft engine mechanism member of ingredient.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of Ti-6242 titanium alloys and preparation method thereof, lead to
Crossing the Ti-6242 titanium alloy that the preparation method is prepared has Elemental redistribution uniform, and impurity content is low, product stable and consistent
Good advantage.
In order to solve the above technical problems, first aspect present invention provides a kind of preparation method of Ti-6242 titanium alloy, including
Metalliferous material is added in electron-beam cold bed furnace and carries out melting, the electron-beam cold bed furnace includes fusion zone, fining cell and crystallization
4 first guns are arranged in area, the fusion zone, and 1 the second electron gun is arranged in fining cell, and 2 third electronics are arranged in crystal region
Rifle, comprising the following steps:
(1) metalliferous material containing titanium, aluminium, tin, molybdenum, silicon and zirconium is pressed into block；
(2) block is carried out to preliminary drying in electron-beam cold bed furnace；
(3) open rifle: starting first gun, the second electron gun and third electron gun control every first gun
Electric current be not more than 2A, the electric current of second electron gun is not more than 2A；
(4) melting: the electric current for adjusting every first gun is 3~6A, the electric current of second electron gun is 3~
6A is completely melt block, obtains titanium melt, and refined to titanium melt with the second electron gun, wherein melt since block
Changing to the time being completely melt is 25~50min；
(5) ingot will be crystallized and drawn through the obtained titanium melt that refines.
Second aspect of the present invention provides a kind of Ti-6242 titanium alloy being prepared according to above-mentioned preparation method.
Through the above technical solutions, the present invention obtains following technical effect:
(1) in preparation method provided by the invention, high performance Ti-6242 titanium is prepared using a step fusion method and is closed
Gold, simple process reduce production cost；
(2) the Ti-6242 titanium alloy that the present invention is prepared has inner element stable content, and impurity content is low, row
The problem of being mingled in addition to high/low density meet the requirement of national standard GB/T 5193-2007.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the electron-beam cold bed furnace used in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the electron gun of the electron-beam cold bed furnace used in the embodiment of the present invention；
Fig. 3 is the irradiation position schematic diagram of the electron gun of the electron-beam cold bed furnace used in the embodiment of the present invention；
Fig. 4 is the location drawing of ingot casting sample point in test case of the present invention.
Description of symbols
1 crystallizer, 2 cold bed
3 feeder, 4 block
5 baffle, 6 electron gun
7 first detector, 8 second detector
9 ingot casting, 10 fusion zone
20 fining cell, 30 crystal region
601 first gun, 602 second electron gun
603 third electron guns
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
First aspect present invention provides a kind of preparation method of Ti-6242 titanium alloy, including electronics is added in metalliferous material
Melting is carried out in beam cold hearth, the electron-beam cold bed furnace includes fusion zone, fining cell and crystal region, the fusion zone setting 4
1 the second electron gun is arranged in a first gun, fining cell, and 2 third electron guns are arranged in crystal region；The following steps are included:
(1) metalliferous material containing titanium, aluminium, tin, molybdenum, silicon and zirconium is pressed into block；
(2) block is carried out to preliminary drying in electron-beam cold bed furnace；
(3) open rifle: starting first gun, the second electron gun and third electron gun control every first gun
Electric current be not more than 2A, the electric current of second electron gun is not more than 2A；
(4) melting: the electric current for adjusting every first gun is 3~6A, the electric current of second electron gun is 3~
6A is completely melt block, obtains titanium melt, and refined to titanium melt with the second electron gun, wherein melt since block
Changing to the time being completely melt is 25~50min；
(5) ingot will be crystallized and drawn through the obtained titanium melt that refines.
(Fig. 1 is the structural schematic diagram for the electron-beam cold bed furnace that the present invention uses as shown in Figure 1 to Figure 3；Fig. 2 is the present invention
The structural schematic diagram of the electron gun of electron-beam cold bed furnace used in the examples；Fig. 3 is the electricity used in the embodiment of the present invention
The irradiation position schematic diagram of the electron gun of beamlet cold hearth)；The course of work of electronics cold hearth in the present invention are as follows: first by block
Material 4 is placed in feeder 3, and block 4 is pushed to fusion zone 10 by the pusher on feeder 3, at this point, four first guns
601 irradiation materials 4, make the fusing of material 4 generate titanium melt, and the first monitor 7 is monitored fusion process, then titanium melt from
Fusion zone 10 flows into cold bed 2, flows into the titanium melt of cold bed 2 by the control of baffle 5 being arranged between fusion zone 10 and cold bed 2
Liquid level, the titanium melt in cold bed are refined under the irradiation of the second electron gun 602, and the titanium melt after refining is by cold bed 2
It flows into crystallizer 1, and is crystallized under the irradiation of third electron gun 603, the titanium melt after crystallization is drawn in ingot casting 9
Ingot detects the liquid level of crystallizer by the second monitor 8.
Due to containing various metals component (Ti, Al, Sn, Mo, Si and Zr) in Ti-6242 titanium alloy, these components are satisfied
There are biggish differences with vapour pressure, and in the fusion process of Ti-6242 titanium alloy, Al element and Sn element are waved there are biggish
Fever damage, and the volatilization loss rate of Zr element, Mo element, Si element is smaller, therefore in fusion process, is difficult accurately to control each
The content of element.The present invention makes each member in smelted product Ti-6242 titanium alloy by the content of each element in adjusting metalliferous material
The content of element meets the requirement of national standard, under optimum condition, on the basis of the total weight of the metalliferous material, and the metalliferous material packet
It includes: 82.7~85wt% of titanium sponge, 4.4~4.9wt% of AlSn50 intermediate alloy, AlMo40Si10 intermediate alloy 0.5~
2~2.4wt% of 0.9wt%, AlMo70 intermediate alloy, AlZr50 intermediate alloy 7.2~7.8wt% and Al beans 0.9~
1.3wt%；It is furthermore preferred that the metalliferous material includes: titanium sponge on the basis of the total weight of the metalliferous material
83.7wt%, AlSn50 intermediate alloy 4.6wt%, AlMo40Si10 intermediate alloy 0.78wt%, AlMo70 intermediate alloy
2.22wt%, AlZr50 intermediate alloy 7.55wt% and Al beans 1.15wt%.
Graininess or clastic metalliferous material are mixed first in the present invention, are then pressed into block, it is preferred that described
The partial size of titanium sponge is 0.83~12.7mm；The partial size of the AlMo40Si10 is 2~5mm；The partial size of the AlMo70 be 2~
5mm；The partial size of the AlZr50 is 2~5mm；The Al beans are Al99.6, and the partial size of the Al99.6 is 3~5mm.
It is further preferred that the content of Al element is that 7.37~8.61wt% (such as can be in the block
7.37wt%, 7.46wt%, 7.63wt%, 7.86wt%, 7.95wt%, 8.08wt%, 8.12wt%, 8.25wt%,
Range between 8.35wt%, 8.48wt%, 8.61wt% and the above numerical value), more preferably 8.08wt%；Sn in the block
The content of element be 2.24~2.5wt% (such as can be 2.24wt%, 2.28wt%, 2.35wt%, 2.38wt%,
Range between 2.47wt%, 2.5wt% and the above numerical value), more preferably 2.35wt%；The content of Zr element in the block
It (such as can be 3.66wt%, 3.78wt%, 3.84wt%, 3.92wt%, 3.97wt% or more for 3.66~3.97wt%
Range between numerical value), more preferably 3.84wt%；In the block content of Mo element be 1.62~2.07wt% (such as
It can model between 1.62wt%, 1.77wt%, 1.81wt%, 1.9wt%, 1.95wt%, 2.07wt% and the above numerical value
Enclose), more preferably 1.9wt%；The content of Si element is that 0.059~0.1wt% (such as can be in the block
Range between 0.059wt%, 0.068wt%, 0.08wt%, 0.09wt%, 0.1wt% and the above numerical value), more preferably
0.09wt%.
The size of block is to influence one of block burn-off rate and the factor of metallic element volatility, in order to control Al element
With the volatility of Sn element.Under optimum condition, the weight of the block is 10~25kg, preferably 20kg, the length of the block
Degree is 200~210mm, with a thickness of 170~200mm.
The present invention does not have special requirement to the feeding manner of block, can feed for unilateral charging or bilateral,
In a preferred embodiment of the invention, the block is that bilateral is fed, under optimum condition, the charging speed of the block
Degree is 13~16mm.
Preferably, in step (2), the time of the preliminary drying is 2~5h, and the temperature of preliminary drying is 100~130 DEG C；It is described
Vacuum degree in electron-beam cold bed furnace is 9.4 × 10-3~1.1 × 10-2torr。
One of an important factor for vacuum degree in electron-beam cold bed furnace is influence aluminium element and the volatilization of tin element scaling loss, vacuum
Spend higher, the scaling loss volatile quantity of aluminium element and tin element is lower, aluminium element and tin element in made Ti-6242 titanium alloy
Content is more stable；Furthermore vacuum degree is higher, the content of impurity in electron-beam cold bed furnace (oxygen, nitrogen, iron etc.) is also reduced, to drop
The content of impurity, improves the content of metallic element in Ti-6242 titanium alloy in low made Ti-6242 titanium alloy, from
And be conducive to improve the high temperature resistance of Ti-6242 titanium alloy.
Preferably, in step (3), the vacuum degree in the electron-beam cold bed furnace is 8 × 10-3~1.1 × 10-2torr。
Due to it is excessively high open rifle electric current (being higher than 2A) when, will lead to block and start to melt opening the rifle stage, so as to cause block
Material is chronically at liquid and aluminium element and tin element is caused excessively to volatilize, and influences the stabilization of constituent content in Ti-6242 titanium alloy
Property, it is preferred that (the rifle stage is opened) in step (3), and the electric current of each first gun (such as can be no more than 2A
Range between 0.2A, 0.5A, 0.8A, 1A, 1.3A, 1.5A, 1.8A or 2A and the above numerical value), the electricity of second electron gun
Stream (such as can model between 0.2A, 0.5A, 0.8A, 1A, 1.3A, 1.5A, 1.8A or 2A and the above numerical value no more than 2A
It encloses)；It is further preferred that the electric current of each first gun is 0.2~1.3A；The electric current of second electron gun is 1
~1.5A.
Fusing time is that metal block starts to be melted to the time being completely melt.
In order to reduce the excessive volatilization of aluminium element and tin element, in melt stage, one aspect of the present invention is by improving electronics
Vacuum degree in beam cold hearth reduces the scaling loss volatilization of aluminium element and tin element, it is preferred that (the i.e. melting rank in step (4)
Section), the vacuum degree in the electron-beam cold bed furnace is 5.2 × 10-3~1.1 × 10-2torr；On the other hand by improving electronics
The electric current of rifle avoids the excess of aluminium element and tin element caused by liquid overlong time from waving to reduce block fusing time
Hair；When too long between upon melting, the time that aluminium element and tin element are in liquid also accordingly increases, so as to cause aluminium element and tin
The scaling loss of element, which is volatilized, to be increased, so that the uniformity of Ti-6242 titanium alloy inner element distribution is influenced, it is described under optimum condition
Fusing time is 25~50min, more preferably 30~40min.
In melt stage, one aspect of the present invention reduces aluminium element and tin member by the vacuum degree improved in electron-beam cold bed furnace
The scaling loss volatilization of element, it is preferred that in step (4) (i.e. melt stage), vacuum degree in the electron-beam cold bed furnace is 5.2 ×
10-3~1.1 × 10-2torr；On the other hand liquid is avoided to reduce block fusing time by improving the electric current of electron gun
Aluminium element and the excessive of tin element are volatilized caused by overlong time, under optimum condition, in step (4) (i.e. melt stage),
The electric current of each first gun be 3~6A (such as can be 3A, 3.4A, 3.6A, 3.9A, 4.2A, 4.5A, 4.8A or 5A and
Range between the above numerical value), further preferably 3~5A；Titanium melt after melting flows into cold bed 2 second from fusion zone 10
Refined under the irradiation of electron gun, under optimum condition, the electric current of second electron gun be 3~6A (such as can be 3A,
Range between 3.4A, 3.6A, 3.9A, 4.2A, 4.5A, 4.8A or 5A and the above numerical value)；Further preferably 3.4~5.1A.
Titanium melt after refining is flowed into crystallizer 1 by cold bed 2, and is crystallized under the irradiation of third electron gun 603,
Titanium melt after crystallization carries out drawing ingot in ingot casting 9, and the liquid level of crystallizer, under optimum condition, institute are detected by the second monitor
The electric current for stating third electron gun 603 is 6.8~7.2A；The speed for drawing ingot is 6.0~8.0mm/min.
The present invention also provides a kind of Ti-6242 titanium alloys that preparation method of the invention is prepared.
The present invention will be described in detail by way of examples below.
In following embodiment, titanium sponge is purchased from Chaoyang Jinda Titanium Industry Co., Ltd., product batch number JD1704-233-
A, partial size are 0.83~12.7mm；AlSn50 intermediate alloy (bits shape) is purchased from Zhong Shi new high-tech material limited liability company, production batch
Number be ZP1610-1；AlMo40Si10 intermediate alloy is purchased from Chengde Tianda Vanadium Industry Co., Ltd., and product batch number is
JAMS20170401, partial size are 2~5mm；AlMo70 intermediate alloy is purchased from Chengde Tianda Vanadium Industry Co., Ltd., product batch number
For M20170403, partial size is 2~5mm；AlZr50 intermediate alloy is purchased from Chengde Tianda Vanadium Industry Co., Ltd., product batch number
For JAZ20170401, partial size is 2~5mm；Al beans are purchased from Chengde Tianda Vanadium Industry Co., Ltd., and product batch number is
DA20170307, partial size are 3~5mm.
In following embodiment, electron-beam cold bed furnace is the electronics of the BMO-01 model of Qinghai cumulative Tai Ye limited liability company
Beam cold hearth melting furnace, operating voltage 30kV.
In following embodiment, the pressing process of the block are as follows:
(1) it is weighed and is packed in valve bag to intermediate alloy needed for every block block and aluminium shot using 5000g electronic balance；
(2) it is weighed using 100kg electronic scale to titanium sponge needed for every block block, electronic scale must use test mass block before using
Check measurement accuracy；
(3) weighed titanium sponge pours into V-type batch mixer, and intermediate alloy and aluminium shot are weighed again through 5000g electronic balance
Examine it is errorless after pour into V-type batch mixer；
(4) start mixing after confirmation feeding inlet and discharge port closing are errorless, batch mixer it is positive and negative each turn 1 minute, it is mixed through 2 minutes
It discharges after material, is left in confirmation batch mixer without raw material when discharging；
(5) raw material through mixing is manually added press die, briquet.
In following embodiment, 4 first guns are respectively labeled as 1# electron gun, 2# electron gun, 3# electron gun, 4# electronics
Rifle；Second electron gun is labeled as 5# electron gun, and 2 third electron guns are respectively labeled as 6# electron gun, 7# electron gun.
Since in the actual operation process, in the whole preparation process of Ti-6242 titanium alloy, electron-beam cold bed furnace is always
Vacuum pumping is being carried out, to prevent the vacuum degree in electron-beam cold bed furnace from reducing, and the electric current of electron gun is by the shadow of vacuum degree
Sound is also larger, therefore, in the whole preparation process of Ti-6242 titanium alloy, in the electric current and electron-beam cold bed furnace of electron gun
Vacuum degree is there are subtle fluctuation, rather than fixed value, and therefore, electric current and vacuum degree are all it at certain section in following embodiment
Interior average value.
Experimental example 1
A kind of preparation method of Ti-6242 titanium alloy, steps are as follows:
It (1) will be in titanium sponge, AlSn50 intermediate alloy, AlMo40Si10 intermediate alloy, AlMo70 intermediate alloy, AlZr50
Between alloy and Al beans be pressed into 6 weight and volume blocks all the same, the weight of each block is 20kg, with a thickness of 180mm,
Length is 200mm；
The consumption proportion and particle size parameters of above-mentioned each material are as shown in table 1, and the weight proportion of each metallic element is such as in block
Shown in table 2；
(2) by block in electron-beam cold bed furnace at 120 DEG C preliminary drying 3h, and adjust the vacuum degree in electron-beam cold bed furnace
It is adjusted to 1 × 10-2Torr, using helium mass spectrometer leak detector to furnace body leak detection confirmation without leak source, and furnace body leak rate should be lower than
3.3torr*L/s；
(3) open rifle: startup power supply cabinet, adjusting the vacuum degree in electron-beam cold bed furnace is 1 × 10-2Torr then starts
One electron gun (1# electron gun, 2# electron gun, 3# electron gun, 4# electron gun), the second electron gun and third electron gun, and 1# is electric
Sub- rifle~4# electron gun electric current is gradually promoted to 1A, and the electric current of 5# electron gun is gradually promoted to 1.2A；
(4) it melts and refines: when the vacuum degree in electron-beam cold bed furnace reaches 1.1 × 10-2Torr, by 1# electron gun~4#
The current boost of 5# electron gun to 4.2A is irradiated block using 1# electron gun~4# electron gun to 4A by the current boost of electron gun
Material, melts block, forms titanium melt, irradiates titanium melt using 5# electron gun, refines to titanium melt；
(5) titanium melt crystallizes: the titanium melt after refining enters in crystallizer 1, and in third electron gun (6# electron gun and 7#
Electron gun) irradiation under crystallized, the electric current of the 6# electron gun and 7# electron gun is respectively 7A；
(6) ingot is drawn, the titanium melt after crystallization carries out drawing ingot in ingot casting 9, and drawing the speed of ingot is 7.0mm/min；
(7) ingot casting leads to cooling 3h after argon gas, then deflates, goes out ingot, obtains Ti-6242 titanium alloy.
Table 1: the consumption proportion of metalliferous material in embodiment 1
Table 2: in embodiment 1 in block each metallic element weight proportion
| Al (wt%) | Sn (wt%) | Mo (wt%) | Zr (wt%) | Si (wt%) | Ti (wt%) | Impurity (wt%) |
| 8.08 | 2.35 | 3.84 | 1.90 | 0.09 | 83.7 | 0.04 |
Embodiment 2
According to the method for embodiment 1, unlike, the consumption proportion of the metalliferous material is as shown in table 3, each gold in block
The weight proportion for belonging to element is as shown in table 4.
Embodiment 3
According to the method for embodiment 1, unlike, the consumption proportion of the metalliferous material is as shown in table 3, each gold in block
The weight proportion for belonging to element is as shown in table 4.
Table 3: the consumption proportion of metalliferous material in embodiment 2 and embodiment 3
Table 4: in embodiment 2 and embodiment 3 in block each metallic element weight proportion
Embodiment 4
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 5 institute of table
Show.
Embodiment 5
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 5 institute of table
Show.
Embodiment 6
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 5 institute of table
Show.
Embodiment 7
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 5 institute of table
Show.
Table 5: the parameter of rifle stage and smelt stage is opened in Examples 1 to 7
Comparative example 1
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 6 institute of table
Show.
Comparative example 2
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 6 institute of table
Show.
Comparative example 3
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 6 institute of table
Show.
Comparative example 4
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 6 institute of table
Show.
Comparative example 5
According to the method for embodiment 1, unlike, the parameter of the parameter for opening the rifle stage and smelt stage such as 6 institute of table
Show.
Table 6: the parameter of rifle stage and smelt stage is opened in comparative example 1~5
Test case
Fig. 4 is the location drawing of ingot casting sample point in test case of the present invention, according to sampling location shown in Fig. 4 to embodiment 1
~7 and the preparation-obtained Ti-6242 titan alloy casting ingot of comparative example 1~5 carry out chemical composition analysis, specific sampling step is such as
Under:
1) take the high temperature resistant titanium alloy ingot casting that length is 1300mm, width is 400mm, with ingot casting along its length on away from head
At portion 50mm, at 350mm, at 650mm, at 950mm and at 1250mm, depth is that the intersection point at 100mm and at 300mm is sampling
Point；
2) bores milling bits sample 0.1g on sample point using slotting cutter, will milling bits sample and sulfuric acid (concentration 98.0wt%) according to
1:2 ratio mixing, after bits sample to be milled is completely dissolved, with the ICP-7300V inductive coupling plasma emission spectrum of PE company, the U.S.
Instrument analyze aluminium in Examples 1 to 7 and the preparation-obtained Ti-6242 titan alloy casting ingot of comparative example 1~5, tin, iron chemistry at
Point, experimental result is shown in Table 7~table 17.
3) ONH2000 oxygen nitrogen instrument is used to detect the O on above-mentioned sample point, N content.
Table 7: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in embodiment 1
From table 1 it follows that having according to the titanium alloy that the technological parameter progress melting in embodiment 1 obtains good
Elemental redistribution uniformity and stability, since the difference of embodiment 2 and embodiment 3 and embodiment 1 is only that in block that element contains
The difference of amount, and smelting parameter is completely the same, therefore, below to embodiment 2 and the obtained Ti-6242 titanium alloy of embodiment 3
Elemental redistribution uniformity repeat no more, only record Ti-6242 titanium alloy in each element average content, experimental result such as table 8
It is shown.
Table 8: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in embodiment 2~3
As can be seen from Table 8, the content of element is an important factor for influencing constituent content in smelted product in block.
Table 9: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in embodiment 4
As can be seen from Table 9, it is opening the rifle stage, the vacuum degree in electron-beam cold bed furnace is deteriorated, and leads to Ti- obtained
The distributing homogeneity of element is deteriorated in 6242 titanium alloys, and the content of impurity also becomes more.
Table 10: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in embodiment 5
| Number | A1 | B1 | C1 | D1 | E1 | Mean value | Standard deviation |
| Al% | 5.73 | 6.38 | 6.07 | 6.35 | 6.34 | 6.17 | 0.278 |
| Sn% | 1.81 | 1.85 | 1.83 | 1.94 | 2.03 | 1.89 | 0.091 |
| Zr% | 3.91 | 3.72 | 4.21 | 4.02 | 3.96 | 3.96 | 0.178 |
| Mo% | 1.99 | 1.98 | 2.05 | 1.86 | 2.06 | 1.98 | 0.079 |
| Si% | 0.043 | 0.042 | 0.046 | 0.042 | 0.04 | 0.042 | 0.002 |
| Fe% | 0.025 | 0.035 | 0.032 | 0.033 | 0.031 | 0.031 | 0.004 |
| O% | 0.122 | 0.114 | 0.13 | 0.125 | 0.116 | 0.121 | 0.006 |
| N% | 0.002 | 0.005 | 0.005 | 0.002 | 0.003 | 0.003 | 0.002 |
| Number | A2 | B2 | C2 | D2 | E2 | Mean value | Standard deviation |
| Al% | 6.35 | 6.27 | 6.36 | 5.69 | 6.29 | 6.19 | 0.283 |
| Sn% | 1.98 | 2.16 | 1.96 | 1.73 | 2.12 | 1.99 | 0.169 |
| Zr% | 3.66 | 3.83 | 3.62 | 3.63 | 3.74 | 3.69 | 0.088 |
| Mo% | 1.83 | 1.9 | 1.83 | 1.81 | 1.96 | 1.86 | 0.063 |
| Si% | 0.062 | 0.051 | 0.059 | 0.048 | 0.066 | 0.057 | 0.008 |
| Fe% | 0.026 | 0.031 | 0.034 | 0.032 | 0.032 | 0.031 | 0.003 |
| O% | 0.101 | 0.128 | 0.116 | 0.122 | 0.128 | 0.11675 | 0.012 |
| N% | 0.003 | 0.007 | 0.003 | 0.004 | 0.005 | 0.0044 | 0.008 |
As can be seen from Table 10, the vacuum degree in smelt stage, electron-beam cold bed furnace is deteriorated, and will lead to obtained
The distributing homogeneity of element is deteriorated in Ti-6242 titanium alloy, and the content of impurity also becomes more.
Table 11: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in embodiment 6
| Number | A1 | B1 | C1 | D1 | E1 | Mean value | Standard deviation |
| Al% | 5.56 | 5.51 | 5.86 | 5.57 | 5.53 | 5.606 | 0.144 |
| Sn% | 1.83 | 1.96 | 1.89 | 1.99 | 1.85 | 1.904 | 0.069 |
| Zr% | 3.96 | 4.21 | 4.1 | 3.71 | 3.99 | 3.994 | 0.187 |
| Mo% | 1.99 | 2.13 | 2.04 | 2.19 | 1.95 | 2.06 | 0.099 |
| Si% | 0.048 | 0.041 | 0.051 | 0.042 | 0.059 | 0.048 | 0.007 |
| Fe% | 0.036 | 0.025 | 0.028 | 0.032 | 0.035 | 0.031 | 0.005 |
| O% | 0.121 | 0.125 | 0.123 | 0.122 | 0.115 | 0.121 | 0.004 |
| N% | 0.0002 | 0.003 | 0.005 | 0.003 | 0.003 | 0.003 | 0.002 |
| Number | A2 | B2 | C2 | D2 | E2 | Mean value | Standard deviation |
| Al% | 6.02 | 5.53 | 5.89 | 5.92 | 6.01 | 5.874 | 0.200 |
| Sn% | 1.73 | 1.82 | 1.82 | 1.93 | 1.88 | 1.836 | 0.0750 |
| Zr% | 4.05 | 3.66 | 3.76 | 4.25 | 4.19 | 3.982 | 0.261 |
| Mo% | 1.99 | 2.11 | 1.93 | 2.01 | 2.18 | 2.044 | 0.099 |
| Si% | 0.044 | 0.044 | 0.046 | 0.042 | 0.04 | 0.043 | 0.002 |
| Fe% | 0.025 | 0.031 | 0.026 | 0.028 | 0.022 | 0.026 | 0.003 |
| O% | 0.112 | 0.121 | 0.128 | 0.131 | 0.125 | 0.123 | 0.007 |
| N% | 0.005 | 0.006 | 0.004 | 0.003 | 0.003 | 0.004 | 0.001 |
As can be seen from Table 11, it in smelt stage, when the electric current of first gun and the second electron gun becomes smaller, will lead to
Smelting time is elongated, and the distributing homogeneity for resulting in element in Ti-6242 titanium alloy is deteriorated, and the content of impurity also becomes more.
Table 12: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in embodiment 7
As can be seen from Table 12, in smelt stage, when the increase of the electric current of first gun and the second electron gun, same meeting
The distributing homogeneity of element in Ti-6242 titanium alloy obtained is caused to be deteriorated, and the content of impurity also becomes more.
Table 13: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in comparative example 1
Table 14: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in comparative example 2
| Number | A1 | B1 | C1 | D1 | E1 | Mean value | Standard deviation |
| Al% | 4.76 | 4.99 | 5.52 | 4.66 | 5.32 | 5.05 | 0.3652 |
| Sn% | 1.69 | 1.58 | 1.93 | 1.87 | 1.61 | 1.736 | 0.1565 |
| Zr% | 3.79 | 3.93 | 4.21 | 4.08 | 4.38 | 4.078 | 0.2310 |
| Mo% | 1.73 | 1.86 | 1.98 | 2.18 | 2.07 | 1.964 | 0.1759 |
| Si% | 0.057 | 0.061 | 0.069 | 0.072 | 0.059 | 0.0636 | 0.0065 |
| Fe% | 0.055 | 0.046 | 0.031 | 0.025 | 0.039 | 0.0392 | 0.0119 |
| O% | 0.12 | 0.13 | 0.15 | 0.15 | 0.13 | 0.136 | 0.0134 |
| N% | 0.005 | 0.006 | 0.004 | 0.008 | 0.009 | 0.0064 | 0.0021 |
| Number | A2 | B2 | C2 | D2 | E2 | Mean value | Standard deviation |
| Al% | 4.93 | 4.86 | 4.57 | 4.63 | 5.52 | 4.902 | 0.3771 |
| Sn% | 1.72 | 2.19 | 1.61 | 1.84 | 1.59 | 1.79 | 0.2448 |
| Zr% | 3.96 | 3.76 | 3.91 | 4.08 | 4.26 | 3.994 | 0.1878 |
| Mo% | 1.85 | 1.86 | 1.79 | 1.88 | 2.21 | 1.918 | 0.1666 |
| Si% | 0.058 | 0.063 | 0.077 | 0.051 | 0.069 | 0.0636 | 0.0100 |
| Fe% | 0.039 | 0.034 | 0.046 | 0.051 | 0.016 | 0.0372 | 0.0135 |
| O% | 0.15 | 0.11 | 0.15 | 0.11 | 0.18 | 0.14 | 0.0300 |
| N% | 0.007 | 0.004 | 0.007 | 0.005 | 0.008 | 0.0062 | 0.0016 |
Table 15: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in comparative example 3
Table 16: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in comparative example 4
Table 17: the chemical composition analysis table of Ti-6242 titan alloy casting ingot in comparative example 5
| Number | A1 | B1 | C1 | D1 | E1 | Mean value | Standard deviation |
| Al% | 4.34 | 4.56 | 4.39 | 5.29 | 4.67 | 4.65 | 0.3814 |
| Sn% | 1.75 | 1.83 | 1.93 | 1.86 | 1.83 | 1.84 | 0.0648 |
| Zr% | 4.16 | 4.08 | 3.88 | 3.69 | 4.21 | 4.004 | 0.2159 |
| Mo% | 2.23 | 2.51 | 2.31 | 1.86 | 2.07 | 2.196 | 0.2457 |
| Si% | 0.061 | 0.048 | 0.041 | 0.051 | 0.055 | 0.0512 | 0.0075 |
| Fe% | 0.052 | 0.039 | 0.054 | 0.048 | 0.061 | 0.0508 | 0.0081 |
| O% | 0.13 | 0.15 | 0.16 | 0.15 | 0.16 | 0.15 | 0.0122 |
| N% | 0.008 | 0.007 | 0.006 | 0.006 | 0.005 | 0.0064 | 0.0011 |
| Number | A2 | B2 | C2 | D2 | E2 | Mean value | Standard deviation |
| Al% | 4.24 | 4.31 | 4.49 | 4.67 | 4.83 | 4.508 | 0.2456 |
| Sn% | 1.93 | 1.88 | 1.74 | 1.91 | 1.95 | 1.882 | 0.0835 |
| Zr% | 4.08 | 3.98 | 4.21 | 4.26 | 3.71 | 4.048 | 0.2186 |
| Mo% | 2.03 | 2.11 | 1.89 | 1.94 | 2.23 | 2.04 | 0.1356 |
| Si% | 0.055 | 0.052 | 0.067 | 0.044 | 0.04 | 0.0516 | 0.0105 |
| Fe% | 0.055 | 0.041 | 0.056 | 0.057 | 0.042 | 0.0502 | 0.0080 |
| O% | 0.14 | 0.18 | 0.15 | 0.11 | 0.17 | 0.15 | 0.0274 |
| N% | 0.008 | 0.008 | 0.007 | 0.007 | 0.006 | 0.0072 | 0.0008 |
As can be seen that opening rifle stage and smelt stage from 7~table of table 17, the vacuum degree in electron-beam cold bed furnace is got over
The volatility of height, aluminium element and tin element is smaller, and the stability of element is better in high temperature resistant titanium alloy, and impurity content is also lower；
Rifle stage and smelt stage are being opened, electric current is excessively high, the stability of aluminium element and tin element element in high temperature resistant titanium alloy obtained
Poorer, impurity content is also higher.This may be to cause the volatilization of the scaling loss of aluminium element and tin element to increase because electric current increases, lead
Cause the bad stability of aluminium element and tin element in high temperature resistant titanium alloy.
Rifle stage and smelt stage are being opened, electric current is too low, and the stability of aluminium element and tin element becomes in high temperature resistant titanium alloy
Difference, impurity content are also higher.
2, Mechanics Performance Testing
The reference of titanium alloy room-temperature mechanical property testing standard " GBT 228.1-2010 metal material stretching test part 1:
Room temperature test method "；
Mechanics Performance Testing standard of titanium alloy at a temperature of 480 DEG C and 600 DEG C is referring to " GBT 4338-2006 metal material
Expect high temperature tension test method ".
It the results are shown in Table 18,19, wherein Rm is tensile strength；Rp0.2 is Proof strength of non-proportional；A is elongation of having no progeny
Rate；ψ is the contraction percentage of area.
Table 18: the mechanical property table of the Ti-6242 titanium alloy in Examples 1 to 7
Table 19: the mechanical property table of the Ti-6242 titanium alloy in comparative example 1~5
The titanium that can be seen that embodiment 1-7 prepared by method provided by the invention from the mechanical property result of table 18,19 closes
Golden ingot casting can have comprehensive mechanical property more better than titan alloy casting ingot made from comparative example, and the stability of mechanical property
It is excellent.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of preparation method of Ti-6242 titanium alloy, including metalliferous material is added in electron-beam cold bed furnace and carries out melting, institute
Stating electron-beam cold bed furnace includes fusion zone, fining cell and crystal region, and 4 first guns are arranged in the fusion zone, and fining cell is set
1 the second electron gun is set, 2 third electron guns are arranged in crystal region；Characterized by comprising the following steps:
(1) metalliferous material containing titanium, aluminium, tin, molybdenum, silicon and zirconium is pressed into block；
(2) block is carried out to preliminary drying in electron-beam cold bed furnace；
(3) open rifle: starting first gun, the second electron gun and third electron gun control the electricity of every first gun
Stream is not more than 2A, and the electric current of second electron gun is not more than 2A；
(4) melting: the electric current for adjusting every first gun is 3~6A, and the electric current of second electron gun is 3~6A,
It is completely melt block, obtains titanium melt, and refined to titanium melt with the second electron gun, wherein melt since block
It is 25~50min to the time being completely melt；
(5) ingot will be crystallized and drawn through the obtained titanium melt that refines.
2. preparation method according to claim 1, wherein on the basis of the total weight of the metalliferous material, the metal
Material includes: 82.7~85wt% of titanium sponge, 4.4~4.9wt% of AlSn50 intermediate alloy, AlMo40Si10 intermediate alloy 0.5
2~2.4wt% of~0.9wt%, AlMo70 intermediate alloy, AlZr50 intermediate alloy 7.2~7.8wt% and Al beans 0.9~
1.3wt%；
Preferably, the weight of the block is 10~25kg, with a thickness of 170~200mm.
3. preparation method according to claim 2, wherein in the block content of Al element be 7.37~
8.61wt%；And/or
The content of Sn element is 2.24~2.5wt% in the block；And/or
The content of Zr element is 3.66~3.97wt% in the block；And/or
The content of Mo element is 1.62~2.07wt% in the block；And/or
The content of Si element is 0.059~0.1wt% in the block.
4. preparation method according to claim 2, wherein the partial size of the titanium sponge is 0.83~12.7mm；And/or
The partial size of the AlMo40Si10 is 2~5mm；And/or
The partial size of the AlMo70 is 2~5mm；And/or
The partial size of the AlZr50 is 2~5mm；And/or
The Al beans are Al99.6, and the partial size of the Al99.6 is 3~5mm.
5. preparation method according to claim 1, wherein in step (2), the time of the preliminary drying is 2~5h, preliminary drying
Temperature be 100~130 DEG C；
Vacuum degree in the electron-beam cold bed furnace is 9.4 × 10-3~1.1 × 10-2torr。
6. preparation method according to claim 1 or 5, wherein true in the electron-beam cold bed furnace in step (3)
Reciprocal of duty cycle is 8 × 10-3~1.1 × 10-2torr。
7. preparation method according to claim 6, wherein in step (3), the electric current of each first gun is
0.2~1.3A；The electric current of second electron gun is 1~1.5A.
8. preparation method according to claim 1 or 5, wherein true in the electron-beam cold bed furnace in step (4)
Reciprocal of duty cycle is 5.2 × 10-3~1.1 × 10-2torr；
Preferably, the charging rate of the block is 13~16mm.
9. preparation method according to claim 1, wherein in step (5), the electric current of the third electron gun is 6.8
~7.2A；And/or
In step (5), the speed for drawing ingot is 6.0~8.0mm/min.
10. a kind of Ti-6242 titanium alloy, which is characterized in that preparation method described according to claim 1~any one of 9
It is prepared.
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