CN110004311A - It is a kind of for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe - Google Patents
It is a kind of for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe Download PDFInfo
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- CN110004311A CN110004311A CN201910221235.6A CN201910221235A CN110004311A CN 110004311 A CN110004311 A CN 110004311A CN 201910221235 A CN201910221235 A CN 201910221235A CN 110004311 A CN110004311 A CN 110004311A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 60
- 239000000956 alloy Substances 0.000 title claims abstract description 60
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000005266 casting Methods 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 40
- 230000008018 melting Effects 0.000 claims abstract description 40
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 18
- 239000004615 ingredient Substances 0.000 claims abstract description 15
- 239000004411 aluminium Substances 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000010936 titanium Substances 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000010894 electron beam technology Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 10
- PTXMVOUNAHFTFC-UHFFFAOYSA-N alumane;vanadium Chemical compound [AlH3].[V] PTXMVOUNAHFTFC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 10
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 7
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 7
- 238000007499 fusion processing Methods 0.000 claims description 5
- 230000003019 stabilising effect Effects 0.000 claims description 5
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000012856 weighed raw material Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 21
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 18
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract 1
- 238000005303 weighing Methods 0.000 abstract 1
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 35
- 238000007670 refining Methods 0.000 description 6
- 229910052719 titanium Inorganic materials 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 101100008047 Caenorhabditis elegans cut-3 gene Proteins 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention discloses a kind of for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe, belongs to titanium alloy smelting technical field.The method of the invention is using titanium sponge, aluminium vanadium intermediate alloy and aluminium shot as raw material, it carries out weighing ingredient according to element mass ratio Ti:Al:V=87 ~ 89%:7.5 ~ 8.5%:3.5 ~ 4.5%, then pass through vacuum consumable arc process realization raw alloy after carrying out the processes such as mixing, briquetting, drying, welding electrode, electron beam cold hearth melting method is recycled to prepare the TC4 titan alloy casting ingot that can be used for directly manufacturing seamless pipe.The high-quality TC4 titan alloy casting ingot that ingredient even tissue can not only be prepared using this method, be mingled with without high/low density, and the TC4 titanium alloy seamless pipe excellent in mechanical performance directly manufactured using the ingot casting, while being obviously shortened its manufacturing process flow, improve lumber recovery, significantly reduce production cost.
Description
Technical field
The present invention relates to a kind of for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe, belongs to titanium alloy
Melting technique field.
Background technique
TC4 (Ti-6Al-4V) alloy is a kind of alpha+beta biphase titanium alloy, is manufactured into titanium alloy seamless pipe, compared to biography
Unite steel pipe, stainless steel tube, copper alloy tube etc. has that density is small, specific strength is high, corrosion-resistant, high temperature resistant, the excellent synthesis such as solderable
Performance has wide practical use in numerous areas such as aerospace, ocean engineering, chemical industry, automobile, electric power and ships.At present
The conventional fabrication processes of TC4 titanium alloy seamless pipe are first to melt out alloy cast ingot using vacuum consumable electrode arc furnace, are carried out after forging and stamping
Drilling squeezes or roll piercing, then the finished product tubing of different size and purposes is prepared by the methods of rolling, drawing, spinning,
That there are process flows is long for it, lumber recovery is low, is difficult to the disadvantages of obtaining overlength tube, causes tubing cost high, using by
To very big limitation.
It is not necessarily to forging process using TC4 titan alloy casting ingot, process flow can be obviously shortened and mention by directly manufacturing seamless pipe
High yield significantly reduces production cost.But there are ingredients and group for the TC4 titan alloy casting ingot of traditional vacuum consumable arc process melting
It knits uneven, high/low density and is mingled with and be difficult to the disadvantages of removing, generally require 2 ~ 3 remeltings and forging process must be carried out to solve
Above-mentioned problem cannot achieve ingot casting and directly manufacture titanium alloy seamless pipe.Single electron beam cold hearth melting technology prepares TC4
Titan alloy casting ingot has the ability of quality height and directly manufacture seamless pipe, but current technology mostly uses titanium sponge, in aluminium vanadium
Between alloy and aluminium shot be that raw material carries out direct melting after mixing, briquetting, drying, there are raw material mixing, and uneven, aluminium element exists
It volatilizees the disadvantages of irregular under high temperature high vacuum, leads to the ingot casting ingredient and nonuniform organization of melting, it is difficult to it is direct to meet ingot casting
Manufacture the requirement of seamless pipe.
Summary of the invention
The purpose of the present invention is to provide a kind of for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe,
By first by raw material uniform alloy, then electron beam cold hearth melting is carried out, prepares ingredient even tissue, is mingled with without high/low density
High-quality TC4 titan alloy casting ingot, realize overlength TC4 titanium alloy seamless pipe direct manufacture, shorten manufacturing process flow, improve
Lumber recovery significantly reduces production cost.
In order to achieve the above object, the technical solution adopted by the present invention is that: it is a kind of for directly manufacturing the TC4 titanium of seamless pipe
The preparation method of alloy cast ingot, specifically includes the following steps:
It (1) is 87 ~ 89%, Al 7.5 according to element mass fraction Ti using titanium sponge, aluminium vanadium intermediate alloy and aluminium shot as raw material
~ 8.5%, the ratio that V is 3.5 ~ 4.5% carries out ingredient.
(2) step (1) weighed raw material is subjected to briquetting, drying after mixing, vacuum plasma welding is used after drying
The method of connecing is prepared into electrode.
(3) electrode that step (2) obtains is put into melting in vacuum consumable electrode arc furnace makes raw alloy, fusion process
In, vacuum degree is 0.1Pa ~ 0.5Pa, and melting electric current is 14 ~ 16KA, and 31 ~ 33V of voltage, stabilising arc electric current is 18 ~ 20KA of direct current, is melted
Refining speed is 6 ~ 8kg/min.
(4) raw alloy that step (3) obtains is put into electron-beam cold bed furnace after surface strips off the skin processing and carries out melting, melted
During refining, vacuum degree is 0.1 ~ 0.5Pa, and speed of melting is 300 ~ 400kg/h, and it is 11 ~ 15mm/min that ingot speed degree is drawn in melting, is melted
Refining is completed to obtain the TC4 titan alloy casting ingot that can be used for directly manufacturing seamless pipe after the cooling 4 ~ 5h of ingot casting.
Titanium sponge grade is 0 grade in the step (1), Ti content >=99.7%;V element content is in aluminium vanadium intermediate alloy
50% ~ 60%, impurity content≤0.8%, surplus is Al element;Purity >=99.8% of Al beans.
Titanium sponge granularity is 8 ~ 13mm in the step (1);Aluminium vanadium intermediate alloy granularity is 5 ~ 10mm;Al beans degree is 15
~20mm。
Beneficial effects of the present invention:
The present invention makes full use of the advantages of electron beam cold hearth melting TC4 titan alloy casting ingot, by first by raw material uniform alloy, then
Carry out the new process of electron beam cold hearth melting, the height that ingredient even tissue can not only be prepared, be mingled with without high/low density
Quality TC4 titan alloy casting ingot, and the TC4 titanium alloy seamless pipe excellent in mechanical performance directly manufactured using the ingot casting, are contracted simultaneously
Its short manufacturing process flow and raising lumber recovery;Present invention process is simple and convenient to operate, TC4 titanium alloy can be significantly reduced without
Slit-tube production cost pushes its large-scale application, has apparent market application prospect.
Detailed description of the invention
Fig. 1 is the X ray diffracting spectrum of TC4 titan alloy casting ingot prepared by embodiment 1.
Fig. 2 is optical microstructure's pattern of TC4 titan alloy casting ingot prepared by embodiment 1.
Fig. 3 is the tensile stress strain curve for the seamless pipe that TC4 titan alloy casting ingot prepared by embodiment 1 obtains.
Fig. 4 is the tensile stress strain curve for the seamless pipe that TC4 titan alloy casting ingot prepared by embodiment 2 obtains.
Fig. 5 is the tensile stress strain curve for the seamless pipe that TC4 titan alloy casting ingot prepared by embodiment 3 obtains.
Specific embodiment
Invention is further described in detail With reference to embodiment, but protection scope of the present invention and unlimited
In the content.
Embodiment 1
(1) using titanium sponge, aluminium vanadium intermediate alloy and aluminium shot as raw material, according to element mass fraction Ti, Al, V be respectively 88%, 8%,
4% ratio carries out ingredient;Titanium sponge granularity is 9 ~ 11mm;Aluminium vanadium intermediate alloy granularity is 7 ~ 9mm;Al beans degree be 16 ~
18mm。
(2) step (1) weighed raw material is subjected to briquetting, drying after mixing, vacuum plasma welding is used after drying
The method of connecing is prepared into electrode.
(3) electrode that step (2) obtains is put into melting in vacuum consumable electrode arc furnace makes raw alloy, fusion process
In, vacuum degree is 0.1Pa ~ 0.5Pa, and melting electric current is 14KA, and voltage 31V, stabilising arc electric current is direct current 18KA, and speed of melting is
6kg/min。
(4) raw alloy that step (3) obtains is put into electron-beam cold bed furnace after surface strips off the skin processing and carries out melting, melted
Vacuum degree is 0.1Pa ~ 0.5Pa during refining, and speed of melting 300kg/h, it is 11mm/min that ingot speed degree is drawn in melting.
(5) (4) are obtained longitudinally being sampled inspection every same distance along ingot casting after TC4 titan alloy casting ingot optical surface
Its ingredient is surveyed, successively label 1.2.3 ..., chemical component are shown in Table 1 to sample, it is seen that it meets national standard GB/T 3620.1-2016
Requirement.
It surveys after completing to divide, carries out perforation with two roller taper Mannesmann piercing mills and obtain TC4 titanium alloy seamless pipe, along seamless pipe
It is longitudinal cut 3 tensile samples every identical distance, indices take mean value, the R of tubingp=912.3MPa、Rp0.2=
833.7Mpa,A%=10.5%.The seamless pipe mechanical property of its mechanical property and produced in conventional processes is close.
The TC4 titan alloy casting ingot chemical component prepared by the present invention of table 1 and national standard (mass fraction, %)
。
Embodiment 2
(1) using titanium sponge, aluminium vanadium intermediate alloy and aluminium shot as raw material, according to element mass fraction Ti, Al, V be respectively 88%, 8%,
4% ratio carries out ingredient;Titanium sponge granularity is 10 ~ 13mm;Aluminium vanadium intermediate alloy granularity is 8 ~ 10mm;Al beans degree be 18 ~
20mm。
(2) step (1) weighed raw material is subjected to briquetting, drying after mixing, vacuum plasma welding is used after drying
The method of connecing is prepared into electrode.
(3) electrode that step (2) obtains is put into melting in vacuum consumable electrode arc furnace makes raw alloy, fusion process
In, vacuum degree is 0.1Pa ~ 0.5Pa, and melting electric current is 16KA, and voltage 33V, stabilising arc electric current is direct current 19KA, and speed of melting is
8kg/min。
(4) raw alloy that step (3) obtains is put into electron-beam cold bed furnace after surface strips off the skin processing and carries out melting, melted
During refining, vacuum degree is 0.1Pa ~ 0.5Pa, and speed of melting 360kg/h, it is 13mm/min that ingot speed degree is drawn in melting.
(5) (4) are obtained being sampled along ingot casting is longitudinal every same distance after TC4 titanium alloy casting ingot car optical surface
Its ingredient is detected, successively label 1.2.3 ..., chemistry are shown in Table 2 to sample, it is seen that it meets national standard GB/T 3620.1-2016's
It is required that.
It surveys after completing to divide, carries out perforation with two roller taper Mannesmann piercing mills and obtain TC4 titanium alloy seamless pipe, along seamless pipe
It is longitudinal cut 3 tensile samples every identical distance, indices take mean value, the R of tubingp=914.6MPa、Rp0.2=
839.3Mpa、A%=11.3%。
The TC4 titan alloy casting ingot chemical component prepared by the present invention of table 2 and national standard (mass fraction, %)
。
Embodiment 3
(1) using titanium sponge, aluminium vanadium intermediate alloy and aluminium shot as raw material, according to element mass fraction Ti, Al, V be respectively 88%, 8%,
4% ratio carries out ingredient;Titanium sponge granularity is 8 ~ 10mm;Aluminium vanadium intermediate alloy granularity is 5 ~ 6mm;Al beans degree be 15 ~
17mm。
(2) step (1) weighed raw material is subjected to briquetting, drying after mixing, vacuum plasma welding is used after drying
The method of connecing is prepared into electrode.
(3) electrode that step (2) obtains is put into melting in vacuum consumable electrode arc furnace makes raw alloy, fusion process
In, vacuum degree is 0.1Pa ~ 0.45Pa, and melting electric current is 15KA, and voltage 32V, stabilising arc electric current is direct current 18KA, and speed of melting is
7kg/min。
(4) raw alloy that step (3) obtains is put into electron-beam cold bed furnace after surface strips off the skin processing and carries out melting, melted
Vacuum degree is 0.1Pa ~ 0.5Pa during refining, and speed of melting 400kg/h, it is 15mm/min that ingot speed degree is drawn in melting.
(5) (4) are obtained being sampled along ingot casting is longitudinal every same distance after TC4 titanium alloy casting ingot car optical surface
Its ingredient is detected, successively label 1.2.3 ..., chemistry are shown in Table 2 to sample, it is seen that it meets national standard GB/T 3620.1-2016's
It is required that.
It surveys after completing to divide, carries out perforation with two roller taper Mannesmann piercing mills and obtain TC4 titanium alloy seamless pipe, along seamless pipe
It is longitudinal cut 3 tensile samples every identical distance, indices take mean value, the R of tubingp=908.3MPa、Rp0.2=
831Mpa、A%=11.4%。
The TC4 titan alloy casting ingot chemical component prepared by the present invention of table 3 and national standard (mass fraction, %)
Fig. 1 is the X ray diffracting spectrum of TC4 titan alloy casting ingot prepared by embodiment 1, and TC4 titanium alloy is double as seen from the figure
Phase titanium alloy, Ti element and Al element and V element do not have the generation of intermediate compound, and Al element is all solid-solution in α-Ti, V member
Plain to be all solid-solution in β-Ti, so can not see these elements in map, Fig. 2 is TC4 titanium alloy casting prepared by embodiment 1
Optical microstructure's pattern of ingot, original β crystal boundary is high-visible as seen from the figure, and there are α boundling, α collection inside Original β grain
Beam is long and straight, and has biggish aspect ratio, and this tissue belongs to Widmannstatten structure, the TC4 titanium of the preparation of embodiment 2 and 3
Alloy cast ingot also has similar structure and property.
The above is only preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit simply modifies above embodiments, changes and the variation of equivalent structure, still falls within the technology of the present invention.
Claims (4)
1. a kind of for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe, which is characterized in that specifically include following
Step:
(1) using titanium sponge, aluminium vanadium intermediate alloy and aluminium shot as raw material, ingredient is carried out in ratio needed for element;
(2) step (1) weighed raw material is subjected to briquetting, drying after mixing, vacuum plasma welding side is used after drying
Method is prepared into electrode;
(3) electrode that step (2) obtains is put into melting in vacuum consumable electrode arc furnace makes raw alloy, in fusion process, very
Reciprocal of duty cycle is 0.1Pa ~ 0.5Pa, and melting electric current is 14 ~ 16KA, and 31 ~ 33V of voltage, stabilising arc electric current is 18 ~ 20KA of direct current, speed of melting
For 6 ~ 8kg/min;
(4) raw alloy that step (3) obtains is put into electron-beam cold bed furnace after surface strips off the skin processing and carries out melting, melting
Cheng Zhong, vacuum degree are 0.1 ~ 0.5Pa, and speed of melting is 300 ~ 400kg/h, and it is 11 ~ 15mm/min that ingot speed degree is drawn in melting, and melting is complete
The TC4 titan alloy casting ingot that can be used for directly manufacturing seamless pipe is obtained at after the cooling 4 ~ 5h of ingot casting.
2. according to claim 1 for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe, feature exists
In: titanium sponge grade is 0 grade in the step (1), Ti content >=99.7%;In aluminium vanadium intermediate alloy V element content be 50% ~
60%, impurity content≤0.8%, surplus is Al element;Purity >=99.8% of Al beans.
3. according to claim 1 for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe, feature exists
In: titanium sponge granularity is 8 ~ 13mm in the step (1);Aluminium vanadium intermediate alloy granularity is 5 ~ 10mm;Al beans degree be 15 ~
20mm。
4. according to claim 1 for directly manufacturing the preparation method of the TC4 titan alloy casting ingot of seamless pipe, feature exists
In: it be 87 ~ 89%, Al according to element mass fraction Ti in step (1) is that ratio that 7.5 ~ 8.5%, V is 3.5 ~ 4.5% carries out
Ingredient.
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Cited By (5)
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---|---|---|---|---|
CN112680614A (en) * | 2020-11-23 | 2021-04-20 | 昆明理工大学 | Cold cathode EB furnace smelting method for forging-free direct rolling Ti-Al-Nb-Zr-Mo alloy ingot |
CN112725647A (en) * | 2020-11-23 | 2021-04-30 | 昆明理工大学 | Short-process preparation method of Ti-Al-Nb-Zr-Mo alloy hot rolled plate |
CN112718909A (en) * | 2020-11-23 | 2021-04-30 | 昆明理工大学 | Short-process preparation method of Ti-Al-Nb-Zr-Mo alloy seamless tube |
CN112853129A (en) * | 2019-11-12 | 2021-05-28 | 新疆大学 | Short-process preparation method of aluminum-titanium-containing alloy |
CN113802023A (en) * | 2021-08-11 | 2021-12-17 | 昆明理工大学 | Ti-Al-based titanium alloy slab ingot smelting method capable of reducing Al element volatilization |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112853129A (en) * | 2019-11-12 | 2021-05-28 | 新疆大学 | Short-process preparation method of aluminum-titanium-containing alloy |
CN112680614A (en) * | 2020-11-23 | 2021-04-20 | 昆明理工大学 | Cold cathode EB furnace smelting method for forging-free direct rolling Ti-Al-Nb-Zr-Mo alloy ingot |
CN112725647A (en) * | 2020-11-23 | 2021-04-30 | 昆明理工大学 | Short-process preparation method of Ti-Al-Nb-Zr-Mo alloy hot rolled plate |
CN112718909A (en) * | 2020-11-23 | 2021-04-30 | 昆明理工大学 | Short-process preparation method of Ti-Al-Nb-Zr-Mo alloy seamless tube |
CN112680614B (en) * | 2020-11-23 | 2022-02-15 | 昆明理工大学 | Cold cathode EB furnace smelting method for forging-free direct rolling Ti-Al-Nb-Zr-Mo alloy ingot |
CN112718909B (en) * | 2020-11-23 | 2023-09-15 | 昆明理工大学 | Short-flow preparation method of Ti-Al-Nb-Zr-Mo alloy seamless pipe |
CN113802023A (en) * | 2021-08-11 | 2021-12-17 | 昆明理工大学 | Ti-Al-based titanium alloy slab ingot smelting method capable of reducing Al element volatilization |
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Application publication date: 20190712 |