CN1158397C - Process for vacuum induction smelting Ti-Al alloy - Google Patents
Process for vacuum induction smelting Ti-Al alloy Download PDFInfo
- Publication number
- CN1158397C CN1158397C CNB011334754A CN01133475A CN1158397C CN 1158397 C CN1158397 C CN 1158397C CN B011334754 A CNB011334754 A CN B011334754A CN 01133475 A CN01133475 A CN 01133475A CN 1158397 C CN1158397 C CN 1158397C
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- China
- Prior art keywords
- titanium
- furnace pressure
- aluminium
- argon gas
- make
- Prior art date
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- 239000000956 alloy Substances 0.000 title claims abstract description 16
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 15
- 229910004349 Ti-Al Inorganic materials 0.000 title claims abstract description 12
- 229910004692 Ti—Al Inorganic materials 0.000 title claims abstract description 12
- 230000006698 induction Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000003723 Smelting Methods 0.000 title claims abstract description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000011575 calcium Substances 0.000 claims abstract description 20
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 17
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 15
- 239000004411 aluminium Substances 0.000 claims abstract description 15
- 229910052786 argon Inorganic materials 0.000 claims abstract description 15
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 238000005266 casting Methods 0.000 claims abstract description 7
- 239000010936 titanium Substances 0.000 claims abstract description 5
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 3
- 230000004927 fusion Effects 0.000 abstract 2
- 239000000470 constituent Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a vacuum induction smelting technique for Ti-Al alloy, which uses a high-purity CaO crucible. The cold state ultimate vacuum of a vacuum induction furnace is smaller than or equal to 10<-4> tau. In the process, loading metallic aluminium into the CaO crucible, and placing sponge titanium and metal calcium into a feeder; carrying out vacuum pumping; the vacuum degree in the furnace reaches 10<-4> tau; leading argon gas to make the furnace pressure not less than 0.5 atm, and supplying the power to carry out fusion; adding the spongy titanium after aluminum liquid is clear, and mixing the aluminium liquid; after titanium-aluminium alloy liquid is clear, stirring the titanium-aluminium alloy liquid and carrying out vacuum pumping to make the furnace pressure not greater than 0.09 atm; leading argon gas to make the furnace pressure not less than 0.5 atm, and mixing the titanium-aluminium alloy liquid and adding 1% to 2% of metal calcium to carry out deoxidation; after the metal calcium is melted down, stirring the titanium-aluminium alloy liquid and carrying out the vacuum pumping to make the furnace pressure not greater than 0.09 atm; cutting the power to cool down; leading argon gas to make the furnace pressure not less than 0.8 atm, and supplying power to carry out fusion and casting. The present invention can produce the Ti-Al alloy with qualified chemical constituent, low impurity content and good quality.
Description
Technical field:
The present invention relates to the technology of preparing of titanium aluminum alloy, a kind of method for preparing aluminum titanium alloy with process for vacuum induction smelting is provided especially.
Background technology:
Ti-Al alloy and the target that shapes thereof are mainly used in multi-arc ion plating film, plated film on machine tool, can significantly improve the work-ing life of cutter and the working accuracy of product, so the purity to the Ti-Al alloy target material requires very strict, especially foreign matter contents such as C, O, N, their existence can reduce the work-ing life that is plated in the film on the cutter.
The method of smelting titanium alloy usually has two kinds, and a kind of is to carry out vacuum induction melting with graphite as crucible material, but its alloy pig carbon content that melts out is very high; Second kind is to adopt the vacuum electron beam melting, and this method is very effective to the material of pure metal or microalloying, but for the Ti-Al alloy that contains the 30%Al alloy element, its composition segregation is very serious.
The technology contents of invention:
The present invention adopts process for vacuum induction smelting, melts out Chemical Composition and up-to-standard Ti-Al alloy, it is characterized in that: adopt high-purity CaO matter crucible; Vacuum induction furnace cold conditions final vacuum≤1.33 * 10
-2KPa.
Specific embodiment of the present invention is as follows:
A dress metallic aluminium is in CaO matter crucible, and titanium sponge and calcium metal place feeder;
B vacuumizes, and vacuum tightness will reach 1.33 * 10 in the stove
-2KPa;
C leads to argon gas, makes furnace pressure be not less than 50KPa, send electrofusion;
D treats that aluminium liquefaction is clear, adds titanium sponge, stirs aluminium liquid;
E treats that titanium aluminum alloy liquefaction is clear, stirs titanium aluminum alloy liquid and vacuumize to make furnace pressure be not more than 9KPa;
F leads to argon gas, makes furnace pressure be not less than 50KPa, stirs titanium aluminum alloy liquid and adds 1%～2% calcium metal and carry out deoxidation;
G treats that calcium metal is molten clear, stirs titanium aluminum alloy liquid and vacuumize to make furnace pressure be not more than 9KPa;
The H cooling that has a power failure;
I leads to argon gas, makes furnace pressure be not less than 80KPa, send electrofusion and casting.
The present invention is with CaO crucible elder generation melting aluminum, and titanium adds with the alloy material form, thereby reduces the reaction of titanium and crucible material as far as possible; With the deoxidation of high activity metal calcium, and adopt and vacuumize for twice, to reach the purpose of degasification and kish calcium; High-pressure casting is with the gas hole defect inside and outside the elimination ingot casting simultaneously.Can produce (50～75% weight) Ti-(25～50% weight) Al alloy with technology of the present invention
Its impurity composition may command is as follows:
| C% weight | [N] % weight | [O] % weight | Ca% weight |
| ＜0.04 | ＜0.06 | ＜0.15 | ＜0.05 |
In a word, the present invention adopts high-purity CaO matter crucible by a process for vacuum induction smelting, carries out melting through the smelting technology with institute's invention technical characterictic, and it is qualified to produce Chemical Composition, and foreign matter content is low, superior in quality Ti-Al alloy.
Embodiment:
Embodiment 1
1 starting material
A:0 level titanium sponge B: fine aluminium
2 batching Chemical Composition
| Ti | Al | Ca |
| 70％ | 30％ | 1.5％ |
3 actual smelting technologyes
A: melting equipment is the 25kg vacuum induction furnace, its cold conditions highest attainable vacuum＞10
-4τ, 1700 ℃ of maximum operation (service) temperatures;
B: dress aluminium is in CaO matter crucible, and titanium sponge and calcium metal place feeder;
C: close bell and vacuumize, treat vacuum tightness≤1.33 * 10
-2KPa, applying argon gas is to 60KPa;
D: send electrofusion, treat that fine aluminiumization is clear, the 15KW power supply slowly adds titanium sponge;
E: treat that titanium sponge is molten fully clear in aluminium liquid, the 15KW power supply is evacuated to 8KPa;
F: applying argon gas is to 60KPa in the stove, and the 15KW power supply also slowly adds calcium metal;
G: treat that calcium metal is molten fully clear, the 15KW power supply also is evacuated to 8KPa, and cooling has a power failure;
G: applying argon gas send electrofusion and casting to 80KPa in stove.
Refine its Chemical Composition of alloy pig be analyzed as follows:
| Ti | Al | C | [N] | [O] | Ca |
| 69.8％ | 29.6％ | 0.02％ | ＜0.05％ | ＜0.1％ | 0.03％ |
Refine the Ti-Al alloy pig do not have inside and outside surface porosity and macrosegregation.
Embodiment 2
1 starting material
A:0 level titanium sponge B: fine aluminium
2 material Chemical Composition
| Ti | Al | Ca |
| 60％ | 40％ | 1.5％ |
3 border smelting technologyes
A: melting equipment is the 25kg vacuum induction furnace, its cold conditions highest attainable vacuum＞10
-4τ, 1700 ℃ of maximum operation (service) temperatures;
B: dress aluminium is in CaO matter crucible, and titanium sponge and calcium metal place feeder;
C: close bell and vacuumize, treat vacuum tightness≤1.33 * 10
-2KPa, applying argon gas is to 60KPa;
D: send electrofusion, treat that fine aluminiumization is clear, the 15KW power supply slowly adds titanium sponge;
E: treat that titanium sponge is molten fully clear in aluminium liquid, the 15KW power supply is evacuated to 8KPa;
F: applying argon gas is to 60KPa in the stove, and the 15KW power supply also slowly adds calcium metal;
G: treat that calcium metal is molten fully clear, the 15KW power supply also is evacuated to 8KPa, and cooling has a power failure;
G: applying argon gas send electrofusion and casting to 80KPa in stove.
Refine its Chemical Composition of alloy pig be analyzed as follows:
| Ti | Al | C | [N] | [O] | Ca |
| 59.2％ | 39.4％ | 0.018％ | ＜0.038％ | ＜0.07％ | 0.031％ |
Refine the Ti-Al alloy pig do not have inside and outside surface porosity and macrosegregation.
Claims (1)
1, a kind of process for vacuum induction smelting Ti-Al alloy, the proportioning of titanium aluminium are (50～75% weight) Ti-(25～50% weight) Al, and it is characterized in that: process is as follows:
A dress metallic aluminium is in CaO matter crucible, and titanium sponge and calcium metal place feeder;
B vacuumizes, and vacuum tightness will reach 1.33 * 10 in the stove
-2KPa;
C leads to argon gas, makes furnace pressure be not less than 50KPa, send electrofusion;
D treats that aluminium liquefaction is clear, adds titanium sponge, stirs aluminium liquid;
E treats that titanium aluminum alloy liquefaction is clear, stirs titanium aluminum alloy liquid and vacuumize to make furnace pressure be not more than 9KPa;
F leads to argon gas, makes furnace pressure be not less than 50KPa, stirs titanium aluminum alloy liquid and adds 1%～2% calcium metal and carry out deoxidation;
G treats that calcium metal is molten clear, stirs titanium aluminum alloy liquid and vacuumize to make furnace pressure be not more than 9KPa;
The H cooling that has a power failure;
I leads to argon gas, makes furnace pressure be not less than 80KPa, send electrofusion and casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011334754A CN1158397C (en) | 2001-11-21 | 2001-11-21 | Process for vacuum induction smelting Ti-Al alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011334754A CN1158397C (en) | 2001-11-21 | 2001-11-21 | Process for vacuum induction smelting Ti-Al alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1420189A CN1420189A (en) | 2003-05-28 |
| CN1158397C true CN1158397C (en) | 2004-07-21 |
Family
ID=4671842
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011334754A Expired - Fee Related CN1158397C (en) | 2001-11-21 | 2001-11-21 | Process for vacuum induction smelting Ti-Al alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1158397C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101121967B (en) * | 2006-08-09 | 2010-11-24 | 中国科学院金属研究所 | Method smelting TiAl-base alloy by vacuum induction |
| CN101440436B (en) * | 2007-11-21 | 2010-04-21 | 中国科学院金属研究所 | Purified smelting technique for high-temperature superalloy |
| CN101823137A (en) * | 2010-05-24 | 2010-09-08 | 陕西斯瑞工业有限责任公司 | Method for preparing TiAl alloy by adopting vacuum fusion casting method |
| CN102304633B (en) * | 2011-08-29 | 2012-10-03 | 西部钛业有限责任公司 | Manufacturing method of TA18 titanium alloy ingots |
| JP6392179B2 (en) * | 2014-09-04 | 2018-09-19 | 株式会社神戸製鋼所 | Method for deoxidizing Ti-Al alloy |
| CN110964945B (en) * | 2020-01-03 | 2021-03-12 | 北京科技大学 | Preparation method of Oxide Dispersion Strengthened (ODS) titanium and titanium alloy |
| CN111644610A (en) * | 2020-05-13 | 2020-09-11 | 西南科技大学 | Method for reducing oxygen content in titanium powder |
| CN112725658B (en) * | 2020-12-10 | 2022-01-18 | 先导薄膜材料（广东）有限公司 | Preparation method of titanium-aluminum alloy target |
| CN112981102B (en) * | 2021-02-04 | 2022-06-17 | 昆明理工大学 | Preparation of TiAl3Method for alloying and purifying Fe-containing waste aluminum alloy |
| CN113005259A (en) * | 2021-02-24 | 2021-06-22 | 成都先进金属材料产业技术研究院股份有限公司 | Vacuum induction melting method for controlling titanium element |
-
2001
- 2001-11-21 CN CNB011334754A patent/CN1158397C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1420189A (en) | 2003-05-28 |
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