CN104498769A - Titanium alloy with strength greater than 1400MPa - Google Patents
Titanium alloy with strength greater than 1400MPa Download PDFInfo
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- CN104498769A CN104498769A CN201410670345.8A CN201410670345A CN104498769A CN 104498769 A CN104498769 A CN 104498769A CN 201410670345 A CN201410670345 A CN 201410670345A CN 104498769 A CN104498769 A CN 104498769A
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- titanium alloy
- titanium
- consumable electrode
- alloy
- 1400mpa
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 38
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 40
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000010936 titanium Substances 0.000 claims abstract description 22
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 22
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 20
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 20
- 239000011733 molybdenum Substances 0.000 claims abstract description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 239000001257 hydrogen Substances 0.000 claims abstract description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 239000004411 aluminium Substances 0.000 claims description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005242 forging Methods 0.000 abstract description 12
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 43
- 238000002844 melting Methods 0.000 description 30
- 230000008018 melting Effects 0.000 description 30
- 239000000956 alloy Substances 0.000 description 29
- 229910045601 alloy Inorganic materials 0.000 description 28
- 238000003723 Smelting Methods 0.000 description 15
- 238000002156 mixing Methods 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 229910017116 Fe—Mo Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910011214 Ti—Mo Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the field of metal material technology, and relates to a titanium alloy with strength greater than 1400MPa. The titanium alloy provided by the invention consists of the following components by weight percentage: 9%-15% of molybdenum, 4%-8% of iron, 1%-5% of aluminum, no more than 0.08% of carbon, no more than 0.05% of nitrogen, no more than 0.015% of hydrogen, no more than 0.15% of oxygen and the balance of titanium. The titanium alloy of the invention has outstanding strength performance, tensile strength more than 1400 MPa, and good coupling of the strength-plasticity-toughness. The titanium alloy is not easy to crack during the forging process, easy for forming and low in processing cost, can be used as a key bearing component in aviation, also can be widely popularized and used in the fields of aerospace, weapons and other civilian usage, and has significant economic benefits.
Description
Technical field
The invention belongs to metallic substance technology, relate to the titanium alloy that a kind of intensity is greater than 1400MPa.
Background technology
Along with the great-leap-forward high speed development of the weaponry of new generation such as hypersonic aircraft, UCAV, high stealthy high maneuvering-vehicle, strategic bomber, variant aircraft and new concept weapon, development superhigh intensity titanium alloy material, reach more high strength, high tenacity, damage tolerance, high fatigue property, low cost and the Good All-around Property requirement such as can to weld, with the lightweight of satisfied weaponry of new generation and long-life design and use target, demand is very urgent.
At present, the performance potential of restriction superhigh intensity titanium alloy plays and the major cause applied on weaponry of new generation is superhigh intensity titanium alloy improving constantly along with intensity, and the over-all propertieies such as plasticity, toughness, fatigue property, damage tolerance performance have thereupon and reduce to some extent.Such as, the GUM alloy of Japanese invention, intensity reaches the level of 1800 ~ 2000MPa, but plasticity does not improve, and unit elongation is only about 5%, and toughness is lower.Its intensity of TB20 superhigh intensity titanium alloy of China's exploratory development also can reach more than 1350MPa, but can only be applied in the small dimension work in-process such as a material fastening piece, for the manufacture of plasticity during heavy thickness forging and toughness lower, fracture toughness only has
left and right, thus limit the application of its further genralrlization.
Summary of the invention
The object of the invention is: propose a kind ofly to meet the titanium alloy that intensity reaches more than 1400MPa and good over-all properties coupling simultaneously.
Technical scheme of the present invention is: the weight percent of titanium alloy consists of: molybdenum 9% ~ 15%, iron 4% ~ 8%, aluminium 1% ~ 5%, carbon≤0.08%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.15%, surplus are titanium.
The step of preparation is as follows:
1, prepare electrode: the weight percent according to the following element of this alloy: molybdenum 9% ~ 15%, iron 4% ~ 8%, aluminium 1% ~ 5%, surplus are titanium, determine that material composition carries out batch mixing, after batch mixing, be pressed into consumable electrode with pressing machine;
2, first time vacuum consumable electrode arc furnace melting: consumable electrode is loaded vacuum consumable electrode arc furnace and carry out melting, smelting temperature is 1850 DEG C ~ 2050 DEG C, obtains an ingot casting at crystallizer;
3, second time vacuum consumable electrode arc furnace melting: carry out the melting of second time vacuum consumable electrode arc furnace by an ingot casting as consumable electrode, smelting temperature 1800 DEG C ~ 2000 DEG C, obtain secondary ingot casting at crystallizer;
4, third time vacuum consumable electrode arc furnace melting: carry out third time vacuum consumable electrode arc furnace melting by secondary ingot casting as consumable electrode, smelting temperature is 1800 DEG C ~ 2000 DEG C, obtains three ingot castings at crystallizer;
5, prepare finished product titan alloy casting ingot: three ingot castings are cut rising head and heelpiece, removes surface scale, and obtain finished product titan alloy casting ingot at head, tail after carrying out chamfered.
Advantage of the present invention is:
Titanium alloy of the present invention has outstanding strength property, and tensile strength can reach more than 1400MPa, and yield strength can reach more than 1300MPa, and have the coupling of good intensity-plasticity-toughness, wherein, unit elongation reaches more than 6%, relative reduction in area reaches more than 10%, and fracture toughness reaches
this alloy is not easy to crack in forging process, is easy to be shaped, and tooling cost is low.Can be used as the crucial load-carrying member of aviation, also can be applicable in space flight, weapons, the field such as civilian, remarkable in economical benefits.
Embodiment
Below the present invention is described in further details.The weight percent of titanium alloy of the present invention consists of: molybdenum 9% ~ 15%, iron 4% ~ 8%, aluminium 1% ~ 5%, carbon≤0.08%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.15%, surplus are titanium.
The step of preparation is as follows:
1, prepare electrode: the weight percent according to the following element of this alloy: molybdenum 9% ~ 15%, iron 4% ~ 8%, aluminium 1% ~ 5%, surplus are titanium, determine that material composition carries out batch mixing, after batch mixing, be pressed into consumable electrode with pressing machine;
2, first time vacuum consumable electrode arc furnace melting: consumable electrode is loaded vacuum consumable electrode arc furnace and carry out melting, smelting temperature is 1850 DEG C ~ 2050 DEG C, obtains an ingot casting at crystallizer;
3, second time vacuum consumable electrode arc furnace melting: carry out the melting of second time vacuum consumable electrode arc furnace by an ingot casting as consumable electrode, smelting temperature 1800 DEG C ~ 2000 DEG C, obtain secondary ingot casting at crystallizer;
4, third time vacuum consumable electrode arc furnace melting: carry out third time vacuum consumable electrode arc furnace melting by secondary ingot casting as consumable electrode, smelting temperature is 1800 DEG C ~ 2000 DEG C, obtains three ingot castings at crystallizer;
5, prepare finished product titan alloy casting ingot: three ingot castings are cut rising head and heelpiece, removes surface scale, and obtain finished product titan alloy casting ingot at head, tail after carrying out chamfered.
Principle of work of the present invention is: this alloy adds a large amount of beta stable element molybdenum elements and ferro element, can play good solution strengthening effect, significantly improve alloy strength, and reduce phase point temperature, improves hardening capacity, strengthens heat treatment reinforcement effect.The effect of solution strengthening is not only played in the interpolation of this Aluminum in Alloy element, can also reduce alloy density.Therefore, alloy, after double annealing, has outstanding strength property and good over-all properties coupling.
Embodiment 1
The weight percent of titanium alloy consists of: molybdenum: 12%, iron: 5%, aluminium: 3%, carbon: 0.02%, nitrogen: 0.007%, hydrogen: 0.008%, oxygen: 0.062%, and surplus is titanium
The step of preparation is as follows:
1, electrode is prepared: adopt titanium sponge, commercial-purity aluminium, Al-Mo master alloy and Fe-Mo master alloy to be raw material, batch mixing is carried out: molybdenum: 12%, iron: 5%, aluminium: 3%, surplus is titanium by following weight percent, after batch mixing, be pressed into consumable electrode with pressing machine;
2, first time vacuum consumable electrode arc furnace melting: consumable electrode is loaded vacuum consumable electrode arc furnace and carry out melting, smelting temperature is 1850 DEG C ~ 2050 DEG C, obtains an ingot casting at crystallizer;
3, second time vacuum consumable electrode arc furnace melting: carry out the melting of second time vacuum consumable electrode arc furnace by an ingot casting as consumable electrode, smelting temperature 1800 DEG C ~ 2000 DEG C, obtain secondary ingot casting at crystallizer;
4, third time vacuum consumable electrode arc furnace melting: carry out third time vacuum consumable electrode arc furnace melting by secondary ingot casting as consumable electrode, smelting temperature is 1800 DEG C ~ 2000 DEG C, obtains three ingot castings at crystallizer;
5, finished product titan alloy casting ingot: three ingot castings are cut rising head and heelpiece, removes surface scale, and obtain finished product titan alloy casting ingot at head, tail after carrying out chamfered;
6, finished product titan alloy casting ingot is carried out four fire time coggings at 1050 DEG C, 1000 DEG C, 980 DEG C, 930 DEG C, control pass deformation between 25% ~ 40%, make forging stock;
7, forging stock is carried out four fire at 770 DEG C and change forging, pass deformation, between 30% ~ 50%, finally makes φ 120mm bar.
According to GJB GJB 3763A-2004 " titanium or titanium alloy thermal treatment ", to the heat treating regime that finished product bar adopts be: 780 DEG C/30min, AC+510 DEG C/12h, AC, then carry out performance test.The result recorded is: tensile strength is 1550MPa, and yield strength is 1498MPa, and unit elongation is 8.3%, relative reduction in area 17.9%, fracture toughness K
iCfor
Embodiment 2:
The weight percent of titanium alloy consists of: molybdenum: 9%, iron: 8%, aluminium: 5%, carbon: 0.01%, nitrogen: 0.005%, hydrogen: 0.0017%, oxygen: 0.074%, and surplus is titanium.
The step of preparation is as follows:
1, electrode is prepared: adopt titanium sponge, commercial-purity aluminium, pure iron silk, Fe-Mo master alloy to be raw material, carry out batch mixing by following weight percent: molybdenum: 9%, iron: 8%, aluminium: 5%, surplus is titanium, after batch mixing, be pressed into consumable electrode with pressing machine;
2, first time vacuum consumable electrode arc furnace melting: consumable electrode is loaded vacuum consumable electrode arc furnace and carry out melting, smelting temperature is 1850 DEG C ~ 2050 DEG C, obtains an ingot casting at crystallizer;
3, second time vacuum consumable electrode arc furnace melting: carry out the melting of second time vacuum consumable electrode arc furnace by an ingot casting as consumable electrode, smelting temperature 1800 DEG C ~ 2000 DEG C, obtain secondary ingot casting at crystallizer;
4, third time vacuum consumable electrode arc furnace melting: carry out third time vacuum consumable electrode arc furnace melting by secondary ingot casting as consumable electrode, smelting temperature is 1800 DEG C ~ 2000 DEG C, obtains three ingot castings at crystallizer;
5, finished product titan alloy casting ingot: three ingot castings are cut rising head and heelpiece, removes surface scale, and obtain finished product titan alloy casting ingot at head, tail after carrying out chamfered;
6, finished product titan alloy casting ingot is carried out four fire time coggings at 1050 DEG C, 1000 DEG C, 980 DEG C, 930 DEG C, control pass deformation between 25% ~ 40%, make forging stock;
7, forging stock is carried out five fire at 760 DEG C and change forging, pass deformation, between 30% ~ 50%, finally makes φ 50mm bar.
According to GJB GJB 3763A-2004 " titanium or titanium alloy thermal treatment ", to the heat treating regime that finished product bar adopts be: 770 DEG C/30min, AC+500 DEG C/12h, AC, then carry out performance test.The result recorded is: tensile strength is 1627MPa, and yield strength is 1550MPa, and unit elongation is 6.3%, relative reduction in area 15.2%, fracture toughness K
iCfor
Embodiment 3:
The weight percent of titanium alloy consists of: molybdenum: 15%, iron: 4%, aluminium: 1%, carbon: 0.03%, nitrogen: 0.008%, hydrogen: 0.008%, oxygen: 0.082%, and surplus is titanium.
The step of preparation is as follows:
1, electrode is prepared: adopt titanium sponge, Al-Mo master alloy, Fe-Mo master alloy, Ti-Mo master alloy to be raw material, batch mixing is carried out: molybdenum: 15%, iron: 4%, aluminium: 1%, surplus is titanium by following weight percent, after batch mixing, be pressed into consumable electrode with pressing machine;
2, first time vacuum consumable electrode arc furnace melting: consumable electrode is loaded vacuum consumable electrode arc furnace and carry out melting, smelting temperature is 1850 DEG C ~ 2050 DEG C, obtains an ingot casting at crystallizer;
3, second time vacuum consumable electrode arc furnace melting: carry out the melting of second time vacuum consumable electrode arc furnace by an ingot casting as consumable electrode, smelting temperature 1800 DEG C ~ 2000 DEG C, obtain secondary ingot casting at crystallizer;
4, third time vacuum consumable electrode arc furnace melting: carry out third time vacuum consumable electrode arc furnace melting by secondary ingot casting as consumable electrode, smelting temperature is 1800 DEG C ~ 2000 DEG C, obtains three ingot castings at crystallizer;
5, finished product titan alloy casting ingot: three ingot castings are cut rising head and heelpiece, removes surface scale, and obtain finished product titan alloy casting ingot at head, tail after carrying out chamfered;
6, finished product titan alloy casting ingot is carried out three fire time coggings at 1070 DEG C, 1020 DEG C, 980 DEG C, 930 DEG C, control pass deformation between 25% ~ 40%, make forging stock;
7, forging stock is carried out three fire at 780 DEG C and change forging, pass deformation, between 30% ~ 50%, finally makes φ 150mm bar.
According to GJB GJB 3763A-2004 " titanium or titanium alloy thermal treatment ", to the heat treating regime that finished product bar adopts be: 770 DEG C/30min, AC+520 DEG C/12h, AC, then carry out performance test.The result recorded is: tensile strength is 1450MPa, and yield strength is 1380MPa, and unit elongation is 10.3%, relative reduction in area 23.6%, fracture toughness K
iCfor
Claims (8)
1. intensity is greater than a titanium alloy of 1400MPa, it is characterized in that: the weight percent of this titanium alloy consists of: molybdenum 9% ~ 15%, iron 4% ~ 8%, aluminium 1% ~ 5%, carbon≤0.08%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.15%, surplus are titanium.
2. a kind of intensity according to claim 1 is greater than the titanium alloy of 1400MPa, it is characterized in that: the weight percent of this titanium alloy consists of: molybdenum 14% ~ 15%, iron 4% ~ 5%, aluminium 1% ~ 2%, surplus are titanium.
3. a kind of intensity according to claim 1 is greater than the titanium alloy of 1400MPa, it is characterized in that: the weight percent of this titanium alloy consists of: molybdenum 13% ~ 14%, iron 5% ~ 6%, aluminium 2% ~ 3%, surplus are titanium.
4. a kind of intensity according to claim 1 is greater than the titanium alloy of 1400MPa, it is characterized in that: the weight percent of this titanium alloy consists of: molybdenum 12% ~ 13%, iron 6% ~ 7%, aluminium 3% ~ 4%, surplus are titanium.
5. a kind of intensity according to claim 1 is greater than the titanium alloy of 1400MPa, it is characterized in that: the weight percent of this titanium alloy consists of: molybdenum 11% ~ 12%, iron 7% ~ 8%, aluminium 4% ~ 5%, surplus are titanium.
6. a kind of intensity according to claim 1 is greater than the titanium alloy of 1400MPa, it is characterized in that: the weight percent of this titanium alloy consists of: molybdenum 10% ~ 11%, iron 7% ~ 8%, aluminium 4% ~ 5%, surplus are titanium.
7. a kind of intensity according to claim 1 is greater than the titanium alloy of 1400MPa, it is characterized in that: the weight percent of this titanium alloy consists of: molybdenum 9% ~ 10%, iron 7% ~ 8%, aluminium 4% ~ 5%, surplus are titanium.
8. a kind of intensity according to claim 1 is greater than the titanium alloy of 1400MPa, it is characterized in that: the weight percent of this titanium alloy consists of: the weight percent of titanium alloy consists of: molybdenum: 12%, iron: 5%, aluminium: 3%, surplus is titanium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410670345.8A CN104498769A (en) | 2014-11-20 | 2014-11-20 | Titanium alloy with strength greater than 1400MPa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410670345.8A CN104498769A (en) | 2014-11-20 | 2014-11-20 | Titanium alloy with strength greater than 1400MPa |
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| Publication Number | Publication Date |
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| CN104498769A true CN104498769A (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410670345.8A Pending CN104498769A (en) | 2014-11-20 | 2014-11-20 | Titanium alloy with strength greater than 1400MPa |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058092A (en) * | 2016-06-28 | 2016-10-26 | 普定县银丰农业科技发展有限公司 | Low-cost titanium alloy energy-saving vehicle storage battery shell and manufacturing method and machining method thereof |
| CN106090461A (en) * | 2016-08-23 | 2016-11-09 | 常熟市双羽铜业有限公司 | A kind of light-high-strength titanium plastic composite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294267A (en) * | 1992-12-04 | 1994-03-15 | Titanium Metals Corporation | Metastable beta titanium-base alloy |
| JP5353754B2 (en) * | 2009-02-19 | 2013-11-27 | 新日鐵住金株式会社 | Metastable β-type titanium alloy having low Young's modulus and method for producing the same |
-
2014
- 2014-11-20 CN CN201410670345.8A patent/CN104498769A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294267A (en) * | 1992-12-04 | 1994-03-15 | Titanium Metals Corporation | Metastable beta titanium-base alloy |
| EP0600579A1 (en) * | 1992-12-04 | 1994-06-08 | Titanium Metals Corporation | Metastable beta titanium-base alloy |
| JP5353754B2 (en) * | 2009-02-19 | 2013-11-27 | 新日鐵住金株式会社 | Metastable β-type titanium alloy having low Young's modulus and method for producing the same |
Non-Patent Citations (2)
| Title |
|---|
| 刑淑仪等: "《铝合金和钛合金》", 31 October 1987, article "钛合金", pages: 106-108 * |
| 莫畏等: "《钛冶金，第2版》", 30 June 1979 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058092A (en) * | 2016-06-28 | 2016-10-26 | 普定县银丰农业科技发展有限公司 | Low-cost titanium alloy energy-saving vehicle storage battery shell and manufacturing method and machining method thereof |
| CN106090461A (en) * | 2016-08-23 | 2016-11-09 | 常熟市双羽铜业有限公司 | A kind of light-high-strength titanium plastic composite |
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