CN101775524A - Titanium alloy material and preparation method thereof - Google Patents
Titanium alloy material and preparation method thereof Download PDFInfo
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- CN101775524A CN101775524A CN200910151838A CN200910151838A CN101775524A CN 101775524 A CN101775524 A CN 101775524A CN 200910151838 A CN200910151838 A CN 200910151838A CN 200910151838 A CN200910151838 A CN 200910151838A CN 101775524 A CN101775524 A CN 101775524A
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Abstract
The invention discloses a titanium alloy material. The titanium alloy material is characterized by comprising the following compositions in percentage by weight: 4 to 9 percent of molybdenum, 3 to 6 percent of niobium, 1 to 5 percent of tantalum, 2 to 5 percent of chromium, 2 to 6 percent of zirconium, 1 to 4 percent of aluminum and the balance of titanium and inevitable impurities. The preparation method comprises the following steps: after mixing the raw materials in the proportion, pressing mixture into a block electrode by an oil press; after welding the electrode into a long strip electrode by an ion welding group, smelting for 2 to 3 times in a vacuum consumable electro-arc furnace to obtain a finished product of a titanium alloy ingot; after finishing the smelted titanium alloy ingot, forging the titanium alloy ingot into a cylindrical blank at the temperature of between 950 and 1,100 DEG C; forging the blank at the temperature of between 900 and 1,000 DEG C and rolling the blank at the temperature of between 750 and 900 DEG C into a bar material or a plate material; and performing solid solution and ageing heat treatment on the manufactured bar material or plate material. As the prepared titanium alloy material is subjected to beta-phase region solid solution and two-phase region ageing heat treatment, the tensile strength of the material is improved from 1,250MPa of the prior art to 1,500 to 1,560MPa; and the elongation is improved from 4 percent of the prior art to 6 to 10 percent.
Description
Technical field
The present invention relates to a kind of titanium alloy material, particularly the high-strength high-ductility titanium alloy material.The preparation method who also relates to this titanium alloy material.
Background technology
Demand to high speed and raising fuel efficiency makes novel aerospace flight vehicle adopt the higher titanium alloy material of comprehensive mechanical property more and more in design, elastic elements such as fastening piece, high-strength spring, aircraft carrier ejector and plate armours etc. such as the frame beam class load-carrying member of weaponrys such as space flight in addition,, weapons, boats and ships, load bolt all have more and more urgent demand to the high intensity and high ductility titanium alloy.
High strength titanium alloy is generally metastable beta titanium alloy, has heat-treatable strengthened preferably characteristic, excellent formability, bigger specific tenacity, darker hardening capacity, and can obtain higher intensity-plasticity-advantages such as toughness coupling.Present known superhigh intensity titanium alloy has TB8 (Ti-15Mo-2.7Nb-3Al-0.2Si), TB9 (Ti-3Al-8V-6Cr-4Mo-4Zr), TB19 (Ti-5Mo-5V-4Cr-2Zr-3Al), TB20 types such as (Ti-5Mo-4V-2Cr-2Zr-1Fe-2Sn-3.5Al).In these several titanium alloys, except that the tensile strength of TB20 titanium alloy is the 1350MPa, the tensile strength of TB8 titanium alloy, TB9 titanium alloy, TB19 titanium alloy all is no more than 1250MPa, their tensile strength all can not surpass 1500MPa, even, make its tensile strength meet or exceed 1500MPa, at this moment by extreme heat treatment reinforcement, the unit elongation of titanium alloy drops to below 4%, can not satisfy in the practical application demand to superstrength high-ductility titanium alloy.
Summary of the invention
Prior art titanium alloy tensile strength is low in order to overcome, the deficiency of plasticity difference, the invention provides a kind of titanium alloy material, after the solid solution of β phase region, the thermal treatment of two-phase region timeliness, can improve its unit elongation when improving tensile strength.
The technical solution adopted for the present invention to solve the technical problems: a kind of titanium alloy material is characterized in that: be made up of following weight per-cent, wherein, molybdenum 4～9%, niobium 3～6%, tantalum 1～5%, chromium 2～5%, zirconium 2～6%, aluminium 1～4%, surplus is titanium and unavoidable impurities, the weight percent of impurity, iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
A kind of preparation method of above-mentioned titanium alloy material is characterized in comprising the steps:
(a) according to following weight per-cent: molybdenum 4～9%, niobium 3～6%, tantalum 1～5%, chromium 2～5%, zirconium 2～6%, aluminium 1～4%, surplus is the titanium batching, behind abundant batch mixing, is pressed into block electrode;
(b) at least two block type electrodes are welded into the strip electrode with the ion soldering group;
(c) the strip electrode is carried out 2～3 meltings, cast titanium alloy pig in vacuum consumable electrode arc furnace;
(d) after the titanium alloy ingot finishing with step (c) preparation, under 950～1100 ℃ of conditions, forge into cylindric blank;
(e) blank is rolling through 900～1000 ℃ of forgings, 750～900 ℃ again, makes titanium alloy rod bar or sheet material;
(f) titanium alloy rod bar or sheet material are carried out the solid solution of β phase region, the thermal treatment of two-phase region timeliness.
The invention has the beneficial effects as follows: prepared aluminium alloy is after the solid solution of β phase region, the thermal treatment of two-phase region timeliness, and tensile strength is brought up to 1500～1560MPa by the 1250MPa of prior art, and simultaneously unit elongation brings up to 6～10% by prior art below 4%.Concrete mechanical property sees the following form:
| Embodiment | ??Rm(MPa) | ??Rp0.2(MPa) | ??A(％) | ??Z(％) |
| Embodiment 1 | ??1010 | ??980 | ??17 | ??63.5 |
| Embodiment 2 | ??1010 | ??970 | ??18.5 | ??64 |
| Embodiment 3 | ??1560 | ??1580 | ??6 | ??19 |
| Embodiment 4 | ??1510 | ??1470 | ??10 | ??28 |
| Embodiment 5 | ??1560 | ??1510 | ??6 | ??19 |
| Embodiment 6 | ??1500 | ??1460 | ??8 | ??27 |
| Embodiment 7 | ??1510 | ??1470 | ??8 | ??25 |
| Embodiment 8 | ??1550 | ??1510 | ??6 | ??20 |
| Embodiment 9 | ??1530 | ??1490 | ??7 | ??23 |
Below in conjunction with embodiment the present invention is elaborated.
Embodiment
Embodiment 1: the weight percent of titanium alloy consists of:
Molybdenum 6.5%, niobium 4.5%, tantalum 3%, chromium 3.5%, zirconium 4%, aluminium 2.5% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, zirconium sponge, fine aluminium, pure chromium, Ti-50%Mo, Ti-53%Nb, Al-80%Ta are raw material, components by weight percentage is a molybdenum: niobium 6.5%: tantalum 4.5%: chromium 3%: zirconium 3.5%: aluminium 4%: 2.5% carry out abundant batch mixing after, be pressed into block electrode with oil press.
Two, three cube electrodes are welded into the strip electrode with the ion soldering group.
Three, the strip electrode is carried out 2 meltings in vacuum consumable electrode arc furnace, analyse through the alloy composition and detect acquisition finished product titanium alloy ingot.
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1100 ℃.
Five, blank is rolled into bar through 1000 ℃ of forgings, 825 ℃.
Six, through detecting after 860 ℃ of solution treatment, Rm is 1010MPa, and Rp0.2 is 980MPa, and A (%) is 17, and Z (%) is 63.5.
Embodiment 2: the weight percent of titanium alloy consists of:
Molybdenum 4%, niobium 3%, tantalum 1%, chromium 5%, zirconium 4%, aluminium 2.5% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.2%, carbon≤0.05%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, fine aluminium, pure chromium, zirconium sponge, Ti-50%Mo, Ti-53%Nb, Al-80%Ta is a raw material, and components by weight percentage is a molybdenum: niobium 4%: tantalum 3%: chromium 1%: zirconium 5%: aluminium 4%: 2.5% carry out abundant batch mixing after, be pressed into block electrode with oil press;
Two, two block type electrodes are welded into the strip electrode with the ion soldering group.
Three, the strip electrode is carried out 3 meltings in vacuum consumable electrode arc furnace, analyse through the alloy composition and detect acquisition finished product titanium alloy ingot.
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1050 ℃.
Five, blank is rolled into sheet material through 950 ℃ of forgings, 825 ℃.
Six, through detecting after 900 ℃ of solution treatment, Rm is 1010MPa, and Rp0.2 is 970MPa, and A (%) is 18.5, and Z (%) is 64.
Embodiment 3: the weight percent of titanium alloy consists of:
Molybdenum 9%, niobium 6%, tantalum 5%, chromium 2%, zirconium 4%, aluminium 2.5% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, fine aluminium, pure chromium, zirconium sponge, Ti-50%Mo, Ti-53%Nb, Al-80%Ta is a raw material, and components by weight percentage is a molybdenum: niobium 9%: tantalum 6%: chromium 5%: zirconium 2%: aluminium 4%: 2.5% carry out abundant batch mixing after, be pressed into block electrode with oil press.
Two, three block type electrodes are welded into the strip electrode with the ion soldering group.
Three, the strip electrode is carried out 2 in vacuum consumable electrode arc furnace.Inferior melting is analysed detection through the alloy composition and is obtained the finished product titanium alloy ingot.
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1000 ℃.
Five, blank is rolled into bar through 900 ℃ of forgings, 825 ℃.
Six, through detecting behind 900 ℃ of solution treatment, 500 ℃ of ageing treatment 16h, Rm is 1560MPa, and Rp0.2 is 1580MPa, and A (%) is 6, and Z (%) is 19.
Embodiment 4: the weight percent of titanium alloy consists of:
Molybdenum 9%, niobium 3%, tantalum 1%, chromium 2%, zirconium 4%, aluminium 2.5% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.2%, carbon≤0.05%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, fine aluminium, pure chromium, zirconium sponge, Ti-50%Mo, Ti-53%Nb, Al-80%Ta is a raw material, and components by weight percentage is a molybdenum: niobium 9%: tantalum 3%: chromium 1%: zirconium 2%: aluminium 4%: 2.5% carry out abundant batch mixing after, be pressed into block electrode with oil press;
Two, four block type electrodes are welded into the strip electrode with the ion soldering group;
Three, the strip electrode is carried out 3 meltings in vacuum consumable electrode arc furnace, analyse through the alloy composition and detect acquisition finished product titanium alloy ingot;
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1100 ℃;
Five, blank is rolled into bar or sheet material through 1000 ℃ of forgings, 750 ℃.
Six, through detecting behind 900 ℃ of solution treatment, 300 ℃ of ageing treatment 2h, 500 ℃ of ageing treatment 16h, Rm is 1510MPa, and Rp0.2 is 1470MPa, and A (%) is 10, and Z (%) is 28.
Embodiment 5: the weight percent of titanium alloy consists of:
Molybdenum 4%, niobium 6%, tantalum 5%, chromium 3.5%, zirconium 4%, aluminium 2.5% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, fine aluminium, pure chromium, zirconium sponge, Ti-50%Mo, Ti-53%Nb, Al-80%Ta are raw material, components by weight percentage is a molybdenum: niobium 4%: tantalum 6%: chromium 5%: zirconium 3.5%: aluminium 4%: 2.5% carry out abundant batch mixing after, be pressed into block electrode with oil press.
Two, three block type electrodes are welded into the strip electrode with the ion soldering group.
Three, the strip electrode is carried out 3 meltings in vacuum consumable electrode arc furnace, analyse through the alloy composition and detect acquisition finished product titanium alloy ingot.
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1100 ℃.
Five, blank is rolled into bar or sheet material through 1000 ℃ of forgings, 900 ℃.
Six, through detecting behind 860 ℃ of solution treatment, 500 ℃ of ageing treatment 16h, Rm is 1560MPa, and Rp0.2 is 1510MPa, and A (%) is 6, and Z (%) is 19.
Embodiment 6: the weight percent of titanium alloy consists of:
Molybdenum 6.5%, niobium 4.5%, tantalum 3%, chromium 3.5%, zirconium 6%, aluminium 1% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, fine aluminium, pure chromium, zirconium sponge, Ti-50%Mo, Ti-53%Nb, Al-80%Ta are raw material, components by weight percentage is a molybdenum: niobium 6.5%: tantalum 4.5%: chromium 3%: zirconium 3.5%: aluminium 6%: 1% carry out abundant batch mixing after, be pressed into block electrode with oil press.
Two, four block type electrodes are welded into the strip electrode with the ion soldering group.
Three, the strip electrode is carried out 3 meltings in vacuum consumable electrode arc furnace, analyse through the alloy composition and detect acquisition finished product titanium alloy ingot.
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1100 ℃.
Five, blank is rolled into bar or sheet material through 950 ℃ of forgings, 825 ℃.
Six, through detecting behind 860 ℃ of solution treatment, 500 ℃ of ageing treatment 16h, Rm is 1500MPa, and Rp0.2 is 1460MPa, and A (%) is 8, and Z (%) is 27.
Embodiment 7: the weight percent of titanium alloy consists of:
Molybdenum 6.5%, niobium 4.5%, tantalum 3%, chromium 3.5%, zirconium 2%, aluminium 4% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, fine aluminium, pure chromium, zirconium sponge, Ti-50%Mo, Ti-53%Nb, Al-80%Ta are raw material, components by weight percentage is a molybdenum: niobium 6.5%: tantalum 4.5%: chromium 3%: zirconium 3.5%: aluminium 2%: 4% carry out abundant batch mixing after, be pressed into block electrode with oil press;
Two, five block type electrodes are welded into the strip electrode with the ion soldering group;
Three, the strip electrode is carried out 2 meltings in vacuum consumable electrode arc furnace, analyse through the alloy composition and detect acquisition finished product titanium alloy ingot;
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1050 ℃;
Five, blank is rolled into bar or sheet material through 950 ℃ of forgings, 750 ℃.
Six, through detecting behind 860 ℃ of solution treatment, 500 ℃ of ageing treatment 16h, Rm is 1510MPa, and Rp0.2 is 1470MPa, and A (%) is 8, and Z (%) is 25.
Embodiment 8: the weight percent of titanium alloy consists of:
Molybdenum 4%, niobium 3%, tantalum 1%, chromium 5%, zirconium 6%, aluminium 1% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, fine aluminium, pure chromium, zirconium sponge, Ti-50%Mo, Ti-53%Nb, Al-80%Ta is a raw material, and components by weight percentage is a molybdenum: niobium 4%: tantalum 3%: chromium 1%: zirconium 5%: aluminium 6%: 1% carry out abundant batch mixing after, be pressed into block electrode with oil press;
Two, six block type electrodes are welded into the strip electrode with the ion soldering group;
Three, the strip electrode is carried out 3 meltings in vacuum consumable electrode arc furnace, analyse through the alloy composition and detect acquisition finished product titanium alloy ingot;
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1050 ℃;
Five, blank is rolled into bar or sheet material through 950 ℃ of forgings, 900 ℃.
Six, through detecting behind 860 ℃ of solution treatment, 500 ℃ of ageing treatment 16h, Rm is 1550MPa, and Rp0.2 is 1510MPa, and A (%) is 6, and Z (%) is 20.
Embodiment 9: the weight percent of titanium alloy consists of:
Molybdenum 9%, niobium 6%, tantalum 5%, chromium 2%, zirconium 2%, aluminium 4% surplus is titanium and unavoidable impurities, wherein the weight percent of impurity is: iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
The preparation method of this titanium alloy may further comprise the steps:
One, adopts titanium sponge, fine aluminium, pure chromium, zirconium sponge, Ti-50%Mo, Ti-53%Nb, Al-80%Ta is a raw material, and components by weight percentage is a molybdenum: niobium 9%: tantalum 6%: chromium 5%: zirconium 2%: aluminium 2%: 4% carry out abundant batch mixing after, be pressed into block electrode with oil press;
Two, five block type electrodes are welded into the strip electrode with the ion soldering group;
Three, the strip electrode is carried out 3 meltings in vacuum consumable electrode arc furnace, analyse through the alloy composition and detect acquisition finished product titanium alloy ingot;
Four, melted titanium alloy ingot removed the peel, decaptitated, rebasing, forge into blank at 1000 ℃;
Five, blank is rolled into bar or sheet material through 950 ℃ of forgings, 900 ℃.
Six, through detecting behind 860 ℃ of solution treatment, 500 ℃ of ageing treatment 16h, Rm is 1530MPa, and Rp0.2 is 1490MPa, and A (%) is 7, and Z (%) is 23.
In the invention process, laboratory worker is according to following weight per-cent: molybdenum 4～9%, niobium 3～6%, tantalum 1～5%, chromium 2～5%, zirconium 2～6%, aluminium 1～4%, surplus is that titanium is prepared burden, according to 950～1100 ℃ of forging blanks, blank is rolling through 900～1000 ℃ of forgings, 750～900 ℃, and carries out solid solution, timeliness thermal treatment, carry out the test of many times checking, all obtained good effect.
Claims (6)
1. a titanium alloy material is characterized in that: be made up of following weight per-cent, wherein, molybdenum 4～9%, niobium 3～6%, tantalum 1～5%, chromium 2～5%, zirconium 2～6%, aluminium 1～4%, surplus is titanium and unavoidable impurities, the weight percent of impurity, iron≤0.5%, carbon≤0.1%, nitrogen≤0.05%, hydrogen≤0.015%, oxygen≤0.05%.
2. the preparation method of the described titanium alloy material of claim 1 is characterized in that comprising the steps:
(a) according to following weight per-cent: molybdenum 4～9%, niobium 3～6%, tantalum 1～5%, chromium 2～5%, zirconium 2～6%, aluminium 1～4%, surplus is the titanium batching, behind abundant batch mixing, is pressed into block electrode;
(b) at least two block type electrodes are welded into the strip electrode with the ion soldering group;
(c) the strip electrode is carried out 2～3 meltings, cast titanium alloy pig in vacuum consumable electrode arc furnace;
(d) after the titanium alloy ingot finishing with step (c) preparation, under 950～1100 ℃ of conditions, forge into cylindric blank;
(e) blank is rolling through 900～1000 ℃ of forgings, 750～900 ℃ again, makes titanium alloy rod bar or sheet material;
(f) titanium alloy rod bar or sheet material are carried out the solid solution of β phase region, the thermal treatment of two-phase region timeliness.
3. according to the preparation method of the described titanium alloy material of claim 2, it is characterized in that: described titanium is a titanium sponge.
4. according to the preparation method of the described titanium alloy material of claim 2, it is characterized in that: described zirconium is a zirconium sponge.
5. according to the preparation method of the described titanium alloy material of claim 2, it is characterized in that: described aluminium is fine aluminium.
6. according to the preparation method of the described titanium alloy material of claim 2, it is characterized in that: described chromium is pure chromium.
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| CN102247117B (en) * | 2011-07-20 | 2013-01-23 | 宝鸡市三立有色金属有限责任公司 | Medical titanium alloy sight glass material and preparation method of sight glass |
| CN102965542A (en) * | 2012-12-14 | 2013-03-13 | 西北有色金属研究院 | Carbon-containing ultrahigh-strength titanium alloy |
| CN102965542B (en) * | 2012-12-14 | 2014-09-03 | 西北有色金属研究院 | Carbon-containing ultrahigh-strength titanium alloy |
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| CN106521236A (en) * | 2016-10-25 | 2017-03-22 | 南京工业大学 | Low-cost high-strength Fe-containing near-Beta titanium alloy and preparation method thereof |
| CN106521236B (en) * | 2016-10-25 | 2018-08-24 | 南京工业大学 | Nearly β type high-strength titanium alloys of a kind of low cost containing Fe and preparation method thereof |
| CN106702209A (en) * | 2016-12-19 | 2017-05-24 | 重庆旭穆科技有限公司 | Titanium alloy computer machine body material and preparation method thereof |
| CN107647787A (en) * | 2017-09-10 | 2018-02-02 | 李瑞卿 | A kind of preparation method of homogeneous heating antibacterial titanium pot |
| CN107625405A (en) * | 2017-09-10 | 2018-01-26 | 李瑞卿 | One kind is without oil smoke titanium pot |
| CN107747001A (en) * | 2017-10-24 | 2018-03-02 | 宝鸡市永盛泰钛业有限公司 | A kind of titanium alloy and preparation method thereof |
| CN108103354A (en) * | 2018-02-02 | 2018-06-01 | 贾红琴 | A kind of medical titanium alloy bone implant and preparation method thereof |
| CN111321318A (en) * | 2018-12-14 | 2020-06-23 | 上海纳微涂层有限公司 | Cavitation-resistant titanium alloy and preparation process thereof |
| CN111321318B (en) * | 2018-12-14 | 2022-02-18 | 上海纳微涂层有限公司 | Cavitation-resistant titanium alloy and preparation process thereof |
| CN110229976A (en) * | 2019-06-04 | 2019-09-13 | 北京科技大学 | A kind of yield strength is higher than the high-tenacity titanium alloy and preparation method of 900MPa |
| CN111906610A (en) * | 2020-08-14 | 2020-11-10 | 丽水学院 | Titanium alloy plate preparation process and processing equipment thereof |
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