CN109468491A - A kind of resistance to high strain rate impact high strength titanium alloy - Google Patents
A kind of resistance to high strain rate impact high strength titanium alloy Download PDFInfo
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- CN109468491A CN109468491A CN201811561809.6A CN201811561809A CN109468491A CN 109468491 A CN109468491 A CN 109468491A CN 201811561809 A CN201811561809 A CN 201811561809A CN 109468491 A CN109468491 A CN 109468491A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C14/00—Alloys based on titanium
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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Abstract
The invention discloses a kind of high strength titanium alloys of resistance to high speed impact, belong to titanium alloy technical field.Weight percentage of each component is Al:0~3%, Cr:4.1~5.5%, Fe:2~3% in the titanium alloy, and B:0~0.30%, surplus is titanium, and wherein Cr/Fe is 1.6~2.3, the K of the titanium alloyβValue range is 1.0~1.4, and for residual stress in 50~-200MPa, which has excellent impact resistance in the titanium alloy, and maximum uniformly moulding strain is greater than 0.25, and impact absorbing energy is greater than 300MJ/m3.Influence according to the pattern of the content of primary alpha phase and primary alpha phase to resistance to high-speed impact property improves the performance of the titanium alloy used under high speed impact state, facilitates the application field for expanding titanium alloy.
Description
Technical field
The invention belongs to titanium alloy technical fields, and in particular to a kind of resistance to high strain rate impact high strength titanium alloy.
Background technique
Beta-titanium alloy specific strength with higher and specific stiffness, and heavy in section titanium alloy component has excellent intensity
The advantages that toughness and fatigue behaviour, forging temperature is low, and cold forming capability is good, in Aeronautics and Astronautics, naval vessel, weapons and chemical work
The fields such as industry are widely used.Beta-titanium alloy is the β stabilizing element containing sufficient amount to inhibit alloy quenching to room temperature mistake
A kind of titanium alloy of martensitic traoformation occurs in journey.Common β stabilizing element has V, Mo, Nb, Zr, Sn, Fe, Cr, Pd and Ta
Deng wherein the cost of the alloy elements such as Mo, V, Pd, Ta, Nb, Zr, Sn is very high, keeps the material cost of beta-titanium alloy high.
The yield limit of titanium alloy and elastic limit ratio are larger, and yield tensile ratio is high, and resistance of deformation and deformation resilience amount are big, and plasticity is lower,
It is big to form difficulty, processing technology is complicated, therefore the manufacturing cost of titanium alloy is high, also affects titanium alloy and answers to more fields
With and promote.
There are two types of the approach for reducing titanium alloy manufacturing cost and use cost at present: one kind is by improving raw material (sponge
Titanium) production method come reduce the cost of raw material, using inexpensive alloy element；It is a kind of improve processing characteristics alloy set
Meter optimizes titanium alloy original structure, the various methods such as the processing technology for simplifying titanium alloy, the processing technology for optimizing titanium article.Its
The characteristics of middle element using inexpensive alloy is to use the Mo-Fe alloy cheap relative to Al-V alloy to reach as intermediate alloy
To the purpose for reducing the cost of raw material, however, Mo is still noble element, cost reduces limited；Using Fe, Al, Si, Cr, N, C
It can reach etc. resourceful element and titanium alloy cost is greatly lowered.Cr, Fe be eutectoid type beta stable element, Ti alloy,
There are eutectoid reactions in Ti-Al alloy, and compound phase may be generated when content is higher, cause brittleness, therefore select in alloying element
It selects and additional amount aspect should comprehensively consider.
Currently, the related patents in terms of inexpensive alloy element include:
Publication No. CN 101348876B is authorized, the invention of entitled " a kind of low cost high strength titanium alloy " is special
Benefit, technical solution are using Al-V or Fe-V intermediate alloy, electrolysis chromium, pure titanium or titanium alloy vehicle bits, iron and titanium sponge
By design ingredient mixing electrode pressing, alloy pig, the weight of alloying component are cast with conventional vacuum consumable electroarc furnace secondary smelting
Percentage composition are as follows: Al:4%-6%, V:1.9%-2.9%, Cr:1%-3%, Fe:1%-3%, surplus are Ti and can not keep away
The impurity exempted from.Tensile property after alloy heat treatment are as follows: tensile strength 1000MPa-1358MPa, yield strength 930MPa-
1270MPa, elongation percentage 9%-18%, contraction percentage of area 20%-50%.Alloy cost compared with T-6Al-4V reduces,
But still contain Al-V or Fe-V intermediate alloy in alloy, and the addition form of chromium and iron is electrolysis chromium and iron.
Authorization Publication No. CN101403058B, the patent of invention of entitled " a kind of low cost alpha and beta type titan alloy ",
Disclosed titanium alloy component percentage are as follows: Al:4.5-8%, Cr:0.3-3%, Fe:0.3-2%, remaining for Ti and
Inevitable impurity；Mo:0-3%, Sn:0-3% or Zr:0-3% can also be contained in alloy；Wherein Cr is with aluminium chromium hardener
Form be added, Fe is added in the form of ferro-aluminum intermediate alloy.It rolls to sampling, room temperature power on the alloy cold rolled sheet (0.8mm) edge
Learn performance are as follows: tensile strength 870-1000MPa, yield strength 780-900MPa, elongation 16-31%；0.8-2mm thickness Ti-
The room-temperature property of 6Al-4V plate is tensile strength 925MPa, yield strength 870MPa, elongation > 10%；Its room temperature mechanical property
It can be suitable with Ti-6Al-4V.
Publication No. CN1962913A is for another example authorized, entitled " a kind of low-cost titanium alloy of performance-adjustable "
Eight kinds of elements such as Al, Fe, Cr, Ni, S, B, C, Mo are added, wherein alloying component score meter by weight in patent of invention in titanium:
Al:0-3.5%, Fe:0.3-2.0%, Cr:0.1-0.5%, alloy mechanical property adjustable extent are as follows: tensile strength 350MPa-
1250MPa, elongation percentage 5%-30%, contraction percentage of area 10%-55%；But in alloy containing the higher W metal of price and
Mo improves the cost of alloy to a certain extent.
Titanium alloy frequently encounters in being widely applied field is greater than 10 in strain rate3The effect of High Loading Rate,
The organization type and textual details of titanium alloy material influence very big, different organization type and textual details on its dynamic property,
Different Dynamic performance and Adiabatic Shearing Sensitivity are corresponded under Dynamic Loading Condition.
Titanium alloy member in the fabrication process, will be by effect and influence from factors such as various techniques；When these because
After element disappears, if above-mentioned effect suffered by component cannot completely disappear therewith with influence, still there is partial action and influence
Remain in component, then this remaining effect is known as residual stress or residual stress with influence.It is remaining in various non-destructive determinations
Among the method for stress, X-ray diffraction method is acknowledged as most reliable and most practical.Its principle is mature, and method is perfect, at home
It is widely used in mechanical engineering and material science outside.
The inexpensive titanium alloy of resistance to high speed impact can be used in as structural material to the higher weapons of cost requirement and automobile
Equal fields.International titanium alloy shock resistance ess-strain song collected after being tested using Hopkinson pressure bar
Line is characterized, and the major parameter of characterization is maximum uniform plastic's strain and impact absorbing energy.Dynamic compressive test sample hair
It is maximum equal that stress, which does not change or change dependent variable corresponding to the stage for turning small with the increase of strain, in the case that life destroys
Even plastic strain.It is impact absorbing that maximum uniform plastic, which strains the integrated value of institute's envelope surface product under section, in dynamic stress-strain curve
Function.Ordinary circumstance its dynamic property can maximum uniformly moulding strain be greater than 0.25, impact absorbing energy is greater than 300MJ/m3Recognized
For with good impact resistance.
Summary of the invention
The present invention is directed to the deficiency of existing titanium alloy technology, provides a kind of high strength titanium alloy of resistance to high speed impact, the titanium
Weight percentage of each component is Al:0~3%, Cr:4.1~5.5%, Fe:2~3% in alloy, and B:0~0.30%, surplus is
Titanium, wherein Cr/Fe is 1.6~2.3, and the K β value range of the titanium alloy is that 1.0~1.4, K β calculation formula is as follows, K β=
C1/CK1+C2/CK2+C3/CK3+ ...+Cn/CKn, wherein Cn is weight percentage of the alloying element in alloy, and Ck is normal
With the critical weight percentage concentration of beta stable element, which is characterized in that in the titanium alloy residual stress in 50~-200MPa,
Titanium alloy has excellent impact resistance, and maximum uniformly moulding strain is greater than 0.25, and impact absorbing energy is greater than 300MJ/m3.
A kind of resistance to high speed impact high strength titanium alloy, which is characterized in that the high strength titanium of resistance to high speed impact closes
Gold is according to said ratio, using commercially available titanium sponge, pure Al, pure Cr, Cr-Fe intermediate alloy, Al-Ti-B intermediate alloy, compacting
Ti-Al-Cr-Fe-B system alloy cast ingot is made by secondary vacuum consumable electroarc furnace melting at consutrode；950 DEG C~
1100 DEG C of coggings, deflection 60%, by being repeatedly cooled to 750 DEG C~820 DEG C jumping-up pullings, cumulative deformation is greater than 70%,
The bar or plate of certain specification is made, and by bar obtained or plate 10 DEG C~60 DEG C, 1 hour below alloy phase change point
After air-cooled or furnace is cold, residual stress is obtained in 50~-200MPa, titanium alloy has excellent resistance to high-speed impact property.So
Afterwards, the dynamic property of Hopkinson pressure bar experiment measurement material is carried out.
A kind of resistance to high speed impact high strength titanium alloy, which is characterized in that the commercially available titanium sponge, pure Al, pure Cr
Purity be all larger than 98%.
Beneficial effects of the present invention: the influence according to the volume content of primary alpha phase to resistance to high-speed impact property, invention design
Meet the titanium alloy used under high speed impact state out；The titanium alloy has excellent impact resistance, maximum uniformly moulding strain
Greater than 0.25, impact absorbing energy is greater than 300MJ/m3.Influence according to the pattern of primary alpha phase to resistance to high-speed impact property determines
Residual-stress value improves the performance of the titanium alloy used under high speed impact state, facilitates the application field for expanding titanium alloy.
Specific embodiment
The present invention provides a kind of inexpensive high strength titanium alloys of resistance to high speed impact, combined with specific embodiments below to this hair
It is bright to be described further.
Embodiment 1
By commercially available 0 grade of titanium sponge, Al beans (purity be greater than 99%), pure Cr (purity is greater than 99%), Cr-Fe intermediate alloy,
Ingredient is carried out according to 1 composition proportion of table, consutrode is pressed into after mixing, by secondary vacuum consumable electroarc furnace melting, obtains
Ti-3.5Al-2.3Fe-4.5Cr alloy cast ingot, KβValue is 1.102.Alloy cast ingot is adopted in 1050 DEG C of coggings, deflection 60%
With multiple cooling commutation forging, final forging temperature is 800~850 DEG C, and the side of 900 × 75 × 35mm is made in cumulative deformation 80%
Stick；To material sampling is cut on square rod, 780 DEG C/0.5h/FC heat treatment is carried out, measures its residual stress in 50MPa.To its carry out
It is 0.28 that Hopkinson pressure bar experiment, which measures its maximum uniformly moulding strain, and impact absorbing energy is up to 310MJ/m3。
The composition proportion of alloy in 1 embodiment 1 of table
| Alloying element | Al | Fe | Cr | O | Ti |
| Alloy content (wt%) | 3 | 2.3 | 4.5 | 0.17 | Bal. |
Embodiment 2
By commercially available 0 grade of titanium sponge, Al beans (purity be greater than 99%), pure Cr (purity is greater than 99%), Cr-Fe intermediate alloy,
Ingredient is carried out according to 2 composition proportion of table, consutrode is pressed into after mixing, by secondary vacuum consumable electroarc furnace melting, obtains
Ti-3Al-2.5Fe-5.1Cr alloy cast ingot, KβValue is 1.228.Alloy cast ingot is used in 1050 DEG C of coggings, deflection 60%
Repeatedly cooling commutation forging, final forging temperature are 780~810 DEG C, cumulative deformation 75%, and φ is made after two-phase section rolls
The bar of 18mm.To material sampling is cut on stick, 700 DEG C/0.5h/FC heat treatment is carried out, measures its residual stress in -198MPa.
It carries out Hopkinson pressure bar experiment to it and measures its maximum uniformly moulding strain to be 0.25, impact absorbing energy is up to 300MJ/m3。
The formulated component of alloy in 2 embodiment 2 of table
| Alloying element | Al | Fe | Cr | O | Ti |
| Alloy content (wt%) | 3 | 2.5 | 5.1 | 0.12 | Bal. |
Embodiment 3
Commercially available 0 grade of titanium sponge, Al beans (purity is greater than 99%), pure Cr (purity is greater than 99%), Cr-Fe intermediate alloy are pressed
Ingredient is carried out according to 3 composition proportion of table, is pressed into consutrode after mixing, by a vacuum consumable electrode arc furnace melting and primary electricity
Beamlet melting obtains Ti-3Al-2Fe-4.51Cr alloy rectangle ingot, KβValue is 1.044.Alloy cast ingot is directly rolled at 1050 DEG C
Cogging processed, deflection 60%, using multiple cooling rolling, 700-830 DEG C of cumulative deformation of finishing temperature 85%, be made δ 30 ×
The plate of 300 × 1000mm.To cut on plate material sampling, carry out 845 DEG C/2h/FC heat treatment, measure its residual stress-
When 150MPa.It carries out Hopkinson pressure bar experiment to it and measures its maximum uniformly moulding strain to be 0.25, impact absorbing energy is reachable
305MJ/m3。
The formulated component of alloy in 3 embodiment 3 of table
| Alloying element | Al | Fe | Cr | O | Ti |
| Alloy content (wt%) | 3 | 2 | 4.51 | 0.15 | Bal. |
Embodiment 4
By commercially available 0 grade of titanium sponge, Al beans (purity is greater than 99%), pure Cr (purity is greater than 99%), Cr-Fe intermediate alloy, B
Powder carries out ingredient according to 1 composition proportion of table, is pressed into consutrode after mixing, by secondary vacuum consumable electroarc furnace melting, obtains
To Ti-3Al-3Fe-5.5Cr-0.3B alloy cast ingot, KβValue is 1.386.Alloy cast ingot is in 1050 DEG C of coggings, deflection
60%, using multiple cooling commutation forging, final forging temperature is 700~750 DEG C, cumulative deformation 90%, it is made 900 × 75 ×
The square rod of 25mm.To material sampling is cut on square rod, 700 DEG C/0.5h/FC heat treatment is carried out, measures its residual stress in -30MPa.
It carries out Hopkinson pressure bar experiment to it and measures its maximum uniformly moulding strain to be 0.27, impact absorbing energy is up to 300MJ/m3。
The formulated component of alloy in 4 embodiment 4 of table
| Alloying element | Al | Fe | Cr | B | O | Ti |
| Alloy content (wt%) | 3 | 3 | 5.5 | 0.3 | 0.1 | Bal. |
Embodiment 5
By commercially available 0 grade of titanium sponge, Al beans (purity is greater than 99%), pure Cr (purity is greater than 99%), Cr-Fe intermediate alloy, B
Powder carries out ingredient according to 1 composition proportion of table, is pressed into consutrode after mixing, by secondary vacuum consumable electroarc furnace melting, obtains
To Ti-3Al-2.3Fe-4.3Cr-0.1B alloy cast ingot, KβValue is 1.045.Alloy cast ingot is in 1050 DEG C of coggings, deflection
60%, using multiple cooling commutation forging, final forging temperature is 700~820 DEG C, cumulative deformation 90%, it is made 900 × 55 ×
The square rod of 35mm.To material sampling is cut on square rod, 840 DEG C/0.5h/FC heat treatment is carried out, measures its residual stress in 80MPa.
It carries out Hopkinson pressure bar experiment to it and measures its maximum uniformly moulding strain to be 0.29, impact absorbing energy is up to 310MJ/m3。
The formulated component of alloy in 5 embodiment 5 of table
| Alloying element | Al | Fe | Cr | B | O | Ti |
| Alloy content (wt%) | 3 | 2.3 | 4.3 | 0.1 | 0.18 | Bal. |
Technical solution of the present invention is described in detail in above-described embodiment.It is apparent that the present invention is not limited being retouched
The embodiment stated.Based on the embodiments of the present invention, those skilled in the art can also make a variety of variations accordingly, but appoint
What is equal with the present invention or similar variation shall fall within the protection scope of the present invention.
Claims (4)
1. a kind of high strength titanium alloy of resistance to high speed impact, weight percentage of each component is as follows in the titanium alloy:
Al:0~3%,
Cr:4.1~5.5%,
Fe:2~3%,
B:0~0.30%,
Surplus is titanium,
Wherein Cr/Fe is 1.6~2.3, the K of the titanium alloyβValue range is 1.0~1.4, KβCalculation formula is as follows,
Kβ=C1/CK1+C2/CK2+C3/CK3+…+Cn/CKn,
Wherein CnThe weight percentage for being alloying element in alloy, CkCritical weight percentage for common beta stable element is dense
Degree, which is characterized in that for residual stress in 50~-200MPa, titanium alloy has excellent impact resistance, most in the titanium alloy
Big uniformly moulding strain is greater than 0.25, and impact absorbing energy is greater than 300MJ/m3。
2. titanium alloy according to claim 1, which is characterized in that prepared by following steps:
1) commercially available titanium sponge, pure Al, pure Cr, Cr-Fe intermediate alloy, Al-Ti-B intermediate alloy are used, is pressed into from power consumption
Pole；
2) pass through the melting of secondary vacuum consumable electroarc furnace, alloy cast ingot is made；
3) in 950 DEG C~1100 DEG C coggings, deflection 60%；
4) by being repeatedly cooled to 750 DEG C~820 DEG C jumping-up pullings, cumulative deformation is greater than 70%, the stick of certain specification is made
Material or plate；
5) by step 4) gains 10 DEG C~60 DEG C below alloy phase change point, 1 hour air-cooled or furnace is cold is heat-treated, and obtains
Residual stress is obtained in 50~-200MPa, titanium alloy has excellent resistance to high-speed impact property.
3. titanium alloy according to claim 2, which is characterized in that the commercially available titanium sponge, pure Al, the purity of pure Cr are big
In 98%.
4. titanium alloy according to claim 2, which is characterized in that further include that step 6) carries out Hope to step 5) gains
The dynamic property of the gloomy compression bar measuring material of gold.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113637871A (en) * | 2021-07-09 | 2021-11-12 | 宝鸡安钛泽科技金属有限公司 | Method for manufacturing hot-forming titanium alloy for golf tool |
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| CN105400993A (en) * | 2015-12-22 | 2016-03-16 | 北京有色金属研究总院 | High-speed-impact-resistant and low-cost titanium alloy |
| CN105779818A (en) * | 2014-12-25 | 2016-07-20 | 北京有色金属研究总院 | High-strength high-toughness beta type titanium alloy and preparation method thereof |
| CN106756234A (en) * | 2016-12-27 | 2017-05-31 | 北京有色金属研究总院 | A kind of high strength titanium alloy of resistance to high speed impact |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131896A (en) * | 2011-12-01 | 2013-06-05 | 北京有色金属研究总院 | Low-cost beta-close titanium alloy |
| CN105779818A (en) * | 2014-12-25 | 2016-07-20 | 北京有色金属研究总院 | High-strength high-toughness beta type titanium alloy and preparation method thereof |
| CN105400993A (en) * | 2015-12-22 | 2016-03-16 | 北京有色金属研究总院 | High-speed-impact-resistant and low-cost titanium alloy |
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| CN113637871A (en) * | 2021-07-09 | 2021-11-12 | 宝鸡安钛泽科技金属有限公司 | Method for manufacturing hot-forming titanium alloy for golf tool |
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