CN106498231A - A kind of ocean engineering titanium alloy of yield strength higher than 1000MPa - Google Patents
A kind of ocean engineering titanium alloy of yield strength higher than 1000MPa Download PDFInfo
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- CN106498231A CN106498231A CN201611005010.XA CN201611005010A CN106498231A CN 106498231 A CN106498231 A CN 106498231A CN 201611005010 A CN201611005010 A CN 201611005010A CN 106498231 A CN106498231 A CN 106498231A
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- titanium alloy
- 1000mpa
- yield strength
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- 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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- 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
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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
Abstract
The invention discloses a kind of ocean engineering titanium alloy of yield strength higher than 1000MPa, by following mass percent into being grouped into：Al 4.4%～5.7%, Mo 4.0%～5.5%, V0.5%～1.5%, Cr 0.5%～1.5%, Fe 0.5%～1.5%, Nb 0.5%～1.8%, Zr 1.0%～2.5%, balance of Ti and inevitable impurity.Ocean engineering of the present invention titanium alloy tensile strength R at ambient temperaturem＞ 1200MPa, yield strength Rp0.2＞ 1000MPa, elongation percentage A ＞ 10%, contraction percentage of area Z ＞ 25%, intensity and plasticity good fitting；The titanic alloy machining plasticity is good, and its mechanical property is significantly higher than BT22 alloys, it is adaptable to the industrialized production of ocean engineering high-strength titanium alloy.
Description
Technical field
The invention belongs to high-strength titanium alloy technical field, and in particular to a kind of ocean work of yield strength higher than 1000MPa
Journey titanium alloy.
Background technology
Titanium alloy light weight, high-strength, anti-corrosion, special sea water resistance and sea atmosphere corrosion are excellent lightweight structural materials, quilt
Referred to as " marine metal ".At present, China applies the high-strength titanium alloy trade mark in ocean engineering to be mainly former Soviet Union's aeronautical material
A kind of high-strength titanium alloy that academy was succeeded in developing in 1974, the trade mark are BT22, and nominal composition is Ti-5A1-5Mo-5V-
1Cr-1Fe.Typically in 1000MPa or so, yield strength is generally below 1000MPa to its tensile strength at room temperature, it is difficult to full
The application demand of sufficient ocean engineering high-strength titanium alloy.Therefore, the ocean for developing a kind of yield strength higher than 1000MPa is needed badly
Engineering titanium alloy.
Content of the invention
The technical problem to be solved is for above-mentioned the deficiencies in the prior art, there is provided a kind of yield strength is high
Ocean engineering titanium alloy in 1000MPa.The working plasticity of the titanium alloy is good, its tensile strength R at room temperaturem＞
1200MPa, yield strength Rp0.2＞ 1000MPa, elongation percentage A ＞ 10%, contraction percentage of area Z ＞ 25%, intensity and plasticity excellent
Coupling, performance are significantly higher than BT22 alloys, it is adaptable to the industrialized production of ocean engineering high-strength titanium alloy.
For solving above-mentioned technical problem, the technical solution used in the present invention is：A kind of sea of yield strength higher than 1000MPa
Foreign engineering titanium alloy, it is characterised in that by following mass percent into being grouped into：Al 4.4%～5.7%, Mo 4.0%
～5.5%, V 0.5%～1.5%, Cr 0.5%～1.5%, Fe 0.5%～1.5%, Nb 0.5%～1.8%, Zr
1.0%～2.5%, balance of Ti and inevitable impurity.
Ocean engineering titanium alloy of the above-mentioned a kind of yield strength higher than 1000MPa, it is characterised in that by following quality
Percentage ratio into being grouped into：Al 5.0%, Mo 5.0%, V 1.0%, Cr 1.0%, Fe 1.0%, Nb 1.0%, Zr
2.0%, balance of Ti and inevitable impurity.
Ocean engineering titanium alloy of the above-mentioned a kind of yield strength higher than 1000MPa, it is characterised in that by following quality
Percentage ratio into being grouped into：Al 5.7%, Mo 5.0%, V 0.5%, Cr 1.5%, Fe 1.5%, Nb 0.5%, Zr
1.0%, balance of Ti and inevitable impurity.
Ocean engineering titanium alloy of the above-mentioned a kind of yield strength higher than 1000MPa, it is characterised in that by following quality
Percentage ratio into being grouped into：Al 5.5%, Mo 4.5%, V 1.5%, Cr 1.2%, Fe 1.0%, Nb 1.5%, Zr
2.5%, balance of Ti and inevitable impurity.
Ocean engineering titanium alloy of the above-mentioned a kind of yield strength higher than 1000MPa, it is characterised in that by following quality
Percentage ratio into being grouped into：Al 4.5%, Mo 5.0%, V 0.5%, Cr 1.0%, Fe 1.2%, Nb 1.0%, Zr
1.5%, balance of Ti and inevitable impurity.
Ocean engineering titanium alloy of the above-mentioned a kind of yield strength higher than 1000MPa, it is characterised in that by following quality
Percentage ratio into being grouped into：Al 5.4%, Mo 5.0%, V 1.0%, Cr 1.0%, Fe 0.8%, Nb 1.8%, Zr
2.5%, balance of Ti and inevitable impurity.
The preparation method of ocean engineering titanium alloy of the present invention is the customary preparation methods of titanium alloy, concrete preparation process
For：Aluminum vanadium intermediate alloy, aluminum molybdenum intermediate alloy, aluminum niobium intermediate alloy, aluminium shot, iron nail, electrolysis chromium, sponge zirconium are selected as needed
With titanium sponge by design composition mixing electrode pressing, titan alloy casting ingot, titanium alloy is obtained through three meltings of vacuum consumable electrode arc furnace
Ingot casting strips off the skin through surface and cuts after rising head, carries out cogging forging and many open die forging equipment such as hydrostatic forging machine or forging hammer was last
Fiery high temperature forging, further according to needing to carry out the heat processing techniques such as bar forging, plate rolling, rod silk, material rolling to make finished product,
Finished product obtains ocean engineering titanium alloy of the yield strength higher than 1000MPa after annealing.
The present invention has advantages below compared with prior art：
1st, the present invention reasonably controls Al constituent contents, and its mass percent is accurate to 0.1%.Accurate rational Al contains
Amount can prevent metastable β phase decompositions in titanium alloy from producing ω phases and producing fragility, while reducing vertical diameter and constant and bottom surface
The ratio of lattice paprmeter, increased the slip system of α phases, and the processing for improving titanium alloy is moulding.
2nd, due to two essential conditions of guarantee titanium alloy intensity：One is the solution strengthening of multicomponent alloy element；Two are
The supersaturated solid solution of complex alloys separates out the dispersion-strengtherning of highly dispersed precipitated phase.Therefore, except Ti in titanium alloy of the present invention
Host element outside, in titanium alloy, mainly use Al alloyings.Due to the proportion of Al elements, to compare titanium elements less, in Ti units
Add Al elements in element and can reduce the proportion of titanium alloy and effectively improve its specific strength, and the control of Al constituent contents exists in the alloy
When less than 7%, the intensity and plasticity of titanium alloy can be effectively improved.
2nd, the β isomorphism stable element Mo of better quality percentage composition is added in titanium alloy of the present invention, due to Mo elements
Diffusion velocity in titanium alloy is relatively slow, can play the effect of refined crystalline strengthening, and be difficult to form brittle intermetallic
Thing, so that titanium alloy intensity is greatly promoted.The interpolation of V, Cr, Fe, Nb element can produce larger lattice inside titanium alloy
Distortion, so as to thinning microstructure crystal grain, improves intensity and toughness, and the interpolation of Zr elements can strengthen the plasticity and weldability of titanium alloy
Energy.
3rd, room temperature tensile intensity R of titanium alloy of the present inventionm＞ 1200MPa, yield strength Rp0.2＞ 1000MPa, elongation percentage A
＞ 10%, contraction percentage of area Z ＞ 25%, intensity and plasticity good fitting.
4th, titanium alloy of the present invention can be processed into the finished products such as bar, sheet material, tubing, silk material, forging, it is adaptable to which ocean engineering is used
The industrialized production of high-strength titanium alloy, is with a wide range of applications.
Below by embodiment, technical scheme is described in further detail.
Specific embodiment
The present invention devises a kind of ocean engineering titanium alloy of yield strength higher than 1000MPa, and the titanium alloy is by following
Mass percent into being grouped into：Al 4.4～5.7%, Mo 4.0～5.5%, V 0.5～1.5%, Cr 0.5～1.5%,
Fe 0.5～1.5%, Nb 0.5～1.5%, Zr 1.5～2.5%, balance of Ti and inevitable impurity.The titanium alloy institute
The raw material being related to includes aluminum vanadium intermediate alloy, aluminum molybdenum intermediate alloy, aluminum niobium intermediate alloy, aluminium shot, iron nail, electrolysis chromium, sponge zirconium
With 0 grade of titanium sponge.Specifically preparation process is：Raw material is uniformly mixed after oil pressure in batch mixer by designed composition proportion
Electrode is pressed in machine, titan alloy casting ingot is obtained after three meltings of vacuum consumable electrode arc furnace, and alloy cast ingot strips off the skin through surface
And rising head is cut, through cogging and many fire time forgings on the flat-die forging equipment such as hydrostatic forging machine or forging hammer, enterprising in hot-rolling mill
Row rolling, finally annealing obtain ocean engineering high-strength titanium alloy.The cogging forging is carried out at 1050 DEG C～1100 DEG C, many
The forging temperature of fiery time is 1050 DEG C～1150 DEG C；The cogging forging and every fire time high temperature forging are three piers three and pull out, and become
Shape amount is 30%～50%；The rolling temperature is 850 DEG C～900 DEG C, and deflection is 50%～70%；At the annealing heat
Reason system is：850 DEG C～880 DEG C of temperature, solid solution 1h, air cooling；Most afterwards through 550 DEG C～600 DEG C timeliness 6h air coolings.Alloy finished product is passed through
Its room temperature tensile intensity R after annealing heat-treatsm＞ 1200MPa, yield strength Rp0.2＞ 1000MPa, elongation percentage A ＞ 10%, section
Shrinkage factor Z ＞ 25%.
Embodiment 1
Ocean engineering titanium alloy of the present embodiment yield strength higher than 1000MPa is by following mass percent into packet
Into：Al 5.0%, Mo 5.0%, V 1.0%, Cr 1.0%, Fe 1.0%, Nb 1.0%, Zr 2.0%, balance of Ti and not
Evitable impurity.
The present embodiment yield strength is higher than that the preparation method of the ocean engineering titanium alloy of 1000MPa is：By Al-83.5V
Alloy, Al-62.29Mo alloys, Al-72.1Nb alloys, aluminium shot, iron nail, electrolysis chromium, sponge zirconium and 0 grade of titanium sponge are by being designed to
After dividing mixing to be pressed into electrode, alloy pig is cast using vacuum consumable electrode arc furnace through three meltings, alloy cast ingot strips off the skin through surface
And after cutting rising head, cogging forging and the high warm forging of 3 fire time is carried out at 1050 DEG C to alloy cast ingot using hydrostatic forging machine
Make, the cogging forging temperature is 1050 DEG C；The high temperature forging temperature is 1150 DEG C.Then roll at 850 DEG C through milling train
Into with circular cross section, diameter of section for 20mm bar, then through 880 DEG C of solid solution 1h air coolings；Most empty through 550 DEG C of timeliness 6h afterwards
Cold, obtain titanium alloy finished product bar.
Room temperature tensile intensity R of the present embodiment ocean engineering after the annealed heat treatment of titanium alloy rod barm=1280MPa,
Yield strength Rp0.2=1150MPa, elongation percentage A=12%, contraction percentage of area Z=33%, intensity and plasticity good fitting.
Embodiment 2
Ocean engineering titanium alloy of the present embodiment yield strength higher than 1000MPa is by following mass percent into packet
Into：Al 5.7%, Mo 5%, V 0.5%, Cr 1.5%, Fe 1.5%, Nb 0.5%, Zr 1.0%, balance of Ti and can not
The impurity for avoiding.
The present embodiment yield strength is higher than that the preparation method of the ocean engineering titanium alloy of 1000MPa is：By Al-83.5V
Alloy, Al-62.29Mo alloys, Al-72.1Nb alloys, aluminium shot, iron nail, electrolysis chromium, sponge zirconium and 0 grade of titanium sponge are by being designed to
After dividing mixing to be pressed into electrode, alloy pig is cast using vacuum consumable electrode arc furnace through three meltings, alloy cast ingot strips off the skin through surface
And after cutting rising head, cogging forging and the high warm forging of 3 fire time is carried out at 1060 DEG C to alloy cast ingot using hydrostatic forging machine
Make, the cogging forging temperature is 1060 DEG C；The high temperature forging temperature is 1120 DEG C.Then roll at 860 DEG C through milling train
Into with circular cross section, diameter of section for 20mm bar, then through 870 DEG C of solid solution 1h air coolings；Most empty through 560 DEG C of timeliness 6h afterwards
Cold, obtain titanium alloy finished product bar.
Room temperature tensile intensity R of the present embodiment ocean engineering after the annealed heat treatment of titanium alloy rod barm=1300MPa,
Yield strength Rp0.2=1210MPa, elongation percentage A=10%, contraction percentage of area Z=30%, intensity and plasticity good fitting.
Embodiment 3
Ocean engineering titanium alloy of the present embodiment yield strength higher than 1000MPa is by following mass percent into packet
Into：Al 5.5%, Mo 4.5%, V 1.5%, Cr 1.2%, Fe 1.0%, Nb 1.5%, Zr 2.5%, balance of Ti and not
Evitable impurity.
The present embodiment yield strength is higher than that the preparation method of the ocean engineering titanium alloy of 1000MPa is：By Al-83.5V
Alloy, Al-62.29Mo alloys, Al-72.1Nb alloys, aluminium shot, iron nail, electrolysis chromium, sponge zirconium and 0 grade of titanium sponge are by being designed to
After dividing mixing to be pressed into electrode, alloy pig is cast using vacuum consumable electrode arc furnace through three meltings, alloy cast ingot strips off the skin through surface
And after cutting rising head, cogging forging and the high warm forging of 3 fire time is carried out at 1080 DEG C to alloy cast ingot using hydrostatic forging machine
Make, the cogging forging temperature is 1080 DEG C；The high temperature forging temperature is 1000 DEG C.Then roll at 870 DEG C through milling train
Into with circular cross section, diameter of section for 20mm bar, then through 860 DEG C of solid solution 1h air coolings；Most empty through 570 DEG C of timeliness 6h afterwards
Cold, obtain titanium alloy finished product bar.
Room temperature tensile intensity R of the present embodiment ocean engineering after the annealed heat treatment of titanium alloy rod barm=1250MPa,
Yield strength Rp0.2=1180MPa, elongation percentage A=12%, contraction percentage of area Z=34%, intensity and plasticity good fitting.
Embodiment 4
Ocean engineering titanium alloy of the present embodiment yield strength higher than 1000MPa is by following mass percent into packet
Into：Al 4.5%, Mo 5.0%, V 0.5%, Cr 1.0%, Fe 1.2%, Nb 1.0%, Zr 1.5%, balance of Ti and not
Evitable impurity.
The present embodiment yield strength is higher than that the preparation method of the ocean engineering titanium alloy of 1000MPa is：By Al-83.5V
Alloy, Al-62.29Mo alloys, Al-72.1Nb alloys, aluminium shot, iron nail, electrolysis chromium, sponge zirconium and 0 grade of titanium sponge are by being designed to
After dividing mixing to be pressed into electrode, alloy pig is cast using vacuum consumable electrode arc furnace through three meltings, alloy cast ingot strips off the skin through surface
And after cutting rising head, cogging forging and the high warm forging of 3 fire time is carried out at 1090 DEG C to alloy cast ingot using hydrostatic forging machine
Make, the cogging forging temperature is 1090 DEG C；The high temperature forging temperature is 1080 DEG C.Then roll at 880 DEG C through milling train
Into with circular cross section, diameter of section for 20mm bar, then through 860 DEG C of solid solution 1h air coolings；Most empty through 590 DEG C of timeliness 6h afterwards
Cold, obtain titanium alloy finished product bar.
Room temperature tensile intensity R of the present embodiment ocean engineering after the annealed heat treatment of titanium alloy rod barm=1320MPa,
Yield strength Rp0.2=1200MPa, elongation percentage A=11.0%, contraction percentage of area Z=33%, intensity and plasticity good fitting.
Embodiment 5
Ocean engineering titanium alloy of the present embodiment yield strength higher than 1000MPa is by following mass percent into packet
Into：Al 5.4%, Mo 5.0%, V 1.0%, Cr 1.0%, Fe 0.8%, Nb 1.8%, Zr 2.5%, balance of Ti and not
Evitable impurity.
The present embodiment yield strength is higher than that the preparation method of the ocean engineering titanium alloy of 1000MPa is：By Al-83.5V
Alloy, Al-62.29Mo alloys, Al-72.1Nb alloys, aluminium shot, iron nail, electrolysis chromium, sponge zirconium and 0 grade of titanium sponge are by being designed to
After dividing mixing to be pressed into electrode, alloy pig is cast using vacuum consumable electrode arc furnace through three meltings, alloy cast ingot strips off the skin through surface
And after cutting rising head, cogging forging and the high warm forging of 3 fire time is carried out at 1050 DEG C to alloy cast ingot using hydrostatic forging machine
Make, the cogging forging temperature is 1050 DEG C；The high temperature forging temperature is 1150 DEG C.Then roll at 900 DEG C through milling train
Into with circular cross section, diameter of section for 20mm bar, then through 850 DEG C of solid solution 1h air coolings；Most empty through 600 DEG C of timeliness 6h afterwards
Cold, obtain titanium alloy finished product bar.
Room temperature tensile intensity R of the present embodiment ocean engineering after the annealed heat treatment of titanium alloy rod barm=1250MPa,
Yield strength Rp0.2=1130MPa, elongation percentage A=12.5%, contraction percentage of area Z=35%, intensity and plasticity good fitting.
Embodiment 6
Ocean engineering titanium alloy of the present embodiment yield strength higher than 1000MPa is by following mass percent into packet
Into：Al 4.4%, Mo 4.0%, V 0.9%, Cr 0.5%, Fe 0.5%, Nb 1.2%, Zr 1.8%, balance of Ti and not
Evitable impurity.
The present embodiment yield strength is higher than that the preparation method of the ocean engineering titanium alloy of 1000MPa is：By Al-83.5V
Alloy, Al-62.29Mo alloys, Al-72.1Nb alloys, aluminium shot, iron nail, electrolysis chromium, sponge zirconium and 0 grade of titanium sponge are by being designed to
After dividing mixing to be pressed into electrode, alloy pig is cast using vacuum consumable electrode arc furnace through three meltings, alloy cast ingot strips off the skin through surface
And after cutting rising head, cogging forging and the high warm forging of 3 fire time is carried out at 1050 DEG C to alloy cast ingot using hydrostatic forging machine
Make, the cogging forging temperature is 1050 DEG C；The high temperature forging temperature is 1150 DEG C.Then roll at 900 DEG C through milling train
Into with circular cross section, diameter of section for 20mm bar, then through 850 DEG C of solid solution 1h air coolings；Most empty through 600 DEG C of timeliness 6h afterwards
Cold, obtain titanium alloy finished product bar.
Room temperature tensile intensity R of the present embodiment ocean engineering after the annealed heat treatment of titanium alloy rod barm=1230MPa,
Yield strength Rp0.2=1150MPa, elongation percentage A=12.0%, contraction percentage of area Z=34%, intensity and plasticity good fitting.
The above, near-sighted presently preferred embodiments of the present invention not does any restriction to the present invention, every according to the present invention
Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention
The protection domain of art scheme.
Claims (6)
1. a kind of yield strength is higher than the ocean engineering titanium alloy of 1000MPa, it is characterised in that by following mass percent
Into being grouped into：Al 4.4%～5.7%, Mo 4.0%～5.5%, V 0.5%～1.5%, Cr 0.5%～1.5%, Fe
0.5%～1.5%, Nb 0.5%～1.8%, Zr 1.0%～2.5%, balance of Ti and inevitable impurity.
2. the ocean engineering titanium alloy according to a kind of yield strength described in claim 1 higher than 1000MPa, its feature exists
In by following mass percent into being grouped into：Al 5.0%, Mo 5.0%, V 1.0%, Cr 1.0%, Fe 1.0%, Nb
1.0%, Zr 2.0%, balance of Ti and inevitable impurity.
3. the ocean engineering titanium alloy according to a kind of yield strength described in claim 1 higher than 1000MPa, its feature exists
In by following mass percent into being grouped into：Al 5.7%, Mo 5.0%, V 0.5%, Cr 1.5%, Fe 1.5%, Nb
0.5%, Zr 1.0%, balance of Ti and inevitable impurity.
4. the ocean engineering titanium alloy according to a kind of yield strength described in claim 1 higher than 1000MPa, its feature exists
In by following mass percent into being grouped into：Al 5.5%, Mo 4.5%, V 1.5%, Cr 1.2%, Fe 1.0%, Nb
1.5%, Zr 2.5%, balance of Ti and inevitable impurity.
5. the ocean engineering titanium alloy according to a kind of yield strength described in claim 1 higher than 1000MPa, its feature exists
In by following mass percent into being grouped into：Al 4.5%, Mo 5.0%, V 0.5%, Cr 1.0%, Fe 1.2%, Nb
1.0%, Zr 1.5%, balance of Ti and inevitable impurity.
6. the ocean engineering titanium alloy according to a kind of yield strength described in claim 1 higher than 1000MPa, its feature exists
In by following mass percent into being grouped into：Al 5.4%, Mo 5.0%, V 1.0%, Cr 1.0%, Fe 0.8%, Nb
1.8%, Zr 2.5%, balance of Ti and inevitable impurity.
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| CN110106395A (en) * | 2019-05-29 | 2019-08-09 | 西北有色金属研究院 | A kind of ocean engineering can weld titanium alloy with high-strength and high ductility |
| CN110951994A (en) * | 2019-12-23 | 2020-04-03 | 西部金属材料股份有限公司 | High-strength high-dynamic-tearing-energy titanium alloy and preparation method and application thereof |
| CN115927909A (en) * | 2022-11-28 | 2023-04-07 | 哈尔滨工业大学 | Method for regulating and controlling as-cast high-strength and high-toughness titanium alloy by using beta stable element |
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| CN115927909A (en) * | 2022-11-28 | 2023-04-07 | 哈尔滨工业大学 | Method for regulating and controlling as-cast high-strength and high-toughness titanium alloy by using beta stable element |
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| Publication number | Publication date |
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| CN106498231B (en) | 2018-07-10 |
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