CN106319286A - Low-cost titanium alloy and preparation method thereof - Google Patents
Low-cost titanium alloy and preparation method thereof Download PDFInfo
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- CN106319286A CN106319286A CN201610985168.1A CN201610985168A CN106319286A CN 106319286 A CN106319286 A CN 106319286A CN 201610985168 A CN201610985168 A CN 201610985168A CN 106319286 A CN106319286 A CN 106319286A
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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 low-cost titanium alloy and a preparation method thereof. In the titanium alloy, titanium is used as a main body element, and an alpha stable element B and a beta stable element Fe are used as alloy elements. The titanium alloy is composed of 0.5-5 wt.% of Fe, 0.05-0.2 wt.% of B, and the balance of titanium and inevitable impurities. The preparation method comprises the following steps: adding raw materials into an argon-introduced cold crucible levitation melting furnace according to the designed alloy component proportion, repeatedly melting to obtain a cast ingot, carrying out cogging forging on the cast ingot at the temperature of higher than the phase transformation point, sampling the forged alloy, carrying out heat treatment, and finally, carrying out structure and performance characterization. The titanium alloy provided by the invention has the advantages of uniform alloy components, fine structure, high tensile strength (up to 750-850 MPa), high elongation percentage (10-15%) and low cost, and can substitute partial high-price titanium alloys in some fields.
Description
Technical field
The application relates to a kind of low-cost titanium alloy and preparation method thereof, belongs to titanium materials technology field.
Background technology
Titanium or titanium alloy is because having low-density, high specific strength, high temperature resistant, corrosion-resistant, without the superiority such as magnetic, bio-compatible
Can, get a lot of applications in the field such as Aeronautics and Astronautics, naval vessel, but the high cost of titanium limits the application of titanium or titanium alloy
Scope, especially at civil area.In commercial titanium alloy, alloy element majority uses V, Mo, Nb, Zr, Sn and Ta etc. valuable at present
Metal, makes the cost of titanium alloy remain high, have impact on the range of titanium alloy.
The approach reducing titanium alloy cost at present has: reduce former material by the mode of production improving raw material (titanium sponge)
The various methods such as material cost, employing inexpensive alloy element, optimization titanic alloy machining technique, optimization titanium article process technology.As
Publication No. CN102828058A, the Chinese invention patent of invention entitled " preparation method of a kind of low-cost titanium alloy ", profit
Uniformly mixing with titanium powder with Mo-Fe intermediate alloy powder, compacting final vacuum sintering, wherein alloying component is in parts by weight:
Fe:1.5wt.%, Mo:2.5wt.%, improve plasticity and the fatigue behaviour of alloy, and tensile strength reaches more than 850MPa, prolongs
Rate of stretching is not less than 15%, and the contraction percentage of area is not less than 20%；But the price of Mo is the most expensive, therefore cost reduces limited, only
The resourceful cheap element such as Fe, Al, Si, Cr, C, O, N and B is had to can be only achieved the purpose that titanium alloy cost is greatly lowered.
Summary of the invention
An aspect according to the application, it is provided that a kind of low-cost titanium alloy, this titanium alloy uses Fe element and B element
As alloy element so that the cost of this titanium alloy substantially reduces, meanwhile, the tensile strength of this titanium alloy reach 750MPa～
850MPa, elongation percentage 10-15%, its combination property can meet the requirement of some engineering field.
To achieve these goals, the application adopts the following technical scheme that
A kind of low-cost titanium alloy, it is characterised in that described titanium alloy is with titanium as main element, with α stable element B and β
Stable element Fe is alloying element, and each component content of described titanium alloy is: Fe:0.5-5wt.%, B:0.05-0.2wt.%,
Surplus is titanium and inevitable impurity.
Preferably, each component content of described titanium alloy is: Fe:2-5wt.%, B:0.1-0.2wt.%, surplus be titanium and
Inevitably impurity.
Preferably, each component content of described titanium alloy is: Fe:3-4wt.%, B:0.1-0.15wt.%, and surplus is titanium
With inevitable impurity.
Preferably, the titanium in described titanium alloy is provided by titanium sponge, and boron is provided by Fe-B intermediate alloy, ferrum by Fe-B in the middle of
Alloy and ingot iron provide.
Preferably, in described low-cost titanium alloy, inevitable impurity includes O≤0.07wt.%, C≤0.03wt.%,
N≤0.01wt.%, Si≤0.02wt.%, H≤0.004wt.%, other impurity content all≤0.01wt.%.
Another aspect according to the application, it is provided that the preparation method of a kind of low-cost titanium alloy.
To achieve these goals, the application adopts the following technical scheme that
The preparation method of a kind of low-cost titanium alloy, it is characterised in that described method comprises the steps:
(1) required titanium sponge, Fe-B intermediate alloy and the amount of ingot iron are calculated by each component content of described titanium alloy,
And weigh according to result of calculation；
(2) water-cooled of cold crucible levitation melting stove put into by titanium sponge, Fe-B intermediate alloy and the ingot iron after weighing
Copper crucible carries out melting, obtains ingot casting；
(3) ingot casting of step (2) gained is made bar after the above 50-150 DEG C of cogging of transformation temperature is forged into；
(4) bar to step (3) gained carries out the sign of structure and performance after carrying out heat treatment after sampling.
Preferably, described step (2) specifically includes:
The water-cooled copper earthenware of cold crucible levitation melting stove put into by titanium sponge, Fe-B intermediate alloy and ingot iron after weighing
In crucible, after the body of heater evacuation to described cold crucible levitation melting stove, it is passed through high-purity argon gas, at high temperature carries out pill heat；Deng
After ingot casting is sufficiently cool, ingot casting turned upside down is put into water jacketed copper crucible carries out melting again, after 3-4 time be the most repeatedly
Only.
Preferably, described at high temperature carry out pill heat, refer to carry out 10-20min first when 1500-1800 DEG C
Melting, the temperature and time of melting is identical with pill heat again；At 1600 DEG C, preferably carry out the pill heat of 15min.
Preferably, in step (2), to being passed through high-purity argon gas after body of heater evacuation, described high-purity argon gas refers to that purity is
The argon of 99.999%, intake is 0.5-0.7 × 105Pa。
Preferably, the heat treatment described in step (4), empty after referring to bar is heated to 800-850 DEG C of insulation 0.5-2h
Cold, then carry out air cooling after 400-600 DEG C of insulation 0.5-2h；Preferably bar is heated to air cooling after 810-840 DEG C of insulation 1-1.5h,
Carry out air cooling after 500 DEG C of insulation 1h again.
The beneficial effect that the application can produce includes:
1) titanium alloy of a kind of low cost provided herein, each component content: Fe:0.5-5wt.%, B:0.05-
0.2wt.%, surplus is titanium and inevitable impurity；In low-cost titanium alloy, inevitable impurity content is: O≤
0.07wt.%, C≤0.03wt.%, N≤0.01wt.%, Si≤0.02wt.%, H≤0.004wt.%, other impurity elements
Content all≤0.01wt.%, total impurities content≤0.2wt.%.
Titanium alloy provided herein, alloying component is uniform, fine microstructures, tensile strength reach 750MPa～
850MPa, elongation percentage 10-15%, alloy has the advantage of low cost, can with Substitute For Partial price costly in some field
Titanium alloy.
In the application, Fe is as the beta stable element of titanium alloy, and its its cheap market price, Fe adds in beta-titanium alloy, permissible
Accelerate alloy aging response speed, reach aging strength peak value required time the shortest；When Fe content is too much, it is susceptible to segregation
Formed " β speckle "；And titanium adds B element can effectively refined cast structure crystal grain thinning during hindering following process
Grow up, thus reduce deformation fire time, reduce the purpose of cost.
2) preparation method of the titanium alloy of a kind of low cost provided herein, it is prepared raw material and uses titanium sponge, Fe-
B intermediate alloy, ingot iron；Intermediate alloy cost is as shown in table 1, and Fe-B intermediate alloy cost is less than the one-tenth of other intermediate alloys
This, the cost of Fe-B intermediate alloy is as shown in table 2.
Table 1. the most several intermediate alloy cost
Table 2.Fe-B intermediate alloy composition
Accompanying drawing explanation
Fig. 1 is the micro-structure diagram of the low-cost titanium alloy of embodiment 1 gained；
Fig. 2 is the micro-structure diagram of the low-cost titanium alloy of embodiment 2 gained；
Fig. 3 is the micro-structure diagram of the low-cost titanium alloy of embodiment 3 gained.
Detailed description of the invention
Below in conjunction with embodiment in detail the application is described in detail, but the application is not limited to these embodiments.
If no special instructions, the raw material in embodiments herein is all bought by commercial sources.
For making the purpose of the application, technical scheme and advantage of greater clarity, below in conjunction with detailed description of the invention, to this
Invention further describes.It should be understood that these describe the most exemplary, and it is not intended to limit the scope of the present invention.
Embodiment 1
1, the element ratio of the design of alloy of the application is as shown in table 3.
2, the titanium sponge of purchase, Fe-B intermediate alloy, ingot iron are carried out proportioning in the ratio of every ingot casting 1.5kg, then
Put in the water jacketed copper crucible of cold crucible levitation melting stove, to being passed through the argon that purity is 99.999% after body of heater evacuation, logical
Entering amount is 0.5 × 105The high-purity argon gas of Pa, carries out the alloy pill heat of 20min when 1500 DEG C.
3, after waiting that ingot casting is sufficiently cool, ingot casting turned upside down is put into and water jacketed copper crucible carries out melting again makes alloy
Homogenization of composition, the most repeatedly after 3-4 time till.
4, according to GB/T23605-2009 titanium alloy beta transition temperature assay method, the phase transition temperature preparing alloy is measured.
5, ingot casting makes bar after the above 50-150 DEG C of cogging of transformation temperature is forged into.
6, carry out air cooling after 840 DEG C of insulation 1h after bar being sampled, then carry out the heat treatment system of air cooling after 500 DEG C of insulation 1h
Degree.
7, alloy after heat treatment is carried out Microstructure characterization, see Fig. 1, and according to the requirement of GB GB/T228.1-2010
Carrying out Mechanics Performance Testing, performance is shown in Table 4.
The formulated component of alloy in table 3. embodiment 1
The mechanical property of bar in table 4. embodiment 1
Embodiment 2
(1) element ratio of the design of alloy of the application is as shown in table 5.
(2) titanium sponge of purchase, Fe-B intermediate alloy, ingot iron are carried out proportioning in the ratio of every ingot casting 1.5kg, then
Put in the water jacketed copper crucible of cold crucible levitation melting stove, to being passed through the argon that purity is 99.999% after body of heater evacuation, logical
Entering amount is 0.6 × 105The high-purity argon gas of Pa, carries out the alloy pill heat of 10min when 1800 DEG C.
(3), after waiting that ingot casting is sufficiently cool, ingot casting turned upside down is put into and water jacketed copper crucible carries out melting again makes conjunction
Gold homogenization of composition, the most repeatedly 3-4 time afterwards till.
(4) according to GB/T 23605-2009 titanium alloy beta transition temperature assay method, the phase transition temperature preparing alloy is measured.
(5) ingot casting makes bar after the above 50-150 DEG C of cogging of transformation temperature is forged into.
(6) carry out air cooling after 810 DEG C of insulation 1h after bar being sampled, then carry out the heat treatment of air cooling after 500 DEG C of insulation 1h
System.
(7) alloy after heat treatment is carried out Microstructure characterization, see Fig. 2, and wanting according to GB GB/T228.1-2010
Asking and carry out Mechanics Performance Testing, performance is shown in Table 6.
The formulated component of alloy in table 5. embodiment 2
The mechanical property of bar in table 6. embodiment 2
Embodiment 3
(1) element ratio of the design of alloy of the application is as shown in table 7.
(2) titanium sponge of purchase, Fe-B intermediate alloy, ingot iron are carried out proportioning in the ratio of every ingot casting 1.5kg, then
Put in the water jacketed copper crucible of cold crucible levitation melting stove, to being passed through the argon that purity is 99.999% after body of heater evacuation, logical
Entering amount is 0.5 × 105The high-purity argon gas of Pa, carries out the alloy pill heat of 15min when 1600 DEG C.
(3), after waiting that ingot casting is sufficiently cool, ingot casting turned upside down is put into and water jacketed copper crucible carries out melting again makes conjunction
Gold homogenization of composition, the most repeatedly 3-4 time afterwards till.
(4) according to GB/T 23605-2009 titanium alloy beta transition temperature assay method, the phase transition temperature preparing alloy is measured.
(5) ingot casting makes bar after the above 50-150 DEG C of cogging of transformation temperature is forged into.
(6) carry out air cooling after 810 DEG C of insulation 1h after bar being sampled, then carry out the heat treatment of air cooling after 500 DEG C of insulation 1h
System.
(7) alloy after heat treatment is carried out Microstructure characterization, see Fig. 3, and wanting according to GB GB/T228.1-2010
Asking and carry out Mechanics Performance Testing, performance is shown in Table 8.
The formulated component of alloy in table 7. embodiment 3
The mechanical property of bar in table 8. embodiment 3
The above, be only several embodiments of the application, the application not does any type of restriction, although this Shen
Please with preferred embodiment disclose as above, but and be not used to limit the application, any those skilled in the art, do not taking off
In the range of technical scheme, utilize the technology contents of the disclosure above to make a little variation or modification is all equal to
Effect case study on implementation, in the range of belonging to technical scheme.
Claims (10)
1. a low-cost titanium alloy, it is characterised in that described titanium alloy is with titanium as main element, steady with α stable element B and β
Determining element of Fe is alloying element, and each component content of described titanium alloy is: Fe:0.5-5wt.%, B:0.05-0.2wt.%, remaining
Amount is titanium and inevitable impurity.
Low-cost titanium alloy the most according to claim 1, it is characterised in that each component content of described titanium alloy is: Fe:
2-5wt.%, B:0.1-0.2wt.%, surplus is titanium and inevitable impurity.
Low-cost titanium alloy the most according to claim 2, it is characterised in that each component content of described titanium alloy is: Fe:
3-4wt.%, B:0.1-0.15wt.%, surplus is titanium and inevitable impurity.
4. according to the low-cost titanium alloy described in any one in claim 1-3, it is characterised in that the titanium in described titanium alloy
Being thered is provided by titanium sponge, boron is provided by Fe-B intermediate alloy, and ferrum is provided by Fe-B intermediate alloy and ingot iron.
5. according to the low-cost titanium alloy described in any one in claim 1-3, it is characterised in that described low-cost titanium alloy
In inevitably impurity include O≤0.07wt.%, C≤0.03wt.%, N≤0.01wt.%, Si≤0.02wt.%, H≤
0.004wt.%, other impurity content all≤0.01wt.%.
6. the preparation method of the low-cost titanium alloy as described in any one in claim 1-5, it is characterised in that described
Method comprises the steps:
(1) calculate required titanium sponge, Fe-B intermediate alloy and the amount of ingot iron by each component content of described titanium alloy, and press
Weigh according to result of calculation；
(2) the water-cooled copper earthenware of cold crucible levitation melting stove put into by titanium sponge, Fe-B intermediate alloy and the ingot iron after weighing
Crucible carries out melting, obtains ingot casting；
(3) ingot casting of step (2) gained is made bar after the above 50-150 DEG C of cogging of transformation temperature is forged into；
(4) bar to step (3) gained carries out the sign of structure and performance after carrying out heat treatment after sampling.
The preparation method of low-cost titanium alloy the most according to claim 6, it is characterised in that described step (2) is specifically wrapped
Include:
The water jacketed copper crucible of cold crucible levitation melting stove put into by titanium sponge, Fe-B intermediate alloy and ingot iron after weighing
In, it is passed through high-purity argon gas after the body of heater evacuation to described cold crucible levitation melting stove, at high temperature carries out pill heat；Wait
After ingot casting is sufficiently cool, ingot casting turned upside down is put into water jacketed copper crucible carries out melting again, after 3-4 time be the most repeatedly
Only.
The preparation method of low-cost titanium alloy the most according to claim 7, it is characterised in that described at high temperature carry out head
Secondary melting, refers to carry out the pill heat of 10-20min when 1500-1800 DEG C, again the temperature and time of melting with melt first
Refine identical；At 1600 DEG C, preferably carry out the pill heat of 15min.
9. according to the preparation method of the low-cost titanium alloy described in claim 6 or 7, it is characterised in that in step (2), to stove
Being passed through high-purity argon gas after body evacuation, described high-purity argon gas refers to the argon that purity is 99.999%, intake be 0.5-0.7 ×
105Pa。
10. according to the preparation method of the low-cost titanium alloy described in claim 6 or 7 or 8, it is characterised in that institute in step (4)
The heat treatment stated, refers to bar is heated to air cooling after 800-850 DEG C of insulation 0.5-2h, then carries out 400-600 DEG C of insulation 0.5-
Air cooling after 2h；Preferably bar is heated to air cooling after 810-840 DEG C of insulation 1-1.5h, then carries out air cooling after 500 DEG C of insulation 1h.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842095A (en) * | 2018-05-22 | 2018-11-20 | 南京工业大学 | High strength and low cost alpha+beta titanium alloys and preparation method thereof |
| CN109097628A (en) * | 2018-10-10 | 2018-12-28 | 广州宇智科技有限公司 | A kind of novel fire resistant titanium alloy that the 500-600 degree under non-oxidizing atmosphere uses |
| CN109732084A (en) * | 2019-03-21 | 2019-05-10 | 西京学院 | A kind of ferrotitanium molybdenum alloy and preparation method thereof |
| CN115522101A (en) * | 2022-09-19 | 2022-12-27 | 河北科技大学 | Fe-containing double-phase titanium-based alloy and preparation method thereof |
| CN115747569A (en) * | 2022-12-30 | 2023-03-07 | 昆明理工大学 | Novel Ti-Fe-B alloy and preparation method thereof |
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| US20060234800A1 (en) * | 2005-03-30 | 2006-10-19 | Honda Motor Co., Ltd. | Titanium alloy bolt and its manufacturing process |
| CN104831122A (en) * | 2015-05-19 | 2015-08-12 | 南京工业大学 | Low-cost and high-performance titanium alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060234800A1 (en) * | 2005-03-30 | 2006-10-19 | Honda Motor Co., Ltd. | Titanium alloy bolt and its manufacturing process |
| ES2286936B2 (en) * | 2005-03-30 | 2009-10-30 | Honda Motor Co., Ltd. | TITANIUM ALLOY BOLT AND PROCESS TO MANUFACTURE IT. |
| CN104831122A (en) * | 2015-05-19 | 2015-08-12 | 南京工业大学 | Low-cost and high-performance titanium alloy and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108842095A (en) * | 2018-05-22 | 2018-11-20 | 南京工业大学 | High strength and low cost alpha+beta titanium alloys and preparation method thereof |
| CN109097628A (en) * | 2018-10-10 | 2018-12-28 | 广州宇智科技有限公司 | A kind of novel fire resistant titanium alloy that the 500-600 degree under non-oxidizing atmosphere uses |
| CN109732084A (en) * | 2019-03-21 | 2019-05-10 | 西京学院 | A kind of ferrotitanium molybdenum alloy and preparation method thereof |
| CN109732084B (en) * | 2019-03-21 | 2021-05-11 | 西京学院 | Iron-titanium-molybdenum alloy and preparation method thereof |
| CN115522101A (en) * | 2022-09-19 | 2022-12-27 | 河北科技大学 | Fe-containing double-phase titanium-based alloy and preparation method thereof |
| CN115747569A (en) * | 2022-12-30 | 2023-03-07 | 昆明理工大学 | Novel Ti-Fe-B alloy and preparation method thereof |
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