CN108531774A - A kind of high-hardness titanium alloy and preparation method thereof - Google Patents
A kind of high-hardness titanium alloy and preparation method thereof Download PDFInfo
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- CN108531774A CN108531774A CN201810441954.4A CN201810441954A CN108531774A CN 108531774 A CN108531774 A CN 108531774A CN 201810441954 A CN201810441954 A CN 201810441954A CN 108531774 A CN108531774 A CN 108531774A
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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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- 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 belongs to technical field of alloy material, it is related to a kind of high-hardness titanium alloy and preparation method thereof.The high-hardness titanium alloy is in addition to mainly containing Ti, the also Al containing weight percent 6.0 8.0%, 0.5 2.5% Sn, 1.0 3.0% Zr, 2.0 4.0% Mo, 0.5 2.5% V, 0.5 3.0% Cr, 1.0 3.0% Nb and micro inevitable impurity.The preparation method includes the following steps：(1) it is suppressed after mixing raw material aluminium tin intermediate alloy, aluminium molybdenum intermediate alloy, aluminium vanadium intermediate alloy, aluminium niobium intermediate alloy, aluminium shot, electrolysis pure chromium, sponge zirconium, titanium sponge and obtains electrode, electrode melting is sequentially prepared alloy melting once ingot casting, alloy secondary smelting ingot casting, alloy melting ingot casting three times；(2) after ingot casting surface strips off the skin, riser is cut after completing x-ray inspection, cogging forging and more fire time high temperature forgings is carried out, handles to obtain high-hardness titanium alloy through solution treatment and multistage aging after rolling.The high-hardness titanium alloy of the present invention has both hardness that is good and matching, intensity and plasticity.
Description
Technical field
The invention belongs to technical field of alloy material, it is related to a kind of high-hardness titanium alloy and preparation method thereof.
Background technology
With the development of science and technology loss of weight and lightweight have become modern Aviation, space flight, weapons, chemical industry, automobile, medical treatment etc.
The important directions of field application material development, and wherein with lightweight, the high-strength titanium alloy for application characteristic by multiple states of the world
Family is classified as new structure metal material of the 21 century with strategic importance given priority to.
The existing research of titanium alloy material pays close attention to the raising of tensile strength mostly, while paying close attention to that meet can industrial applications
Plasticity, because high strength titanium alloy can further enhance the weight loss effect of titanium alloy.But high-hardness titanium alloy research is less,
Since direct proportion linear relationship is not present in the intensity and hardness of titanium alloy, the high intensity researched and developed with high intensity application background
Titanium alloy, such as TB2 (Ti-3Al-5Mo-5V-8Cr), Ti-15333 (Ti-3Al-3Sn-3Cr-15V), Timetal LCB (Ti-
6.8Mo-4.5Fe-1.5Al) and β-CEZ (Ti-4Mo-2Cr-1Fe-5Al), after solid solution aging technique is handled, although tension is strong
Degree can reach 1400MPa grades, but hardness HRC values are usually less than 45.Currently, the titanium alloy of commercial applications can be used
Hardness HRC values are generally in the range of 30-45, this cannot meet when industrial titanium alloy makes cutter, gear, and (HRC values are more than high rigidity
50) demand, therefore strongly limit application of the titanium alloy under high rigidity Service Environment.
Chinese patent application 201210377502.7 discloses a kind of titanium alloy and preparation method for making cutter,
Disclosed titanium alloy nominal composition is Ti-3Al-4V-5Cr-2Fe-7Mo-1W-1Zr-0.2O-0.2Si.The titanium alloy is through solid solution
After multistage aging, HRC values are 19.35g/cm up to 55 or more, W element density3, about 3410 DEG C of fusing point, Al element density is
2.7g/cm3, about 660 DEG C of fusing point.But containing high density, high-melting-point element W in the titanium alloy, during vacuum consumable smelting
There are problems that alloying element homogenization；And under same melting current condition, it is difficult to ensure that the Al elements of low-density low melting point
Not excessive loss, while the dystectic W elements of high density can melt, different densities alloy can even solidification, do not generate partially
Analyse phenomenon.
International Patent Application PCT/US2007/012293 disclose it is a kind of preparing high intensity, high rigidity and high tenacity titanium close
The method of gold, adds boron in titanium alloy, and the boron content in boron modification titanium alloy is limited no more than eutectic.The titanium
Alloy is selected from Ti-6Al-4V, Ti-5Al-2.5Sn and Ti-6Al-2Sn-4Zr-2Mo-0.1Si, and the Adding Way of boron is：Liquid
Or powdered boron is added into the titanium alloy of melting, and melt is atomized to obtain boracic titanium alloy powder, boracic titanium alloy
Powder passes through hot isostatic pressing, forging, extrusion or roll forming.But preparation method manufacturing cost disclosed in this application is high, and process is multiple
It is miscellaneous, it is not suitable with industrialized production.
In summary the Development Status of high-hardness titanium alloy applies need to meet titanium alloy under high rigidity Service Environment
Ask, there is an urgent need for develop one kind can industrialized production, hardness HRC values reach 50, and matched high hard with good intensity and plasticity
Spend titanium alloy.The development of such high-hardness titanium alloy can expand application of the titanium alloy in cutter loss of weight field, to generate compared with
Big economic value.
Invention content
The primary and foremost purpose of the present invention is to provide a kind of high-hardness titanium alloy, to have both hardness that is good and matching, strong
Degree and plasticity.
In order to achieve this, in the embodiment on basis, the present invention provides a kind of high-hardness titanium alloy, and the height is hard
Titanium alloy is spent in addition to mainly containing Ti, the also Al containing weight percent 6.0-8.0%, the Sn of 0.5-2.5%, 1.0-3.0%
Zr, the Nb of the Cr of the V of the Mo of 2.0-4.0%, 0.5-2.5%, 0.5-3.0%, 1.0-3.0% and micro can not keep away
The impurity exempted from.
Addition α stable elements Al and neutral element Sn, Zr in the titanium alloy of the present invention, wherein the solution strengthening effect of Al elements
Fruit is most notable.After Al element weight percent contents reach 3-5%, the Al for often adding 1% weight percent can improve tension
Intensity 50MPa~70MPa.Sn and Zr is added as the supplement hardening agent of multicomponent alloy, wherein Sn element weight percents content
Generally strengthen significant effect in 0.5-2.5%, alloy plasticity slowly declines with the increase of Sn elements and Zr elements.Sn and Zr members
The addition of element contributes to alloy to obtain preferable intensity and plasticity matching.
Be added since β phases have higher intensity and hardness, in titanium alloy of the invention isomorphism beta stable element Mo, V and
Nb and eutectoid type beta stable element Cr, this plays solution strengthening effect to β phases.Mo, V and Nb belong to β isomorphous elements, do not occur altogether
Analysis reaction, ensure that the structure stability of alloy at high temperature.Moreover, the addition of Mo elements and V element, significantly reduces alloy
Transformation temperature increases the quenching degree of alloy.Diffusion velocity of the Mo elements in titanium alloy is slow, plays and is precipitated in refinement titanium alloy
The effect of phase size, to enhance heat treatment reinforcement effect；Mo elements can inhibit the hair of eutectoid reaction in Ti-Cr systems
It is raw, to play the role of that brittle metal chemical combination object is prevented to generate.Nb elements can improve the antioxygenic property of titanium alloy.Cr members
The stable β phase abilities of element are strong, are the main additives of high strength and high hardness titanium alloy, and Cr is nonactive eutectoid element, generally raw
Under production and heat treatment condition, eutectoid reaction does not occur.
In a preferred embodiment, the present invention provides a kind of high-hardness titanium alloy, wherein described is inevitable
Impurity in the content of Fe be less than 0.3%, the C and O single-element content of titanium alloy total weight and be less than titanium alloy total weight
0.1%, the content of H element is less than the 0.001% of titanium alloy total weight, and the content of N element is less than titanium alloy total weight
0.05%, the content summation of other impurities element is less than the 0.1% of titanium alloy total weight.
Impurity element H and C limited dissolving and has eutectic and eutectoid reaction in α titaniums and β titaniums.Between H is formed in titanium alloy
Gap type solid solution, belongs to absolute objectionable impurities, it can cause the hydrogen embrittlement of titanium alloy.Hydrogen embrittlement cause titanium alloy it is unexpected,
Seemingly spontaneous fracture brings high risks to the use of titanium alloy, therefore, strictly to control the content of H in titanium alloy, this hair
Bright middle H content is less than 0.001%.C element belongs to objectionable impurities in titanium alloy, when C content reach 0.2% and its it is above when,
It is easy to form adamantine carbide, carbide significantly reduces the plasticity and impact flexibility of alloy.C element is controlled in the present invention
Content is less than 0.1%.
Impurity element O and N has simple metatectic transformation in α titaniums and β titaniums.O elements are in most cases objectionable impurities, are drawn
Play the brittleness of titanium.O content is controlled in the present invention is less than 0.1%.N is objectionable impurities, it significantly reduces plasticity, therefore in commercial titanium
In titanium alloy, content need to be strict controlled in 0.04%-0.05%.
B element does not almost dissolve in solid-state titanium, is generally not used for the alloying of titanium alloy, micro B (0.03-0.05%)
The big crystal grain that titanium or titanium alloy can be refined can get certain practical applications as alterant.B element is added in titanium alloy, is easy
TiB brittlement phases are formed, drastically reducing for titanium alloy plasticity is caused.Lower plasticity can be such that titanium alloy is easy in use
Brittle failure occurs.In a preferred embodiment, the present invention provides a kind of high-hardness titanium alloy, wherein the high rigidity titanium
Alloy is in addition to mainly containing Ti, the also Al containing weight percent 6.0%, 2.5% Sn, 3.0% Zr, 2.0% Mo,
0.5% V, 0.5% Cr, 1.0% Nb and micro inevitable impurity.
In a preferred embodiment, the present invention provides a kind of high-hardness titanium alloy, wherein the high rigidity titanium
Alloy is in addition to mainly containing Ti, the also Al containing weight percent 6.5%, 2.0% Sn, 2.5% Zr, 2.5% Mo,
1.5% V, 2.0% Cr, 2.0% Nb and micro inevitable impurity.
In a preferred embodiment, the present invention provides a kind of high-hardness titanium alloy, wherein the high rigidity titanium
Alloy is in addition to mainly containing Ti, the also Al containing weight percent 7.0%, 2.0% Sn, 2.0% Zr, 3.0% Mo,
2.0% V, 2.0% Cr, 3.0% Nb and micro inevitable impurity.
In a preferred embodiment, the present invention provides a kind of high-hardness titanium alloy, wherein the high rigidity titanium
Alloy is in addition to mainly containing Ti, the also Al containing weight percent 7.0%, 1.5% Sn, 2.5% Zr, 3.5% Mo,
2.0% V, 2.0% Cr, 1.0% Nb and micro inevitable impurity.
In a preferred embodiment, the present invention provides a kind of high-hardness titanium alloy, wherein the high rigidity titanium
Alloy is in addition to mainly containing Ti, the also Al containing weight percent 7.5%, 1.0% Sn, 2.0% Zr, 3.5% Mo,
2.5% V, 2.5% Cr, 1.5% Nb and micro inevitable impurity.
In a preferred embodiment, the present invention provides a kind of high-hardness titanium alloy, wherein the high rigidity titanium
Alloy is in addition to mainly containing Ti, the also Al containing weight percent 8.0%, 0.5% Sn, 1.0% Zr, 4.0% Mo,
2.5% V, 3.0% Cr, 2.0% Nb and micro inevitable impurity.
Second object of the present invention is to provide the preparation method of high-hardness titanium alloy as described above, can preferably make
The standby titanium alloy for having both hardness that is good and matching, intensity and plasticity.
In order to achieve this, in the embodiment on basis, the present invention provides the preparation of high-hardness titanium alloy as described above
Method, the preparation method include the following steps：
(1) by raw material aluminium tin intermediate alloy, aluminium molybdenum intermediate alloy, aluminium vanadium intermediate alloy, aluminium niobium intermediate alloy, aluminium shot,
Compacting obtains electrode after electrolysis pure chromium, sponge zirconium, titanium sponge mixing, and electrode melting is sequentially prepared alloy melting once ingot casting, closes
Golden secondary smelting ingot casting, alloy melting ingot casting three times；
(2) after ingot casting surface strips off the skin, riser is cut after completing x-ray inspection, carries out cogging forging and more fire time high temperature forgings,
It handles to obtain high-hardness titanium alloy through solution treatment and multistage aging after rolling.
The preparation method of the high-hardness titanium alloy of the present invention obtains ingot casting using vacuum consumable electrode arc furnace melting three times；To casting
Ingot carries out chemical composition analysis, after confirming that ingredient is uniform, carries out more fire time forgings, forges alloying ingot internal flaw, obtain fully thin
Change, uniform as-cast structure；Rolling and heat treatment process are carried out to casting, it is hard to obtain even tissue, height of good performance
Spend high-strength high-plasticity titanium alloy.
50.5≤HRC of titanium alloy (Rockwell hardness)≤55, the 1483MPa being prepared using the preparation method of the present invention≤
Rm (tensile strength)≤1871MPa, 1429MPa≤Rp0.2(yield strength)≤1682MPa, 5.5%≤elongation after fracture A≤
12%.
In a preferred embodiment, the present invention provides the preparation method of high-hardness titanium alloy as described above, wherein
In step (2), the cogging forging temperature is 1100-1150 DEG C, soaking time 240-300 minutes；More fire time are high
Warm forging temperature is 900-960 DEG C, soaking time 120-180 minutes.
In a preferred embodiment, the present invention provides the preparation method of high-hardness titanium alloy as described above, wherein
In step (2), the temperature of the rolling is 850-950 DEG C, soaking time 120-180 minutes；The total deformation of the rolling
Amount is 50-70%.
In a preferred embodiment, the present invention provides the preparation method of high-hardness titanium alloy as described above, wherein
In step (2), the temperature of the solution treatment is 780 DEG C to (Tβ- 30 DEG C), soaking time 0.5-2h；The solid solution
The type of cooling of processing is air-cooled or water cooling.
In a preferred embodiment, the present invention provides the preparation method of high-hardness titanium alloy as described above, wherein
In step (2), the aging temp of multistage aging processing is 350-600 DEG C, and timeliness soaking time is 2-24h.
The beneficial effects of the present invention are, high-hardness titanium alloys of the invention to have both hardness that is good and matching, strong
Degree and plasticity.And the preparation method of the high-hardness titanium alloy of the present invention is utilized, it can preferably prepare and have both good and phase
The titanium alloy of hardness, intensity and the plasticity matched.
For the titanium alloy of the present invention under the premise of intensity and plasticity have good fitting, Rockwell hardness reaches 55, conduct
It is about 7.8g/cm compared to density when alternative materials under high rigidity Service Environment3Homogeneous steel, loss of weight is up to 40%.The present invention
Titanium alloy can be used for making the various components for needing high rigidity, such as cutter, gear and friction member.
The titanium alloy beta stable element content of the present invention is less, when all equal cappings of beta stable element weight percent content
When (Mo 4.0%, V 2.5%, Cr 3.0%, Nb are 3.0% when), Tai He Jin Molybdenum equivalents are 11.39.According to Russia
Classification to titanium alloy, titanium alloy is the transiens between two facies pattern of alpha+beta and nearly β types at this time.Therefore, titanium of the invention closes
Gold utensil has good thermal stability, and long-time (being more than 3000h), operating temperature was up to 400 DEG C.In addition, the titanium alloy tool of the present invention
There are good welding performance, welded joint coefficient 0.85；And due to the addition of appropriate beta stable element, the pressure of titanium alloy adds
Work has a distinct increment, and good cold and hot working performance helps to improve the yield rate of titanium alloy, and commutation reduces the manufacture of component
Cost.
In addition, addition beta stable element amount is less in the titanium alloy of the present invention, compared to addition high-content beta stable element
Near β titanium alloy or metastable beta titanium alloy, manufacturing cost significantly reduce.
Specific implementation mode
The specific implementation mode of the present invention is further illustrated with reference to embodiments.Titanium alloy in each embodiment
Preparation method be summarized as follows.
Raw material involved by preparation method include aluminium tin intermediate alloy, aluminium molybdenum intermediate alloy, aluminium vanadium intermediate alloy, aluminium niobium
Intermediate alloy, aluminium shot, electrolysis pure chromium, sponge zirconium and 0 grade of titanium sponge.Specifically preparation process is：
(1) compacting obtains electrode after mixing raw material by design ingredient, and electrode is prepared through vacuum consumable electrode arc furnace melting
Alloy melting once ingot casting subsequently carries out secondary smelting and melting three times to an ingot again, completes the melting of alloy.
(2) after ingot casting surface strips off the skin, riser is cut after completing x-ray inspection, is opened on hydrostatic forging machine or quick forging machine
Base forges and more fire time high temperature forgings, is then rolled on hot-rolling mill, then after solution treatment and multistage aging processing
To high-hardness titanium alloy plank.Wherein cogging forging temperature is 1100-1150 DEG C, soaking time 240 minutes or more；More fire time forgings
It is 900-960 DEG C to make temperature, soaking time 110 minutes or more, and it is 30-50% that the piers of more fire time forgings, which pull out deflection,；Rolling
Temperature is 850-950 DEG C, soaking time 110 minutes or more, and the total deformation of rolling is 50-70%；Solution treatment at 780 DEG C extremely
(Tβ- 30 DEG C) carry out (TβFor alloy alpha+beta → beta transus temperature), soaking time 0.5-2h, the type of cooling is air-cooled or water cooling；It is more
The aging temp of grade ageing treatment is 350-600 DEG C, and timeliness soaking time is 2-24h.
In following embodiments, aging strengthening model is all made of the mode that sample heats up with stove, i.e., will before aging furnace heating
Sample is put into aging furnace, and sample and aging furnace heat up together.Such as without special mark, aging furnace heating rate is 0.25 DEG C/s.
Examination criteria to sample room-temperature mechanical property (including tensile strength, yield strength, elongation after fracture and contraction percentage of area) is
GB/T228.1-2010, the testing standard to sample Rockwell hardness are GB/T230.1-2009.
In addition, titanium alloy material prepared by following each embodiments is after testing, the content of Fe is less than titanium alloy total weight
0.3%, C and O single-element contents are less than the 0.1% of titanium alloy total weight, and the content of H element is less than titanium alloy total weight
0.001%, the content of N element is less than the 0.05% of titanium alloy total weight, and the content summation of other impurities element is less than titanium alloy
The 0.1% of total weight.
Embodiment 1：The preparation and detection (one) of titanium alloy material
Titanium alloy component proportioning manufactured in the present embodiment is Ti-6Al-2.5Sn-3Zr-2Mo-0.5V-0.5Cr-1Nb (6Al
Indicate the Al of weight percent content 6%, similar below to state similarly), the titanium alloy equivalent thickness of aluminium is that 8.13 , Molybdenum equivalents are 3.49.
Titanium alloy prepares raw material and is Al-Sn50, Al-Mo80, Al-V60, Al-Nb62, is electrolysed chromium, aluminium shot, sponge zirconium and 0 grade of sponge
Titanium.
Specifically preparation process is：
(1) compacting obtains electrode after mixing raw material by design ingredient, is cast through vacuum consumable electrode arc furnace melting three times
Ingot；
(2) alloy is using three fiery forging technologies, cogging forging：1150 DEG C, deflection 50%；Two fire forgings：960 DEG C, deflection
50%；Three fire forgings：940 DEG C, deflection 50%；
(3) rolling mill practice：Rolling temperature is 950 DEG C, and total deformation 70% rolls to obtain 10mm heavy-gauge sheetings.
Orthogonal heat treatment experiment is carried out to sheet alloy, more preferably heat treatment process is 960 DEG C/1h, AC+350 DEG C/
1h ,+560 DEG C/8h, AC.
Thus the Rockwell hardness HRC values (under heat treatment process as above) are 50.5 to the titanium alloy being prepared after testing, room
Warm tensile strength RmFor 1483MPa, yield strength Rp0.2For 1429MPa, elongation after fracture A is 12%, and contraction percentage of area Z is
43%.Alpha+beta → beta transformation point temperature is 990 DEG C ± 5 DEG C.
Embodiment 2：The preparation and detection (two) of titanium alloy material
Titanium alloy component proportioning manufactured in the present embodiment is Ti-6.5Al-2Sn-2.5Zr-2.5Mo-1.5V-2Cr-2Nb,
The titanium alloy equivalent thickness of aluminium is that 8.38 , Molybdenum equivalents are 7.52.It is Al-Sn50, Al-Mo80, Al-V60, Al- that titanium alloy, which prepares raw material,
Nb62, electrolysis chromium, aluminium shot, sponge zirconium and 0 grade of titanium sponge.
Specifically preparation process is：
(1) compacting obtains electrode after mixing raw material by design ingredient, is cast through vacuum consumable electrode arc furnace melting three times
Ingot；
(2) alloy is using three fiery forging technologies, cogging forging：1100 DEG C, deflection 50%；Two fire forgings：920 DEG C, deflection
50%；Three fire forgings：900 DEG C, deflection 50%；
(3) rolling mill practice：Rolling temperature is 910 DEG C, and total deformation 70% rolls to obtain 10mm heavy-gauge sheetings.
Thus room-temperature mechanical property of the titanium alloy plate being prepared under different heat treatment technique is as shown in table 1 below.
Room-temperature mechanical property of 1 titanium alloy plate of table under different heat treatment technique
Note：Using heating up with stove, the heating rate of aging furnace is for 2#-61 samples, 2#-71 samples and 2#-81 sample timeliness
0.25℃/s；2#-62 samples, 2#-72 samples and 2#-82 samples timeliness are equally used and are heated up with stove, the heating rate of aging furnace
For 20 DEG C/s；After other samples reach default aging temp for aging furnace, then sample is put into burner hearth and carries out timeliness.
When the heat treatment process of Ti-6.5Al-2Sn-2.5Zr-2.5Mo-2.5V-2Cr-2Nb alloys is 900 DEG C/1h/AC+
350 DEG C/1h+560 DEG C/8h, wherein aging samples when the heating rate of aging furnace is 0.25 DEG C/s DEG C, are passed through using heating up with stove
Detection, Rockwell hardness HRC values are 52, room temperature tensile intensity RmFor 1630MPa, yield strength Rp0.2For 1580MPa, extension of having no progeny
Rate A is 10%, and alpha+beta → beta transformation point temperature is 955 DEG C ± 5 DEG C.
Embodiment 3：The preparation and detection (three) of titanium alloy material
Titanium alloy component proportioning manufactured in the present embodiment is Ti-7Al-2Sn-2Zr-3Mo-2V-2Cr-3Nb, titanium alloy aluminium
Equivalent is that 8.8 , Molybdenum equivalents are 8.67.It is Al-Sn50, Al-Mo80, Al-V60, Al-Nb62, electrolysis that titanium alloy, which prepares raw material,
Chromium, aluminium shot, sponge zirconium and 0 grade of titanium sponge.
Specifically preparation process is：
(1) compacting obtains electrode after mixing raw material by design ingredient, is cast through vacuum consumable electrode arc furnace melting three times
Ingot；
(2) alloy is using three fiery forging technologies, cogging forging：1150 DEG C, deflection 50%；Two fire forgings：940 DEG C, deflection
50%；Three fire forgings：920 DEG C, deflection 50%；
(3) rolling mill practice：Rolling temperature is 930 DEG C, and total deformation 70% rolls to obtain 10mm heavy-gauge sheetings.
Orthogonal heat treatment experiment is carried out to sheet alloy, more preferably heat treatment process is 930 DEG C/1h, AC+350 DEG C/
1h ,+520 DEG C/8h, AC.
Thus the Rockwell hardness HRC values (under heat treatment process as above) are 52 to the titanium alloy being prepared after testing, room temperature
Tensile strength RmFor 1650MPa, yield strength Rp0.2For 1537MPa, elongation after fracture A is 9%, and alpha+beta → beta transformation point temperature is
970℃±5℃。
Embodiment 4：The preparation and detection (four) of titanium alloy material
Titanium alloy component proportioning manufactured in the present embodiment is Ti-7Al-1.5Sn-2.5Zr-3.5Mo-2V-2Cr-1Nb, titanium
The alloy equivalent thickness of aluminium is that 8.72, Molybdenum equivalents are 8.57.It is Al-Sn50, Al-Mo80, Al-V60, Al- that titanium alloy, which prepares raw material,
Nb62, electrolysis chromium, aluminium shot, sponge zirconium and 0 grade of titanium sponge.
Specifically preparation process is：
(1) compacting obtains electrode after mixing raw material by design ingredient, is cast through vacuum consumable electrode arc furnace melting three times
Ingot；
(2) alloy is using three fiery forging technologies, cogging forging：1150 DEG C, deflection 50%；Two fire forgings：940 DEG C, deflection
50%；Three fire forgings：920 DEG C, deflection 50%；
(3) rolling mill practice：Rolling temperature is 930 DEG C, and total deformation 70% rolls to obtain 10mm heavy-gauge sheetings.
Orthogonal heat treatment experiment is carried out to sheet alloy, more preferably heat treatment process is 910 DEG C/1h, AC+350 DEG C/
1h ,+460 DEG C/1h+540 DEG C/6h, AC.
Thus the Rockwell hardness HRC values (under heat treatment process as above) are 53 to the titanium alloy being prepared after testing, room temperature
Tensile strength RmFor 1717MPa, yield strength Rp0.2It is 7.0% for 1558MPa, elongation after fracture A, alpha+beta → beta transformation point temperature
It is 975 DEG C ± 5 DEG C.
Embodiment 5：The preparation and detection (five) of titanium alloy material
Titanium alloy component proportioning manufactured in the present embodiment is Ti-7.5Al-1Sn-2Zr-3.5Mo-2.5V-2.5Cr-
1.5Nb, the titanium alloy equivalent thickness of aluminium are that 8.97 , Molybdenum equivalents are 9.91.It is Al-Sn50, Al-Mo80, Al- that titanium alloy, which prepares raw material,
V60, Al-Nb62, electrolysis chromium, aluminium shot, sponge zirconium and 0 grade of titanium sponge.
Specifically preparation process is：
(1) compacting obtains electrode after mixing raw material by design ingredient, is cast through vacuum consumable electrode arc furnace melting three times
Ingot；
(2) alloy is using three fiery forging technologies, cogging forging：1150 DEG C, deflection 50%；Two fire forgings：940 DEG C, deflection
50%；Three fire forgings：920 DEG C, deflection 50%；
(3) rolling mill practice：Rolling temperature is 930 DEG C, and total deformation 70% rolls to obtain 10mm heavy-gauge sheetings.
Orthogonal heat treatment experiment is carried out to sheet alloy, more preferably heat treatment process is 890 DEG C/1h, AC+350 DEG C/
1h ,+500 DEG C/8h, AC.
Thus the Rockwell hardness HRC values (under heat treatment process as above) are 54 to the titanium alloy being prepared after testing, room temperature
Tensile strength RmFor 1793MPa, yield strength Rp0.2It is 6.0% for 1628MPa, elongation after fracture A, alpha+beta → beta transformation point temperature
It is 970 DEG C ± 5 DEG C.
Embodiment 6：The preparation and detection (six) of titanium alloy material
Titanium alloy component proportioning manufactured in the present embodiment is Ti-8Al-0.5Sn-1Zr-4Mo-2.5V-3Cr-2Nb, and titanium closes
The golden equivalent thickness of aluminium is that 9.13 , Molybdenum equivalents are 11.39.It is Al-Sn50, Al-Mo80, Al-V60, Al- that titanium alloy, which prepares raw material,
Nb62, electrolysis chromium, aluminium shot, sponge zirconium and 0 grade of titanium sponge.
Specifically preparation process is：
(1) compacting obtains electrode after mixing raw material by design ingredient, is cast through vacuum consumable electrode arc furnace melting three times
Ingot；
(2) alloy is using three fiery forging technologies, cogging forging：1150 DEG C, deflection 50%；Two fire forgings：940 DEG C, deflection
50%；Three fire forgings：920 DEG C, deflection 50%；
(3) rolling mill practice：Rolling temperature is 930 DEG C, and total deformation 70% rolls to obtain 10mm heavy-gauge sheetings.
Orthogonal heat treatment experiment is carried out to sheet alloy, more preferably heat treatment process is 890 DEG C/1h, AC+350 DEG C/
1h ,+500 DEG C/8h, AC.
Thus the Rockwell hardness HRC values (under heat treatment process as above) are 55 to the titanium alloy being prepared after testing, room temperature
Tensile strength RmFor 1871MPa, yield strength Rp0.2It is 5.5% for 1682MPa, elongation after fracture A, alpha+beta → beta transformation point temperature
It is 970 DEG C ± 5 DEG C.
Above-described embodiment is to the present invention for example, the present invention can also be with other ad hoc fashions or others
Particular form is implemented, without departing from the gist of the invention or substantive characteristics.Therefore, from the point of view of the embodiment of description is in terms of any
It is regarded as illustrative and non-limiting.The scope of the present invention should illustrate by appended claims, any and claim
Intention and the equivalent variation of range should also be included in the scope of the present invention.
Claims (7)
1. a kind of high-hardness titanium alloy, it is characterised in that：The high-hardness titanium alloy also contains weight in addition to mainly containing Ti
The V of the Mo of the Zr of the Sn of the Al of percentage 6.0-8.0%, 0.5-2.5%, 1.0-3.0%, 2.0-4.0%, 0.5-2.5%,
The Nb of the Cr of 0.5-3.0%, 1.0-3.0% and micro inevitable impurity.
2. high-hardness titanium alloy according to claim 1, it is characterised in that：Fe's contains in the inevitable impurity
Amount is less than the 0.1% of titanium alloy total weight less than 0.3%, C and O the single-element content of titanium alloy total weight, the content of H element
Less than the 0.001% of titanium alloy total weight, the content of N element is less than the 0.05% of titanium alloy total weight, other impurities element
Content summation is less than the 0.1% of titanium alloy total weight.
3. the preparation method of high-hardness titanium alloy according to claim 1 or 2, which is characterized in that the preparation method
Include the following steps：
(1) by raw material aluminium tin intermediate alloy, aluminium molybdenum intermediate alloy, aluminium vanadium intermediate alloy, aluminium niobium intermediate alloy, aluminium shot, electrolysis
Compacting obtains electrode after pure chromium, sponge zirconium, titanium sponge mixing, and electrode melting is sequentially prepared alloy melting once ingot casting, alloy two
Secondary melting ingot casting, alloy melting ingot casting three times；
(2) after ingot casting surface strips off the skin, riser is cut after completing x-ray inspection, carries out cogging forging and more fire time high temperature forgings, rolling
It handles to obtain high-hardness titanium alloy by solution treatment and multistage aging.
4. preparation method according to claim 3, it is characterised in that：In step (2), the cogging forging temperature is
1100-1150 DEG C, soaking time 240-300 minutes；More fire time high temperature forging temperature are 900-960 DEG C, soaking time
120-180 minutes.
5. preparation method according to claim 3, it is characterised in that：In step (2), the temperature of the rolling is 850-
950 DEG C, soaking time 120-180 minutes；The total deformation of the rolling is 50-70%.
6. preparation method according to claim 3, it is characterised in that：In step (2), the temperature of the solution treatment is
780 DEG C to (Tβ- 30 DEG C), soaking time 0.5-2h；The type of cooling of the solution treatment is air-cooled or water cooling.
7. preparation method according to claim 3, it is characterised in that：In step (2), the multistage aging processing when
It is 350-600 DEG C to imitate temperature, and timeliness soaking time is 2-24h.
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| CN111647835A (en) * | 2020-06-01 | 2020-09-11 | 南京理工大学 | Method for improving mechanical heat treatment of beta-type titanium alloy |
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| CN115927911A (en) * | 2022-12-26 | 2023-04-07 | 西部金属材料股份有限公司 | High-hardness titanium alloy and preparation method and application thereof |
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| CN111647835A (en) * | 2020-06-01 | 2020-09-11 | 南京理工大学 | Method for improving mechanical heat treatment of beta-type titanium alloy |
| CN111761258A (en) * | 2020-06-24 | 2020-10-13 | 中国船舶重工集团公司第七二五研究所 | Welding wire of Ti62A alloy suitable for manned submersible and preparation method thereof |
| CN111761258B (en) * | 2020-06-24 | 2022-01-28 | 中国船舶重工集团公司第七二五研究所 | Welding wire of Ti62A alloy suitable for manned submersible and preparation method thereof |
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| CN115612876B (en) * | 2022-10-31 | 2023-11-14 | 洛阳双瑞精铸钛业有限公司 | Preparation method of beta-type titanium alloy plate |
| CN115927911A (en) * | 2022-12-26 | 2023-04-07 | 西部金属材料股份有限公司 | High-hardness titanium alloy and preparation method and application thereof |
| CN115927911B (en) * | 2022-12-26 | 2024-04-02 | 西部金属材料股份有限公司 | High-hardness titanium alloy and preparation method and application thereof |
| CN116145065A (en) * | 2023-02-27 | 2023-05-23 | 沈阳工业大学 | Multistage heat treatment method for improving vickers hardness of TC4 titanium alloy additive components |
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