CN110484772A - A kind of preparation process of high-performance and low-cost titanium alloy - Google Patents
A kind of preparation process of high-performance and low-cost titanium alloy Download PDFInfo
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- CN110484772A CN110484772A CN201910743773.1A CN201910743773A CN110484772A CN 110484772 A CN110484772 A CN 110484772A CN 201910743773 A CN201910743773 A CN 201910743773A CN 110484772 A CN110484772 A CN 110484772A
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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
- 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
- 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
A kind of preparation process of high-performance and low-cost titanium alloy, specific preparation process is as follows: a small amount of sponge Ti being carried out bottoming, is bound, be laid with one layer of sponge Ti, reclaimed materials, intermediate alloy mixture, Al beans and Cr mixture, repeat above-mentioned to be squeezed into electrode block after laying 3 ~ 4 times；Twice by electrode block melting, the both ends of the surface after melting and side strip off the skin, and obtain blank；Blank is successively carried out to no less than 3 fire time forgings, 3-4 fire time rolling, obtains titanium alloy semi-finished product material；Titanium alloy semi-finished product material is cut into after required size is neatly put and is annealed；The titanium alloy plate of screenability qualification carries out surface reconditioning processing, both obtains titanium alloy plate.Present invention process is simple, it can be achieved that stable mass production, the titanium alloy plate comprehensive performance of preparation is good, by rolling and annealing, tensile strength >=1050MPa, and 1000 ~ 1150MPa of yield strength, elongation percentage >=10%.
Description
Technical field
The invention belongs to titanium alloy plate preparation technical fields, and in particular to a kind of preparation of high-performance and low-cost titanium alloy
Technique.
Background technique
Lightweight composite armour is to begin one's study from the 6's 0 of 2nd 0 century and application, is keeping composite armour trajectory
In the case where performance and the repeatedly slightly raising of resistance bullet attacking ability, plate armour is greatly reduced with lightweight back veneer material as far as possible
The weight of system.The plate armour of Lightweight Combat Vehicle is limited by vehicle weight always, as army increasingly relies on these vehicles for counsel
, armor facing problem is also more and more prominent, therefore, various countries be committed to develop have stronger ballistic protection ability and
The unobvious armour material for increasing car weight.
Titanium alloy has the advantages that specific strength is high, good without magnetic, corrosion-resistant and dynamic property, is used for armored combat vehicle, can be with
The weight for mitigating battlebus significantly, improves the mobility of battlebus, has very big advantage compared to traditional armour steel.Titanium alloy is
The armor facing material haveing excellent performance, toughness is better than aluminium alloy, and the density of titanium alloy is 60% of armour steel or so, and intensity connects
Nearly armour steel is suitable, and the protective performance of titanium alloy armor is more superior by 30 ~ 40% than the homogeneous steel armor of equivalent weight, but due to
Early stage titanium alloy cost is equivalent to 10 ~ 20 times of same protective performance armour steel, therefore titanium alloy does not have on tank armor vehicle
It is used widely.As titanium cost reduces, research and application of the titanium on armored vehicle start gradually to increase.
Titanium alloy is currently used primarily in the hatchcover components of armored vehicle, additional top plating, turret base ring, vehicle commander's hatchcover, hair
Motivation top cover etc..Titanium alloy armor component have hatchcover components, additional top plating, turret base ring, vehicle commander's hatchcover, gun turret exhaustion plate,
Core chemical and biological weapons countermeasure system protecting cover, the main sighting hood of gunner, bonnet, gun turret pivotable frame, thermal imaging scope cover, liquid
Press pneumatic suspension system and Future Battle System (FCS) wheeled vehicle lower body.
In terms of research and development, the U.S., Europe, Australia and India etc. are to TC4(Ti-6Al-4V) it has conducted extensive research,
The U.S. armoring (6.35mm) thin to titanium alloy, low-cost manufacturing technique are studied, and Australia has studied TC4 and Ti-
8Al-1Mo-1V alloy, the U.S., european union have studied Ti-6Al-1.8Fe-0.1Si, Germany and Austria's research TiAl material
Material, specifically includes that SiC/GRFP/Ti composite armour, Ti-6Al-4V panel/steel backing plate are compound in the research of application aspect
Plate etc..
On domestic armored vehicle, there are no bulk to use titanium alloy, since the target of strategic demand China is big
Amount develops Light armoured vehicle, in addition, the annual new equipment of China or the several hundred Tank and Armoured Vehicles that change the outfit, this needs a large amount of use
New material and novel armour material, titanium alloy are important potential alternative materials, and titanium alloy does armour material, loss of weight and protective
Can preferably, the prospect that good ballistic performance and cost constantly reduce promotes its broader applications.But current titanium alloy is smooth
Dosage on gram is also seldom, is in the market development phase, such as domestic only a small amount of TC4 alloy sheets make for tank construction part
With the mainly thin plate of 2 ~ 8mm.
In order to reduce tank weight and substitution steel armor material, armoring field proposes high-performance and low-cost titanium alloy and needs
It asks, it is desirable that titanium alloy intensity >=1050MPa, elongation percentage >=10% simultaneously have good comprehensive performance, in addition armoring to be answered with titanium alloy
With also not universal, in addition to application accumulation is not enough and other than intensity is not high enough, at high cost is also the major reason that limitation is applied,
Therefore when exploitation Ti alloy with high performance, low cost is also taken into account.
Summary of the invention
To solve the above problems, the present invention provides a kind of preparation process of high-performance and low-cost titanium alloy, have high-performance,
The feature of low cost is high by rationally designing ingredient, the raw material for selecting low cost, suitable forging technology and technology of preparing acquisition
The titanium alloy of performance low cost.
The technical scheme is that a kind of preparation process of high-performance and low-cost titanium alloy, specific preparation process is as follows:
Step 1: a small amount of sponge Ti is carried out bottoming, is bound, one layer of sponge Ti, reclaimed materials, intermediate alloy mixture, Al beans are spread
With the mixture of Cr, repeats above-mentioned laying 3-4 times, electrode block is squeezed into after the completion of ingredient；
Step 2: twice by electrode block melting, baking oven drying is put after the welding from beginning to end of the primary ingot casting of melting, melting is secondary
The shrinkage cavity of arc end is received in wire cutting removal after ingot casting flaw detection, and both ends of them face and side strip off the skin, and obtains blank；
Step 3: the blank in step 2 successively to be carried out to no less than 3 fire time forgings, 3-4 fire time rolling, titanium alloy plate is obtained
Base；
It anneals Step 4: titanium alloy semi-finished product material is cut into after required size is neatly put, annealing temperature is 750 ~ 850
DEG C, obtain finished product material；
Step 5: from step 4 screenability qualification finished product material, carry out surface reconditioning processing, both titanium alloy plate.
It advanced optimizes, the intermediate alloy in the step 1 is the mixture of Cr50Fe and Mo50Fe.
It advanced optimizes, the reclaimed materials in the step 1 is one of TA1, TA2, TA5, TA6.
It advanced optimizes, it is that vacuum consumable electrode arc furnace carries out melting that melting, which uses, in the step 2.
It advanced optimizes, the first fire time and the second fire carry out two upsettings two respectively in the forging process in the step 3
It pulls out, each upsetting and pulls out all not less than 33% deflection, control final forging temperature is 800 DEG C or more.
It advanced optimizes, in the operation of rolling in the step 3, annealing temperature is transformation temperature or more when a fire time rolls
10-50 DEG C, deflection is greater than 50%；Annealing temperature is to close on transformation temperature when two fire time rollings, and deflection is greater than 50%；Three fire roll
Annealing temperature is lower than transformation temperature when processed, and deflection is greater than 30%；When four fire time rollings annealing temperature be lower than 10 DEG C of transformation temperature with
On, deflection is less than 40%.
It advanced optimizes, passes through reconditioning, sandblasting, pickling after a fire time rolling, two fire time rollings, three fire time rollings
Or alkali pickling removes surface defect.
It advanced optimizes, annealing way is that individual is annealed, leads in chamber type electric resistance furnace using roller furnace in the step 5
Laminated steel is crossed to carry out pressing one of orthopedic annealing.
It advanced optimizes, surface repairing method is that reconditioning, sandblasting, pickling, soda acid one of are washed in the step 6.
The beneficial effects of the present invention are:
One, titanium alloy cost prepared by the present invention is substantially reduced, and Al, Fe, the Cr used is low price element, Mo be effect most
Good β phase stable element and price ratio Nb and V etc. is low, in addition uses partially recycled material, and technique is rationally arranged in when forging, reduces forging
It makes fiery time, reduce cost, so that cost of alloy reduces, reduce by 20% or so than TC4 alloy；
Two, the titanium alloy sheet of 2 ~ 20mm of thickness range can be produced, plate maximum width is 1000-1150mm, maximum length is
3000mm is, it can be achieved that finished product plate unevenness≤5mm/m；
In conclusion present invention process is simple, it can be achieved that stable mass production, the titanium alloy plate comprehensive performance of preparation are good
It is good, by rolling and annealing, tensile strength >=1050MPa, 1000 ~ 1150MPa of yield strength, elongation percentage >=10%.
Detailed description of the invention
Fig. 1 is the microstructure of 17mm plate tissue
Fig. 2 is the microstructure of 7mm plate tissue.
Specific embodiment
The present invention is specifically described with reference to embodiments, it is necessary to it is pointed out here that the present embodiment is served only for this hair
It is bright to be further explained explanation, it should not be understood as limiting the scope of the invention, the known personnel in the field can basis
The content of foregoing invention makes some nonessential improvement and adjustment.
A specific embodiment of the invention are as follows:
A kind of preparation process of high-performance and low-cost titanium alloy, specific preparation process is as follows:
Step 1: a small amount of sponge Ti is carried out bottoming, is bound, one layer of sponge Ti, reclaimed materials, intermediate alloy mixture, Al beans are spread
With the mixture of Cr, repeats above-mentioned laying 3 ~ 4 times, electrode block is squeezed into after the completion of ingredient；
Step 2: twice by electrode block melting, baking oven drying is put after the welding from beginning to end of the primary ingot casting of melting, melting is secondary
The shrinkage cavity of arc end is received in wire cutting removal after ingot casting flaw detection, and both ends of them face and side strip off the skin, and obtains blank；
Step 3: the blank in step 2 successively to be carried out to no less than 3 fire time forgings, 3 ~ 4 fire time rollings, titanium alloy plate is obtained
Base；
It anneals Step 4: titanium alloy plate base is cut into after required size is neatly put, annealing temperature is 750 ~ 850
DEG C, obtain finished product material；
Step 5: from step 4 screenability qualification finished product material, carry out surface reconditioning processing, both titanium alloy plate.
It advanced optimizes, the intermediate alloy in the step 1 is the mixture of Cr50Fe and Mo50Fe.
It advanced optimizes, the reclaimed materials in the step 1 is one of TA1, TA2, TA5, TA6.
It advanced optimizes, it is that vacuum consumable electrode arc furnace carries out melting that melting, which uses, in the step 2.
It advanced optimizes, the first fire time and the second fire carry out two upsettings two respectively in the forging process in the step 3
It pulls out, each upsetting and pulls out all not less than 33% deflection, control final forging temperature is 800 DEG C or more.
It advanced optimizes, in the operation of rolling in the step 3, annealing temperature is transformation temperature or more when a fire time rolls
10-50 DEG C, deflection is greater than 50%；Annealing temperature is to close on transformation temperature when two fire time rollings, and deflection is greater than 50%；Three fire roll
Annealing temperature is lower than transformation temperature when processed, and deflection is greater than 30%；When four fire time rollings annealing temperature be lower than 10 DEG C of transformation temperature with
On, deflection is less than 40%.
It advanced optimizes, passes through reconditioning, sandblasting, pickling after a fire time rolling, two fire time rollings, three fire time rollings
Or alkali pickling removes surface defect.
It advanced optimizes, annealing way is that individual is annealed, leads in chamber type electric resistance furnace using roller furnace in the step 5
Laminated steel is crossed to carry out pressing one of orthopedic annealing.
It advanced optimizes, surface repairing method is that reconditioning, sandblasting, pickling, soda acid one of are washed in the step 6.
Embodiment 1
O grades of sponge Tis, 20%TA5 plate, Cr50Fe, Mo50Fe, Cr and Al beans electrode pressing are selected, certainly using German ALD vacuum
Consumption electric arc furnaces progress melting twice, diameter 220mm, the diameter 290mm of second of ingot casting of first time ingot casting, in the present invention,
Ingot casting ingredient is Ti-8.2Al-1.4Cr-0.95Fe-0.86Mo, obtains flaw detection grade A grades, low power behind 3 fire time forgings, milling face
For tissue to obscure brilliant titanium alloy slab, size of plate blank is 90 × 950 × 1200mm.
It is tested through DSC thermal analyzer, Ti-8.2Al-1.4Cr-0.95Fe-0.86Mo alloy phase change point is 1012 DEG C, a fire
1025 DEG C of secondary rolling temperature, a fire time rolling thickness are 17mm, deformation rate 82%, and strip off the skin polishing after rolling, and removal surface superficial is split
Line defect；Two fire time rolling thickness 7mm, deformation rate 59%, polishing removal surface defect, respectively rolls 17mm and 7mm after rolling
Titanium alloy plate is made annealing treatment, and 850 DEG C of annealing temperature, wherein the intensity of 17mm titanium alloy plate is 1134MPa, surrender
Intensity 1054MPa, elongation percentage 18%, the intensity of 7mm titanium alloy plate are 1121MPa, yield strength 1041MPa, elongation percentage 14%,
Strong plasticity is preferable, as shown in Figure 1, the microscopic metallographic structure of the titanium alloy plate with a thickness of 17mm, be by isometric and strip α phase+
Transformed β phase composition；As shown in Fig. 2, with a thickness of the titanium alloy plate tissue of 7mm, be by a small amount of isometric and more strip α phase+turn
Become β phase composition.
1 plate armour of table bombards test with titanium plate
Respectively to the titanium alloy plate with a thickness of 17mm and 7mm Ti-8.2Al-1.4Cr-0.95Fe-0.86Mo of above-mentioned preparation
It carries out bombarding test, test parameter and test result are as shown in table 1, and for the titanium alloy plate with a thickness of 17mm, selection is penetrated
When away from 125m, 34 ° of normal angle, titanium plate can defend 54 formula 12.7mm armor-piercing incendiaries, when selection is penetrated away from 100m, 24 ° of normal angle, titanium
Defensive 53 formula 7.62mm armor-piercing incendiaries；For with a thickness of 7mm titanium alloy plate+4.5mm steel plate composite armour, penetrate away from
100m, 75 ° of normal angle defensive PG87 formula 25mm armor-piercing incendiaries.
Embodiment 2
Alloy cast ingot is prepared using the method with embodiment 1, selects O grades of titanium sponges, 30%TA1 plate, Cr50Fe, Mo50Fe, Cr
With Al beans electrode pressing, melting twice is carried out using German ALD vacuum consumable electrode arc furnace, first time ingot diameters are 220mm, the
Secondary ingot diameters are 290mm, and ingot casting ingredient is Ti-8.1Al-1.2Cr-1.05Fe-0.91Mo, O content 0.1%, by 3 fire
Secondary forging obtains grade A grade of flaw detection behind milling face, the alloy slab that macrostructure be fuzzy crystalline substance, size of plate blank for 90 × 950 ×
1200mm。
It is tested through DSC thermal analyzer, Ti-8.1Al-1.2Cr-1.05Fe-0.91Mo alloy phase change point is 1010 DEG C, a fire
1025 DEG C of secondary rolling temperature, heating once and rolling is with a thickness of 17mm, and deformation rate 82%, strip off the skin polishing after rolling, removes surface superficial crackle
Defect；Two fire time rolling thickness 7mm, deformation rate 59%, polishing removal surface defect after rolling；Three fire time rolling thickness 4mm, become
Form quotient 43%, sandblasting pickling after rolling；Four fire time rolling thickness 3mm, deformation rate 25%, reconditioning remove defect, are then in temperature
Finished products at 830 DEG C finally carry out alkali pickling, and by test, the intensity of 3mm sheet alloy prepared by the present invention is
1149MPa, yield strength 1063MPa, elongation percentage 12%.
2 composite armour of table bombards test
3mm sheet alloy is bombarded into test by plate armour, test parameter and test result are as shown in table 2, using composite armour,
3mm titanium plate+6mm steel plate is penetrated away from 100m, 75 ° of normal angle, can defend PG87 formula 25mm armor-piercing incendiary.
Main feature of the invention, application method, basic principle and advantages of the present invention has been shown and described above.This
Industry technology personnel are it should be appreciated that the present invention is not limited to the above embodiments, described in above-described embodiment and invention book only
It is invention the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention can also have according to the actual situation
Various changes and modifications, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention
It is defined by the appending claims and its equivalent thereof.
Claims (9)
1. a kind of preparation process of high-performance and low-cost titanium alloy, which is characterized in that specific preparation process is as follows:
Step 1: a small amount of sponge Ti is carried out bottoming, is bound, one layer of sponge Ti, reclaimed materials, intermediate alloy mixture, Al beans are spread
With the mixture of Cr, repeats above-mentioned laying 3-4 times, electrode block is squeezed into after the completion of ingredient；
Step 2: twice by electrode block melting, baking oven drying is put after the welding from beginning to end of the primary ingot casting of melting, melting is secondary
The shrinkage cavity of arc end is received in wire cutting removal after ingot casting flaw detection, and both ends of them face and side strip off the skin, and obtains blank；
Step 3: the blank in step 2 successively to be carried out to no less than 3 fire time forgings, 3-4 fire time rolling, obtain titanium alloy half at
Product material；
It anneals Step 4: titanium alloy semi-finished product material is cut into after required size is neatly put, annealing temperature is 750 ~ 850
DEG C, obtain finished product material；
Step 5: from step 4 screenability qualification finished product material, carry out surface reconditioning processing, both titanium alloy plate.
2. a kind of preparation process of high-performance and low-cost titanium alloy as described in claim 1, which is characterized in that the step 1
In intermediate alloy be Cr50Fe and Mo50Fe mixture.
3. a kind of preparation process of high-performance and low-cost titanium alloy as described in claim 1, which is characterized in that the step 1
In reclaimed materials be one of TA1, TA2, TA5, TA6.
4. a kind of preparation process of high-performance and low-cost titanium alloy as described in claim 1, which is characterized in that the step 2
It is that vacuum consumable electrode arc furnace carries out melting that middle melting, which uses,.
5. a kind of preparation process of high-performance and low-cost titanium alloy as described in claim 1, which is characterized in that the step 3
In forging process in the first fire time and the second fire time carry out two upsettings two respectively and pull out, each upsetting and pulling out all becomes not less than 33%
Shape amount, control final forging temperature are 800 DEG C or more.
6. a kind of preparation process of high-performance and low-cost titanium alloy as described in claim 1, which is characterized in that the step 3
In the operation of rolling in, one fire time rolling when annealing temperature be above 10-50 DEG C of transformation temperature, deflection be greater than 50%；Two fire roll
Annealing temperature is to close on transformation temperature when processed, and deflection is greater than 50%；Annealing temperature is lower than transformation temperature, deformation when three fire time rollings
Amount is greater than 30%；Annealing temperature is lower than 10 DEG C of transformation temperature or more when four fire time rollings, and deflection is less than 40%.
7. a kind of preparation process of high-performance and low-cost titanium alloy as claimed in claim 6, which is characterized in that a fire
Surface defect is removed by reconditioning, sandblasting, pickling or alkali pickling after rolling, two fire time rollings, three fire time rollings.
8. a kind of preparation process of high-performance and low-cost titanium alloy as described in claim 1, which is characterized in that the step 5
Middle annealing way is that individual is annealed, carries out pressing one in orthopedic annealing by laminated steel in chamber type electric resistance furnace using roller furnace
Kind.
9. a kind of preparation process of high-performance and low-cost titanium alloy as described in claim 1, which is characterized in that the step 6
Middle surface repairing method is that reconditioning, sandblasting, pickling, soda acid one of are washed.
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Cited By (3)
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|---|---|---|---|---|
| CN111519067A (en) * | 2020-05-26 | 2020-08-11 | 西北有色金属研究院 | High-performance, low-cost and high-strength titanium alloy |
| CN112680629A (en) * | 2020-11-23 | 2021-04-20 | 昆明理工大学 | Short-process preparation method of Ti-Al-V-Fe alloy hot rolled 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 |
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| CN112680629A (en) * | 2020-11-23 | 2021-04-20 | 昆明理工大学 | Short-process preparation method of Ti-Al-V-Fe alloy hot rolled 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 |
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