CN108396270A - A method of producing α, nearly α or alpha+beta titanium alloys bar - Google Patents
A method of producing α, nearly α or alpha+beta titanium alloys bar Download PDFInfo
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- CN108396270A CN108396270A CN201810535435.4A CN201810535435A CN108396270A CN 108396270 A CN108396270 A CN 108396270A CN 201810535435 A CN201810535435 A CN 201810535435A CN 108396270 A CN108396270 A CN 108396270A
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The invention discloses a kind of method producing α, nearly α or alpha+beta titanium alloys bar, this method includes：Step 1: the pier that titan alloy casting ingot is carried out more than transformation temperature after 160 DEG C of heating and thermal insulations to a fire time pulls out forging, blank among titanium alloy is obtained through round as a ball；Step 2: blank reconditioning among titanium alloy is handled；Three, by blank 500 DEG C of preheating insulations below transformation temperature among titanium alloy, then 70 DEG C of first heating and thermal insulations below transformation temperature, then the diameter forging of a fire time is carried out, through aligning to obtain titanium alloy bar stock；Four, aligning obtains α, nearly α and alpha+beta titanium alloys bar after titanium alloy bar stock being annealed.The present invention is pulled out and a fire time diameter forging molding using the large deformation pier of a fire time, so that the crystal grain in titan alloy casting ingot tissue is obtained rapid refinement and is crushed, then makes blank each section homogeneous deformation among titanium alloy, to reduce the number of base, production efficiency is improved, production cost is reduced.
Description
Technical field
The invention belongs to titanium alloy technical fields, and in particular to a method of producing α, nearly α or alpha+beta titanium alloys bar.
Background technology
It is known as alpha titanium alloy containing α stable elements and in the titanium alloy that ambient-temp-stable state lower substrate is α phases, using α phases as base
Body, the titanium alloy for only containing a small amount of β phases are known as near αtitanium alloy, are claimed by the titanium alloy of α phases and β phase compositions under ambient-temp-stable state
For alpha+beta titanium alloys.Since alpha titanium alloy, near αtitanium alloy and alpha+beta titanium alloys material have both corrosion-resistant and excellent mechanical performance,
Multiple industries are widely used.
The preparation method of alpha titanium alloy bar, near αtitanium alloy bar and alpha+beta titanium alloys bar is typically to obtain vacuum melting
To crystal grain it is relatively coarse and carry out forging processing with the titan alloy casting ingot of open texture structure, it is relatively thin to obtain crystal grain
Titanium alloy rod bar small and with compact tissue structure and particular characteristic.Alpha titanium alloy bar, near αtitanium alloy bar and alpha+beta titanium close
The mechanical property of golden bar is related to its heterogeneous microstructure and morphology, and microstructure refines and structural arrangement is orderly, titanium
The mechanical property of alloy bar material is better, the coarse structure disturbance of microstructure, and the mechanical property of titanium alloy rod bar reduces.Close to phase
Height or higher than being heated under conditions of phase point temperature, the crystal grain of titanium alloy becomes thick, or even generates crystal boundary, titanium alloy
Mechanical property deteriorate.Therefore, more sensitive to temperature during titanic alloy machining.
The preparation process of alpha titanium alloy bar, near αtitanium alloy bar and alpha+beta titanium alloys bar generally continues to use in industry at present
Or with reference to Soviet Union technique, use first 2000 tons of hydraulic presses by titan alloy casting ingot respectively 100 DEG C~150 DEG C more than transformation temperature,
More than transformation temperature 20 DEG C~50 DEG C, 20 DEG C~50 DEG C upsetting pull bases below transformation temperature, then use the open die forging of 500kg~5t empty
Pneumatic hammer 20 DEG C~50 DEG C forgings below transformation temperature obtain finished product.The technique carries out 1 fire under the temperature condition higher than transformation temperature
The secondary above cogging forging, and more fire time forgings are also being carried out less than transformation temperature, so that the tissue for keeping casting state coarse changes
The kind tissue as crystal grain refinement, since process is more, there is complex process, the shortcomings of time-consuming and disturbing factor is more, institute
The consistency and stability of obtained titanium alloy rod bar are poor.
Invention content
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of production α, nearly α
Or the method for alpha+beta titanium alloys bar.This method makes titanium alloy using a fire time large deformation upsetting pull base and a fire time diameter forging molding
Crystal grain rapid refinement in ingot structure and broken, deformation is more uniform, greatly reduces the number of base, simplifies production step
Suddenly, production efficiency is improved, production cost is reduced.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of production α, nearly α or alpha+beta titanium alloys stick
The method of material, which is characterized in that this approach includes the following steps：
Step 1: titan alloy casting ingot is carried out heating and thermal insulation more than transformation temperature under conditions of 160 DEG C, a fire is then carried out
Secondary upsetting pull forging, obtains blank among titanium alloy after round as a ball；The titan alloy casting ingot is alpha titanium alloy ingot casting, near αtitanium alloy
Ingot casting or alpha+beta titanium alloys ingot casting, the titan alloy casting ingot meet GB/T 26060-2010《Titanium and titanium alloy ingot casting》Requirement；
The upsetting pull is forged to the forging that nine upsettings nine are pulled out, and the final forging temperature of the upsetting pull forging is not less than 200 DEG C below transformation temperature；It is described
A diameter of 150mm~270mm of blank among titanium alloy；
Step 2: blank among the titanium alloy obtained in step 1 is carried out reconditioning processing, splitting for end and surface is removed
The defects of line, folding；
Step 3: by step 2 through blank among reconditioning treated titanium alloy below transformation temperature 500 DEG C of condition
Under preheated and kept the temperature, be then heated under conditions of 70 DEG C of transformation temperature or less and first keep the temperature, then one is carried out using diameter forging machine group
Fiery diameter forging, and straightening processing is carried out using diameter forging residual temperature, obtain titanium alloy bar stock；It is handled through reconditioning in the diameter forging process
The clamped rotation of blank moves radially among titanium alloy afterwards, same transversal while blank moves radially among titanium alloy
Beaten by 4 tups on face, returns round necking deformation until forging size；Wherein, in 4 tups between two neighboring tup
Angle be 90 °, the speed of the rotation is 30r/min；The total deformation of the diameter forging of one fire time is not less than 45%；
Step 4: the titanium alloy bar stock obtained in step 3 is made annealing treatment, and aligned using annealing residual temperature,
Obtain titanium alloy rod bar；The room-temperature mechanical property of the titanium alloy rod bar meets GB/T2965-2007《Titanium or titanium alloy bar》
Requirement.
A kind of above-mentioned method producing α, nearly α or alpha+beta titanium alloys bar, which is characterized in that titanium described in step 1 closes
A diameter of 500mm~700mm of golden ingot casting, a diameter of 50mm~200mm of titanium alloy rod bar described in step 4.
A kind of above-mentioned method producing α, nearly α or alpha+beta titanium alloys bar, which is characterized in that titanium described in step 1 closes
The quality of golden ingot casting is 500kg~1000kg.
A kind of above-mentioned method producing α, nearly α or alpha+beta titanium alloys bar, which is characterized in that upsetting pull described in step 1
The pass deformation of forging is not less than 30%.
Compared with the prior art, the present invention has the following advantages：
1, the present invention carries out a fire time large deformation upsetting pull base and a fire time diameter forging molding, production to titan alloy casting ingot successively
Alpha titanium alloy bar, near αtitanium alloy bar and alpha+beta titanium alloys bar, first by big under the conditions of 160 DEG C more than transformation temperature
Upsetting pull is deformed, so that the crystal grain in titan alloy casting ingot tissue is obtained rapid refinement and is fully crushed, obtains blank among titanium alloy, so
Using diameter forging machine group to carry out blank among titanium alloy afterwards, successively radially rotation is beaten and axial pulling deforms, and is made among titanium alloy
Blank each section homogeneous deformation, while the tissue gross defects of blank among the titanium alloy after upsetting pull are improved, reduce crackle
Generation, greatly reduce the number of base, simplify production stage, improve production efficiency, reduce production cost.
2, the present invention carries out high temperature upsetting pull more than transformation temperature under conditions of 160 DEG C, smaller in the resistance of deformation of titanium alloy
In the case of, make alpha titanium alloy ingot casting, near αtitanium alloy ingot casting or alpha+beta titanium alloys ingot casting fully deformed, die break, to
Nine upsettings nine are completed in one fire time and pull out forging, are made coarse in alpha titanium alloy ingot casting, near αtitanium alloy ingot casting or alpha+beta titanium alloys ingot casting
Crystal grain is converted into the crystal grain of fine microstructures, and heterogeneous microstructure tends to be orderly, to ensure that the mechanics of product titanium alloy rod bar
Performance.
3, the present invention beats the continuous rapidly radially moving in rotation of blank progress among titanium alloy using diameter forging machine group, diameter forging
Deformation fever compensate for blank radiation among titanium alloy to a certain extent, the heat loss that convection current, conduction cool down, extend malleable
Time, to realize a fire time diameter forging molding.
4, the room temperature mechanics for alpha titanium alloy bar, near αtitanium alloy bar and the alpha+beta titanium alloys bar that the present invention is prepared
Performance meets GB/T2965-2007《Titanium or titanium alloy bar》In requirement.
Technical scheme of the present invention is described in further detail below by drawings and examples.
Description of the drawings
Fig. 1 is the micro-organization chart of TC4 titanium alloys centre blank prepared by the embodiment of the present invention 1.
Fig. 2 is the micro-organization chart of TC4 titanium alloy rod bars prepared by the embodiment of the present invention 1.
Fig. 3 is the micro-organization chart of TC4 titanium alloys centre blank prepared by the embodiment of the present invention 2.
Fig. 4 is the micro-organization chart of TC4 titanium alloy rod bars prepared by the embodiment of the present invention 2.
Fig. 5 is the micro-organization chart of TC4 titanium alloys centre blank prepared by the embodiment of the present invention 3.
Fig. 6 is the micro-organization chart of TC4 titanium alloy rod bars prepared by the embodiment of the present invention 3.
Fig. 7 is the micro-organization chart of TA15 titanium alloys centre blank prepared by the embodiment of the present invention 4.
Fig. 8 is the micro-organization chart of TA15 titanium alloy rod bars prepared by the embodiment of the present invention 4.
Fig. 9 is the micro-organization chart of TA2 titanium alloys centre blank prepared by the embodiment of the present invention 5.
Figure 10 is the micro-organization chart of TA2 titanium alloy rod bars prepared by the embodiment of the present invention 5.
Specific implementation mode
Diameter forging machine group employed in 1~embodiment of the embodiment of the present invention 5 is the SX-40 diameters forging of Austrian GFM companies
Unit.
Embodiment 1
The preparation method of the present embodiment includes the following steps：
Step 1: be 3200kg by quality, the TC4 titan alloy casting ingots remove feeders of a diameter of 500mm and emit bottom, then edge
It is the TC4 titan alloy casting ingots that 6 quality are 500kg length direction sawing, by the TC4 titan alloy casting ingots that quality is 500kg
First heating and thermal insulation 5h under conditions of 1150 DEG C, then carry out nine secondary upsettings nine of a fire piece by piece using 3000 tons of hydraulic presses and pull out forging,
Blank among TC4 titanium alloys is obtained after round as a ball；The titan alloy casting ingot meets GB/T 26060-2010《Titanium or titanium alloy is cast
Ingot》Requirement；The pressure speed of 3000 tons of hydraulic presses is 1~2 time/min；The pass deformation that forging is pulled out in nine upsetting nine is
50%, the final forging temperature that forging is pulled out in nine upsetting nine is 800 DEG C；A diameter of 150mm of blank among the TC4 titanium alloys；
Step 2: the TC4 titanium alloys centre blank progress reconditioning processing that will be obtained in step 1, removal end and surface
The defects of crackle, folding；
Step 3: by being carried out under conditions of 500 DEG C in advance through blank among reconditioning treated TC4 titanium alloy in step 2
Heat simultaneously keeps the temperature 2h, is then heated to 930 DEG C and first keeps the temperature, then carries out the diameter forging of a fire time, and is carried out at aligning using diameter forging residual temperature
Reason, obtains TC4 titanium alloy bar stocks；Through the clamped rotation of blank among reconditioning treated TC4 titanium alloy in the diameter forging process
It moves radially, is beaten by 4 tups on same cross section while blank moves radially among TC4 titanium alloys, return round contracting
Diameter deformation is until forging size；Wherein, the angle in 4 tups between two neighboring tup is 90 °, the speed of the rotation
Degree is 30r/min；The total deformation of the diameter forging of one fire time is 89%；
Step 4: the TC4 titanium alloys bar stock obtained in step 3 is carried out annealing 2h under conditions of 800 DEG C, so
It is air-cooled afterwards and using annealing residual temperature aligned, obtain TC4 titanium alloy rod bars；A diameter of 50mm of the TC4 titanium alloy rod bars.
After testing, the room-temperature mechanical property of TC4 titanium alloy rod bars manufactured in the present embodiment see the table below 1.
The room-temperature mechanical property of TC4 titanium alloy rod bars prepared by 1 embodiment 1 of table
As shown in Table 1, the room-temperature mechanical property of TC4 titanium alloy rod bars manufactured in the present embodiment meets GB/T2965-2007
《Titanium or titanium alloy bar》In requirement, illustrate that the preparation method of the present invention while reducing base and diameter and forging number, ensures
The mechanical properties of product TC4 titanium alloy rod bars.
Fig. 1 is the micro-organization chart of blank among TC4 titanium alloys manufactured in the present embodiment, as can be seen from Figure 1 this implementation
Blank is mainly made of the platelet α structure of β tissue compartments among TC4 titanium alloys prepared by example, and there are coarse boundlings, though illustrate
So the crystal grain in TC4 titanium alloy tissues is set to be refined and be crushed through excessive deformation upsetting pull forging, but still insufficient.
Fig. 2 is the micro-organization chart of TC4 titanium alloy rod bars manufactured in the present embodiment, as can be seen from Figure 2 the present embodiment system
Standby TC4 titanium alloy rod bars have a small amount of β tissues mainly by isometric α organizational compositions, illustrate that a fire time diameter forging makes TC4 titaniums
The deformation of blank tissue is more uniformly abundant among alloy, and the collection harness defects of blank among the TC4 titanium alloys after upsetting pull is made to obtain
Improve.
Embodiment 2
The preparation method of the present embodiment includes the following steps：
Step 1: be 3200kg by quality, the TC4 titan alloy casting ingots remove feeders of a diameter of 600mm and emit bottom, then edge
It is the TC4 titan alloy casting ingots that 4 quality are 750kg length direction sawing, by the TC4 titan alloy casting ingots that quality is 750kg
First heating and thermal insulation 5h under conditions of 1150 DEG C, then carry out nine secondary upsettings nine of a fire piece by piece using 3000 tons of hydraulic presses and pull out forging,
Blank among TC4 titanium alloys is obtained after round as a ball；The titan alloy casting ingot meets GB/T 26060-2010《Titanium or titanium alloy is cast
Ingot》Requirement；The pressure speed of 3000 tons of hydraulic presses is 1~2 time/min；The pass deformation that forging is pulled out in nine upsetting nine is
40%, the final forging temperature that forging is pulled out in nine upsetting nine is 800 DEG C；A diameter of 200mm of blank among the TC4 titanium alloys；
Step 2: the TC4 titanium alloys centre blank progress reconditioning processing that will be obtained in step 1, removal end and surface
The defects of crackle, folding；
Step 3: by being carried out under conditions of 500 DEG C in advance through blank among reconditioning treated TC4 titanium alloy in step 2
Heat simultaneously keeps the temperature 2h, is then heated to 930 DEG C and first keeps the temperature, then carries out the diameter forging of a fire time, and is carried out at aligning using diameter forging residual temperature
Reason, obtains TC4 titanium alloy bar stocks；Through the clamped rotation of blank among reconditioning treated TC4 titanium alloy in the diameter forging process
It moves radially, is beaten by 4 tups on same cross section while blank moves radially among TC4 titanium alloys, return round contracting
Diameter deformation is until forging size；Wherein, the angle in 4 tups between two neighboring tup is 90 °, the speed of the rotation
Degree is 30r/min；The total deformation of the diameter forging of one fire time is 45%；
Step 4: the TC4 titanium alloys bar stock obtained in step 3 is carried out annealing 2h under conditions of 800 DEG C, so
It is air-cooled afterwards and using annealing residual temperature aligned, obtain TC4 titanium alloy rod bars；The TC4 titanium alloy rod bars it is a diameter of
150mm。
After testing, the room-temperature mechanical property of TC4 titanium alloy rod bars manufactured in the present embodiment see the table below 2.
The room-temperature mechanical property of TC4 titanium alloy rod bars prepared by 2 embodiment 2 of table
As shown in Table 2, the room-temperature mechanical property of TC4 titanium alloy rod bars manufactured in the present embodiment meets GB/T2965-2007
《Titanium or titanium alloy bar》In requirement, illustrate that the preparation method of the present invention while reducing base and diameter and forging number, ensures
The mechanical properties of product TC4 titanium alloy rod bars.
Fig. 3 is the micro-organization chart of blank among TC4 titanium alloys manufactured in the present embodiment, as can be seen from Figure 3 this implementation
Blank is mainly by elongating α tissues and part mesh basket organizational composition among TC4 titanium alloys prepared by example, although illustrating through excessive deformation
Upsetting pull forging makes the crystal grain in TC4 titanium alloy tissues be refined and be crushed, but still insufficient.
Fig. 4 is the micro-organization chart of TC4 titanium alloy rod bars manufactured in the present embodiment, as can be seen from Figure 4 the present embodiment system
Standby TC4 titanium alloy rod bars are mainly made of isometric α tissues and platelet α structure, while having a small amount of β tissues, illustrate a fire
Diameter forging keeps the deformation of blank tissue among TC4 titanium alloys more uniformly abundant, makes the net of blank among the TC4 titanium alloys after upsetting pull
Basket tissue is improved.
Embodiment 3
The preparation method of the present embodiment includes the following steps：
Step 1: be 3200kg by quality, the TC4 titan alloy casting ingots remove feeders of a diameter of 700mm and emit bottom, then edge
It is the TC4 titan alloy casting ingots that 3 quality are 1000kg length direction sawing, by the TC4 titanium alloy castings that quality is 1000kg
Ingot first heating and thermal insulation 7h under conditions of 1150 DEG C, then carry out nine secondary upsettings nine of a fire piece by piece using 3000 tons of hydraulic presses and pull out forging
It makes, blank among TC4 titanium alloys is obtained after round as a ball；The titan alloy casting ingot meets GB/T 26060-2010《Titanium or titanium alloy
Ingot casting》Requirement；The pressure speed of 3000 tons of hydraulic presses is 1~2 time/min；The pass deformation of forging is pulled out in nine upsetting nine
It is 30%, the final forging temperature that forging is pulled out in nine upsetting nine is 800 DEG C；A diameter of 270mm of blank among the TC4 titanium alloys；
Step 2: the TC4 titanium alloys centre blank progress reconditioning processing that will be obtained in step 1, removal end and surface
The defects of crackle, folding；
Step 3: by being carried out under conditions of 500 DEG C in advance through blank among reconditioning treated TC4 titanium alloy in step 2
Heat simultaneously keeps the temperature 2h, is then heated to 930 DEG C and first keeps the temperature, then carries out the diameter forging of a fire time, and is carried out at aligning using diameter forging residual temperature
Reason, obtains TC4 titanium alloy bar stocks；Through the clamped rotation of blank among reconditioning treated TC4 titanium alloy in the diameter forging process
It moves radially, is beaten by 4 tups on same cross section while blank moves radially among TC4 titanium alloys, return round contracting
Diameter deformation is until forging size；Wherein, the angle in 4 tups between two neighboring tup is 90 °, the speed of the rotation
Degree is 30r/min；The total deformation of the diameter forging of one fire time is 45%；
Step 4: the TC4 titanium alloys bar stock obtained in step 3 is carried out annealing 2h under conditions of 800 DEG C, so
It is air-cooled afterwards and using annealing residual temperature aligned, obtain TC4 titanium alloy rod bars；The TC4 titanium alloy rod bars it is a diameter of
200mm。
After testing, the room-temperature mechanical property of TC4 titanium alloy rod bars manufactured in the present embodiment see the table below 3.
The room-temperature mechanical property of TC4 titanium alloy rod bars prepared by 3 embodiment 3 of table
As shown in Table 3, the room-temperature mechanical property of TC4 titanium alloy rod bars manufactured in the present embodiment meets GB/T2965-2007
《Titanium or titanium alloy bar》In requirement, illustrate that the preparation method of the present invention while reducing base and diameter and forging number, ensures
The mechanical properties of product TC4 titanium alloy rod bars.
Fig. 5 is the micro-organization chart of blank among TC4 titanium alloys manufactured in the present embodiment, as can be seen from Figure 5 this implementation
Blank is mainly made of the platelet α structure of β tissue compartments among TC4 titanium alloys prepared by example, and there are coarse boundlings, though illustrate
So the crystal grain in TC4 titanium alloy tissues is set to be refined and be crushed through excessive deformation upsetting pull forging, but still insufficient.
Fig. 6 is the micro-organization chart of TC4 titanium alloy rod bars manufactured in the present embodiment, as can be seen from Figure 6 the present embodiment system
Standby TC4 titanium alloy rod bars mainly by isometric α tissues, platelet α structure and elongate α organizational compositions, while having a small amount of β tissues,
Illustrate that one fiery diameter forging keeps the deformation of blank tissue among TC4 titanium alloys more uniformly abundant, makes in the TC4 titanium alloys after upsetting pull
Between the collection harness defects of blank improved.
Embodiment 4
The preparation method of the present embodiment includes the following steps：
Step 1: by quality be 3200kg, a diameter of 700mm TA15 titan alloy casting ingots remove feeders and emit bottom, then
Alongst sawing is the TA15 titan alloy casting ingots that 3 quality are 1000kg, and the TA15 titaniums that quality is 1000kg are closed
Golden ingot casting first heating and thermal insulation 7h under conditions of 1150 DEG C, then carry out nine secondary upsettings nine of a fire piece by piece using 3000 tons of hydraulic presses and pull out
Forging obtains blank among TA15 titanium alloys after round as a ball；The TA15 titan alloy casting ingots meet GB/T26060-2010《Titanium and
Titan alloy casting ingot》Requirement；The pressure speed of 3000 tons of hydraulic presses is 1~2 time/min；The passage of forging is pulled out in nine upsetting nine
Deflection is 30%, and the final forging temperature that forging is pulled out in nine upsetting nine is 800 DEG C；Blank is a diameter of among the TA15 titanium alloys
270mm；
Step 2: blank among the TA15 titanium alloys obtained in step 1 is carried out reconditioning processing, end and surface are removed
Crackle, fold the defects of；
Step 3: by being carried out under conditions of 500 DEG C through blank among reconditioning treated TA15 titanium alloy in step 2
2h is preheated and kept the temperature, 930 DEG C is then heated to and first keeps the temperature, then carries out the diameter forging of a fire time, and is aligned using diameter forging residual temperature
Processing, obtains TA15 titanium alloy bar stocks；It is clamped through blank among reconditioning treated TA15 titanium alloy in the diameter forging process
Rotation moves radially, and is beaten by 4 tups on same cross section while blank moves radially among TA15 titanium alloys, returns
Circle necking deformation is until forging size；Wherein, the angle in 4 tups between two neighboring tup is 90 °, the rotation
Speed be 30r/min；The total deformation of the diameter forging of one fire time is 45%；
Step 4: the TA15 titanium alloys bar stock obtained in step 3 is carried out annealing 2h under conditions of 800 DEG C, so
It is air-cooled afterwards and using annealing residual temperature aligned, obtain TA15 titanium alloy rod bars；The TA15 titanium alloy rod bars it is a diameter of
200mm。
After testing, the room-temperature mechanical property of TA15 titanium alloy rod bars manufactured in the present embodiment see the table below 4.
The room-temperature mechanical property of TA15 titanium alloy rod bars prepared by 4 embodiment 4 of table
As shown in Table 4, the room-temperature mechanical property of TA15 titanium alloy rod bars manufactured in the present embodiment meets GB/T2965-2007
《Titanium or titanium alloy bar》In requirement, illustrate that the preparation method of the present invention while reducing base and diameter and forging number, ensures
The mechanical properties of product TA15 titanium alloy rod bars.
Fig. 7 is the micro-organization chart of blank among TA15 titanium alloys manufactured in the present embodiment, as can be seen from Figure 7 this implementation
Blank mainly by isometric α, sheet α and elongates α organizational compositions among TA15 titanium alloys prepared by example, and part α organizes coarse, explanation
It is still insufficient although making the crystal grain in TA15 titanium alloy tissues be refined and be crushed through excessive deformation upsetting pull forging.
Fig. 8 is the micro-organization chart of TA15 titanium alloy rod bars manufactured in the present embodiment, as can be seen from Figure 8 the present embodiment system
Standby TA15 titanium alloy rod bars mainly by isometric α, sheet α and elongate α organizational compositions, while having a small amount of β tissues, illustrate a fire
Secondary diameter forging keeps the deformation of blank tissue among TA15 titanium alloys more uniformly abundant, makes blank among the TA15 titanium alloys after upsetting pull
Tissue gross defects improved.
Embodiment 5
The preparation method of the present embodiment includes the following steps：
Step 1: be 3200kg by quality, the TA2 titan alloy casting ingots remove feeders of a diameter of 700mm and emit bottom, then edge
It is the TA2 titan alloy casting ingots that 3 quality are 1000kg length direction sawing, by the TA2 titanium alloy castings that quality is 1000kg
Ingot first heating and thermal insulation 7h under conditions of 1070 DEG C, then carry out nine secondary upsettings nine of a fire piece by piece using 3000 tons of hydraulic presses and pull out, it passes through
Blank among TA2 titanium alloys is obtained after round as a ball；The TA2 titan alloy casting ingots meet GB/T 26060-2010《Titanium or titanium alloy is cast
Ingot》Requirement；The pressure speed of 3000 tons of hydraulic presses is 1~2 time/min；The pass deformation that forging is pulled out in nine upsetting nine is
30%, the final forging temperature that nine upsetting nine is pulled out is 800 DEG C；A diameter of 270mm of blank among the TA2 titanium alloys；
Step 2: the TA2 titanium alloys centre blank progress reconditioning processing that will be obtained in step 1, removal end and surface
The defects of crackle, folding；
Step 3: by being carried out under conditions of 500 DEG C in advance through blank among reconditioning treated TA2 titanium alloy in step 2
Heat simultaneously keeps the temperature 2h, is then heated to 840 DEG C and first keeps the temperature, then carries out the diameter forging of a fire time, and is carried out at aligning using diameter forging residual temperature
Reason, obtains TA2 titanium alloy bar stocks；Through the clamped rotation of blank among reconditioning treated TA2 titanium alloy in the diameter forging process
It moves radially, is beaten by 4 tups on same cross section while blank moves radially among TA2 titanium alloys, return round contracting
Diameter deformation is until forging size；Wherein, the angle in 4 tups between two neighboring tup is 90 °, the speed of the rotation
Degree is 30r/min；The total deformation of the diameter forging of one fire time is 45%；
Step 4: the TA2 titanium alloys bar stock obtained in step 3 is carried out annealing 2h under conditions of 700 DEG C, so
It is air-cooled afterwards and using annealing residual temperature aligned, obtain TA2 titanium alloy rod bars；The TA2 titanium alloy rod bars it is a diameter of
200mm。
After testing, the room-temperature mechanical property of TA2 titanium alloy rod bars manufactured in the present embodiment see the table below 5.
The room-temperature mechanical property of TA2 titanium alloy rod bars prepared by 5 embodiment 5 of table
As shown in Table 5, the room-temperature mechanical property of TA2 titanium alloy rod bars manufactured in the present embodiment meets GB/T2965-2007
《Titanium or titanium alloy bar》In requirement, illustrate that the preparation method of the present invention while reducing base and diameter and forging number, ensures
The mechanical properties of product TA2 titanium alloy rod bars.
Fig. 9 is the micro-organization chart of blank among TA2 titanium alloys manufactured in the present embodiment, as can be seen from Figure 9 this implementation
Blank is mainly by coarse α organizational compositions among TA2 titanium alloys prepared by example, although illustrating to make through excessive deformation upsetting pull forging
Crystal grain in TA2 titanium alloy tissues is refined and is crushed, but still insufficient.
Figure 10 is the micro-organization chart of TA2 titanium alloy rod bars manufactured in the present embodiment, as can be seen from Figure 10 the present embodiment
The TA2 titanium alloy rod bars of preparation illustrate that one fire time diameter forging of explanation makes in TA2 titanium alloys mainly by the isometric α organizational compositions refined
Between blank tissue deformation more uniformly fully, so that the tissue gross defects of blank among the TA2 titanium alloys after upsetting pull is changed
It is kind.
The above is only presently preferred embodiments of the present invention, is not imposed any restrictions to the present invention.It is every according to invention skill
Art essence still falls within technical solution of the present invention to any simple modification, change and equivalence change made by above example
Protection domain in.
Claims (4)
1. a kind of method producing α, nearly α or alpha+beta titanium alloys bar, which is characterized in that this approach includes the following steps：
Step 1: titan alloy casting ingot is carried out heating and thermal insulation more than transformation temperature under conditions of 160 DEG C, a fire time is then carried out
Upsetting pull is forged, and blank among titanium alloy is obtained after round as a ball；The titan alloy casting ingot is alpha titanium alloy ingot casting, near αtitanium alloy ingot casting
Or alpha+beta titanium alloys ingot casting, the titan alloy casting ingot meet GB/T 26060-2010《Titanium and titanium alloy ingot casting》Requirement；It is described
Upsetting pull is forged to the forging that nine upsettings nine are pulled out, and the final forging temperature of the upsetting pull forging is not less than 200 DEG C below transformation temperature；The titanium closes
A diameter of 150mm~270mm of golden intermediate blank；
Step 2: blank among the titanium alloy obtained in step 1 is carried out reconditioning processing, crackle, the folding of end and surface are removed
The defects of folded；
Step 3: by step 2 through blank among reconditioning treated titanium alloy below transformation temperature under conditions of 500 DEG C into
Row, which preheats, simultaneously to be kept the temperature, and is then heated under conditions of 70 DEG C of transformation temperature or less and is first kept the temperature, then carries out a fire using diameter forging machine group
Diameter forging, and using diameter forging residual temperature progress straightening processing, obtain titanium alloy bar stock；Through reconditioning, treated in the diameter forging process
The clamped rotation of blank moves radially among titanium alloy, while blank moves radially among titanium alloy on same cross section
Beaten by 4 tups, returns round necking deformation until forging size；Wherein, the folder in 4 tups between two neighboring tup
Angle is 90 °, and the speed of the rotation is 30r/min；The total deformation of the diameter forging of one fire time is not less than 45%；
Step 4: the titanium alloy bar stock obtained in step 3 is made annealing treatment, and aligned, is obtained using annealing residual temperature
Titanium alloy rod bar；The room-temperature mechanical property of the titanium alloy rod bar meets GB/T2965-2007《Titanium or titanium alloy bar》Want
It asks.
2. a kind of method producing α, nearly α or alpha+beta titanium alloys bar according to claim 1, which is characterized in that step 1
Described in titan alloy casting ingot a diameter of 500mm~700mm, a diameter of 50mm of titanium alloy rod bar described in step 4~
200mm。
3. a kind of method producing α, nearly α or alpha+beta titanium alloys bar according to claim 1, which is characterized in that step 1
Described in titan alloy casting ingot quality be 500kg~1000kg.
4. a kind of method producing α, nearly α or alpha+beta titanium alloys bar according to claim 1, which is characterized in that step 1
Described in upsetting pull forging pass deformation be not less than 30%.
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