CN106862863A - A kind of preparation processing method of the ultra-thin titanium alloy shell of great diameter and long - Google Patents
A kind of preparation processing method of the ultra-thin titanium alloy shell of great diameter and long Download PDFInfo
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- CN106862863A CN106862863A CN201510920971.2A CN201510920971A CN106862863A CN 106862863 A CN106862863 A CN 106862863A CN 201510920971 A CN201510920971 A CN 201510920971A CN 106862863 A CN106862863 A CN 106862863A
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- titanium alloy
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- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The present invention relates to a kind of preparation processing method of the ultra-thin titanium alloy shell of great diameter and long, belong to non-ferrous metals processing field.The titanium alloy forging prefabricated punching of rod is prepared into band bottom cylinder or without bottom cylinder, extruding cylinder is prepared using backward extrusion；Machining obtains size and dimensional accuracy meets desired titanium alloy spinning blank；Processed through multi-pass spinning, the tissue of titanium alloy barrel body is improved using cold working and large deformation, obtain titanium alloy semi-finished product cylinder；Carry out intermediate annealing heat treatment；The finished product precision rotary pressing processing of multi-pass is carried out, acquisition meets the titanium alloy finished product housing of size requirement；Finished products treatment is carried out, mechanical property and the ultra-thin titanium alloy shell of the satisfactory great diameter and long of microstructure is obtained.The inventive method can produce the mass higher performance ultra-thin titanium alloy shell of more excellent great diameter and long, and can greatly improve the yield rate of thin-wall case.
Description
Technical field
The present invention relates to a kind of preparation processing method of the ultra-thin titanium alloy shell of great diameter and long, belong to non-ferrous metal and add
Work field.
Background technology
Titanium alloy shell has excellent combination property, and its density is small, and specific strength is high, and fatigue strength and anti-crack expand
Exhibition ability is good, and etch resistant properties are excellent, and welding performance is good etc., therefore in Aeronautics and Astronautics, automobile, shipbuilding, energy
The industries such as source have increasingly extensive application prospect.
During by blank to housing finished product, processing method is mainly spinning and rolling to titanium alloy.Rolling is carried
The stress state of confession is adapted to the plastic deformation of metal cylinder, can produce that intensity is high, and the poor titanium alloy of plasticity
Seamless pipe, rolling drum surface quality and high precision, in the operation of rolling, external diameter decrement can reach respectively
To 40%, preferable forming effect is obtained, obtain working modulus higher, but be adapted to the production of narrow tube, it is difficult
To process the ultra-thin housing of great diameter and long.
The content of the invention
It is an object of the invention to provide a kind of ultra-thin titanium alloy shell processing technology of preparation method of great diameter and long, category
In technical field of nonferrous metal processing.There is good application prospect in fields such as space flight and aviation.
A kind of ultra-thin titanium alloy shell of great diameter and long prepares processing method, and its technique is comprised the following steps：
(1) according to the specification of finished product housing, selection titanium alloy forging rod prepares the titanium alloy forging prefabricated punching of rod
With bottom cylinder or without bottom cylinder, extruding cylinder is prepared using backward extrusion；
(2) the extruding cylinder that step (1) is obtained is machined out, obtains size and dimensional accuracy meets requirement
Titanium alloy spinning blank；
(3) the titanium alloy spinning blank that step (2) machining is obtained is carried out into multi-pass shear spinning processing, profit
Improve the tissue of titanium alloy barrel body with cold working and large deformation, obtain titanium alloy semi-finished product cylinder；
(4) the titanium alloy semi-finished product cylinder that step (3) is obtained is carried out into intermediate annealing heat treatment；
(5) the titanium alloy semi-finished product cylinder of the annealing for obtaining step (4) carries out the finished product of multi-pass in spinning machine
Accurate rotary pressing processing, acquisition meets the titanium alloy finished product housing of size requirement；
(6) the titanium alloy finished product housing being of the required size that step (5) is obtained is carried out into finished products treatment,
Obtain mechanical property and the ultra-thin titanium alloy shell of the satisfactory great diameter and long of microstructure.
Further, step (3) and step (4) can be carried out alternately and repeatedly, the titanium alloy half that acquisition has been annealed into
Product cylinder.
In above-mentioned preparation processing method, the titanium alloy shell include without bottomless drum shape housing, band bottomless drum shape housing,
Without bottom special-shaped shell body and band bottom special-shaped shell body.
A diameter of 200~600mm of the titanium alloy spinning blank, thickness is 7~12mm；Prepare semi-finished product cylinder
Shi Jinhang multi-pass flow turnings, passage reduction is 10~45%, and feed ratio is 0.5~2.5mm/r, multi-pass rotation
Semi-finished product cylinder of the thickness in 1.5~3mm is obtained after pressure, and obtains large deformation tissue.
Semi-finished product cylinder prepared by the spinning is incubated 1~1.5h, in carrying out at 600~850 DEG C under vacuum condition
Between annealing softening treatment.
The semi-finished product cylinder of annealing is carried out into finished product precision spinning, finished product housing precision spinning pass reduction is
10~45%, feed ratio is 0.5~2.0mm/r, and acquisition meets the high-quality finished product cylinder of size requirement.
The ultra-thin titanium alloy shell of great diameter and long after the spinning carries out finished product vacuum annealing treatment, and annealing temperature is
650 DEG C~850 DEG C, the time is 0.5~1.5h.
In 200mm~600mm, length exists the ultra-thin finished product diameter of the housing of great diameter and long in 2~5m, thickness
Between 0.5mm~2mm.
Beneficial effects of the present invention：
1st, deformed using backward extrusion, extruding force is small, and energy consumption is low, the titanium alloy extruding that can carry out large deformation becomes
Shape；
2nd, blank prepared by backward extrusion realizes microstructure homogenization and crystal grain refinement, with good forming property；
3rd, using spin forming technique, by the cooperation of passage reduction, feed ratio and intermediate heat-treatment,
Realize effective control of material flow stability and deformation uniformity in spinning process, it is to avoid cracking, bulge and
The generation of the defect such as expanding；
4th, preparation process forming technology is simple, and operation is few.
The ultra-thin titanium alloy shell of great diameter and long of processing is prepared using this method, technological process is short, and steady quality can
Lean on, fine uniform tissue, mechanical property and combination property can be obtained and meet desired great diameter and long ultra-thin titanium conjunction
Golden shell body, and the yield rate of housing can be greatly improved, the row such as product Aeronautics and Astronautics, automobile, shipbuilding, energy
Industry, with increasingly extensive application prospect and certain has an economic benefit.
Brief description of the drawings
Fig. 1 is present invention process flow chart；
Fig. 2 is the large-diameter seamless TA1 titanium alloys of embodiment 1 without bottomless drum shape housing；
Fig. 3 is the large-diameter seamless TA3 Ti Alloy Strip bottomless drum shape housings of embodiment 2；
Fig. 4 is the large-diameter seamless TB2 titanium alloys of embodiment 3 without bottom special-shaped shell body；
Fig. 5 is the large-diameter seamless TC4 Ti Alloy Strips bottom special-shaped shell body of embodiment 4.
Specific embodiment
The present invention provides a kind of ultra-thin titanium alloy shell of great diameter and long and prepares processing method, below in conjunction with the accompanying drawings to this
Invention is further illustrated.
As shown in figure 1, present invention process flow includes forging bar, punching prefabricated band bottom cylinder or without bottom cylinder,
Prepared by backward extrusion, spinning blank, accurate mould pressing, finished products.
(1) bar, punching prefabricated band bottom cylinder are forged or without bottom cylinder and backward extrusion：According to finished product shell
The specification of body, selects the titanium alloy forging rod of appropriate length, external diameter, after forging rod heating, titanium alloy forging rod is prefabricated
Band bottom cylinder (or without bottom cylinder) is prepared in punching, and external diameter is 200~600mm；Prepared using backward extrusion
Go out to extrude cylinder；Cylinder can be the cylindrical tube or special-shaped shell body of rule.
(2) prepared by spinning blank：Step (1) is extruded into cylinder by obtaining size and dimensional accuracy after machining
Meet desired titanium alloy spinning blank, a diameter of 200~600mm, thickness is 7~12mm.
(3) the spinning blank that step (2) machining is obtained is carried out into multi-pass shear spinning processing, is added using cold
Work and large deformation improve the tissue of titanium alloy barrel body, and passage reduction is 10~45%, and feed ratio is 0.5~2.5mm/r,
Obtain titanium alloy semi-finished product cylinder.
(4) the titanium alloy spinning semi-finished product cylinder that step (3) is obtained is carried out into intermediate heat-treatment annealing, annealing temperature
At spending for 600~850 DEG C, 1~1.5h is incubated in vacuum drying oven, carries out annealing softening treatment.
(5) step (3) and (4) are alternately and repeatedly carried out, thickness is obtained after multi-pass spinning in 1.5~3mm
Titanium alloy semi-finished product cylinder, and obtain large deformation tissue.
(6) accurate mould pressing：The titanium alloy semi-finished product cylinder of the annealing that step (5) is obtained enters in spinning machine
The finished product precision rotary pressing processing of row multi-pass, spinning pass reduction is 10~45%, and feed ratio is 0.5~2.0mm/r,
Acquisition meets size and dimensional accuracy meets desired high-quality titanium alloy finished product housing, and diameter exists
200mm~600mm, in 2~5m, thickness is between 0.5mm~2mm for length.
(7) finished products：The titanium alloy finished product housing being of the required size that step (6) is obtained is carried out into finished product
Annealing, annealing temperature is 650 DEG C~850 DEG C, and the time is 0.5~1.5h, obtains mechanical property and microstructure
The satisfactory ultra-thin titanium alloy shell of great diameter and long.
Embodiment 1：Preparing specification isSpinning large-diameter seamless TA1 titanium alloys are without bottomless drum shape
Housing
The forging prefabricated punching of rod of TA1 titanium alloys is prepared without bottom cylinder, recipient is prepared using backward extrusion
Body；Extrude cylinder is by obtaining size after machiningSpinning blank, base
Material outside dimension precision is ± 0.05mm, and wall thickness dimension precision is ± 0.04mm.The spinning blank for obtaining will be machined
Multi-pass shear spinning processing is carried out, the first passage reduction is 35%, and the second passage and the 4th road reduction are
40%, the 3rd passage reduction is 45%, and the first passage feed ratio is 0.8mm/r, and three passage feed ratios are afterwards
1.6mm/r, total deformation is 85%, obtains titanium alloy semi-finished product cylinder size and isRotation
Pressure semi-finished product cylinder carries out intermediate heat-treatment annealing, and annealing temperature is 650 DEG C, and 0.6h is incubated in vacuum drying oven, is carried out
Annealing softening treatment.Finished product spinning is carried out after annealing, the first passage reduction is 35%, and two passages are thinning afterwards
Rate is 45%, and the first passage feed ratio is 0.8mm/r, and the second passage feed ratio is 1.6mm/r, the 3rd road finished product essence
Close spinning feed ratio is 0.6mm/r, and spinning obtains titanium alloy finished product cylinder size and isWill
Titanium alloy finished product cylinder carries out finished products treatment, and annealing temperature is 650 DEG C, and the time is 1h, and tapping temperature is not high
In 150 DEG C, annealing post-processing hardening is eliminated, and tissue stabilization, plasticity is improved, and housing microstructure is tiny equiaxial
Crystalline substance tissue, tensile strength is 400~500MPa, and elongation after fracture is that 25~35%, Fig. 2 is its longitudinal sectional drawing.
Embodiment 2：Preparing specification isSpinning large-diameter seamless TA3 Ti Alloy Strip bottomless drum shape shells
Body
Band bottom cylinder is prepared into the forging prefabricated punching of rod of TA3 titanium alloys, cylinder is by obtaining size after machiningSpinning blank, blank outside dimension precision is ± 0.05mm, wall thickness dimension
Precision is ± 0.04mm.The spinning blank for obtaining will be machined carries out multi-pass shear spinning processing, and the first passage subtracts
Thin rate is 30%, and the second passage and the 4th road reduction are 40%, and the 3rd passage reduction is 45%, the first passage
Feed ratio is 0.8mm/r, and three passage feed ratios are 2mm/r afterwards, and total deformation is 81.7%, obtain titanium alloy half into
Product cylinder size isSpinning semi-finished product cylinder carries out intermediate heat-treatment annealing, annealing temperature
It is 650 DEG C, 1h is incubated in vacuum drying oven, carries out annealing softening treatment.Finished product spinning, first are carried out after annealing
Passage reduction is 30%, and three passage reductions are 40% afterwards, and the first passage feed ratio is 0.8mm/r, second
Secondary and the 3rd passage feed ratio is 2mm/r, and last one finished product precision spinning feed ratio is 0.6mm/r, and spinning is obtained
It is to titanium alloy finished product shell dimensionTitanium alloy finished product housing is carried out at finished products
Reason, annealing temperature is 650 DEG C, and the time is 1.5h, and tapping temperature is not higher than 150 DEG C, and annealing post-processing hardening disappears
Remove, tissue stabilization, plasticity is improved, housing microstructure is tiny equiaxed grain structure, tensile strength is
550~600MPa, elongation after fracture is that 15~25%, Fig. 3 is its longitudinal sectional drawing.
Embodiment 3：The seamless TB2 alloy special-shaped titaniums of spinning are prepared without bottom shell body
The forging prefabricated punching of rod of TB2 titanium alloys is prepared without bottom cylinder, cylinder is by obtaining size after machiningSpinning blank, blank outside dimension precision is ± 0.05mm, wall thickness dimension
Precision is ± 0.04mm.The spinning blank for obtaining will be machined carries out multi-pass shear spinning processing, and the first passage subtracts
Thin rate is 30%, and three road reductions are 40% afterwards, and the first passage feed ratio is 0.8mm/r, afterwards three passage feed ratios
It is 1.5mm/r, total deformation is 75%, obtaining titanium alloy semi-finished product cylinder size isRotation
Pressure semi-finished product cylinder carries out intermediate heat-treatment annealing, and annealing temperature is carried out at 800 DEG C, 1h to be incubated in vacuum drying oven
Annealing softening treatment.Finished product spinning is carried out after annealing, the first passage reduction is 30%, and the second passage is thinning
Rate is 40%, and the first passage feed ratio is 0.8mm/r, and the second passage feed ratio is 1.5mm/r, obtains shell dimension
For3rd passage and four-pass carry out shear spinning, are spun into reducing variable cross-section abnormity shell
Body, spinning obtains titanium alloy finished product housing minimum outer diameter and isMinimum wall thickness (MINI W.) is 1mm, and housing is maximum outer
Footpath isThickest is 2mm.Titanium alloy finished product housing is carried out into finished products treatment, annealing temperature
It is 800 DEG C, the time is 1.5h, tapping temperature is not higher than 150 DEG C, and annealing post-processing hardening is eliminated, tissue stabilization,
Plasticity is improved, and housing microstructure is tiny equiaxed grain structure, and tensile strength is 800~900MPa, elongation of having no progeny
Rate is that 15~20%, Fig. 4 is its longitudinal sectional drawing.
Embodiment 4：Prepare the seamless TC4 alloy special-shaped titaniums band bottom shell body of spinning
Band bottom cylinder is prepared into the forging prefabricated punching of rod of TC4 titanium alloys, cylinder is by obtaining size after machiningSpinning blank, blank outside dimension precision is ± 0.05mm, wall thickness dimension
Precision is ± 0.04mm.The spinning blank for obtaining will be machined carries out multi-pass shear spinning processing, and the first passage subtracts
Thin rate is 25%, and three road reductions are 30% afterwards, and the first passage feed ratio is 0.8mm/r, afterwards three passage feed ratios
It is 1.8mm/r, total deformation is 70%, obtaining titanium alloy semi-finished product cylinder size isRotation
Pressure semi-finished product cylinder carries out intermediate heat-treatment annealing, and annealing temperature is carried out at 800 DEG C, 1h to be incubated in vacuum drying oven
Annealing softening treatment.Finished product spinning is carried out after annealing, the first passage reduction is 25%, and the second passage is thinning
Rate is 30%, and the first passage feed ratio is 0.8mm/r, and the second passage feed ratio is 1.8mm/r, obtains shell dimension
For3rd passage and four-pass carry out shear spinning, are spun into reducing variable cross-section abnormity shell
Body, spinning obtains titanium alloy finished product housing minimum outer diameter and isMinimum wall thickness (MINI W.) is 1.2mm, and housing is most
Big external diameter isThickest is 2mm.Titanium alloy finished product housing is carried out into finished products treatment, is annealed
Temperature is 800 DEG C, and the time is 1.5h, and tapping temperature is not higher than 150 DEG C, and annealing post-processing hardening is eliminated, tissue
Stabilization, plasticity is improved, and housing microstructure is tiny equiaxed grain structure, and tensile strength is 8500~1050MPa,
Elongation after fracture is that 10~15%, Fig. 5 is its longitudinal sectional drawing.
Present invention process method realizes major diameter using forging titanium alloy rod bar by the processing step of several order
The ultra-thin titanium alloy shell of overlength preparation processing, including forging titanium alloy rod bar by punching prefabricated band bottom blank (or
Without bottom blank), backward extrusion, extrusion billet obtains spinning blank by finishing, and spinning blank is through excessive
The spinning of passage；Cylinder after spinning carries out semi-finished product vacuum annealing；Cylinder after annealing is again by the rotation of several passages
Pressure, forms finished product, and finished product titanium alloy shell carries out final finished product heat treatment, obtains fine uniform tissue, power again
Learn performance and combination property meets the desired ultra-thin titanium alloy shell of great diameter and long.The inventive method can be used to make
For without bottomless drum shape housing, band bottomless drum shape housing, without bottom special-shaped shell body and band bottom special-shaped shell body etc., housing is straight
In 200mm~600mm, in 2~5m, thickness is between 0.5mm~2mm for length in footpath.Production of the invention is big straight
The preparation processing method of the ultra-thin titanium alloy shell of footpath overlength, can produce the more excellent major diameter of mass higher performance and surpass
The ultra-thin titanium alloy shell of length, and the yield rate of thin-wall case can be greatly improved.
Claims (10)
1. a kind of ultra-thin titanium alloy shell of great diameter and long prepares processing method, comprises the following steps：
(1) the titanium alloy forging prefabricated punching of rod is prepared into band bottom cylinder or without bottom cylinder, using backward extrusion
Prepare extruding cylinder；
(2) the extruding cylinder that will be obtained is machined out, and obtains size and dimensional accuracy meets desired titanium alloy
Spinning blank；
(3) will machine the titanium alloy spinning blank for obtaining carries out multi-pass spinning processing, using cold working and greatly
Deformation improves the tissue of titanium alloy barrel body, obtains titanium alloy semi-finished product cylinder；
(4) titanium alloy semi-finished product cylinder is carried out into intermediate annealing heat treatment；
(5) the titanium alloy semi-finished product cylinder of annealing is carried out the finished product precision rotary pressing processing of multi-pass in spinning machine,
Acquisition meets the titanium alloy finished product housing of size requirement；
(6) described titanium alloy finished product housing is carried out into finished products treatment, obtains mechanical property and microstructure
The satisfactory ultra-thin titanium alloy shell of great diameter and long.
2. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, and its feature exists
In：Step (3) and step (4) are alternately and repeatedly carried out, and obtain the titanium alloy semi-finished product cylinder of annealing.
3. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, and its feature exists
In：Described titanium alloy shell is included without bottomless drum shape housing, band bottomless drum shape housing, without bottom special-shaped shell body and band
Bottom special-shaped shell body.
4. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, and its feature exists
In：A diameter of 200~600mm of described titanium alloy spinning blank, thickness is 7~12mm.
5. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, and its feature exists
In：Described titanium alloy spinning blank carries out multi-pass spinning processing, and passage reduction is 10~45%, feed ratio
It is 0.5~2.5mm/r.
6. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, and its feature exists
In：The thickness of described titanium alloy semi-finished product cylinder is 1.5~3mm.
7. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, and its feature exists
In：Described intermediate annealing heat treatment is at 600~850 DEG C, 1~1.5h to be incubated under vacuum condition.
8. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, and its feature exists
In：The passage reduction of described finished product precision rotary pressing processing is 10~45%, and feed ratio is 0.5~2.0mm/r.
9. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, and its feature exists
In：The temperature of described finished products treatment is 650 DEG C~850 DEG C, and the time is 0.5~1.5h.
10. the ultra-thin titanium alloy shell of great diameter and long according to claim 1 prepares processing method, its feature
It is：A diameter of 200mm~600mm of described titanium alloy finished product housing, length is 2~5m, and thickness is
0.5mm~2mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108213109A (en) * | 2017-12-18 | 2018-06-29 | 北京有色金属研究总院 | A kind of preparation method of great diameter and long thin-walled niobium and niobium alloy tubing |
| CN109256884A (en) * | 2017-10-13 | 2019-01-22 | 朱卫 | A kind of motor case produced with titanium |
| CN109274231A (en) * | 2017-10-13 | 2019-01-25 | 朱卫 | A kind of processing technology with titanium production motor case |
| CN110918752A (en) * | 2019-12-09 | 2020-03-27 | 哈尔滨工业大学 | Ti2Hot spinning forming method of AlNb-based alloy material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109256884A (en) * | 2017-10-13 | 2019-01-22 | 朱卫 | A kind of motor case produced with titanium |
| CN109274231A (en) * | 2017-10-13 | 2019-01-25 | 朱卫 | A kind of processing technology with titanium production motor case |
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