CN108015217A - A kind of upsetting extrusion method of bimetallic material cavity liner - Google Patents
A kind of upsetting extrusion method of bimetallic material cavity liner Download PDFInfo
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- CN108015217A CN108015217A CN201711284046.0A CN201711284046A CN108015217A CN 108015217 A CN108015217 A CN 108015217A CN 201711284046 A CN201711284046 A CN 201711284046A CN 108015217 A CN108015217 A CN 108015217A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/06—Shaping thick-walled hollow articles, e.g. projectiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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Abstract
The present invention provides a kind of preparation method of bimetallic material cavity liner, including upsetting squeeze combined shaping, the upsetting squeeze is that, by the crimp of 3~10 passages, every time deflection is 3~40% under the action of three-dimensional compressive stress and rate of deformation are 5~10mm/s.The present invention overcomes customary preparation methods obtain component surface quality is poor, internal grain size difference is big, the unequal technical barrier of stress distribution, control structural homogenity, wall thickness uniformity well, while also have the advantages that production efficiency is high, technology stability is good, is easily industrialized production.
Description
Technical field
The invention belongs to metal forming technology, specifically a kind of bimetal liner precision form field.
Background technology
Tantalum has high density, high dynamic ductility and excellent penetration property, can significantly improve invading under high burst hight
Thorough ability and antijamming capability, are one of ideal materials of rod-type jet stream (JPC), explosive formation projectiles (EFP) cavity liner.Tantalum material
It is the restricted link of cavity liner application that material cost, which remains high, and in order to reduce material cost, the penetration for lifting cavity liner is injured
Aftereffect, develops to have to ignite after penetration in recent years and injures the tantalum zirconium double metal material of aftereffect.
Show, both at home and abroad for the manufacturing technology of tantalum, tantalum alloy cavity liner, mainly have by consulting relevant documents and materials
Bar turnery processing, sheet stamping forming, mould pressing, pendulum are ground into shape, if Romero of University of Texas et al. is to Ta, Mo
Think after the research of materials plastic forming conical shell, the conical shell with micron crystalline substance can be obtained using strong spin forming technique
Body, surface-brightening, crystal grain fine size can accelerate conical shell jet stream Dynamic Recrystallization under detonative action, be conducive to increase
Strong jet stability and extension jet stream CuttingTime are (referring to Romero L A.The instability of rapidly
Stretching plastic jet [J], J.Appl.Phys., 1999,65,3006-3016)；Beijing non-ferrous metal research is total
Peng Haijian of institute et al. uses orbital forming technique, processes Ta-W alloy thin-wall revolving parts, and metal streamline is complete, in radiation
Shape, makes the performance of Thin-wall Revolving Part circumferential direction essentially identical, tantalum alloys zero (are good in average grain size≤50 μm referring to Peng Hai
The rotary roll technique [J] of part, rare metal, 2009,8,597-600).
Specific deficiency and shortcoming existing for these technologies：First, crowded defect is gnawed in bar turnery processing, tantalum knife easy to stick, formation,
And rough surface, and processing is extremely difficult, stock utilization is low, process-cycle length, only can guarantee that the shape and structure of part, it is impossible to
Improve interior tissue and performance；Second, sheet stamping forming texture anisotropy is big, interior tissue mixed crystal is serious, it is impossible to improves plate
The anisotropy of material rolling, while punching press belongs to partial plastic forming, tantalum and zirconium deformation are inconsistent, and geometry is not known, symmetry
Difference, size are unstable；Third, mould pressing part rough surface, dimensional accuracy are difficult to ensure that, while grain structure torsion resistance is big, edge
Cavity liner circumferential stress skewness, big along generatrix direction deflection difference, crystallite dimension is uneven, while finishing passes are answered
It is miscellaneous；It is only capable of obtaining definite shape structure blank fourth, pendulum is ground into shape, dimensional accuracy cannot meet that product finally makes with surface quality
With requiring, it is also necessary to which follow-up machining reaches dimension precision requirement.
The content of the invention
Present invention firstly provides a kind of upsetting extrusion method of bimetallic material cavity liner.
The present invention is realized by following technical proposal：
A kind of preparation method of bimetallic material cavity liner, including upsetting squeeze combined shaping, the upsetting squeeze is should in three-dimensional pressure
Under the action of power and rate of deformation are 5~10mm/s, by the crimp of 3~10 passages, every time deflection 3~
40%.
Preferably, in blank surface application of lubricating in the upsetting squeeze.Further, the cavity liner cone of the upsetting extrusion
Face, sphere circumference Wall-Thickness Difference≤0.1mm, surface roughness≤Ra0.2 μm.
The preparation method of above-mentioned bimetallic material cavity liner, further includes the heat treatment of the Static Recrystallization after upsetting squeeze, the heat
Handle 1000~1250 DEG C of holding temperature, 1~1.5h of soaking time, vacuum >=3 × 10-3Pa, then cool to 80~100 with the furnace
DEG C come out of the stove.
The preparation method of above-mentioned bimetallic material cavity liner, further includes the heat treatment of the homogenization before upsetting squeeze combined shaping, institute
State 700~900 DEG C of holding temperature, the 1~3h of soaking time of homogenization heat treatment, vacuum >=3 × 10-3Pa, then furnace cooling
Come out of the stove to 80~100 DEG C.
Preferably, above-mentioned bimetallic material is tantalum zirconia material.
A kind of preparation method of bimetallic material cavity liner, including upsetting squeeze combined shaping step and subsequent Static Recrystallization
Heat treatment, is realized by following process steps：
(1) preparation of blank：According to the spherical crown of design, segment, eccentric sub- hemisphere cavity liner shape and structure, original is calculated
The volume of material, and analyzed according to plastic working Forming Theory and nearly uniform plastic deformation principle, and numbered analog simulation, choosing
Suitable billet size is taken, corresponding tantalum zirconium billet size is cut according to volume of part invariance principle, the thickness 3 of tantalum zirconium plate~
7mm, 1: 1,1: 2,2: 1,3: the 1 grade different materials of thickness ratio of tantalum zirconium double metal material.
(2) homogenization heat treatment：Blank obtained by step (1) is put into vacuum heat treatment furnace and is carried out at homogenizing annealing
Reason, 700~900 DEG C of holding temperature, 1~3h of soaking time, vacuum >=3 × 10-3Pa, then cool to 80~100 DEG C with the furnace and go out
Stove, to obtain uniform tissue, and reduces the workhardness of material, improves the plastic formability of material.
(3) upsetting squeeze combined shaping：Blank obtained by step (2) is put into piece pre-forming die die cavity, in three-dimensional compressive stress
Under the action of being 5~10mm/s with rate of deformation, by the crimp of 3~10 passages, every time deflection is 3~40%
Between, one layer of lubricant of blank surface coating in forming process, the upsetting extrusion cavity liner conical surface, sphere circumference Wall-Thickness Difference≤
0.1mm, surface roughness≤Ra0.2 μm.
(4) dynamic recrystallization treatment：The upsetting extrusion cavity liner that step (3) obtains is put into vacuum heat treatment furnace, is kept the temperature
1000~1250 DEG C of temperature, 1~1.5h of soaking time, vacuum >=3 × 10-3Pa, then cool to 80~100 DEG C with the furnace and come out of the stove,
By Static Recrystallization make annealing treatment carry out crystal boundary optimization, and dislocation sliding, climb, make local dot matrix and crystal boundary planar orientation
Change, promote the formation of dynamic recrystallization and twin in annealing process, reduce work-hardening effect, and obtain having uniformly tiny
The cavity liner of annealing recrystallization institutional framework.
(5) blank obtained by step (4) is put into smart shaping dies die cavity, is 5 in three-dimensional compressive stress and rate of deformation
Under the action of~10mm/s, the crimp (blank rotates 90 DEG C or 180 DEG C) by 1~4 passage, every time deflection exists
0.5~3%；The cavity liner conical surface, sphere circumference Wall-Thickness Difference≤0.07mm, surface roughness≤Ra0.2 μm.
The Extrusion Forging Deformation of 3~10 passages in the step (3), according to the caliber size of cavity liner, coning angle, wall thickness, ball
The processes such as the shape and structure feature such as radius surface, the rolling pass of design, dimensions is small, the part deformation road of simple shape
Secondary few, identical bore cavity liner spherical cap shape is fewer than the rolling pass of segment-shaped, eccentric sub- hemisphere, while zirconium in bimetallic material
Ratio large deformation passage also reduce.
Deflection is 3~40% in the step (3), according to rolling pass and design of part feature, reasonable distribution per pass
Secondary deflection, reduces with the increase deflection of rolling pass, passes through the Plastic Forming of ladder deformation amount controlling cavity liner.
In lubricant in the step (3), including the conventional lubricants such as tea oil, fine oil, castor oil, rapeseed oil it is a kind of or
Several mixing, are coated on blank surface in every time forming process, reduce the frictional force between blank and mould contact surface, improve
The mobility of metal in forming process, and improve the surface quality of formed parts.
The crimp of 1~4 passage in the step (5), according to the shape and structure of cavity liner, the conical surface, sphere circumferential wall
Thick difference determines.
Beneficial effect
Cavity liner of the present invention has hyperboloid space structure, and dimensional accuracy, surface quality requirements are high, and the present invention passes through upsetting squeeze
Accumulating plastic deformation and front and rear process modification realize geomery, structure property, the multiple control of surface quality.
The present invention uses the accumulation control Technology of Large Deformation of upsetting squeeze combined shaping, and combines recrystallization annealing and be heat-treated,
Distortional stress and accumulation strain effect during upsetting squeeze composite deformation promote the refinement of the wrong row of the stacking of material internal and crystal grain,
Promote the formation of dynamic recrystallization, twin by annealing heat treatment process again, obtain uniform, tiny equiaxed grain structure structure, be
The development of bimetallic material cavity liner provides a kind of new preparation method.
The present invention overcomes customary preparation methods obtain component surface quality is poor, internal grain size difference is big, stress point
The unequal technical barrier of cloth, controls structural homogenity, wall thickness uniformity well, while also steady with production efficiency height, technique
It is qualitative it is good, be easily industrialized the advantages that production.
(1) stock utilization is high.Processing is not stayed using outer mold surface in the segment cavity liner of upsetting squeeze combined shaping method production
Surplus, stock utilization reach 95%, can significantly improve shaped charge material utilization rate.
(2) drip molding good product performance.The cavity liner produced using upsetting squeeze combined shaping method, its metallic fiber is along part
Contour shape is distributed, and continuous fine and close, is handled by recrystallization annealing, is obtained the isometric fine grained texture of low-stress state；Medicine at the same time
Outer mold surface is not processed in type cover, overcomes the influence that turning tool marks form jetting penetrator, solid jet.
(3) part size of product uniformity is good.The surfaces externally and internally of the cavity liner of upsetting squeeze combined shaping method production is thick
Rugosity, circumference Wall-Thickness Difference etc. ensure that external interference factor is small by mold tooling system, while shaping dies service life is grown,
Thus the uniformity of part size of product is good.
(4) realize that part product quality effectively controls.By to works such as rolling pass, deflection, annealing temperature and times
The narrow specifications control of skill parameter, obtains required institutional framework, realizes the Validity control of product quality, improves the consistent of product
Property, stability.
Brief description of the drawings
Tissue after Fig. 1 tantalum zirconium double metal homo genizing annelaings
Fig. 2 upsetting extrusion process charts
Fig. 3 segment-shaped cavity liners
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of preparation method of bimetallic material cavity liner, follows the steps below：
(1) preparation of blank：By taking the Uneven thickness cover of segment shape and structure as an example, cavity liner caliber size is 100mm,
Ectosphere radius surface 110mm, inner sphere radius 132mm, 27 ° of cone angle；According to plastic working Forming Theory and nearly uniform plastic deformation
Principle, stays 3mm allowance cavity liner caliber size flange position is unilateral, and designs φ in cavity liner sphere centre bottom
The positioning convex point of 4mm；Sunykatuib analysis and optimization are carried out to forming process using UG, DEFORM software, and calculate the body of blank
Product, chooses the tantalum zirconium double metal material of 4mm thickness (thickness ratio of tantalum zirconium is 3: 1).
(2) homogenization heat treatment：By blank obtained by step (1) in VQG-2500 type intelligent temperature control vacuum heat treatment furnaces
When 750 ± 5 DEG C of insulations 1 are small, vacuum is (1.5~2.5) × 10-3Pa, cools to 80 DEG C with the furnace after insulation heat treatment and comes out of the stove.
Material structure is than more uniform after homogenizing annealing, and hardness is less than 60HB, and average grain size is about 60 μm, as shown in Figure 1.
(3) upsetting squeeze combined shaping：Blank obtained by step (2) is put into extrusion die die cavity, in three-dimensional compressive stress and
Under certain rate of deformation effect, by the crimp of 8 passages, segment shape cavity liner component, forming process such as Fig. 2 are obtained
Shown, every time deformation distribution is as shown in table 1.Upsetting extrusion mould includes die system, punch-pin system, ejection system, upsetting
The hydraulic press that former is 1600 tons is squeezed, the rate of deformation of hydraulic press can arbitrarily be adjusted in 5~10mm/s, extrusion die
Die system be installed on hydraulic press work top on, ejection system is connected with the ejecting mechanism of hydraulic press, punch-pin system and
The work sliding block of hydraulic press is connected, and drives extruding punch to carry out extrusion molding, extruding punch by the work sliding block of hydraulic press
Coordinating with Extruding die makes blank be in three-dimensional stress state.1st passage forms centering position for blank, and ensures blank surrounding
It is evenly distributed, deflection is larger；Follow-up 2-7 passages upsetting extrusion (deflection≤30%), makes the wall portion of cavity liner gradually be thinned,
With extruding passage increase work-hardening effect enhancing, deflection is gradually reduced；Last 1 passage accurately controls for base thickness, improves
The dimensional accuracy and dimensional stability of drip molding, deflection is generally≤5%.After Extrusion Forging Deformation, shape, ruler needed for acquisition
Very little, surface quality and the cavity liner with certain mechanical property, the conical surface, sphere circumference Wall-Thickness Difference≤0.1mm, surface roughness
≤Ra0.2μm。。
The parameters such as 1 upsetting squeeze pass deformation of table
(4) dynamic recrystallization treatment：The cavity liner for the upsetting extrusion that step (3) is obtained is put into vacuum heat treatment furnace, is protected
1150 DEG C of temperature, soaking time 75min, vacuum (1.5~3) × 10-3Pa, then cool to 80 with the furnace and come out of the stove, by tying again
Crystalline substance annealing carries out crystal boundary optimization, and dislocation sliding, climb, change local dot matrix and crystal boundary planar orientation, promote to move back
The formation of dynamic recrystallization and twin during fire, reduces work-hardening effect, and obtains having uniform tiny annealing recrystallization
The cavity liner of institutional framework.
(5) blank obtained by step (4) is put into smart shaping dies die cavity, is 5 in three-dimensional compressive stress and rate of deformation
Under the action of~10mm/s, by the crimp of 4 passages, blank of extruding is rotated by 90 °, every time deformation distribution such as table
Shown in 2, the cavity liner after essence shaping is as shown in Figure 3.The conical surface, 0.02~0.045mm of sphere circumference Wall-Thickness Difference, surface are thick after testing
Rugosity Ra0.09~0.14 μm.
Table 2 extrudes the parameters such as finishing deformation amount
Embodiment 2
A kind of preparation method of bimetallic material cavity liner, follows the steps below：
(1) preparation of blank：By taking the Uneven thickness cover of eccentric sub- semi-spherical shape structure as an example, cavity liner caliber size is
139mm, ectosphere radius surface 140mm, inner sphere radius 145mm, 33 ° of cone angle；According to plastic working Forming Theory and nearly uniformly modeling
Property deformation principle, stays 4mm allowance cavity liner caliber size flange position is unilateral, and is set in cavity liner sphere centre bottom
Count the positioning convex point of φ 4mm；Sunykatuib analysis and optimization are carried out to forming process using UG, DEFORM software, and calculate blank
Volume, choose 6mm thickness tantalum zirconium double metal material (thickness ratio of tantalum zirconium be 2：1).
(2) homogenization heat treatment：By blank obtained by step (1) in VQG-2500 type intelligent temperature control vacuum heat treatment furnaces
When 850 ± 5 DEG C of insulations 1 are small, vacuum is (1.5~2.5) × 10-3Pa, carries out cooling to 80 DEG C with the furnace and after insulation heat treatment
Stove.Material structure is than more uniform after homogenizing annealing processing, and hardness is less than 60HB, and average grain size is about 70 μm.
(3) upsetting squeeze combined shaping：Blank obtained by step (2) is put into extrusion die die cavity, in three-dimensional compressive stress and
Under certain rate of deformation effect, by the crimp of 10 passages, segment shape cavity liner component, every time deflection are obtained
Distribution is as shown in table 3.Upsetting extrusion mould includes die system, punch-pin system, ejection system, and upsetting extrusion equipment is 1600 tons
Hydraulic press, the rate of deformation of hydraulic press can arbitrarily adjust in 5~10mm/s, and the die system of extrusion die is installed on hydraulic pressure
On the work top of machine, ejection system is connected with the ejecting mechanism of hydraulic press, the work sliding block phase of punch-pin system and hydraulic press
Connection, drives extruding punch to carry out extrusion molding, extruding punch coordinates with Extruding die makes base by the work sliding block of hydraulic press
Material is in three-dimensional stress state.1st passage for blank formed centering position, and ensure blank surrounding be evenly distributed, deflection compared with
Greatly；Follow-up 2-9 passages upsetting extrusion (deflection≤30%), makes the wall portion of cavity liner gradually be thinned, with extruding passage increase
Work-hardening effect strengthens, and deflection is gradually reduced；Last 1 passage accurately controls for base thickness, improves the dimensional accuracy of drip molding
With dimensional stability, deflection is generally≤5%.After Extrusion Forging Deformation, shape, size, surface quality and tool needed for acquisition
There are the cavity liner of certain mechanical property, the conical surface, sphere circumference Wall-Thickness Difference≤0.1mm, surface roughness≤Ra0.2 μm.
The parameters such as 3 upsetting squeeze pass deformation of table
(4) dynamic recrystallization treatment：The cavity liner for the upsetting extrusion that step (3) is obtained is put into vacuum heat treatment furnace, is protected
1200 DEG C of temperature, soaking time 90min, vacuum (1.5~3) × 10-3Pa, then cool to 80 with the furnace and come out of the stove, by tying again
Crystalline substance annealing carries out crystal boundary optimization, and dislocation sliding, climb, change local dot matrix and crystal boundary planar orientation, promote to move back
The formation of dynamic recrystallization and twin during fire, reduces work-hardening effect, and obtains having uniform tiny annealing recrystallization
The cavity liner of institutional framework.
(5) blank obtained by step (4) is put into smart shaping dies die cavity, is 5 in three-dimensional compressive stress and rate of deformation
Under the action of~10mm/s, by the crimp of 4 passages, 1 90 ° of blank spinning, every time deformation distribution such as table 4 are extruded
It is shown.The conical surface, 0.02~0.05mm of sphere circumference Wall-Thickness Difference, 0.08~0.18 μm of surface roughness Ra after testing.
Table 4 extrudes the parameters such as finishing deformation amount
Embodiment 3
A kind of preparation method of bimetallic material cavity liner, follows the steps below：
(1) preparation of blank：By taking the Uneven thickness cover of spherical cap shape structure as an example, cavity liner caliber size is 132mm,
Ectosphere radius surface 118mm, inner sphere radius 136mm；According to plastic working Forming Theory and nearly uniform plastic deformation principle, in medicine
Type cover caliber size flange position is unilateral to stay 3.5mm allowance, and in the positioning of cavity liner sphere centre bottom design φ 4mm
Salient point；Sunykatuib analysis and optimization are carried out to forming process using UG, DEFORM software, and calculate the volume of blank, chooses 5mm
Thick tantalum zirconium double metal material (thickness ratio of tantalum zirconium is 3: 2).
(2) homogenization heat treatment：By blank obtained by step (1) in VQG-2500 type intelligent temperature control vacuum heat treatment furnaces
When 900 ± 5 DEG C of insulations 1 are small, vacuum is (1.5~2.5) × 10-3Pa, carries out cooling to 80 DEG C with the furnace and after insulation heat treatment
Stove.Material structure is than more uniform after homogenizing annealing processing, and hardness is less than 60HB, and average grain size is about 55 μm.
(3) upsetting squeeze combined shaping：Blank obtained by step (2) is put into extrusion die die cavity, in three-dimensional compressive stress and
Under certain rate of deformation effect, by the crimp of 6 passages, segment shape cavity liner component, every time deflection are obtained
Distribution is as shown in table 5.Upsetting extrusion mould includes die system, punch-pin system, ejection system, and upsetting extrusion equipment is 1600 tons
Hydraulic press, the rate of deformation of hydraulic press can arbitrarily adjust in 5~10mm/s, and the die system of extrusion die is installed on hydraulic pressure
On the work top of machine, ejection system is connected with the ejecting mechanism of hydraulic press, the work sliding block phase of punch-pin system and hydraulic press
Connection, drives extruding punch to carry out extrusion molding, extruding punch coordinates with Extruding die makes base by the work sliding block of hydraulic press
Material is in three-dimensional stress state.1st passage for blank formed centering position, and ensure blank surrounding be evenly distributed, deflection compared with
Greatly；Follow-up 2-5 passages upsetting extrusion (deflection≤30%), makes the wall portion of cavity liner gradually be thinned, with extruding passage increase
Work-hardening effect strengthens, and deflection is gradually reduced；Last 1 passage accurately controls for base thickness, improves the dimensional accuracy of drip molding
With dimensional stability, deflection is generally≤5%.After Extrusion Forging Deformation, shape, size, surface quality and tool needed for acquisition
There are the cavity liner of certain mechanical property, the conical surface, sphere circumference Wall-Thickness Difference≤0.1mm, surface roughness≤Ra0.2 μm.
The parameters such as 5 upsetting squeeze pass deformation of table
(4) dynamic recrystallization treatment：The cavity liner for the upsetting extrusion that step (3) is obtained is put into vacuum heat treatment furnace, is protected
1100 DEG C of temperature, soaking time 75min, vacuum (1.5~3) × 10-3Pa, then cool to 80 with the furnace and come out of the stove, by tying again
Crystalline substance annealing carries out crystal boundary optimization, and dislocation sliding, climb, change local dot matrix and crystal boundary planar orientation, promote to move back
The formation of dynamic recrystallization and twin during fire, reduces work-hardening effect, and obtains having uniform tiny annealing recrystallization
The cavity liner of institutional framework.
(5) blank obtained by step (4) is put into smart shaping dies die cavity, is 5 in three-dimensional compressive stress and rate of deformation
Under the action of~10mm/s, by the crimp of 2 passages, 1 180 ° of blank spinning, every time deformation distribution such as table are extruded
Shown in 4.The conical surface, 0.03~0.07mm of sphere circumference Wall-Thickness Difference, 0.12~0.2 μm of surface roughness Ra after testing.
Table 6 extrudes the parameters such as finishing deformation amount
Claims (7)
1. a kind of preparation method of bimetallic material cavity liner, including upsetting squeeze combined shaping, the upsetting squeeze are in three-dimensional compressive stress
Under the action of being 5~10mm/s with rate of deformation, by the crimp of 3~10 passages, every time deflection is 3~40%.
2. the preparation method of bimetallic material cavity liner as claimed in claim 1, is coated with blank surface in the upsetting squeeze and lubricates
Agent.
3. the preparation method of bimetallic material cavity liner as claimed in claim 1 or 2, the cavity liner conical surface of the upsetting extrusion,
Sphere circumference Wall-Thickness Difference≤0.1mm, surface roughness≤Ra0.2 μm.
4. the preparation method of bimetallic material cavity liner, further includes the Static Recrystallization after upsetting squeeze as described in claim 1,2 or 3
Heat treatment, 1000~1250 DEG C of the holding temperature of heat treatment, 1~1.5h of soaking time, vacuum >=3 × 10-3Pa, then with stove
80~100 DEG C are cooled to come out of the stove.
5. the preparation method of bimetallic material cavity liner as described in claim 1-4 is any, before further including upsetting squeeze combined shaping
Homogenization heat treatment, 700~900 DEG C of the holding temperature of the homogenization heat treatment, 1~3h of soaking time, vacuum >=3 ×
10-3Pa, then cool to 80~100 DEG C with the furnace and come out of the stove.
6. the preparation method of bimetallic material cavity liner as described in claim 1-5 is any, the bimetallic material is tantalum zirconium material
Material.
7. the preparation method of bimetallic material cavity liner as claimed in claim 1, comprises the following steps：
（1）Cut the tantalum zirconium blank of corresponding size, 3~7mm of thickness of tantalum zirconium plate；
（2）Homogenization heat treatment：By step（1）Gained blank is put into progress homogenizing annealing processing in vacuum heat treatment furnace, protects
700~900 DEG C of temperature, 1~3h of soaking time, vacuum >=3 × 10-3Pa, then cool to 80~100 DEG C with the furnace and come out of the stove；
（3）Upsetting squeeze combined shaping：By step（2）The blank of gained is put into piece pre-forming die die cavity, in three-dimensional compressive stress and change
Shape speed be 5~10mm/s under the action of, by the crimp of 3~10 passages, every time deflection between 3~40%,
The blank surface application of lubricating in forming process, the upsetting extrusion cavity liner conical surface, sphere circumference Wall-Thickness Difference≤0.1mm, surface
Roughness≤Ra0.2 μm；
（4）Dynamic recrystallization treatment：By step（3）The upsetting extrusion cavity liner of acquisition is put into vacuum heat treatment furnace, holding temperature
1000~1250 DEG C, 1~1.5h of soaking time, vacuum >=3 × 10-3Pa, then cool to 80~100 DEG C with the furnace and come out of the stove；
（5）By step（4）The blank of gained is put into smart shaping dies die cavity, three-dimensional compressive stress and rate of deformation for 5~
Under the action of 10mm/s, by the crimp of 1~4 passage, every time deflection is 0.5~3%；The cavity liner conical surface, sphere
Circumference Wall-Thickness Difference≤0.07mm, surface roughness≤Ra0.2 μm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928738A (en) * | 2020-07-30 | 2020-11-13 | 南京理工大学 | Composite warhead device with adjustable damage power for killing broken armor |
| CN114134438A (en) * | 2021-11-30 | 2022-03-04 | 中国兵器工业第五九研究所 | Preparation method of fine-grain weak-texture tissue blank for shaped charge liner |
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| CN114134438A (en) * | 2021-11-30 | 2022-03-04 | 中国兵器工业第五九研究所 | Preparation method of fine-grain weak-texture tissue blank for shaped charge liner |
| CN114134438B (en) * | 2021-11-30 | 2022-05-27 | 中国兵器工业第五九研究所 | Preparation method of fine-grain weak-texture tissue blank for shaped charge liner |
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| CN108015217B (en) | 2019-07-09 |
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