CN106288979A - A kind of preparation method of cylindrical controlled fragment - Google Patents
A kind of preparation method of cylindrical controlled fragment Download PDFInfo
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- CN106288979A CN106288979A CN201610673586.7A CN201610673586A CN106288979A CN 106288979 A CN106288979 A CN 106288979A CN 201610673586 A CN201610673586 A CN 201610673586A CN 106288979 A CN106288979 A CN 106288979A
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- cylindrical
- controlled fragment
- diameter
- steel wire
- medium carbon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/34—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses the preparation method of a kind of cylindrical controlled fragment, the step of the method includes wire drawing die disconnected screening nickel plating detection warehouse-in of selecting materials.The present invention selects hardness to be 45～55HRC, tensile strength is 1670～1770MPa, the medium carbon steel steel wire of a diameter of 2mm is as raw material, cylindrical controlled fragment is by gravity, the action of air drag and wind-force there will be irregular deflection or upset, strong to the Penetration Ability of armor, cylindrical controlled fragment at a high speed is when penetration human body, after running into the resistance of tissue, in tissue, continuous overturning can occur, forming diameter in human body is several times of caliber, tens times even irregular cavity of tens times, the lethality caused is 47 times of common lamellar fragmentation.
Description
Technical field
The present invention relates to rupture disk technical field, particularly relate to the preparation method of a kind of cylindrical controlled fragment.
Background technology
Afield, as howitzer, sandy debris flow be hit enemy's Light armoured vehicle, tank fire point, low altitude flight thing with
And the Research on Target such as effective strength, it is to eliminate enemy, protection one's own side personnel and the maximally effective weapon of armored vehicle.Battlebus main
Threat derives from fragmentation kinetic energy damage and explosion wave injures two aspects, wherein, as the fragmentation of class such as howitzer, sandy debris flow
Formula warhead has taken into account the Kill capability of fragmentation and shock wave, is for hitting having of the Light armoured vehicles such as enemy's infantry fighting vehicles
Power weapons and ammunitions.Therefore, to improving the fragmentation damage power of warhead and the penetration effect of armour plate just being seemed the most necessary.
Fragmentation damage warhead is one of main Types of warhead, mainly by under high explosive detonation, is formed
A large amount of high speed fragments, utilize the high speed percussion of fragmentation, ignite and target is injured in ignition effect.May be used for killing effective strength
The weaponrys such as (people, animal), nothing plate armour or Light armoured vehicle, aircraft, radar and guided missile.
Controlled fragment is pre-machined molding, and the steel ball that shape and quality is pre-designed, steel arrow, tungsten ball, tungsten post etc. are prefabricated
Fragmentation is fabricated to controlled fragment body, and is arranged on outer surface or the inner surface of howitzer body.These controlled fragments and howitzer bullet
The natural fragmentation that body blast is formed collectively forms fragmentation damage field, and due to the concordance of controlled fragment flight resistance characteristic, band is pre-
The howitzer of fragmentation processed will have the fragmentation effect of comparatively dense, the lethal power of full bullet to have to carry largely in the range of setting
High.
Controlled fragment technology is widely used in various types of warhead.Cylindrical fragment fragmentation is more easy in atmosphere
Roll, and then it is the strongest to the Penetration Ability of armor to change the attitude of fragmentation and cylindricality fragmentation, be effectively improved strike enemy
The effect of side.
The defect of prior art and deficiency:
The most existing controlled fragment is mainly based on spherical fragmentation, and fragmentation is to roll, penetration weak effect.
2. the spherical fragmentation entrance of wound tract is little, and lethality is little.
Summary of the invention
The invention aims to solve shortcoming present in prior art, and a kind of cylindrical controlled fragment proposed
Preparation method.
To achieve these goals, present invention employs following technical scheme:
A kind of preparation method of cylindrical controlled fragment, step is as follows:
S1 selects materials: selection hardness is 45～55HRC, tensile strength is 1670～1770MPa, the medium carbon steel of a diameter of 2mm
Steel wire；
S2 wire drawing: the medium carbon steel steel wire in S1 step is put into and carries out wire drawing in metal drawing, by the middle carbon of 2mm diameter
Steel steel wire wire drawing becomes diameter to be equal to the cylindrical steel wire of finished diameter；
S3 mould breaks: the cylindrical steel wire die in S2 step is broken into the cylinder base that length is consistent by they spiral mould off line
Material；
S4 sieves: screening selected to the cylindrical blank in S3 step, and cylindrical blank dimensional discrepancy is exceeded ± 0.1mm
Stock screen out；
S5 nickel plating: use barrel plating mode that the cylinder stock after screening in S4 step is all covered nickel dam, obtain cylinder
Shape controlled fragment；
S6 detects: the cylindrical controlled fragment outward appearance in desk checking S5 step and size, inspection workman every 5～
10min makees an outward appearance and size examination at random, if finding defective work, from last time, examination at random must isolation processing to product when finding；
S7 puts in storage: pack warehouse-in in batches by inspecting qualified cylindrical controlled fragment in S6 step by random samples；
Medium carbon steel steel wire in described S1 step, its component weight percentages is:
C 0.42～0.50%, Cr 0～0.25%, Mn 0.50～0.80%；Ni 0～0.25%；P 0～
0.035%；S 0～0.035%；Si 0.17～0.37%；Nb 0.001%～0.002%, surplus is Fe.
Preferably, in described S3 step, the length of blank is consistent with the diameter of stock.
Preferably, in described S5 step, cylinder stock surface nickel layer thickness is 0.008～0.012mm.
Preferably, described medium carbon steel steel wire, its component weight percentages is:
C 0.44～0.48%, Cr 0.10～0.20%, Mn 0.60～0.70%；Ni 0.10～0.15%；P 0.01
～0.02%；S 0.01～0.02%；Si 0.20～0.30%；Nb 0.0012%～0.018%, surplus is Fe.
Preferably, described medium carbon steel steel wire, its component weight percentages is:
C 0.46%, Cr 0.125%, Mn 0.65%；Ni 0.125%；P 0.017%；S 0.017%；Si
0.27%；Nb 0.0015%, surplus is Fe.
Preferably, the finished diameter of described cylindrical controlled fragment is 1.6mm.
The invention have the advantage that the medium carbon steel steel that selecting hardness is 45～55HRC, tensile strength is 1670～1770MPa
Silk is as raw material, and owing to medium carbon steel hot-working and cutting ability are good, welding performance is poor, and intensity, hardness ratio mild steel are high,
And plasticity and toughness are less than mild steel, add rare earth niobium (Nb), owing to its small solid-state particle provides heterogeneous nucleus, or
Segregation on crystalizing interface, hinders structure cell and grows up, and refines for crystalline grain of steel and provides preferable thermodynamic condition, therefore rare earth niobium (Nb)
Add the solidified structure that can refine steel in steel, thus improve the performance of steel；Meeting when using RE-treated difference sulfur-bearing horizontal cast steel
Its coagulating property, macroscopic view and microscopic structure etc. are produced and significantly affects；The rare earth niobium (Nb) shadow to the crystalline structure of high-sulfur cast steel
Ringing mainly makes crystal grains fine, equiaxial crystal ratio improve, and its mechanism is that the compound of rare earth niobium (Nb) act as the non-spontaneous of crystallization
Core；The impact of low-sulfur cast steel crystalline structure is mainly shown as refining secondary dendrite arm spacing by rare earth niobium (Nb)；Use rare earth niobium
(Nb) the medium carbon steel steel wire made can ensure hardness and the tensile strength of finished product, strengthens the Penetration Ability of finished product, cylindrical prefabricated
The appearance of fragmentation is coated with the situation generation that nickel dam can effectively prevent from getting rusty, and extend the shelf life 2-3, and cylindrical controlled fragment is subject to
The action of gravity, air drag and wind-force there will be irregular deflection or upset, the penetration effect ratio of spinning projectile
Non-rotating bullet is good, is primarily due in Penetration, owing to rotary body has the effect of centrifugal force, makes object to spinning projectile
Penetration resistance less than non-rotating bullet, thus it is the most smaller to rotate the energy that penetration consumes, the penetration to armor
Ability is strong；Cylindrical controlled fragment at a high speed is when penetration human body, after running into the resistance of tissue, can occur even in tissue
Continuous upset, forming diameter in human body is several times of caliber, tens times even irregular cavity of tens times, and the lethality caused is
4-7 times of common lamellar fragmentation.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.
Instrument and equipment: JCJX-24B metal drawing, purchased from Jiangsu Jiacheng Mechine Co., Ltd.；AR G2 they spiral mould
Off line, purchased from TA company of the U.S..
Embodiment 1:
A kind of preparation method of cylindrical controlled fragment, step is as follows:
S1 selects materials: selection hardness is 45～55HRC, tensile strength is 1670MPa, the medium carbon steel steel wire of a diameter of 2mm；
S2 wire drawing: the medium carbon steel steel wire in S1 step is put into and carries out wire drawing in metal drawing, by the middle carbon of 2mm diameter
Steel steel wire wire drawing becomes diameter to be equal to the cylindrical steel wire of finished diameter；
S3 mould breaks: the cylindrical steel wire die in S2 step is broken into the cylinder base that length is consistent by they spiral mould off line
Material；
S4 sieves: screening selected to the cylindrical blank in S3 step, and cylindrical blank dimensional discrepancy is exceeded ± 0.1mm
Stock screen out；
S5 nickel plating: use barrel plating mode that the cylinder stock after screening in S4 step is all covered nickel dam, obtain cylinder
Shape controlled fragment；
S6 detects: the cylindrical controlled fragment outward appearance in desk checking S5 step and size, and inspection workman makees every 5min
Outward appearance and size examination at random, if finding defective work, from last time, examination at random must isolation processing to product when finding；
S7 puts in storage: pack warehouse-in in batches by inspecting qualified cylindrical controlled fragment in S6 step by random samples；
Medium carbon steel steel wire in described S1 step, its component weight percentages is:
Surplus is Fe.
In S3 step, the length of blank and the diameter of stock are consistent, and in S5 step, cylinder stock surface nickel layer thickness is
0.008mm, the finished diameter of cylindrical controlled fragment is 1.6mm.
Embodiment 2:
A kind of preparation method of cylindrical controlled fragment, step is as follows:
S1 selects materials: selection hardness is 50HRC, tensile strength is 1670MPa, the medium carbon steel steel wire of a diameter of 2mm；
S2 wire drawing: the medium carbon steel steel wire in S1 step is put into and carries out wire drawing in metal drawing, by the middle carbon of 2mm diameter
Steel steel wire wire drawing becomes diameter to be equal to the cylindrical steel wire of finished diameter；
S3 mould breaks: the cylindrical steel wire die in S2 step is broken into the cylinder base that length is consistent by they spiral mould off line
Material；
S4 sieves: screening selected to the cylindrical blank in S3 step, and cylindrical blank dimensional discrepancy is exceeded ± 0.1mm
Stock screen out；
S5 nickel plating: use barrel plating mode that the cylinder stock after screening in S4 step is all covered nickel dam, obtain cylinder
Shape controlled fragment；
S6 detects: the cylindrical controlled fragment outward appearance in desk checking S5 step and size, and inspection workman makees every 7min
Outward appearance and size examination at random, if finding defective work, from last time, examination at random must isolation processing to product when finding；
S7 puts in storage: pack warehouse-in in batches by inspecting qualified cylindrical controlled fragment in S6 step by random samples；
Medium carbon steel steel wire in described S1 step, its component weight percentages is:
Surplus is Fe.
In S3 step, the length of blank and the diameter of stock are consistent, and in S5 step, cylinder stock surface nickel layer thickness is
0.009mm, the finished diameter of cylindrical controlled fragment is 1.6mm.
Embodiment 3:
A kind of preparation method of cylindrical controlled fragment, step is as follows:
S1 selects materials: selection hardness is 45HRC, tensile strength is 1770MPa, the medium carbon steel steel wire of a diameter of 2mm；
S2 wire drawing: the medium carbon steel steel wire in S1 step is put into and carries out wire drawing in metal drawing, by the middle carbon of 2mm diameter
Steel steel wire wire drawing becomes diameter to be equal to the cylindrical steel wire of finished diameter；
S3 mould breaks: the cylindrical steel wire die in S2 step is broken into the cylinder base that length is consistent by they spiral mould off line
Material；
S4 sieves: screening selected to the cylindrical blank in S3 step, and cylindrical blank dimensional discrepancy is exceeded ± 0.1mm
Stock screen out；
S5 nickel plating: use barrel plating mode that the cylinder stock after screening in S4 step is all covered nickel dam, obtain cylinder
Shape controlled fragment；
S6 detects: the cylindrical controlled fragment outward appearance in desk checking S5 step and size, and inspection workman makees every 10min
Outward appearance and size examination at random, if finding defective work, from last time, examination at random must isolation processing to product when finding；
S7 puts in storage: pack warehouse-in in batches by inspecting qualified cylindrical controlled fragment in S6 step by random samples；
Medium carbon steel steel wire in described S1 step, its component weight percentages is:
Surplus is Fe.
In S3 step, the length of blank and the diameter of stock are consistent, and in S5 step, cylinder stock surface nickel layer thickness is
0.01mm, the finished diameter of cylindrical controlled fragment is 1.6mm.
Embodiment 4:
A kind of preparation method of cylindrical controlled fragment, step is as follows:
S1 selects materials: selection hardness is 55HRC, tensile strength is 1670MPa, the medium carbon steel steel wire of a diameter of 2mm；
S2 wire drawing: the medium carbon steel steel wire in S1 step is put into and carries out wire drawing in metal drawing, by the middle carbon of 2mm diameter
Steel steel wire wire drawing becomes diameter to be equal to the cylindrical steel wire of finished diameter；
S3 mould breaks: the cylindrical steel wire die in S2 step is broken into the cylinder base that length is consistent by they spiral mould off line
Material；
S4 sieves: screening selected to the cylindrical blank in S3 step, and cylindrical blank dimensional discrepancy is exceeded ± 0.1mm
Stock screen out；
S5 nickel plating: use barrel plating mode that the cylinder stock after screening in S4 step is all covered nickel dam, obtain cylinder
Shape controlled fragment；
S6 detects: the cylindrical controlled fragment outward appearance in desk checking S5 step and size, and inspection workman makees every 9min
Outward appearance and size examination at random, if finding defective work, from last time, examination at random must isolation processing to product when finding；
S7 puts in storage: pack warehouse-in in batches by inspecting qualified cylindrical controlled fragment in S6 step by random samples；
Medium carbon steel steel wire in described S1 step, its component weight percentages is:
Surplus is Fe.
In S3 step, the length of blank and the diameter of stock are consistent, and in S5 step, cylinder stock surface nickel layer thickness is
0.011mm, the finished diameter of cylindrical controlled fragment is 1.6mm.
Embodiment 5:
A kind of preparation method of cylindrical controlled fragment, step is as follows:
S1 selects materials: selection hardness is 52HRC, tensile strength is 1770MPa, the medium carbon steel steel wire of a diameter of 2mm；
S2 wire drawing: the medium carbon steel steel wire in S1 step is put into and carries out wire drawing in metal drawing, by the middle carbon of 2mm diameter
Steel steel wire wire drawing becomes diameter to be equal to the cylindrical steel wire of finished diameter；
S3 mould breaks: the cylindrical steel wire die in S2 step is broken into the cylinder base that length is consistent by they spiral mould off line
Material；
S4 sieves: screening selected to the cylindrical blank in S3 step, and cylindrical blank dimensional discrepancy is exceeded ± 0.1mm
Stock screen out；
S5 nickel plating: use barrel plating mode that the cylinder stock after screening in S4 step is all covered nickel dam, obtain cylinder
Shape controlled fragment；
S6 detects: the cylindrical controlled fragment outward appearance in desk checking S5 step and size, and inspection workman makees every 8min
Outward appearance and size examination at random, if finding defective work, from last time, examination at random must isolation processing to product when finding；
S7 puts in storage: pack warehouse-in in batches by inspecting qualified cylindrical controlled fragment in S6 step by random samples；
Medium carbon steel steel wire in described S1 step, its component weight percentages is:
Surplus is Fe.
In S3 step, the length of blank and the diameter of stock are consistent, and in S5 step, cylinder stock surface nickel layer thickness is
0.012mm, the finished diameter of cylindrical controlled fragment is 1.6mm.
To select hardness be 45～55HRC, tensile strength be the medium carbon steel steel wire of 1670～1770MPa as raw material, by
Good in medium carbon steel hot-working and cutting ability, welding performance is poor, and intensity, hardness ratio mild steel are high, and plasticity and toughness are low
In mild steel, add rare earth niobium (Nb), owing to its small solid-state particle provides heterogeneous nucleus or inclined on crystalizing interface
Poly-, hinder structure cell and grow up, provide preferable thermodynamic condition for crystalline grain of steel refinement, therefore can be thin in rare earth niobium (Nb) addition steel
Change the solidified structure of steel, thus improve the performance of steel；Use RE-treated difference sulfur-bearing horizontal cast steel time can to its coagulating property,
Macroscopic view and microscopic structure etc. produce and significantly affect；Rare earth niobium (Nb) mainly makes crystal grain to the impact of the crystalline structure of high-sulfur cast steel
Attenuate, equiaxial crystal ratio improves, and its mechanism is the heterogeneous necleus that the compound of rare earth niobium (Nb) act as crystallization；Rare earth niobium (Nb)
Impact on low-sulfur cast steel crystalline structure mainly shows as refining secondary dendrite arm spacing；Use the medium carbon steel that rare earth niobium (Nb) is made
Steel wire can ensure hardness and the tensile strength of finished product, strengthens the Penetration Ability of finished product, and the appearance of cylindrical controlled fragment is coated with nickel
Layer can effectively prevent the situation got rusty from occurring, and extend the shelf life 2-3, cylindrical controlled fragment by gravity, air drag and
There will be irregular deflection or upset in the action of wind-force, the penetration effect of spinning projectile is better than non-rotating bullet, main
If because in Penetration, owing to rotary body has the effect of centrifugal force, making object that the Penetration resistance of spinning projectile to be less than
Non-rotating bullet, thus the energy rotating penetration consumption is the most smaller, strong to the Penetration Ability of armor；Circle at a high speed
Cylindricality controlled fragment is when penetration human body, after running into the resistance of tissue, continuous overturning can occurs, in human body in tissue
Forming diameter is several times of caliber, tens times even irregular cavity of tens times, and the lethality caused is common lamellar fragmentation
4-7 times.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (6)
1. the preparation method of a cylindrical controlled fragment, it is characterised in that step is as follows:
S1 selects materials: selection hardness is 45～55HRC, tensile strength is 1670～1770MPa, the medium carbon steel steel wire of a diameter of 2mm；
S2 wire drawing: the medium carbon steel steel wire in S1 step is put into and carries out wire drawing in metal drawing, by the medium carbon steel steel of 2mm diameter
Silk wire drawing becomes diameter to be equal to the cylindrical steel wire of finished diameter；
S3 mould breaks: the cylindrical steel wire die in S2 step is broken into the cylindrical blank that length is consistent by they spiral mould off line；
S4 sieves: screening selected to the cylindrical blank in S3 step, and cylindrical blank dimensional discrepancy exceedes the ± embryo of 0.1mm
Material screen removes；
S5 nickel plating: use barrel plating mode that the cylinder stock after screening in S4 step is all covered nickel dam, obtains cylindrical pre-
Fragmentation processed；
S6 detects: the cylindrical controlled fragment outward appearance in desk checking S5 step and size, and inspection workman makees every 5～10min
Outward appearance and size examination at random, if finding defective work, from last time, examination at random must isolation processing to product when finding；
S7 puts in storage: pack warehouse-in in batches by inspecting qualified cylindrical controlled fragment in S6 step by random samples；
Medium carbon steel steel wire in described S1 step, its component weight percentages is:
C 0.42～0.50%, Cr 0～0.25%, Mn 0.50～0.80%；Ni 0～0.25%；P 0～0.035%；S 0
～0.035%；Si 0.17～0.37%；Nb 0.001%～0.002%, surplus is Fe.
The preparation method of a kind of cylindrical controlled fragment the most according to claim 1, it is characterised in that: in described S3 step
The length of blank is consistent with the diameter of stock.
The preparation method of a kind of cylindrical controlled fragment the most according to claim 1, it is characterised in that: in described S5 step
Cylinder stock surface nickel layer thickness is 0.008～0.012mm.
The preparation method of a kind of cylindrical controlled fragment the most according to claim 1, it is characterised in that: described medium carbon steel
Steel wire, its component weight percentages is:
C 0.44～0.48%, Cr 0.10～0.20%, Mn 0.60～0.70%；Ni 0.10～0.15%；P 0.01～
0.02%；S 0.01～0.02%；Si 0.20～0.30%；Nb0.0012%～0.018%, surplus is Fe.
The preparation method of a kind of cylindrical controlled fragment the most according to claim 1, it is characterised in that: described medium carbon steel
Steel wire, its component weight percentages is:
C 0.46%, Cr 0.125%, Mn 0.65%；Ni 0.125%；P 0.017%；S0.017%；Si 0.27%；Nb
0.0015%, surplus is Fe.
The preparation method of a kind of cylindrical controlled fragment the most according to claim 1, it is characterised in that: described cylinder is pre-
The finished diameter of fragmentation processed is 1.6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610673586.7A CN106288979A (en) | 2016-08-13 | 2016-08-13 | A kind of preparation method of cylindrical controlled fragment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610673586.7A CN106288979A (en) | 2016-08-13 | 2016-08-13 | A kind of preparation method of cylindrical controlled fragment |
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| CN106288979A true CN106288979A (en) | 2017-01-04 |
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| CN201610673586.7A Pending CN106288979A (en) | 2016-08-13 | 2016-08-13 | A kind of preparation method of cylindrical controlled fragment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112980116A (en) * | 2021-01-22 | 2021-06-18 | 北京理工大学 | Preparation method of energy storage fragment with telescopic spiral structure |
| CN113249653A (en) * | 2021-05-11 | 2021-08-13 | 北京理工大学 | Bullet steel for natural fragment warhead and preparation method thereof |
-
2016
- 2016-08-13 CN CN201610673586.7A patent/CN106288979A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112980116A (en) * | 2021-01-22 | 2021-06-18 | 北京理工大学 | Preparation method of energy storage fragment with telescopic spiral structure |
| CN112980116B (en) * | 2021-01-22 | 2022-02-15 | 北京理工大学 | Preparation method of energy storage fragment with telescopic spiral structure |
| CN113249653A (en) * | 2021-05-11 | 2021-08-13 | 北京理工大学 | Bullet steel for natural fragment warhead and preparation method thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170104 |