CN108315625A - The preparation method of armor-piercing bullet tungsten alloy - Google Patents
The preparation method of armor-piercing bullet tungsten alloy Download PDFInfo
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- CN108315625A CN108315625A CN201810255000.4A CN201810255000A CN108315625A CN 108315625 A CN108315625 A CN 108315625A CN 201810255000 A CN201810255000 A CN 201810255000A CN 108315625 A CN108315625 A CN 108315625A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
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Abstract
The invention discloses a kind of preparation methods of armor-piercing bullet tungsten alloy, are formed, are included the following steps, wet mixing, drying and screening by tungsten basal body, Ni powder, Fe powder and Re powder mixed sinterings, mix wax, and drying and screening shapes, dewaxing/pre-burning, and sintering is heat-treated after sintering.It is more effective solution strengthening element to add Re, a degree of can improve the density of alloy, and keep preferable plasticity；By the Al for adding different-grain diameter2O3Powder, ensure that reduces tensile strength under the precondition of the certain dynamic compressive strength of tungsten alloy and plasticity, improves the fragility of material, it is ensured that tungsten alloy material forms fragmentation to achieve the purpose that secondary injure after armour-piercing.
Description
Technical field
The present invention relates to technical field of alloy, and in particular to a kind of preparation method of armor-piercing bullet tungsten alloy.
Background technology
Tungsten-bast alloy is especially accounted in national defense industry in the industry in modern times because have many advantages, such as high density, high intensity
According to consequence, with the development of industry, more stringent requirements are proposed to its performance by people.
Armor-piercing bullet requires bullet core material during wearing target by the interaction and the performance characteristics of itself for playing target, automatically
Be broken into mass efficient fragmentation, after armour-piercing formed tapered expansion fragmentation barrage, to improve armor-piercing bullet to armed helicopter, lead
The penetration and secondary damage effectiveness of body and Light armoured vehicle.To ensure the emissive porwer of bullet core material and running through enough
Ability, bullet core material should have sufficiently high dynamic compression strength, while in order to ensure the brokenness of bullet core material, it should have again
There is lower dynamic tensile strength.
The patent No. 200810030663.2, a kind of grain-refining W-Ni-Fe alloy preparation method containing rare earth, using solubility
Ultra-fine/nanometer W-Ni-Fe composite powders of tungsten salt, soluble nickel salt, soluble iron salt crystal, trace soluble Rare Earth Y, La or Ce
End, W, 88-97wt%, rare earth oxide 0.02-0.8wt% in composite powder, remaining is Ni and Fe.Composite powder is pressed into
Shape is prepared into high-performance fine grain containing trace rare-earth W-Ni- after solid phase and liquid phase two-step sintering in reducing atmosphere after pre-burning
Fe alloys.The present invention deficiency be,（1）The compression strength of the grain-refining W-Ni-Fe alloy containing trace rare-earth is relatively low, as armor-piercing bullet
The material for preparing be not easy to realize secondary blasting；（2）The tensile strength of the grain-refining W-Ni-Fe alloy containing trace rare-earth is in 1000-
1300MPa, the armor-piercing bullet more than 1000MPa are the effect that anticipation is not achieved in secondary blasting, caused by later stage explosion
Effect is inadequate.
Invention content
In order to solve the problems of the above-mentioned prior art, it is an object of the invention to propose a kind of armor-piercing bullet tungsten alloy and
Preparation method.
A kind of armor-piercing bullet tungsten alloy, which is characterized in that following components composition in percentage by weight：
Ni powder 1.1%-1.3%
Fe powder 1.1%-1.4%
Re0.8%-1.0%
Tungsten basal body 96.3%-97%.
In this armor-piercing bullet tungsten alloy of the present invention, the preparation method of the tungsten basal body is reduction method, and Fisher particle size is
3.0 μm, purity 99.9%.
In this armor-piercing bullet tungsten alloy of the present invention, the preparation method of the Ni powder is carbonyl process, and Fisher particle size is
3.66 μm, purity 99.5%.
In this armor-piercing bullet tungsten alloy of the present invention, the preparation method of the Fe powder is carbonyl process, and Fisher particle size is
3.97 μm, purity 99.3%.
In this armor-piercing bullet tungsten alloy of the present invention, the preparation method of the Re powder is hydrogen reduction method, and Fisher particle size is
3.54 μm, purity 99.99%.
In this armor-piercing bullet tungsten alloy of the present invention, the tungsten basal body is after W powder, alloying element and trace element are sintered
It mills.
The present invention also provides a kind of preparation methods of armor-piercing bullet tungsten alloy, include the following steps：
Step 1: wet mixing, according to weight percent tungsten basal body 96.3%-97%, Ni powder 1.1%-1.3%, Fe powder 1.1%-1.4%,
Al is added according to the 3% of weight ratio in the powder mixed by Re0.8%-1.0%2O3, remix to be put into three-dimensional mixer and be mixed
It closing, then the ball milling in steel ball grinding cylinder, ball-milling medium is absolute alcohol, and ball milling is sintered carbide ball with ball, ratio of grinding media to material 2: 1,
Ball-milling Time is 8h-12h, rotating speed 200r-350r/min；
Step 2: drying and screening, the good slurry of the wet mixing in step 1 is dried in vacuum drying chamber, drying temperature is
100-120 DEG C, drying time 2h, 80 mesh sieve is crossed after dry；
Step 3: mix wax, additive selects paraffin gasoline solution, and solution is prepared with the molten 10g paraffin of 50ml gasoline, when additive amount
100g raw material powder mixes paraffin 2g；
Step 4: drying and screening, mixes wax and will produce the agglomerating phenomenon of raw material powder bonding in the process, and may introduce impurity, therefore to mixing
Material after wax is dried, and crosses the sieve of 80 mesh；
Step 5: forming, using common mould compression moulding, the powder mixture in step 4 is pressed into steel pressing mold
Shape, forming pressing pressure are 150-200MPa, and pressing mode is unidirectional compacting；
Step 6: dewaxing/pre-burning, dewaxing/pre-burning is in H2Reduction furnace in carry out；
Step 7: sintering, sintering uses microwave sintering or discharge plasma sintering；
Step 8: being heat-treated after sintering, using vacuum annealing process or solution hardening technique, the tungsten alloy is obtained.
In the preparation method of this armor-piercing bullet tungsten alloy of the present invention, the vacuum annealing process heating speed of the step 8
Degree is 10 DEG C/min, and 1150-1250 DEG C keeps the temperature furnace cooling after 2h-4h, vacuum degree 0.5-5Pa.
In the preparation method of this armor-piercing bullet tungsten alloy of the present invention, solution hardening technique is in argon in the step 8
Gas shielded downloads water quenching after 1150 DEG C of -1250 DEG C of heat preservation 2h-4h in molybdenum wire furnace.
In the preparation method of this armor-piercing bullet tungsten alloy of the present invention, the Al2O3A diameter of 0.6 μm, 3 μm and 7 μ
m。
The invention has the advantages that（1）, Re close to W in periodic table, addition Re can improve the intensity of tungsten alloy,
The density of tungsten alloy can also be improved simultaneously.It is more effective solution strengthening element to add Re, it is strengthening the conjunction of tungsten base high density
While golden, moreover it is possible to it is a degree of to improve the density of alloy, and keep preferable plasticity.
（2）, work as Al2O3Grain size from when increasing to 7 μm for 0.67 μm, the tensile strength of alloy is respectively 503,555 and
583MPa；Elongation percentage is respectively 7.10%, 7.55% and 8.12%, can obtain Al2O3Grain size it is larger, the tensile strength of tungsten alloy
All declined with elongation percentage.
（3）, with Al2O3The increase of particle diameter, tungsten grain shape is kept not substantially in microwave sintering W-Ni-Fe alloys
Become；With Al2O3The increase of content, Al2O3Interfacial fracture between second phase particles and Binder Phase, tungsten particle gradually increases, tungsten
The average grain diameter of particle continuously decreases.
（4）, tungsten alloy fracture mode be mostly W-W fracture, with Al2O3The increase of graininess, the tensile property meeting of tungsten alloy
There are prodigious decline, tensile strength and elongation percentage also to be declined；In addition, with Al2O3The increase of content, the surrender of tungsten alloy
Intensity is increased, and the compressive property of tungsten alloy is enhanced.
（5）, the Al of different-grain diameter is added in the tungsten alloy2O3Powder prepares a kind of novel fragile tungsten heavy alloy material.
The tungsten alloy reduces tensile strength in the case where ensureing the precondition of certain dynamic compressive strength and plasticity, improves the easy of material
Fragility, it is ensured that tungsten alloy material forms fragmentation to achieve the purpose that secondary injure after armour-piercing.
（6）, tensile strength≤1000MPa, compressive strength >=2300MPa, hardness >=23HRC, density 18.5 ± 0.15 carries
The physical property of high-tungsten alloy, anti-pressure ability, toughness make armor-piercing bullet more to make tungsten alloy be more advantageous to making armor-piercing bullet
Have the characteristics that self performance, so that the density of armor-piercing bullet is improved.
Description of the drawings
Fig. 1 is to add Al in armor-piercing bullet tungsten alloy of the present invention2O3A diameter of 0.67 μm of micro- group of dynamic compression sample section
It knits；
Fig. 2 is to add Al in armor-piercing bullet tungsten alloy of the present invention2O3A diameter of 3 μm of dynamic compression sample section microscopic structure；
Fig. 3 is to add Al in armor-piercing bullet tungsten alloy of the present invention2O3A diameter of 7 μm of dynamic compression sample section microscopic structure.
Specific implementation mode
The present invention is described further with reference to embodiment.
The tungsten basal body added in this armor-piercing bullet tungsten alloy is that W powder, alloying element and trace element sintering are milled,
It is as follows：
Alloying element is Re, Mo, Nb, Ta and Ir.The weight ratio of Re, Mo, Nb, Ta and Ir are 23.4%: 17.3%: 10.5%:
29.1%∶19.7%。
Trace element is H, O, N, P, S and Si.H, the weight ratio of O, N, P, S and Si are 18.5%: 17.3%: 15.6%:
23.7%∶5.4%∶19.5%。
Step 1: preparing material, tungsten basal body, alloying element and trace element are weighed into proportion according to weight ratio, W powder,
The weight ratio of alloying element and trace element is 96.5%: 2.7%: 0.8% uniformly mixed, then passes through ball mill ball milling, makes tungsten
Matrix, alloying element and trace element refinement, it is spare.
Step 2: the standby raw material in step 1 is tested, examine it is qualified carry out in next step, it is unqualified will again into
Row ball milling, Ball-milling Time 8h-20h, ball milling speed 13-45r/min.
Step 3: compacting, will examine qualified raw material to be pressed under the pressure of 15-600MPa in step 2,
It is pressed into required shape.
Step 4: examining, the shaping raw material in step 3 is tested, examines being further processed for qualification,
It is underproof to suppress again.
Step 5: sintering, carries out in the high temperature furnace or vacuum drying oven of protective atmosphere, sintering temperature is 1350 DEG C -1550 DEG C,
Time is 0.5h-3h, waits for natural cooling, obtains tungsten basal body.
By being mixed with alloying element in W powder, the physical property of tungsten basal body is strengthened, wherein Mo is the most apparent, Mo tools
The features such as having that intensity is high, hardness is good, density is big and is anticorrosive, other elements mainly enhance the ductility of matrix gold, make preparation
The performance of tungsten basal body out is more superior, and the tungsten alloy performance in later stage is made to get a greater increase.
In trace element, since the atomic radius of these elements is smaller, there is very strong diffusivity in W powder, thus compares
Segregation occurs compared in the higher position of the energy such as crystal boundary, phase boundary so that the performance of tungsten basal body obtains opposite raising.
Embodiment one
According to weight percent,
Tungsten basal body 97.8%, Fisher particle size are 3.0 μm, purity 99.9%；
Ni powder 1.1%, Fisher particle size are 3.66 μm, purity 99.5%；
Fe powder 1.1%, Fisher particle size are 3.97 μm, purity 99.3%.
Above-mentioned powder is mixed to be put into three-dimensional mixer and is mixed, then the ball milling in steel ball grinding cylinder, ball-milling medium
For absolute alcohol, ball milling is sintered carbide ball, ratio of grinding media to material 2: 1, Ball-milling Time 10h, rotating speed 300r/min with ball.
The good slurry of wet mixing is dried in vacuum drying chamber, drying temperature is 100-120 DEG C, and drying time is
2h crosses 80 mesh sieve after dry.
Additive is added, additive selects paraffin gasoline solution, and solution, additive amount are prepared with the molten 10g paraffin of 50ml gasoline
When 100g raw material powder mix paraffin 2g.
Drying and screening mixes and will produce raw material powder during wax and bond agglomerating phenomenon, and may introduce impurity, thus to mixing wax after
Material be dried, and cross 80 mesh sieve.
Again with common mould compression moulding, by powder mixture compression moulding in steel pressing mold, forming pressing pressure is
150-200MPa, pressing mode are unidirectional compacting.
In H2Reduction furnace in dewax, sintering use microwave sintering or discharge plasma sintering.The burning of microwave sintering
Junction temperature is low, energy saving, safety non-pollution, heating rate is fast, sintering time is short, homogeneous heating, can realize that spatial selectivity is burnt
Knot.With the raising of sintering temperature, the stomata in alloy, which gradually decreases, even to be eliminated, and W particles are thicker, and crystallite dimension gradually increases
Greatly, and distribution of the W particles in matrix phase becomes more uniformly, and interface binding intensity is also enhanced.
The heating rate of discharge plasma sintering is fast, sintering temperature is relatively low, sintering time is short, institutional framework is controllable, energy saving
Environmental protection, under lower sintering temperature and smaller briquetting pressure it is sinterable go out high performance material.With the raising of sintering temperature, alloy
Macrohardness continue to decline, and bending strength is continuously increased, and discharge plasma sintering can strictly control the same of W grain growths
When, and W/W Connected degrees are reduced as far as possible, the fine grain even nanocrystalline W-Ni-Fe alloys for having high-strength and high ductility performance can be made.
It is heat-treated after sintering, using vacuum annealing process or solution hardening technique.Vacuum annealing process heating rate is 10
DEG C/min, 1150-1250 DEG C keeps the temperature furnace cooling after 2h-4h, vacuum degree 0.5-5Pa.Solution hardening technique is under protection of argon gas
Carry water quenching after 1150 DEG C of -1250 DEG C of heat preservation 2h-4h in molybdenum wire furnace.
The tensile strength of obtained tungsten alloy, the tungsten alloy is 849MPa, elongation percentage 15.45%.
Embodiment two
According to weight percent,
Tungsten basal body 97%, Fisher particle size are 3.0 μm, purity 99.9%；
Ni powder 1.1%, Fisher particle size are 3.66 μm, purity 99.5%；
Fe powder 1.1%, Fisher particle size are 3.97 μm, purity 99.3%；
Re powder 0.8%, Fisher particle size are 3.54 μm, purity 99.99%.
Above-mentioned powder is mixed to be put into three-dimensional mixer and is mixed, then the ball milling in steel ball grinding cylinder, ball-milling medium
For absolute alcohol, ball milling is sintered carbide ball, ratio of grinding media to material 2: 1, Ball-milling Time 10h, rotating speed 300r/min with ball.
The good slurry of wet mixing is dried in vacuum drying chamber, drying temperature is 100-120 DEG C, and drying time is
2h crosses 80 mesh sieve after dry.
Additive is added, additive selects paraffin gasoline solution, and solution, additive amount are prepared with the molten 10g paraffin of 50ml gasoline
When 100g raw material powder mix paraffin 2g.
Drying and screening mixes and will produce raw material powder during wax and bond agglomerating phenomenon, and may introduce impurity, thus to mixing wax after
Material be dried, and cross 80 mesh sieve.
Again with common mould compression moulding, by powder mixture compression moulding in steel pressing mold, forming pressing pressure is
150-200MPa, pressing mode are unidirectional compacting.
The tensile strength of obtained tungsten alloy, the tungsten alloy is 774MPa, elongation percentage 10.76%.
Embodiment three
According to weight percent,
Tungsten basal body 97%, Fisher particle size are 3.0 μm, purity 99.9%；
Ni powder 1.1%, Fisher particle size are 3.66 μm, purity 99.5%；
Fe powder 1.1%, Fisher particle size are 3.97 μm, purity 99.3%；
Re powder 0.8%, Fisher particle size are 3.54 μm, purity 99.99%.
Al is added according to the 3% of weight ratio in the powder mixed2O3, Al2O3A diameter of 0.67 μm, then by above-mentioned powder
Mixing, which is put into three-dimensional mixer, to be mixed, then the ball milling in steel ball grinding cylinder, ball-milling medium are absolute alcohol, ball milling ball
For sintered carbide ball, ratio of grinding media to material 2: 1, Ball-milling Time 10h, rotating speed 300r/min.
The good slurry of wet mixing is dried in vacuum drying chamber, drying temperature is 100-120 DEG C, and drying time is
2h crosses 80 mesh sieve after dry.
Additive is added, additive selects paraffin gasoline solution, and solution, additive amount are prepared with the molten 10g paraffin of 50ml gasoline
When 100g raw material powder mix paraffin 2g.
Drying and screening mixes and will produce raw material powder during wax and bond agglomerating phenomenon, and may introduce impurity, thus to mixing wax after
Material be dried, and cross 80 mesh sieve.
Again with common mould compression moulding, by powder mixture compression moulding in steel pressing mold, forming pressing pressure is
150-200MPa, pressing mode are unidirectional compacting.
The tensile strength of obtained tungsten alloy, the tungsten alloy is 583MPa, elongation percentage 8.12%.
Example IV
According to weight percent,
Tungsten basal body 97%, Fisher particle size are 3.0 μm, purity 99.9%；
Ni powder 1.1%, Fisher particle size are 3.66 μm, purity 99.5%；
Fe powder 1.1%, Fisher particle size are 3.97 μm, purity 99.3%；
Re powder 0.8%, Fisher particle size are 3.54 μm, purity 99.99%.
Al is added according to the 3% of weight ratio in the powder mixed2O3, Al2O3A diameter of 3 μm, then above-mentioned powder is mixed
Conjunction is put into three-dimensional mixer and is mixed, then the ball milling in steel ball grinding cylinder, and ball-milling medium is absolute alcohol, and ball milling is with ball
Sintered carbide ball, ratio of grinding media to material 2: 1, Ball-milling Time 10h, rotating speed 300r/min.
The good slurry of wet mixing is dried in vacuum drying chamber, drying temperature is 100-120 DEG C, and drying time is
2h crosses 80 mesh sieve after dry.
Additive is added, additive selects paraffin gasoline solution, and solution, additive amount are prepared with the molten 10g paraffin of 50ml gasoline
When 100g raw material powder mix paraffin 2g.
Drying and screening mixes and will produce raw material powder during wax and bond agglomerating phenomenon, and may introduce impurity, thus to mixing wax after
Material be dried, and cross 80 mesh sieve.
Again with common mould compression moulding, by powder mixture compression moulding in steel pressing mold, forming pressing pressure is
150-200MPa, pressing mode are unidirectional compacting.
The tensile strength of obtained tungsten alloy, the tungsten alloy is 555MPa, elongation percentage 7.55%.
Embodiment five
According to weight percent,
Tungsten basal body 97%, Fisher particle size are 3.0 μm, purity 99.9%；
Ni powder 1.1%, Fisher particle size are 3.66 μm, purity 99.5%；
Fe powder 1.1%, Fisher particle size are 3.97 μm, purity 99.3%；
Re powder 0.8%, Fisher particle size are 3.54 μm, purity 99.99%.
Al is added according to the 3% of weight ratio in the powder mixed2O3, Al2O3A diameter of 7 μm, then above-mentioned powder is mixed
Conjunction is put into three-dimensional mixer and is mixed, then the ball milling in steel ball grinding cylinder, and ball-milling medium is absolute alcohol, and ball milling is with ball
Sintered carbide ball, ratio of grinding media to material 2: 1, Ball-milling Time 10h, rotating speed 300r/min.
The good slurry of wet mixing is dried in vacuum drying chamber, drying temperature is 100-120 DEG C, and drying time is
2h crosses 80 mesh sieve after dry.
Additive is added, additive selects paraffin gasoline solution, and solution, additive amount are prepared with the molten 10g paraffin of 50ml gasoline
When 100g raw material powder mix paraffin 2g.
Drying and screening mixes and will produce raw material powder during wax and bond agglomerating phenomenon, and may introduce impurity, thus to mixing wax after
Material be dried, and cross 80 mesh sieve.
Again with common mould compression moulding, by powder mixture compression moulding in steel pressing mold, forming pressing pressure is
150-200MPa, pressing mode are unidirectional compacting.
The tensile strength of obtained tungsten alloy, the tungsten alloy is 503MPa, elongation percentage 7.10%.
Comparative example one and embodiment two, data therein for as make armor-piercing bullet material be possible, but
It is that utilize high injury caused by secondary blasting at it be worthless.Embodiment two is prolonged due to being added to Re, tungsten alloy
The rate of stretching is significantly improved, but tensile strength not how many decline.
Comparative example two and embodiment three are compared, due to being added to Re and Al2O3, wherein Re reduces prolonging for tungsten alloy
Stretch rate, the Al of addition2O3Particle distribution is inside Binder Phase, when tungsten alloy is stretched stress, due to Binder Phase plasticity compared with
It is good, it deforms first, stress is then passed into Al2O3On particle；Due to Al2O3The intensity of particle is very high, cannot be with Binder Phase
Occur to coordinate to be plastically deformed, and Al2O3The interface bond strength of particle and Binder Phase is very low, under stress, Al2O3Particle
Micro-crack is germinated in interface between Binder Phase first, and crack propagation makes interfacial separation, ultimately forms Al2O3Particle with it is viscous
Tie the separation fracture of phase.
Comparative example three, example IV and embodiment five, work as Al2O3From when increasing to 7 μm for 0.6 μm, alloy resists grain size
Tensile strength is respectively 583,555 and 503MPa；Elongation percentage is respectively 8.12%, 7.55% and 7.10%.It can obtain with Al2O3Grain
The increase of diameter, the tensile strength and elongation percentage of tungsten alloy are all declined.Such tungsten alloy material can be used as to prepare and wear
First bullet tungsten alloy prepares material,
Tungsten alloy fracture mode is mostly W-W fractures, with Al2O3The tensile property of the increase of graininess, tungsten alloy has very greatly
Decline, tensile strength and elongation percentage are also declined；In addition, with Al2O3The yield strength of the increase of content, tungsten alloy has
Increased, enhances the compressive property of tungsten alloy.And the tungsten alloy is in the premise for ensureing certain dynamic compressive strength and plasticity
Under the conditions of reduce tensile strength, improve the fragility of material, it is ensured that tungsten alloy material forms fragmentation to reach after armour-piercing
To the secondary purpose injured.
In short, the foregoing is merely a prefered embodiment of the invention, it is all according to equivalent change made by scope of the present invention patent
With modification, it should all belong to the covering scope of patent of the present invention.
Claims (10)
1. a kind of armor-piercing bullet tungsten alloy, which is characterized in that following components composition in percentage by weight：
Ni powder 1.1%-1.3%
Fe powder 1.1%-1.4%
Re0.8%-1.0%
Tungsten basal body 96.3%-97%.
2. armor-piercing bullet tungsten alloy according to claim 1, which is characterized in that the preparation method of the tungsten basal body is reduction
Method, Fisher particle size are 3.0 μm, purity 99.9%.
3. armor-piercing bullet tungsten alloy according to claim 1, which is characterized in that the preparation method of the Ni powder is carbonyl process,
Fisher particle size is 3.66 μm, purity 99.5%.
4. armor-piercing bullet tungsten alloy according to claim 1, which is characterized in that the preparation method of the Fe powder is carbonyl process,
Fisher particle size is 3.97 μm, purity 99.3%.
5. armor-piercing bullet tungsten alloy according to claim 1, which is characterized in that the preparation method of the Re powder is hydrogen reduction
Method, Fisher particle size are 3.54 μm, purity 99.99%.
6. armor-piercing bullet tungsten alloy according to claim 1, which is characterized in that the tungsten basal body is W powder, alloying element and micro-
It mills after secondary element sintering.
7. a kind of method preparing armor-piercing bullet tungsten alloy, which is characterized in that include the following steps：
Step 1: wet mixing, according to weight percent tungsten basal body 96.3%-97%, Ni powder 1.1%-1.3%, Fe powder 1.1%-1.4%,
Al is added according to the 3% of weight ratio in the powder mixed by Re0.8%-1.0%2O3, remix to be put into three-dimensional mixer and be mixed
It closing, then the ball milling in steel ball grinding cylinder, ball-milling medium is absolute alcohol, and ball milling is sintered carbide ball with ball, ratio of grinding media to material 2: 1,
Ball-milling Time is 8h-12h, rotating speed 200r-350r/min；
Step 2: drying and screening, the good slurry of the wet mixing in step 1 is dried in vacuum drying chamber, drying temperature is
100-120 DEG C, drying time 2h, 80 mesh sieve is crossed after dry；
Step 3: mix wax, additive selects paraffin gasoline solution, and solution is prepared with the molten 10g paraffin of 50ml gasoline, when additive amount
100g raw material powder mixes paraffin 2g；
Step 4: drying and screening, mixes wax and will produce the agglomerating phenomenon of raw material powder bonding in the process, and may introduce impurity, therefore to mixing
Material after wax is dried, and crosses the sieve of 80 mesh；
Step 5: forming, using common mould compression moulding, the powder mixture in step 4 is pressed into steel pressing mold
Shape, forming pressing pressure are 150-200MPa, and pressing mode is unidirectional compacting；
Step 6: dewaxing/pre-burning, dewaxing/pre-burning is in H2Reduction furnace in carry out；
Step 7: sintering, sintering uses microwave sintering or discharge plasma sintering；
Step 8: being heat-treated after sintering, using vacuum annealing process or solution hardening technique, the tungsten alloy is obtained.
8. the method for preparing armor-piercing bullet tungsten alloy according to claim 7, which is characterized in that the vacuum annealing of the step 8
Technique heating rate is 10 DEG C/min, and 1150 DEG C -1250 DEG C keep the temperature furnace cooling after 2h-4h, vacuum degree 0.5-5Pa.
9. the method for preparing armor-piercing bullet tungsten alloy according to claim 7, which is characterized in that solution hardening in the step 8
Technique is to carry water quenching after 1150 DEG C of -1250 DEG C of heat preservation 2h-4h in molybdenum wire furnace under protection of argon gas.
10. the method for preparing armor-piercing bullet tungsten alloy according to claim 7, which is characterized in that the Al2O3A diameter of 0.6
μm, 3 μm and 7 μm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108172A (en) * | 2019-05-14 | 2019-08-09 | 中国兵器科学研究院宁波分院 | A kind of two-layer composite spherical shape is prefabricated to injure member and preparation method thereof |
| CN115478236A (en) * | 2022-08-30 | 2022-12-16 | 广州市华司特合金制品有限公司 | Heat treatment method of high specific gravity tungsten alloy |
| CN116479299A (en) * | 2023-04-28 | 2023-07-25 | 湖南顶立科技股份有限公司 | Powder metallurgy method of high-strength high-toughness tungsten alloy and tungsten alloy material |
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2018
- 2018-03-27 CN CN201810255000.4A patent/CN108315625A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108172A (en) * | 2019-05-14 | 2019-08-09 | 中国兵器科学研究院宁波分院 | A kind of two-layer composite spherical shape is prefabricated to injure member and preparation method thereof |
| CN110108172B (en) * | 2019-05-14 | 2022-03-25 | 中国兵器科学研究院宁波分院 | Spherical prefabricated damaged element with double-layer composite structure and preparation method thereof |
| CN115478236A (en) * | 2022-08-30 | 2022-12-16 | 广州市华司特合金制品有限公司 | Heat treatment method of high specific gravity tungsten alloy |
| CN115478236B (en) * | 2022-08-30 | 2023-02-28 | 广州市华司特合金制品有限公司 | Heat treatment method of high specific gravity tungsten alloy |
| CN116479299A (en) * | 2023-04-28 | 2023-07-25 | 湖南顶立科技股份有限公司 | Powder metallurgy method of high-strength high-toughness tungsten alloy and tungsten alloy material |
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