CN105441765A - Missile heavy-gravity tungsten alloy and preparation method thereof - Google Patents
Missile heavy-gravity tungsten alloy and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
- B22F9/26—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions using gaseous reductors
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The invention discloses a missile heavy-gravity tungsten alloy and a preparation method thereof, and belongs to the field of metal materials. The missile heavy-gravity tungsten alloy consists of the following alloy components in percentage by mass: 90.0%%-97.0% of tungsten, 0.1%-2.0% of zirconium oxide, 2.0%-9.9% of binding-phase nickel and iron, and inevitable impurities, wherein a mass ratio of the nickel to the iron is (3-4) to (2-1). The preparation method comprises the following steps: respectively dissolving ammonium metatungstate and zirconium nitrate into water, mixing to obtain mixed liquor, drying the mixed liquor to obtain power, roasting and reducing the powder to obtain composite tungsten powder; taking nickel powder and iron powder, carrying out ball-milling on the nickel powder and the iron powder after mixing, thereby obtaining a nickel-iron solid solution; mixing the composite tungsten powder with the nickel-iron solid solution to obtain mixed powder, and pressing and sintering the mixed powder to obtain the missile heavy-gravity tungsten alloy. According to the invention, high-temperature steady-phase ZrO2 is added into the tungsten alloy, a ZrO2 dispersed phase is fine and is uniformly distributed in a tungsten base body, so that the problem of poor mechanical property because of low compactness and uneven phase distribution of the missile tungsten alloy is solved; tensile strength of the tungsten alloy is higher than 1250MPa, and ductility of the tungsten alloy is higher than 17%; and the missile heavy-gravity tungsten alloy has the characteristics of high strength and high plasticity.
Description
Technical field
The present invention relates to a kind of bullet high-specific gravity tungsten alloy, also relate to the preparation method of bullet high-specific gravity tungsten alloy simultaneously, belong to metal material field.
Background technology
High-specific gravity tungsten alloy is a class is matrix with tungsten, and is added with the alloy of the elements such as Ni, Fe, Co, Cu, Mo, Cr, and density is generally 17.5 ~ 19.0g/cm
3.High-specific gravity tungsten alloy not only density is large, but also have that fusing point is high, intensity is large, hardness is high, electrical and thermal conductivity is good, thermal expansivity is little, steam forces down and the advantage such as hot strength is large, the performance of these excellences make its national defence, nuclear industry particularly civilian industry etc. be used widely, as tungstenalloy is used for rod-type kinetic energy penetrator bullet core material and counterweight element, inertance element, radiation shielding material etc.Along with the strengthening day by day of main battle tank, warship armor and various military fortification, more and more higher requirement is proposed to the performance of bullet material.The armour-piercing capability of high-specific gravity tungsten alloy kinetic energy penetrator is large, has the advantage such as nontoxicity, no radioactivity pollute compared with Depleted Uranium Alloys armour piercing shot, and being the armor-piercing weapon equipment that countries in the world are main now, is also the direction of Future Development.But, armour piercing shot core high-specific gravity tungsten alloy remains in many defects affecting stability such as Binder Phase skewness, hydrogen embrittlement, intermetallic compound segregation, residual porosity be many, and sintered state high-specific gravity tungsten alloy blank intensity and plasticity all lower, the dynamic stretching of conventional W-Ni-Fe system high density tungsten alloy also needs further raising.
Summary of the invention
The object of this invention is to provide a kind of high strength, high-ductility bullet high-specific gravity tungsten alloy.
Meanwhile, the present invention also provides a kind of preparation method of above-mentioned bullet high-specific gravity tungsten alloy.
In order to realize above object, the technical solution adopted in the present invention is:
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 90.0% ~ 97.0%,
Zirconium white (ZrO
2) 0.1% ~ 2.0%,
Binder Phase nickel and iron (Ni, Fe) 2.0% ~ 9.9%, the mass ratio of nickel and iron is 3 ~ 4:2 ~ 1;
And inevitable impurity.
The preparation method of bullet high-specific gravity tungsten alloy, step is as follows: respectively by ammonium metawolframate (AMT), zirconium nitrate (Zr (NO
3)
45H
2o) soluble in water, mixing, mixed solution is dry obtains powder, and powder obtains compound tungsten powder through calcining, reduction; Get nickel powder, iron powder, ball milling after mixing, obtains ferronickel sosoloid; By compound tungsten powder, the mixing of ferronickel sosoloid, powder mix is repressed, sintering, to obtain final product.
The mass ratio of described ammonium metawolframate and zirconium nitrate is 123 ~ 133:0.35 ~ 7.0, is preferably 123.36 ~ 132.96:0.35 ~ 6.97.The purity of ammonium metawolframate is greater than 99.7%, and granularity is less than 200 orders.The purity of zirconium nitrate is greater than 99.5%, and granularity is less than 120 orders.
The temperature of described calcining is 400 ~ 600 DEG C, calcination time 4 ~ 5h.
Described reduction divides two sections to carry out, first paragraph reduction temperature 450 ~ 600 DEG C, recovery time 1 ~ 2h, second segment reduction temperature 850 ~ 900 DEG C, recovery time 2 ~ 4h.
The particle size of described compound tungsten powder is 500 ~ 1000nm.
Described nickel powder and ammonium metawolframate mass ratio are 1.4 ~ 7:123 ~ 133, and be preferably 1.40 ~ 6.97:123.36 ~ 132.96, the mass ratio of nickel powder and iron powder is 3 ~ 4:2 ~ 1.The carbonyl nickel powder of the preferred purity more than 99.5% of nickel powder, mean particle size 2 ~ 8 μm.The carbonyl iron dust of the preferred purity more than 99.5% of iron powder, mean particle size 2 ~ 8 μm.
The particle size of described ferronickel sosoloid is 0.8 ~ 2 μm, is sub-micron crystal after ball milling.
The rotating speed of described ball milling is 200 ~ 350rpm, Ball-milling Time 20 ~ 35h.Ball milling carries out, in case powder is oxidized in inert atmosphere (high-purity argon gas as purity more than 99.99%).Milling material can adopt GCrl5 bead (diameter is as 6mm), and ratio of grinding media to material (mass ratio) is 5 ~ 15:1.
The pressure of described compacting is 200 ~ 350MPa, dwell time 20 ~ 40min.Can obtain that density is higher, wild phase is uniformly distributed, the uniform blank of porosity at this pressure, it can uniform filling hole in follow-up sintering process, not easily causes component segregation.
The temperature of described sintering is 1450 ~ 1550 DEG C, soaking time 120 ~ 180min.Too low or the too short meeting of sintering time of sintering temperature makes the relative tungsten of doping not infiltrate mutually or infiltrates poor, causes two-phase interface combination more weak, easily becomes formation of crack; And sintering temperature is too high or sintering time is long, then can produce the agglomeration of tungsten grain, cause tungsten particle size in alloy uneven and Binder Phase skewness, easily make the extensibility of alloy reduce.
Beneficial effect of the present invention:
The mechanical property important of the composition of oxide compound, addition and addition manner alloy in tungstenalloy.Ammonium metatungstate solution and zirconium nitrate solution, with liquid liquid doping way, are fully mixed rear evaporate to dryness and obtain dried powder by the present invention, then carry out calcining, reduction treatment, WO in reduction process
3volatilize in hydrogen atmosphere and proceed to gas phase, be reduced in vapour form and be deposited on Tungsten oxide 99.999 or doping phase ZrO at a low price
2surface, the equally distributed compound tungsten powder of forming component.This sol-gel and coreduction technique, ensure that the uniformity consistency of each composition in compound tungsten powder.
The present invention, by reasonable component proportioning and each process parameter of strict control, adds high-temperature stable phase ZrO in tungstenalloy
2, ZrO
2disperse phase is tiny and be uniformly distributed in tungsten basal body, solves that bullet tungstenalloy density is low, Entropy density deviation is uneven so that the problem of poor mechanical property, and the tensile strength of tungstenalloy reaches more than 1250MPa, and unit elongation reaches more than 17%, has high strength and high-ductility characteristic concurrently.
Accompanying drawing explanation
Fig. 1 is the micro-organization chart of tungstenalloy in embodiment 3;
Fig. 2 is the EDS analysis of spectra of tungstenalloy in embodiment 3.
Embodiment
Following embodiment is only described in further detail the present invention, but does not form any limitation of the invention.
Embodiment 1
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 94.6%,
Zirconium white (ZrO
2) 0.6%,
Nickel (Ni) 3.36%,
Iron (Fe) 1.44%,
And inevitable impurity.
The bullet preparation method of high-specific gravity tungsten alloy (100kg), comprises the following steps:
1) containing the preparation of zirconium white compound tungsten powder
129.68kg ammonium metawolframate (it is 92% that ammonium metawolframate is converted into oxidation tungsten powder rate) and 2.09kg zirconium nitrate are distinguished soluble in water, then two solution are mixed to obtain mixed solution; Get mixed solution evaporate to dryness, the dried powder obtained is calcined 4 hours at temperature 500 DEG C; Calcinate is put into point two sections of reduction of push rod reduction furnace, the temperature of first paragraph reduction is 550 DEG C, and 1 hour recovery time, the temperature of second segment reduction is 900 DEG C, 3 hours recovery times, crosses 120 eye mesh screens and obtain compound tungsten powder after reduction;
2) preparation of Binder Phase ferronickel sosoloid
3.36kg nickel powder and 1.44kg iron powder is taken according to mass ratio 7:3, and put it in high-energy stirring formula ball mill, pass into high-purity argon gas (purity is greater than 99.99%) as protection gas, milling material adopts the GCr15 bead of diameter 6mm, ratio of grinding media to material (mass ratio) 10:1, controlling drum's speed of rotation is 250 revs/min, and Ball-milling Time is 25 hours, obtains sub-micron crystal ferronickel sosoloid;
3) preparation of powder mix
95.20kg compound tungsten powder and 4.80kg ferronickel sosoloid are placed in inclination mixer mix, rotating speed 25 revs/min, 13 °, angle of inclination, the mixed 25 hours powder time, cross 120 eye mesh screens after mixing, obtain powder mix;
4) compacting, sinter molding
Powder mix is put into the gum cover that wall thickness is about 2mm, then be placed in 250MPa ultra-high voltage indoor and carry out isostatic cool pressing, the dwell time is 30 minutes, obtains blank of colding pressing; Hydrogen shield sintering oven put into by blank of colding pressing, and liquid phase sintering at temperature 1500 DEG C, sintering time is 150 minutes, to obtain final product.
Embodiment 2
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 91.7%,
Zirconium white (ZrO
2) 0.2%,
Nickel (Ni) 5.67%,
Iron (Fe) 2.43%,
And inevitable impurity.
The bullet preparation method of high-specific gravity tungsten alloy (100kg), comprises the following steps:
1) containing the preparation of zirconium white compound tungsten powder
125.71kg ammonium metawolframate and 0.70kg zirconium nitrate are distinguished soluble in water, then two solution are mixed to obtain mixed solution; Get mixed solution evaporate to dryness, the dried powder obtained is calcined 5 hours at temperature 400 DEG C; Calcinate is put into point two sections of reduction of push rod reduction furnace, the temperature of first paragraph reduction is 500 DEG C, and 2 hours recovery times, the temperature of second segment reduction is 850 DEG C, 2 hours recovery times, crosses 200 eye mesh screens and obtain compound tungsten powder after reduction;
2) preparation of Binder Phase ferronickel sosoloid
5.67kg nickel powder and 2.43kg iron powder is taken according to mass ratio 7:3, and put it in high-energy stirring formula ball mill, pass into high-purity argon gas (purity is greater than 99.99%) as protection gas, milling material adopts the GCr15 bead of diameter 6mm, ratio of grinding media to material (mass ratio) 12:1, controlling drum's speed of rotation is 300 revs/min, and Ball-milling Time is 30 hours, obtains sub-micron crystal ferronickel sosoloid;
3) preparation of powder mix
91.90kg compound tungsten powder and 8.10kg ferronickel sosoloid are placed in inclination mixer mix, rotating speed 25 revs/min, 13 °, angle of inclination, the mixed 20 hours powder time, cross 100 eye mesh screens after mixing, obtain powder mix;
4) compacting, sinter molding
Powder mix is put into the gum cover that wall thickness is about 2mm, then be placed in 350MPa ultra-high voltage indoor and carry out isostatic cool pressing, the dwell time is 40 minutes, obtains blank of colding pressing; Hydrogen shield sintering oven put into by blank of colding pressing, and liquid phase sintering at temperature 1480 DEG C, sintering time is 140 minutes, to obtain final product.
Embodiment 3
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 92.9%,
Zirconium white (ZrO
2) 0.8%,
Nickel (Ni) 4.41%,
Iron (Fe) 1.89%,
And inevitable impurity.
The bullet preparation method of high-specific gravity tungsten alloy (100kg), comprises the following steps:
1) containing the preparation of zirconium white compound tungsten powder
127.35kg ammonium metawolframate and 2.79kg zirconium nitrate are distinguished soluble in water, then two solution are mixed to obtain mixed solution; Get mixed solution evaporate to dryness, the dried powder obtained is calcined 5 hours at temperature 450 DEG C; Calcinate is put into point two sections of reduction of push rod reduction furnace, the temperature of first paragraph reduction is 600 DEG C, and 1.5 hours recovery times, the temperature of second segment reduction is 900 DEG C, 4 hours recovery times, crosses 140 eye mesh screens and obtain compound tungsten powder after reduction;
2) preparation of Binder Phase ferronickel sosoloid
4.41kg nickel powder and 1.89kg iron powder is taken according to mass ratio 7:3, and put it in high-energy stirring formula ball mill, pass into high-purity argon gas (purity is greater than 99.99%) as protection gas, milling material adopts the GCr15 bead of diameter 6mm, ratio of grinding media to material (mass ratio) 14:1, controlling drum's speed of rotation is 200 revs/min, and Ball-milling Time is 20 hours, obtains sub-micron crystal ferronickel sosoloid;
3) preparation of powder mix
93.70kg compound tungsten powder and 6.30kg ferronickel sosoloid are placed in inclination mixer mix, rotating speed 25 revs/min, 13 °, angle of inclination, the mixed 30 hours powder time, cross 140 eye mesh screens after mixing, obtain powder mix;
4) compacting, sinter molding
Powder mix is put into the gum cover that wall thickness is about 2mm, then be placed in 200MPa ultra-high voltage indoor and carry out isostatic cool pressing, the dwell time is 35 minutes, obtains blank of colding pressing; Hydrogen shield sintering oven put into by blank of colding pressing, and liquid phase sintering at temperature 1520 DEG C, sintering time is 180 minutes, to obtain final product.
Embodiment 4
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 96.6%,
Zirconium white (ZrO
2) 0.4%,
Nickel (Ni) 2.1%,
Iron (Fe) 0.9%,
And inevitable impurity.
The bullet preparation method of high-specific gravity tungsten alloy (100kg), comprises the following steps:
1) containing the preparation of zirconium white compound tungsten powder
132.80kg ammonium metawolframate and 1.40kg zirconium nitrate are distinguished soluble in water, then two solution are mixed to obtain mixed solution; Get mixed solution evaporate to dryness, the dried powder obtained is calcined 4 hours at temperature 600 DEG C; Calcinate is put into point two sections of reduction of push rod reduction furnace, the temperature of first paragraph reduction is 450 DEG C, and 1 hour recovery time, the temperature of second segment reduction is 850 DEG C, 2 hours recovery times, crosses 200 eye mesh screens and obtain compound tungsten powder after reduction;
2) preparation of Binder Phase ferronickel sosoloid
2.10kg nickel powder and 0.90kg iron powder is taken according to mass ratio 7:3, and put it in high-energy stirring formula ball mill, pass into high-purity argon gas (purity is greater than 99.99%) as protection gas, milling material adopts the GCr15 bead of diameter 6mm, ratio of grinding media to material (mass ratio) 6:1, controlling drum's speed of rotation is 350 revs/min, and Ball-milling Time is 35 hours, obtains sub-micron crystal ferronickel sosoloid;
3) preparation of powder mix
97.00kg compound tungsten powder and 3.00kg ferronickel sosoloid are placed in inclination mixer mix, rotating speed 25 revs/min, 13 °, angle of inclination, the mixed 15 hours powder time, cross 80 eye mesh screens after mixing, obtain powder mix;
4) compacting, sinter molding
Powder mix is put into the gum cover that wall thickness is about 2mm, then be placed in 300MPa ultra-high voltage indoor and carry out isostatic cool pressing, the dwell time is 25 minutes, obtains blank of colding pressing; Hydrogen shield sintering oven put into by blank of colding pressing, and liquid phase sintering at temperature 1530 DEG C, sintering time is 120 minutes, to obtain final product.
Embodiment 5
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 90.0%,
Zirconium white (ZrO
2) 2.0%,
Nickel (Ni) 6.4%,
Iron (Fe) 1.6%,
And inevitable impurity.
The bullet preparation method of high-specific gravity tungsten alloy (100kg), comprises the following steps:
1) containing the preparation of zirconium white compound tungsten powder
123.36kg ammonium metawolframate and 6.97kg zirconium nitrate are distinguished soluble in water, then two solution are mixed to obtain mixed solution; Get mixed solution evaporate to dryness, the dried powder obtained is calcined 4.5 hours at temperature 500 DEG C; Calcinate is put into point two sections of reduction of push rod reduction furnace, the temperature of first paragraph reduction is 550 DEG C, and 1.5 hours recovery times, the temperature of second segment reduction is 850 DEG C, 3 hours recovery times, crosses 200 eye mesh screens and obtain compound tungsten powder after reduction;
2) preparation of Binder Phase ferronickel sosoloid
6.40kg nickel powder and 1.60kg iron powder is taken according to mass ratio 8:2, and put it in high-energy stirring formula ball mill, pass into high-purity argon gas (purity is greater than 99.99%) as protection gas, milling material adopts the GCr15 bead of diameter 6mm, ratio of grinding media to material (mass ratio) 5:1, controlling drum's speed of rotation is 300 revs/min, and Ball-milling Time is 25 hours, obtains sub-micron crystal ferronickel sosoloid;
3) preparation of powder mix
92.00kg compound tungsten powder and 8.00kg ferronickel sosoloid are placed in inclination mixer mix, rotating speed 25 revs/min, 13 °, angle of inclination, the mixed 25 hours powder time, cross 100 eye mesh screens after mixing, obtain powder mix;
4) compacting, sinter molding
Powder mix is put into the gum cover that wall thickness is about 2mm, then be placed in 350MPa ultra-high voltage indoor and carry out isostatic cool pressing, the dwell time is 20 minutes, obtains blank of colding pressing; Hydrogen shield sintering oven put into by blank of colding pressing, and liquid phase sintering at temperature 1450 DEG C, sintering time is 180 minutes, to obtain final product.
Embodiment 6
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 90.0%,
Zirconium white (ZrO
2) 0.1%,
Nickel (Ni) 6.97%,
Iron (Fe) 2.93%,
And inevitable impurity.
The bullet preparation method of high-specific gravity tungsten alloy (100kg), comprises the following steps:
1) containing the preparation of zirconium white compound tungsten powder
123.36kg ammonium metawolframate and 0.35kg zirconium nitrate are distinguished soluble in water, then two solution are mixed to obtain mixed solution; Get mixed solution evaporate to dryness, the dried powder obtained is calcined 4.5 hours at temperature 500 DEG C; Calcinate is put into point two sections of reduction of push rod reduction furnace, the temperature of first paragraph reduction is 550 DEG C, and 1.5 hours recovery times, the temperature of second segment reduction is 850 DEG C, 3 hours recovery times, crosses 200 eye mesh screens and obtain compound tungsten powder after reduction;
2) preparation of Binder Phase ferronickel sosoloid
6.97kg nickel powder and 2.93kg iron powder is taken according to mass ratio 7:3, and put it in high-energy stirring formula ball mill, pass into high-purity argon gas (purity is greater than 99.99%) as protection gas, milling material adopts the GCr15 bead of diameter 6mm, ratio of grinding media to material (mass ratio) 5:1, controlling drum's speed of rotation is 300 revs/min, and Ball-milling Time is 25 hours, obtains sub-micron crystal ferronickel sosoloid;
Other operation stepss are all with embodiment 5.
Embodiment 7
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 96.0%,
Zirconium white (ZrO
2) 2.0%,
Nickel (Ni) 1.4%,
Iron (Fe) 0.6%,
And inevitable impurity.
The bullet preparation method of high-specific gravity tungsten alloy (100kg), comprises the following steps:
1) containing the preparation of zirconium white compound tungsten powder
131.60kg ammonium metawolframate and 6.97kg zirconium nitrate are distinguished soluble in water, then two solution are mixed to obtain mixed solution; Get mixed solution evaporate to dryness, the dried powder obtained is calcined 4.5 hours at temperature 500 DEG C; Calcinate is put into point two sections of reduction of push rod reduction furnace, the temperature of first paragraph reduction is 550 DEG C, and 1.5 hours recovery times, the temperature of second segment reduction is 850 DEG C, 3 hours recovery times, crosses 200 eye mesh screens and obtain compound tungsten powder after reduction;
2) preparation of Binder Phase ferronickel sosoloid
1.40kg nickel powder and 0.60kg iron powder is taken according to mass ratio 7:3, and put it in high-energy stirring formula ball mill, pass into high-purity argon gas (purity is greater than 99.99%) as protection gas, milling material adopts the GCr15 bead of diameter 6mm, ratio of grinding media to material (mass ratio) 5:1, controlling drum's speed of rotation is 300 revs/min, and Ball-milling Time is 25 hours, obtains sub-micron crystal ferronickel sosoloid;
Other operation stepss are all with embodiment 5.
Embodiment 8
Bullet high-specific gravity tungsten alloy, is calculated in mass percent, and alloying constituent is as follows:
Tungsten (W) 97.0%,
Zirconium white (ZrO
2) 0.2%,
Nickel (Ni) 2.24%,
Iron (Fe) 0.56%,
And inevitable impurity.
The bullet preparation method of high-specific gravity tungsten alloy (100kg), comprises the following steps:
1) containing the preparation of zirconium white compound tungsten powder
132.96kg ammonium metawolframate and 0.70kg zirconium nitrate are distinguished soluble in water, then two solution are mixed to obtain mixed solution; Get mixed solution evaporate to dryness, the dried powder obtained is calcined 4.5 hours at temperature 500 DEG C; Calcinate is put into point two sections of reduction of push rod reduction furnace, the temperature of first paragraph reduction is 550 DEG C, and 1.5 hours recovery times, the temperature of second segment reduction is 850 DEG C, 3 hours recovery times, crosses 200 eye mesh screens and obtain compound tungsten powder after reduction;
2) preparation of Binder Phase ferronickel sosoloid
2.24kg nickel powder and 0.56kg iron powder is taken according to mass ratio 8:2, and put it in high-energy stirring formula ball mill, pass into high-purity argon gas (purity is greater than 99.99%) as protection gas, milling material adopts the GCr15 bead of diameter 6mm, ratio of grinding media to material (mass ratio) 5:1, controlling drum's speed of rotation is 300 revs/min, and Ball-milling Time is 25 hours, obtains sub-micron crystal ferronickel sosoloid;
Other operation stepss are all with embodiment 5.
Test example
1, the measured performance parameter of bullet high-specific gravity tungsten alloy
Example 3 is hit by a bullet with high-specific gravity tungsten alloy, division lines method is adopted to measure the grain size of alloy, Archimedes's drainage is adopted to measure alloy density, HMAS-C1000SZA microhardness tester are adopted to measure the microhardness of alloy, adopt the accurate universal material experimental machine of AG-I250KN to measure the tensile strength of alloy simultaneously, the results are shown in following table 1.
Table 1 embodiment 3 is hit by a bullet by the performance perameter of high-specific gravity tungsten alloy
As can be seen from Table 1, embodiment 3 is hit by a bullet and is reached 1256MPa/mm by the tensile strength of high-specific gravity tungsten alloy
2, exceed about 50% than conventional tungstenalloy, unit elongation reaches 17%, meets the high strength of bullet material, high-ductility requirement.
2, in bullet high-specific gravity tungsten alloy, the EDS of disperse phase analyzes
Example 3 is hit by a bullet with high-specific gravity tungsten alloy, carries out EDS analysis to the disperse phase in tungstenalloy tissue, and analytical results sees the following form 2 and Fig. 2.
Table 2 embodiment 3 is hit by a bullet with the component list of high-specific gravity tungsten alloy
| Composition | Wt(％) | At(％) |
| W | 22.63 | 6.06 |
| Zr | 56.79 | 30.63 |
| O | 20.59 | 63.31 |
To find out viewed from table 2 and Fig. 2, in the tungstenalloy of embodiment 3, high temperature disperse phase ZrO
2particle tiny and in tungsten basal body Dispersed precipitate, solve the problem of bullet tungstenalloy Entropy density deviation inequality.
Claims (9)
1. bullet high-specific gravity tungsten alloy, it is characterized in that: be calculated in mass percent, alloying constituent is as follows:
Tungsten 90.0% ~ 97.0%,
Zirconium white 0.1% ~ 2.0%,
Binder Phase nickel and iron 2.0% ~ 9.9%, the mass ratio of nickel and iron is 3 ~ 4:2 ~ 1;
And inevitable impurity.
2. the preparation method of bullet high-specific gravity tungsten alloy as claimed in claim 1, is characterized in that: step is as follows: respectively that ammonium metawolframate, zirconium nitrate is soluble in water, mixing, mixed solution dry powder, powder obtains compound tungsten powder through calcining, reduction; Get nickel powder, iron powder, ball milling after mixing, obtains ferronickel sosoloid; By compound tungsten powder, the mixing of ferronickel sosoloid, powder mix is repressed, sintering, to obtain final product.
3. preparation method according to claim 2, is characterized in that: the mass ratio of described ammonium metawolframate and zirconium nitrate is 123 ~ 133:0.35 ~ 7.0.
4. preparation method according to claim 2, is characterized in that: the temperature of described calcining is 400 ~ 600 DEG C, calcination time 4 ~ 5h.
5. preparation method according to claim 2, is characterized in that: described reduction divides two sections to carry out, first paragraph reduction temperature 450 ~ 600 DEG C, recovery time 1 ~ 2h, second segment reduction temperature 850 ~ 900 DEG C, recovery time 2 ~ 4h.
6. preparation method according to claim 2, is characterized in that: the mass ratio of described nickel powder and ammonium metawolframate is 1.4 ~ 7:123 ~ 133, and the mass ratio of nickel powder and iron powder is 3 ~ 4:2 ~ 1.
7. preparation method according to claim 2, is characterized in that: the rotating speed of described ball milling is 200 ~ 350rpm, Ball-milling Time 20 ~ 35h.
8. preparation method according to claim 2, is characterized in that: the pressure of described compacting is 200 ~ 350MPa, dwell time 20 ~ 40min.
9. preparation method according to claim 2, is characterized in that: the temperature of described sintering is 1450 ~ 1550 DEG C, soaking time 120 ~ 180min.
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| CN201610003039.8A CN105441765B (en) | 2016-01-05 | 2016-01-05 | Bullet high-specific gravity tungsten alloy and preparation method thereof |
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| CN108504916A (en) * | 2018-04-27 | 2018-09-07 | 华南理工大学 | Precision instrument high abrasion tungalloy powder material and preparation method thereof |
| CN110358941A (en) * | 2019-08-12 | 2019-10-22 | 河南科技大学 | A kind of tungsten alloy material and preparation method thereof |
| CN111014650A (en) * | 2019-11-22 | 2020-04-17 | 有研工程技术研究院有限公司 | High-tungsten-content amorphous spherical iron-based powder for shielding gamma rays and neutrons and preparation method thereof |
| CN112481539A (en) * | 2020-11-12 | 2021-03-12 | 苏州欧美克合金工具有限公司 | High-specific-gravity tungsten alloy material and preparation method thereof |
| CN110527885B (en) * | 2019-09-02 | 2021-04-20 | 广州市华司特合金制品有限公司 | Tungsten alloy material |
| CN113649579A (en) * | 2021-08-18 | 2021-11-16 | 北京理工大学 | Composite energetic fragment containing tough outer layer and brittle inner layer and preparation method thereof |
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| CN108504916A (en) * | 2018-04-27 | 2018-09-07 | 华南理工大学 | Precision instrument high abrasion tungalloy powder material and preparation method thereof |
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| CN111014650A (en) * | 2019-11-22 | 2020-04-17 | 有研工程技术研究院有限公司 | High-tungsten-content amorphous spherical iron-based powder for shielding gamma rays and neutrons and preparation method thereof |
| CN111014650B (en) * | 2019-11-22 | 2022-08-23 | 有研工程技术研究院有限公司 | High-tungsten-content amorphous spherical iron-based powder for shielding gamma rays and neutrons and preparation method thereof |
| CN112481539A (en) * | 2020-11-12 | 2021-03-12 | 苏州欧美克合金工具有限公司 | High-specific-gravity tungsten alloy material and preparation method thereof |
| CN113649579A (en) * | 2021-08-18 | 2021-11-16 | 北京理工大学 | Composite energetic fragment containing tough outer layer and brittle inner layer and preparation method thereof |
| CN113881881A (en) * | 2021-09-08 | 2022-01-04 | 华南理工大学 | High-strength high-specific gravity tungsten alloy material and preparation method thereof |
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