CN106282624B - High-specific-gravity tungsten-based alloy and preparation method thereof - Google Patents
High-specific-gravity tungsten-based alloy and preparation method thereof Download PDFInfo
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- CN106282624B CN106282624B CN201610651843.7A CN201610651843A CN106282624B CN 106282624 B CN106282624 B CN 106282624B CN 201610651843 A CN201610651843 A CN 201610651843A CN 106282624 B CN106282624 B CN 106282624B
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 33
- 239000010937 tungsten Substances 0.000 title claims abstract description 33
- 239000000956 alloy Substances 0.000 title claims abstract description 31
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 37
- 229920006324 polyoxymethylene Polymers 0.000 claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 238000005245 sintering Methods 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 20
- 239000004033 plastic Substances 0.000 claims abstract description 20
- 238000005238 degreasing Methods 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000009837 dry grinding Methods 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 6
- 239000010439 graphite Substances 0.000 claims abstract description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 239000011733 molybdenum Substances 0.000 claims abstract description 4
- 239000011347 resin Substances 0.000 claims abstract 2
- 229920005989 resin Polymers 0.000 claims abstract 2
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 23
- 239000011354 acetal resin Substances 0.000 claims description 23
- 229910052759 nickel Inorganic materials 0.000 claims description 20
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 8
- 229920001903 high density polyethylene Polymers 0.000 claims description 8
- 239000004700 high-density polyethylene Substances 0.000 claims description 8
- 229910017604 nitric acid Inorganic materials 0.000 claims description 8
- 239000008188 pellet Substances 0.000 claims description 8
- 238000006555 catalytic reaction Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 239000003595 mist Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 3
- 238000007171 acid catalysis Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000004663 powder metallurgy Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000443 aerosol Substances 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 230000005484 gravity Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000001746 injection moulding Methods 0.000 abstract 3
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 11
- 239000005038 ethylene vinyl acetate Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 5
- 238000012387 aerosolization Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229910000863 Ferronickel Inorganic materials 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- 229910001080 W alloy Inorganic materials 0.000 description 2
- OWUGOENUEKACGV-UHFFFAOYSA-N [Fe].[Ni].[W] Chemical compound [Fe].[Ni].[W] OWUGOENUEKACGV-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229940126062 Compound A Drugs 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- 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
Abstract
The invention discloses a high-specific gravity tungsten-based alloy formed by metal injection molding and a preparation method thereof. The preparation method of the metal injection molding tungsten-based alloy comprises the following steps: (1) preparing materials; (2) dry grinding; (3) mixing; adding plastic auxiliary materials and polyformaldehyde resin into the metal mixture, and mixing; (4) injection molding; (5) catalytic degreasing; (6) vacuum sintering is carried out in a graphite furnace or a molybdenum furnace. The high specific gravity tungsten-based alloy comprises the following raw materials in parts by weight: 20-96.5% of tungsten powder; 0.25-40% of nickel powder; 0.1-40% of iron powder. The invention utilizes the process of the plastic-based system to manufacture the high-specific gravity tungsten-based product, and has better stability, difficult deformation of the product, short manufacturing period and higher efficiency.
Description
Technical field
The present invention relates to metal injection molded technical field of alloy, especially a kind of metal injection molded high-gravity tungsten
Based alloy and preparation method thereof.
Background technology
Tungsten alloy material is widely used in logical with the advantages that its density is big, good heat conductivity and ray absorption capacity are strong
Believe product scope.High-gravity tungsten based alloy is mainly made up of elements such as nickel, iron, cobalt, copper, chromium.It is existing to prepare tungsten-bast alloy
The method of material is typically powder injection-molded.
At present, made using cerul system powder injection-molded（MIM）High specific gravity product be comparative maturity technique, but
The product produced using cerul system, stability is poor, is easily deformed, and fabrication cycle is grown.It is extensive to mould matrix system
Applied to the making of MIM stainless steel products, but also in test phase in the making of tungsten base-height ratio weight product.
Main difficult point is：
1. mixing process powder surface is oxidized, the compactness of sintering is influenceed；
2. carbonyl nickel powder and carbonyl iron dust are inflammable in mixing process；
3. for catalysis degreasing stove in degreasing, concentrated nitric acid aoxidizes product surface, surface forms oxide-film, causes product to sinter
Not thoroughly, the consistency of product is influenceed；
In the prior art to avoid influence of the surface oxidation to sintering, generally lead to hydrogen sintering, equipment with molybdenum formula sintering furnace
Cost is high, and maintenance cost is also higher；Making proportion 10-16g/cm3During tungsten nickel iron alloy, ferronickel content is higher, is produced after sintering
The mechanical performance of product is relatively low.
The content of the invention
It is an object of the invention to provide a kind of high specific gravity, stability are good, on-deformable tungsten-bast alloy and its preparation side
Method.
To achieve these goals, the present invention uses following technical scheme：
A kind of preparation method of high-gravity tungsten based alloy, comprises the following steps：
（1）Dispensing：Tungsten, nickel, iron metal powder mixing are weighed by certain weight ratio, obtains mixture A；
（2）Dry grinding：Mixture A is dry grinded, is well mixed；
（3）Mixing granulator：Step will be passed through（2）The mixture A of processing is under nitrogen protection and with 10-15 turns/min speed
Degree stirring, after preheating 20-25min under the conditions of 200-210 DEG C；Heat up and add plastic cement auxiliary material and acetal resin（POM）, so
After be warming up to 230-240 DEG C after, be incubated 5-10min, POM fusing after put down pressing cover plate carry out banburying, start simultaneously at cooling, drop
Temperature is uniform and smooth to surface of material to continuation banburying 10-15min after 200-210 DEG C, then passes through screw rod after being cooled to 180-190 DEG C
It is extruded and chopped into pellet；
（4）Injection：Material is through extrusion molding in mold cavity；
（5）Degreasing；With nitric acid catalysis degreasing.
（6）Sintering：The vacuum-sintering in graphite furnace or molybdenum formula stove.
Preferably, described tungsten metal accounts for the 20-96.5% of alloy gross weight, and nickel metal accounts for the 0.25- of alloy gross weight
40%；Ferrous metal accounts for the 0.1-40% of alloy gross weight.
Preferably, the weight ratio of described nickel metal and ferrous metal is 4:6-7:3.
Preferably, step（2）The speed of middle dry grinding is that 20-30 turns/min, time 4-8h.
Preferably, described plastic cement auxiliary material includes HDPE（High density polyethylene (HDPE)）、 EVA（Ethylene-vinyl acetate）, wax
And SA（Stearic acid）.
Preferably, the weight ratio of acetal resin and plastic cement auxiliary material is 88:12-84:16, wherein, HDPE in plastic cement auxiliary material:
EVA:Wax:SA weight ratio is 7:2:2:1, the total addition level of acetal resin and plastic cement auxiliary material is the 8%- of metal dust weight
12%。
Preferably, step（4）Used injection machine need to use powder metallurgy bolt special, the temperature of gun barrel when it is molded
160-200 DEG C is set in, injection pressure is 80-130Bar, and injection speed is in 35%-70%.
Preferably, step（5）Degreasing be catalysis degreasing, be carried out in three steps, the first step：Furnace chamber is purged with nitrogen, by stove
The air of intracavitary excludes clean；Second step, it will be passed through after pure nitric acid aerosolization in furnace chamber, make itself and the acetal resin in product
Chemical reaction is produced, the acetal resin that MIM is molded in base more than 85% is decomposed into formaldehyde gas discharge；3rd step：Use nitrogen
Furnace chamber is rinsed, the acid mist remained in furnace chamber is rinsed well.
Preferably, step（6）Final vacuum≤0.1Pa of middle sintering furnace.Sintering is divided into three phases：First stage,
Below 800 DEG C, the acetal resin and plastic cement auxiliary material that are remained after degreasing in product blank gasify discharge at high temperature；Second-order
Section, at 800-1420 DEG C, nickel metal and ferrous metal in blank form liquid phase at high temperature, and tungsten metal is incorporated wherein, burnt
Form type；Phase III, in-furnace temperature is cooled to after less than 70 DEG C and takes out product.Sintering time is 23-26h.
A kind of high-gravity tungsten based alloy, including following raw material by weight：
Tungsten powder 20-96.5%
Nickel by powder 0.25-40%
Iron powder 0.1-40%
Preferably, the weight ratio of described nickel metal and ferrous metal is 4:6-7:3.
In tungsten nickel iron alloy, the sintering temperature of tungsten is higher, it is difficult to which direct sintering is molded, and nickel and iron burn as Binder Phase
During knot, tungsten particle is bonded together to form alloy by nickel and iron fusing, and iron can reduce solubility of the tungsten in nickel, effectively prevent
β brittlement phases are formed, so as to improve the intensity of tungsten alloy and toughness.The present inventor passes through research and found, the part by weight of nickel and iron
4:6 to 7:When between 3, the liquid phase of nickel and iron in sintering is substantially coincident, best to the dissolubility of tungsten, so as to improve product
Intensity.
Because ferronickel powder meets high temperature easy firing, the present invention takes at low temperature（200-210℃）It is auxiliary to be initially added into plastic cement
Material and POM so that metal dust is well mixed at a lower temperature with plastic cement auxiliary material, POM, is then warming up to 230-240 again
DEG C heating after be incubated, dissolve POM.Then cooling banburying is carried out, avoids POM from volatilizing, and influences feeding quality.
Material injection temperature is 180-190 DEG C, and material toughness is low, and mold cavity is easier to clean, while can avoid again
Cause material to be fully cured because temperature of charge is too low, and can not extrude.
Beneficial effects of the present invention：
The present invention makes high-gravity tungsten base product using the technique for moulding matrix system, and stability is more preferable, product is unlikely to deform,
Fabrication cycle is short, more efficient.
Embodiment
Embodiment is described in further detail to the present invention below.Following examples are used to illustrate the present invention, but do not have to
To limit the scope of the present invention.
Embodiment 1
A kind of preparation method of high-gravity tungsten based alloy, comprises the following steps：
（1）Dispensing, 7.31kg tungsten powder, 1.88kg nickel by powder, 0.81kg iron powder mix are weighed, is mixed
Compound A；
（2）Dry grinding：Mixture A is dry grinded, speed is 30 turns/min, and dry grind 6h, is well mixed；
（3）Mixing granulator：Step will be passed through（2）The mixture A of processing is stirred with 15 turns/min speed under nitrogen protection
Mix, after preheating 25min under the conditions of 200 DEG C；Heat up and add 107.2g plastic cement auxiliary material (HDPE:EVA:Wax:SA weight
Than for 7:2:2:1) and 785g acetal resin（POM）, after then heating to 230 DEG C, 10min is incubated, is put down after POM fusings
Pressing cover plate and carry out banburying, start simultaneously at cooling, continuation banburying 15min is uniform and smooth to surface of material after being cooled to 200 DEG C, then
By Screw Extrusion and pellet is cut into after being cooled to 180 DEG C；
（4）Injection：Required according to product size and Material shrinkage rate after making mould, mould is fitted into injection machine, will
Step（3）The pellet of preparation is put into injection machine hopper, is injected in mold cavity the material of fusing by gun barrel, is allowed into
Type；Specific injection parameterses include：The temperature of gun barrel is set in 160-200 DEG C, and injection pressure is 80-130Bar, injection speed
In 35%-70%；
（5）Degreasing：Catalysis degreasing is carried out in three steps, the first step：Furnace chamber is purged with nitrogen, the air in furnace chamber is excluded dry
Only；It second step, will be passed through after pure nitric acid aerosolization in furnace chamber, it is produced chemical reaction with the acetal resin in product, will
More than 80% acetal resin is decomposed into formaldehyde gas discharge in MIM injection bases；3rd step：Furnace chamber is purged with nitrogen, by furnace chamber
The acid mist of interior residual is rinsed well；
（6）Sintering：The vacuum-sintering in graphite furnace, sinter and be divided into three phases, the first stage, below 800 DEG C, degreasing
The acetal resin and plastic cement auxiliary material remained afterwards in product blank gasifies discharge at high temperature；Second stage, at 800-1410 DEG C
When, nickel metal and ferrous metal in blank form liquid phase at high temperature, tungsten metal are incorporated wherein, sinter molding；Phase III,
In-furnace temperature is cooled to after less than 70 DEG C and takes out product；Sintering time is 23-26h.
The high-gravity tungsten based alloy obtained using above-mentioned preparation method, its performance parameter are as follows：
Product density：14±0.1g/cm3
Product hardness：HRC25±5.
Embodiment 2
A kind of preparation method of high-gravity tungsten based alloy, comprises the following steps：
（1）Dispensing, 9.65kg tungsten powder, 0.24kg nickel by powder, 0.11kg iron powder mix are weighed, is mixed
Thing A；
（2）Dry grinding：Mixture A is dry grinded, speed is 30 turns/min, and dry grind 6h, is well mixed；
（3）Mixing granulator：Step will be passed through（2）The mixture A of processing is stirred with 15 turns/min speed under nitrogen protection
Mix, after preheating 20min under the conditions of 210 DEG C；Heat up and add 148g plastic cement auxiliary material (HDPE:EVA:Wax:SA weight ratio
For 7:2:2:1) and 778g acetal resin（POM）, after then heating to 240 DEG C, 5min is incubated, pressure is put down after POM fusings
Closing lid plate carries out banburying, starts simultaneously at cooling, and continuation banburying 10min is uniform and smooth to surface of material after being cooled to 210 DEG C, then drops
Temperature is to by Screw Extrusion and being cut into pellet after 190 DEG C；
（4）Injection：Required according to product size and Material shrinkage rate after making mould, mould is fitted into injection machine, will
Step（3）The pellet of preparation is put into injection machine hopper, is injected in mold cavity the material of fusing by gun barrel, is allowed into
Type.Specific injection parameterses include：The temperature of gun barrel is set in 160-200 DEG C, and injection pressure is 80-130Bar, injection speed
In 35%-70%；
（5）Degreasing：Catalysis degreasing is carried out in three steps, the first step：Furnace chamber is purged with nitrogen, the air in furnace chamber is excluded dry
Only；It second step, will be passed through after pure nitric acid aerosolization in furnace chamber, it is produced chemical reaction with the acetal resin in product, will
More than 85% acetal resin is decomposed into formaldehyde gas discharge in MIM injection bases；3rd step：Furnace chamber is purged with nitrogen, by furnace chamber
The acid mist of interior residual is rinsed well；
（6）Sintering：The vacuum-sintering in graphite furnace, sinter and be divided into three phases, the first stage, below 800 DEG C, degreasing
The acetal resin and plastic cement auxiliary material remained afterwards in product blank gasifies discharge at high temperature；Second stage, at 800-1410 DEG C
When, nickel metal and ferrous metal in blank form liquid phase at high temperature, tungsten metal are incorporated wherein, sinter molding；Phase III,
In-furnace temperature is cooled to after less than 70 DEG C and takes out product；Sintering time is 23-26h.
The high-gravity tungsten based alloy obtained using above-mentioned preparation method, its performance parameter are as follows：
Product density：18±0.1g/cm3
Product hardness：HRC25±5.
Embodiment 3
A kind of preparation method of high-gravity tungsten based alloy, comprises the following steps：
（1）Dispensing, 6kg tungsten powder, 2.8kg nickel by powder, 1.2kg iron powder mix are weighed, obtains mixture A；
（2）Dry grinding：Mixture A is dry grinded, speed is 30 turns/min, and dry grind 6h, is well mixed；
（3）Mixing granulator：Step will be passed through（2）The mixture A of processing is stirred with 10 turns/min speed under nitrogen protection
Mix, after preheating 25min under the conditions of 205 DEG C；Heat up and add 123g plastic cement auxiliary material (HDPE:EVA:Wax:SA weight ratio
For 7:2:2:1) and 900g acetal resin（POM）, after then heating to 235 DEG C, 5-10min is incubated, is put down after POM fusings
Press cover plate and carry out banburying, start simultaneously at cooling, continuation banburying is uniform and smooth to surface of material after being cooled to 205 DEG C, then cools
By Screw Extrusion and pellet is cut into after to 185 DEG C；
（4）Injection：Required according to product size and Material shrinkage rate after making mould, mould is fitted into injection machine, will
Step（3）The pellet of preparation is put into injection machine hopper, is injected in mold cavity the material of fusing by gun barrel, is allowed into
Type.Specific injection parameterses include：The temperature of gun barrel is set in 160-200 DEG C, and injection pressure is 80-130Bar, injection speed
In 35%-70%；
（5）Degreasing：Catalysis degreasing is carried out in three steps, the first step：Furnace chamber is purged with nitrogen, the air in furnace chamber is excluded dry
Only；It second step, will be passed through after pure nitric acid aerosolization in furnace chamber, it is produced chemical reaction with the acetal resin in product, will
More than 85% acetal resin is decomposed into formaldehyde gas discharge in MIM injection bases；3rd step：Furnace chamber is purged with nitrogen, by furnace chamber
The acid mist of interior residual is rinsed well；
（6）Sintering：The vacuum-sintering in graphite furnace, sinter and be divided into three phases, the first stage, below 800 DEG C, degreasing
The acetal resin and plastic cement auxiliary material remained afterwards in product blank gasifies discharge at high temperature；Second stage, at 800-1410 DEG C
When, nickel metal and ferrous metal in blank form liquid phase at high temperature, tungsten metal are incorporated wherein, sinter molding；Phase III,
In-furnace temperature is cooled to after less than 70 DEG C and takes out product；Sintering time is 23-26h.
The high-gravity tungsten based alloy obtained using above-mentioned preparation method, its performance parameter are as follows：
Product density：12±0.1g/cm3
Product hardness：HRC25±5.
Claims (5)
1. a kind of preparation method of high-gravity tungsten based alloy, it is characterised in that comprise the following steps：
(1) dispensing：By tungsten powder and carbonyl nickel powder of the particle diameter for 2-3 μm, carbonyl iron dust mixing, mixture A is obtained；
(2) dry grind：Mixture A is dry grinded, is well mixed；
(3) mixing granulator：Mixture A by step (2) processing is turned under nitrogen protection and with 10-15/min speed stirs
Mix, after preheating 20-25min under the conditions of 200-210 DEG C；Heat up and add plastic cement auxiliary material and acetal resin, be warming up to 230-
After 240 DEG C, be incubated 5-10min, acetal resin fusing after carry out banburying, start simultaneously at cooling, be cooled to 200-210 DEG C it is follow-up
Continuous banburying 10-15min is uniform and smooth to surface of material, then by Screw Extrusion and is cut into pellet after being cooled to 180-190 DEG C；
(4) it is molded：Material is through extrusion molding in mold cavity；
(5) degreasing：With nitric acid catalysis degreasing；
(6) sinter：The vacuum-sintering in graphite furnace or molybdenum formula stove；
Tungsten powder accounts for the 20% -96.5% of alloy gross weight, and nickel by powder accounts for the 0.25%-40% of alloy gross weight, and iron powder accounts for
The 0.1%-40% of alloy gross weight, wherein, the weight ratio of described nickel metal and ferrous metal is 4:6-7:3；
The weight ratio of acetal resin and plastic cement auxiliary material is 88:12-84:16；Wherein, HDPE in plastic cement auxiliary material:EVA:Wax:SA's
Weight ratio is 7:2:2:1, the total addition level of acetal resin and plastic cement auxiliary material is the 8%-12% of metal dust weight.
2. the preparation method of high-gravity tungsten based alloy according to claim 1, it is characterised in that dry grinding in step (2)
Speed is that 20-30 turns/min, time 4-8h.
3. the preparation method of high-gravity tungsten based alloy according to claim 1, it is characterised in that used in step (4)
Injection machine need to use powder metallurgy bolt special, and the temperature of gun barrel is set in 160-200 DEG C when it is molded, and injection pressure is 80-
130Bar, injection speed is in 35%-70%.
4. the preparation method of high-gravity tungsten based alloy according to claim 1, it is characterised in that the catalysis of step (5) takes off
Fat is carried out in three steps, the first step：Furnace chamber is purged with nitrogen, the air in furnace chamber is excluded clean；Second step, by pure nitric acid aerosol
Be passed through after change in furnace chamber, itself and acetal resin in product is produced chemical reaction, by MIM be molded in base more than 85% it is poly-
Formaldehyde resin is decomposed into formaldehyde gas discharge；3rd step：Furnace chamber is purged with nitrogen, the acid mist remained in furnace chamber is rinsed well.
5. the preparation method of high-gravity tungsten based alloy according to claim 1, it is characterised in that sintering furnace in step (6)
Final vacuum≤0.1Pa.
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| CN107557642A (en) * | 2017-09-14 | 2018-01-09 | 江苏新誉航空精密机械制造有限公司 | Alloy for balancing weight and preparation method thereof and balancing weight |
| CN108393485B (en) * | 2018-03-02 | 2020-03-20 | 厦门钨业股份有限公司 | Tungsten alloy feed for powder injection molding and preparation method thereof |
| CN110093544B (en) * | 2019-05-30 | 2020-10-09 | 陕西理工大学 | Preparation method of multistage strip-shaped crystal tungsten alloy material |
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| CN115161642B (en) * | 2022-08-11 | 2023-10-27 | 常州百事瑞机电设备有限公司 | High specific gravity tungsten-based alloy etchant and preparation and use methods thereof |
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| US6478842B1 (en) * | 2000-07-19 | 2002-11-12 | R. A. Brands, Llc | Preparation of articles using metal injection molding |
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| CN102787249B (en) * | 2012-09-07 | 2014-05-14 | 洛阳高新四丰电子材料有限公司 | Sintering process for preparing high-density tungsten ferro-nickel alloy |
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| KR101534389B1 (en) * | 2013-05-23 | 2015-07-09 | 주식회사 쎄타텍 | A method for powder injection molding |
| CN104174854B (en) * | 2014-07-14 | 2016-08-24 | 昆山安泰美科金属材料有限公司 | A kind of method preparing miniature tungsten-bast alloy part |
| CN104227003B (en) * | 2014-09-01 | 2015-09-30 | 东莞劲胜精密组件股份有限公司 | The preparation method of Feedstock of Powder Injection Molding |
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