CN105251992A - Preparation method of alloy counterweight block injected and molded by powder - Google Patents
Preparation method of alloy counterweight block injected and molded by powder Download PDFInfo
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- CN105251992A CN105251992A CN201510833366.1A CN201510833366A CN105251992A CN 105251992 A CN105251992 A CN 105251992A CN 201510833366 A CN201510833366 A CN 201510833366A CN 105251992 A CN105251992 A CN 105251992A
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- balancing weight
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- binding agent
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- 239000000956 alloy Substances 0.000 title claims abstract description 34
- 239000000843 powder Substances 0.000 title claims abstract description 32
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000005238 degreasing Methods 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000008188 pellet Substances 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 10
- 239000003350 kerosene Substances 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims description 24
- 239000011230 binding agent Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 11
- 239000000428 dust Substances 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 9
- -1 polyethylene Polymers 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004203 carnauba wax Substances 0.000 claims description 4
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 239000004200 microcrystalline wax Substances 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 239000012188 paraffin wax Substances 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- OWUGOENUEKACGV-UHFFFAOYSA-N [Fe].[Ni].[W] Chemical compound [Fe].[Ni].[W] OWUGOENUEKACGV-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract 1
- 239000002270 dispersing agent Substances 0.000 description 10
- 239000000314 lubricant Substances 0.000 description 8
- 239000004014 plasticizer Substances 0.000 description 4
- 239000003381 stabilizer Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
The invention relates to a preparation method of a tungsten-nickel-iron alloy counterweight block injected and molded by metal powder. A preparation method of an alloy counterweight block injected and molded by powder comprises the following steps in sequence: pelleting by blending metal powder with an adhesive in an internal mixer to form pellets with rheological properties; injecting and molding by injecting the pellets into a die cavity with the shape of the alloy counterweight block to form a blank part; degreasing by removing part of the adhesive in the blank part, in which a degreasing solvent is aviation kerosene; and sintering by removing the adhesive to obtain the alloy counterweight block. The preparation method of the tungsten-nickel-iron alloy counterweight block injected and molded by the metal powder has the advantages that the degreasing rate is high, and the product is excellent in performance and low in production cost.
Description
Technical field
The present invention relates to a kind of preparation method of tungsten nickel iron alloy balancing weight of metal powder injection molding.
Background technology
The alloy balancing weight of traditional 3D shape complexity generally adopts iron-nickel alloy material to make, production will pass through a series of equipment investment, such as machining center, punch press, milling machine, accurate puncher, Linear cut etc., the equipment needing input a large amount of is artificial, there is the problem of the low waste resource of production cost high yield, especially due to alloy balancing weight 3D shape complexity, therefore difficulty of processing is high, metallic powder injection moulding process is adopted to solve the problem, but adopt metallic powder injection moulding process easily to affect the performance of product due to the problem of degreasing rate.
Summary of the invention
The object of the invention is to provide a kind of degreasing rate high, good product performance, the preparation method of the powder injection-molded alloy balancing weight that production cost is low.
In order to realize foregoing invention object, present invention employs following technical scheme:
The preparation method of the injection molding alloy balancing weight in end, step comprises the following steps successively:
(1) granulate, metal dust and binding agent are undertaken blended by banbury, becomes the pellet with rheological characteristic; By pellet mass ratio, metal dust is 95.2%, and binding agent is 4.8%; Metal dust is mixed by following component in mass ratio: W95%, Ni3.5%, Fe1.5%; Binding agent is mixed by following component: binding agent is mixed by following component: palm wax 12%, microwax 12%, stearic acid 1.5%, polyethylene 8.5%, polypropylene 15%, polyethylene glycol 2%, vinyl acetate 1%, surplus are paraffin;
(2) injection moulding, injects the mold cavity with alloy balancing weight shape by pellet and forms blank;
(3) degreasing, removes the portion of binder in blank; Degreasing solvent is aviation kerosine;
(4) sinter, remove binding agent, obtain alloy balancing weight; Sintering process curve is as follows: room temperature starts to be heated to 400 DEG C, and insulation, is then heated to 600 DEG C from 400 DEG C, insulation, then is heated to 1150 DEG C from 600 DEG C, and insulation, is then heated to 1450 DEG C, and insulation, Ran Hou Sui stove is chilled to 90 DEG C of-110 DEG C of blow-ons.
As preferably, banburying temperature 180 degree, banburying after 3 hours naturally cooling obtain the mobility of pellet, through screw extruder extrusion granulator.
As preferably, use debinding furnace degreasing, debinding furnace internal solvent temperature is 43 DEG C-55 DEG C.
As preferably, room temperature starts to heat 3 DEG C/min to 400 DEG C, temperature retention time 1 hour, then from 400 DEG C of heating 3.5 DEG C/min to 600 DEG C of insulation 30min, again from 600 DEG C of heating 5.5 DEG C/min to 1150 DEG C of insulation 20-30min, then be heated to 1450 DEG C of insulations 2 hours, Ran Hou Sui stove is chilled to 100 DEG C of blow-ons.
Have employed the preparation method of the powder injection-molded alloy balancing weight of technique scheme, palm wax, microwax and paraffin are as dispersant, dispersant can improve the interaction between powder and polymer, strengthening powder disperses in the polymer, the object of dispersant is arranged in medium equably by powder particle to remove, to improve powder surface performance, destroy aggregate, in shaping preparation process except raising powder in media as well dispersive property, dispersant can also improve useful load and the shaping green strength of powder, and can not the mobility of deteriorated mixture.Vinyl acetate is as stabilizing agent, and stabilizing agent makes molding structure uniform and stable for a long time.Polypropylene, polyethylene and polyethylene glycol are as plasticizer, and plasticizer increases molded plastic, changes shaping rheological behaviour.Stearic acid is as lubricant, and lubricant reduces various rubbing action.Degreasing solvent adopts aviation kerosine, and the extrusion rate of dispersant and lubricant reaches 99%.Aviation kerosine degreasing is stripped of dispersant and the lubricant of 99%, make between each powder, to have had certain gap so greatly accelerate the speed of sintering thermal debinding in early stage, in the process of insulation 400 DEG C time, dispersant and lubricant are removed totally, in the process of 600 DEG C of insulations, stabilizing agent and plasticizer are removed, in the process of 1150 DEG C of insulations, remove remained binding agent be completely warmed up to 1450 DEG C of insulations again, make product reach iron-nickel alloy density of material and other performance.The powder injection-molded alloy balancing weight adopting above-mentioned preparation method to obtain, its performance parameter is as follows: density: 98%g/cm
3; Yield strength: 900MPa; Hardness: HRC37.In sum, the advantage of the preparation method of this powder injection-molded alloy balancing weight is that degreasing rate is high, and good product performance, production cost is low.
Detailed description of the invention
The following specific embodiments of the present invention is to make a detailed explanation.
The preparation method of powder injection-molded alloy balancing weight, step comprises the following steps successively:
(1) granulate, undertaken blended, banburying temperature 180 degree by metal dust and binding agent by banbury, banburying cools the mobility obtaining pellet naturally after 3 hours, through screw extruder extrusion granulator, become the pellet with rheological characteristic; Metal dust is 95.2%, and binding agent is 4.8%; Metal dust is mixed by following component in mass ratio: W95%, Ni3.5%, Fe1.5%; Binding agent is mixed by following component: binding agent is mixed by following component: palm wax 12%, microwax 12%, stearic acid 1.5%, polyethylene 8.5%, polypropylene 15%, polyethylene glycol 2%, vinyl acetate 1%, surplus are paraffin;
(2) injection moulding, injects the mold cavity with alloy balancing weight shape by pellet and forms blank; Injection moulding can be produced with common plastic machine, and require that screw rod hardness is large, gun barrel temperature 1 section 145 DEG C, 2 sections 155 DEG C, 3 sections 168 DEG C, nozzle temperature 175 DEG C, mold temperature 45 DEG C-50 DEG C, screw speed 50min, buffering is apart from 10cm
3/ S, locked mode pressure 800bar, pressurize 650bar, dwell time 1s, back pressure 0bar.Avoid injection temperature more than 180 DEG C as far as possible, notice mold temperature can not higher than 55 DEG C simultaneously.During beginning, screw rod first-selection uses low-shearing force, and pressure ratio is 1.6:1, maximum pressure than for 2:1 because pressure crosses conference make blank demoulding difficulty, the problem appearance such as the serious and die wear of burr;
(3) degreasing, removes the portion of binder in blank; Use debinding furnace degreasing, degreasing solvent is aviation kerosine, stove internal solvent temperature 43 DEG C-55 DEG C, solvent flow rate 30ml/h, and the extrusion rate of dispersant and lubricant is 99%;
(4) sinter, remove binding agent, obtain alloy balancing weight; Room temperature starts to heat 3 DEG C/min to 400 DEG C, temperature retention time 1 hour, then from 400 DEG C of heating 3.5 DEG C/min to 600 DEG C of insulation 30min, again from 600 DEG C of heating 5.5 DEG C/min to 1150 DEG C of insulation 20-30min, then be heated to 1450 DEG C of insulations 2 hours, Ran Hou Sui stove is chilled to about 100 DEG C blow-ons.Due to solvent degreasing in early stage be stripped of 99% dispersant and lubricant make between product powder and powder, to have had certain gap thus greatly accelerate sinter early stage thermal debinding speed, at 400 DEG C, in the temperature retention time process of 1 hour, dispersant and lubricant are removed totally.In 600 DEG C of insulations process of 30 minutes, stabilizing agent and plasticizer are removed, 1150 DEG C of insulations within 20 minutes, to remove completely in process in product the adhesive that remains, be warmed up to 1450 DEG C of insulations 2 hours again, powder injection-molded alloy balancing weight reaches density and other performance of the alloy balancing weight of iron-nickel alloy material.
The powder injection-molded alloy balancing weight adopting above-mentioned preparation method to obtain, its performance parameter is as follows: sintering post-shrinkage ratio: about 1.24; Density: 98%g/cm
3; Hot strength: 900MPa; Hardness: HRC37.The alloy balancing weight performance parameter of the iron-nickel alloy material of traditional W95Ni3.5Fe1.5 is as follows: density:>=94g/cm
3; Hot strength: 750MPa; Hardness: HRC35.5.Said method solves the complex-shaped alloy balancing weight need of production large number quipments of conventional three-dimensional and drops into, and solves difficulty of processing large, and 3D shape is complicated, the series of problems such as Density inhomogeneity.Advantage is that processing technology is simple, with short production cycle, stable performance, by mould one-shot forming, and degreasing, sintering.Have employed metallic powder injection moulding process, adopt above-mentioned metal powder component and binder component, coordinate above-mentioned technique, namely solve the problem of the performance easily affecting product due to binding agent degreasing rate, also ensure that the performance parameters of powder injection-molded alloy balancing weight reaches the alloy balancing weight of traditional iron-nickel alloy material.
Claims (4)
1. the preparation method of powder injection-molded alloy balancing weight, is characterized in that step comprises the following steps successively:
(1) granulate, metal dust and binding agent are undertaken blended by banbury, becomes the pellet with rheological characteristic; By pellet mass ratio, metal dust is 95.2%, and binding agent is 4.8%; Metal dust is mixed by following component in mass ratio: W95%, Ni3.5%, Fe1.5%; Binding agent is mixed by following component: binding agent is mixed by following component: palm wax 12%, microwax 12%, stearic acid 1.5%, polyethylene 8.5%, polypropylene 15%, polyethylene glycol 2%, vinyl acetate 1%, surplus are paraffin;
(2) injection moulding, injects the mold cavity with alloy balancing weight shape by pellet and forms blank;
(3) degreasing, removes the portion of binder in blank; Degreasing solvent is aviation kerosine;
(4) sinter, remove binding agent, obtain alloy balancing weight; Sintering process curve is as follows: room temperature starts to be heated to 400 DEG C, and insulation, is then heated to 600 DEG C from 400 DEG C, insulation, then is heated to 1150 DEG C from 600 DEG C, and insulation, is then heated to 1450 DEG C, and insulation, Ran Hou Sui stove is chilled to 90 DEG C of-110 DEG C of blow-ons.
2. the preparation method of powder injection-molded alloy balancing weight according to claim 1, is characterized in that banburying temperature 180 degree, and banburying cools the mobility obtaining pellet naturally after 3 hours, through screw extruder extrusion granulator.
3. the preparation method of powder injection-molded alloy balancing weight according to claim 1, it is characterized in that using debinding furnace degreasing, debinding furnace internal solvent temperature is 43 DEG C-55 DEG C.
4. the preparation method of powder injection-molded alloy balancing weight according to claim 1, it is characterized in that room temperature starts to heat 3 DEG C/min to 400 DEG C, temperature retention time 1 hour, then from 400 DEG C of heating 3.5 DEG C/min to 600 DEG C of insulation 30min, again from 600 DEG C of heating 5.5 DEG C/min to 1150 DEG C of insulation 20-30min, then be heated to 1450 DEG C of insulations 2 hours, Ran Hou Sui stove is chilled to 100 DEG C of blow-ons.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510833366.1A CN105251992A (en) | 2015-11-25 | 2015-11-25 | Preparation method of alloy counterweight block injected and molded by powder |
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| CN201510833366.1A CN105251992A (en) | 2015-11-25 | 2015-11-25 | Preparation method of alloy counterweight block injected and molded by powder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052346A (en) * | 2016-12-28 | 2017-08-18 | 江苏精研科技股份有限公司 | The preparation technology of powder injection forming tungsten-nickel hard alloy |
| 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 |
| CN107716929A (en) * | 2017-08-21 | 2018-02-23 | 柳州科尔特锻造机械有限公司 | The forging method of counterweight peculiar to vessel |
| CN110883335A (en) * | 2019-11-05 | 2020-03-17 | 厦门虹鹭钨钼工业有限公司 | Preparation method of integrated tungsten alloy lure |
| CN111394603A (en) * | 2020-04-14 | 2020-07-10 | 东莞市金材五金有限公司 | Production process method of powder metallurgy W-Ni-Fe tungsten-nickel-iron alloy |
| CN114749667A (en) * | 2022-03-14 | 2022-07-15 | 上海喆航航空科技有限公司 | Method for manufacturing balance weight alloy of helicopter rotor blade |
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| CN111394603A (en) * | 2020-04-14 | 2020-07-10 | 东莞市金材五金有限公司 | Production process method of powder metallurgy W-Ni-Fe tungsten-nickel-iron alloy |
| CN114749667A (en) * | 2022-03-14 | 2022-07-15 | 上海喆航航空科技有限公司 | Method for manufacturing balance weight alloy of helicopter rotor blade |
| CN114749667B (en) * | 2022-03-14 | 2023-07-21 | 上海喆航航空科技有限公司 | Manufacturing method of helicopter rotor blade balance weight alloy |
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