CN104325141A - Injection molding method of powder metallurgy material - Google Patents
Injection molding method of powder metallurgy material Download PDFInfo
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- CN104325141A CN104325141A CN201410571083.XA CN201410571083A CN104325141A CN 104325141 A CN104325141 A CN 104325141A CN 201410571083 A CN201410571083 A CN 201410571083A CN 104325141 A CN104325141 A CN 104325141A
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- 239000000463 material Substances 0.000 title claims abstract description 40
- 238000001746 injection moulding Methods 0.000 title claims abstract description 33
- 238000004663 powder metallurgy Methods 0.000 title abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 31
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011812 mixed powder Substances 0.000 claims abstract description 16
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims abstract description 8
- 239000010935 stainless steel Substances 0.000 claims abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 8
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims abstract description 8
- 239000011261 inert gas Substances 0.000 claims abstract description 5
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 239000012948 isocyanate Substances 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- IJVRPNIWWODHHA-UHFFFAOYSA-N 2-cyanoprop-2-enoic acid Chemical compound OC(=O)C(=C)C#N IJVRPNIWWODHHA-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 4
- 238000003825 pressing Methods 0.000 abstract 3
- 239000000047 product Substances 0.000 abstract 2
- -1 2-cyan ethyl Chemical group 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000012467 final product Substances 0.000 abstract 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 235000016804 zinc Nutrition 0.000 description 6
- 150000003926 acrylamides Chemical class 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention discloses an injection molding method of a powder metallurgy material. The injection molding method comprises the following steps of adding water atomized iron powder, reduced iron powder, stainless steel powder, zinc oxide powder and titanium tetrachloride powder into a grinding machine; grinding to obtain mixed powder; adding ethylene carbonate, 2-cyan ethyl acrylate, polyvinyl butyral, acrylamide and toluene diisocynate into a mixing agitator; uniformly agitating to obtain a mixture I; adding the mixed powder into the mixture I; agitating and mixing uniformly and putting the mixture into a mold; heating, pressing and molding under a vacuum condition to obtain a pressing blank; heating the pressing blank under the protection condition of inert gas for a certain time to obtain a primary product; and finally, heating the primary product under a vacuum condition, heating and preserving heat, and cooling to the room temperature to obtain the powder metallurgy material. According to the injection molding method of the powder metallurgy material, the problem that materials are not uniformly mixed in a production process is solved; the density of a final product is improved, the tensile strength is enhanced and the surface hardness is improved.
Description
Technical field
The invention belongs to powder metallurgical technology, be specifically related to a kind of powdered metallurgical material injection moulding method.
Background technology
Powder metallurgy injection molding technique (linjection moulding is called for short MIM) is a kind of novel manufacturing process technology combined with plastic injection moulding process by powder metallurgy, this technique is applicable to the manufacture of producing miniature precision 3D shape complexity in enormous quantities and having the metallic element that property requires, sintered products not only has the complicated shape the same with the goods that injection-moulding plastic obtains and high accuracy, and there is forge piece close physics, chemical property and mechanical performance.It can manufacture most refractory metal and compound thereof, porous material, and it is few that it has blank than casting technique product, does not need or seldom needs machining subsequently, therefore greatly can save metal material, reduces product cost.
The feature of powder metallurgy injection molding technique is, a kind of parts novel forming technology that prior powder metallurgy technology mainly combines with modern plastics injection molding technique and formed by powder metallurgy injection moulding, it can directly produce the parts with net shape, reduce engine processing capacity and saving raw material, solve the problem of the complicated shape article formation difficulty always perplexing field of powder metallurgy for many years to greatest extent; And the adaptability for materials of this technology is wide, every this technology all available such as metal, alloy, pottery can making powder makes parts.In addition, this technology can also realize full-automatic continuous seepage, and production efficiency is high, excellent material performance, and product size precision is high, therefore in widespread attention.The iron density that current use adopts powder metallurgy injection molding technique to prepare can reach 6.5-7g/cm
3left and right, tensile property is not high yet, and case hardness is also difficult to satisfy the demand, and therefore needs the better powdered metallurgical material of combination property to meet market demand.
Summary of the invention
The object of the invention is to provide a kind of powdered metallurgical material injection moulding method to overcome above the deficiencies in the prior art, solve the problem that batch mixing in production process is uneven, final products density is improved, and hot strength strengthens, and improves case hardness simultaneously.
The present invention is realized by following technological means:
A kind of powdered metallurgical material injection moulding method, carries out according to following steps:
Step one, with parts by weight, joins in grinder by 40-50 part water-atomized iron powder, 20-30 part reduced iron powder, 5-10 part stainless steel powder, 2-6 part oxide powder and zinc and 3-6 part titanium tetrachloride powder, and grinding obtains the mixed-powder that particle diameter is 100-200 μm;
Step 2, with parts by weight, 3-8 part ethylene carbonate, 5-10 part 2-cyanacrylate, 2-6 part polyvinyl butyral resin, 1-4 part acrylamide and 1-4 part toluene di-isocyanate(TDI) are joined in mixing and blending machine, is uniformly mixed, obtains mixture one;
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two;
Step 4, puts into mould by mixture two, is under the condition of 0.01-0.05MPa in vacuum, compressing at being heated to 160-180 DEG C, obtains pressed compact;
Step 5, is heated to 350-380 DEG C by pressed compact under the condition of inert gas shielding, keeps 40-60 minute, obtains first product;
First product is be heated to 1150-1200 DEG C under the condition of 0.001-0.004MPa in vacuum by step 6, and insulation 200-250 minute, is then down to room temperature, obtains powdered metallurgical material.
Described powdered metallurgical material injection moulding method, the condition be uniformly mixed in step 2 can be mixing speed 130-150 rev/min, whipping temp 60-70 DEG C, mixing time 30-50 minute.
Described powdered metallurgical material injection moulding method, the speed that is uniformly mixed in step 3 can be 80-100 rev/min, and mixing time can be 20-30 minute.
Described powdered metallurgical material injection moulding method, pressure compressing in step 4 can be 800-900MPa.
Described powdered metallurgical material injection moulding method, in step 5, inert gas can be nitrogen or argon gas.
Described powdered metallurgical material injection moulding method, step 6 temperature-fall period can be first Temperature fall to after 400-500 DEG C, then is down to room temperature with the speed of 80-100 DEG C/min.
The powdered metallurgical material density that powdered metallurgical material injection moulding method provided by the invention obtains reaches 7.65g/cm
3above, hot strength reaches more than 1320MPa, and percentage elongation reaches 4.2-4.5%, and case hardness reaches more than 700HV, has good wearability and hardness, has certain ductility simultaneously, can be advantageously applied to every field.
Detailed description of the invention
Embodiment 1
A kind of powdered metallurgical material injection moulding method, carries out according to following steps:
40 parts of water-atomized iron powders, 20 parts of reduced iron powders, 5 parts of stainless steel powders, 2 parts of oxide powder and zincs and 3 parts of titanium tetrachloride powder, with parts by weight, are joined in grinder by step one, and grinding obtains the mixed-powder that particle diameter is 100 μm;
Step 2, with parts by weight, 3 parts of ethylene carbonates, 5 parts of 2-cyanacrylates, 2 parts of polyvinyl butyral resins, 1 part of acrylamide and 1 part of toluene di-isocyanate(TDI) are joined in mixing and blending machine, be uniformly mixed, wherein mixing speed is 130 revs/min, whipping temp 60 DEG C, mixing time 30 minutes, obtains mixture one;
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and the speed that is wherein uniformly mixed is 80 revs/min, and mixing time is 20 minutes;
Step 4, puts into mould by mixture two, and be under the condition of 0.01MPa in vacuum, compressing at being heated to 160 DEG C, pressure is 800MPa, obtains pressed compact;
Step 5, is heated to 350 DEG C by pressed compact, keeps 40 minutes, obtain first product under the condition of nitrogen or argon shield;
Step 6, is be heated to 1150 DEG C under the condition of 0.001MPa in vacuum by first product, is incubated 200 minutes, is then down to room temperature, obtains powdered metallurgical material.
Embodiment 2
A kind of powdered metallurgical material injection moulding method, carries out according to following steps:
43 parts of water-atomized iron powders, 25 parts of reduced iron powders, 6 parts of stainless steel powders, 3 parts of oxide powder and zincs and 4 parts of titanium tetrachloride powder, with parts by weight, are joined in grinder by step one, and grinding obtains the mixed-powder that particle diameter is 120 μm;
Step 2, with parts by weight, 4 parts of ethylene carbonates, 7 parts of 2-cyanacrylates, 3 parts of polyvinyl butyral resins, 2 parts of acrylamides and 2 parts of toluene di-isocyanate(TDI)s are joined in mixing and blending machine, be uniformly mixed, wherein mixing speed is 135 revs/min, whipping temp 66 DEG C, mixing time 38 minutes, obtains mixture one;
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and the speed that is wherein uniformly mixed is 90 revs/min, and mixing time is 25 minutes;
Step 4, puts into mould by mixture two, and be under the condition of 0.02MPa in vacuum, compressing at being heated to 165 DEG C, pressure is 830MPa, obtains pressed compact;
Step 5, is heated to 360 DEG C by pressed compact, keeps 50 minutes, obtain first product under the condition of nitrogen or argon shield;
Step 6, is be heated to 1180 DEG C under the condition of 0.002MPa in vacuum by first product, is incubated 220 minutes, then after first Temperature fall to 450 DEG C, then is down to room temperature with the speed of 90 DEG C/min and obtains powdered metallurgical material.
Embodiment 3
A kind of powdered metallurgical material injection moulding method, carries out according to following steps:
46 parts of water-atomized iron powders, 25 parts of reduced iron powders, 8 parts of stainless steel powders, 5 parts of oxide powder and zincs and 5 parts of titanium tetrachloride powder, with parts by weight, are joined in grinder by step one, and grinding obtains the mixed-powder that particle diameter is 150 μm;
Step 2, with parts by weight, 6 parts of ethylene carbonates, 7 parts of 2-cyanacrylates, 5 parts of polyvinyl butyral resins, 3 parts of acrylamides and 3 parts of toluene di-isocyanate(TDI)s are joined in mixing and blending machine, be uniformly mixed, wherein mixing speed is 140 revs/min, whipping temp 70 DEG C, mixing time 40 minutes, obtains mixture one;
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and the speed that is wherein uniformly mixed is 90 revs/min, and mixing time is 26 minutes;
Step 4, puts into mould by mixture two, and be under the condition of 0.03MPa in vacuum, compressing at being heated to 175 DEG C, pressure is 850MPa, obtains pressed compact;
Step 5, is heated to 365 DEG C by pressed compact, keeps 50 minutes, obtain first product under the condition of nitrogen or argon shield;
Step 6, is be heated to 1180 DEG C under the condition of 0.002MPa in vacuum by first product, is incubated 230 minutes, then after first Temperature fall to 460 DEG C, then is down to room temperature with the speed of 90 DEG C/min and obtains powdered metallurgical material.
Embodiment 4
A kind of powdered metallurgical material injection moulding method, carries out according to following steps:
48 parts of water-atomized iron powders, 30 parts of reduced iron powders, 8 parts of stainless steel powders, 5 parts of oxide powder and zincs and 6 parts of titanium tetrachloride powder, with parts by weight, are joined in grinder by step one, and grinding obtains the mixed-powder that particle diameter is 160 μm;
Step 2, with parts by weight, 6 parts of ethylene carbonates, 9 parts of 2-cyanacrylates, 5 parts of polyvinyl butyral resins, 4 parts of acrylamides and 3 parts of toluene di-isocyanate(TDI)s are joined in mixing and blending machine, be uniformly mixed, wherein mixing speed is 140 revs/min, whipping temp 68 DEG C, mixing time 45 minutes, obtains mixture one;
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and the speed that is wherein uniformly mixed is 95 revs/min, and mixing time is 30 minutes;
Step 4, puts into mould by mixture two, and be under the condition of 0.04MPa in vacuum, compressing at being heated to 170 DEG C, pressure is 880MPa, obtains pressed compact;
Step 5, is heated to 370 DEG C by pressed compact, keeps 60 minutes, obtain first product under the condition of nitrogen or argon shield;
Step 6, is be heated to 1180 DEG C under the condition of 0.004MPa in vacuum by first product, is incubated 250 minutes, then after first Temperature fall to 480 DEG C, then is down to room temperature with the speed of 80 DEG C/min and obtains powdered metallurgical material.
Embodiment 5
A kind of powdered metallurgical material injection moulding method, carries out according to following steps:
50 parts of water-atomized iron powders, 30 parts of reduced iron powders, 10 parts of stainless steel powders, 6 parts of oxide powder and zincs and 6 parts of titanium tetrachloride powder, with parts by weight, are joined in grinder by step one, and grinding obtains the mixed-powder that particle diameter is 200 μm;
Step 2, with parts by weight, 8 parts of ethylene carbonates, 10 parts of 2-cyanacrylates, 6 parts of polyvinyl butyral resins, 4 parts of acrylamides and 4 parts of toluene di-isocyanate(TDI)s are joined in mixing and blending machine, be uniformly mixed, wherein mixing speed is 150 revs/min, whipping temp 70 DEG C, mixing time 50 minutes, obtains mixture one;
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and the speed that is wherein uniformly mixed is 100 revs/min, and mixing time is 30 minutes;
Step 4, puts into mould by mixture two, and be under the condition of 0.05MPa in vacuum, compressing at being heated to 180 DEG C, pressure is 900MPa, obtains pressed compact;
Step 5, is heated to 380 DEG C by pressed compact, keeps 60 minutes, obtain first product under the condition of nitrogen or argon shield;
Step 6, is be heated to 1200 DEG C under the condition of 0.004MPa in vacuum by first product, is incubated 250 minutes, then after first Temperature fall to 500 DEG C, then is down to room temperature with the speed of 100 DEG C/min and obtains powdered metallurgical material.
Carry out performance test to the powdered metallurgical material that above embodiment prepares, result is as follows:
| Project | Density/g/cm 3 | Hot strength/MPa | Percentage elongation/% | Case hardness |
| Embodiment 1 | 7.65 | 1320 | 4.2 | 700HV |
| Embodiment 2 | 7.73 | 1410 | 4.4 | 720HV |
| Embodiment 3 | 7.85 | 1485 | 4.5 | 745HV |
| Embodiment 4 | 7.81 | 1432 | 4.5 | 726HV |
| Embodiment 5 | 7.72 | 1386 | 4.3 | 718HV |
As can be seen from above result of the test, the powdered metallurgical material density that powdered metallurgical material injection moulding method provided by the invention obtains reaches 7.65g/cm
3above, hot strength reaches more than 1320MPa, and percentage elongation reaches 4.2-4.5%, and case hardness reaches more than 700HV, has good wearability and hardness, has certain ductility simultaneously, can be advantageously applied to every field.
Claims (6)
1. a powdered metallurgical material injection moulding method, is characterized in that, carries out according to following steps:
Step one, with parts by weight, joins in grinder by 40-50 part water-atomized iron powder, 20-30 part reduced iron powder, 5-10 part stainless steel powder, 2-6 part oxide powder and zinc and 3-6 part titanium tetrachloride powder, and grinding obtains the mixed-powder that particle diameter is 100-200 μm;
Step 2, with parts by weight, 3-8 part ethylene carbonate, 5-10 part 2-cyanacrylate, 2-6 part polyvinyl butyral resin, 1-4 part acrylamide and 1-4 part toluene di-isocyanate(TDI) are joined in mixing and blending machine, is uniformly mixed, obtains mixture one;
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two;
Step 4, puts into mould by mixture two, is under the condition of 0.01-0.05MPa in vacuum, compressing at being heated to 160-180 DEG C, obtains pressed compact;
Step 5, is heated to 350-380 DEG C by pressed compact under the condition of inert gas shielding, keeps 40-60 minute, obtains first product;
First product is be heated to 1150-1200 DEG C under the condition of 0.001-0.004MPa in vacuum by step 6, and insulation 200-250 minute, is then down to room temperature, obtains powdered metallurgical material.
2. powdered metallurgical material injection moulding method according to claim 1, is characterized in that, the condition be uniformly mixed in step 2 is mixing speed 130-150 rev/min, whipping temp 60-70 DEG C, mixing time 30-50 minute.
3. powdered metallurgical material injection moulding method according to claim 1, is characterized in that, the speed that is uniformly mixed in step 3 is 80-100 rev/min, and mixing time is 20-30 minute.
4. powdered metallurgical material injection moulding method according to claim 1, is characterized in that, pressure compressing in step 4 is 800-900MPa.
5. powdered metallurgical material injection moulding method according to claim 1, is characterized in that, in step 5, inert gas is nitrogen or argon gas.
6. powdered metallurgical material injection moulding method according to claim 1, is characterized in that, the first Temperature fall of step 6 temperature-fall period to after 400-500 DEG C, then is down to room temperature with the speed of 80-100 DEG C/min.
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| CN201410571083.XA CN104325141B (en) | 2014-10-23 | 2014-10-23 | A kind of powdered metallurgical material injection moulding method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111940740A (en) * | 2020-08-25 | 2020-11-17 | 兰州金浩机械制造有限公司 | Powder metallurgy material injection molding method |
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| CN101508020A (en) * | 2009-04-01 | 2009-08-19 | 苏州市职业大学 | Metal powder material for metal powder injection molding and molding technique |
| CN101670435A (en) * | 2009-10-16 | 2010-03-17 | 珠海美利信新材料技术有限公司 | Method for preparing high-toughness high-density tungsten alloy ring |
| CN101670438A (en) * | 2008-09-12 | 2010-03-17 | 深圳市注成科技有限公司 | Metal injection molding product and carbon control method thereof in manufacturing process |
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2014
- 2014-10-23 CN CN201410571083.XA patent/CN104325141B/en not_active Expired - Fee Related
Patent Citations (6)
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| JPH08209204A (en) * | 1994-10-07 | 1996-08-13 | Basf Ag | Method of preparing metallic molding,injection molding material and sintered metallic molding |
| CN101284308A (en) * | 2007-04-12 | 2008-10-15 | 吴旭升 | Low nickel austenitic stainless steel power and use thereof |
| CN101670438A (en) * | 2008-09-12 | 2010-03-17 | 深圳市注成科技有限公司 | Metal injection molding product and carbon control method thereof in manufacturing process |
| CN101353768A (en) * | 2008-09-26 | 2009-01-28 | 北京科技大学 | Nitrogen-containing nickel-free stainless steel and metallurgy forming process for powder thereof |
| CN101508020A (en) * | 2009-04-01 | 2009-08-19 | 苏州市职业大学 | Metal powder material for metal powder injection molding and molding technique |
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| CN111940740A (en) * | 2020-08-25 | 2020-11-17 | 兰州金浩机械制造有限公司 | Powder metallurgy material injection molding method |
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