CN104325141B - A kind of powdered metallurgical material injection moulding method - Google Patents
A kind of powdered metallurgical material injection moulding method Download PDFInfo
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- CN104325141B CN104325141B CN201410571083.XA CN201410571083A CN104325141B CN 104325141 B CN104325141 B CN 104325141B CN 201410571083 A CN201410571083 A CN 201410571083A CN 104325141 B CN104325141 B CN 104325141B
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- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000001746 injection moulding Methods 0.000 title claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 47
- 239000000843 powder Substances 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 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
- 238000003756 stirring Methods 0.000 claims abstract description 11
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 8
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012948 isocyanate Substances 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
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000011701 zinc Substances 0.000 claims abstract description 3
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 239000002245 particle 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
- 238000001816 cooling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000011261 inert gas Substances 0.000 abstract description 2
- 238000000227 grinding Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 238000004663 powder metallurgy Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 235000016804 zinc Nutrition 0.000 description 6
- 238000000465 moulding Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 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
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 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
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- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of powdered metallurgical material injection moulding method, first make water fogging ferrum powder, reduced iron powder, stainless steel powder, oxide powder and zinc and titanium tetrachloride powder join in grinder, grinding obtains mixed-powder, then by ethylene carbonate, 2 cyanacrylates, polyvinyl butyral resin, acrylamide and toluene di-isocyanate(TDI) join in mixing and blending machine, stir to obtain mixture one, mixed-powder is being joined in mixture one, put into after being uniformly mixed in mould, under vacuum, heat compressing, obtain pressed compact, first product is obtained after again pressed compact being heated certain time under conditions of inert gas shielding, it is down to room temperature after finally first product being heated under vacuum and is incubated, obtain powdered metallurgical material.The present invention solves the problem that batch mixing in production process is uneven so that final products density improves, and hot strength strengthens, and improves case hardness simultaneously.
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 by powder metallurgy and plastic injection
The novel manufacturing process technology that moulding process combines, this technique is suitable for producing miniature precision 3D shape complexity and tool in enormous quantities
Have specific characteristics the manufacture of the metallic element that can require, sintered products not only has as the goods obtained by injection-moulding plastic
Complicated shape and high accuracy, and there is the physics that forge piece is close, chemical property and mechanical performance.It can manufacture the biggest
Most refractory metals and compound, porous material, it is fewer than casting technique product has blank, it is not necessary to or seldom need with
After machining, therefore metal material can be greatly saved, reduce product cost.
The feature of powder metallurgy injection molding technique is, powder metallurgy injection moulding is mainly conventional powder metallurgy with existing
A kind of parts novel forming technology combined for plastic injection moulding process and formed, it can directly produce has finally
The parts of shape, reduce amount of machining to greatest extent and save raw material, solve puzzlement powder metallurgy neck the most always
The complicated shape goods in territory shape difficult problem；And the adaptability for materials of this technology is wide, every can make powder metal,
Alloy, pottery etc. all can use this technology to make parts.Additionally, this technology can also realize full-automatic production continuously, produce
Efficiency is high, excellent material performance, and product size precision is high, therefore suffers from extensively paying attention to.Currently used employing powder metallurgy is injected
Iron density prepared by moulding process can reach 6.5-7g/cm3Left and right, tensile property is the highest, and case hardness also is difficult to full
Foot needs, it is therefore desirable to the more preferable powdered metallurgical material of combination property meets market demand.
Summary of the invention
It is an object of the invention to provide a kind of powdered metallurgical material injection moulding side to overcome above the deficiencies in the prior art
Method, solves the problem that batch mixing in production process is uneven so that final products density improves, and hot strength strengthens, and carries simultaneously
High case hardness.
The present invention is realized by techniques below means:
A kind of powdered metallurgical material injection moulding method, follows the steps below:
Step one, in parts by weight, 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 join in grinder, grind and obtain the mixed-powder that particle diameter is 100-200 μm；
Step 2, in parts by weight, by 3-8 part ethylene carbonate, 5-10 part 2-cyanacrylate, 2-6 part polyvinyl alcohol contracting fourth
Aldehyde, 1-4 part acrylamide and 1-4 part toluene di-isocyanate(TDI) join in mixing and blending machine, are uniformly mixed, are mixed
Thing one；
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two；
Step 4, puts in mould by mixture two, under conditions of vacuum is 0.01-0.05MPa, at being heated to 160-180 DEG C
Compressing, obtain pressed compact；
Step 5, is heated to 350-380 DEG C by pressed compact under conditions of inert gas shielding, keeps 40-60 minute, obtains first product；
Step 6, is heated to 1150-1200 DEG C by first product under conditions of vacuum is 0.001-0.004MPa, is incubated 200-250 minute,
Then it is down to room temperature, obtains powdered metallurgical material.
Described powdered metallurgical material injection moulding method, the condition stirring mixing 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, stirring mixing velocity in step 3 can be 80-100 rev/min, stirring
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, noble gas can be nitrogen or argon.
Described powdered metallurgical material injection moulding method, step 6 temperature-fall period can be first be naturally cooling to 400-500 DEG C after,
It is down to room temperature again with the speed of 80-100 DEG C/min.
The powdered metallurgical material density that the powdered metallurgical material injection moulding method that the present invention provides obtains has reached 7.65g/cm3With
On, hot strength has reached more than 1320MPa, and percentage elongation has reached 4.2-4.5%, and case hardness has reached more than 700HV,
There is good wearability and hardness, there is certain ductility simultaneously, every field can be advantageously applied to.
Detailed description of the invention
Embodiment 1
A kind of powdered metallurgical material injection moulding method, follows the steps below:
Step one, in parts by weight, by 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 join in grinder, grind and obtain the mixed-powder that particle diameter is 100 μm；
Step 2, in parts by weight, by 3 parts of ethylene carbonates, 5 parts of 2-cyanacrylates, 2 parts of polyvinyl butyral resins, 1
Part acrylamide and 1 part of toluene di-isocyanate(TDI) join in mixing and blending machine, are uniformly mixed, and wherein mixing speed is 130
Rev/min, whipping temp 60 DEG C, mixing time 30 minutes, obtain mixture one；
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and wherein stirring mixing velocity is
80 revs/min, mixing time is 20 minutes；
Step 4, puts in mould by mixture two, under conditions of vacuum is 0.01MPa, is heated at 160 DEG C compressing,
Pressure is 800MPa, obtains pressed compact；
Step 5, is heated to 350 DEG C by pressed compact under conditions of nitrogen or argon shield, keeps 40 minutes, obtains first product；
Step 6, is heated to 1150 DEG C by first product under conditions of vacuum is 0.001MPa, 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, follows the steps below:
Step one, in parts by weight, by 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 join in grinder, grind and obtain the mixed-powder that particle diameter is 120 μm；
Step 2, in parts by weight, by 4 parts of ethylene carbonates, 7 parts of 2-cyanacrylates, 3 parts of polyvinyl butyral resins, 2
Part acrylamide and 2 parts of toluene di-isocyanate(TDI)s join in mixing and blending machine, are uniformly mixed, and wherein mixing speed is 135
Rev/min, whipping temp 66 DEG C, mixing time 38 minutes, obtain mixture one；
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and wherein stirring mixing velocity is
90 revs/min, mixing time is 25 minutes；
Step 4, puts in mould by mixture two, under conditions of vacuum is 0.02MPa, is heated at 165 DEG C compressing,
Pressure is 830MPa, obtains pressed compact；
Step 5, is heated to 360 DEG C by pressed compact under conditions of nitrogen or argon shield, keeps 50 minutes, obtains first product；
Step 6, is heated to 1180 DEG C by first product under conditions of vacuum is 0.002MPa, is incubated 220 minutes, then the most natural
After being cooled to 450 DEG C, then it 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, follows the steps below:
Step one, in parts by weight, by 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 join in grinder, grind and obtain the mixed-powder that particle diameter is 150 μm；
Step 2, in parts by weight, by 6 parts of ethylene carbonates, 7 parts of 2-cyanacrylates, 5 parts of polyvinyl butyral resins, 3
Part acrylamide and 3 parts of toluene di-isocyanate(TDI)s join in mixing and blending machine, are uniformly mixed, and wherein mixing speed is 140
Rev/min, whipping temp 70 DEG C, mixing time 40 minutes, obtain mixture one；
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and wherein stirring mixing velocity is
90 revs/min, mixing time is 26 minutes；
Step 4, puts in mould by mixture two, under conditions of vacuum is 0.03MPa, is heated at 175 DEG C compressing,
Pressure is 850MPa, obtains pressed compact；
Step 5, is heated to 365 DEG C by pressed compact under conditions of nitrogen or argon shield, keeps 50 minutes, obtains first product；
Step 6, is heated to 1180 DEG C by first product under conditions of vacuum is 0.002MPa, is incubated 230 minutes, then the most natural
After being cooled to 460 DEG C, then it 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, follows the steps below:
Step one, in parts by weight, by 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 join in grinder, grind and obtain the mixed-powder that particle diameter is 160 μm；
Step 2, in parts by weight, by 6 parts of ethylene carbonates, 9 parts of 2-cyanacrylates, 5 parts of polyvinyl butyral resins, 4
Part acrylamide and 3 parts of toluene di-isocyanate(TDI)s join in mixing and blending machine, are uniformly mixed, and wherein mixing speed is 140
Rev/min, whipping temp 68 DEG C, mixing time 45 minutes, obtain mixture one；
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and wherein stirring mixing velocity is
95 revs/min, mixing time is 30 minutes；
Step 4, puts in mould by mixture two, under conditions of vacuum is 0.04MPa, is heated at 170 DEG C compressing,
Pressure is 880MPa, obtains pressed compact；
Step 5, is heated to 370 DEG C by pressed compact under conditions of nitrogen or argon shield, keeps 60 minutes, obtains first product；
Step 6, is heated to 1180 DEG C by first product under conditions of vacuum is 0.004MPa, is incubated 250 minutes, then the most natural
After being cooled to 480 DEG C, then it 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, follows the steps below:
Step one, in parts by weight, by 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
Join in grinder with 6 parts of titanium tetrachloride powder, grind and obtain the mixed-powder that particle diameter is 200 μm；
Step 2, in parts by weight, by 8 parts of ethylene carbonates, 10 parts of 2-cyanacrylates, 6 parts of polyvinyl butyral resins, 4
Part acrylamide and 4 parts of toluene di-isocyanate(TDI)s join in mixing and blending machine, are uniformly mixed, and wherein mixing speed is 150
Rev/min, whipping temp 70 DEG C, mixing time 50 minutes, obtain mixture one；
Step 3, joins mixed-powder in mixture one, is uniformly mixed and obtains mixture two, and wherein stirring mixing velocity is
100 revs/min, mixing time is 30 minutes；
Step 4, puts in mould by mixture two, under conditions of vacuum is 0.05MPa, is heated at 180 DEG C compressing,
Pressure is 900MPa, obtains pressed compact；
Step 5, is heated to 380 DEG C by pressed compact under conditions of nitrogen or argon shield, keeps 60 minutes, obtains first product；
Step 6, is heated to 1200 DEG C by first product under conditions of vacuum is 0.004MPa, is incubated 250 minutes, then the most natural
After being cooled to 500 DEG C, then it is down to room temperature with the speed of 100 DEG C/min and obtains powdered metallurgical material.
The powdered metallurgical material preparing above example carries out performance test, and result is as follows:
| Project | Density/g/cm3 | 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 |
From above result of the test it can be seen that the powder metallurgy material that obtains of powdered metallurgical material injection moulding method that provides of the present invention
Material density has reached 7.65g/cm3Above, hot strength has reached more than 1320MPa, and percentage elongation has reached 4.2-4.5%, table
Surface hardness has reached more than 700HV, has good wearability and hardness, has certain ductility simultaneously, can be well
It is applied to every field.
Claims (5)
1. a powdered metallurgical material injection moulding method, it is characterised in that follow the steps below:
Step one, in 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, grinds and obtains the mixed-powder that particle diameter is 100-200 μm；
Step 2, in 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 in mould by mixture two, under conditions of vacuum is 0.01-0.05MPa, 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 conditions of argon shield, keeps 40-60 minute, obtains first product；
Step 6, is heated to 1150-1200 DEG C by first product under conditions of vacuum is 0.001-0.004MPa, is incubated 200-250 minute, is then down to room temperature, obtains powdered metallurgical material.
Powdered metallurgical material injection moulding method the most according to claim 1, it is characterised in that the condition stirring mixing in step 2 is mixing speed 130-150 rev/min, whipping temp 60-70 DEG C, mixing time 30-50 minute.
Powdered metallurgical material injection moulding method the most according to claim 1, it is characterised in that stirring mixing velocity in step 3 and be 80-100 rev/min, mixing time is 20-30 minute.
Powdered metallurgical material injection moulding method the most according to claim 1, it is characterised in that pressure compressing in step 4 is 800-900MPa.
5.
Powdered metallurgical material injection moulding method according to claim 1, it is characterised in that after step 6 temperature-fall period is first naturally cooling to 400-500 DEG C, then it is down to room temperature with the speed of 80-100 DEG C/min.
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| 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 |
| CN101353768B (en) * | 2008-09-26 | 2010-09-01 | 北京科技大学 | Nitrogen-containing nickel-free stainless steel and metallurgy forming process for powder thereof |
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