CN109047752A - A kind of metal powder injection molding feeding and preparation method thereof - Google Patents
A kind of metal powder injection molding feeding and preparation method thereof Download PDFInfo
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- CN109047752A CN109047752A CN201810828210.8A CN201810828210A CN109047752A CN 109047752 A CN109047752 A CN 109047752A CN 201810828210 A CN201810828210 A CN 201810828210A CN 109047752 A CN109047752 A CN 109047752A
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- powder
- feeding
- stainless steel
- injection molding
- metal powder
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Classifications
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- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- 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
Abstract
The invention discloses a kind of metal powder injection molding feeding and preparation method thereof, which includes binder and 316L stainless steel feeding powder, and the mass ratio of the binder and the 316L stainless steel feeding powder is 96:4~90:10；The 316L stainless steel feeding powder includes the component of following mass percent: 316L powder of stainless steel 90%~99%, chromium carbide powder 1%~10%, the binder includes the component of following mass percent: paraffin 5%~10%, ethylene acrylic acid co polymer 5%~10%, polyethylene 5%~10%, polyethylene glycol 5%~10%, polyformaldehyde 75%~80%.The metal powder injection molding feeding is used in MIM technique, as MIM feeding, structural member product needed for meeting various 3C electronic equipments, and the properties of product with high rigidity high-quality can be gone out with processing and fabricating.
Description
Technical field
The present invention relates to a kind of metal powder injection molding feedings and preparation method thereof.
Background technique
With being constantly progressive for social science and technology and flourishing for global industry, powder metallurgy due to its many advantages,
Industry rapidly develops, and technology has been widely used in the fields such as military affairs, traffic, machinery, electronics, space flight, aviation.
MIM (metal powder injection molded) feeding is the core process of metal injection molding product preparation, is by metal powder
Last and additive at a certain temperature, carries out the mixing of a period of time temperature according to a certain percentage in being kneaded granulation all-in-one machine,
It cuts and pelletizes using Screw Extrusion, injection moulding feeding is made.
Wherein 316L stainless steel (such as SUS316L stainless steel) feeding, because manufactured fabricated part corrosion resistance and polishing are imitated
Fruit is good, favors by each IT electronics industry client, is widely used in each electronic product part.But due to 316L stainless steel material
Hardness is lower, limits application of the big component 316L stainless steel parts on electronic product, with the continuous development of social science and technology,
The hardness of common 316L stainless steel can no longer meet all customer demands, and SUS316L stainless steel is due to than it on structural member
His stainless steel material is all softer to be easily deformed, can not high volume applications.Under the overall situation of this Market competition, it is badly in need of out
Issue a kind of metal powder injection molded stainless steel feeding of high rigidity high-quality.
Summary of the invention
It is a primary object of the present invention to overcome the deficiencies of the prior art and provide a kind of metal powder injection molding feeding and
Preparation method.
To achieve the above object, the invention adopts the following technical scheme:
A kind of metal powder injection molding feeding, including binder and 316L stainless steel feeding powder, the binder and
The mass ratio of the 316L stainless steel feeding powder is 96: 4~90: 10；
The 316L stainless steel feeding powder includes the component of following mass percent:
316L powder of stainless steel: 90%~99%
Chromium carbide powder: 1%~10%
The binder includes the component of following mass percent:
Further:
The 316L powder of stainless steel is SUS316L powder of stainless steel.
The 316L powder of stainless steel and the chromium carbide powder meet following specification:
- 500 mesh of 316L powder of stainless steel
- 800 mesh of chromium carbide powder.
A kind of preparation method of the metal powder injection molding feeding, comprising the following steps:
S1. the stainless steel feeding powder is added in kneading machine and is preheated；
S2. the binder being added according to the proportion, is kneaded；
S3. extruding pelletization.
Further:
In step S1, the stainless steel feeding powder is preheating to predetermined temperature to exclude the aqueous vapor in powder, preferably plus
Heat is to 200 DEG C.
In step S2, greater than 170 DEG C at a temperature of the binder be added and be kneaded.
It in step S2, is kept for 185 DEG C of temperature, revolving speed 20r/min, stops heating after being kneaded 30min, be further continued for being kneaded
30min。
A method of product is made using the metal powder injection molding feeding, comprising the following steps:
S1. the stainless steel feeding powder is added in kneading machine and is preheated；
S2. the binder being added according to the proportion, is kneaded；
S3. extruding pelletization；
S4. be injection moulded using the feeding of granulation, degreasing, sintering MIM process obtain the product.
Further:
In step S4, to injection molding member degreasing, vacuum-sintering, sintering temperature are carried out after making total mass loss rate >=7.5%
1360 DEG C, soaking time 3 hours of degree.
A kind of product is the product being made by the metal powder injection molding feeding by MIM technique.
Preferably, the product is 3C Electronic Equipment Structural Member.
Beneficial effects of the present invention:
Metal powder injection molding feeding provided by the invention is formulated using specific, wherein binder and 316L stainless steel
The mass ratio of feeding powder is 96:4~90:10, which includes mass percent 90%~99%
316L powder of stainless steel and 1%~10% chromium carbide powder, which includes the full refining of mass percent 5%~10%
Paraffin, 5%~10% ethylene acrylic acid co polymer, 5%~10% polyethylene, 5%~10% polyethylene glycol, 75%~
The metal powder injection molding feeding is used in MIM technique by 80% polyformaldehyde, as MIM feeding, can be gone out with processing and fabricating full
Structural member product needed for the various 3C electronic equipments of foot, and the properties of product with high rigidity high-quality.Experiments verify that using
The SUS316L feeding of inventive formulation, the hardness of MIM product than common SUS316L feeding the enhancing of MIM product up to 40% with
On, it solves the problems, such as that the big part thin pieces of SUS316L material parts is easily deformed, expands the part of SUS316L material
Market application range.Since product hardness is promoted, it is unlikely to deform, meets the intensity requirement of the big part product of 316L, especially promoted
Application range of the SUS316L product on consumer electronics product.
Detailed description of the invention
Fig. 1 show the instance graph of the MIM molded blank using metal powder injection molding feeding of the present invention；
Fig. 2 show the instance graph of product after the MIM sintering using metal powder injection molding feeding of the present invention.
Specific embodiment
It elaborates below to embodiments of the present invention.It is emphasized that following the description is only exemplary,
The range and its application being not intended to be limiting of the invention.
In one embodiment, a kind of metal powder injection molding feeding, including binder and 316L stainless steel feeding powder
The mass ratio of end, the binder and the 316L stainless steel feeding powder is 96:4~90:10；
The 316L stainless steel feeding powder includes the component of following mass percent:
316L powder of stainless steel: 90%~99%
Chromium carbide powder: 1%~10%
The binder includes the component of following mass percent:
In a preferred embodiment, the 316L powder of stainless steel is SUS316L powder of stainless steel.
In a preferred embodiment, the 316L powder of stainless steel and the chromium carbide powder meet following specification:
- 500 mesh of 316L powder of stainless steel
- 800 mesh of chromium carbide powder.
In one embodiment, a kind of preparation method of the metal powder injection molding feeding, comprising the following steps:
S1. the stainless steel feeding powder is added in kneading machine and is preheated；
S2. the binder being added according to the proportion, is kneaded；
S3. extruding pelletization.
In a preferred embodiment, in step S1, the stainless steel feeding powder is preheating to predetermined temperature to exclude powder
In aqueous vapor, it is further preferred that being heated to 200 DEG C of predetermined temperatures.
In a preferred embodiment, in step S2, greater than 170 DEG C at a temperature of the binder be added and be kneaded.
In a preferred embodiment, it in step S2, is kept for 185 DEG C of temperature, revolving speed 20r/min, stops adding after being kneaded 30min
Heat is further continued for being kneaded 30min.
In one embodiment, a method of product being made using the metal powder injection molding feeding, including
Following steps:
S1. the stainless steel feeding powder is added in kneading machine and is preheated；
S2. the binder being added according to the proportion, is kneaded；
S3. extruding pelletization；
S4. be injection moulded using the feeding of granulation, degreasing, sintering MIM process obtain the product.
In a preferred embodiment, it in step S4, to injection molding member degreasing, is carried out after making total mass loss rate >=7.5%
Vacuum-sintering, 1360 DEG C of sintering temperature, soaking time 3 hours.
A kind of specific preferred sintering control program is as shown in table 1.
Table 1
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | |
| T, min | 0 | 180 | 240 | 300 | 330 | 390 | 420 | 520 | 570 | 630 | 810 | 870 | 960 |
| Ts, DEG C | 0 | 600 | 600 | 800 | 800 | 1050 | 1050 | 1300 | 1300 | 1360 | 1360 | 900 | 0 |
| N2, L/min | 0 | 900 | 900 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1500 |
| Ar, Pa | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 500 | 500 | 500 | 500 | 500 | 0 |
Wherein 1~13 it is expressed as program segment, starts to warm up (1 section) from starting device, come out of the stove to the cooling that program has been run
(13 sections)；T, min indicate that running altogether how many minutes terminates this section of journey from starting device to the cumulative time for having run the program
Sequence；Ts, DEG C indicates to work as leading portion program setting temperature, the temperature rise period, and the numerical value in even number section needs to rise after program segment thus
The temperature that temperature arrives, program segment needs the temperature kept to the numerical value in odd number section thus, and temperature-fall period, program segment terminates numerical value thus
When need the temperature that drops to；N2, L/min indicate pure nitrogen gas (99% or more purity) is passed through how many liter per minute；Ar, pa indicate logical
It crosses and is passed through argon gas to control the sintering pressure pa in vacuum sintering furnace.
In one embodiment, a kind of product is to be made by the metal powder injection molding feeding by MIM technique
Made of product.
In a preferred embodiment, the product can be 3C Electronic Equipment Structural Member.
In certain embodiments, a kind of metal powder injection molding feeding preparation method, comprising the following steps:
S1, starting kneader, Stirring host (5r/1min), is added SUS316L powder of stainless steel and chromium carbide at a slow speed
Proportion material, is preheating to 200 DEG C of exclusion powder aqueous vapors；
S2, after 1 hour, with laser infrared line temperature measurer, powder temperature is detected, when detection temperature is greater than 170 DEG C, by powder
Prepared forming agent is added in the percentage of weight, reduces temperature to 185 DEG C, adjustment revolving speed to 20r/1min continues kneading mixing
Feeding；
S3, after being kneaded revolving speed temperature holding 30min, melting temperature is closed, is continued after being kneaded 30min, extrusion granulator obtains
SUS316L after hardening is injection moulded feeding.
Exemplary embodiments
The SUS316L powder of stainless steel for preparing the embodiment of the present invention is injection moulded feeding, and is produced with feeding preparation MIM
Product.
1. taking SUS316L powder 4300g, chromium carbide powder 200g, it is put into kneading machine heating and is preheated to 200 DEG C, starting
It adjusts rotary machine at a slow speed and mediates stirring system (5r/1min), after 30min, detect powder temperature, fully refined paraffin wax 25g is added,
Ethylene acrylic acid co polymer 50g, polyethylene 40g, polyethylene glycol 45g, polyformaldehyde 375g reduce set temperature to 185 DEG C, are turned up
Revolving speed continues to mediate and stirs mixing 30min, turn off device temperature to (20r/1min), then keeps mixing 30min, extrusion granulator,
SUS316L after hardening is made is injection moulded feeding；
2. the feeding high pressure after hardening is injected standard strip sample molds (product size: 100* by with injector
Standard strip sample blank 10*3) is obtained, as shown in Figure 1；
3. sample blank progress catalysis degreasing is carried out product after measuring degreasing sample total mass loss rate >=7.5%
Vacuum-sintering, soaking time 3 hours, obtains sintered product, as shown in Figure 2 by 1360 DEG C of sintering temperature；
4. taking the sample products sintered, detected firmly, measures vickers hardness hv 250-280；
Typical comparison's example:
Traditional SUS316L injection moulding feeding is prepared, and prepares MIM product with the feeding.
1. take the common SUS316L feeding of 5KG, by the way that with injector, feeding high pressure is injected standard strip sample molds
(product size: 100*10*3) obtains sample, and molded blank sample rate is 5.45g/cm3；
2. blank sample progress catalysis degreasing is carried out product after measuring degreasing sample total mass loss rate >=7.5%
Vacuum-sintering, 1360 DEG C of sintering temperature, soaking time 2.5 hours；
Rear product sample is sintered 3. taking, is detected firmly, sample vickers hardness hv 120-180 is measured.
The parameter comparison such as the following table 2 and table 3 for the product sample that multiple embodiments and comparative example sinter.
The 316L standard batten parameter of 2 conventional formulation of table
The 316L standard batten parameter of 3 embodiment of the present invention of table
After testing, by with the prepared SUS316L feeding product of method of the invention, hardness (Vickers HV) ratio
The product of conventional method preparation can be improved 40% or more.
The above content is combine it is specific/further detailed description of the invention for preferred embodiment, cannot recognize
Fixed specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, some replacements or modifications can also be made to the embodiment that these have been described,
And these substitutions or variant all shall be regarded as belonging to protection scope of the present invention.
Claims (10)
1. a kind of metal powder injection molding feeding, which is characterized in that described including binder and 316L stainless steel feeding powder
The mass ratio of binder and the 316L stainless steel feeding powder is 96:4~90:10；
The 316L stainless steel feeding powder includes the component of following mass percent:
316L powder of stainless steel: 90%~99%
Chromium carbide powder: 1%~10%
The binder includes the component of following mass percent:
2. metal powder injection molding feeding as described in claim 1, which is characterized in that the 316L powder of stainless steel is
SUS316L powder of stainless steel.
3. metal powder injection molding feeding as claimed in claim 1 or 2, which is characterized in that the 316L powder of stainless steel
Meet following specification with the chromium carbide powder:
- 500 mesh of 316L powder of stainless steel
- 800 mesh of chromium carbide powder.
4. a kind of preparation method of metal powder injection molding feeding as described in any one of claims 1 to 3, feature exist
In, comprising the following steps:
S1. the stainless steel feeding powder is added in kneading machine and is preheated；
S2. the binder being added according to the proportion, is kneaded；
S3. extruding pelletization.
5. the preparation method of metal powder injection molding feeding as claimed in claim 4, which is characterized in that, will in step S1
The stainless steel feeding powder is preheating to predetermined temperature to exclude the aqueous vapor in powder, is preferably heated to 200 DEG C.
6. the preparation method of metal powder injection molding feeding as claimed in claim 4, which is characterized in that in step S2,
The binder is added at a temperature of greater than 170 DEG C and is kneaded.
7. the preparation method of metal powder injection molding feeding as claimed in claim 6, which is characterized in that in step S2, protect
185 DEG C of temperature, revolving speed 20r/min are held, stops heating after being kneaded 30min, is further continued for being kneaded 30min.
8. a kind of method using metal powder injection molding feeding as described in any one of claims 1 to 3 production product,
It is characterized in that, comprising the following steps:
S1. the stainless steel feeding powder is added in kneading machine and is preheated；
S2. the binder being added according to the proportion, is kneaded；
S3. extruding pelletization；
S4. be injection moulded using the feeding of granulation, degreasing, sintering MIM process obtain the product.
9. method according to claim 8, which is characterized in that in step S4, to injection molding member degreasing, make total mass loss
Carry out vacuum-sintering after rate >=7.5%, 1360 DEG C of sintering temperature, soaking time 3 hours.
10. a kind of product, which is characterized in that be by metal powder injection molding feeding as described in any one of claims 1 to 3
The product being made by MIM technique, it is preferable that the product is 3C Electronic Equipment Structural Member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810828210.8A CN109047752A (en) | 2018-07-25 | 2018-07-25 | A kind of metal powder injection molding feeding and preparation method thereof |
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| CN201810828210.8A CN109047752A (en) | 2018-07-25 | 2018-07-25 | A kind of metal powder injection molding feeding and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110315070A (en) * | 2019-06-28 | 2019-10-11 | 东莞华晶粉末冶金有限公司 | A kind of high-hardness stainless steel material fabrication process |
| WO2020192240A1 (en) * | 2019-03-26 | 2020-10-01 | 海安县鹰球粉末冶金有限公司 | Precipitation-hardening stainless steel material injection molding feedstock and preparation method therefor |
| CN117340252A (en) * | 2023-10-09 | 2024-01-05 | 广东潮艺金属实业有限公司 | High-heat-conductivity injection molding feed containing titanium-stainless steel composite powder and preparation method and application thereof |
-
2018
- 2018-07-25 CN CN201810828210.8A patent/CN109047752A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192240A1 (en) * | 2019-03-26 | 2020-10-01 | 海安县鹰球粉末冶金有限公司 | Precipitation-hardening stainless steel material injection molding feedstock and preparation method therefor |
| CN110315070A (en) * | 2019-06-28 | 2019-10-11 | 东莞华晶粉末冶金有限公司 | A kind of high-hardness stainless steel material fabrication process |
| CN110315070B (en) * | 2019-06-28 | 2022-02-11 | 东莞华晶粉末冶金有限公司 | Manufacturing method of high-hardness stainless steel material |
| CN117340252A (en) * | 2023-10-09 | 2024-01-05 | 广东潮艺金属实业有限公司 | High-heat-conductivity injection molding feed containing titanium-stainless steel composite powder and preparation method and application thereof |
| CN117340252B (en) * | 2023-10-09 | 2024-03-29 | 广东潮艺金属实业有限公司 | High-heat-conductivity injection molding feed containing titanium-stainless steel composite powder and preparation method and application thereof |
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Effective date of registration: 20190814 Address after: 523843 No. 2 Weifeng Road, Niushan External Economic Industrial Park, Dongcheng Street, Dongguan City, Guangdong Province Applicant after: Dongguan Hua Jing powder metallurgy company limited Address before: 523843 Chang'an Town Corner Village, Dongguan City, Guangdong Province Applicant before: Guangdong wins smart group Limited by Share Ltd Applicant before: Dongguan Hua Jing powder metallurgy company limited |
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