CN107377975A - Alloy powder injection moulding feeding and preparation method thereof - Google Patents
Alloy powder injection moulding feeding and preparation method thereof Download PDFInfo
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- CN107377975A CN107377975A CN201710482504.5A CN201710482504A CN107377975A CN 107377975 A CN107377975 A CN 107377975A CN 201710482504 A CN201710482504 A CN 201710482504A CN 107377975 A CN107377975 A CN 107377975A
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- alloy powder
- feeding
- forming agent
- injection moulding
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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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a kind of alloy powder injection moulding feeding and preparation method thereof, alloy powder injection moulding feeding, including forming agent and alloy powder, the mass ratio of the forming agent and the alloy powder is 0.85 1.05：9.15‑8.95；The alloy powder includes the component of following mass percent：Cr15.5% 17.5%, Ni3% 5%, Cu3% 5%, Si≤1%, Mn≤1%, Nb0.15% 0.45%, Fe surpluses；The forming agent includes the component of following mass percent：1.5~3%POE；1.5~3%CPE；3~6% optothermal stabilizers；7~10% high density polyethylene (HDPE)s；7~10%EVA；2~4% paraffin；70~78% polyformaldehyde.Alloy powder provided by the invention is injection moulded feeding under the premise of MIM techniques and properties of product are met, can produce with high tenacity MIM base substrates.
Description
Technical field
The present invention relates to a kind of alloy powder injection moulding feeding and preparation method thereof.
Background technology
Metal powder injection molding (abbreviation MIM) is that conventional powder metallurgy and injection molding of plastics technology are combined
A kind of near-net-shape technology, it is adapted to small-sized, complex shape part batch production, solves titanium or titanium alloy part better
The problem of production cost is high.With the improvement of MIM technologies, the apparent density of titanium valve mixture is improved, and use it is new into
Type agent, also causes shrinkage factor to reduce, and is addressed the problems such as size and accuracy, consistency.
MIM technologies are widely used in auto parts and components and 3C electronics fields at this stage.17-4PH stainless steels are because of it
Cost is cheap, material property is good, is widely used in 3C electronic product structural components.Product is after molding blank, such as mobile phone
The products such as Kato, USB interface, because its is complicated and size is smaller, the redundant structures such as batch peak, burr occur above base substrate.
Need to increase a repaired biscuit technique, operating personnel is manually purged product redundant structure.
Current 17-4PH stainless steels feeding, in repaired biscuit technique, operating personnel can be caused because base substrate is more crisp, toughness is low
It is easy to break product in repaired biscuit, it is bad up to 10%, and had a strong impact on operating efficiency.
Under the premise of MIM techniques and properties of product are met, developing a kind of MIM feedings of high tenacity base substrate turns into skill instantly
Art problem.
The content of the invention
It is a primary object of the present invention to overcome the deficiencies in the prior art, there is provided a kind of alloy powder injection moulding feeding and
Its preparation method.
To achieve the above object, the present invention uses following technical scheme：
A kind of alloy powder is injection moulded feeding, including forming agent and alloy powder, the forming agent and the alloyed powder
The mass ratio at end is 0.85-1.05：9.15-8.95；
The alloy powder includes the component of following mass percent：Cr15.5%-17.5%, Ni3%-5%, Cu3%-
5%, Si≤1%, Mn≤1%, Nb0.15%-0.45%, Fe surplus；
The forming agent includes the component of following mass percent：1.5~3%POE；1.5~3%CPE；3~6% photo-thermal
Stabilizer；7~10% high density polyethylene (HDPE)s；7~10%EVA；2~4% paraffin；70~78% polyformaldehyde.
Further：
The granularity of the alloy powder meets -500 mesh, preferably tap density 4-6g/cm3,4.90g/cm3.
A kind of preparation method of described alloy powder injection moulding feeding, comprises the following steps：
S1. the alloy powder is added in kneading machine and is stirred heating；
S2. the forming agent is added according to proportioning, is kneaded；
S3. extruding pelletization.
Further：
In step S1, the metal dust is heated to 160 ± 5 DEG C of scope.
In step S2,25-35 revs/min of kneading machine rotating speed is set, stirs 10-30min.
The method that a kind of alloy powder injection moulding feeding described in use makes product, comprises the following steps：
S1. the metal dust is added in kneading machine and is stirred heating；
S2. the forming agent added according to proportioning, is kneaded；
S3. extruding pelletization；
S4. it is injection moulded using the feeding of granulation, dumping, sintering process handles to obtain the product.
Further：
The product is 3C electronic product structural components.
Beneficial effects of the present invention：
Alloy powder provided by the invention is injection moulded feeding, under the premise of MIM techniques and properties of product are met, can make
Make with high tenacity MIM base substrates, be reduced to 3% by repaired biscuit process procedure is bad, improve the performance of MIM products.
Invention significantly improves MIM base substrate toughness, detect the product of the embodiment of the present invention toughness test pressure value>
16N, by repaired biscuit process procedure it is bad caused by the low reason of base substrate toughness be reduced to 3% (and traditional feeding repaired biscuit it is bad
More than 10%).
The embodiment of the present invention while the performance for ensureing feeding and products thereof, specific performance are as follows：
1) feeding melt index：300-1200g/cm3；
2) constriction coefficient of feeding is in scope 1.158 ± 0.0025, representative value 1.160；
3) density after sintering：＞ 7.60g/cm3；
4) hardness：220HV-270HV；
5) consistency：>94%.
Embodiment
Embodiments of the present invention are elaborated below.It is emphasized that what the description below was merely exemplary,
The scope being not intended to be limiting of the invention and its application.
In one embodiment, a kind of alloy powder injection moulding feeding, including forming agent and alloy powder, the shaping
The mass ratio of agent and the alloy powder is 0.85-1.05：9.15-8.95；
The alloy powder includes the component of following mass percent：Cr15.5%-17.5%, Ni3%-5%, Cu3%-
5%, Si≤1%, Mn≤1%, Nb0.15%-0.45%, Fe surplus；
The forming agent includes the component of following mass percent：1.5~3%POE；1.5~3%CPE；3~6% photo-thermal
Stabilizer；7~10% high density polyethylene (HDPE)s；7~10%EVA；2~4% paraffin；70~78% polyformaldehyde.
In a preferred embodiment, the granularity of the alloy powder meets -500 mesh, tap density 4-6g/cm3, is preferably
4.90g/cm3。
In another embodiment, a kind of preparation method of described alloy powder injection moulding feeding, including following step
Suddenly：
The alloy powder is added in kneading machine and is stirred heating by step S1.；
Step S2. adds the forming agent according to proportioning, is kneaded；
Step S3. extruding pelletizations.
In a preferred embodiment, in step S1, the metal dust is heated to 160 ± 5 DEG C of scope.
In a preferred embodiment, in step S2,25-35 revs/min of kneading machine rotating speed is set, stirs 10-30min.
In another embodiment, a kind of method of the alloy powder injection moulding feeding making product described in use, bag
Include following steps：
The metal dust is added in kneading machine and is stirred heating by step S1.；
The forming agent that step S2. adds according to proportioning, is kneaded；
Step S3. extruding pelletizations；
The PROCESS FOR TREATMENTs such as step S4. is injection moulded using the feeding of granulation, dumping, sintering are to obtain the product.
In an exemplary embodiment, the product can be 3C electronic product structural components.
In a specific embodiment, the preparation method of the feeding comprises the following steps：
S1, metal dust mixing preheating：Metal dust is heated to 160 ± 5 DEG C in kneading machine；
S2, mixing：Forming agent is added in the metal dust for having reached the predetermined temperature and be kneaded, setting kneading machine turns
Fast 25-35r/min, mixing time 10-30min, metal dust is set to form walk shape in advance with forming agent；
S3, extrusion granulator：Material after step S2 processing is sent into extruder, plasticizing, extrusion, and is granulated, is made
Obtain Feedstock of Powder Injection Molding.
Example 1：
The formula of feeding：
Preparation process：
1) powder mixing preheating：3r/min, it is heated to 160 DEG C；
2) mixing temperature：180~220 DEG C of times：30min；
3) extruding pelletization：30min.
Measured data：
Melt index：1100g/cm3
Constriction coefficient：1.158 ± 0.0025, average value：1.158
Density after sintering：7.73g/cm3
Product hardness：250HV
Consistency：95%
Toughness test pressure value：19N
Product repaired biscuit process procedure fraction defective：2%.
Wherein feeding toughness test uses following test method (similarly hereinafter)：
1. sample standard component is with 100mm model strip specifications：
100mm*10mm*3mm。
2. feeding injection moulding requires：
Base substrate standard component entirety and partial structurtes without shrink, flawless, imporosity and bubble inside idiosome.
3. testing standard：
Billet surface is pressed with diameter 8mm cylindrical metal, cylinder is diameter 8mm bottom surfaces with base substrate contact surface, and base substrate contacts
Face is 100mm*10mm planes, contacts and is completely attached to for periphery.Base substrate clamps fixed position and extruding point distance 20mm.
When base substrate is cracked, the cylinder force value that presses is base substrate fracture toughness pressure value.
Example 2：
The formula of feeding：
Preparation process：
1) powder mixing preheating：2r/min, it is heated to 160 DEG C；
2) mixing temperature：180~220 DEG C of times：30min；
3) extruding pelletization：30min.
Measured data：
Melt index：800g/cm3
Constriction coefficient：1.158 ± 0.0025, average value：1.158
Density after sintering：7.70g/cm3
Product hardness：240HV
Consistency：95%
Toughness test pressure value：18N
Product repaired biscuit process procedure fraction defective：2%.
Example 3：
The formula of feeding：
Preparation process：
1) powder mixing preheating：2r/min, it is heated to 160 DEG C；
2) mixing temperature：180~220 DEG C of times：30min；
3) extruding pelletization：30min.
Measured data：
Melt index 700g/cm3
Constriction coefficient：1.158 ± 0.0025, average value：1.158
Density after sintering：7.68g/cm3
Product hardness：265HV
Consistency：96%
Toughness test pressure value：20N
Product repaired biscuit process procedure fraction defective：1.5%.
Example 4：
The formula of feeding：
Preparation process：
1) powder mixing preheating：2r/min, it is heated to 165 DEG C；
2) mixing temperature：180~220 DEG C of times：30min；
3) extruding pelletization：30min.
Measured data：
Melt index：1050g/cm3
Constriction coefficient：1.158 ± 0.0025, average value：1.158
Density after sintering：7.75g/cm3
Product hardness：252HV
Consistency：97%
Toughness test pressure value：22N
Product repaired biscuit process procedure fraction defective：1.3%.
Comparative example：
The formula of feeding：
Using traditional MIM 17-4PH powder of stainless steel.
Preparation process：
1) powder mixing preheating：2r/min, it is heated to 160 DEG C；
2) mixing temperature：180~220 DEG C of times：30min；
3) extruding pelletization：30min.
Measured data：
Melt index：900g/cm3
Constriction coefficient：1.158 ± 0.0025, average value：1.158
Density after sintering：7.68g/cm3
Product hardness：260HV
Consistency：94%
Toughness test pressure value：12N
Product repaired biscuit process procedure fraction defective：12%.
Above content is to combine specific/preferred embodiment further description made for the present invention, it is impossible to is recognized
The specific implementation of the fixed present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Without departing from the inventive concept of the premise, it can also make some replacements or modification to the embodiment that these have been described,
And these are substituted or variant should all be considered as belonging to protection scope of the present invention.
Claims (7)
1. a kind of alloy powder is injection moulded feeding, it is characterised in that including forming agent and alloy powder, the forming agent and institute
The mass ratio for stating alloy powder is 0.85-1.05：9.15-8.95；
The alloy powder includes the component of following mass percent：Cr15.5%-17.5%, Ni3%-5%, Cu3%-5%,
Si≤1%, Mn≤1%, Nb0.15%-0.45%, Fe surplus；
The forming agent includes the component of following mass percent：1.5~3%POE；1.5~3%CPE；3~6% photo-thermal are stable
Agent；7~10% high density polyethylene (HDPE)s；7~10%EVA；2~4% paraffin；70~78% polyformaldehyde.
2. alloy powder as claimed in claim 1 is injection moulded feeding, it is characterised in that the granularity of the alloy powder expires
- 500 mesh of foot, tap density 4-6g/cm3.
A kind of 3. preparation method of alloy powder injection moulding feeding as claimed in claim 1 or 2, it is characterised in that including
Following steps：
S1. the alloy powder is added in kneading machine and is stirred heating；
S2. the forming agent is added according to proportioning, is kneaded；
S3. extruding pelletization.
4. the preparation method of alloy powder injection moulding feeding as claimed in claim 3, it is characterised in that, will in step S1
The metal dust is heated to 160 ± 5 DEG C of scope.
5. the preparation method of the alloy powder injection moulding feeding as described in claim 3 or 4, it is characterised in that in step S2,
25-35 revs/min of kneading machine rotating speed is set, stirs 10-30min.
6. a kind of method that alloy powder injection moulding feeding using as described in any one of Claims 1-4 makes product, its
It is characterised by, comprises the following steps：
S1. the metal dust is added in kneading machine and is stirred heating；
S2. the forming agent added according to proportioning, is kneaded；
S3. extruding pelletization；
S4. it is injection moulded using the feeding of granulation, dumping, sintering process handles to obtain the product.
7. method as claimed in claim 6, it is characterised in that the product is 3C electronic product structural components.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672695A (en) * | 2018-05-29 | 2018-10-19 | 东莞华晶粉末冶金有限公司 | A kind of metal powder injection molding feeding and preparation method thereof |
| CN108746609A (en) * | 2018-05-25 | 2018-11-06 | 合肥汇智新材料科技有限公司 | A kind of powder injection-molded batching out unit and dumping method |
| CN111644625A (en) * | 2020-06-04 | 2020-09-11 | 东睦新材料集团股份有限公司 | Preparation method of chromium alloy fuel cell connecting piece |
| CN114378293A (en) * | 2021-09-15 | 2022-04-22 | 东莞市环力智能科技有限公司 | Sintering process of austenitic stainless steel stirring head and stainless steel stirring head |
| CN114888277A (en) * | 2022-06-21 | 2022-08-12 | 海宁市三鑫剃须刀剪有限公司 | Wool shear blade powder metallurgy injection molding process |
| CN117653423A (en) * | 2023-12-11 | 2024-03-08 | 浙江扶康生物科技有限公司 | Titanium alloy femoral condyle prosthesis containing bionic porous thin layer, preparation method of titanium alloy femoral condyle prosthesis and artificial knee joint |
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| CN114378293A (en) * | 2021-09-15 | 2022-04-22 | 东莞市环力智能科技有限公司 | Sintering process of austenitic stainless steel stirring head and stainless steel stirring head |
| CN114378293B (en) * | 2021-09-15 | 2024-05-24 | 东莞市环力智能科技有限公司 | Sintering process of austenitic stainless steel stirring head and stainless steel stirring head |
| CN114888277A (en) * | 2022-06-21 | 2022-08-12 | 海宁市三鑫剃须刀剪有限公司 | Wool shear blade powder metallurgy injection molding process |
| CN117653423A (en) * | 2023-12-11 | 2024-03-08 | 浙江扶康生物科技有限公司 | Titanium alloy femoral condyle prosthesis containing bionic porous thin layer, preparation method of titanium alloy femoral condyle prosthesis and artificial knee joint |
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Address after: 523843 Dongguan City, Guangdong Province, Dongcheng Street Niu Shan outside the Industrial Park Wei Feng Road No. 2 Applicant after: Dongguan Hua Jing powder metallurgy company limited Applicant after: Guangdong wins smart group Limited by Share Ltd Address before: 523843 Dongguan City, Guangdong Province, Dongcheng Street Niu Shan outside the Industrial Park Wei Feng Road No. 2 Applicant before: Dongguan Hua Jing powder metallurgy company limited Applicant before: Dongguan Janus Precision Components Co., Ltd. |
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Application publication date: 20171124 |
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