CN107377975A - Alloy powder injection moulding feeding and preparation method thereof - Google Patents

Alloy powder injection moulding feeding and preparation method thereof Download PDF

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Publication number
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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CN
China
Prior art keywords
alloy powder
feeding
forming agent
injection moulding
product
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Pending
Application number
CN201710482504.5A
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Chinese (zh)
Inventor
张柯
张伟明
庞前列
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Janus Dongguan Precision Components Co Ltd
Dongguan Huajing Powder Metallurgy Co Ltd
Original Assignee
Janus Dongguan Precision Components Co Ltd
Dongguan Huajing Powder Metallurgy Co Ltd
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Filing date
Publication date
Application filed by Janus Dongguan Precision Components Co Ltd, Dongguan Huajing Powder Metallurgy Co Ltd filed Critical Janus Dongguan Precision Components Co Ltd
Priority to CN201710482504.5A priority Critical patent/CN107377975A/en
Publication of CN107377975A publication Critical patent/CN107377975A/en
Pending legal-status Critical Current

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Classifications

    • 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

Alloy powder injection moulding feeding and preparation method thereof
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.
CN201710482504.5A 2017-06-22 2017-06-22 Alloy powder injection moulding feeding and preparation method thereof Pending CN107377975A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
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

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CN104227003A (en) * 2014-09-01 2014-12-24 东莞劲胜精密组件股份有限公司 Preparation method of powder injection molded feeding material
CN104593693A (en) * 2013-10-31 2015-05-06 精工爱普生株式会社 Metal powder for powder metallurgy, compound, granulated powder, and sintered body
CN105478742A (en) * 2015-11-27 2016-04-13 上海三展新材料科技有限公司 Feeding formula in metal injection molding technology and preparation technology thereof
CN105728730A (en) * 2016-04-08 2016-07-06 玉溪大红山矿业有限公司 Stainless steel-based feedstock for injection molding and preparation method thereof

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JPH01180903A (en) * 1988-01-11 1989-07-18 Tokin Corp Manufacture of composite material
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Publication number Priority date Publication date Assignee Title
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
CN108746609B (en) * 2018-05-25 2023-05-23 合肥汇智新材料科技有限公司 Powder injection molding glue discharging device and glue discharging method
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
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
CN111644625B (en) * 2020-06-04 2022-05-24 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
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

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