CN107511484A - A kind of stainless steel injection moulding feeding and preparation method thereof - Google Patents

A kind of stainless steel injection moulding feeding and preparation method thereof Download PDF

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Publication number
CN107511484A
CN107511484A CN201710696267.2A CN201710696267A CN107511484A CN 107511484 A CN107511484 A CN 107511484A CN 201710696267 A CN201710696267 A CN 201710696267A CN 107511484 A CN107511484 A CN 107511484A
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CN
China
Prior art keywords
stainless steel
feeding
injection moulding
powder
binder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710696267.2A
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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.)
Guangdong Janus Intelligent Group Corp Ltd
Dongguan Huajing Powder Metallurgy Co Ltd
Original Assignee
Guangdong Janus Intelligent Group Corp Ltd
Dongguan Huajing Powder Metallurgy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Janus Intelligent Group Corp Ltd, Dongguan Huajing Powder Metallurgy Co Ltd filed Critical Guangdong Janus Intelligent Group Corp Ltd
Priority to CN201710696267.2A priority Critical patent/CN107511484A/en
Publication of CN107511484A publication Critical patent/CN107511484A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F1/00Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
    • B22F1/0003Metallic powders per se; Mixtures of metallic powders; Metallic powders mixed with a lubricating or binding agent
    • B22F1/0059Metallic powders mixed with a lubricating or binding agent or organic material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/22Manufacture 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
    • B22F3/225Manufacture 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

The invention discloses a kind of stainless steel injection moulding feeding and preparation method thereof, stainless steel injection moulding feeding includes binder and stainless steel feeding powder, wherein binder includes the paraffin of following mass percent 44% 55%, 6 15% microwax, 15 20% polypropylene wax, 3 5% POE, 4 7% epoxidized soybean oil, and 5 10% high density polyethylene (HDPE), the mass ratio of binder and stainless steel feeding powder is 8 10:90‑92.Using stainless steel injection moulding feeding as MIM feedings, there is high amalgamation, the high fluidity significantly improved, its melt index >=1500g/10min compared to traditional stainless steel injection moulding feeding.The big part product that is injection moulded out using the feeding by MIM techniques it is possible to prevente effectively from black line, shrink etc. because fusion, poor fluidity cause the defects of.

Description

A kind of stainless steel injection moulding feeding and preparation method thereof
Technical field
The present invention relates to a kind of stainless steel injection moulding feeding and preparation method thereof.
Background technology
Powder metallurgy is to produce metal dust or by the use of metal dust as raw material, by shaping and sintering, produces metal material The industrial technology of material, composite and all kinds product.Its cost is cheap, and it is all can to produce the product of various complicated shapes etc. More advantages, more and more it is used for manufacturing parts machining.But also occur while large area is popularized a series of Technical barrier.
It is well known that MIM (metal powder injection molded) technique can process various special-shaped, small volume type parts, such as Mobile phone Kato neck, connector.MIM techniques are extended to special-shaped big part metalwork, such as cell phone rear cover, center, because of its raw material stream Dynamic property and amalgamation can not reach relative standard's requirement, cause the product after MIM processing to occur that surface shrink, structure are endless Whole, the defects of consistency is low, material property is not up to standard.This is also one of the main reason for MIM techniques fail developing abnormal shape big part.
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 one kind has high amalgamation, high fluidity Stainless steel injection moulding feeding and preparation method thereof.
To achieve the above object, the present invention uses following technical scheme:
A kind of stainless steel is injection moulded feeding, including binder and stainless steel feeding powder;
The binder includes the component of following mass percent:
The mass ratio of the binder and the stainless steel feeding powder is 8-10:90-92.
Further:
The stainless steel feeding powder contains the component of following parts by weight:
Chromium Cr:16.00-18.00
Nickel:10.00-14.00
Molybdenum Mo:2.00-3.00
Carbon C:≤0.030
Silicon Si:≤1.00
Manganese Mn:≤2.00
Sulphur S:≤0.030
Phosphorus P:≤0.045.
Fe:65-71
The stainless steel feeding powder is 316L powder of stainless steel.
The granularity of the stainless steel feeding powder is 25 ± 5 μm, tap density:4.7±0.5g/cm3
The melt index of the feeding is not less than 1500g/10min.
A kind of preparation method of the stainless steel injection moulding feeding, including:According to proportioning by the binder with it is described Stainless steel feeding powder is kneaded, but extruding pelletization.
Further:
Comprise the following steps:
S1, the stainless steel feeding powder to be mixed is preheating to 130-150 DEG C;
S2, will the binder add kneading machine in carry out heating mix to melting bulk, kneading machine rotating speed 10-15r/ Min, 150-170 DEG C of melting temperature;
S3, the preheated stainless steel feeding powder is added in the binding agent of melting and continues to be kneaded, keep being kneaded Vacuum in machine, kneading machine rotating speed 20-35r/min, 150-170 DEG C of design temperature, mixing time 20-40min;
S4, extruding pelletization, stainless steel injection moulding feeding is made.
A kind of method that product is made using MIM techniques, be injection moulded using stainless steel injection moulding feeding, Degreasing, sintering MIM PROCESS FOR TREATMENTs obtain the product.
A kind of method that product is made using MIM techniques, is comprised the following steps:
Using the preparation method of stainless steel injection moulding feeding prepares the stainless steel and is injection moulded feeding;
Using the stainless steel injection moulding feeding be injection moulded, degreasing, sintering MIM PROCESS FOR TREATMENTs obtain the production Product.
A kind of MIM products, it is the product being made by the method that product is made using MIM techniques, it is preferable that described Product is 3C Electronic Equipment Structural Members.
Beneficial effects of the present invention have:
Stainless steel injection moulding feeding provided by the invention uses the special formulation of binder and stainless steel feeding powder, its Middle binder includes following mass percent 44%-55% paraffin, 6-15% microwax, 15-20% polypropylene wax, 3- 5% ethylene-octene copolymer, 4-7% epoxidized soybean oil, and 5-10% high density polyethylene (HDPE), binder and stainless The mass ratio of steel feeding powder is 8-10:90-92, the stainless steel is injection moulded feeding as MIM feedings, compared to it is traditional not Rust steel injection moulding feeding has high amalgamation, the high fluidity significantly improved, its melt index >=1500g/10min.Use The stainless steel be injection moulded feeding, the big part product being injection moulded out by MIM techniques it is possible to prevente effectively from black line, shrink etc. because The defects of fusion, poor fluidity cause, the structural member product needed for suitable for various 3C electronic equipments can be gone out with processing and fabricating, especially Suitable for the various structural members special-shaped, volume is larger such as processing mobile phone bonnet.
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 stainless steel injection moulding feeding, including binder and stainless steel feeding powder;
The binder includes the component of following mass percent:
The mass ratio of the binder and the stainless steel feeding powder is 8-10:90-92.
In a preferred embodiment, the stainless steel feeding powder contains the component of following parts by weight:
Chromium Cr:16.00-18.00
Nickel:10.00-14.00
Molybdenum Mo:2.00-3.00
Carbon C:≤0.030
Silicon Si:≤1.00
Manganese Mn:≤2.00
Sulphur S:≤0.030
Phosphorus P:≤0.045.
Fe:65-71
In a preferred embodiment, the stainless steel feeding powder can use 316L powder of stainless steel.
In a preferred embodiment, the granularity of the stainless steel feeding powder is 25 ± 5 μm, tap density:4.7±0.5g/ cm3
In a preferred embodiment, the melt index of the feeding is not less than 1500g/10min.
In another embodiment, a kind of preparation method of the stainless steel injection moulding feeding, including:Will according to proportioning The binder is kneaded with the stainless steel feeding powder, but extruding pelletization.
In a preferred embodiment, the preparation method comprises the following steps:
S1, the stainless steel feeding powder to be mixed is preheating to 130-150 DEG C;
S2, will the binder add kneading machine in carry out heating mix to melting bulk, kneading machine rotating speed 10-15r/ Min, 150-170 DEG C of melting temperature;
S3, the preheated stainless steel feeding powder is added in the binding agent of melting and continues to be kneaded, keep being kneaded Vacuum in machine, kneading machine rotating speed 20-35r/min, 150-170 DEG C of design temperature, mixing time 20-40min;
S4, extruding pelletization, stainless steel injection moulding feeding is made.
In another embodiment, a kind of method that product is made using MIM techniques, it is injection moulded using the stainless steel Feeding is injection moulded, degreasing, sintering MIM PROCESS FOR TREATMENTs obtain the product.
In another embodiment, a kind of method that product is made using MIM techniques, comprise the following steps:
Using the preparation method of stainless steel injection moulding feeding prepares the stainless steel and is injection moulded feeding;
Using the stainless steel injection moulding feeding be injection moulded, degreasing, sintering MIM PROCESS FOR TREATMENTs obtain the production Product.
In another embodiment, a kind of MIM products, it is made by the method that product is made using MIM techniques Product, it is preferable that the product is 3C Electronic Equipment Structural Members.
Instantiation and comparative example:
Example one
Feeding includes following components:
Feeding is prepared, and the process of MIM products is made using feeding:
S1, metal dust to be mixed is heated to 130-150 DEG C on hot plate.
S2, heating mixing will be carried out in the binding agent prepared addition kneading machine, to thawing (lumps), kneading machine rotating speed 10-15r/min, 150-170 DEG C of design temperature.
S3, preheated metal dust is added in the binding agent melted and continues to be kneaded, be well mixed, keep being kneaded Vacuum in machine.Kneading machine rotating speed 20-35r/min, 150-170 DEG C of design temperature, mixing time 20-40min.
S4, extrusion granulator:Material after step S2 processing is sent into extruder, plasticizing, extrusion, and is granulated, is made Obtain Feedstock of Powder Injection Molding.
S5, be injection moulded using Feedstock of Powder Injection Molding, degreasing, sintering MIM PROCESS FOR TREATMENTs obtain the product.
Detect the performance of feeding:Melt index is 2000g/10min.
It is good to detect structural integrity, the outward appearance of product, it is bad without black line, scarce material etc..
Example two
Feeding includes following components:
The process for preparing feeding and MIM products being made using feeding is identical with example one.
Detect the performance of feeding:Melt index is 1700g/10min.
It is good to detect structural integrity, the outward appearance of product, it is bad without black line, scarce material etc..
Example three
Feeding includes following components:
The process for preparing feeding and MIM products being made using feeding is identical with example one.
Detect the performance of feeding:Melt index is 2200g/10min.
It is good to detect structural integrity, the outward appearance of product, it is bad without black line, scarce material etc..
Example four
Feeding includes following components:
The process for preparing feeding and MIM products being made using feeding is identical with example one.
Detect the performance of feeding:Melt index is 1850g/10min.
It is good to detect structural integrity, the outward appearance of product, it is bad without black line, scarce material etc..
Example five
Feeding includes following components:
The process for preparing feeding and MIM products being made using feeding is identical with example one.
Detect the performance of feeding:Melt index is 2000g/10min.
It is good to detect structural integrity, the outward appearance of product, it is bad without black line, scarce material etc..
Comparative example
Feeding, feeding performance detection are injection moulded using traditional 316L stainless steels:Melt index is 800g/10min.
MIM products are made using traditional feeding, because amalgamation is poor, causes product fusion position associativity poor, has into parison Black line, shrink after sintering.
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 (10)

1. a kind of stainless steel is injection moulded feeding, it is characterised in that including binder and stainless steel feeding powder;
The binder includes the component of following mass percent:
The mass ratio of the binder and the stainless steel feeding powder is 8-10:90-92.
2. stainless steel as claimed in claim 1 is injection moulded feeding, it is characterised in that the stainless steel feeding powder contain as The component of lower parts by weight:
Chromium Cr:16.00-18.00
Nickel:10.00-14.00
Molybdenum Mo:2.00-3.00
Carbon C:≤0.030
Silicon Si:≤1.00
Manganese Mn:≤2.00
Sulphur S:≤0.030
Phosphorus P:≤0.045
Fe:65-71.
3. stainless steel as claimed in claim 1 is injection moulded feeding, it is characterised in that the stainless steel feeding powder is 316L Powder of stainless steel.
4. the stainless steel injection moulding feeding as described in any one of claims 1 to 3, it is characterised in that the stainless steel feeding The granularity of powder is 25 ± 5 μm, tap density:4.7±0.5g/cm3
5. the stainless steel injection moulding feeding as described in any one of Claims 1-4, it is characterised in that the melting of the feeding Index is not less than 1500g/10min.
A kind of 6. preparation method of stainless steel injection moulding feeding as described in any one of claim 1 to 5, it is characterised in that Including:The binder and the stainless steel feeding powder are kneaded according to proportioning, but extruding pelletization.
7. the preparation method of stainless steel injection moulding feeding as claimed in claim 6, it is characterised in that comprise the following steps:
S1, the stainless steel feeding powder to be mixed is preheating to 130-150 DEG C;
S2, will the binder add kneading machine in carry out heating mix to melting bulk, kneading machine rotating speed 10-15r/min, mix Refine 150-170 DEG C of temperature;
S3, the preheated stainless steel feeding powder is added in the binding agent of melting and continues to be kneaded, kept in kneading machine Vacuum, kneading machine rotating speed 20-35r/min, 150-170 DEG C of design temperature, mixing time 20-40min;
S4, extruding pelletization, stainless steel injection moulding feeding is made.
A kind of 8. method that product is made using MIM techniques, it is characterised in that using as described in any one of claim 1 to 5 Stainless steel injection moulding feeding be injection moulded, degreasing, sintering MIM PROCESS FOR TREATMENTs obtain the product.
A kind of 9. method that product is made using MIM techniques, it is characterised in that comprise the following steps:
Usage right requires that the method described in 6 to 7 any one prepares the stainless steel injection moulding feeding;
Using the stainless steel injection moulding feeding be injection moulded, degreasing, sintering MIM PROCESS FOR TREATMENTs obtain the product.
10. a kind of MIM products, it is characterised in that be by the product that such as methods described of claim 8 or 9 is made, preferably Ground, the product are 3C Electronic Equipment Structural Members.
CN201710696267.2A 2017-08-15 2017-08-15 A kind of stainless steel injection moulding feeding and preparation method thereof Pending CN107511484A (en)

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN108202139A (en) * 2017-12-28 2018-06-26 东莞华晶粉末冶金有限公司 Metal powder injection molding feeding and preparation method thereof
CN108380867A (en) * 2018-02-02 2018-08-10 东莞华晶粉末冶金有限公司 Low-cost and high-performance 17-4PH cerul stainless steel feedings and preparation method thereof
CN108380866A (en) * 2018-02-02 2018-08-10 东莞华晶粉末冶金有限公司 A kind of low cost 440C stainless steel cerul feedings and preparation method thereof
CN108380869A (en) * 2018-03-15 2018-08-10 东莞华晶粉末冶金有限公司 Inexpensive 310 powder of stainless steel injection moulding cerul feeding and preparation method thereof
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
CN109047750A (en) * 2018-07-18 2018-12-21 东莞华晶粉末冶金有限公司 The preparation method of 310 powder of stainless steel feeding of environment-friendly type and 310 powder of stainless steel components
CN109047749A (en) * 2018-07-18 2018-12-21 东莞华晶粉末冶金有限公司 The preparation method of environment-friendly type cemented carbide powder feeding and hard alloy components
CN110000389A (en) * 2019-03-14 2019-07-12 全亿大科技(佛山)有限公司 The preparation method of stainless steel

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108202139A (en) * 2017-12-28 2018-06-26 东莞华晶粉末冶金有限公司 Metal powder injection molding feeding and preparation method thereof
CN108380867A (en) * 2018-02-02 2018-08-10 东莞华晶粉末冶金有限公司 Low-cost and high-performance 17-4PH cerul stainless steel feedings and preparation method thereof
CN108380866A (en) * 2018-02-02 2018-08-10 东莞华晶粉末冶金有限公司 A kind of low cost 440C stainless steel cerul feedings and preparation method thereof
CN108380869A (en) * 2018-03-15 2018-08-10 东莞华晶粉末冶金有限公司 Inexpensive 310 powder of stainless steel injection moulding cerul feeding and preparation method thereof
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
CN109047750A (en) * 2018-07-18 2018-12-21 东莞华晶粉末冶金有限公司 The preparation method of 310 powder of stainless steel feeding of environment-friendly type and 310 powder of stainless steel components
CN109047749A (en) * 2018-07-18 2018-12-21 东莞华晶粉末冶金有限公司 The preparation method of environment-friendly type cemented carbide powder feeding and hard alloy components
CN110000389A (en) * 2019-03-14 2019-07-12 全亿大科技(佛山)有限公司 The preparation method of stainless steel

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