CN108339974A - One kind 304 powder of stainless steel injection moulding feeding and preparation method thereof - Google Patents
One kind 304 powder of stainless steel injection moulding feeding and preparation method thereof Download PDFInfo
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- CN108339974A CN108339974A CN201810117214.5A CN201810117214A CN108339974A CN 108339974 A CN108339974 A CN 108339974A CN 201810117214 A CN201810117214 A CN 201810117214A CN 108339974 A CN108339974 A CN 108339974A
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- parts
- stainless steel
- powder
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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
- 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
-
- 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
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The present invention relates to a kind of 304 powder of stainless steel to be injection moulded feeding and preparation method thereof, including 304 stainless steel metal powder and forming agent, and the parts by weight of the 304 stainless steel metal powder are 90 92 parts, and the parts by weight of forming agent are 8 10 parts.It is an advantage of the invention that：This programme is formulated forming agent, with good fluidity, forming stability is high, degreasing speed is fast, the features such as product size is stablized, can be applied to the production for 304 stainless steel product of labyrinth that injection molding can work it out, and shorten the process-cycle of traditional 304 stainless steel parts production technologies, reduce enterprise's production cost, enterprise production efficiency.
Description
Technical field
The present invention relates to a kind of 304 powder of stainless steel to be injection moulded feeding and preparation method thereof.
Background technology
With being constantly progressive for social science and technology and flourishing for global industry, powder metallurgy injection molding technique due to
Its plurality of advantages, industry development is rapid, and technology has been widely used in the necks such as military affairs, traffic, machinery, electronics, space flight, aviation
Domain.
MIM feedings are core head section technique prepared by metal injection molding product, be by metal powder and forming agent according to
Certain proportion carries out the mixing of a period of time temperature, using screw rod under the conditions of certain temperature in being kneaded granulation all-in-one machine
Cutting granulation is squeezed out, injection moulding feeding is made.
304 stainless steel materials, because of manufactured fabricated part, corrosion-resistant and high-temperature resistant, processing performance is good, therefore is widely used in
Fiber optic communication industry and furniture decoration industry and food medical industry.
Because of 304 traditional stainless steel parts manufacturing methods, low production efficiency, processing difficulties high processing costs are complicated
Product can't process come, cannot be satisfied the manufacturing high speed development demand of modern society completely, 304 stainless steels are injected into
Entire 304 stainless steel industry has been reformed in the invention of type feeding, and by new technique, new preparation processing method reduces to reach
Cost carries and efficient manufactures 304 stainless steel parts production methods.
Invention content
To overcome the deficiencies of existing technologies, the present invention provides 304 powder of stainless steel of one kind injection moulding feeding and its preparation
Method, the technical scheme is that：
A kind of 304 powder of stainless steel injection moulding feeding, including 304 stainless steel metal powder and forming agent, 304 stainless steel gold
The parts by weight for belonging to powder are 90-92 parts, and the parts by weight of forming agent are 8-10 parts.
Forming agent include following parts by weight each component, half concise paraffin 30-32 parts；25-27 parts of microwax；It is highly dense
Spend 4-6 parts of polyethylene, 3-5 parts of vaseline；15-17 parts of polyformaldehyde, 17-19 parts of TPE.
The molecular weight 100,000-50 ten thousand of the high density polyethylene (HDPE).
A method of 304 powder of stainless steel injection moulding feeding is prepared, is included the following steps：
S1, each component is weighed according to proportioning；
S2, the mixing intracavitary that 304 stainless steel metal powder are placed in kneader, start kneader, rotate at a slow speed, rotating speed 4-6r/
Min, adjustment are kneaded chamber temperature, and 304 stainless steel metal powder of preheating are to 170-190 DEG C；
S3, after thermometer detects temperature >=170 DEG C of 304 stainless steel metal powder, be added forming agent, then improve rotating speed
To 30-40r/min, keep mixing chamber temperature to 175-185 DEG C, after forming agent all melts, then constant temperature 20-30min, after
It is cooled to room temperature extrusion granulator material；
S4, to granulation expect carry out mobility-detected, detection set temperature be 195 DEG C, counterweight weight 21.6kg, examination criteria be >=
800g/10min；
S5, granulation material are put into injection (mo(u)lding) machine, are injected to in-mold molding, specially：Mold selection criteria batten mold, sample
Die size 100mm*10mm*5mm, is installed on injection (mo(u)lding) machine, 80 DEG C~120 DEG C of mold temperature, and injector expects pipe is molten
Melt maximum temperature and be no more than 195 DEG C, ejection formation parameter is set, corresponding moulded products are obtained；Moulded products density be 5.4 ±
0.03g/cm3。
It is S6, degreasing sintered：To carrying out solvent degreasing after molded article removal, specially：Moulded products are steeped into 65-80 DEG C
Trichloro ethylene, complete ungrease treatment after impregnating 6 hours, then carry out vacuum-sintering, time 2 h, sintering vacuum degree 10-
500Pa, 1300 DEG C~1320 DEG C of temperature obtain hard metal article after coming out of the stove, density is more than 7.7g/cm3。
It is an advantage of the invention that：This programme is formulated forming agent, has good fluidity, and forming stability is high, and degreasing speed is fast,
The features such as product size is stablized, can be applied to the production for 304 stainless steel product of labyrinth that injection molding can work it out,
The process-cycle for shortening traditional 304 stainless steel parts production technologies, reduce enterprise's production cost, enterprise production efficiency.
Specific implementation mode
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and
It is apparent.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.People in the art
Member it should be understood that without departing from the spirit and scope of the invention can to the details of technical solution of the present invention and form into
Row modifications or substitutions, but these modifications and replacement are each fallen in protection scope of the present invention.
Embodiment 1：The present invention relates to a kind of 304 powder of stainless steel to be injection moulded feeding, including 304 stainless steel metal powder
And forming agent, the parts by weight of the 304 stainless steel metal powder are 90 points, and the parts by weight of forming agent are 8 parts.
Forming agent include following parts by weight each component, half 30 parts of concise paraffin；25 parts of microwax；High-density polyethylene
4 parts of alkene, 3 parts of vaseline；15 parts of polyformaldehyde, 17 parts of TPE.
The molecular weight 100,000 of the high density polyethylene (HDPE).
A method of preparing 304 powder of stainless steel injection moulding feeding, which is characterized in that include the following steps：
S1, each component is weighed according to proportioning；
S2, the mixing intracavitary that 304 stainless steel metal powder are placed in kneader, start kneader, rotate at a slow speed, rotating speed 4r/
Min, adjustment are kneaded chamber temperature, and 304 stainless steel metal powder of preheating are to 170 DEG C；
S3, after thermometer detects temperature >=170 DEG C of 304 stainless steel metal powder, be added forming agent, then improve rotating speed
To 30r/min, keep being kneaded chamber temperature to 175 DEG C, after forming agent all melts, then constant temperature 20min, after be cooled to room temperature
Extrusion granulator material；
S4, to granulation expect carry out mobility-detected, detection set temperature be 195 DEG C, counterweight weight 21.6kg, examination criteria be >=
800g/10min；
S5, granulation material are put into injection (mo(u)lding) machine, are injected to in-mold molding, specially：Mold selection criteria batten mold, sample
Size 100mm*10mm*5mm, is installed on injection (mo(u)lding) machine, 80 DEG C of mold temperature, and injector expects pipe melts maximum temperature not
More than 195 DEG C, ejection formation parameter is set, corresponding moulded products are obtained；Moulded products density is 5.37g/cm3。
It is S6, degreasing sintered：To carrying out solvent degreasing after molded article removal, specially：Moulded products are steeped into 65 DEG C
Trichloro ethylene completes ungrease treatment after impregnating 6 hours, then carries out vacuum-sintering, and time 2 h is sintered vacuum degree 10Pa, temperature
1300 DEG C of degree, obtains hard metal article after coming out of the stove, density is more than 7.7g/cm3。
Embodiment 2：The present invention relates to a kind of 304 powder of stainless steel to be injection moulded feeding, including 304 stainless steel metal powder
And forming agent, the parts by weight of the 304 stainless steel metal powder are 91 points, and the parts by weight of forming agent are 9 parts.Forming agent include
The each component of following parts by weight, half 31 parts of concise paraffin；26 parts of microwax；5 parts of high density polyethylene (HDPE), 4 parts of vaseline；Poly- first
16 parts of aldehyde, 18 parts of TPE.The molecular weight 300,000 of the high density polyethylene (HDPE).
A method of 304 powder of stainless steel injection moulding feeding is prepared, is included the following steps：
S1, each component is weighed according to proportioning；
S2, the mixing intracavitary that 304 stainless steel metal powder are placed in kneader, start kneader, rotate at a slow speed, rotating speed 5r/
Min, adjustment are kneaded chamber temperature, and 304 stainless steel metal powder of preheating are to 180 DEG C；
S3, after thermometer detects temperature >=170 DEG C of 304 stainless steel metal powder, be added forming agent, then improve rotating speed
To 35r/min, keep being kneaded chamber temperature to 180 DEG C, after forming agent all melts, then constant temperature 20-30min, after be down to room
Extrusion granulator material after temperature；
S4, to granulation expect carry out mobility-detected, detection set temperature be 195 DEG C, counterweight weight 21.6kg, examination criteria be >=
800g/10min；
S5, granulation material are put into injection (mo(u)lding) machine, are injected to in-mold molding, specially：Mold selection criteria batten mold, sample
Size 100mm*10mm*5mm, is installed on injection (mo(u)lding) machine, 100 DEG C of mold temperature, and injector expects pipe melts maximum temperature
No more than 195 DEG C, ejection formation parameter is set, corresponding moulded products are obtained；Moulded products density is 5.4g/cm3。
It is S6, degreasing sintered：To carrying out solvent degreasing after molded article removal, specially：Moulded products are steeped into 70 DEG C
Trichloro ethylene completes ungrease treatment after impregnating 6 hours, then carries out vacuum-sintering, and time 2 h is sintered vacuum degree 300Pa,
1310 DEG C of temperature, obtains hard metal article after coming out of the stove, density is more than 7.7g/cm3。
Embodiment 3：The present invention relates to a kind of 304 powder of stainless steel to be injection moulded feeding, including 304 stainless steel metal powder
The parts by weight of end and forming agent, the 304 stainless steel metal powder are 92 parts, and the parts by weight of forming agent are 10 parts.Forming agent
Include each component of following parts by weight, half 32 parts of concise paraffin；27 parts of microwax；6 parts of high density polyethylene (HDPE), 5 parts of vaseline；It is poly-
17 parts of formaldehyde, 19 parts of TPE.The molecular weight 500,000 of the high density polyethylene (HDPE).
A method of 304 powder of stainless steel injection moulding feeding is prepared, is included the following steps：
S1, each component is weighed according to proportioning；
S2, the mixing intracavitary that 304 stainless steel metal powder are placed in kneader, start kneader, rotate at a slow speed, rotating speed 6r/
Min, adjustment are kneaded chamber temperature, and 304 stainless steel metal powder of preheating are to 190 DEG C；
S3, after thermometer detects temperature >=170 DEG C of 304 stainless steel metal powder, be added forming agent, then improve rotating speed
To 40r/min, keep being kneaded chamber temperature to 185 DEG C, after forming agent all melts, then constant temperature 30min, after be cooled to room temperature
Extrusion granulator material；
S4, to granulation expect carry out mobility-detected, detection set temperature be 195 DEG C, counterweight weight 21.6kg, examination criteria be >=
800g/10min；
S5, granulation material are put into injection (mo(u)lding) machine, are injected to in-mold molding, specially：Mold selection criteria batten mold, sample
Size 100mm*10mm*5mm, is installed on injection (mo(u)lding) machine, 120 DEG C of mold temperature, and injector expects pipe melts maximum temperature
No more than 195 DEG C, ejection formation parameter is set, corresponding moulded products are obtained；Moulded products density is 5.43g/cm3。
It is S6, degreasing sintered：To carrying out solvent degreasing after molded article removal, specially：Moulded products are steeped into 80 DEG C
Trichloro ethylene completes ungrease treatment after impregnating 6 hours, then carries out vacuum-sintering, and time 2 h is sintered vacuum degree 500Pa,
1320 DEG C of temperature, obtains hard metal article after coming out of the stove, density is more than 7.7g/cm3。
The test data that feeding is injection moulded about 304 powder of stainless steel of the application is as follows：
1）Degreasing rate：
Mobility：It is detected for Melt Flow Rate Measurer；
Weight before degreasing：For the injection molding blank total weight of feeding product（The weight being packed into before debinding furnace）；
Weight after degreasing：The product total weight after degreasing fat technique is carried out for product, because degreasing can decompose a part of forming agent
Fall, so this technique just will produce a weight difference, while this weight difference be also judge product ungrease treatment index it
One.
2）Sintered density：304 stainless steel products after degreasing carry out the product actual density after vacuum-sintering.
Hardness：The Vickers hardness number of stainless steel product after sintering；
Product mold size：The actual processing size of product mold cavity；
Size after sintering：Injection product becomes the size after stainless steel product after carrying out vacuum-sintering：
Shrinking percentage：The ratio of product mold size and product size after sintering.
Claims (4)
1. a kind of 304 powder of stainless steel are injection moulded feeding, which is characterized in that including 304 stainless steel metal powder and forming agent,
The parts by weight of the 304 stainless steel metal powder are 90-92 parts, and the parts by weight of forming agent are 8-10 parts.
2. a kind of 304 powder of stainless steel according to claim 1 is injection moulded feeding, which is characterized in that forming agent
Include each component of following parts by weight, half concise paraffin 30-32 parts；25-27 parts of microwax；4-6 parts of high density polyethylene (HDPE), all scholars
3-5 parts of woods；15-17 parts of polyformaldehyde, 17-19 parts of TPE.
3. a kind of 304 powder of stainless steel according to claim 2 is injection moulded feeding, which is characterized in that described is highly dense
Spend the molecular weight 100,000-50 ten thousand of polyethylene.
4. a kind of method preparing 304 powder of stainless steel of claims 1 to 3 any one injection moulding feeding, which is characterized in that
Include the following steps：
S1, each component is weighed according to proportioning；
S2, the mixing intracavitary that 304 stainless steel metal powder are placed in kneader, start kneader, rotate at a slow speed, rotating speed 4-6r/
Min, adjustment are kneaded chamber temperature, and 304 stainless steel metal powder of preheating are to 170-190 DEG C；
S3, after thermometer detects temperature >=170 DEG C of 304 stainless steel metal powder, be added forming agent, then improve rotating speed
To 30-40r/min, keep mixing chamber temperature to 175-185 DEG C, after forming agent all melts, then constant temperature 20-30min, after
It is cooled to room temperature extrusion granulator material；
S4, to granulation expect carry out mobility-detected, detection set temperature be 195 DEG C, counterweight weight 21.6kg, examination criteria be >=
800g/10min；
S5, granulation material are put into injection (mo(u)lding) machine, are injected to in-mold molding, specially：Mold selection criteria batten mold, sample
Die size 100mm*10mm*5mm, is installed on injection (mo(u)lding) machine, 80 DEG C~120 DEG C of mold temperature, and injector expects pipe is molten
Melt maximum temperature and be no more than 195 DEG C, ejection formation parameter is set, corresponding moulded products are obtained；Moulded products density be 5.4 ±
0.03g/cm3；
It is S6, degreasing sintered：To carrying out solvent degreasing after molded article removal, specially：Moulded products are steeped three into 65-80 DEG C
Vinyl chloride completes ungrease treatment after impregnating 6 hours, then carries out vacuum-sintering, and time 2 h is sintered vacuum degree 10-500Pa,
1300 DEG C~1320 DEG C of temperature, obtains hard metal article after coming out of the stove, density is more than 7.7g/cm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810117214.5A CN108339974A (en) | 2018-02-06 | 2018-02-06 | One kind 304 powder of stainless steel injection moulding feeding and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810117214.5A CN108339974A (en) | 2018-02-06 | 2018-02-06 | One kind 304 powder of stainless steel injection moulding feeding and preparation method thereof |
Publications (1)
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| CN108339974A true CN108339974A (en) | 2018-07-31 |
Family
ID=62958604
Family Applications (1)
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| CN201810117214.5A Pending CN108339974A (en) | 2018-02-06 | 2018-02-06 | One kind 304 powder of stainless steel injection moulding feeding and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109702204A (en) * | 2019-03-07 | 2019-05-03 | 湖南英捷高科技有限责任公司 | A kind of outer diameter is less than or equal to the 420 stainless steel biopsy forceps and its MIM preparation process of 1mm |
| CN113579228A (en) * | 2021-08-05 | 2021-11-02 | 冈奇金属科技（上海）有限公司 | Binder for metal powder injection molding, feed containing binder and manufacturing method of feed |
| CN114559042A (en) * | 2022-03-08 | 2022-05-31 | 合肥工业大学 | Preparation method of injection molding feed containing surface-treated stainless steel powder and functionalized binder |
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| CN114559042A (en) * | 2022-03-08 | 2022-05-31 | 合肥工业大学 | Preparation method of injection molding feed containing surface-treated stainless steel powder and functionalized binder |
| CN114559042B (en) * | 2022-03-08 | 2023-07-21 | 合肥工业大学 | Preparation method of injection molding feed containing surface-treated stainless steel powder and functionalized binder |
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Effective date of registration: 20190808 Address after: 523000 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: 523000 No. 2 Weifeng Road, Niushan External Economic Industrial Park, Dongcheng Street, Dongguan City, Guangdong Province Applicant before: Dongguan Hua Jing powder metallurgy company limited Applicant before: Guangdong wins smart group Limited by Share Ltd |
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Application publication date: 20180731 |