CN109047750A - The preparation method of 310 powder of stainless steel feeding of environment-friendly type and 310 powder of stainless steel components - Google Patents
The preparation method of 310 powder of stainless steel feeding of environment-friendly type and 310 powder of stainless steel components Download PDFInfo
- Publication number
- CN109047750A CN109047750A CN201810792375.4A CN201810792375A CN109047750A CN 109047750 A CN109047750 A CN 109047750A CN 201810792375 A CN201810792375 A CN 201810792375A CN 109047750 A CN109047750 A CN 109047750A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- powder
- feeding
- parts
- preparation
- 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
Links
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
- B22F1/102—Metallic powder coated with 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
- 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
- B22F1/108—Mixtures obtained by warm mixing
Abstract
The present invention relates to a kind of 310 powder of stainless steel feedings of environment-friendly type and preparation method thereof, including 310 powder of stainless steel and forming agent, the two to prepare by weight the ratio of 100:2~100:5；The granularity of 310 powder of stainless steel is 500 mesh, tap density 4.5-4.8g/cm3, used auxiliary material when sintered carbide ball is planetary ball mill machine mixing accounts for the 30%-50% of all material total weight.The diameter 5mm-10mm of the sintered carbide ball.The invention has the advantages that passing through 310 stainless steel metal powder pressing forming feedings of invention and preparation method, change traditional 310 stainless steels, processing difficulties, process-cycle is long, the high disadvantage of processing cost, the production and processing cost for greatly reducing by 310 stainless steel parts of complexity responds country and calls, and improves domestic manufacturing industry technological innovation production level.
Description
Technical field
The present invention relates to the preparation methods of a kind of 310 powder of stainless steel feedings and 310 powder of stainless steel feeding components.
Background technique
With being constantly progressive for social science and technology and flourishing for global industry, powder metallurgical production technique is all due to its
More advantages, industry development is rapid, and technology has been widely used in the fields such as military affairs, traffic, machinery, electronics, space flight, aviation.
Feeding be metal powder metallurgy product preparation core head section technique, the preparation method of feeding be by metal powder with
The two according to a certain percentage, under certain condition, is homogenously mixed together by forming agent using equipment.
310 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, furniture decoration industry and food medical treatment etc. industry.
Because of traditional 310 stainless steel parts manufacturing methods (vehicle mill, is milled, cut, sparking etc. machining), production efficiency
Low, processing difficulties processing cost is high, and certain complicated products, which can't process, to be come, and is unable to satisfy modern society's system completely
Make the high speed development demand of industry.
Summary of the invention
To overcome the shortcomings of existing technologies, the present invention provides 10 powder of stainless steel feedings of one kind and 310 powder of stainless steel are fed
Expect the preparation method of components, the technical scheme is that
A kind of 310 powder of stainless steel feeding of environment-friendly type, including 310 powder of stainless steel and forming agent, the two by weight 100:2~
The ratio of 100:5 is prepared；The granularity of 310 powder of stainless steel is 500 mesh, tap density 4.5-4.8g/cm3。
The forming agent includes each component of following parts by weight, and half concise paraffin wax 39-41 parts, white bee is 39-41 parts cured, gathers
19-21 parts of ethylene glycol.
40 parts of the concise paraffin wax of described half, cured 40 parts, 20 parts of polyethylene glycol of white bee.
A method of preparing 310 powder of stainless steel feeding of environment-friendly type, comprising the following steps:
(1) 310 powder of stainless steel are poured into planet kneading machine to be kneaded in tank, adds each component of forming agent；
(2) the analysis alcohol that sintered carbide ball, 85 DEG C of pure water, concentration are greater than 90% is then sequentially added, covers and is kneaded cover
After lock；Wherein, the total weight of the sintered carbide ball of addition is the 30%-50% of powder and forming agent total weight；The hard
The diameter 5mm-10mm of alloying pellet；Wherein, sintered carbide ball, pure water and analytically pure plastid ratio are 1: 1: 1；
(3) open machine operation machine, revolving speed 400 turns/min, runing time 30min, after take out be kneaded tank in feeding mixture；
(4) feeding mixture is put into electric oven, 55 DEG C of temperature, toasts 30min, it is rear to take out, it grinds.
(5) it grinds after feeding powder crosses 30 mesh stainless steel mesh, completes feeding preparation.
A kind of preparation method of 310 stainless steel metal part, comprising the following steps:
S4, selection take the mold of required product specification, are installed on pressure forming machine, and the feeding of preparation is packed into pressure forming machine
Interior, processing forms manufactured part blank, and manufactured part blank pressure is 9-12 tons every square centimeter, dwell time 0.5-1 second, close
Scale standard is 5.8 ± 0.03g/cm3；
S5, manufactured part blank is packed into closed pressure sintering furnace, carries out vacuum-sintering, be sintered vacuum degree 10Pa-
500Pa, obtains 310 stainless steel metal parts products, density >=7.8g/cm by 1220 DEG C~1240 DEG C of temperature after coming out of the stove3。
The invention has the advantages that being changed by 310 stainless steel metal powder pressing forming feedings of invention and preparation method
Traditional 310 stainless steels, processing difficulties, the process-cycle is long, the high disadvantage of processing cost, greatly reduces by 310 stainless steel zero of complexity
The production and processing cost of part responds country and calls, and improves domestic manufacturing industry technological innovation production level.
Specific embodiment
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.Those skilled in the art
Member it should be understood that without departing from the spirit and scope of the invention can details to technical solution of the present invention and form into
Row modifications or substitutions, but these modifications and replacement are fallen within the protection scope of the present invention.
Embodiment 1: a kind of 310 powder of stainless steel feeding of environment-friendly type, including 310 powder of stainless steel and forming agent, the two are pressed
Weight ratio 100:2 ratio is prepared；The granularity of 310 powder of stainless steel is 500 mesh, tap density 4.5g/cm3。
The forming agent includes each component of following parts by weight, half 39 parts of concise paraffin wax, cured 39 parts of white bee, polyethylene glycol
19 parts.Semi-refined paraffin wax fusing point is low >=and 60 DEG C, tensile strength, caking property is good, and cleanliness is high, and chemical stability is good, is not easily decomposed.
Cera alba improves feeding chemical stability, is not easily decomposed, and enhances mobility；The AR grade molecular weight 2000-6000 of polyethylene glycol.
The features such as this programme forming agent has forming stability good, and degreasing speed is fast, product size stabilization and asepsis environment-protecting,
It can be applied to 310 stainless steel metal products of the labyrinth that various compacting tool sets can work it out.
A method of preparing 310 powder of stainless steel feeding of environment-friendly type, comprising the following steps:
(1) 310 powder of stainless steel are poured into planet kneading machine to be kneaded in tank, adds each component of forming agent；
(2) the analysis alcohol (alcohol) that sintered carbide ball, 85 DEG C of pure water, concentration are greater than 90% is then sequentially added, mixing is covered
It is locked after cover；Wherein, the total weight of the sintered carbide ball of addition is the 30% of powder and forming agent total weight；Described is hard
The diameter 5mm of matter alloying pellet.
Wherein, sintered carbide ball, the sintered carbide ball that pure water and analytically pure plastid ratio are 1: 1: 1(, that is, 1g,
The pure water of 1ml and the analysis alcohol of 1ml)；Sintered carbide ball does not participate in reaction in ball milling mixing process, and ball milling calendering process is complete
It all takes out, plays the role of as auxiliary stirring material at rear；
(3) open machine operation machine, revolving speed 400 turns/min, runing time 30min, after take out be kneaded tank in feeding mixture；
(4) feeding mixture is put into electric oven, 55 DEG C of temperature, toasts 30min, it is rear to take out, it grinds.
(5) it grinds after feeding powder crosses 30 mesh stainless steel mesh, completes feeding preparation.
A kind of preparation method of 310 stainless steel metal part, comprising the following steps:
S4, selection take the mold of required product specification, are installed on pressure forming machine, and the feeding of preparation is packed into pressure forming machine
It is interior, it processes and forms manufactured part blank, 9 tons every square centimeter of manufactured part blank pressure, the dwell time 0.5 second, density criterion
For 5.97g/cm3；
S5, manufactured part blank is packed into closed pressure sintering furnace, carries out vacuum-sintering, be sintered vacuum degree 10Pa, temperature
1220 DEG C, 310 stainless steel metal parts products, density 7.8g/cm are obtained after coming out of the stove3。
Embodiment 2: a kind of 310 powder of stainless steel feeding of environment-friendly type, including 310 powder of stainless steel and forming agent, the two are pressed
The ratio of weight ratio 100:3 is prepared；The granularity of 310 powder of stainless steel is 500 mesh, tap density 4.6g/cm3；It is described
Sintered carbide ball diameter 8mm.
40 parts of the concise paraffin wax of described half, cured 40 parts of white bee, 20 parts of polyethylene glycol,.
A method of preparing 310 powder of stainless steel feeding of environment-friendly type, comprising the following steps:
(1) 310 powder of stainless steel are poured into planet kneading machine to be kneaded in tank, adds each component of forming agent；
(2) the analysis alcohol that sintered carbide ball, 85 DEG C of pure water, concentration are greater than 90% is then sequentially added, covers and is kneaded cover
After lock；Wherein, the total weight of the sintered carbide ball of addition is the 40% of powder and forming agent total weight；It is sintered carbide ball, pure
Sintered carbide ball, the pure water of 1ml and the analysis alcohol of 1ml that water and analytically pure plastid ratio are 1: 1: 1(, that is, 1g), it is described
Sintered carbide ball diameter 8mm.
(3) open machine operation machine, revolving speed 400 turns/min, runing time 30min, after take out that be kneaded feeding in tank mixed
Close object；
(4) feeding mixture is put into electric oven, 55 DEG C of temperature, toasts 30min, it is rear to take out, it grinds.
(5) it grinds after feeding powder crosses 30 mesh stainless steel mesh, completes feeding preparation.
A kind of preparation method of 310 stainless steel metal part, comprising the following steps:
S4, selection take the mold of required product specification, are installed on pressure forming machine, and the feeding of preparation is packed into pressure forming machine
It is interior, it processes and forms manufactured part blank, 10 tons every square centimeter of manufactured part blank pressure, the dwell time 0.8 second, density criterion
For 5.8g/cm3；
S5, manufactured part blank is packed into closed pressure sintering furnace, carries out vacuum-sintering, be sintered vacuum degree 300Pa, temperature
1230 DEG C, 310 stainless steel metal parts products, density 8.2g/cm are obtained after coming out of the stove3。
Embodiment 3: a kind of 310 powder of stainless steel feeding of environment-friendly type, including 310 powder of stainless steel and forming agent, the two are pressed
The ratio of weight ratio 100:5 is prepared；The granularity of 310 powder of stainless steel is 500 mesh, tap density 4.8g/cm3；It is described
Sintered carbide ball diameter 10mm.
The forming agent includes each component of following parts by weight, half 41 parts of concise paraffin wax, cured 41 parts of white bee, polyethylene glycol
21 parts.
A method of preparing 310 powder of stainless steel feeding of environment-friendly type, comprising the following steps:
(1) 310 powder of stainless steel are poured into planet kneading machine to be kneaded in tank, adds each component of forming agent；
(2) the analysis alcohol that sintered carbide ball, 85 DEG C of pure water, concentration are greater than 90% is then sequentially added, covers and is kneaded cover
After lock；Wherein, the total weight of the sintered carbide ball of addition is the 50% of powder and forming agent total weight；It is sintered carbide ball, pure
Sintered carbide ball, the pure water of 1ml and the analysis alcohol of 1ml that water and analytically pure plastid ratio are 1: 1: 1(, that is, 1g), it is described
Sintered carbide ball diameter 10mm.
(3) open machine operation machine, revolving speed 400 turns/min, runing time 30min, after take out that be kneaded feeding in tank mixed
Close object；
(4) feeding mixture is put into electric oven, 55 DEG C of temperature, toasts 30min, it is rear to take out, it grinds.
(5) it grinds after feeding powder crosses 30 mesh stainless steel mesh, completes feeding preparation.
A kind of preparation method of 310 stainless steel metal part, comprising the following steps:
S4, selection take the mold of required product specification, are installed on pressure forming machine, and the feeding of preparation is packed into pressure forming machine
It is interior, it processes and forms manufactured part blank, 12 tons every square centimeter of manufactured part blank pressure, the dwell time 1 second, density criterion
For 5.83g/cm3；
S5, manufactured part blank is packed into closed pressure sintering furnace, carries out vacuum-sintering, be sintered vacuum degree 500Pa, temperature
1240 DEG C, 310 stainless steel metal parts products, density 8.6g/cm are obtained after coming out of the stove3。
It can also be required according to different products, carry out different grinding and polishings and the processing such as sandblast, to reach customer drawings
Technical requirements meet and use.
Claims (5)
1. a kind of 310 powder of stainless steel feeding of environment-friendly type, which is characterized in that including 310 powder of stainless steel and forming agent, the two is pressed
The ratio of weight ratio 100:2~100:5 is prepared；The granularity of 310 powder of stainless steel is 500 mesh, tap density 4.5-
4.8g/cm3。
2. 310 powder of stainless steel feeding of environment-friendly type according to claim 1, which is characterized in that the forming agent includes
The each component of following parts by weight, half concise paraffin wax 39-41 parts, white bee is 39-41 parts cured, and 19-21 parts of polyethylene glycol.
3. 310 powder of stainless steel feeding of environment-friendly type according to claim 2, which is characterized in that half 40 parts of concise paraffin wax is white
Cured 40 parts of bee, 20 parts of polyethylene glycol.
4. a kind of method for preparing 310 powder of stainless steel feeding of environment-friendly type described in claims 1 to 3 any one, feature
It is, comprising the following steps:
(1) 310 powder of stainless steel are poured into planet kneading machine to be kneaded in tank, adds each component of forming agent；
(2) the analysis alcohol that sintered carbide ball, 85 DEG C of pure water, concentration are greater than 90% is then sequentially added, covers and is kneaded cover
After lock；Wherein, the total weight of the sintered carbide ball of addition is the 30%-50% of powder and forming agent total weight；The hard
The diameter 5mm-10mm of alloying pellet；
Wherein, sintered carbide ball, pure water and analytically pure plastid ratio are 1: 1: 1；
(3) open machine operation machine, revolving speed 400 turns/min, runing time 30min, after take out be kneaded tank in feeding mixture；
(4) feeding mixture is put into electric oven, 55 DEG C of temperature, toasts 30min, it is rear to take out, it grinds；
(5) it grinds after feeding powder crosses 30 mesh stainless steel mesh, completes feeding preparation.
5. a kind of preparation method of 310 stainless steel metal parts, which comprises the following steps:
S4, selection take the mold of required product specification, are installed on pressure forming machine, and feeding prepared by claim 4 is packed into
In pressure forming machine, processing forms manufactured part blank, and manufactured part blank pressure is 9-12 tons every square centimeter, the dwell time
0.5-1 seconds, density criterion be 5.8 ±
0.03g/cm3；
S5, manufactured part blank is packed into closed pressure sintering furnace, carries out vacuum-sintering, be sintered vacuum degree 10Pa-
500Pa, obtains 310 stainless steel metal parts products, density >=7.8g/cm by 1220 DEG C~1240 DEG C of temperature after coming out of the stove3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810792375.4A CN109047750A (en) | 2018-07-18 | 2018-07-18 | The preparation method of 310 powder of stainless steel feeding of environment-friendly type and 310 powder of stainless steel components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810792375.4A CN109047750A (en) | 2018-07-18 | 2018-07-18 | The preparation method of 310 powder of stainless steel feeding of environment-friendly type and 310 powder of stainless steel components |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109047750A true CN109047750A (en) | 2018-12-21 |
Family
ID=64817240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810792375.4A Pending CN109047750A (en) | 2018-07-18 | 2018-07-18 | The preparation method of 310 powder of stainless steel feeding of environment-friendly type and 310 powder of stainless steel components |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109047750A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745640A (en) * | 2010-02-02 | 2010-06-23 | 哈尔滨工业大学 | Preparation method for metal ceramic composite special-shaped piece |
| CN102775673A (en) * | 2012-06-26 | 2012-11-14 | 北京科技大学 | Preparation and application methods of thermoplastic adhesive for powder microinjection molding |
| CN103322570A (en) * | 2012-03-23 | 2013-09-25 | 青岛注成金属有限公司 | Cutting torch and manufacturing method thereof |
| CN106270522A (en) * | 2016-09-23 | 2017-01-04 | 江西悦安超细金属有限公司 | A kind of for metal injection molded feeding and preparation method thereof |
| CN107186208A (en) * | 2017-05-23 | 2017-09-22 | 昆山卡德姆新材料科技有限公司 | A kind of high-entropy alloy feeding and its preparation method and application |
| CN107199334A (en) * | 2017-04-20 | 2017-09-26 | 东莞华晶粉末冶金有限公司 | A kind of metal powder injection molding feeding and preparation method thereof |
| CN107511484A (en) * | 2017-08-15 | 2017-12-26 | 东莞华晶粉末冶金有限公司 | A kind of stainless steel injection moulding feeding and preparation method thereof |
| CN107745117A (en) * | 2017-09-21 | 2018-03-02 | 东莞华晶粉末冶金有限公司 | 310 stainless steelwork and powder of stainless steel injection moulding feedings and preparation method |
| CN107790727A (en) * | 2017-09-21 | 2018-03-13 | 东莞华晶粉末冶金有限公司 | 440C stainless steels, 440C stainless steels injection moulding feeding and preparation method |
| CN107812933A (en) * | 2017-09-21 | 2018-03-20 | 东莞华晶粉末冶金有限公司 | 304 powder of stainless steel are injection moulded feeding and preparation method and product |
| CN107840666A (en) * | 2017-09-21 | 2018-03-27 | 东莞华晶粉末冶金有限公司 | Ceramics, ceramic injection forming feeding and preparation method |
| CN108097970A (en) * | 2017-12-28 | 2018-06-01 | 东莞华晶粉末冶金有限公司 | Metal powder injection molding feeding and preparation method thereof |
-
2018
- 2018-07-18 CN CN201810792375.4A patent/CN109047750A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745640A (en) * | 2010-02-02 | 2010-06-23 | 哈尔滨工业大学 | Preparation method for metal ceramic composite special-shaped piece |
| CN103322570A (en) * | 2012-03-23 | 2013-09-25 | 青岛注成金属有限公司 | Cutting torch and manufacturing method thereof |
| CN102775673A (en) * | 2012-06-26 | 2012-11-14 | 北京科技大学 | Preparation and application methods of thermoplastic adhesive for powder microinjection molding |
| CN106270522A (en) * | 2016-09-23 | 2017-01-04 | 江西悦安超细金属有限公司 | A kind of for metal injection molded feeding and preparation method thereof |
| CN107199334A (en) * | 2017-04-20 | 2017-09-26 | 东莞华晶粉末冶金有限公司 | A kind of metal powder injection molding feeding and preparation method thereof |
| CN107186208A (en) * | 2017-05-23 | 2017-09-22 | 昆山卡德姆新材料科技有限公司 | A kind of high-entropy alloy feeding and its preparation method and application |
| CN107511484A (en) * | 2017-08-15 | 2017-12-26 | 东莞华晶粉末冶金有限公司 | A kind of stainless steel injection moulding feeding and preparation method thereof |
| CN107745117A (en) * | 2017-09-21 | 2018-03-02 | 东莞华晶粉末冶金有限公司 | 310 stainless steelwork and powder of stainless steel injection moulding feedings and preparation method |
| CN107790727A (en) * | 2017-09-21 | 2018-03-13 | 东莞华晶粉末冶金有限公司 | 440C stainless steels, 440C stainless steels injection moulding feeding and preparation method |
| CN107812933A (en) * | 2017-09-21 | 2018-03-20 | 东莞华晶粉末冶金有限公司 | 304 powder of stainless steel are injection moulded feeding and preparation method and product |
| CN107840666A (en) * | 2017-09-21 | 2018-03-27 | 东莞华晶粉末冶金有限公司 | Ceramics, ceramic injection forming feeding and preparation method |
| CN108097970A (en) * | 2017-12-28 | 2018-06-01 | 东莞华晶粉末冶金有限公司 | Metal powder injection molding feeding and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 李笃信 等: "金属注射成形用新型聚乙二醇基粘结剂的研究", 《稀有金属材料与工程》 * |
| 李笃信 等: "金属粉末注射成形粘结剂及其研究进展", 《粉末冶金材料科学与工程》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103266271B (en) | A kind of powder metallurgy prescription and technique | |
| CN103361532B (en) | Sosoloid toughened metal ceramic and preparation method thereof | |
| CN102825259B (en) | Method for preparing TiAl inter-metallic compound powder by using titanium hydride powder | |
| CN104070168A (en) | High-wear-resistance rolling oil-retaining bearing for chain and preparation method for same | |
| CN101279367A (en) | Injection forming method for preparing high Niobium containing Ti-Al alloy components | |
| CN102312132A (en) | Method for preparing Ni-W alloy by vacuum sintering | |
| CN109047753A (en) | A kind of preparation method suitable for mobile phone center MIM stainless steel feeding and its product | |
| CN102172947B (en) | Production method for metallized wood powder matrix composite material | |
| CN106956005A (en) | A kind of stainless steel alloy material, mirror finish product and preparation method | |
| CN104451277A (en) | Chromium-aluminum alloy target and manufacturing method thereof | |
| CN101928867A (en) | Method for preparing tungsten-copper alloy based on loose-loading infiltration method | |
| CN102773483B (en) | Method for manufacturing valve seat of stop valve by powder metallurgy | |
| CN109454226A (en) | A kind of preparation method of TC11 alloy components | |
| CN102168200B (en) | Preparation method of the high-density iridium alloy billet | |
| CN101983806B (en) | Preparation method of tungsten heavy alloy thin plate | |
| CN108766754A (en) | A kind of production technology of novel neodymium iron boron | |
| CN100519054C (en) | Forging molybdenum plug and preparation method thereof | |
| CN109047750A (en) | The preparation method of 310 powder of stainless steel feeding of environment-friendly type and 310 powder of stainless steel components | |
| CN102974819A (en) | Preparation method for tin-coated copper composite powder | |
| CN101914697A (en) | Method for preparing silver-magnesium-nickel alloy billets | |
| CN103060760A (en) | Preparation method for molybdenum-titanium alloy target | |
| CN102211777A (en) | Method for preparing pure boron | |
| CN108817401B (en) | Preparation method of 1.4435 stainless steel injection molding feed and method for preparing product | |
| CN108380869A (en) | Inexpensive 310 powder of stainless steel injection moulding cerul feeding and preparation method thereof | |
| CN106001580A (en) | Technology for manufacturing lock through powder metallurgy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190807 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 Applicant before: Dongguan Jinsheng precision electronic Components Ltd |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181221 |
|
| RJ01 | Rejection of invention patent application after publication |