CN112404430A - Production process of sports fitness equipment counter weight - Google Patents
Production process of sports fitness equipment counter weight Download PDFInfo
- Publication number
- CN112404430A CN112404430A CN202011286432.5A CN202011286432A CN112404430A CN 112404430 A CN112404430 A CN 112404430A CN 202011286432 A CN202011286432 A CN 202011286432A CN 112404430 A CN112404430 A CN 112404430A
- Authority
- CN
- China
- Prior art keywords
- iron powder
- powder
- reduced iron
- blank
- sintering
- 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.)
- Withdrawn
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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- 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
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/006—Making ferrous alloys compositions used for making ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0207—Using a mixture of prealloyed powders or a master alloy
Abstract
The invention relates to a production process of a sports fitness equipment counterweight, which comprises the following steps of 1) preparing raw materials: the iron powder is 95-97% of the total weight, and the binder is 3-5% of the total weight; 2) mixing materials: stirring the proportioned iron powder and the binder by a stirrer for 30-45 minutes at 80 ℃; 3) pressing: the mixed raw materials are conveyed into a powder press, and a product blank of the sports fitness equipment counterweight is formed by one-time extrusion; 4) sintering and cooling: conveying the blank into a sintering furnace through a conveyor belt for sintering, and cooling after sintering and forming; 5) and (3) post-treatment: and (3) carrying out one or a combination of subsequent electroplating, paint spraying, encapsulation, plastic dipping and TPU or CPU surface post-treatment processing on the sintered blank to obtain a finished product. The design is ingenious, the process is complete, and the product quality meets the market demand.
Description
Technical Field
The invention relates to the field of processing of sports fitness equipment, in particular to a production process of a counterweight of the sports fitness equipment.
Background
In the prior art, the balance weights (barbells, common dumbbells, flat-head hexagonal dumbbells, dumbbell pieces and the like) of the physical fitness equipment are spherical, columnar, flaky and other physical fitness equipment, and during production and manufacture, iron is adopted for casting molding, and then post-treatment processing and other operations are carried out, so that the mode has the advantages of multiple production procedures, complexity and high cost; at present, iron powder is also formed by processing through a powder metallurgy technology, but the process is not complete enough, the quality of the produced product cannot meet the market demand, and the product quality is not firm.
Disclosure of Invention
In order to solve the technical problems, the invention provides a production process of a sports fitness equipment counterweight, which has the advantages of ingenious design and perfect process, and the product quality meets the market demand.
The technical scheme of the invention is as follows:
a production process of a sports fitness equipment counterweight comprises the following steps:
1) preparing raw materials: the iron powder comprises 95-97% of the total weight of the iron powder and 3-5% of the binder.
2) Mixing materials: and stirring the proportioned iron powder and the binder by a stirrer for 30-45 minutes at 80 ℃.
3) Pressing: the mixed raw materials are conveyed into a powder press, and a product blank of the sports fitness equipment counterweight is formed by one-time extrusion.
4) Sintering and cooling: and (3) conveying the blank into a sintering furnace through a conveyor belt for sintering, and cooling after sintering and forming.
5) And (3) post-treatment: and (3) carrying out one or a combination of subsequent electroplating, paint spraying, encapsulation, plastic dipping and TPU or CPU surface post-treatment processing on the sintered blank to obtain a finished product.
The reduced iron powder is primary reduced iron powder or secondary reduced iron powder; when the primary reduced iron powder is adopted, the weight ratio of the iron powder to the total weight is 95 percent, and the weight ratio of the binder to the total weight is 5 percent; when the secondary reduced iron powder is adopted, the weight ratio of the iron powder to the total weight is 97 percent, and the weight ratio of the binder to the total weight is 3 percent.
The content of pure iron powder in the primary reduced iron powder is 95 percent, and the content of non-metal powder in the primary reduced iron powder is 5 percent; the content of pure iron powder in the secondary reduced iron powder is 97%, and the content of non-metal powder in the secondary reduced iron powder is 3%.
The sintering and cooling are carried out by a chain conveyor belt passing through a sintering furnace and then cooling, the sintering furnace is divided into five heating stages, the first stage is for heating 300 ℃, the second stage is for heating 800 ℃, the third stage is for heating 1050 ℃, the fourth stage is for heating 800 ℃, the fifth stage is for heating 300 ℃, and finally the sintering furnace enters a cooling tower designed at the outlet of the sintering furnace, and the cooling temperature in the cooling tower is 30-50 ℃.
The time distribution of the five heating stages in the sintering furnace is the average distribution; time of blank: 1-10kg of blank, and the heating time is 1.5 hours; 10-50kg of blank, and the heating time is 2 hours; 50-100kg of blank, and the heating time is 2.5 hours.
The binder is a nano binder.
The iron powder processing technology comprises the following steps:
1) selecting materials, namely the waste slag of the bread iron, the solid carbon and the limestone.
2) Pre-treating, namely sequentially carrying out primary screening, cleaning, drying, crushing and magnetic separation processing on fine iron powder; sequentially crushing, sieving and drying the solid carbon, wherein the size of a sieve pore is 4-8 m; limestone is processed by crushing, sieving and drying in sequence, and the size of a sieve pore is 2 m.
3) After mixing, the materials are sent into a reduction furnace for reduction reaction, and primary reduced iron powder with the particle size of 80-100 meshes is obtained after reduction is finished.
4) Cleaning, coarse crushing, fine crushing and magnetic separation are carried out on the primary reduced iron powder, and then secondary reduction is carried out through a reduction furnace.
5) And (4) performing fine crushing, magnetic separation and self-mixing on the product after the secondary reduction to obtain secondary reduced iron powder with the particle size of 120 meshes.
The electroplating process in the post-treatment aims at the products formed by processing the secondary reduced iron powder.
The powder press is a 1500-2000 ton powder press. Whether the pressing die structure has the data supplement description or not;
the non-metal powder is silicon dioxide powder.
The invention has the advantages of ingenious design, perfect process, high product quality meeting the market demand, high product hardness and impact resistance by adopting the secondary reduced iron powder in the electroplating process.
Detailed Description
Example 1
A production process of a sports fitness equipment counterweight comprises the following steps:
1) preparing raw materials: when the primary reduced iron powder is adopted, the weight ratio of the iron powder to the total weight is 95 percent, and the weight ratio of the binder to the total weight is 5 percent; the content of pure iron powder in the primary reduced iron powder is 95 percent, and the content of non-metal powder in the primary reduced iron powder is 5 percent; the binder is a nano binder; the non-metal powder is silicon dioxide powder; the iron powder processing technology comprises the steps of selecting materials, bread iron waste residues, solid carbon and limestone, pretreating, and sequentially carrying out primary screening, cleaning, drying, crushing and magnetic separation processing on fine iron powder; sequentially crushing, sieving and drying the solid carbon, wherein the size of a sieve pore is 4-8 m; sequentially crushing, sieving and drying limestone, wherein the size of a sieve pore is 2 m; after mixing, the materials are sent into a reduction furnace for reduction reaction, and primary reduced iron powder with the particle size of 80-100 meshes is obtained after reduction is finished.
2) Mixing materials: and stirring the proportioned iron powder and the binder by a stirrer for 30-45 minutes at 80 ℃.
3) Pressing: the mixed raw materials are conveyed into a powder press, and a product blank of the sports fitness equipment counterweight is formed by one-time extrusion; the powder press is a 1500-2000 ton powder press.
4) Sintering and cooling: conveying the blank into a sintering furnace through a conveyor belt for sintering, and cooling after sintering and forming; the sintering and cooling are carried out by a chain conveyor belt passing through a sintering furnace and then cooling, the sintering furnace is divided into five heating stages, the first stage is for heating 300 ℃, the second stage is for heating 800 ℃, the third stage is for heating 1050 ℃, the fourth stage is for heating 800 ℃, the fifth stage is for heating 300 ℃, and finally the sintering furnace enters a cooling tower designed at the outlet of the sintering furnace, and the cooling temperature in the cooling tower is 30-50 ℃.
The time distribution of the five heating stages in the sintering furnace is the average distribution; time of blank: 1-10kg of blank, and the heating time is 1.5 hours; 10-50kg of blank, and the heating time is 2 hours; 50-100kg of blank, and the heating time is 2.5 hours.
5) And (3) post-treatment: and (3) performing one or more combination of subsequent paint spraying, encapsulation, plastic dipping and TPU or CPU surface post-treatment processing on the sintered blank to obtain a finished product.
After the product of the primary reduced iron powder is subjected to the subsequent processing treatment, the market demand is met, the processes are few, the cost is low, the product is resistant to falling, and the hardness is high.
Example 2
A production process of a sports fitness equipment counterweight comprises the following steps:
1) preparing raw materials: when the secondary reduced iron powder is adopted, the weight ratio of the iron powder to the total weight is 97 percent, and the weight ratio of the binder to the total weight is 3 percent. The content of pure iron powder in the secondary reduced iron powder is 97%, and the content of non-metal powder in the secondary reduced iron powder is 3%. The binder is a nano binder; the non-metal powder is silicon dioxide powder; the iron powder processing technology comprises the steps of selecting materials, namely, the waste ferric bread slag, solid carbon and limestone; pre-treating, namely sequentially carrying out primary screening, cleaning, drying, crushing and magnetic separation processing on fine iron powder; sequentially crushing, sieving and drying the solid carbon, wherein the size of a sieve pore is 4-8 m; sequentially crushing, sieving and drying limestone, wherein the size of a sieve pore is 2 m; after mixing, feeding the materials into a reduction furnace for reduction reaction to obtain primary reduced iron powder with the particle size of 80-100 meshes after reduction; cleaning, coarse crushing, fine crushing and magnetic separation are carried out on the primary reduced iron powder, then secondary reduction is carried out on the primary reduced iron powder through a reduction furnace, and fine crushing, magnetic separation and self-mixing are carried out on the secondary reduced iron powder to obtain secondary reduced iron powder with the particle size of 120 meshes.
2) Mixing materials: and stirring the proportioned iron powder and the binder by a stirrer for 30-45 minutes at 80 ℃.
3) Pressing: the mixed raw materials are conveyed into a powder press, and a product blank of the sports fitness equipment counterweight is formed by one-time extrusion; the powder press is a 1500-2000 ton powder press.
4) Sintering and cooling: conveying the blank into a sintering furnace through a conveyor belt for sintering, and cooling after sintering and forming; the sintering and cooling are carried out by a chain conveyor belt passing through a sintering furnace and then cooling, the sintering furnace is divided into five heating stages, the first stage is for heating 300 ℃, the second stage is for heating 800 ℃, the third stage is for heating 1050 ℃, the fourth stage is for heating 800 ℃, the fifth stage is for heating 300 ℃, and finally the sintering furnace enters a cooling tower designed at the outlet of the sintering furnace, and the cooling temperature in the cooling tower is 30-50 ℃.
The time distribution of the five heating stages in the sintering furnace is the average distribution; time of blank: 1-10kg of blank, and the heating time is 1.5 hours; 10-50kg of blank, and the heating time is 2 hours; 50-100kg of blank, and the heating time is 2.5 hours.
5) And (3) post-treatment: and (3) performing one or more combination of subsequent paint spraying, encapsulation, plastic dipping and TPU or CPU surface post-treatment processing on the sintered blank to obtain a finished product.
The electroplating process in the post-treatment aims at the products formed by processing the secondary reduced iron powder. The sintered product prepared by rough preparation of the primary reduced iron powder particles is easy to have air holes, so that the primary reduced iron powder is not enough in hardness and not resistant to falling when used for electroplating the product, but the secondary reduced iron powder particles are fine and smooth, so that the product is not suitable for generating air holes, and the product prepared by the electroplating process is high in hardness, impact-resistant and not easy to break.
The product performance index is tested for 5 ten thousand times by adopting a 3-meter free falling body, and the product has no crack; the product has the surface hardness of 6H, is nontoxic, and has the density of 6.8-7.1kg/cm3And the market demand is met.
The product is non-toxic, and the specific chemical components are as follows:
Claims (10)
1. a production process of a sports fitness equipment counter weight, which is characterized in that,
1) preparing raw materials: the iron powder is 95-97% of the total weight, and the binder is 3-5% of the total weight;
2) mixing materials: stirring the proportioned iron powder and the binder by a stirrer for 30-45 minutes at 80 ℃;
3) pressing: the mixed raw materials are conveyed into a powder press, and a product blank of the sports fitness equipment counterweight is formed by one-time extrusion;
4) sintering and cooling: conveying the blank into a sintering furnace through a conveyor belt for sintering, and cooling after sintering and forming;
5) and (3) post-treatment: and (3) carrying out one or a combination of subsequent electroplating, paint spraying, encapsulation, plastic dipping and TPU or CPU surface post-treatment processing on the sintered blank to obtain a finished product.
2. A process for manufacturing a sports fitness apparatus weight according to claim 1, wherein the fine reduced iron is a primary fine reduced iron or a secondary fine reduced iron; when the primary reduced iron powder is adopted, the weight ratio of the iron powder to the total weight is 95 percent, and the weight ratio of the binder to the total weight is 5 percent; when the secondary reduced iron powder is adopted, the weight ratio of the iron powder to the total weight is 97 percent, and the weight ratio of the binder to the total weight is 3 percent.
3. A process for manufacturing a sports fitness equipment weight according to claim 2, wherein the primary reduced iron powder contains 95% pure iron powder and 5% non-metal powder; the content of pure iron powder in the secondary reduced iron powder is 97%, and the content of non-metal powder in the secondary reduced iron powder is 3%.
4. A process for manufacturing a counterweight for sports fitness equipment according to claim 1, wherein the sintering and cooling are performed by passing a chain conveyor through a sintering furnace and cooling, the sintering furnace is divided into five heating stages, wherein the first stage is heating to 300 ℃, the second stage is heating to 800 ℃, the third stage is heating to 1050 ℃, the fourth stage is heating to 800 ℃, the fifth stage is heating to 300 ℃, and finally the sintering furnace is cooled to a cooling tower at an outlet of the sintering furnace, and the cooling temperature in the cooling tower is 30-50 ℃.
5. A process for manufacturing a sports fitness device weight according to claim 4, wherein the distribution of the time of the five heating stages in the sintering furnace is an average distribution; time of blank: 1-10kg of blank, and the heating time is 1.5 hours; 10-50kg of blank, and the heating time is 2 hours; 50-100kg of blank, and the heating time is 2.5 hours.
6. A process for manufacturing a sports fitness device weight according to claim 1, wherein the binder is a nano binder.
7. A process for manufacturing a sports fitness equipment weight according to claim 1, wherein the iron powder processing is,
1) selecting materials, namely, the waste slag of the bread iron, the solid carbon and the limestone;
2) pre-treating, namely sequentially carrying out primary screening, cleaning, drying, crushing and magnetic separation processing on fine iron powder; sequentially crushing, sieving and drying the solid carbon, wherein the size of a sieve pore is 4-8 m; sequentially crushing, sieving and drying limestone, wherein the size of a sieve pore is 2 m;
3) after mixing, feeding the materials into a reduction furnace for reduction reaction to obtain primary reduced iron powder with the particle size of 80-100 meshes after reduction;
4) cleaning, coarse crushing, fine crushing and magnetic separation are carried out on the primary reduced iron powder, then secondary reduction is carried out through a reduction furnace,
5) and (4) performing fine crushing, magnetic separation and self-mixing on the product after the secondary reduction to obtain secondary reduced iron powder with the particle size of 120 meshes.
8. A process for manufacturing a sports fitness equipment weight according to claim 2, wherein the post-treatment electroplating process is applied to a product formed by processing secondary reduced iron powder.
9. A process for the production of a sports fitness machine weight according to claim 1, wherein the powder press is a 1500 ton to 2000 ton powder press.
10. A process for manufacturing a sports fitness machine weight according to claim 3, wherein the non-metallic powder is silica powder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011286432.5A CN112404430A (en) | 2020-11-17 | 2020-11-17 | Production process of sports fitness equipment counter weight |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011286432.5A CN112404430A (en) | 2020-11-17 | 2020-11-17 | Production process of sports fitness equipment counter weight |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112404430A true CN112404430A (en) | 2021-02-26 |
Family
ID=74832141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011286432.5A Withdrawn CN112404430A (en) | 2020-11-17 | 2020-11-17 | Production process of sports fitness equipment counter weight |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112404430A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117505859A (en) * | 2024-01-05 | 2024-02-06 | 南通英诺威体育用品科技有限公司 | Production process for preparing body-building equipment iron block by using waste metal materials |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1157081A (en) * | 1997-08-28 | 1999-03-02 | Maruman Golf Corp | Golf club head and its manufacture |
CN2458014Y (en) * | 2000-12-28 | 2001-11-07 | 王来全 | Ring dumb-bell |
US20020144571A1 (en) * | 2000-07-19 | 2002-10-10 | Ra Brands, L.L.C. | Preparation of articles using metal injection molding |
CN101176917A (en) * | 2007-11-30 | 2008-05-14 | 华南理工大学 | Method for shaping low temperature fluxion temperature pressure |
CN102189256A (en) * | 2011-04-11 | 2011-09-21 | 恒润国际贸易(天津)有限公司 | Process for manufacturing dumbbell and barbell products |
CN102397667A (en) * | 2010-09-13 | 2012-04-04 | 南通铁人运动用品有限公司 | Hand-held type weight plate |
CN103042223A (en) * | 2012-12-21 | 2013-04-17 | 宁夏众磊鑫科技实业有限公司 | Reduced iron powder production process |
CN107008914A (en) * | 2017-04-06 | 2017-08-04 | 安徽工业大学 | It is a kind of to improve the reduced iron powder production technology of reduced iron powder performance |
CN107151757A (en) * | 2017-03-27 | 2017-09-12 | 刘金财 | A kind of preparation method of high-performance Fe-based powder metallurgy agglomerated material |
-
2020
- 2020-11-17 CN CN202011286432.5A patent/CN112404430A/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1157081A (en) * | 1997-08-28 | 1999-03-02 | Maruman Golf Corp | Golf club head and its manufacture |
US20020144571A1 (en) * | 2000-07-19 | 2002-10-10 | Ra Brands, L.L.C. | Preparation of articles using metal injection molding |
CN2458014Y (en) * | 2000-12-28 | 2001-11-07 | 王来全 | Ring dumb-bell |
CN101176917A (en) * | 2007-11-30 | 2008-05-14 | 华南理工大学 | Method for shaping low temperature fluxion temperature pressure |
CN102397667A (en) * | 2010-09-13 | 2012-04-04 | 南通铁人运动用品有限公司 | Hand-held type weight plate |
CN102189256A (en) * | 2011-04-11 | 2011-09-21 | 恒润国际贸易(天津)有限公司 | Process for manufacturing dumbbell and barbell products |
CN103042223A (en) * | 2012-12-21 | 2013-04-17 | 宁夏众磊鑫科技实业有限公司 | Reduced iron powder production process |
CN107151757A (en) * | 2017-03-27 | 2017-09-12 | 刘金财 | A kind of preparation method of high-performance Fe-based powder metallurgy agglomerated material |
CN107008914A (en) * | 2017-04-06 | 2017-08-04 | 安徽工业大学 | It is a kind of to improve the reduced iron powder production technology of reduced iron powder performance |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117505859A (en) * | 2024-01-05 | 2024-02-06 | 南通英诺威体育用品科技有限公司 | Production process for preparing body-building equipment iron block by using waste metal materials |
CN117505859B (en) * | 2024-01-05 | 2024-03-08 | 南通英诺威体育用品科技有限公司 | Production process for preparing body-building equipment iron block by using waste metal materials |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104028765B (en) | A kind of production method of the metallic sintered products with installation through hole | |
CN104070160B (en) | A kind of powder metallurgy duplicate gear and preparation method thereof | |
US11911826B2 (en) | Preparation of titanium and titanium alloy powder for 3D printing based on fluidized bed jet milling technique | |
CN109261980B (en) | Preparation method of tungsten powder for high-density alloy | |
CN112404430A (en) | Production process of sports fitness equipment counter weight | |
CN106987672A (en) | The method that low-grade vanadium titano-magnetite powder produces natural micro alloy reduced iron powder | |
CN106675010A (en) | Nylon resin powder for selective laser sintering, and preparation method thereof | |
CN110369730A (en) | A kind of copper-clad iron powder and preparation method thereof | |
CN110961619A (en) | Low-cost 3D printing method for titanium product | |
CN105200322A (en) | High-strength automobile part powder metallurgy component and preparation method thereof | |
CN103586459B (en) | A kind of high rigidity super abrasive Powder metallurgy tool and preparation method thereof | |
CN102776364A (en) | Process for recovering titanium and iron from titanomagnetite tailings | |
CN108637264B (en) | Ball mill, method for improving flowability of metal powder for 3D printing and metal powder for 3D printing | |
CN104328366A (en) | Iron-based composite material and preparation method thereof | |
CN110508800B (en) | Pre-alloy powder used for composite binder grinding tool for grinding hard and brittle materials, preparation method of pre-alloy powder and grinding tool | |
CN106041105A (en) | High-strength cobalt-tantalum-molybdenum alloy medical 3D-printing metal powder and preparation method thereof | |
CN1363706A (en) | Technology for making enhanced Al-base composition by spraying and codepositing crystalloid particles | |
CN107142415A (en) | A kind of composite powder metallurgy material and its method for manufacturing motorcycle balancing driven tooth wheel disc | |
CN111014657A (en) | FeCuNiSn alloy powder for diamond product and preparation method thereof | |
CN105645473A (en) | Preparation system and method for blue tungsten with fine particles | |
CN205575672U (en) | Preparation system of blue tungsten of thin granule | |
CN107266905A (en) | A kind of 3D printing PA12/PA6 alloy material powder | |
CN109513915A (en) | A kind of production method of metallic sintered products and the metallic sintered products with installation through-hole | |
CA1088277A (en) | Pellet-rolling method | |
CN102672181A (en) | Production process of powder metallurgy products |
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 | ||
WW01 | Invention patent application withdrawn after publication | ||
WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210226 |