CN111318692A - Cold isostatic pressing process for efficiently producing hard alloy bars - Google Patents
Cold isostatic pressing process for efficiently producing hard alloy bars Download PDFInfo
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- CN111318692A CN111318692A CN202010297998.1A CN202010297998A CN111318692A CN 111318692 A CN111318692 A CN 111318692A CN 202010297998 A CN202010297998 A CN 202010297998A CN 111318692 A CN111318692 A CN 111318692A
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- Prior art keywords
- cold isostatic
- isostatic pressing
- pressing process
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- 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
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
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- 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
- B22F3/02—Compacting only
-
- 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
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- 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
- B22F3/24—After-treatment of workpieces or articles
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- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a cold isostatic pressing process for efficiently producing hard alloy bars, which comprises the following steps: carrying out compression molding on the mixture containing the forming agent to prepare a bar blank; machining the molded blank; putting the machined fine blank into a packaging bag for sealing, and carrying out cold isostatic pressing; and taking out the pressed compact from the packaging bag and then carrying out the subsequent sintering process. The invention can eliminate microcracks generated in the compression molding process, thereby ensuring the high quality of bar products on the premise of achieving the dimensional accuracy of the products, and the molding and machining processes adopt the automatic operation of a machine, thereby greatly improving the production efficiency while obtaining high-quality products.
Description
Technical Field
The invention relates to the technical field of powder metallurgy, in particular to a cold isostatic pressing process for efficiently producing hard alloy bars.
Background
The cold isostatic pressing process is a powder metallurgy forming king brand process, and has the greatest advantages that: the compact has good compactness and very uniform density distribution, and a high-quality product is easily obtained. Meanwhile, the defects are obvious, the production efficiency is low, and the product size precision is poor. This is especially true when it is applied to the forming of cemented carbide rods. Although the dry bag cold isostatic pressing process of bars has improved this problem in recent years, the degree of improvement is very limited.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a cold isostatic pressing process for efficiently producing hard alloy bars.
The invention provides a cold isostatic pressing process for efficiently producing hard alloy bars, which comprises the following steps:
s1: carrying out compression molding on the mixture containing the forming agent to prepare a bar blank;
s2: machining the molded blank;
s3: putting the machined fine blank into a packaging bag for sealing, and carrying out cold isostatic pressing;
s4: and taking out the pressed compact from the packaging bag and then carrying out the subsequent sintering process.
Preferably, in S1, the pressing method is transverse pressing, and the pressing pressure is controlled within a proper range.
Preferably, the molding pressure in S3 is higher than the molding pressure in S1.
Preferably, in S1, the forming agent is a paraffin wax forming agent.
Preferably, the sintering is performed in a vacuum sintering furnace or a pressure sintering furnace.
Preferably, the molding and machining is automated by machine.
The beneficial effects of the invention are as follows:
1. the high efficiency and high precision of the mould pressing process and the high quality of the cold isostatic pressing process are achieved.
2. The high efficiency and the high accuracy of size of rod production have been realized through the mould pressing technology, and further cold isostatic pressing shaping of rethread makes the density of rod pressed compact can realize more even distribution, can eliminate at the produced microcrack of compression molding in-process to ensured the high quality of rod product, mould pressing and machining process can also use the automatic mode operation of machine, will obtain the high quality product simultaneously, greatly promoted production efficiency.
Drawings
Fig. 1 is a schematic flow chart of a cold isostatic pressing process for efficiently producing a hard alloy bar according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a cold isostatic pressing process for efficiently producing a cemented carbide bar includes the following steps:
s1: carrying out compression molding on the mixture containing the forming agent to prepare a bar blank;
s2: machining the die pressing rough blank to eliminate ribs inevitably generated in the transverse pressing process;
s3: putting the machined fine blank into a packaging bag for sealing, and carrying out cold isostatic pressing;
s4: and taking out the pressed compact from the packaging bag and then carrying out the subsequent sintering process.
In the invention, in S1, a transverse pressing mode is adopted, the pressing pressure is controlled within a proper range, the forming pressure in S3 is higher than the compression molding pressure in S1, in S1, the forming agent is paraffin wax forming agent, sintering is carried out in a vacuum sintering furnace or a pressure sintering furnace, and machine automation is adopted for pressing and machining.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A cold isostatic pressing process for efficiently producing hard alloy bars is characterized by comprising the following steps:
s1: carrying out compression molding on the mixture containing the forming agent to prepare a bar blank;
s2: machining the molded blank;
s3: putting the machined fine blank into a packaging bag for sealing, and carrying out cold isostatic pressing;
s4: and taking out the pressed compact from the packaging bag and then carrying out the subsequent sintering process.
2. The cold isostatic pressing process for producing cemented carbide rods with high efficiency as claimed in claim 1, wherein in S1, transverse pressing is used and the pressing pressure is controlled within a proper range.
3. The cold isostatic pressing process for high efficiency production of cemented carbide rods as claimed in claim 1, wherein the forming pressure in S3 is higher than the forming pressure in S1.
4. The cold isostatic pressing process for efficiently producing a cemented carbide bar as claimed in claim 1, wherein in S1, the forming agent is paraffin wax.
5. A cold isostatic pressing process for high efficiency production of cemented carbide rods according to claim 1, wherein said sintering is performed in a vacuum sintering furnace or a pressure sintering furnace.
6. A cold isostatic pressing process for the efficient production of cemented carbide rods according to claim 1, wherein the pressing and machining is performed in a robotic automation mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010297998.1A CN111318692A (en) | 2020-04-16 | 2020-04-16 | Cold isostatic pressing process for efficiently producing hard alloy bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010297998.1A CN111318692A (en) | 2020-04-16 | 2020-04-16 | Cold isostatic pressing process for efficiently producing hard alloy bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111318692A true CN111318692A (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010297998.1A Pending CN111318692A (en) | 2020-04-16 | 2020-04-16 | Cold isostatic pressing process for efficiently producing hard alloy bars |
Country Status (1)
| Country | Link |
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| CN (1) | CN111318692A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114043763A (en) * | 2021-09-17 | 2022-02-15 | 大同新成新材料股份有限公司 | Forming method of isostatic pressing small graphite block |
| CN114985734A (en) * | 2022-06-29 | 2022-09-02 | 苏州新锐合金工具股份有限公司 | Powder isostatic compaction method |
| CN115502398A (en) * | 2022-10-27 | 2022-12-23 | 株洲硬质合金集团有限公司 | Production method of hard alloy super-long thin plate |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003268479A (en) * | 2002-03-18 | 2003-09-25 | National Institute Of Advanced Industrial & Technology | Hard metal and manufacturing method therefor |
| CN102350269A (en) * | 2011-09-26 | 2012-02-15 | 株洲硬质合金集团有限公司 | Hard alloy anvil used for compounding diamond compound sheet and preparation method thereof |
| CN103834823A (en) * | 2013-12-16 | 2014-06-04 | 安泰科技股份有限公司 | Preparation method for cemented carbide product |
| CN103920880A (en) * | 2014-03-11 | 2014-07-16 | 宁夏东方钽业股份有限公司 | Production method for tantalum and tantalum alloy bars |
| CN107433329A (en) * | 2017-07-25 | 2017-12-05 | 厦门曦华新材料科技有限公司 | Carbide twist drill bit straight forming method |
| CN107553067A (en) * | 2017-08-18 | 2018-01-09 | 武汉新锐合金工具有限公司 | A kind of preparation method of large-size ultra-thin hard alloy substrate |
| CN109396451A (en) * | 2018-12-20 | 2019-03-01 | 赣州海盛硬质合金有限公司 | A kind of production technology of machining hard alloy bar |
| CN110052599A (en) * | 2019-04-26 | 2019-07-26 | 四川一然新材料科技有限公司 | A kind of 108 or more low density rigid alloying pellet of diameter and preparation method thereof |
| CN110814338A (en) * | 2019-12-02 | 2020-02-21 | 株洲硬质合金集团有限公司 | Preparation method of large hard alloy wear-resistant block with complex shape |
-
2020
- 2020-04-16 CN CN202010297998.1A patent/CN111318692A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003268479A (en) * | 2002-03-18 | 2003-09-25 | National Institute Of Advanced Industrial & Technology | Hard metal and manufacturing method therefor |
| CN102350269A (en) * | 2011-09-26 | 2012-02-15 | 株洲硬质合金集团有限公司 | Hard alloy anvil used for compounding diamond compound sheet and preparation method thereof |
| CN103834823A (en) * | 2013-12-16 | 2014-06-04 | 安泰科技股份有限公司 | Preparation method for cemented carbide product |
| CN103920880A (en) * | 2014-03-11 | 2014-07-16 | 宁夏东方钽业股份有限公司 | Production method for tantalum and tantalum alloy bars |
| CN107433329A (en) * | 2017-07-25 | 2017-12-05 | 厦门曦华新材料科技有限公司 | Carbide twist drill bit straight forming method |
| CN107553067A (en) * | 2017-08-18 | 2018-01-09 | 武汉新锐合金工具有限公司 | A kind of preparation method of large-size ultra-thin hard alloy substrate |
| CN109396451A (en) * | 2018-12-20 | 2019-03-01 | 赣州海盛硬质合金有限公司 | A kind of production technology of machining hard alloy bar |
| CN110052599A (en) * | 2019-04-26 | 2019-07-26 | 四川一然新材料科技有限公司 | A kind of 108 or more low density rigid alloying pellet of diameter and preparation method thereof |
| CN110814338A (en) * | 2019-12-02 | 2020-02-21 | 株洲硬质合金集团有限公司 | Preparation method of large hard alloy wear-resistant block with complex shape |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114043763A (en) * | 2021-09-17 | 2022-02-15 | 大同新成新材料股份有限公司 | Forming method of isostatic pressing small graphite block |
| CN114985734A (en) * | 2022-06-29 | 2022-09-02 | 苏州新锐合金工具股份有限公司 | Powder isostatic compaction method |
| CN115502398A (en) * | 2022-10-27 | 2022-12-23 | 株洲硬质合金集团有限公司 | Production method of hard alloy super-long thin plate |
| CN115502398B (en) * | 2022-10-27 | 2024-03-12 | 株洲硬质合金集团有限公司 | Production method of hard alloy ultra-long thin plate |
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