CN114653938A - Novel powder metallurgy manufacturing process - Google Patents
Novel powder metallurgy manufacturing process Download PDFInfo
- Publication number
- CN114653938A CN114653938A CN202111186762.1A CN202111186762A CN114653938A CN 114653938 A CN114653938 A CN 114653938A CN 202111186762 A CN202111186762 A CN 202111186762A CN 114653938 A CN114653938 A CN 114653938A
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- CN
- China
- Prior art keywords
- powder
- powder metallurgy
- meshes
- pressing
- sintering
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- 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.)
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Classifications
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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
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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
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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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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- 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
-
- 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
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a novel powder metallurgy manufacturing process, wherein a powder formula comprises the following components in percentage by mass: 50-100 meshes (10-30%) of primary reduced iron powder, 200-300 meshes (40-50%) and 500-600 meshes (3-10%); the iron content in the powder metallurgy formula is 90-98 percent; the invention adopts the iron-based material to carry out mixing proportioning, pressing and spheroidizing treatment by a spheroidizing furnace (the temperature is 1000-; the method is widely applied to basic materials for manufacturing of fitness and storage mechanical engineering. Compared with the existing casting process, the invention has the beneficial effects that: the new spheroidization process of the iron-based material has larger size than the traditional powder metallurgy product, is more widely applied, is sintered by a spheroidizing furnace in the sintering process, is more efficient and environment-friendly than the traditional industry, and saves a large amount of raw material consumption and machining cost and energy consumption compared with casting.
Description
Technical Field
The invention relates to a powder metallurgy process, in particular to a novel powder metallurgy manufacturing process.
Background
Powder metallurgy is a process technique for producing metal powder or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to produce metal materials, composite materials and various products. The powder metallurgy method has similar places with the production of ceramics and belongs to the powder sintering technology, therefore, a series of new powder metallurgy technologies can also be used for preparing ceramic materials. Due to the advantages of the powder metallurgy technology, the powder metallurgy technology becomes a key for solving the problem of new materials, and plays a significant role in the development of the new materials.
Powder metallurgy includes milling and articles. Wherein the powder making is mainly a metallurgical process and is consistent with the word. Powder metallurgy products are often far beyond the scope of materials and metallurgy, often being a technology spanning multiple disciplines (materials and metallurgy, machinery and mechanics, etc.). Especially, modern 3D printing of metal powder integrates mechanical engineering, CAD (computer aided design), reverse engineering technology, layered manufacturing technology, numerical control technology, material science and laser technology, so that the powder metallurgy product technology becomes a modern comprehensive technology spanning more subjects.
Most refractory metals can only be manufactured by a powder metallurgy method, meanwhile, the shape and the size of the refractory metals are limited to a certain extent due to the fact that the fluidity of metal powder is poorer than that of molten metal, the weight of the refractory metals cannot exceed 10 kilograms, the powder metallurgy technology can only be used for manufacturing a few relatively small and fine products, large-sized workpieces are difficult to machine, casting processes are generally adopted for machining the large-sized workpieces, however, casting structures are not compact enough, the defects of shrinkage cavities, air holes, slag, cracks and the like exist, crystal grains are uneven in thickness, the mechanical properties of the castings are low, and the impact resistance is low.
Disclosure of Invention
The invention aims to provide a novel powder metallurgy manufacturing process to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a new manufacturing process for powder metallurgy specifically comprises the following steps:
s1, product design:
s2, powder type selection:
s3, powder proportioning: mixing the powder metallurgy raw materials according to the proportion of the powder metallurgy formula, and homogenizing the mixture to obtain blank powder;
s4, pressing: putting the mixed and solidified blank powder into a pressing die, and pressing to form a blank piece according to the pressing requirement, wherein the pressing beat is 8 times/minute, the orifice density is 6.45-6.5g/cm3, and the overall density is 6.7 +/-0.05 g/cm 3;
s5, high-temperature vacuum sintering: the blank pressed and formed in the step S4 is sent into a spheroidizing furnace for sintering, the protective atmosphere of the spheroidizing furnace is nitrogen and hydrogen, the sintering temperature is 1050-;
s6, machining: according to the structural design, a turning, milling, drilling and tapping numerical control machine tool is used for machining a designed part of the semi-finished product piece obtained after sintering, and a finished product piece is obtained after machining;
s7, surface treatment: carrying out electrochemical surface treatment on the finished product;
the powder metallurgy formula comprises the following components in percentage by mass: 50-100 meshes (40-50%) of primary reduced iron powder, 200-300 meshes (40-50%) and 500-600 meshes (3-10%); the iron content in the powder metallurgy formula is 90-98%.
Compared with the prior art, the invention has the beneficial effects that:
compared with the traditional powder metallurgy product, the novel powder metallurgy process has larger size and wider application, is sintered by a spheroidizing furnace in the sintering process, is more efficient and environment-friendly than the traditional industry, and saves a large amount of raw material consumption and machining cost and energy consumption compared with casting.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A new manufacturing process for powder metallurgy specifically comprises the following steps:
s1, product design:
s2, powder selection:
s3, powder proportioning: mixing the powder metallurgy raw materials according to the proportion of the powder metallurgy formula, and homogenizing to obtain blank powder;
s4, pressing: putting the mixed and solidified blank powder into a pressing die, and pressing for 8 times/min at an orifice density of 6.45-6.5g/cm3And a bulk density of 6.7. + -. 0.05g/cm3The pressing requirement of (2) pressing and forming a blank;
s5, high-temperature vacuum sintering: the blank pressed and formed in the step S4 is sent into a spheroidizing furnace for sintering, the protective atmosphere of the spheroidizing furnace is nitrogen and hydrogen, the sintering temperature is 1050-;
s6, machining: according to the structural design, the semi-finished product piece obtained after sintering is machined to form a designed part by using a turning, milling, drilling and tapping numerical control machine tool, and a finished product piece is obtained after machining;
s7, surface treatment: carrying out electrochemical surface treatment on the finished product;
the invention adopts the iron-based material to carry out the welding and mixing material proportioning, pressing and spheroidizing by a spheroidizing furnace,
the powder metallurgy formula comprises the following components in percentage by mass: 50-100 meshes (40-50%) of primary reduced iron powder, 200-300 meshes (40-50%) and 500-600 meshes (3-10%); the iron content in the powder metallurgy formula is 90-98%.
In the description of the present invention, it should be noted that the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance. In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (2)
1. A novel powder metallurgy manufacturing process is characterized by comprising the following steps:
s1, product design:
s2, powder selection:
s3, powder proportioning: mixing the powder metallurgy raw materials according to the proportion of the powder metallurgy formula, and homogenizing to obtain blank powder;
s4, pressing: putting the mixed and solidified blank powder into a pressing die, and pressing to form a blank piece according to the pressing requirement, wherein the pressing beat is 8 times/minute, the orifice density is 6.45-6.5g/cm3, and the overall density is 6.7 +/-0.05 g/cm 3;
s5, high-temperature vacuum sintering: the blank pressed and formed in the step S4 is sent into a spheroidizing furnace for sintering, the protective atmosphere of the spheroidizing furnace is nitrogen and hydrogen, the sintering temperature is 1050-;
s6, machining: according to the structural design, the semi-finished product piece obtained after sintering is machined to form a designed part by using a turning, milling, drilling and tapping numerical control machine tool, and a finished product piece is obtained after machining;
s7, surface treatment: and carrying out electrochemical surface treatment on the finished product.
2. The novel powder metallurgy manufacturing process according to claim 1, wherein the powder metallurgy formula comprises the following components in percentage by mass: 50-100 meshes (40-50%) of primary reduced iron powder, 200-300 meshes (40-50%) and 500-600 meshes (3-10%); the iron content in the powder metallurgy formula is 90-98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111186762.1A CN114653938A (en) | 2021-10-12 | 2021-10-12 | Novel powder metallurgy manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111186762.1A CN114653938A (en) | 2021-10-12 | 2021-10-12 | Novel powder metallurgy manufacturing process |
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| CN114653938A true CN114653938A (en) | 2022-06-24 |
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| CN202111186762.1A Pending CN114653938A (en) | 2021-10-12 | 2021-10-12 | Novel powder metallurgy manufacturing process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550967A (en) * | 2014-07-28 | 2015-04-29 | 安徽华钢冶金科技有限公司 | Powder metallurgy process |
| CN105234405A (en) * | 2015-10-14 | 2016-01-13 | 东睦新材料集团股份有限公司 | Preparation method for iron-based powder metallurgy part with compact surface |
| WO2016206260A1 (en) * | 2015-06-23 | 2016-12-29 | 海安县鹰球粉末冶金有限公司 | Method for manufacturing oil-retaining bearing for petrol pump motor in powder metallurgy |
| US20200047254A1 (en) * | 2018-08-07 | 2020-02-13 | Nbtm New Materials Group Co., Ltd. | Method for Manufacturing Iron-based Powder Metallurgical Parts |
| CN113333740A (en) * | 2021-06-17 | 2021-09-03 | 德钜（厦门）特种合金制品有限公司 | Powder metallurgy formula and preparation method of high-power commercial vehicle water pump hub |
-
2021
- 2021-10-12 CN CN202111186762.1A patent/CN114653938A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550967A (en) * | 2014-07-28 | 2015-04-29 | 安徽华钢冶金科技有限公司 | Powder metallurgy process |
| WO2016206260A1 (en) * | 2015-06-23 | 2016-12-29 | 海安县鹰球粉末冶金有限公司 | Method for manufacturing oil-retaining bearing for petrol pump motor in powder metallurgy |
| CN105234405A (en) * | 2015-10-14 | 2016-01-13 | 东睦新材料集团股份有限公司 | Preparation method for iron-based powder metallurgy part with compact surface |
| US20200047254A1 (en) * | 2018-08-07 | 2020-02-13 | Nbtm New Materials Group Co., Ltd. | Method for Manufacturing Iron-based Powder Metallurgical Parts |
| CN113333740A (en) * | 2021-06-17 | 2021-09-03 | 德钜（厦门）特种合金制品有限公司 | Powder metallurgy formula and preparation method of high-power commercial vehicle water pump hub |
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