CN108568526A - A kind of preparation method of large scale material - Google Patents
A kind of preparation method of large scale material Download PDFInfo
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- CN108568526A CN108568526A CN201810389986.4A CN201810389986A CN108568526A CN 108568526 A CN108568526 A CN 108568526A CN 201810389986 A CN201810389986 A CN 201810389986A CN 108568526 A CN108568526 A CN 108568526A
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- blank
- large scale
- fritter
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- scale material
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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
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
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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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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a kind of preparation method of large scale material, the present invention improves moulding process, first suppresses a lower height of blank fritter on the basis of prior powder metallurgy technique（1）, then by multiple blank fritters（1）It is assembled into required area and forms the combination of blank fritter（2）, then by multiple blank fritters combine（2）Superposition carries out isostatic pressed, forms blank（3）, when sintering feeds vertically by Direction of superposition, passes through high temperature sintering, blank fritter（1）Between be melted together admittedly completely, post-processing abrade surface blank fritter（1）Between trace, need size and shape after being processed into；The present invention can prepare the material that axial dimension reaches 1000mm, and of less demanding to press pressure, cost-effective, reduce the density gradient that one-pass molding is brought, make sintered material not flexible type, meet application requirement.
Description
Technical field
The present invention relates to powder metallurgical technique preparing technical field more particularly to a kind of preparation methods of large scale material.
Background technology
Now with motor, the development of wireless charging technology and the active demand of shielding techniques, need to prepare 100mm
Above large scale material.The preparation method of material is by powder metallurgical technique, and powder metallurgical technique is art technology
Preparation method known to personnel, including powder processed, molding, isostatic pressed, sintering, post-processing step, wherein the molding pressure of moulding process
Power becomes larger with the forced area and becoming larger for height of material, to prepare the bigger material of size, is needed to press-molding pressure
It is higher, and the press that briquetting pressure is bigger, price are more expensive, manufacturing cost is higher, to prepare height as the rare-earth cobalt permanent magnet of 400mm
For material, traditional method needs the material that the press of 1000T or more is suppressed, and formed out, and there are density gradient, height
Density among the density ratio at direction both ends is big by 5% or more, and when sintering is also easy to produce big at both ends and small in middle, cannot be satisfied application requirement.
Invention content
The purpose of the present invention, which is that, provides a kind of preparation method of large scale material, to solve the above problems.
To achieve the goals above, the technical solution adopted by the present invention is such：A kind of preparation method of large scale material,
Process includes powder processed, molding, isostatic pressed, sintering and post-processing, and the molding procedure uses multistage forming method, specifically,
Powder is shaped to the blank fritter that height is relatively low, area is smaller first, multiple blank fritters are then assembled into blank
Fritter combines, then multiple blank fritters are combined and are superimposed, and reaches required height, forms blank；
It feeds vertically along blank fritter combination Direction of superposition when sintering circuit feeds, blank fritter is combined and is packed into high temperature sintering
Stove passes through high temperature sintering, blank fritter（Between be melted together admittedly completely, formed an entirety；
Trace is to get to large scale material between post-processing process abrades the combination of surface blank fritter.
The blank carries out isostatic pressed before being packed into high temperature sintering furnace as a preferred technical solution,.
The material is ferrite as a preferred technical solution,.
The material is metal alloy compositions as a preferred technical solution,.
When sintering circuit feeds as a preferred technical solution, one layer of high temperature resistant is spread between the bottom and load bearing board
Grain.High-temperature resistant particle includes but not limited to alumina powder, zirconia powder etc., it is therefore an objective to the blank fritter being bolted together be made to combine
It can be slided between load bearing board when being sintered volume contraction, to make the blank fritter combination of isostatic pressed together be not easy
It can hold.
As further preferred technical solution, the high-temperature resistant particle is zirconium particle.
The blank fritter sectional area is 400mm as a preferred technical solution,2-10000mm2, it is highly 10mm-
80mm, blank fritter compound section product are 400 mm2-40000mm2, it is highly 10mm-80mm, the blank sectional area is
400 mm2-40000mm2, it is highly 100mm-1000mm.
As further preferred technical solution, the hydrostatic pressure is 100MPa-1000MPa.
The large scale material is cuboid as a preferred technical solution, and the blank fritter combination is by 2-4 block hairs
Base fritter is assembled.
The large scale material is cylinder as a preferred technical solution, and the blank fritter combination is by 2 blocks of blanks
Fritter is assembled.
The large scale material is annulus as a preferred technical solution, and the blank fritter combination is by 2-8 block blanks
Fritter is assembled.
Compared with the prior art, the advantages of the present invention are as follows：The present invention can prepare the material that size reaches 1000mm, and right
Press pressure requires to reduce by 60% or more, cost-effective, the density of the material different location of preparation can control 1% with
It is interior, reduce the density gradient that one-pass molding is brought, so that sintered material is unlikely to deform, meet application requirement.
Description of the drawings
Fig. 1 is the quadrangle bulk material preparation process schematic diagram of embodiment 1；
Fig. 2 is 2 cylindrical block material preparation process schematic of embodiment
Fig. 3 is 3 circular ring shape bulk material preparation process schematic diagram of embodiment
In figure：1, blank fritter；2, blank fritter combines；3, blank；4, large scale material.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings.
Embodiment 1：
The present embodiment is the blocky samarium-cobalt permanent-magnetic material for preparing long 200mm, width 100mm, high 100mm；
With conventional method, prepare the material and the press of 1000T or more needed to suppress, and because of excessive height, the density at both ends with
Intermediate density contrast is 5% or so, forms density gradient, and when sintering is yielding, cannot meet the needs；
The present embodiment is as shown in Figure 1, its process prepared is：
The blank fritter 1 for suppressing long 100mm, wide 100mm, high 20mm with the press of 50T first, two blank fritters 1 are spliced
A long 200mm, wide 100mm, high 20mm blanks fritter combination 2 are formed together, then 5 blank fritters are combined 2 and are superimposed upon
Together（Four are only shown in Fig. 1）, a monoblock blank 3 is formed, by the plastic bag sealing of blank 3, carried out under 200Pa pressure etc.
Static pressure makes multiple blank fritters 1 combine closely, is not easy to disperse, and by isostatic pressed, 3 even density of blank, and when sintering is not variable
Shape；According to feeding vertically shown in Fig. 1 when sintering, one layer of high-temperature resistant particle zirconium oxide is spread between the bottom and load bearing board, makes assembly
Blank fritter combination 2 together can be slided when being sintered volume contraction on load bearing board, and make isostatic pressed together
Blank fritter combination 2 be not easy separate, by high temperature sintering, be melted together admittedly completely between blank fritter 1, formed one it is whole
Body；Trace between removing surface blank fritter 1, is reprocessed into required size and shape, i.e. large scale material 4 when post-processing；
Maximal density difference by testing 4 different parts of large scale material that the present embodiment obtains is 0.7%.
Embodiment 2：
The present embodiment prepares the cylindrical manganese-zinc ferrite core of φ 200mm, high 200mm；
It with conventional method, prepares the material and the press of 300T or more is needed to suppress, and because of excessive height, the density at both ends is long-range
In intermediate density, density gradient is formed, when sintering is yielding, cannot meet the needs；
The present embodiment is as shown in Fig. 2, its process prepared is：
The semicircle blank fritter 1 of 50T press compacting φ 200mm, high 20mm, two blank fritters 1 is used to be spliced into one first
Circular blank fritter combination 2, then by ten（Four are only shown in Fig. 2）Blank fritter combination 2 is superimposed, and it is whole to form one
The plastic bag sealing of blank 3 is carried out isostatic pressed by block blank 3 under 200Pa pressure, and multiple blank fritters 1 is made to combine closely,
It is not easy to disperse, and by isostatic pressed, 3 even density of blank, when sintering is unlikely to deform；According to feeding vertically shown in Fig. 2 when sintering,
One layer of high-temperature resistant particle alumina powder is spread between the bottom and load bearing board, and the blank fritter being bolted together combination 2 is made to be sintered
It can be slided on load bearing board when volume contraction, and the blank fritter combination 2 of isostatic pressed together is made to be not easy to separate, passed through
High temperature sintering is melted together admittedly completely between blank fritter 1, forms an entirety；When post-processing abrade surface blank fritter 1 it
Between trace, be reprocessed into required size and shape, i.e. large scale material 4；
Maximal density difference by testing 4 different parts of large scale material that the present embodiment obtains is 0.8%.
Embodiment 3：
The present embodiment prepares the cyclic annular ferrite core of nickel-zinc of φ 200mm × 180mm, high 200mm；
It with conventional method, prepares the material and the press of 300T or more is needed to suppress, and because of excessive height, the density at both ends is long-range
In intermediate density, density gradient is formed, when sintering is yielding, cannot meet the needs；
The present embodiment is as shown in figure 3, its process prepared is：
The fan-shaped blank fritter 1 for using 50T press compacting 1/4 φ 200mm × 180mm high 20mm first, by four fan-shaped blanks
Fritter 1 is spliced into a circular blank fritter combination 2, then by ten（Four are only shown in Fig. 3）2 superposition of blank fritter combination
Together, it forms a monoblock blank 3 and the plastic bag sealing of blank 3 is subjected to isostatic pressed under 200Pa pressure, make multiple blanks
Fritter 1 is combined closely, and is not easy to disperse, and by isostatic pressed, 3 even density of blank, and when sintering is unlikely to deform；According to figure when sintering
It feeds vertically shown in 3, one layer of high-temperature resistant particle zirconia powder is spread between the bottom and load bearing board, keeps the blank being bolted together small
Block combination 2 can be slided when being sintered volume contraction on load bearing board, and make the blank fritter combination 2 of isostatic pressed together
It is not easy to separate, by high temperature sintering, be melted together admittedly completely between blank fritter 1, form an entirety；Table is abraded when post-processing
Trace between face blank fritter 1 is reprocessed into required size and shape, i.e. large scale material 4；
Maximal density difference by testing 4 different parts of large scale material that the present embodiment obtains is 0.9%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (11)
1. a kind of preparation method of large scale material, process includes powder processed, molding, isostatic pressed, sintering and post-processing, feature
It is：The molding procedure uses multistage forming method, specifically,
Powder is shaped to the blank fritter that height is relatively low, area is smaller first（1）, then by multiple blank fritters（1）It is assembled
It is combined at blank fritter（2）, then by multiple blank fritters combine（2）Superposition reaches required height, forms blank（3）；
It is combined along blank fritter when sintering circuit feeds（1）Direction of superposition feeds vertically, and blank fritter is combined（2）It is packed into high temperature
Sintering furnace passes through high temperature sintering, blank fritter（1）Between be melted together admittedly completely, formed an entirety；
Post-processing process abrades the combination of surface blank fritter（1）Between trace to get to large scale material（4）.
2. the preparation method of large scale material as described in claim 1, which is characterized in that the blank（3）It is high being packed into
Before warm sintering furnace, isostatic pressed is carried out.
3. the preparation method of large scale material as described in claim 1, which is characterized in that the material is ferrite.
4. the preparation method of large scale material as described in claim 1, which is characterized in that the material is metal alloy material
Material.
5. the preparation method of large scale material as described in claim 1, which is characterized in that when sintering circuit feeds, at most bottom
One layer of high-temperature resistant particle is spread between layer and load bearing board.
6. the preparation method of large scale material as claimed in claim 5, which is characterized in that the high-temperature resistant particle is zirconium
Grain.
7. the preparation method of large scale material as described in claim 1, which is characterized in that the blank fritter（1）Sectional area
For 400mm2-10000mm2, it is highly 10mm-80mm, the blank fritter combination（2）Sectional area is 400 mm2-40000mm2,
Height is 10mm-80mm, the blank（3）Sectional area is 400 mm2-40000mm2, it is highly 100mm-1000mm.
8. the preparation method of large scale material as claimed in claim 2, which is characterized in that the hydrostatic pressure is
100MPa-1000MPa。
9. the preparation method of large scale material as described in claim 1, which is characterized in that the large scale material（4）For length
Cube, the blank fritter combination（2）It is by 2-4 block blank fritters（1）It is assembled.
10. the preparation method of large scale material as described in claim 1, which is characterized in that the large scale material（4）For circle
Cylindricality, the blank fritter combination（2）It is by 2 pieces of blank fritters（1）It is assembled.
11. the preparation method of large scale material as described in claim 1, which is characterized in that the large scale material（4）For circle
Ring, the blank fritter combination（2）It is by 2-8 block blank fritters（1）It is assembled.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216380A (en) * | 2019-05-31 | 2019-09-10 | 河南科技大学 | A kind of increasing material manufacturing method of remelting after preset welding wire |
| CN113410039A (en) * | 2021-06-18 | 2021-09-17 | 中国电子科技集团公司第九研究所 | Preparation method of multi-pole magnetic ring based on HALBACH structure |
| CN114289996A (en) * | 2021-12-15 | 2022-04-08 | 北京航星机器制造有限公司 | Large-size platform manufacturing and creep control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056371A (en) * | 2013-01-18 | 2013-04-24 | 徐州金石彭源稀土材料厂 | Technology for preparing neodymium-iron-boron permanent-magnet material with orientation length L>/=60mm |
| CN105161278A (en) * | 2015-08-19 | 2015-12-16 | 宁波韵升股份有限公司 | Preparation method of bulk sintered neodymium-iron-boron permanent magnet |
| CN106180705A (en) * | 2016-07-08 | 2016-12-07 | 中铝广西有色金源稀土有限公司 | A kind of method for preparing powder metallurgy |
| CN106782977A (en) * | 2017-01-24 | 2017-05-31 | 湖南航天磁电有限责任公司 | A kind of preparation method of large scale sintered samarium cobalt permanent magnet |
-
2018
- 2018-04-27 CN CN201810389986.4A patent/CN108568526A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056371A (en) * | 2013-01-18 | 2013-04-24 | 徐州金石彭源稀土材料厂 | Technology for preparing neodymium-iron-boron permanent-magnet material with orientation length L>/=60mm |
| CN105161278A (en) * | 2015-08-19 | 2015-12-16 | 宁波韵升股份有限公司 | Preparation method of bulk sintered neodymium-iron-boron permanent magnet |
| CN106180705A (en) * | 2016-07-08 | 2016-12-07 | 中铝广西有色金源稀土有限公司 | A kind of method for preparing powder metallurgy |
| CN106782977A (en) * | 2017-01-24 | 2017-05-31 | 湖南航天磁电有限责任公司 | A kind of preparation method of large scale sintered samarium cobalt permanent magnet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216380A (en) * | 2019-05-31 | 2019-09-10 | 河南科技大学 | A kind of increasing material manufacturing method of remelting after preset welding wire |
| CN113410039A (en) * | 2021-06-18 | 2021-09-17 | 中国电子科技集团公司第九研究所 | Preparation method of multi-pole magnetic ring based on HALBACH structure |
| CN114289996A (en) * | 2021-12-15 | 2022-04-08 | 北京航星机器制造有限公司 | Large-size platform manufacturing and creep control method |
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Application publication date: 20180925 |