CN106735227A - A kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element - Google Patents
A kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element Download PDFInfo
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- CN106735227A CN106735227A CN201611138566.6A CN201611138566A CN106735227A CN 106735227 A CN106735227 A CN 106735227A CN 201611138566 A CN201611138566 A CN 201611138566A CN 106735227 A CN106735227 A CN 106735227A
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- jacket
- hip
- high temperature
- screwing element
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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
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
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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
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/06—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of threaded articles, e.g. nuts
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Abstract
The invention belongs to hot isostatic pressing technique field, and in particular to a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element.Including following some technical characteristic：(1) wrapping structure design and welding；(2) material powder selection；(3) powder packing and soldering and sealing；(4) vacuum outgas；(5) HIP sintering densification；(6) it is processed into screwing element.Screwing element prepared by the method has interior tissue uniform, and oxygen content is less than 150ppm, and consistency has the advantages that high rigidity, high-wearing feature and superior corrosion resistance and high temperature oxidation resistance up to more than 99%.
Description
Technical field
The invention belongs to hot isostatic pressing technique field, and in particular to a kind of high temperature insostatic pressing (HIP) of double screw extruder screwing element
Preparation method.
Background technology
As plastic cement industry, food service industry, pharmaceuticals industry, building material industry are developed rapidly, these industries are squeezed to twin-screw
Go out wear-resisting, the anti-corrosion and high temperature oxidation resistance requirement more and more higher of the screwing element of machine.Domestic screwing element is main at present
Formed by high-speed steel processing and manufacturing, when in raw material containing the wearer high such as glass, nylon, calcium carbonate or containing mordant addition
During thing, high-speed steel screwing element service life is greatly shortened, it is impossible to meet use requirement.Compared with high-speed steel, high temperature alloy tool
There is hardness higher, more excellent wearability, corrosion resistance and high temperature oxidation resistance can effectively resist the abrasion of abrasive material, together
When have excellent decay resistance concurrently.
The high temperature alloy prepared using hot isostatic pressing method has even tissue, crystal grain are tiny, oxygen content is low, consistency is high etc.
Excellent characteristic, at present, the country is not yet related to the research report of high temperature alloy screwing element.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of high temperature insostatic pressing (HIP) preparation side of double screw extruder screwing element
Method, overcomes the performance deficiency problem of conventional threads element, improves wear-resistant, the corrosion-resistant and resistance to high temperature oxidation of screwing element
Performance, extends the service life of screwing element.
In order to realize this purpose, the present invention is adopted the technical scheme that：
A kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element, is applied to the system of high temperature alloy screwing element
It is standby：
(1) wrapping structure design and welding
Wrapping structure includes lid, wireway, jacket inner core, outer jacket and jacket bottom on jacket；Using argon arc welding side
Formula welds jacket；
(2) material powder selection
150ppm is less than from oxygen content, grain size intervals are the superalloy powder of 100~300 mesh, superalloy powder
Sintering activity and mobility according to technique need selection；
(3) powder packing and soldering and sealing
Jacket being wiped before dress powder, controlling dress powder density during dress powder, soldering and sealing jacket after the completion of dress powder using melting welding and adds
Weld metal zone intensity meets technological requirement during weldering mode ensures hot isostatic pressing；
(4) vacuum outgas
The vacuum outgas of jacket is carried out in heating furnace, heat tracing in degasification process, and degassing temperature is 300 DEG C~500
DEG C, final vacuum is less than or equal to 2 × 10-3Pa, soaking time is 6 hours；
Vacuum outgas is completed by wireway, by wireway soldering and sealing after the completion of vacuum outgas；
(5) HIP sintering densification
Jacket after vacuum outgas is put into densification is sintered in high temperature insostatic pressing (HIP) stove；
(6) it is processed into screwing element
The jacket that the high temperature insostatic pressing (HIP) of completion is densified is machined, remove covered on outer jacket, wireway, jacket and
Jacket bottom, the screwing element being sized is obtained by wire cutting into grinding.
Further, a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as described above, in jacket
The size of each part fills powder density according to the shape and size of screwing element product, superalloy powder and shrinkage factor determines.
Further, a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as described above, in jacket
Core selects medium carbon steel, and lid, jacket inner core, outer jacket and jacket bottom use mild steel material on jacket.
Further, a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as described above, in jacket
Each Vehicle Processing length in upper and lower termination of core is the groove of 8mm, and groove wall thickness is 2mm.
Further, a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as described above, step (3)
In powder packing and soldering and sealing, jacket is wiped with a kind of in acetone, alcohol before dress powder, the dust on removal jacket surface, greasy dirt and
Sweat stain.
Further, a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as described above, step (3)
In powder packing and soldering and sealing, dress powder density is controlled to be specially during dress powder：By tapping outer jacket, dress powder density is improved extremely
More than 60%.
Further, a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as described above, step (5)
In HIP sintering densification, the technique of high temperature insostatic pressing (HIP) is that temperature is 1000 DEG C, and pressure 120MPa, soaking time is 5h.
The beneficial effect of technical solution of the present invention is：
It is both the first that screwing element material is selected to prepare high temperature alloy screwing element using hot isostatic pressing method, is also screw thread
The innovation of element forming technique, compared with traditional screwing element, the inventive method substantially increases the use longevity of screwing element
Life, with wide market prospects.Screwing element prepared by the method has interior tissue uniform, and oxygen content is less than 150ppm,
Consistency has the advantages that high rigidity, high-wearing feature and superior corrosion resistance and high temperature oxidation resistance, quality up to more than 99%
Reliable and stable, compared with traditional screwing element, service life improves 3~5 times.
Brief description of the drawings
Fig. 1 is wrapping structure schematic diagram in the high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element；
Fig. 2 is the high temperature insostatic pressing (HIP) preparation method flow chart of double screw extruder screwing element.
In figure：1 upper and lower frames, 2 snakelike framves, 3 support frames, 4 lateral blocked frames, 5 bands.
Specific embodiment
Technical solution of the present invention is further elaborated below by the drawings and specific embodiments.
The invention discloses a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element, to manufacture a kind of size
As a example by for the high temperature insostatic pressing (HIP) double screw extruder screwing element of 65 × φ of φ, 37 × 56mm, the specific embodiment party of this method is illustrated
Formula.
(1) wrapping structure design and welding
As shown in figure 1, wrapping structure includes lid, wireway, jacket inner core, outer jacket and jacket bottom on jacket；Using
Argon arc welding mode welds jacket.
In jacket the size of each part according to the shape and size of screwing element product, superalloy powder fill powder density and
Shrinkage factor determines.
To ensure that jacket inner core has good comprehensive mechanical performance, jacket inner core selects medium carbon steel, to prevent heat etc. quiet
Jacket drawing crack phenomenon occurs caused by jacket inner core is different with the contraction of outer jacket during pressure, each car in the upper and lower termination of jacket inner core
Processing length is the groove of 8mm, and groove wall thickness is 2mm, and compound material cost and welding performance consider, the upper and lower end cap of jacket and
Outer jacket uses mild steel material.Jacket is welded using argon arc welding mode.
(2) material powder selection
150ppm is less than from oxygen content, grain size intervals are the superalloy powder of 100~300 mesh, it is ensured that powder has
Sintering activity and good mobility higher.The sintering activity and mobility of superalloy powder need selection according to technique.
(3) powder packing and soldering and sealing
Use acetone or alcohol wipe jacket before dress powder, the dust on removal jacket surface, greasy dirt and sweat stain, it is ensured that powder not by
Pollution, jacket outer wall is tapped during dress powder, improves dress powder density to more than 60%, soldering and sealing jacket after the completion of dress powder, using molten
Weld metal zone has enough intensity in welding and be welded with mode and ensuring hot isostatic pressing.
(4) vacuum outgas
The vacuum outgas of jacket is carried out in heating furnace, heat tracing in degasification process, and degassing temperature is 300 DEG C~500
DEG C, final vacuum is less than or equal to 2 × 10-3Pa, soaking time is 6 hours, and vacuum outgas is completed by wireway, vacuum outgas
After the completion of by wireway soldering and sealing.
(5) HIP sintering densification
Jacket after vacuum outgas is put into densification is sintered in high temperature insostatic pressing (HIP) stove.The work of the high temperature insostatic pressing (HIP) in this example
Skill is 1000 DEG C of temperature, pressure 120MPa, soaking time 5h.
(6) it is processed into screwing element
The jacket that the high temperature insostatic pressing (HIP) of completion is densified is machined, outer jacket is removed, except airway, jacket end
Lid, into 56mm length, it is the screwing element of 65 × φ of φ, 37 × 56mm to obtain size by grinding for wire cutting.
Screwing element prepared by the method has interior tissue uniform, and oxygen content is less than 150ppm, consistency up to 99% with
On, there is high rigidity, high-wearing feature and superior corrosion resistance and high temperature oxidation resistance, steady quality reliability, with biography
The screwing element of system is compared, and service life improves 3~5 times.
Claims (7)
1. a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element, is applied to the system of high temperature alloy screwing element
It is standby, it is characterised in that：
(1) wrapping structure design and welding
Wrapping structure includes lid, wireway, jacket inner core, outer jacket and jacket bottom on jacket；Welded using argon arc welding mode
Connect jacket；
(2) material powder selection
150ppm is less than from oxygen content, grain size intervals are the superalloy powder of 100~300 mesh, the burning of superalloy powder
Knot activity and mobility need selection according to technique；
(3) powder packing and soldering and sealing
Jacket is wiped before dress powder, dress powder density, soldering and sealing jacket after the completion of dress powder, using melting welding and the side of being welded with are controlled during dress powder
Weld metal zone intensity meets technological requirement during formula ensures hot isostatic pressing；
(4) vacuum outgas
The vacuum outgas of jacket is carried out in heating furnace, heat tracing in degasification process, and degassing temperature is 300 DEG C~500 DEG C, most
Whole vacuum is less than or equal to 2 × 10-3Pa, soaking time is 6 hours；
Vacuum outgas is completed by wireway, by wireway soldering and sealing after the completion of vacuum outgas；
(5) HIP sintering densification
Jacket after vacuum outgas is put into densification is sintered in high temperature insostatic pressing (HIP) stove；
(6) it is processed into screwing element
The jacket that the high temperature insostatic pressing (HIP) of completion is densified is machined, lid and jacket on outer jacket, wireway, jacket is removed
Bottom, the screwing element being sized is obtained by wire cutting into grinding.
2. a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as claimed in claim 1, it is characterised in that：
The size of each part fills powder density according to the shape and size of screwing element product, superalloy powder and shrinkage factor is true in jacket
It is fixed.
3. a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as claimed in claim 2, it is characterised in that：
Jacket inner core selects medium carbon steel, and lid, jacket inner core, outer jacket and jacket bottom use mild steel material on jacket.
4. a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as claimed in claim 3, it is characterised in that：
Each Vehicle Processing length in upper and lower termination of jacket inner core is the groove of 8mm, and groove wall thickness is 2mm.
5. a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as claimed in claim 1, it is characterised in that：
In step (3) powder packing and soldering and sealing, with a kind of wiping jacket in acetone, alcohol before dress powder, the dust on removal jacket surface,
Greasy dirt and sweat stain.
6. a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as claimed in claim 1, it is characterised in that：
In step (3) powder packing and soldering and sealing, dress powder density is controlled to be specially during dress powder：By tapping outer jacket, dress powder is improved
Density is to more than 60%.
7. a kind of high temperature insostatic pressing (HIP) preparation method of double screw extruder screwing element as claimed in claim 1, it is characterised in that：
In the densification of step (5) HIP sintering, the technique of high temperature insostatic pressing (HIP) is that temperature is 1000 DEG C, pressure 120MPa, soaking time
It is 5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611138566.6A CN106735227B (en) | 2016-12-12 | 2016-12-12 | Hot isostatic pressing preparation method of threaded element of double-screw extruder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611138566.6A CN106735227B (en) | 2016-12-12 | 2016-12-12 | Hot isostatic pressing preparation method of threaded element of double-screw extruder |
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| CN106735227A true CN106735227A (en) | 2017-05-31 |
| CN106735227B CN106735227B (en) | 2020-10-23 |
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| CN201611138566.6A Active CN106735227B (en) | 2016-12-12 | 2016-12-12 | Hot isostatic pressing preparation method of threaded element of double-screw extruder |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247063A (en) * | 2018-01-29 | 2018-07-06 | 北京汇越新材料科技有限公司 | A kind of composite bimetal pipe material preparation method based on heat and other static pressuring processes |
| CN108284228A (en) * | 2018-01-29 | 2018-07-17 | 北京汇越新材料科技有限公司 | It is a kind of based on the double screw extruder of the heat and other static pressuring processes preparation method of compound whole bushing |
| CN108284227A (en) * | 2018-01-29 | 2018-07-17 | 北京汇越新材料科技有限公司 | A kind of preparation method of the direct coating comminutor machine barrel based on heat and other static pressuring processes |
| CN112893843A (en) * | 2021-01-15 | 2021-06-04 | 中国矿业大学 | Preparation method of MoNiB metal ceramic threaded element |
| CN112916855A (en) * | 2021-01-25 | 2021-06-08 | 北京航空航天大学 | Hot isostatic pressing accurate forming method for complex thin-wall rib structure |
| CN113005318A (en) * | 2021-02-25 | 2021-06-22 | 航天材料及工艺研究所 | Powder titanium-aluminum alloy step-by-step hot isostatic pressing preparation method |
| CN116024484A (en) * | 2023-01-09 | 2023-04-28 | 天津际航新材料有限公司 | Preparation method of high-hardness high-thermal-conductivity iron-copper alloy |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247063A (en) * | 2018-01-29 | 2018-07-06 | 北京汇越新材料科技有限公司 | A kind of composite bimetal pipe material preparation method based on heat and other static pressuring processes |
| CN108284228A (en) * | 2018-01-29 | 2018-07-17 | 北京汇越新材料科技有限公司 | It is a kind of based on the double screw extruder of the heat and other static pressuring processes preparation method of compound whole bushing |
| CN108284227A (en) * | 2018-01-29 | 2018-07-17 | 北京汇越新材料科技有限公司 | A kind of preparation method of the direct coating comminutor machine barrel based on heat and other static pressuring processes |
| CN112893843A (en) * | 2021-01-15 | 2021-06-04 | 中国矿业大学 | Preparation method of MoNiB metal ceramic threaded element |
| CN112916855A (en) * | 2021-01-25 | 2021-06-08 | 北京航空航天大学 | Hot isostatic pressing accurate forming method for complex thin-wall rib structure |
| CN113005318A (en) * | 2021-02-25 | 2021-06-22 | 航天材料及工艺研究所 | Powder titanium-aluminum alloy step-by-step hot isostatic pressing preparation method |
| CN113005318B (en) * | 2021-02-25 | 2022-05-24 | 航天材料及工艺研究所 | Powder titanium-aluminum alloy step-by-step hot isostatic pressing preparation method |
| CN116024484A (en) * | 2023-01-09 | 2023-04-28 | 天津际航新材料有限公司 | Preparation method of high-hardness high-thermal-conductivity iron-copper alloy |
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