CN108907186A - A kind of sintering method enhancing metal fiber polyporous material intensity, acoustic damping characteristic - Google Patents
A kind of sintering method enhancing metal fiber polyporous material intensity, acoustic damping characteristic Download PDFInfo
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- CN108907186A CN108907186A CN201810926618.9A CN201810926618A CN108907186A CN 108907186 A CN108907186 A CN 108907186A CN 201810926618 A CN201810926618 A CN 201810926618A CN 108907186 A CN108907186 A CN 108907186A
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- metal fiber
- polyporous material
- fiber polyporous
- damping characteristic
- acoustic damping
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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
- B22F3/002—Manufacture of articles essentially made from metallic fibres
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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
- B22F3/10—Sintering only
- B22F3/11—Making porous 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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- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
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Abstract
The invention discloses a kind of enhancing metal fiber polyporous material intensity, the sintering method of acoustic damping characteristic, include the following steps：（1）Compression process,（2）Preheating insulation processing,（3）High temperature sintering processing.The present invention optimizes the sintering method for improving metal fiber polyporous material, its simple process, each step collocation is reasonable, cost is relatively low for working process, the metal fiber polyporous material finally sintered into has good mechanical property and corrosion resistance, and acoustic damping characteristic is strong, has further expanded its use scope, the great market competitiveness and productivity effect.
Description
Technical field
The invention belongs to metallic fiber and product working process technical fields, and in particular to a kind of enhancing metallic fiber is porous
The sintering method of the strength of materials, acoustic damping characteristic.
Background technique
Metallic fiber is an important branch of metal material field, is the knot of material science and fibre science cross development
Fruit.It is to be rapidly developed in present material science, and have both function and knot by the metal fiber polyporous material after metallic fiber sintered
The new engineering material of structure double attribute haveing excellent performance, lightweight, high-strength feature are with good application prospect, mesh
Before be widely used to aerospace, metallurgical machinery, petrochemical industry, telecommunications, chemical industry chemistry, building traffic, energy environment protection,
The numerous areas such as defence and military, bio-pharmaceuticals, nuclear technology and sea, land and air weaponry.
Sintering is to influence one of the key factor of metal fiber polyporous material micro-structure.With metal powder porous material phase
Than the metallic fiber in metal fiber polyporous material is in loose state mostly, and the bridging phenomenon between metallic fiber is serious, meeting
The chance of actual contact between fiber is caused significantly to reduce, so that the sintering of metallic fiber is very difficult.Using traditional solid phase
Sintering process is hardly formed enough nodes, it cannot be guaranteed that suitable mechanics and physical and chemical performance.In addition, porous with metal powder
Material is compared, and since the unique external geometrical property of metallic fiber and inside are rich in a large amount of deformation and energy storage, is sintered the shape of node
It is increasingly complex at process, and after use conventional method sintering, metallic fiber abnormal grain growth is distributed in Bamboo-shaped, causes gold
The mechanical property and corrosion resistance for belonging to textile porous materials sharply decline.In order to improve this problem, people are made that largely
Experiment is to improve.Application No. is：201510547883.2 disclosing one kind prevents metal fiber polyporous material abnormal grain growth
Sintering method, by vacuum sealing, take advantage of high temperature feeding and make to be brought rapidly up, take advantage of high temperature taking-up and make setting for the techniques such as natural cooling
Meter, it is therefore prevented that the phenomenon that fiber skeleton abnormal grain growth occurs.But this mode technique is relatively complicated, carries out again after vacuum sealing
Heating needs to consume the final characteristic of bigger thermal energy, higher cost, and material obtained and is still not achieved what people were increasingly promoted
Performance requirement.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of enhancing metal fiber polyporous material intensity, noise reduction are provided
The sintering method of characteristic.
The present invention is achieved by the following technical solutions：
A kind of sintering method enhancing metal fiber polyporous material intensity, acoustic damping characteristic, includes the following steps：
（1）Compression process：
Metal fiber polyporous material is put into hydraulic press and carries out compression process, until the porosity of metal fiber polyporous material
Until reaching required requirement, then pressed metal fiber polyporous material is taken out spare；
（2）Preheating insulation processing：
By step（1）Metal fiber polyporous material after compression process, which is put into insulating box, carries out the pre-heat treatment, during which simultaneously
Ultrasonication is carried out, is taken out after 20 ~ 25min spare；
（3）High temperature sintering processing：
By step（2）Treated, and metal fiber polyporous material is immediately placed in vacuum drying oven is sintered, first with 230 ~
Temperature in vacuum drying oven is risen to 1050 ~ 1080 DEG C by the rate of 240 DEG C/min, then 4 ~ 6min of isothermal holding at this temperature,
Metal fiber polyporous material is taken out i.e. after the temperature in vacuum drying oven is finally down to room temperature with the rate of 140 ~ 160 DEG C/min
It can；The processing of He ion irradiation has also persistently been carried out during sintering processes.
Further, which is characterized in that step（1）Described in compression process after metal fiber polyporous material porosity
It is 75 ~ 90%.
Further, step（1）Described in metal fiber polyporous material material be stainless steel or FeCrAl alloy.
Further, step（1）Described in metal fiber polyporous material metallic fiber diameter be 5 ~ 50 μm.
Further, step（2）Described in the pre-heat treatment when keep insulating box in temperature be 200 ~ 250 DEG C.
Further, step（2）Described in ultrasonication when control ultrasonic wave frequency be 400 ~ 500kHz.
Further, step（3）Described in sintering processes before first will in vacuum drying oven heating remain 280 ~ 300 DEG C.
Further, step（3）Described in He ion irradiation processing when control irradiation energy be 800 ~ 850keV, note
Entering amount is 5 ~ 7 × 1018 cm-2。
Metallic fiber used in metal fiber polyporous material is usually to be carried out by wire using bundle drawing method technique
What multi pass drawing was prepared, the diameter of wire is reduced by 0.5mm~0.8mm to 5 μm~50 after bundle drawing method is processed
μm, it is even lower, and since wire experienced big deformation during this, cause the skeletal internal of metallic fiber to store largely
Deformation and energy storage and stress, when conventional sintering technique prepares metal fiber polyporous material, in furnace temperature-rise period, metal is fine
The deformation and energy storage of dimension skeletal internal will be gradually released, and the crystal grain of metallic fiber skeletal internal successively undergoes recovery and recrystallization
With abnormal growth three phases so that the metallic fiber skeleton abnormal grain growth of sintered metal fiber polyporous material, more
In Bamboo-shaped, after Bamboo-shaped crystal grain is formed, crystal boundary position is weakest link, the power of prepared metal fiber polyporous material
It learns performance and corrosion resistance sharply declines.In this regard, effectively improving fiber present invention improves the treatment process of sintering
It is comprehensive to use quality.Wherein, the pre-heat treatment has been carried out to the metal fiber polyporous material after compression process, during which rationally controlled
Preheating temperature cooperation ultrasonication can largely eliminate the stress of internal residual, promote the release of part energy storage,
Then high temperature sintering processing has been carried out, with the lifting for controlling temperature that suitably heats up with rate of temperature fall, can control and weaken crystal grain
Misgrowth, and be conducive to the slow release of internal energy storage, the He ion irradiation processing during which also carried out can promote between fiber
It joins and locates the fusion of tissue, improve the generation of sintering node, and the He particle adulterated at node can enhance the knot between tissue
Strength and stability are closed, in addition, the surface texture for the texturing metallic fiber that radiation treatment can also be appropriate, and be formed on
A certain amount of small helium steeps tissue, specific surface area and micro- hole tissue is improved on the basis of fiber, and then enhance to sound wave
Reflection and absorbability, so that metal fiber polyporous material not only carrys out noise reduction with the hole that fiber is constituted each other, effect is more
It is good.
The present invention has the following advantages that compared with prior art：
The present invention optimizes the sintering method for improving metal fiber polyporous material, simple process, and each step collocation rationally, is processed
Processing cost is lower, and the metal fiber polyporous material finally sintered into has good mechanical property and corrosion resistance, and disappears
Sound characteristic is strong, has further expanded its use scope, the great market competitiveness and productivity effect.
Detailed description of the invention
Fig. 1 is the fiber skeleton OM organization chart of the sintered metal fiber polyporous material of the embodiment of the present invention 2.
Fig. 2 is the fiber skeleton OM organization chart of the sintered metal fiber polyporous material of control group 1.
Fig. 3 is the fiber skeleton OM organization chart of the sintered metal fiber polyporous material of control group 2.
Specific embodiment
Embodiment 1
A kind of sintering method enhancing metal fiber polyporous material intensity, acoustic damping characteristic, includes the following steps：
（1）Compression process：
Metal fiber polyporous material is put into hydraulic press and carries out compression process, until the porosity of metal fiber polyporous material
Until reaching required requirement, then pressed metal fiber polyporous material is taken out spare；
（2）Preheating insulation processing：
By step（1）Metal fiber polyporous material after compression process, which is put into insulating box, carries out the pre-heat treatment, during which simultaneously
Ultrasonication is carried out, is taken out after 20min spare；
（3）High temperature sintering processing：
By step（2）Treated, and metal fiber polyporous material is immediately placed in vacuum drying oven is sintered, first with 230
DEG C/temperature in vacuum drying oven rises to 1050 DEG C by the rate of min, then isothermal holding 4min at this temperature, finally with 140
DEG C/temperature in vacuum drying oven is down to after room temperature and takes out metal fiber polyporous material by the rate of min；In the sintering processes phase
Between also persistently carried out He ion irradiation processing.
Further, which is characterized in that step（1）Described in compression process after metal fiber polyporous material porosity
It is 75%.
Further, step（1）Described in metal fiber polyporous material material be stainless steel.
Further, step（1）Described in metal fiber polyporous material metallic fiber diameter be 5 ~ 50 μm.
Further, step（2）Described in the pre-heat treatment when keep insulating box in temperature be 200 DEG C.
Further, step（2）Described in ultrasonication when control ultrasonic wave frequency be 400kHz.
Further, step（3）Described in sintering processes before first will in vacuum drying oven heating remain 280 DEG C.
Further, step（3）Described in He ion irradiation processing when control irradiation energy be 800keV, injection rate
It is 5 × 1018 cm-2。
Embodiment 2
A kind of sintering method enhancing metal fiber polyporous material intensity, acoustic damping characteristic, includes the following steps：
（1）Compression process：
Metal fiber polyporous material is put into hydraulic press and carries out compression process, until the porosity of metal fiber polyporous material
Until reaching required requirement, then pressed metal fiber polyporous material is taken out spare；
（2）Preheating insulation processing：
By step（1）Metal fiber polyporous material after compression process, which is put into insulating box, carries out the pre-heat treatment, during which simultaneously
Ultrasonication is carried out, is taken out after 23min spare；
（3）High temperature sintering processing：
By step（2）Treated, and metal fiber polyporous material is immediately placed in vacuum drying oven is sintered, first with 235
DEG C/temperature in vacuum drying oven rises to 1060 DEG C by the rate of min, then isothermal holding 5min at this temperature, finally with 150
DEG C/temperature in vacuum drying oven is down to after room temperature and takes out metal fiber polyporous material by the rate of min；In the sintering processes phase
Between also persistently carried out He ion irradiation processing.
Further, which is characterized in that step（1）Described in compression process after metal fiber polyporous material porosity
It is 85%.
Further, step（1）Described in metal fiber polyporous material material be stainless steel.
Further, step（1）Described in metal fiber polyporous material metallic fiber diameter be 5 ~ 50 μm.
Further, step（2）Described in the pre-heat treatment when keep insulating box in temperature be 230 DEG C.
Further, step（2）Described in ultrasonication when control ultrasonic wave frequency be 450kHz.
Further, step（3）Described in sintering processes before first will in vacuum drying oven heating remain 290 DEG C.
Further, step（3）Described in He ion irradiation processing when control irradiation energy be 830keV, injection rate
It is 6 × 1018 cm-2。
Embodiment 3
A kind of sintering method enhancing metal fiber polyporous material intensity, acoustic damping characteristic, includes the following steps：
（1）Compression process：
Metal fiber polyporous material is put into hydraulic press and carries out compression process, until the porosity of metal fiber polyporous material
Until reaching required requirement, then pressed metal fiber polyporous material is taken out spare；
（2）Preheating insulation processing：
By step（1）Metal fiber polyporous material after compression process, which is put into insulating box, carries out the pre-heat treatment, during which simultaneously
Ultrasonication is carried out, is taken out after 25min spare；
（3）High temperature sintering processing：
By step（2）Treated, and metal fiber polyporous material is immediately placed in vacuum drying oven is sintered, first with 240
DEG C/temperature in vacuum drying oven rises to 1080 DEG C by the rate of min, then isothermal holding 6min at this temperature, finally with 160
DEG C/temperature in vacuum drying oven is down to after room temperature and takes out metal fiber polyporous material by the rate of min；In the sintering processes phase
Between also persistently carried out He ion irradiation processing.
Further, which is characterized in that step（1）Described in compression process after metal fiber polyporous material porosity
It is 90%.
Further, step（1）Described in metal fiber polyporous material material be FeCrAl alloy.
Further, step（1）Described in metal fiber polyporous material metallic fiber diameter be 5 ~ 50 μm.
Further, step（2）Described in the pre-heat treatment when keep insulating box in temperature be 250 DEG C.
Further, step（2）Described in ultrasonication when control ultrasonic wave frequency be 500kHz.
Further, step（3）Described in sintering processes before first will in vacuum drying oven heating remain 300 DEG C.
Further, step（3）Described in He ion irradiation processing when control irradiation energy be 850keV, injection rate
It is 7 × 1018 cm-2。
Comparative example 1
This comparative example 1 compared with Example 2, in step（2）In preheating insulation processing, ultrasonication operation is eliminated,
Method and step in addition to this is all the same.
Comparative example 2
This comparative example 2 compared with Example 2, in step（3）High temperature sintering processing punching eliminates He ion irradiation processing behaviour
Make, method and step in addition to this is all the same.
Control group 1
Application No. is：201510547883.2 disclosing a kind of sintering side for preventing metal fiber polyporous material abnormal grain growth
Method.
Control group 2
Existing traditional sintering method, specifically：Compression process is first carried out to metal fiber polyporous material using hydraulic press, until
The porosity of metal fiber polyporous material is set to reach design requirement（Designing porosity is 85%）, then by the gold after compression process
Belong to textile porous materials to be put into vacuum drying oven, the temperature of vacuum drying oven is then set as 1050 DEG C and is started to warm up, to vacuum drying oven
Interior temperature is constant be 1050 DEG C after timing keep the temperature 5min, then furnace cooling obtains sintered metal fiber polyporous material.
In order to compare effect of the present invention, to above-described embodiment 2, comparative example 1, comparative example 2, control group 1, control
2 methods of group correspond to the material after sintering processes and are tested for the property（Metallic fiber raw material used is same as Example 2）, tool
Body correlation data is as shown in table 1 below：
Table 1
Note：Tensile strength described in upper table 1 is tested referring to YS/T 1133-2016；The corrosion weight loss rate reference
HG/T 2159-91 is tested；The resonance sound-absorbing coefficient specifically uses impedance tube method to carry out acoustic absorptivity measurement, sound absorption
Conductivity test instrument is that the 4206 type impedance tubes, power amplifier, Pulse 3560C of Denmark B&K company manufacture acquire front end etc.
The system of composition, measurement range are：100Hz~6400Hz.
The synthesis of metal fiber polyporous material after the method for the present invention sintering processes it can be seen from upper table 1 uses quality
Significant enhancing, the great market competitiveness and application value are obtained.
The sintered fiber grain structure of the present invention more fine uniform, control group 1 it can be seen from the tissue in attached drawing
It is slightly larger, and the tissue of control group 2 is then in Bamboo-shaped, more unstable.
Claims (8)
1. the sintering method of a kind of enhancing metal fiber polyporous material intensity, acoustic damping characteristic, which is characterized in that including walking as follows
Suddenly：
（1）Compression process：
Metal fiber polyporous material is put into hydraulic press and carries out compression process, until the porosity of metal fiber polyporous material
Until reaching required requirement, then pressed metal fiber polyporous material is taken out spare；
（2）Preheating insulation processing：
By step（1）Metal fiber polyporous material after compression process, which is put into insulating box, carries out the pre-heat treatment, during which simultaneously
Ultrasonication is carried out, is taken out after 20 ~ 25min spare；
（3）High temperature sintering processing：
By step（2）Treated, and metal fiber polyporous material is immediately placed in vacuum drying oven is sintered, first with 230 ~
Temperature in vacuum drying oven is risen to 1050 ~ 1080 DEG C by the rate of 240 DEG C/min, then 4 ~ 6min of isothermal holding at this temperature,
Metal fiber polyporous material is taken out i.e. after the temperature in vacuum drying oven is finally down to room temperature with the rate of 140 ~ 160 DEG C/min
It can；The processing of He ion irradiation has also persistently been carried out during sintering processes.
2. the sintering method of a kind of enhancing metal fiber polyporous material intensity according to claim 1, acoustic damping characteristic, special
Sign is, step（1）Described in compression process after metal fiber polyporous material porosity be 75 ~ 90%.
3. the sintering method of a kind of enhancing metal fiber polyporous material intensity according to claim 1, acoustic damping characteristic, special
Sign is, step（1）Described in metal fiber polyporous material material be stainless steel or FeCrAl alloy.
4. the sintering method of a kind of enhancing metal fiber polyporous material intensity according to claim 1, acoustic damping characteristic, special
Sign is, step（1）Described in metal fiber polyporous material metallic fiber diameter be 5 ~ 50 μm.
5. the sintering method of a kind of enhancing metal fiber polyporous material intensity according to claim 1, acoustic damping characteristic, special
Sign is, step（2）Described in the pre-heat treatment when keep insulating box in temperature be 200 ~ 250 DEG C.
6. the sintering method of a kind of enhancing metal fiber polyporous material intensity according to claim 1, acoustic damping characteristic, special
Sign is, step（2）Described in ultrasonication when control ultrasonic wave frequency be 400 ~ 500kHz.
7. the sintering method of a kind of enhancing metal fiber polyporous material intensity according to claim 1, acoustic damping characteristic, special
Sign is, step（3）Described in sintering processes before first will in vacuum drying oven heating remain 280 ~ 300 DEG C.
8. the sintering method of a kind of enhancing metal fiber polyporous material intensity according to claim 1, acoustic damping characteristic,
It is characterized in that, step（3）Described in He ion irradiation processing when control irradiation energy be 800 ~ 850keV, injection rate be 5 ~
7×1018 cm-2。
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Cited By (4)
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| CN111719759A (en) * | 2020-07-03 | 2020-09-29 | 中建一局集团装饰工程有限公司 | Ceiling texturing sound absorption radiation protection structure and construction method |
| CN112518239A (en) * | 2020-11-13 | 2021-03-19 | 浙江海洋大学 | Screw pump rotor rotary die extrusion forming process |
| CN113333750A (en) * | 2021-05-31 | 2021-09-03 | 西北有色金属研究院 | Preparation process of metal fiber porous material with three-dimensional negative Poisson's ratio |
| CN115430834A (en) * | 2022-09-27 | 2022-12-06 | 山西奇色环保科技股份有限公司 | Method for preparing large-size sintered felt by folding method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111719759A (en) * | 2020-07-03 | 2020-09-29 | 中建一局集团装饰工程有限公司 | Ceiling texturing sound absorption radiation protection structure and construction method |
| CN112518239A (en) * | 2020-11-13 | 2021-03-19 | 浙江海洋大学 | Screw pump rotor rotary die extrusion forming process |
| CN113333750A (en) * | 2021-05-31 | 2021-09-03 | 西北有色金属研究院 | Preparation process of metal fiber porous material with three-dimensional negative Poisson's ratio |
| CN115430834A (en) * | 2022-09-27 | 2022-12-06 | 山西奇色环保科技股份有限公司 | Method for preparing large-size sintered felt by folding method |
| CN115430834B (en) * | 2022-09-27 | 2024-05-10 | 山西奇色环保科技股份有限公司 | Method for preparing large-size sintered felt by folding method |
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| CN108907186B (en) | 2019-12-06 |
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