CN106493371A - A kind of preparation method of compact metal flange porous metal tube - Google Patents
A kind of preparation method of compact metal flange porous metal tube Download PDFInfo
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- CN106493371A CN106493371A CN201611080724.7A CN201611080724A CN106493371A CN 106493371 A CN106493371 A CN 106493371A CN 201611080724 A CN201611080724 A CN 201611080724A CN 106493371 A CN106493371 A CN 106493371A
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- Prior art keywords
- compact
- metal tube
- compact metal
- flange
- porous
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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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
- B22F7/004—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part
-
- 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
- B22F3/11—Making porous workpieces or articles
-
- 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
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
Abstract
The invention discloses a kind of preparation method of compact metal flange porous metal tube, the compact metal flange porous metal tube includes porous metals body, compact metal tube head and compact metal flange, compact metal tube head is arranged on one end of porous metals body, compact metal tube head is ring inclined-plane with the joint face of porous metals body, on compact metal tube head, the method is compact metal flange：First, processing compact metal tube head and compact metal flange；2nd, the compacting tool set intracavity filler metal powder above the compact metal tube head, in cold isostatic press carries out pressed compact molding, obtains blank；3rd, blank is put in sintering mold, is sintered, and obtains compact metal flange porous metal tube.The present invention solve the metal tube of two kinds of structures of conventional welded flange and flanged monoblock type under arms in as rupturing easily occur in commissure stress concentration or material difference, and the problems such as the corrosion cracking of commissure.
Description
Technical field
The invention belongs to porous metal material processing technique field, and in particular to a kind of compact metal flange porous metal tube
Preparation method.
Background technology
Porous ceramic pipe as the porous filtering pipe that applies earliest due to its good high temperature resistant, decay resistance,
There is wider application.But shaking property of heat resistanceheat resistant and compression shock intensity are poor for the red brittleness of porous ceramic pipe itself, it is impossible to protect in addition
Its reliability in use is demonstrate,proved, the development of porous ceramic pipe is this severely limits.In the last few years, porous metal tube due to
Good temperature tolerance and excellent mechanical performance, while good toughness and heat conductivity make it have good heat resistanceheat resistant, shock resistance,
Additionally, porous metal tube also has good processing characteristics, the extensive concern of domestic and international researcher is caused.
At present, domestic porous metal tube is broadly divided into two kinds of structures, respectively welded flange structure (as shown in Figure 1) and band
Flange monolithic construction (as shown in Figure 2).Find during actually used, the porous metal tube of welded flange structure strong acid,
Under the corrosivity working condition such as high temperature, highly basic, the commissure stress concentration contacted with compact metal due to porous metals and material
Easily there is corrosion and porous metals problems of crack in the reasons such as the difference of structure, commissure.Although it is flanged monolithic porous
Metal tube solves the problems, such as the weld defect of welded flange structure well, but the unstability of filter medium transfer rate and
Agitation of the filter medium in filtering tank so that card can occur continuously to collide with the flange section and filtering tank of filter tube.Cause
Do not have compact metal intensity high for loose structure strength of flange in flanged monolithic porous metal tube, so the method for loose structure
Orchid can produce fine cracks in continuous collision.These fine cracks can cause porous in the continuous scour process of filter medium
Metal tube thoroughly ruptures at flange position.Therefore two kinds of structural porous metals of welded flange structure and flanged monolithic construction
Pipe is all difficult to the requirement for meeting modern industry service life.
Content of the invention
The technical problem to be solved is for above-mentioned the deficiencies in the prior art, there is provided a kind of compact metal
The preparation method of flange porous metal tube.The preparation method solves two kinds of structures of conventional welded flange and flanged monoblock type
Metal film under arms in due to commissure stress concentration and material difference easily occur fracture, commissure corrosion cracking the problems such as,
Connected in porous metals body in compact metal tube head by way of diffusion-sintering, enhance the intensity of connection, extend many
Service life of the mesoporous metal pipe in high temperature, high pressure and strong corrosive environment.
For solving above-mentioned technical problem, the technical solution used in the present invention is：A kind of compact metal flange porous metal tube
Preparation method, it is characterised in that the compact metal flange porous metal tube include porous metals body, compact metal tube head and
Compact metal flange, the compact metal tube head are arranged on one end of porous metals body, the compact metal tube head and porous
The joint face of metal tube is ring inclined-plane, and the compact metal flange is arranged on the compact metal tube head, the porous
Metal tube, compact metal tube head are identical with the material of compact metal flange, and the method is comprised the following steps：
Step one, according to drawing requirement using compact metal materials processing compact metal tube head and compact metal flange, institute
It is split-type structural or integral structure to state compact metal tube head and compact metal flange；
Step 2, when compact metal tube head and compact metal flange are split-type structural, compact metal tube head is placed in
In compacting tool set, when compact metal tube head and compact metal flange are integral type structure, then by compact metal tube head and densification
Metal flange is placed in compacting tool set, then the compacting tool set intracavity filler metal powder above the compact metal tube head, dress
Being placed in after filling in metal dust in cold isostatic press carries out pressed compact molding, obtains blank；
Step 3, blank described in step 2 is put in sintering mold, and the space in sintering mold and blank
Place's filling ceramic packing, makes ceramic packing coat blank completely, is then sintered, obtain compact metal flange porous
Metal tube.
A kind of preparation method of above-mentioned compact metal flange porous metal tube, it is characterised in that the porous metal tube
The material of body, compact metal tube head and compact metal flange is rustless steel, titanium, nickel, titanium alloy, nickel alloy or FeAl alloys.
A kind of preparation method of above-mentioned compact metal flange porous metal tube, it is characterised in that the porous metal tube
The porosity of body is 20%～40%.
A kind of preparation method of above-mentioned compact metal flange porous metal tube, it is characterised in that gold described in step 2
The granularity of category powder is 60 μm～120 μm.
The preparation method of above-mentioned a kind of compact metal flange porous metal tube, it is characterised in that press described in step 2
The pressure of base molding is 140 tons.
The preparation method of above-mentioned a kind of compact metal flange porous metal tube, it is characterised in that burn described in step 3
The temperature that knot is processed is 900 DEG C～1350 DEG C, and the time of the sintering processes is 1h～3h.
The preparation method of above-mentioned a kind of compact metal flange porous metal tube, it is characterised in that make pottery described in step 3
Porcelain filling is TiO2Ceramic packing, ZrO2Ceramic packing or Al2O3Ceramic packing.
The present invention has advantages below compared with prior art：
1st, preparation technology flow process of the present invention is simple, and low production cost, the requirement to production equipment are relatively low, is suitable to extensive
Industrialized production.
2nd, the method for the present invention overcomes the metal film of two kinds of structures of welded flange and flanged monoblock type in prior art
The problems such as fracture, commissure corrosion cracking easily occur due to commissure stress concentration and material difference under arms, by expanding
The mode for dissipating sintering makes compact metal tube head be connected with porous metals body, enhances the intensity for connecting between the two, extends
Service life of the porous metal tube in high temperature, high pressure and strong corrosive environment.
3rd, the porosity of sintered porous metal tube of the present invention is 20%～40%, with good air transmission coefficient, and
And when being applied to filter fuel gas and dust, filter efficiency up to more than 99%.
Technical scheme is described in further detail below by drawings and Examples.
Description of the drawings
Fig. 1 is the structural representation of the porous metal tube of prior art weld flange arrangement.
Fig. 2 is the structural representation of the porous metal tube of the flanged monolithic construction of prior art.
Fig. 3 is the structural representation of the compact metal flange porous metal tube of the embodiment of the present invention 1～3.
Fig. 4 is the structural representation of the compact metal flange porous metal tube of the embodiment of the present invention 4.
Description of reference numerals:
1 porous metals body；2 compact metal tube heads；3 compact metal flanges.
Specific embodiment
Embodiment 1
As shown in figure 3, the compact metal flange porous metal tube of the present embodiment includes porous metals body 1, compact metal
Tube head 2 and compact metal flange 3, the compact metal tube head 2 are arranged on one end of porous metals body 1, the compact metal
Tube head 2 is ring inclined-plane with the joint face of porous metals body 1, and the compact metal flange 3 is arranged on the compact metal pipe
On 2, the material of the porous metals body 1, compact metal tube head 2 and compact metal flange 3 is Monel400 alloys；
The method for preparing the compact metal flange porous metal tube is comprised the following steps：
Step one, according to drawing requirement using Monel400 alloy materials processing compact metal tube head 2 and compact metal method
Orchid 3, the compact metal tube head 2 and compact metal flange 3 are integral type structure；
Step 2, compact metal tube head 2 and compact metal flange 3 are placed in compacting tool set, then in compact metal
Compacting tool set intracavity filling Monel400 powder above tube head 2, is placed in cold isostatic press after filling Monel400 powder
Pressed compact molding is carried out, blank is obtained；The pressure of pressed compact molding is 140 tons；The granularity of the metal dust is 90 μm；
Step 3, blank described in step 2 is put in sintering mold, and the space in sintering mold and blank
Place's filling TiO2Ceramic packing, makes TiO2Ceramic packing coats blank completely, then sinters under conditions of temperature is for 1250 DEG C
2h is processed, compact metal flange porous metal tube is obtained, the porosity of the porous metals body 1 is 33%.
Survey according to standard GB/T/T 5249-1985 " permeability sintered metal materials, the measure in bubble sample aperture "
The maximum diameter of hole for obtaining compact metal flange porous metal tube manufactured in the present embodiment is 19 μm, and relative permeability is 110m3/
m2·h·kPa.According to international standard BS ISO 11155-2:2009 " air filters in passenger compartment " measure the present embodiment system
Filter efficiency of the standby compact metal flange porous metal tube for particle diameter not less than 1.5 μm of fuel gas and dust may be up to 99.5%
More than.Compact metal flange porous metal tube manufactured in the present embodiment is 43MPa with the tensile strength of the junction of flange, and with
Tensile strength at the welded flange porous metal tube same position of sample material and structure only has 24MPa, and the present embodiment system is described
The tensile strength of standby compact metal flange porous metal tube is greatly improved.
Embodiment 2
As shown in figure 3, compact metal flange porous metal tube manufactured in the present embodiment includes porous metals body 1, densification
Metal tube head 2 and compact metal flange 3, the compact metal tube head 2 are arranged on one end of porous metals body 1, the densification
Metal tube head 2 is ring inclined-plane with the joint face of porous metals body 1, and the compact metal flange 3 is installed in the fine and close gold
On category tube head 2, the material of the porous metals body 1, compact metal tube head 2 and compact metal flange 3 is 316L rustless steels,
The method for preparing the compact metal flange porous metal tube is comprised the following steps：
Step one, according to drawing requirement using 316L stainless steel materials processing compact metal tube head 2 and compact metal flange
3, the compact metal tube head 2 and compact metal flange 3 are integral type structure；
Step 2, compact metal tube head 2 and compact metal flange 3 are placed in compacting tool set, then in compact metal
Compacting tool set intracavity filling 316L powder of stainless steel above tube head 2, is placed in isostatic cool pressing after filling 316L powder of stainless steel
Pressed compact molding is carried out in machine, blank is obtained；Pressure is 140 tons；The granularity of the 316L powder of stainless steel is 63 μm.
Step 3, blank described in step 2 is put in sintering mold, and the space in sintering mold and blank
Place's filling ZrO2Ceramic packing, makes ZrO2Ceramic packing coats blank completely, then sinters under conditions of temperature is for 1270 DEG C
2h is processed, compact metal flange porous metal tube is obtained；The porosity of the porous metals body 1 is 29%.
Survey according to standard GB/T/T 5249-1985 " permeability sintered metal materials, the measure in bubble sample aperture "
The maximum diameter of hole for obtaining compact metal flange porous metal tube manufactured in the present embodiment is 16 μm, and relative permeability is 96m3/m2·
h·kPa.According to international standard BS ISO 11155-2:2009 " air filters in passenger compartment " measure manufactured in the present embodiment
Filter efficiency of the compact metal flange porous metal tube for particle diameter not less than 1 μm of fuel gas and dust may be up to more than 99.5%.
Compact metal flange porous metal tube manufactured in the present embodiment is 55MPa with the tensile strength of the junction of flange, and same material
Tensile strength at the welded flange porous metal tube same position of matter and structure only has 28MPa, illustrates manufactured in the present embodiment
The tensile strength of compact metal flange porous metal tube is greatly improved.
Embodiment 3
As shown in figure 3, compact metal flange porous metal tube manufactured in the present embodiment includes porous metals body 1, densification
Metal tube head 2 and compact metal flange 3, the compact metal tube head 2 are arranged on one end of porous metals body 1, the densification
Metal tube head 2 is ring inclined-plane with the joint face of porous metals body 1, and the compact metal flange 3 is installed in the fine and close gold
On category tube head 2, the material of the porous metals body 1, compact metal tube head 2 and compact metal flange 3 is pure Ti, prepares institute
The method for stating compact metal flange porous metal tube is comprised the following steps：
Step one, according to drawing requirement using pure Ti materials processings compact metal tube head 2 and compact metal flange 3, described
Compact metal tube head 2 and compact metal flange 3 are integral type structure；
Step 2, compact metal tube head 2 and compact metal flange 3 are placed in compacting tool set, then in compact metal
Compacting tool set intracavity filler metal Ti powder above tube head 2, being placed in cold isostatic press after filling metal Ti powder is carried out
Pressed compact molding, obtains blank；The granularity of the metal Ti powder is 60 μm；
Step 3, blank described in step 2 is put in sintering mold, and the space in sintering mold and blank
Place's filling ZrO2Ceramic packing, makes ZrO2Ceramic packing coats blank completely, then sinters under conditions of temperature is for 900 DEG C
3h is processed, compact metal flange porous metal tube is obtained；The porosity of the porous metals body 1 is 26%.
Survey according to standard GB/T/T 5249-1985 " permeability sintered metal materials, the measure in bubble sample aperture "
The maximum diameter of hole for obtaining compact metal flange porous metal tube manufactured in the present embodiment is 13 μm, and relative permeability is 20m3/m2·
h·kPa.According to international standard BS ISO 11155-2:2009 " air filters in passenger compartment " measure manufactured in the present embodiment
Filter efficiency of the compact metal flange porous metal tube for particle diameter not less than 0.3 μm of fuel gas and dust may be up to more than 99%.
Compact metal flange porous metal tube manufactured in the present embodiment is 43MPa with the tensile strength of the junction of flange, and same material
Tensile strength at the welded flange porous metal tube same position of matter and structure only has 26MPa, illustrates manufactured in the present embodiment
The tensile strength of compact metal flange porous metal tube is greatly improved.
Embodiment 4
As shown in figure 4, the compact metal flange porous metal tube of the present embodiment includes porous metals body 1, compact metal
Tube head 2 and compact metal flange 3, the compact metal tube head 2 are arranged on one end of porous metals body 1, the compact metal
Tube head 2 is ring inclined-plane with the joint face of porous metals body 1, and the compact metal flange 3 is arranged on the compact metal pipe
On 2, the material of the porous metals body 1, compact metal tube head 2 and compact metal flange 3 is 316L rustless steels；Prepare
The method of the compact metal flange porous metal tube is comprised the following steps：
Step one, according to drawing requirement using 316L stainless steel materials processing compact metal tube head 2 and compact metal flange
3, the compact metal tube head 2 and compact metal flange 3 are split-type structural；
Step 2, compact metal tube head 2 is placed in compacting tool set, then the pressing die above the compact metal tube head 2
Tool intracavity filling 316L stainless steel metal powder, is placed in cold isostatic press after filling 316L stainless steel metal powder and is pressed
Base molding, obtains blank；The stainless granularity of the 316L is 120 μm；
Step 3, blank described in step 2 is put in sintering mold, and the space in sintering mold and blank
Place's filling Al2O3Ceramic packing, makes Al2O3Ceramic packing coats blank completely, then burns under conditions of temperature is for 1350 DEG C
Knot processes 1h, finally by the way of welding is connected compact metal flange 3 with compact metal tube head 2 again, obtains compact metal
Flange porous metal tube；The porosity of the porous metals body 1 is 36%.
Survey according to standard GB/T/T 5249-1985 " permeability sintered metal materials, the measure in bubble sample aperture "
The maximum diameter of hole for obtaining compact metal flange porous metal tube manufactured in the present embodiment is 40 μm, and relative permeability is 120m3/
m2·h·kPa.According to international standard BS ISO 11155-2:2009 " air filters in passenger compartment " measure the present embodiment system
Standby compact metal flange porous metal tube for particle diameter not less than 20 μm of fuel gas and dust filter efficiency may be up to 99% with
On.Compact metal flange porous metal tube manufactured in the present embodiment is 73MPa with the tensile strength of the junction of flange, and same
Tensile strength at the welded flange porous metal tube same position of material and structure only has 52MPa, illustrates prepared by the present embodiment
The tensile strength of compact metal flange porous metal tube be greatly improved.
The above, is only presently preferred embodiments of the present invention, not the present invention is imposed any restrictions.Every according to invention skill
Any simple modification, change and equivalence changes that art is substantially made to above example, still fall within technical solution of the present invention
Protection domain in.
Claims (7)
1. a kind of preparation method of compact metal flange porous metal tube, it is characterised in that the compact metal flange porous metals
Pipe includes that porous metals body (1), compact metal tube head (2) and compact metal flange (3), compact metal tube head (2) set
The one end in porous metals body (1) is put, compact metal tube head (2) are ring with the joint face of porous metals body (1)
Inclined-plane, described compact metal flange (3) are on compact metal tube head (2), porous metals body (1), fine and close
Metal tube head (2) is identical with the material of compact metal flange (3), and the method is comprised the following steps：
Step one, according to drawing requirement using compact metal materials processing compact metal tube head (2) and compact metal flange (3),
Compact metal tube head (2) and compact metal flange (3) are split-type structural or integral structure；
Step 2, when compact metal tube head (2) and compact metal flange (3) are split-type structural, by compact metal tube head (2)
It is placed in compacting tool set, when compact metal tube head (2) and compact metal flange (3) are integral type structure, then by compact metal
Tube head (2) and compact metal flange (3) are placed in compacting tool set, then the compacting tool set above the compact metal tube head (2)
Intracavity filler metal powder, being placed in after filling metal dust in cold isostatic press carries out pressed compact molding, obtains blank；
Step 3, blank described in step 2 is put in sintering mold, and is filled out with the gap of blank in sintering mold
Ceramic packing is filled, is made ceramic packing coat the blank completely, is then sintered, obtain compact metal flange porous
Metal tube.
2. the preparation method of a kind of compact metal flange porous metal tube according to claim 1, it is characterised in that described
The material of porous metals body (1), compact metal tube head (2) and compact metal flange (3) is rustless steel, titanium, nickel, titanium and closes
Gold, nickel alloy or FeAl alloys.
3. the preparation method of a kind of compact metal flange porous metal tube according to claim 1, it is characterised in that described
The porosity of porous metals body (1) is 20%～40%.
4. a kind of preparation method of compact metal flange porous metal tube according to claim 1, it is characterised in that step
The granularity of metal dust described in two is 60 μm～120 μm.
5. a kind of preparation method of compact metal flange porous metal tube according to claim 1, it is characterised in that step
The pressure of pressed compact molding described in two is 140 tons.
6. a kind of preparation method of compact metal flange porous metal tube according to claim 1, it is characterised in that step
The temperature of sintering processes described in three is 900 DEG C～1350 DEG C, and the time of the sintering processes is 1h～3h.
7. a kind of preparation method of compact metal flange porous metal tube according to claim 1, it is characterised in that step
Ceramic packing described in three is TiO2Ceramic packing, ZrO2Ceramic packing or Al2O3Ceramic packing.
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Cited By (5)
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| CN109865838A (en) * | 2017-12-05 | 2019-06-11 | 肯纳金属公司 | Increases material manufacturing technology and its application |
| CN111229058A (en) * | 2018-11-28 | 2020-06-05 | 南京舒宜汇科学仪器有限公司 | Preparation process of ceramic composite membrane with metal protective layer |
| CN113714502A (en) * | 2021-09-08 | 2021-11-30 | 西北有色金属研究院 | Preparation method of tubular porous metal element with micro permeation flux |
| CN114905041A (en) * | 2022-07-19 | 2022-08-16 | 西部宝德科技股份有限公司 | Preparation method of external light type powder sintering porous element |
| CN115401201A (en) * | 2022-09-08 | 2022-11-29 | 广州赛隆增材制造有限责任公司 | Nickel-based alloy powder sintered filter tube and preparation method thereof |
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| CN113714502B (en) * | 2021-09-08 | 2022-05-20 | 西北有色金属研究院 | Preparation method of tubular porous metal element with micro permeation flux |
| CN114905041A (en) * | 2022-07-19 | 2022-08-16 | 西部宝德科技股份有限公司 | Preparation method of external light type powder sintering porous element |
| CN115401201A (en) * | 2022-09-08 | 2022-11-29 | 广州赛隆增材制造有限责任公司 | Nickel-based alloy powder sintered filter tube and preparation method thereof |
| CN115401201B (en) * | 2022-09-08 | 2024-04-05 | 广州赛隆增材制造有限责任公司 | Nickel-based alloy powder sintering filter pipe and preparation method thereof |
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