CN104759857B - A kind of method that powder metallurgy prepares metal porous box body - Google Patents
A kind of method that powder metallurgy prepares metal porous box body Download PDFInfo
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- CN104759857B CN104759857B CN201510209288.8A CN201510209288A CN104759857B CN 104759857 B CN104759857 B CN 104759857B CN 201510209288 A CN201510209288 A CN 201510209288A CN 104759857 B CN104759857 B CN 104759857B
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention provides a kind of method that powder metallurgy prepares metal porous box body, comprises the following steps：First, metal dust one is rolled using powder rolls, after sintering, obtains metal porous sheet material；2nd, three-dimensional entity model is set up using Solidworks softwares, and the sheet-metal unfolding function that application software is carried draws blank size, then cutting stock is carried out to metal porous sheet material；3rd, Bending Mould is designed and made, then bending is carried out, semi-finished product box body is obtained；4th, slurry is prepared；The 5th, slurry is spread evenly across the corner of semi-finished product box body with fill up the gap, and sintering makes slurry welding is diffused with semi-finished product box body；6th, shaping is repaired, obtains metal porous box body.Present invention, avoiding that heat affected area of the conventional bending welding in welding process be wayward and the technical problem such as the increase of oxygen content, improve its mechanical property and decay resistance, extend the service life of box body.
Description
Technical field
The invention belongs to powder metallurgical technology, and in particular to a kind of powder metallurgy prepares the side of metal porous box body
Method.
Background technology
Air flow method element typically has perforated board, bubble cap tray, valve tray, sieve plate and porous plate etc. several.Due to punching
Plate, bubble cap tray, valve tray, sieve plate price are relatively low, are received by most of users on conventional market, but in gas
Distributing homogeneity requires that above-mentioned several sheet materials can not meet growing demand under higher working condition.And it is powder sintered
Porous plate have bending duct so as to surface forms the air-flow of disorder, has certain mixing effect, increases gas-solid two
The time for contacting and area, improve reaction efficiency, therefore become air-flow by the porous plate that powder metallurgy porous material is made
The development trend of distributed component.
A kind of metal porous box body can serve as container, can be used as air flow method element again, and the metal porous box body can be made
Critical component for gas-particle two-phase reactor.For metal compaction material, existing punch forming technology fully meets box
The making of body.But for porous material, its elongation percentage typically only 1%～3%, as a consequence it is hardly possible to punch forming.And it is existing
The technology that box body is made for metal porous sheet material is all using first bending, the technique of normal welding again.This technology is present
Defect is that heat affected area is wayward during normal welding, and oxygen content increases, and greatly reduces the corrosion-resistant of element
Property.
It would therefore be highly desirable to research and develop a kind of in the preparation of metal porous box body air flow method element, it is to avoid normal welding defect
Method for preparing powder metallurgy.
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 powder metallurgy system
The method of standby metal porous box body.This method avoid heat affected area of the conventional bending-welding in welding process to be difficult
The technical problem such as control and the increase of oxygen content, improves its mechanical property and decay resistance, extends the use of box body
Life-span.
For solving above-mentioned technical problem, the technical solution used in the present invention is：A kind of powder metallurgy prepares metal porous box
The method of body, it is characterised in that the method is comprised the following steps：
Step one, metal dust one is rolled using powder rolls, obtain slab, then by slab in temperature be
60min～120min is sintered under conditions of 1000 DEG C～1300 DEG C, metal porous sheet material is obtained；The thickness of the metal porous sheet material
Spend for 0.5mm～3.5mm, the porosity of the metal porous sheet material is 20%～40%；
Step 2, the three-dimensional entity model for setting up metal porous box body to be prepared using Solidworks softwares, so
The sheet-metal unfolding function of being carried using Solidworks softwares afterwards draws the blank size of metal porous box body, afterwards using laser
Cutting machine carries out cutting stock to metal porous sheet material described in step one；
Step 3, adopt Proe Design of Dies Software for Design Bending Moulds, then according to design make Bending Mould,
Afterwards by cutting stock in step 2 after metal porous sheet material be positioned on the bender equipped with Bending Mould, pressure be 1t
～5t, speed obtain semi-finished product box body for carrying out bending under conditions of 5mm/min～15mm/min；The semi-finished product box body
Corner is with jagged；
Step 4, metal dust two is added in the ethanol solution of polyvinyl butyral resin and is well mixed, obtain slurry；
The material of the metal dust two is identical with the material of metal dust one；
Step 5, slurry described in step 4 is spread evenly across the corner of semi-finished product box body described in step 3 to fill up
Breach, the semi-finished product box body for being then coated with slurry are put in sintering furnace, under conditions of temperature is 1000 DEG C～1300 DEG C
Insulation 60min～120min is diffused welding；
Step 6, by step 5 through Diffusion Welding after semi-finished product box body carry out repairing shaping, obtain metal porous box
Body.
The preparation method of above-mentioned a kind of metal porous box body, it is characterised in that metal dust one described in step one
Granularity is 50 μm～250 μm.
The preparation method of above-mentioned a kind of metal porous box body, it is characterised in that the speed of rolling is described in step one
0.6m/min～1.6m/min, the pressure of the rolling is 60t～150t.
The preparation method of above-mentioned a kind of metal porous box body, it is characterised in that metal dust one described in step one
Material is nickel, nickel alloy, titanium or stainless steel.
The preparation method of above-mentioned a kind of metal porous box body, it is characterised in that metal powder in slurry described in step 4
The weight/mass percentage composition at end two is 50%～70%.
The preparation method of above-mentioned a kind of metal porous box body, it is characterised in that metal dust two described in step 4
Granularity is 5 μm～20 μm.
The preparation method of above-mentioned a kind of metal porous box body, it is characterised in that the fourth of polyvinyl alcohol contracting described in step 4
In the ethanol solution of aldehyde, the weight/mass percentage composition of polyvinyl butyral resin is 0.1%～0.3%, balance of absolute ethyl alcohol.
The preparation method of above-mentioned a kind of metal porous box body, it is characterised in that Diffusion Welding is in gas described in step 5
Body flow is 1m3/ h～4m3Carry out under the hydrogen atmosphere of/h, or be not more than 1 × 10 in vacuum-3Enter under the vacuum condition of Pa
OK.
The present invention has advantages below compared with prior art：
1st, raw material sources of the invention extensively, be easy to get, preparation process is simple, and the metal porous box body is mainly used in air-flow
Distribution, can be used as the critical component of gas-particle two-phase reactor.
2nd, using the metal porous box body prepared by the method for the present invention compared with existing bending-welding, it is to avoid
Heat affected area during normal welding is wayward and the technical problem such as the increase of oxygen content, improve its mechanical property and
Decay resistance, extends the service life of box body.
With reference to the accompanying drawings and examples the present invention is described in further detail.
Description of the drawings
Fig. 1 is the top view of metal porous box body prepared by the embodiment of the present invention 1 to 4.
Fig. 2 is the front view of metal porous box body prepared by the embodiment of the present invention 1 to 4.
Structural representations of the Fig. 3 for the metal porous sheet material after 1 to 4 cutting stock of the embodiment of the present invention.
Specific embodiment
Embodiment 1
The specification of the present invention metal porous box body to be prepared is 300mm × 150mm × 20mm × R10mm (made gold
The top view of genus polyporus box body is as shown in figure 1, its front view is as shown in Figure 2)；Powder metallurgy of the present invention prepares metal porous box body
Method comprise the following steps：
Step one, metal dust one is rolled using powder rolls, controlled rolling speed is 0.8m/min, rolling
Pressure is 100t, obtains slab, and slab is sintered 90min under conditions of temperature is for 1200 DEG C then, obtains thickness for 2mm,
Porosity is 30% metal porous sheet material；The metal dust one is nickel powder that granularity is 50 μm～250 μm；
Step 2, the three-dimensional entity model for setting up metal porous box body to be prepared using Solidworks softwares, and
The sheet-metal unfolding function that application Solidworks softwares are carried draws the blank size of metal porous box body, is then cut using laser
Cutting mill carries out cutting stock to metal porous sheet material described in step one, and the structure of the metal porous sheet material after cutting stock is as schemed
Shown in 3；
Step 3, adopt Proe Design of Dies Software for Design Bending Moulds, then according to design make Bending Mould,
Afterwards by cutting stock in step 2 after metal porous sheet material be positioned on the bender equipped with Bending Mould, in pressure be
4t, speed obtain semi-finished product box body for carrying out bending under conditions of 15mm/min；The corner of the semi-finished product box body is with scarce
Mouthful；
Step 4, metal dust two is added in the ethanol solution of polyvinyl butyral resin and is well mixed, obtain slurry,
In slurry, the weight/mass percentage composition of metal dust two is 60%；The metal dust two be granularity be 5 μm～20 μm, material with gold
Category one identical nickel powder of powder；The weight/mass percentage composition of polyvinyl butyral resin in the ethanol solution of the polyvinyl butyral resin
For 0.1%, balance of absolute ethyl alcohol；
Step 5, slurry described in step 4 is spread evenly across the corner of semi-finished product box body described in step 3 to fill up
Breach, is then placed in sintering furnace, is incubated 100min, slurry is carried out with semi-finished product box body under conditions of temperature is for 1200 DEG C
Diffusion Welding；The Diffusion Welding is 1m in gas flow3Carry out under the hydrogen atmosphere of/h；
Step 6, by step 5 through Diffusion Welding after semi-finished product box body carry out repairing shaping, obtain metal porous box
Body.
The present embodiment prepares metal porous box body using powder metallurgic method, it is to avoid conventional bending-welding is in welding
During heat affected area is wayward and the technical problem such as the increase of oxygen content, improve its mechanical property and corrosion resistance
Can, extend the service life of box body.
Embodiment 2
The specification of the present invention metal porous box body to be prepared is 350mm × 180mm × 20mm × R10mm (made gold
The top view of genus polyporus box body is as shown in figure 1, its front view is as shown in Figure 2)；Powder metallurgy of the present invention prepares metal porous box body
Method comprise the following steps：
Step one, metal dust one is rolled using powder rolls, controlled rolling speed is 1.2m/min, rolling
Pressure is 80t, obtains slab, and slab is sintered 120min under conditions of temperature is for 1000 DEG C then, obtains thickness for 3mm,
Porosity is 40% metal porous sheet material；The metal dust one is stainless steel powder that granularity is 50 μm～250 μm；
Step 2, the three-dimensional entity model for setting up metal porous box body to be prepared using Solidworks softwares, and
The sheet-metal unfolding function that application Solidworks softwares are carried draws the blank size of metal porous box body, is then cut using laser
Cutting mill carries out cutting stock to metal porous sheet material described in step one, and the structure of the metal porous sheet material after cutting stock is as schemed
Shown in 3；
Step 3, adopt Proe Design of Dies Software for Design Bending Moulds, then according to design make Bending Mould,
Afterwards by cutting stock in step 2 after metal porous sheet material be positioned on the bender equipped with Bending Mould, in pressure be
2t, speed obtain semi-finished product box body for carrying out bending under conditions of 8mm/min；The corner of the semi-finished product box body is with scarce
Mouthful；
Step 4, metal dust two is added in the ethanol solution of polyvinyl butyral resin and is well mixed, obtain slurry,
In slurry, the weight/mass percentage composition of metal dust two is 55%；The metal dust two be granularity be 5 μm～20 μm, material with gold
Category one identical stainless steel powder of powder；The quality percentage of polyvinyl butyral resin in the ethanol solution of the polyvinyl butyral resin
Content is 0.1%, balance of absolute ethyl alcohol；
Step 5, slurry described in step 4 is spread evenly across the corner of semi-finished product box body described in step 3 to fill up
Breach, is then placed in sintering furnace, is incubated 60min, slurry is carried out with semi-finished product box body under conditions of temperature is for 1100 DEG C
Diffusion Welding；The Diffusion Welding is not more than 1 × 10 in vacuum-3Carry out under the vacuum condition of Pa；
Step 6, by step 5 through Diffusion Welding after semi-finished product box body carry out repairing shaping, obtain metal porous box
Body.
The present embodiment prepares metal porous box body using powder metallurgic method, it is to avoid conventional bending-welding is in welding
During heat affected area is wayward and the technical problem such as the increase of oxygen content, improve its mechanical property and corrosion resistance
Can, extend the service life of box body.
Embodiment 3
The specification of the present invention metal porous box body to be prepared is 400mm × 100mm × 10mm × R5mm (made metals
The top view of porous box body is as shown in figure 1, its front view is as shown in Figure 2)；Powder metallurgy of the present invention prepares metal porous box body
Method is comprised the following steps：
Step one, metal dust one is rolled using powder rolls, controlled rolling speed is 0.6m/min, rolling
Pressure is 150t, obtains slab, and slab is sintered 60min under conditions of temperature is for 1000 DEG C then, and obtaining thickness is
3.5mm, porosity are 20% metal porous sheet material；The metal dust one is titanium valve that granularity is 50 μm～250 μm；
Step 2, the three-dimensional entity model for setting up metal porous box body to be prepared using Solidworks softwares, and
The sheet-metal unfolding function that application Solidworks softwares are carried draws the blank size of metal porous box body, is then cut using laser
Cutting mill carries out cutting stock to metal porous sheet material described in step one, and the structure of the metal porous sheet material after cutting stock is as schemed
Shown in 3；
Step 3, adopt Proe Design of Dies Software for Design Bending Moulds, then according to design make Bending Mould,
Afterwards by cutting stock in step 2 after metal porous sheet material be positioned on the bender equipped with Bending Mould, in pressure be
1t, speed obtain semi-finished product box body for carrying out bending under conditions of 5mm/min；The corner of the semi-finished product box body is with scarce
Mouthful；
Step 4, metal dust two is added in the ethanol solution of polyvinyl butyral resin and is well mixed, obtain slurry,
In slurry, the weight/mass percentage composition of metal dust two is 50%；The metal dust two be granularity be 5 μm～20 μm, material with gold
Category one identical titanium valve of powder；The weight/mass percentage composition of polyvinyl butyral resin in the ethanol solution of the polyvinyl butyral resin
For 0.1%, balance of absolute ethyl alcohol；
Step 5, slurry described in step 4 is spread evenly across the corner of semi-finished product box body described in step 3 to fill up
Breach, is then placed in sintering furnace, is incubated 120min, slurry is carried out with semi-finished product box body under conditions of temperature is for 1000 DEG C
Diffusion Welding；The Diffusion Welding is 4m in gas flow3Carry out under the hydrogen atmosphere of/h；
Step 6, by step 5 through Diffusion Welding after semi-finished product box body carry out repairing shaping, obtain metal porous box
Body.
The present embodiment prepares metal porous box body using powder metallurgic method, it is to avoid conventional bending-welding is in welding
During heat affected area is wayward and the technical problem such as the increase of oxygen content, improve its mechanical property and corrosion resistance
Can, extend the service life of box body.
Embodiment 4
The specification of the present invention metal porous box body to be prepared is 500mm × 200mm × 10mm × R20mm (made gold
The top view of genus polyporus box body is as shown in figure 1, its front view is as shown in Figure 2)；Powder metallurgy of the present invention prepares metal porous box body
Method comprise the following steps：
Step one, metal dust one is rolled using powder rolls, controlled rolling speed is 1.6m/min, rolling
Pressure is 60t, obtains slab, and slab is sintered 80min under conditions of temperature is for 1300 DEG C then, obtains thickness for 0.5mm,
Porosity is 40% metal porous sheet material；The metal dust one is nickel alloy powder that granularity is 50 μm～250 μm；
Step 2, the three-dimensional entity model for setting up metal porous box body to be prepared using Solidworks softwares, and
The sheet-metal unfolding function that application Solidworks softwares are carried draws the blank size of metal porous box body, is then cut using laser
Cutting mill carries out cutting stock to metal porous sheet material described in step one, and the structure of the metal porous sheet material after cutting stock is as schemed
Shown in 3；
Step 3, adopt Proe Design of Dies Software for Design Bending Moulds, then according to design make Bending Mould,
Afterwards by cutting stock in step 2 after metal porous sheet material be positioned on the bender equipped with Bending Mould, in pressure be
5t, speed obtain semi-finished product box body for carrying out bending under conditions of 15mm/min；The corner of the semi-finished product box body is with scarce
Mouthful；
Step 4, metal dust two is added in the ethanol solution of polyvinyl butyral resin and is well mixed, obtain slurry,
In slurry, the weight/mass percentage composition of metal dust two is 70%；The metal dust two be granularity be 5 μm～20 μm, material with gold
Category one identical nickel alloy powder of powder；The quality percentage of polyvinyl butyral resin in the ethanol solution of the polyvinyl butyral resin
Content is 0.3%, balance of absolute ethyl alcohol；
Step 5, slurry described in step 4 is spread evenly across the corner of semi-finished product box body described in step 3 to fill up
Breach, is then placed in sintering furnace, is incubated 60min, slurry is carried out with semi-finished product box body under conditions of temperature is for 1300 DEG C
Diffusion Welding；The Diffusion Welding is not more than 1 × 10 in vacuum-3Carry out under the vacuum condition of Pa；
Step 6, by step 5 through Diffusion Welding after semi-finished product box body carry out repairing shaping, obtain metal porous box
Body.
The present embodiment prepares metal porous box body using powder metallurgic method, it is to avoid conventional bending-welding is in welding
During heat affected area is wayward and the technical problem such as the increase of oxygen content, improve its mechanical property and corrosion resistance
Can, extend the service life of box body.
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 method that powder metallurgy prepares metal porous box body, it is characterised in that the method is comprised the following steps：
Step one, metal dust one is rolled using powder rolls, obtain slab, be then 1000 DEG C by slab in temperature
60min～120min is sintered under conditions of～1300 DEG C, metal porous sheet material is obtained；The thickness of the metal porous sheet material is
0.5mm～3.5mm, the porosity of the metal porous sheet material is 20%～40%；The material of the metal dust one is nickel, nickel
Alloy, titanium or stainless steel；
Step 2, the three-dimensional entity model for setting up metal porous box body to be prepared using Solidworks softwares, Ran Houli
The sheet-metal unfolding function of being carried with software draws the blank size of metal porous box body, afterwards using laser cutting machine to step one
Described in metal porous sheet material carry out cutting stock；
Step 3, adopt Proe Design of Dies Software for Design Bending Moulds, then according to design make Bending Mould, afterwards
Metal porous sheet material after by cutting stock in step 2 is positioned on the bender equipped with Bending Mould, pressure be 1t～
5t, speed obtain semi-finished product box body for carrying out bending under conditions of 5mm/min～15mm/min；The four of the semi-finished product box body
Angle is with jagged；
Step 4, metal dust two is added in the ethanol solution of polyvinyl butyral resin and is well mixed, obtain slurry；Described
The material of metal dust two is identical with the material of metal dust one；
Step 5, slurry described in step 4 is spread evenly across the corner of semi-finished product box body described in step 3 to fill up scarce
Mouthful, the semi-finished product box body for being then coated with slurry is put in sintering furnace, is protected under conditions of temperature is for 1000 DEG C～1300 DEG C
Warm 60min～120min is diffused welding；
Step 6, by step 5 through Diffusion Welding after semi-finished product box body carry out repairing shaping, obtain metal porous box body.
2. the method that a kind of powder metallurgy according to claim 1 prepares metal porous box body, it is characterised in that step one
Described in metal dust one granularity be 50 μm～250 μm.
3. the method that a kind of powder metallurgy according to claim 1 prepares metal porous box body, it is characterised in that step one
Described in the speed that rolls be 0.6m/min～1.6m/min, the pressure of the rolling is 60t～150t.
4. the method that a kind of powder metallurgy according to claim 1 prepares metal porous box body, it is characterised in that step 4
Described in slurry the weight/mass percentage composition of metal dust two be 50%～70%.
5. the method that a kind of powder metallurgy according to claim 1 prepares metal porous box body, it is characterised in that step 4
Described in metal dust two granularity be 5 μm～20 μm.
6. the method that a kind of powder metallurgy according to claim 1 prepares metal porous box body, it is characterised in that step 4
Described in polyvinyl butyral resin ethanol solution in polyvinyl butyral resin weight/mass percentage composition be 0.1%～0.3%, remaining
Measure as absolute ethyl alcohol.
7. the method that a kind of powder metallurgy according to claim 1 prepares metal porous box body, it is characterised in that step 5
Described in Diffusion Welding gas flow be 1m3/ h～4m3Carry out under the hydrogen atmosphere of/h, or vacuum be not more than 1 ×
10-3Carry out under the vacuum condition of Pa.
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| CN110772824A (en) * | 2019-11-04 | 2020-02-11 | 海盐得胜化工设备有限公司 | Cage type float valve and production process thereof |
| CN110722164B (en) * | 2019-11-29 | 2020-09-29 | 西北有色金属研究院 | Preparation method for improving uniformity of large-size powder rolled metal porous plate |
| CN111889989B (en) * | 2020-09-17 | 2020-12-18 | 常州锦瑟医疗信息科技有限公司 | High-precision machining method and system based on mixed reality |
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| CN1094402C (en) * | 1999-02-01 | 2002-11-20 | 中南工业大学 | Method for preparation of titanium aluminum base alloy valve |
| US8955220B2 (en) * | 2009-03-11 | 2015-02-17 | Emerson Climate Technologies, Inc. | Powder metal scrolls and sinter-brazing methods for making the same |
| JP5277426B2 (en) * | 2009-03-31 | 2013-08-28 | 日本ピストンリング株式会社 | Method for joining metal powder injection molded body and method for producing metal composite sintered body |
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