CN1449880A - Low temp sintering method for surface porous pipe - Google Patents
Low temp sintering method for surface porous pipe Download PDFInfo
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- CN1449880A CN1449880A CN 03116481 CN03116481A CN1449880A CN 1449880 A CN1449880 A CN 1449880A CN 03116481 CN03116481 CN 03116481 CN 03116481 A CN03116481 A CN 03116481A CN 1449880 A CN1449880 A CN 1449880A
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Abstract
The low-temp. sinterring method of surface perforated pipe includes the following steps: brushing base component required for sintering perforated layer with glue liquor, spraying the alloy copper tin powder on the base component brushed with glue liquor, after dried placing said base component into heating furnace with protective atmosphere, introducing hydrogen gas to make protection and heating to 400-500 deg.C, heat-insulating for 5-30 min., then quickly heating to 670-700 deg.C and heat-insulating for 60-90 min., and cooling under the protective atmosphere so as to can obtain the invented surface perforated pipe. The tin content in the described alloy copper tin powder is 9-13 wt%.
Description
Technical field
The present invention relates to the preparation method of slug type porous surface tube.
Background technology
The slug type porous surface tube has good boiling heat transfer ability, its heat transfer coefficient can reach 6-8 times of same light slip pipe, therefore have great application prospect in field of heat transfer, but the method for current production antipriming pipe requires sintering temperature very high, the too high matrix tubing tissue that causes of temperature changes, mechanical performance reduces, and causes very big distortion, and influence is used; In addition, sintering temperature is too high also to be caused a large amount of energy consumptions and is reduced equipment life, requires the too high input that causes excessive to device parameter, has limited the extensive use of porous surface tube.Patent U.S.P.3821018 has introduced a kind of phosphor-copper powder and copper powder method of mixed sintering by a certain percentage that adopts, and can reduce to temperature 740 ℃-850 ℃ method.Obviously, the sintering temperature of this method is still than higher.For steel, its eutectoid reaction temperature is at 723 ℃, and when on the steel pipe during sintered powder layer, steel can undergo phase transition, and can cause change in organization, and elevated temperature strength reduces, and distortion strengthens.In addition, two kinds of powder are difficult to mix, and the powder part is sticked not firmly behind the sintering, can come off.Experiment finds that the P elements in the phosphor-copper powder has poisoning effect to copper powder, can't also can cause sintering furnace to pollute powder sintered to copper pipe at 850 ℃ even higher temperature at all.
Summary of the invention
The technical issues that need to address of the present invention are the low-temperature sintering methods that disclose a kind of porous surface tube, to overcome the above-mentioned defective that prior art exists.
Technical conceive of the present invention is such:
According to copper-Xi binary phase diagraml, the signal bronze of stanniferous amount 9-13% is being a αGu Rongti to 800-830 ℃ of interval more than 350 ℃, when reaching more than 800-830 ℃, the solid-liquid two-phase coexistent can appear, therefore, obtain good porous parameter, 800 ℃ is the upper limit, through test of many times, obtain good sinter layer at 670-700 ℃.Its temperature range and sintering empirical equation T
Sintering=4/5T
Molten(T is an absolute temperature) coincide finely.
Method of the present invention comprises the steps:
Brush coating liquid on the substrate of the sintered porous layer of needs;
The alloyed copper tin powder is sprayed and is brushed with on the substrate of glue;
Drying is placed in the protective atmosphere heating furnace, and logical hydrogen shield is heated to 400～500 ℃ of insulations 5～30 minutes, and preferably the speed with 150～220 ℃/h heats up; quickly heat up to 670-700 ℃ again; be incubated 60～90 minutes, under protective atmosphere, cool off then, promptly obtain porous surface tube.
Said glue is polystyrene xylene solution or polyisobutene xylene solution, suitable concentration 15-25% (weight ratio).
Tin content is 9-13wt% in the said alloyed copper tin powder, the signal bronze powder that can preferably adopt atomization to produce, powder size-80～+ 325 orders.
Said substrate comprises copper, copper alloy or steel.
By above-mentioned disclosed technical scheme as seen, the present invention can realize 670-700 ℃ sintering without filler, obtains desirable porous layer on the surface of copper, copper alloy or steel, and the coefficient of heat transfer reaches 6-8 times of plain tube.This invention has reduced sintering temperature effectively when avoiding above bad phenomenon.This invention not only can also can obtain good sinter layer on plane or Special-Shaped Surface on tube wall.
The specific embodiment
Embodiment 1
The atomizing copper glass putty of-100～+ 160 order stanniferous 10%, be attached on the copper pipe of the long 210mm of Φ 22 * 2mm with 20% polystyrene xylene solution, speed with 200 ℃/h heats up, to 450 ℃ of insulations 20 minutes, be warming up to 670 ℃ of insulations 60 minutes, the water-cooled of coming out of the stove after stove is chilled to 300 ℃ with 300 ℃/h then.Sinter layer sticks firmly, actual measurement voidage 70%, and equivalent aperture 52 μ m, porous bed thickness 0.5mm, surveying its heat transfer coefficient with acetone is 8.2 times of same diameter light pipe.
Embodiment 2
The atomizing copper glass putty of-200～+ 250 order stanniferous 12%, the material of being attached to the long 210mm of Φ 22 * 2mm with 15% polyisobutene xylene solution is on the 20g steel pipe, speed with 200 ℃/h heats up, to 450 ℃ of insulations 20 minutes, be warming up to 700 ℃ of insulations 90 minutes, the air cooling of coming out of the stove after stove is chilled to 130 ℃ with 300 ℃/h then.Sinter layer sticks firmly, actual measurement voidage 63%, and equivalent aperture 47 μ m, porous bed thickness 0.37mm, surveying its heat transfer coefficient with acetone is 6.4 times of same diameter light pipe.
Claims (8)
1. the low-temperature sintering method of a porous surface tube is characterized in that, comprises the steps:
Brush coating liquid on the substrate of the sintered porous layer of needs;
The alloyed copper tin powder is sprayed and is brushed with on the substrate of glue;
Drying is placed in the protective atmosphere heating furnace, and logical hydrogen shield is heated to 400～500 ℃ of insulations, is heated to 670-700 ℃ again, insulation, and cooling promptly obtains porous surface tube.
2. method according to claim 1 is characterized in that, said glue is polystyrene xylene solution or polyisobutene xylene solution.
3. method according to claim 1 is characterized in that, gelatin concentration is 15-25% (weight ratio).
4. method according to claim 1 is characterized in that, tin content is 9-13wt% in the said alloyed copper tin powder.
5. method according to claim 4 is characterized in that, the signal bronze powder that adopts atomization to produce.
6. method according to claim 4 is characterized in that, powder size-80～+ 325 orders.
7. method according to claim 1 is characterized in that said substrate comprises copper, copper alloy or steel.
8. according to each described method of claim 1～7, it is characterized in that, be heated to 400～500 ℃ of insulations 5～30 minutes, quickly heat up to 670-700 ℃ again, be incubated 60～90 minutes, under protective atmosphere, cool off then with the speed of 150～220 ℃/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031164811A CN1188236C (en) | 2003-04-18 | 2003-04-18 | Low temp sintering method for surface porous pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031164811A CN1188236C (en) | 2003-04-18 | 2003-04-18 | Low temp sintering method for surface porous pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1449880A true CN1449880A (en) | 2003-10-22 |
| CN1188236C CN1188236C (en) | 2005-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031164811A Expired - Fee Related CN1188236C (en) | 2003-04-18 | 2003-04-18 | Low temp sintering method for surface porous pipe |
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| CN (1) | CN1188236C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653003A (en) * | 2012-05-09 | 2012-09-05 | 安泰科技股份有限公司 | Method for forming porous metal layer on pipe wall of heat exchange pipe |
| CN103759567A (en) * | 2014-01-24 | 2014-04-30 | 宋荣凯 | Copper pipe for evaporator and manufacturing method of copper pipe |
| CN103769005A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Tubular fixed bed reactor |
| CN103773413A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Method for producing base oil of lubricating oil |
| CN103773414A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Method for producing clean diesel by hydrogen and carbon monoxide |
| CN104263993A (en) * | 2014-09-04 | 2015-01-07 | 北京广厦环能科技有限公司 | Metal alloy material and application thereof |
| CN105033270A (en) * | 2015-08-18 | 2015-11-11 | 昆山德泰新材料科技有限公司 | Preparation method of porous copper-tin alloy powder |
| CN110242544A (en) * | 2019-06-20 | 2019-09-17 | 北京机械设备研究所 | Hot-air cooling device, cooling means and miniature super high pressurized air compressor |
-
2003
- 2003-04-18 CN CNB031164811A patent/CN1188236C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102653003A (en) * | 2012-05-09 | 2012-09-05 | 安泰科技股份有限公司 | Method for forming porous metal layer on pipe wall of heat exchange pipe |
| CN102653003B (en) * | 2012-05-09 | 2015-01-21 | 安泰科技股份有限公司 | Method for forming porous metal layer on pipe wall of heat exchange pipe |
| CN103769005A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Tubular fixed bed reactor |
| CN103773413A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Method for producing base oil of lubricating oil |
| CN103773414A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Method for producing clean diesel by hydrogen and carbon monoxide |
| CN103773413B (en) * | 2012-10-25 | 2016-01-20 | 中国石油化工股份有限公司 | A kind of method of producing lubricant base |
| CN103773414B (en) * | 2012-10-25 | 2016-01-20 | 中国石油化工股份有限公司 | A kind of method of being produced clean diesel by hydrogen and carbon monoxide |
| CN103759567A (en) * | 2014-01-24 | 2014-04-30 | 宋荣凯 | Copper pipe for evaporator and manufacturing method of copper pipe |
| CN104263993A (en) * | 2014-09-04 | 2015-01-07 | 北京广厦环能科技有限公司 | Metal alloy material and application thereof |
| CN105033270A (en) * | 2015-08-18 | 2015-11-11 | 昆山德泰新材料科技有限公司 | Preparation method of porous copper-tin alloy powder |
| CN110242544A (en) * | 2019-06-20 | 2019-09-17 | 北京机械设备研究所 | Hot-air cooling device, cooling means and miniature super high pressurized air compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1188236C (en) | 2005-02-09 |
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