CN102061432B - Aluminum layer heat treatment process for acoustic board - Google Patents
Aluminum layer heat treatment process for acoustic board Download PDFInfo
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- CN102061432B CN102061432B CN 201010597193 CN201010597193A CN102061432B CN 102061432 B CN102061432 B CN 102061432B CN 201010597193 CN201010597193 CN 201010597193 CN 201010597193 A CN201010597193 A CN 201010597193A CN 102061432 B CN102061432 B CN 102061432B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 119
- 238000010438 heat treatment Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000004411 aluminium Substances 0.000 claims description 81
- 238000003475 lamination Methods 0.000 claims description 72
- 238000010792 warming Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 16
- 238000005096 rolling process Methods 0.000 abstract description 4
- 238000004321 preservation Methods 0.000 abstract 3
- 238000007669 thermal treatment Methods 0.000 description 18
- 239000004744 fabric Substances 0.000 description 7
- 239000005030 aluminium foil Substances 0.000 description 6
- -1 thickness 0.02mm Substances 0.000 description 6
- 239000011358 absorbing material Substances 0.000 description 5
- 238000005336 cracking Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000009747 swallowing Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Furnace Details (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention relates to an aluminum layer heat treatment process for an acoustic board, comprising three stages of temperature rise, heat preservation and cooling. The aluminum layer heat treatment process is characterized by comprising the following steps of: (1) uncoiling and cutting a thin aluminum layer, stacking the cut thin aluminum layers, placing the stacked thin aluminum layers into a heat treatment furnace and allowing the aluminum layer to raise the temperature along the maximum power of a furnace to be 290-480DEG C; (2) carrying out the heat preservation on the thin aluminum layer subjected to temperature rise for 30-60 minutes; and (3) cooling the thin aluminum layer subjected to the heat preservation in the step (2) along the furnace to be 130-160DEG C and opening a furnace door for air cooling, reducing the strength and the elongation percentage of the material and softening the thin aluminum layer so as to meet the requirements that the thin aluminum layer is extruded by an aluminum plate net in the rolling press process to naturally crack and the sound wave can transmit through.
Description
Technical field
The present invention relates to the metallic substance thermal treatment process, specifically, relate to aluminum layer heat treatment process.
Background technology
Substation's (current conversion station) noise problem is the focus that peripheral resident complains to environmental administration always.Along with the popularization of extra-high voltage electric transmission and transformation technology, the substation supporting with it (current conversion station) noise problem becomes than in the past more serious, and causes and complain to the higher authorities about an injustice and request fair settlement and Mass disturbance and day sharp increase.
At present, China substation (current conversion station) noise is mainly produced by transformer, reactor, wave filter and blower fan cooling apparatus.Fan noise adopts traditional acoustic damping materials and measure effectively to be administered take high-frequency noises as main.Yet the medium and low frequency electromagnetic noise of the noise that transformer, reactor and wave filter produce in the 63-500Hz octave scope is as main.From research management experience in the past, this Middle and low frequency noise wavelength is longer, slow with range attenuation, strong to ordinarily resident's building penetration power, adopt traditional acoustic damping materials and sound insulation measure will be difficult to reach low-frequency noise emission limit in new promulgation GB12348-2008 standard.Even take generally to use at present acoustic damping materials and measure preferably, apart from the resident far away of substation, its influence of noise that is subject at home still can surpass the new national standard limit value of promulgating.
Domesticly adopt at present extensively the improvement that absorbs sound of traditional sound-absorbing material, as rock wool, glass wool, account for more than 90% of whole sound-absorbing material shares on actual usage quantity.These sound-absorbing materials have good sound absorbing capabilities in the medium-high frequency section, but lower at the low-frequency range sound absorption coefficient; But this class sound-absorbing material also exists weathering resistance poor, the characteristics such as easy aging contaminate environment, and along with the growth of active time, the rock wool glass wool sound absorbing capabilities that makes moist sharply descends.
Investigation by substation self military service characteristics as can be known, it is as follows that the required sound-absorbing material of substation's noise abatement should possess performance: have certain physical strength; Has good acoustically effective for medium and low frequency; The climate environmental influence, do not descend because of moist at the regional sound absorption coefficient of high humidity; Heat-transfer effect is good, is beneficial to equipment cooling; Service life is long, is difficult for ageing failure; Safety and environmental protection is easy to reclaim; Quality is little, is convenient to mounting arrangements; The Integrated using cost is low.
And the aluminum fabric acoustic absorption strength of materials is high, weatherproof, and heat transfer efficiency is high, and is good for the medium and low frequency sound absorbing capabilities, reclaims convenient pollution-free; Just in time can satisfy above-mentioned service demand, at present in Japanese traffic, building field widespread use; Also use to some extent in the part building at home; But due to the higher reason of its cost, can't be widely used in more wide field, domestic existing part producer begins to produce the aluminum fiber acoustic board with similar performance, but also has certain gap on technology controlling and process: as inhomogeneous in the heat treatment furnace interior temperature distribution, cause aluminium tissue odds even, thereby cause hardness inhomogeneous; Hardness Control, as the Hardness Control out of true, very easily affect the combination of layers of material for another example, because the combination of layers of material is the result of viscous deformation, therefore hardness is larger on knot and property impact.
aluminum fiber acoustic board mainly is comprised of two-layer aluminium expanded sheets, one deck aluminum fiber felt, the thin aluminium lamination of one deck, and wherein thin aluminium lamination technology controlling and process is comparatively strict, its major requirement aluminium lamination is slim, and intensity is low, plasticity is low, and the extruding by aluminium expanded sheets in rolling process can natural cracking, satisfies the requirement that sound wave sees through, thin aluminium lamination forms aluminium ingot by repeatedly roll extrusion is rolling, middle by repeatedly thermal treatment, satisfy processing request, the finished product are removed rolling oil after processing by surface heat, after removing certain stress, packing is sold, but its intensity is still too high for the preparation acoustic board, need carry out further thermal treatment, by thermal treatment, can reach the purpose of softening thin aluminium lamination, by theory as can be known, after viscous deformation, the recrystallization temperature of aluminium is 260～300 ℃, and thermal treatment temp is more than 300 ℃, occur without Recrystallization nucleation, swallowing and continue and growing up of crystal grain only occurs, fix on this interval as thermal treatment temp, material its intensity after heat treatment, hardness descends, but plasticity is substantially unchanged, more than 450 ℃, grain-size is substantially without considerable change, if heat-treat in this temperature, after material heat treatment, intensity, hardness descend, and plasticity improves, along with thermal treatment temp rises, respective change all occurs in aluminium lamination intensity and unit elongation, intensity, hardness rise with the thermal treatment ceiling temperature and reduce, and plasticity rises with the thermal treatment ceiling temperature and falls after rising, but at present rational treatment temp there is no final conclusion.
Summary of the invention
The object of the invention is in view of the foregoing defects the prior art has, a kind of aluminum layer heat treatment process for acoustic board is provided, thin aluminium lamination through thermal treatment process, is reduced intensity, the reduction material unit elongation of material, softening thin aluminium lamination; Extruding by aluminium expanded sheets can natural cracking in rolling process to satisfy thin aluminium lamination, satisfies the requirement that sound wave sees through.
A kind of aluminum layer heat treatment process for acoustic board provided by the invention comprises intensification, insulation, cooling three phases, and improvements are:
1) with thin aluminium lamination uncoiling cutting, with the stacked placement of thin aluminium lamination that cuts, then insert heat treatment furnace, aluminium lamination heats up with the stove peak power, is warming up to 290-480 ℃;
2) to step 1) aluminium lamination after heating up is incubated, and is incubated 30-60 minute;
3) with step 2) aluminium lamination furnace cooling after insulation, can open the fire door air cooling after being cooled to 130-160 ℃.
The provided by the invention first preferred aluminum layer heat treatment process for acoustic board, the maximum heat-up rate of described heat treatment furnace is greater than 1 ℃/s.
The provided by the invention second preferred aluminum layer heat treatment process for acoustic board, described heat treatment furnace has mixed wind system, and its space temperature variation is not more than positive and negative 5 ℃.
The provided by the invention the 3rd preferred aluminum layer heat treatment process for acoustic board, described thin aluminum layer thickness is 0.02-0.03mm.
The provided by the invention the 4th preferred aluminum layer heat treatment process for acoustic board, described thin aluminium lamination is commercially available thin aluminium lamination.
The provided by the invention the 5th preferred aluminum layer heat treatment process for acoustic board, described step 3) cooling temperature is 150 ℃.
The provided by the invention the 6th preferred aluminum layer heat treatment process for acoustic board, the described nature that is placed as is placed.
The provided by the invention the 7th preferred aluminum layer heat treatment process for acoustic board, described heat treatment furnace are PID temperature control three-temperature-zone heat treatment furnace.
With thin aluminium lamination uncoiling cutting commercially available or self-control thickness 0.02-0.03mm, thickness and select namely can to guarantee some strength, can guarantee again thin aluminium lamination work in-process natural cracking, thickness is less than 0.02mm, and the intensity of thin aluminium lamination is low, when intensity is hanged down, not very convenient for the installation of acoustic board and transportation, and during greater than 0.03mm, because aluminium lamination is blocked up, comparatively fine and close between aluminium lamination, natural cracking easily occurs in the course of processing;
With the stacked placement of thin aluminium lamination that cuts, naturally place not compacting, because in a single day aluminium lamination is compacted, because the material of aluminium lamination own is thinner, in case compacting, be easy to adhesion between aluminium lamination and aluminium lamination, cause making each several part heat transfer degree inhomogeneous in heat treated process, thereby affect whole structure.
During intensification 290-480 ℃ of temperature, this temperature covers from the recrystallize starting temperature to the grain growth temperature, and the possible temperature range of institute of intensity lower hardness namely may occur; Be incubated 30-60 minute, this soaking time can guarantee effectively that the recrystallize of material structure and grain growth can fully complete; Cooling ceiling temperature is 160 ℃, because 160 ℃ is the ceiling temperature of blow-on, lower than this temperature, aluminium can not harden because of chilling.
The whole thin aluminium lamination that falls is placed into heat treatment furnace, heat treatment furnace requires as having the mixed wind system heat treatment furnace of blower fan, and blower fan is opened all the time in heat-processed, guarantees that furnace temperature is even, body of heater is preferably PID temperature control three-temperature-zone heat treatment furnace, and the furnace temperature uniformity coefficient is no more than positive and negative 5 degree;
Aluminium lamination heats up with stove, is incubated after the arrival preset temperature; After insulation for some time, furnace cooling is cooled to 130-160 ℃, can open the fire door air cooling after being preferably 150 ℃; After thin aluminium lamination is cooled to room temperature, can take out thin aluminium lamination, can not thin aluminium lamination is folding in transport process, to avoid viscous deformation, cause unnecessary sclerosis.
Aluminum layer heat treatment process for acoustic board provided by the invention, being applicable to all has the thermal treatment that reduces hardness, reduction intensity, reduces by 0.02～0.03mm thin thickness aluminium lamination of plasticity requirement.
Compared with prior art, a kind of aluminum layer heat treatment process for acoustic board provided by the invention has the following advantages:
1, aluminium lamination hardness is effectively controlled in the selection of 0.02～0.03mm thickness, satisfies its work in-process intensity and the requirement of natural cracking can not occur;
2, determined thermal treatment temp in its thermal treatment process for the aluminium lamination of specific thicknesses, this temperature covers from the recrystallize starting temperature to the grain growth temperature, the possible temperature range of institute of intensity lower hardness namely may occur, and reduces the material unit elongation, softening thin aluminium lamination;
3, insulation is 30-60 minute, and this soaking time can guarantee effectively that the recrystallize of material structure and grain growth can fully complete;
4, the ceiling temperature of cooling 160 ℃-blow-on, in this temperature range, aluminium can well harden because of chilling;
5, reduce the intensity of material, softening thin aluminium lamination; And phenomenon that can fracture in the process of processing can effectively satisfy the requirement that sound wave sees through again;
6, the aluminium low price that adopts, cost is low, conveniently carries out the scale operation manufacturing;
7, heat up to select 290-480 ℃ of temperature, solved the defective that thermal treatment temp that the thermal treatment process of the acoustic board of thin aluminium lamination exists always can not be come to a conclusion.
Embodiment
Below in conjunction with embodiment, a kind of aluminum layer heat treatment process for acoustic board provided by the invention is done further more detailed description;
Embodiment 1
The thin aluminium lamination of the present embodiment is commercially available aluminium foil, thickness 0.02mm, fabric width 0.6m; Adopting heat treatment furnace is the low-temperature heat treatment stove, and 700 ℃ of maximum operation (service) temperatures have mixed wind system, adopts PID three-temperature-zone accurate temperature controlling, and space temperature variation equals negative 5 ℃; The maximum heat-up rate of heat treatment furnace is 1 ℃/s.
With commercially available thin aluminium lamination uncoiling, being cut to needs specification, with the stacked placement naturally of the thin aluminium lamination that cuts, not compacting; The whole thin aluminium lamination that falls is placed into heat treatment furnace; Aluminium lamination heats up with the stove peak power; Be incubated after being warming up to 290 ℃; Be incubated after 30 minutes, furnace cooling can be opened the fire door air cooling after being cooled to 150 ℃.
Embodiment 2
The thin aluminium lamination of the present embodiment is commercially available aluminium foil, thickness 0.03mm, fabric width 0.5m; Adopting heat treatment furnace is the low-temperature heat treatment stove, and 480 ℃ of maximum operation (service) temperatures have mixed wind system, adopts PID three-temperature-zone accurate temperature controlling, and space temperature variation equals positive 5 ℃; The maximum heat-up rate of heat treatment furnace is 2 ℃/s.
With commercially available thin aluminium lamination uncoiling, being cut to needs specification, the thin aluminium lamination that cuts is placed naturally not compacting; The whole thin aluminium lamination that falls is placed into heat treatment furnace; Aluminium lamination heats up with the stove peak power; Be incubated after being warming up to 300 ℃; Be incubated after 60 minutes, furnace cooling can be opened the fire door air cooling after being cooled to 130 ℃.
Embodiment 3
The thin aluminium lamination of the present embodiment is commercially available aluminium foil, thickness 0.02mm, fabric width 0.4m; Adopting heat treatment furnace is the low-temperature heat treatment stove, and 480 ℃ of maximum operation (service) temperatures have mixed wind system, adopts PID three-temperature-zone accurate temperature controlling, and space temperature variation equals positive 5 ℃; The maximum heat-up rate of heat treatment furnace is 1.2 ℃/s.
With commercially available thin aluminium lamination uncoiling, being cut to needs specification, the thin aluminium lamination that cuts is placed naturally not compacting; The whole thin aluminium lamination that falls is placed into heat treatment furnace; Aluminium lamination heats up with the stove peak power; Be incubated after being warming up to 330 ℃; Be incubated after 30 minutes, furnace cooling can be opened the fire door air cooling after being cooled to 160 ℃;
Embodiment 4
The thin aluminium lamination of the present embodiment is commercially available aluminium foil, thickness 0.03mm, fabric width 0.4m; Adopting heat treatment furnace is the low-temperature heat treatment stove, and 480 ℃ of maximum operation (service) temperatures have mixed wind system, adopts PID three-temperature-zone accurate temperature controlling, and space temperature variation equals positive 5 ℃; The maximum heat-up rate of heat treatment furnace is 1.3 ℃/s.
With commercially available thin aluminium lamination uncoiling, being cut to needs specification, the thin aluminium lamination that cuts is placed naturally not compacting; The whole thin aluminium lamination that falls is placed into heat treatment furnace; Aluminium lamination heats up with the stove peak power; Be incubated after being warming up to 400 ℃; Be incubated after 30 minutes, furnace cooling can be opened the fire door air cooling after being cooled to 150 ℃.
Embodiment 5
The thin aluminium lamination of the present embodiment is commercially available aluminium foil, thickness 0.02mm, fabric width 0.4m; Adopting heat treatment furnace is the low-temperature heat treatment stove, and 480 ℃ of maximum operation (service) temperatures have mixed wind system, adopts PID three-temperature-zone accurate temperature controlling, and space temperature variation equals positive 5 ℃; The maximum heat-up rate of heat treatment furnace is 1.1 ℃/s.
With commercially available thin aluminium lamination uncoiling, being cut to needs specification, the thin aluminium lamination that cuts is placed naturally not compacting; The whole thin aluminium lamination that falls is placed into heat treatment furnace; Aluminium lamination heats up with the stove peak power; Be incubated after being warming up to 450 ℃; Be incubated after 60 minutes, furnace cooling can be opened the fire door air cooling after being cooled to 150 ℃;
Embodiment 6
The thin aluminium lamination of the present embodiment is commercially available aluminium foil, thickness 0.025mm, fabric width 0.4m; Adopting heat treatment furnace is the low-temperature heat treatment stove, and 480 ℃ of maximum operation (service) temperatures have mixed wind system, adopts PID three-temperature-zone accurate temperature controlling, and space temperature variation equals positive 5 ℃; The maximum heat-up rate of heat treatment furnace is 1.2 ℃/s.
With commercially available thin aluminium lamination uncoiling, being cut to needs specification, the thin aluminium lamination that cuts is placed naturally not compacting; The whole thin aluminium lamination that falls is placed into heat treatment furnace; Aluminium lamination heats up with the stove peak power; Be incubated after being warming up to 480 ℃; Be incubated after 30 minutes, furnace cooling can be opened the fire door air cooling after being cooled to 150 ℃;
Effect comparison before and after the thermal treatment of table 1 above-described embodiment
| Intensity after thermal treatment (MPa) | Unit elongation after thermal treatment (%) | Bating effect | |
| Embodiment 1 | 70 | 4 | Not obvious |
| Embodiment 2 | 60 | 4 | Better |
| Embodiment 3 | 60 | 3.8 | Better |
| Embodiment 4 | 55 | 3.5 | Better |
| Embodiment 5 | 50 | 3 | Good |
| Embodiment 6 | 53 | 3.2 | Better |
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; although with reference to above-described embodiment, the present invention is had been described in detail; those of ordinary skill in the field are to be understood that: the technician still can modify or be equal to replacement the specific embodiment of the present invention after reading present specification, does not await the reply within the claim protection domain but these modifications or change all break away from the present patent application.
Claims (6)
1. an aluminum layer heat treatment process for acoustic board, comprise intensification, insulation, cooling three phases, it is characterized in that:
1) with thin aluminium lamination uncoiling cutting, with the stacked placement of thin aluminium lamination that cuts, then insert heat treatment furnace, aluminium lamination heats up with the stove peak power, is warming up to 290-480 ℃, and described thin aluminum layer thickness is 0.02-0.03mm;
2) to step 1) thin aluminium lamination after heating up is incubated, and is incubated 30-60 minute;
3) with step 2) thin aluminium lamination furnace cooling after insulation, can open the fire door air cooling after being cooled to 130-160 ℃.
2. aluminum layer heat treatment process for acoustic board according to claim 1, is characterized in that the maximum heat-up rate of described heat treatment furnace is greater than 1 ℃/s.
3. aluminum layer heat treatment process for acoustic board according to claim 1, is characterized in that described heat treatment furnace has mixed wind system, and its space temperature variation is not more than positive and negative 5 ℃.
4. aluminum layer heat treatment process for acoustic board according to claim 1, is characterized in that described step 3) cooling temperature is 150 ℃.
5. aluminum layer heat treatment process for acoustic board according to claim 1, is characterized in that the described nature placement that is placed as.
6. aluminum layer heat treatment process for acoustic board according to claim 1, is characterized in that described heat treatment furnace is PID temperature control three-temperature-zone heat treatment furnace.
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| CN 201010597193 CN102061432B (en) | 2010-12-20 | 2010-12-20 | Aluminum layer heat treatment process for acoustic board |
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| CN 201010597193 CN102061432B (en) | 2010-12-20 | 2010-12-20 | Aluminum layer heat treatment process for acoustic board |
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| CN102061432B true CN102061432B (en) | 2013-11-06 |
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| CN102842303B (en) * | 2011-06-23 | 2015-01-21 | 中国电力科学研究院 | Microporous-fiber composite sound absorbing board |
| CN102605302A (en) * | 2011-12-20 | 2012-07-25 | 金华电业局 | Thermal treatment method for aluminum plate net of front panel of acoustic board |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1973056A (en) * | 2004-05-26 | 2007-05-30 | 克里斯铝轧制品有限公司 | Process for producing an aluminium alloy brazing sheet, aluminium alloy brazing sheet |
| CN101774126A (en) * | 2009-12-29 | 2010-07-14 | 江苏常铝铝业股份有限公司 | Manufacturing method of aluminium alloy compound plate and strip for power station air cooling island and product thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1973056A (en) * | 2004-05-26 | 2007-05-30 | 克里斯铝轧制品有限公司 | Process for producing an aluminium alloy brazing sheet, aluminium alloy brazing sheet |
| CN101774126A (en) * | 2009-12-29 | 2010-07-14 | 江苏常铝铝业股份有限公司 | Manufacturing method of aluminium alloy compound plate and strip for power station air cooling island and product thereof |
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