CN105349766A - Copper strip cover-type furnace annealing technology - Google Patents
Copper strip cover-type furnace annealing technology Download PDFInfo
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- CN105349766A CN105349766A CN201510949071.0A CN201510949071A CN105349766A CN 105349766 A CN105349766 A CN 105349766A CN 201510949071 A CN201510949071 A CN 201510949071A CN 105349766 A CN105349766 A CN 105349766A
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- inner cover
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
- C21D9/667—Multi-station furnaces
- C21D9/67—Multi-station furnaces adapted for treating the charge in vacuum or special atmosphere
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- Engineering & Computer Science (AREA)
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- Crystallography & Structural Chemistry (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
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Abstract
The invention discloses a copper strip cover-type furnace annealing technology and belongs to the field of heat treatment of metal materials. The technology comprises the following steps: 1, sealing and locking a cover-type furnace; 2, filling the cover-type furnace with safe gas; 3, carrying out a heating stage of the cover-type furnace, wherein the heating time is 4-5 h so that the temperature in an inner cover reaches 420-450 DEG C, and protective gas is introduced continuously in the heating process; 4 carrying out a heat preservation stage of the cover-type furnace; 5, carrying out a cooling stage of the cover-type furnace, wherein air cooling is carried out before water cooling, and protective gas is introduced continuously in the air cooling and water cooling stages; 6, filling the cover-type furnace with safe gas; and 7, unlocking the cover-type furnace and taking out a product. Through the adoption of the technical scheme of the invention, an annealed copper strip with better surface quality and more stable properties can be obtained, and the consumption of the protective gas resource in the annealing process can be reduced so as to reduce the production cost and improve the productivity effect.
Description
Technical field
The present invention relates to technical field of metal material heat treatment, more particularly, relate to a kind of copper strips batch annealing.
Background technology
Copper strips material needs repeatedly to anneal in the course of processing, mainly contains two basic roles, and one is eliminate the sclerosis and unrelieved stress that produce in the course of processing, softener material, improves plasticity, is convenient to further processing; Two is change materials microstructure structure, the grain fineness number required for acquisition and grain orientation.Current employing cover annealing is one of method commonly used in the copper strips course of processing.
Cover annealing belongs to the clean annealing of cold rolling rear copper strips, annealing process must ensure that in production, copper strip roll interlayer is non-caked, there is not oxidation in surface, copper strips must be made to be placed among protection gas without decarburization, non-oxidation when realizing annealing copper strip to anneal, and make the pressure in protective guard meet processing requirement; Concrete annealing process is by multireel copper strips, after requiring to put into bell furnace according to certain step, carry out heating under the protection of privacy protection gas, be incubated, cool, the performance of copper strips is changed, meets the performance requriements again processed and use, so in the production of cover annealing, the two large factors that mainly contain affect production cost, one is energy cost, mainly power consumption cost, so part heating uses Sweet natural gas; Two is protection gas costs; because just can not make copper strips that oxidation and the unequal phenomenon of performance occur need constantly to be filled with protection gas in heating, insulation and process of cooling under; therefore whether the annealing process arrangement of bell furnace is reasonable; whether program is proper, is related to the annealing quality of copper strips, energy-saving and cost-reducing and production safety.
About the process modification of cover annealing, in prior art, existing Patents is open, such as Chinese Patent Application No. 2012103915516, the applying date is on October 16th, 2012, invention and created name is: a kind of batch annealing method, comprise table charging, dress inner cover and inner cover clamping, through once vacuumizing, fill protection gas and purging, dress heating mantles and igniting, heating and samming, band heating mantles cools and removes heating mantles, radiation cooling and dress cooling cowl, air-cooled and spraying cooling, remove cooling cowl, secondary vacuum pumping, inner cover unclamps and removes inner cover, table feeding.The technical process of this application case is reasonable; make cold rolled sheet annealing stable mechanical property; but this application case does not make improvement to the mode that is filled with of protection gas; make protection gas consumption in annealing process large and optimization cannot be made to the annealing quality of cold rolled sheet; add production cost, still require further improvement.
Summary of the invention
the technical problem that invention will solve
The present invention is directed in prior art and in batch annealing, protect the deficiency that gas usage quantity is large, production cost is higher; provide a kind of copper strips batch annealing; the use of protection gas is reduced in a large number while can be implemented in annealing copper strip effect; thus reduction production cost, improve productivity effect.
technical scheme
For achieving the above object, technical scheme provided by the invention is:
A kind of copper strips batch annealing of the present invention, comprises the following steps:
Step one: the sealing locking of bell furnace;
Described bell furnace comprises table and Inner cover, and be provided with blower fan bottom table, be provided with back up pad above table, this back up pad offers through hole, the fan blade of blower fan is positioned at below this through hole; Copper strips to be annealed is placed in above-mentioned back up pad, then Inner is covered on the outside of copper strips, and the flange disk body of Inner cover bottom and table are locked, keep the sealed state in Inner cover;
Step 2: be filled with substitute in bell furnace;
After step one terminates, first once vacuumize process to Inner cover, then in Inner cover, be filled with substitute, this substitute is nitrogen;
Step 3: the heating phase of bell furnace;
After step 2 terminates, heating mantles is covered on the outside of Inner cover, in heating mantles, be provided with resistance wire; The table of described bell furnace is also provided with inlet pipe and vapor pipe, when heating mantles starts to heat, start the blower fan bottom table, then in Inner cover, protection gas is filled with by this inlet pipe, the heat-up time of bell furnace is 4 ~ 4.5h, during Inner is covered, temperature reaches 420 ~ 450 DEG C, protects gas to continue to be filled with in heat-processed;
Step 4: the holding stage of bell furnace;
After step 3 terminates, carry out isothermal holding to bell furnace, soaking time is 5 ~ 5.5h, and holding stage continues to be filled with protection gas;
Step 5: the cooling stages of bell furnace;
After step 4 terminates, heating mantles is removed, cooling cowl in Inner cover outside mask, fan and spray equipment is provided with in this cooling cowl, first fan the carries out 4 ~ 4.5h air-cooled stage to Inner cover is started, during Inner is covered, temperature is cooled to 250 ~ 300 DEG C, and air-cooled end starts spray equipment carries out 4.5 ~ 5.5h water-cooled to Inner cover afterwards, and during Inner is covered, temperature is cooled to 60 ~ 80 DEG C; Air-cooled and water cooling stage all continues to be filled with protection gas, and water-cooled terminates rear stopping and being filled with protection gas;
Step 6: be filled with substitute in bell furnace;
After step 5 terminates, remove cooling cowl, the blower fan bottom table cut out, secondary vacuum pumping process is carried out to Inner cover, and then be filled with substitute Inner is covered in air pressure stop inflation when reaching normal pressure, this substitute is nitrogen;
Step 7: unlocked by bell furnace, takes out product;
After step 6 terminates, Inner cover is unlocked with table, then Inner cover is removed, take out copper strips.
Further, hydraulic locking cylinder is passed through between the flange disk body in step one bottom Inner cover and table.
Further, described hydro-cylinder is provided with eight, is evenly distributed on the surrounding of table.
Further, in Inner cover, nitrogen is filled with until stop inflation when pressure is malleation 108 ~ 110Pa in step 2.
Further, described protection gas is the mixed gas of hydrogen and nitrogen, and wherein the volume percent of hydrogen is 75%, and the volume percent of nitrogen is 25%.
Further, described vapor pipe is provided with pressure trip switch.
Further, when the pressure in Inner cover is higher than malleation 115Pa, the switch of described vapor pipe is opened automatically, and the protection gas in being covered by Inner is discharged, and now protects being filled with of gas to carry out with discharging in Inner cover simultaneously; When the pressure in Inner cover is lower than malleation 110Pa, the switch of described vapor pipe cuts out automatically, and that now only carries out protection gas in Inner cover is filled with process.
beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, there is following unusual effect:
(1) in the present invention, Inner cover is adopt hydraulic locking cylinder with table, and hydro-cylinder is provided with eight, be evenly distributed on the surrounding of table, the flange disk body of Inner cover bottom is tightly pressed on table by the piston rod of hydro-cylinder, eight hydro-cylinders operationally synchronization action, guarantee that the locking force of each point is consistent, adopt constant pressure to control to hydro-cylinder simultaneously, the phenomenon that locking force will be caused inconsistent because of the change of Inner internal mask pressure, thus ensure that table and Inner cover stopping property strengthen, for subsequent anneal process insufflation gas provides security & performance guarantee.
(2) in the present invention, inlet pipe is provided with under meter, at any time the charge of Control protection gas, and during copper strips heating, shielding gas flow amount adopts 8 ~ 10Nm
3/ h, arranging annealing process of this high flow is very favourable, and shielding gas flow amount is high; the content of protection gas in Inner cover is sufficient; form the zone of heating that one deck circulates, to copper strips rapid heating, its internal crystallization quality and crystallization degree are improved; promote that grain uniformity is grown up; improve copper strips dense internal organization degree, reduce defect concentration, improve crystalline texture; also accelerate annealing speed simultaneously, improve production efficiency.
(3) in the present invention at whole annealing stage, when the pressure in Inner cover is elevated to malleation 115Pa, pressure trip switch that vapor pipe is arranged can be opened automatically, is discharged by protection gas, and being now filled with of protection gas is carried out with discharging simultaneously; This protection gas fills while the annealing way arranged, it is the surface quality in order to improve copper strips further, the carbonizations gradually in heat-processed such as dirty, greasy dirt, the impurity of copper strip surface, dirty after carbonization incorporates in protection gas, floating a large amount of dust during Inner can be made to cover; The unlatching of vapor pipe then can effectively by the dirty dust after carbonization etc. along with protection gas is discharged together, keep the cleaning in Inner cover, carbonization material is discharged the surface quality not only improving copper strips simultaneously, the degree of depth being also conducive to copper strips is heated.
Accompanying drawing explanation
Fig. 1 is bell furnace heated condition figure in the present invention.
Label declaration in schematic diagram: 1, table; 2, blower fan; 3, Inner cover; 4, heating mantles; 5, copper strips; 6, hydro-cylinder.
Embodiment
For understanding content of the present invention further, below in conjunction with drawings and Examples, the present invention is described in detail.
embodiment 1
As shown in Figure 1, a kind of copper strips batch annealing of the present embodiment, comprises the following steps:
Step one: the sealing locking of bell furnace;
Bell furnace comprises table 1 and Inner cover 3, and be provided with blower fan 2 bottom table 1, be provided with back up pad above table 1, this back up pad offers through hole, the fan blade of blower fan 2 is positioned at below this through hole, copper strips 5 to be annealed is placed on the supporting plate, then Inner cover 3 is covered on the outside of copper strips 5, and the flange disk body bottom Inner cover 3 and table 1 are locked, keep the sealed state in Inner cover 3, be specially Inner cover 3 bottom flange disk body and table 1 be adopt hydro-cylinder 6 to lock, and hydro-cylinder 6 is provided with eight, be evenly distributed on the surrounding of table 1, flange disk body bottom Inner cover 3 is tightly pressed on table 1 by the piston rod of hydro-cylinder 6, eight hydro-cylinders 6 operationally synchronization action, guarantee that the locking force of each point is consistent, adopt constant pressure to control to hydro-cylinder 6 simultaneously, the phenomenon that locking force will be caused inconsistent because Inner covers 3 internal pressure changes, thus ensure that table 1 and Inner cover 3 stopping propertys and strengthen, for subsequent anneal process insufflation gas provides security & performance guarantee.
Step 2: be filled with substitute in bell furnace;
After step one terminates, first once vacuumize process to Inner cover 3, then in Inner cover 3, be filled with substitute, this substitute is nitrogen; Stopping inflation when pressure reaches malleation 108 ~ 110Pa in Inner cover 3, is specifically malleation 110Pa in the present embodiment; It is necessary for now belonging to slight positive pressure state in Inner cover 3, if the too high Inner of causing of pressure covers 3 seriously stressed in Inner cover 3, be unfavorable for the life-time service of Inner cover 3, if pressure is lower than normal pressure, entering of extraneous air can be caused, Inner is covered in 3 and is mixed with air, affect subsequent anneal quality.
Step 3: the heating phase of bell furnace;
After step 2 terminates, heating mantles 4 is covered on the outside of Inner cover 3, in heating mantles 4, be provided with resistance wire, the table 1 of bell furnace is also provided with inlet pipe and vapor pipe, wherein inlet pipe is provided with under meter, vapor pipe is provided with pressure trip switch, when heating mantles 4 starts to heat, start the blower fan 2 bottom table 1, then in Inner cover 3, protection gas is filled with by this inlet pipe, protection gas described in the present embodiment all refers to the mixed gas of hydrogen and nitrogen, wherein the volume percent of hydrogen is 75%, the volume percent of nitrogen is 25%, gas is protected to be driven by blower fan 2 during heating, the shielding gas flow of steady flow is formed in Inner cover 3, be looped around the surrounding of copper strips 5, protection gas serves as heat-transfer medium simultaneously, the heat that heating mantles 4 produces passes to protection gas, protection gas transfers heat to parcel copper strips 5 therein again, thus copper strips 5 is heated anneal, in the protection gas adopted in the present embodiment, hydrogen content is higher, hydrogen density is little, kinetic viscosity is little, reductibility is strong, fast in the drive current downflow of blower fan 2, heat conduction is good, it is more even that this indirect heating manner makes copper strips 5 be heated, and thermal histories is continual and steady, the Annealing Property being conducive to copper strips 5 is stablized, heat-up time is 4h, makes Inner cover temperature in 3 and reaches 420 DEG C, protect gas to continue to be filled with in heat-processed.
It should be noted that, the Annealing Property of the mode that is filled with on copper strips 5 of protection gas has remarkably influenced, whether entering of protection gas be even, the whether sufficient thermal histories all directly affecting copper strips 5 of inlet, the uneven meeting of protection gas causes copper strips 5 to be heated inequality, thus make copper strips 5 tissue odds, there is difference in each several part hardness, unstable properties; The inadequate copper strips 5 that can cause again of protection gas is heated slowly, and extending heating time, reduces production efficiency.In order to ensure to protect the even of gas and content simultaneously; invention technician adopts the mode of flow to control protection gas, inlet pipe is provided with under meter, at any time the charge of Control protection gas; technician, by theoretical analysis and lot of experiment validation, finds that at flow be 8 ~ 10Nm
3during/h, annealing effect is best, and specifically shielding gas flow amount is 8Nm in the present embodiment
3/ h, arranging annealing process of this high flow is very favourable, and shielding gas flow amount is high; the content of protection gas in Inner cover 3 is sufficient; form the zone of heating that one deck circulates, to copper strips 5 rapid heating, its internal crystallization quality and crystallization degree are improved; promote that grain uniformity is grown up; improve copper strips 5 dense internal organization degree, reduce defect concentration, improve crystalline texture; also accelerate annealing speed simultaneously, improve production efficiency.
Along with protection gas continues to be filled with, the pressure in Inner cover 3 can constantly raise, and when pressure is elevated to malleation 115Pa, the pressure trip switch that vapor pipe is arranged can be opened automatically, is discharged by protection gas, and being now filled with of protection gas is carried out with discharging simultaneously; The process that in Inner cover 3, pressure is elevated to malleation 115Pa gradually can promote copper strips 5 superficial deposit rate reduction, and grain orientation reaches unanimity, and roughness is reduced, and copper strips 5 surface is smooth-out, luminance brightness increase; Technician adopts protection gas to fill while the type of heating arranged, it is the surface quality in order to improve copper strips 5 further, the carbonizations gradually in heat-processed such as dirty, greasy dirt, the impurity on copper strips 5 surface, dirty after carbonization incorporates in protection gas, and Inner can be made to cover floating a large amount of dust in 3; The unlatching of vapor pipe then can effectively by the dirty dust after carbonization etc. along with protection gas is discharged together, keep the cleaning in Inner cover 3, carbonization material is discharged the surface quality not only improving copper strips 5 simultaneously, also the degree of depth being conducive to copper strips 5 is heated, annealing process is thoroughly carried out, inner crystallization degree increases, and the structure property of copper strips 5 is more stable; Along with the unlatching of vapor pipe, pressure in Inner cover 3 can suitably decline, when pressure returns to below malleation 110Pa, the pressure trip switch of vapor pipe can cut out again automatically, what now only have protection gas is filled with process, when the pressure in Inner cover 3 is elevated to malleation 115Pa once more, repeat said process; Copper strips 5 is heated in the process gradually, with the obvious advantage.
Step 4: the holding stage of bell furnace;
After step 3 terminates, isothermal holding is carried out to bell furnace, soaking time is 5h, holding stage still continues to be filled with protection gas, holding stage is to ensure thoroughly being heated of copper strips 5, technician finds that the traffic demand of shielding gas flow amount demand now and heating period changes to some extent, temperature now in Inner cover 3 has risen to and has required temperature, only need to keep temperature, the content of protection gas can suitably reduce, but the too low circulating current that can cause again of protection Gas content is not enough, be difficult to make copper strips 5 continue be heated completely and extend soaking time, technician finally finds to control at 5 ~ 6Nm in this stage shielding gas flow amount
3/ h is best, specifically adopts shielding gas flow amount to be 5Nm in the present embodiment
3/ h, and it is identical with heat-processed to protect gas to be filled with mode, when the pressure in Inner cover 3 rises to malleation 115Pa, the pressure trip switch that vapor pipe is arranged can be opened automatically, protection gas is discharged together with the dirty of carbonization, improves the surface quality of copper strips 5 further, when pressure returns to below malleation 110Pa, the pressure trip switch of vapor pipe can cut out again automatically, and protection gas circulates at copper strips 5 periphery, ensures that it is heated completely.
Step 5: the cooling stages of bell furnace;
After step 4 terminates, heating mantles 4 is removed, cooling cowl in 3 outside mask is covered at Inner, fan and spray equipment is provided with in this cooling cowl, first fan the carries out 4h air-cooled stage to Inner cover 3 is started, make Inner cover temperature in 3 and be cooled to 250 DEG C, air-cooled end starts spray equipment carries out 4.5h water-cooled to Inner cover 3 afterwards, makes Inner cover temperature in 3 and is cooled to 60 DEG C; Air-cooled and water cooling stage still continues to be filled with protection gas; gas is now protected to serve as heat-eliminating medium; copper strips 5 is cooled gradually; the cooling of copper strips 5 can not experience abrupt temperature drop process; the phenomenon that plasticity and toughness reduce appears that hardness increases, in the too fast copper strips 5 that may cause on the contrary of speed of cooling, and technician is the cooling performance ensureing copper strips 5; shielding gas flow amount adjusted further, air-cooled stage shielding gas flow amount is 4-5Nm
3/ h, water cooling stage shielding gas flow amount is 2-3Nm
3/ h, specifically shielding gas flow amount of air-cooled stage controls at 4Nm in the present embodiment
3/ h, water cooling stage shielding gas flow amount controls as 2Nm
3/ h, and it is the same to protect gas to be filled with mode, when the pressure in Inner cover 3 rises to malleation 115Pa, the pressure trip switch that vapor pipe is arranged can be opened automatically, by protecting gas to discharge together with the dirty of carbonization, improves the surface quality of copper strips 5 further; When pressure returns to below 110Pa, the pressure trip switch of vapor pipe can cut out again automatically; Water-cooled terminates rear stopping and being filled with protection gas; The adjustment of shielding gas flow amount in process of cooling, not only makes copper strips 5 surface cleaner, ensure that the surface quality of copper strips 5, plate shape and operational stability, additionally reduces the use of protection gas resource, reduces production cost.
Step 6: be filled with substitute in bell furnace;
After step 5 terminates, remove cooling cowl, blower fan 2 bottom table 1 cuts out, secondary vacuum pumping process is carried out to Inner cover 3, the protection gas of internal residual is extracted out, avoid hydrogen to be gathered in Inner and cover 3 tops, and then be filled with substitute (i.e. nitrogen) and Inner covered when air pressure in 3 reaches normal pressure stop inflation;
Step 7: unlocked by bell furnace, takes out product;
After step 6 terminates, Inner cover 3 is unlocked with eight hydro-cylinders on table 1, then Inner cover 3 is removed, copper strips 5 can be taken out; Adopt the technical scheme of the present embodiment not only can obtain the annealing product that surface quality is better, performance is more stable, the use of gas resource can also be protected in minimizing process, thus reduce production cost, improve productivity effect.
embodiment 2
With embodiment 1, difference is the heat-up time of bell furnace in the present embodiment is 4.2h, and Heating temperature is 430 DEG C, and the flow of heating phase protection gas (i.e. the mixed gas of hydrogen and nitrogen) is 9Nm
3/ h; The soaking time of bell furnace is 5.2h, and the flow of holding stage protection gas is 5.5Nm
3/ h; The cooling stages air-cooled time of bell furnace is 4.2h, cooling temperature to 280 DEG C, and shielding gas flow amount is 4.5Nm
3/ h, the water-cooled time is 5h, cooling temperature to 70 DEG C, and shielding gas flow amount is 2.5Nm
3/ h.
embodiment 3
With embodiment 1, difference is the heat-up time of bell furnace in the present embodiment is 4.5h, and Heating temperature is 450 DEG C, and the flow of heating phase protection gas (i.e. the mixed gas of hydrogen and nitrogen) is 10Nm
3/ h; The soaking time of bell furnace is 5.5h, and the flow of holding stage protection gas is 6Nm
3/ h; The cooling stages air-cooled time of bell furnace is 4.5h, cooling temperature to 300 DEG C, and shielding gas flow amount is 5Nm
3/ h, the water-cooled time is 5.5h, cooling temperature to 80 DEG C, and shielding gas flow amount is 3Nm
3/ h.
Schematically above be described the present invention and embodiment thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (7)
1. a copper strips batch annealing, is characterized in that, comprises the following steps:
Step one: the sealing locking of bell furnace;
Described bell furnace comprises table (1) and Inner cover (3), and table (1) bottom is provided with blower fan (2), and table (1) top is provided with back up pad, and this back up pad offers through hole, and the fan blade of blower fan (2) is positioned at below this through hole; Copper strips (5) to be annealed is placed in above-mentioned back up pad, then Inner cover (3) is covered on the outside of copper strips (5), and the flange disk body of Inner cover (3) bottom and table (1) are locked, keep the sealed state in Inner cover (3);
Step 2: be filled with substitute in bell furnace;
After step one terminates, first once vacuumize process to Inner cover (3), then in Inner cover (3), be filled with substitute, this substitute is nitrogen;
Step 3: the heating phase of bell furnace;
After step 2 terminates, heating mantles (3) is covered on the outside of Inner cover (3), heating mantles is provided with resistance wire in (4); The table (1) of described bell furnace is also provided with inlet pipe and vapor pipe, when heating mantles (3) starts to heat, start the blower fan (2) of table (1) bottom, then in Inner cover (3), protection gas is filled with by this inlet pipe, the heat-up time of bell furnace is 4 ~ 4.5h, make Inner cover temperature in (3) and reach 420 ~ 450 DEG C, in heat-processed, protect gas to continue to be filled with;
Step 4: the holding stage of bell furnace;
After step 3 terminates, carry out isothermal holding to bell furnace, soaking time is 5 ~ 5.5h, and holding stage continues to be filled with protection gas;
Step 5: the cooling stages of bell furnace;
After step 4 terminates, heating mantles (4) is removed, cooling cowl in (3) outside mask is covered at Inner, fan and spray equipment is provided with in this cooling cowl, first fan the carries out 4 ~ 4.5h air-cooled stage to Inner cover (3) is started, make Inner cover temperature in (3) and be cooled to 250 ~ 300 DEG C, air-cooled end starts spray equipment carries out 4.5 ~ 5.5h water-cooled to Inner cover (3) afterwards, makes Inner cover temperature in (3) and is cooled to 60 ~ 80 DEG C; Air-cooled and water cooling stage all continues to be filled with protection gas, and water-cooled terminates rear stopping and being filled with protection gas;
Step 6: be filled with substitute in bell furnace;
After step 5 terminates, remove cooling cowl, closed by the blower fan (2) of table (1) bottom, carry out secondary vacuum pumping process to Inner cover (3), and then be filled with substitute and Inner covered when air pressure in (3) reaches normal pressure stop inflation, this substitute is nitrogen;
Step 7: unlocked by bell furnace, takes out product;
After step 6 terminates, Inner cover (3) is unlocked with table (1), then Inner cover (3) is removed, take out copper strips (5).
2. a kind of copper strips batch annealing according to claim 1, is characterized in that: in step one, Inner is covered between the flange disk body of (3) bottom and table (1) and locked by hydro-cylinder (6).
3. a kind of copper strips batch annealing according to claim 1 and 2, is characterized in that: described hydro-cylinder (6) is provided with eight, is evenly distributed on the surrounding of table (1).
4. a kind of copper strips batch annealing according to claim 1, is characterized in that: in Inner cover (3), be filled with nitrogen until stop inflation when pressure is malleation 108 ~ 110Pa in step 2.
5. a kind of copper strips batch annealing according to claim 1, it is characterized in that: described protection gas is the mixed gas of hydrogen and nitrogen, wherein the volume percent of hydrogen is 75%, and the volume percent of nitrogen is 25%.
6. a kind of copper strips batch annealing according to claim 1 and 2, is characterized in that: described vapor pipe is provided with pressure trip switch.
7. a kind of copper strips batch annealing according to claim 6, it is characterized in that: when the pressure in Inner cover (3) is higher than malleation 115Pa, the switch of described vapor pipe is opened automatically, discharged by protection gas in Inner cover (3), now in Inner cover (3), being filled with of protection gas is carried out with discharging simultaneously; When the pressure in Inner cover (3) is lower than malleation 110Pa, the switch of described vapor pipe cuts out automatically, and that now only carries out protection gas in Inner cover (3) is filled with process.
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| CN112808704A (en) * | 2020-12-29 | 2021-05-18 | 江阴华新电器科技股份有限公司 | Deoiling device and deoiling process for iron core |
| CN114045379A (en) * | 2021-11-05 | 2022-02-15 | 浦项(张家港)不锈钢股份有限公司 | Cold-rolled stainless steel coil cover type annealing furnace annealing process |
| CN114182082A (en) * | 2021-12-17 | 2022-03-15 | 安徽众源新材料股份有限公司 | Production method of 0.05mm ultrathin copper strip |
| CN114293004A (en) * | 2021-12-15 | 2022-04-08 | 江苏隆达超合金股份有限公司 | Heat treatment process of seamless copper alloy sheath coil pipe for railway through ground wire |
| CN114686652A (en) * | 2022-02-18 | 2022-07-01 | 江苏嘉仕德工业炉有限公司 | All-hydrogen cover type annealing furnace with heat insulation device |
| CN116042997A (en) * | 2022-12-13 | 2023-05-02 | 江西耐乐铜业有限公司 | Hood-type annealing furnace |
| CN117467833A (en) * | 2023-12-28 | 2024-01-30 | 尚纬股份有限公司 | Online continuous annealing device and method for stranded aluminum alloy conductor |
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| CN107502712A (en) * | 2017-09-15 | 2017-12-22 | 中天合金技术有限公司 | A kind of copper strips bell-type annealing technique |
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| CN111944961B (en) * | 2020-08-13 | 2021-11-30 | 上海宝钢新材料技术有限公司 | Annealing method of variable-thickness automobile plate |
| CN111944961A (en) * | 2020-08-13 | 2020-11-17 | 上海宝钢新材料技术有限公司 | Annealing method of variable-thickness automobile plate |
| CN112808704A (en) * | 2020-12-29 | 2021-05-18 | 江阴华新电器科技股份有限公司 | Deoiling device and deoiling process for iron core |
| CN114045379A (en) * | 2021-11-05 | 2022-02-15 | 浦项(张家港)不锈钢股份有限公司 | Cold-rolled stainless steel coil cover type annealing furnace annealing process |
| CN114293004A (en) * | 2021-12-15 | 2022-04-08 | 江苏隆达超合金股份有限公司 | Heat treatment process of seamless copper alloy sheath coil pipe for railway through ground wire |
| CN114293004B (en) * | 2021-12-15 | 2023-09-05 | 江苏隆达超合金股份有限公司 | Heat treatment process of seamless copper alloy sheath coil pipe for railway through ground wire |
| CN114182082A (en) * | 2021-12-17 | 2022-03-15 | 安徽众源新材料股份有限公司 | Production method of 0.05mm ultrathin copper strip |
| CN114182082B (en) * | 2021-12-17 | 2024-01-12 | 安徽众源新材料股份有限公司 | Production method of 0.05mm ultrathin copper strip |
| CN114686652A (en) * | 2022-02-18 | 2022-07-01 | 江苏嘉仕德工业炉有限公司 | All-hydrogen cover type annealing furnace with heat insulation device |
| CN114686652B (en) * | 2022-02-18 | 2023-11-10 | 江苏嘉仕德工业炉有限公司 | All-hydrogen hood-type annealing furnace with heat insulation device |
| CN116042997A (en) * | 2022-12-13 | 2023-05-02 | 江西耐乐铜业有限公司 | Hood-type annealing furnace |
| CN117467833A (en) * | 2023-12-28 | 2024-01-30 | 尚纬股份有限公司 | Online continuous annealing device and method for stranded aluminum alloy conductor |
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