WO2022167424A1 - Continuous annealer for wire - Google Patents
Continuous annealer for wire Download PDFInfo
- Publication number
- WO2022167424A1 WO2022167424A1 PCT/EP2022/052361 EP2022052361W WO2022167424A1 WO 2022167424 A1 WO2022167424 A1 WO 2022167424A1 EP 2022052361 W EP2022052361 W EP 2022052361W WO 2022167424 A1 WO2022167424 A1 WO 2022167424A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wire
- section
- annealing
- cooling
- recrystallization
- Prior art date
Links
- 238000001953 recrystallisation Methods 0.000 claims abstract description 80
- 238000000137 annealing Methods 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 34
- 238000010924 continuous production Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 97
- 239000002826 coolant Substances 0.000 claims description 36
- 239000000839 emulsion Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims 1
- 230000001939 inductive effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005494 tarnishing Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
-
- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/563—Rolls; Drums; Roll arrangements
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5732—Continuous furnaces for strip or wire with cooling of wires; of rods
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
- C21D9/5737—Rolls; Drums; Roll arrangements
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/58—Continuous furnaces for strip or wire with heating by baths
-
- 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
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/60—Continuous furnaces for strip or wire with induction heating
Definitions
- the invention relates to a continuous wire annealer for annealing and recrystallizing a wire in a continuous process.
- the wire is in particular a metallic wire, preferably made of copper or aluminum or an alloy of several metals.
- the wire is generally drawn in several steps to reduce the cross-section, i. H. each passed through a drawing die having an opening with a slightly smaller diameter than the diameter of the wire passed through. In this way, the material of the wire is deformed, thereby reducing the diameter of the wire to the diameter of the opening in the drawing die. Since only a small reduction in cross-section of the wire is possible with such a drawing process, several such drawing processes are carried out in succession, in which the diameter of the wire is successively reduced until the desired wire diameter is reached.
- the wire is recrystallized by the addition of heat, i. H. the crystal lattice of the wire material, which shows lattice defects in the form of dislocations in the lattice structure as a result of the drawing, is reformed and thus "repaired".
- Recrystallization is essentially determined by three parameters, namely degree of deformation, temperature and holding time:
- the so-called degree of deformation is the extent of the change in the crystal structure as a result of the drawing process, in particular the extent of the reduction in cross section of the wire.
- the heat for the recrystallization can be supplied “offline”, ie the drawn and hardened wire is heated in a stationary heat treatment device, in particular in a recrystallization furnace, and thereby recrystallized.
- the recrystallization process is determined in particular by the temperature profile over time, in particular by process parameters such as the run-up time, the holding time, the holding temperature and the cooling time.
- the wire can be recrystallized in a continuous process, i. H. while the wire runs through the drawing plant with undiminished speed.
- a continuous process i. H. while the wire runs through the drawing plant with undiminished speed.
- the feed speed of the wire can be up to 50 meters per second, so that recrystallization has to take place in fractions of a second.
- the wire After recrystallization, the wire has to be cooled down again, which is also done in a continuous process and is integrated in a single plant, a continuous wire annealer. Again, this happens in fractions of a second.
- cooling takes place immediately after recrystallization by immersing the wire in a coolant, in particular in an emulsion or in oil.
- a coolant in particular in an emulsion or in oil.
- Direct immersion of the wire in the coolant also prevents surface tarnishing.
- the disadvantage of this method is that the thermal energy introduced into the wire is withdrawn from the wire again immediately after recrystallization by immersing the wire in the coolant. This reduces the temperature holding time, which in turn has to be compensated for by a higher heat input. This leads to a high energy consumption of the continuous wire annealer.
- the object of the present invention is therefore to reduce the energy consumption of the continuous wire annealer.
- the invention is based on a continuous wire annealer for annealing and recrystallizing a wire, in particular a metallic wire, in a continuous process, which has:
- Annealing means for annealing the first wire section in the annealing section, as a result of which a first partial recrystallization process takes place in the first wire section in the annealing section.
- the first and/or the second contact disk is preferably designed as a rotatably mounted deflection roller for the wire.
- a deflection roller has on its outer periphery a recessed track for the wire, in which the wire runs in a partial revolution or in one or more than one complete revolution around the deflection roller.
- the invention is based on the idea of extending the effective time of the recrystallization (corresponding to the above-mentioned holding time in the "offline process") by not cooling the wire immediately after leaving the annealing section, but giving it the opportunity without further heat supply to recrystallize further. Any cooling section is shifted further to the rear in the direction of wire travel.
- a recrystallization section is arranged after the second contact disk, which is set up so that a second wire section, which has previously passed through the annealing section as a first wire section, runs through the recrystallization section and that in the second wire section a second Recrystallization part process takes place.
- first partial recrystallization process and “second partial recrystallization process” are not to be understood in such a way that the recrystallization ends after the first partial recrystallization process and begins anew with the second partial recrystallization process. Rather, the first and the second partial recrystallization process physically seen together form a continuous, uninterrupted recrystallization process, which is only conceptually broken down into two partial processes. In other words, the entire recrystallization process is started by the first recrystallization sub-process and lengthened by the second recrystallization sub-process.
- the method according to the invention extends in particular the total distance over which the recrystallization takes place, and thus also the recrystallization time. Any subsequent cooling section is simultaneously shifted further back in the direction of wire travel. Due to the extended recrystallization time, the recrystallization temperature can be lowered while achieving the same residual elongation, which leads to a direct saving of energy.
- the operator of the continuous wire annealer can thus choose whether he wants to save energy or improve the residual elongation of the wire.
- the glow means are means for conductive heating of the first wire section, the first contact disk and the second contact disk each being set up to feed or discharge an electric current into or from the first wire section.
- the conductive heating of the first wire section results in good efficiency, since the electrical energy is converted directly into thermal energy as a result of the electrical (ohmic) resistance of the first wire section.
- the glow means are means for inductively heating the first wire section.
- the first wire section is arranged in the form of a loop or coil, the ends of which are connected in an electrically conductive manner and are therefore short-circuited.
- This loop or coil of wire acts as a secondary coil for inductive energy transfer and is placed near a primary coil through which an alternating current flows, so that an alternating voltage is induced in the loop or coil of wire by electromagnetic induction and thereby an eddy current, which in turn flows through the first section of wire whose electrical (ohmic) resistance heats up.
- the first wire section is heated without contact and thus also without wear, although the efficiency of the energy transmission is lower than with conductive heating of the wire.
- the recrystallization section is set up to place the second wire section under a protective gas.
- Water vapor, nitrogen, hydrogen or a mixture of nitrogen and hydrogen is preferably used as the protective gas for this purpose. Due to the displacement of atmospheric oxygen, the protective gas prevents the oxidation of the wire surface and thus its tarnishing.
- the continuous wire annealer has no cooling device for the wire between the annealing section and the recrystallization section.
- the lack of a cooling device between the annealing and recrystallization sections can increase energy savings, since almost all of the residual heat that is present in the first wire section when it leaves the annealing section in the recrystallization section can be used for the second partial recrystallization process.
- the continuous wire annealer has a cooling device for cooling the second contact disk.
- a cooling device for the second contact disk may be required, since the heat of the first wire section running out of the annealing section is continuously introduced into the second contact disk and the second contact disk thus heats up considerably. In view of the relatively high temperatures of the first wire section in the annealing section (for example 550° C.), without such a cooling device this could lead to a thermal overload of the second contact disk.
- the cooling device for cooling the second contact disk has means for spraying the second contact disk with a coolant, in particular again with an emulsion or with oil.
- the second contact disk together with the wire section contacting it, is completely immersed in a cooling basin filled with coolant, as a result of which not only the second contact disk but also this wire section is greatly cooled.
- the second contact disk when the second contact disk is cooled by spraying with the coolant, the second contact disk is cooled in a targeted manner, but only to a small extent the wire section contacting it. Furthermore, the coolant can be supplied and discharged again without any problems in this way.
- the amount of coolant supplied per unit of time can also be controlled in a simple manner and adapted to the amount of heat to be dissipated.
- Targeted directing of a coolant spray jet onto the second contact disk, in particular onto that part of the contact strip on its outer circumference which is not wrapped by the wire, can prevent the wire section wrapped around the outer circumference of the second contact disc from being severely cooled.
- a cooling section and/or a cooling basin are arranged after the recrystallization section, viewed in the direction of wire travel, which are set up so that a third wire section, which has previously passed through the recrystallization section as a second wire section, passes through the cooling section and/or the Cooling basin passes through and is cooled therein by a coolant.
- Such a cooling section or such a cooling basin may be necessary if the wire, after leaving the recrystallization section, is still too warm to be processed further, in particular to be wound up on a spool.
- the cooling section is preferably designed as a housing filled with the coolant, with the third wire section being immersed in the cooling basin and passing through it.
- the third wire section in the cooling basin is preferably only sprayed by the coolant—similar to the cooling device for the second contact disk described above.
- the continuous wire annealer has the cooling section, and the cooling section has means for spraying the third wire section with a coolant, in particular again with an emulsion or with oil.
- the cooling section particularly preferably has at least one device for regulating the volume flow of the coolant in the cooling section.
- the device has at least one valve for introducing coolant into the cooling section, and the at least one valve is adjustable and is designed in particular as a proportional valve.
- the use of a proportional valve makes it possible to precisely control the amount of coolant introduced through the valve into the cooling section per unit of time. In this way, the cooling effect in the cooling section can be adapted to the amount of heat to be dissipated. This amount of heat in turn depends in particular on the volume of the wire material in the third wire section and thus on the wire diameter there.
- the device for regulating the volume flow can also have a hand lever valve, for example.
- a frequency-controlled pump is also conceivable in order to improve the cooling effect by means of a higher volume flow.
- a first wire section runs through the annealing section and is annealed there, with a first partial recrystallization process taking place in the first wire section.
- a second wire section which previously passed through the annealing section as a first wire section, runs through the recrystallization section, with a second partial recrystallization process taking place in the second wire section.
- 1 shows a continuous wire annealer from the prior art without a recrystallization section
- 2 shows a continuous wire annealer according to the invention with a recrystallization section.
- FIG. 1 shows a continuous wire annealer 1 from the prior art, which has an annealing section 8 and a cooling section 4, but no recrystallization section.
- the wire 12 which was drawn to a specific diameter in a drawing machine (not shown) and solidified in the process, is heated in the wire continuous annealing machine 1 and thereby recrystallized in order to largely eliminate the solidification and thus in particular the residual elongation, d. H. to increase the maximum elongation before the wire breaks.
- the wire 12 is inserted into the continuous wire annealer 1 on the left-hand edge and initially runs around a deflection roller 10. All contact disks of the continuous wire annealer 1 according to FIGS. 1 and 2 are also designed as deflection rollers. The wire 12 then runs through a number of other deflection rollers. The passage speed of the wire 12 through the continuous wire annealer 1 is 30 m/s, for example.
- the annealing section 8 is designed as a closed housing (apart from the inlet and outlet openings for the wire 12), so that as little thermal energy as possible can escape from the heated wire into the environment.
- the length of the annealing zone 8 in the continuous wire annealer 1 according to FIG. 1 is 2000 mm, for example.
- the section of the wire 12 that runs through the annealing section 8 is referred to as the first wire section.
- the direction of wire travel in the annealing section 8 is indicated by the arrow above the annealing section 8 .
- the first wire section is heated by applying a voltage to the first contact disk 2 and the second contact disk 3, preferably a DC voltage, but particularly preferably an AC voltage, is applied, as a result of which a direct current or an alternating current flows through the first wire section, which heats the first wire section due to its ohmic resistance.
- the wire 12 reaches a temperature of 550° C., for example, when it enters the inlet cooling nozzle 7 of the cooling basin 9 .
- a first partial recrystallization process takes place in the first wire section as a result of the heating of the latter, as a result of which hardening in the first wire section caused by the preceding drawing process is largely eliminated.
- the wire 12 leaves the annealing section 8 at the entrance to the cooling basin 9 , where it enters the entry cooling nozzle 7 .
- the wire 12 is sprayed with a coolant, which is preferably an emulsion or oil, in order to already dissipate part of the heat energy from the wire 12 at this point.
- the wire 12 is then guided around a second contact disk 3 within the cooling basin 9 .
- the cooling basin 9 is filled with another coolant, so that the second contact roller 3 and the section of the wire 12 surrounding it are completely immersed in the coolant.
- the coolant in the cooling basin 9 dissipates the heat from this wire section.
- the heated coolant is discharged continuously or at specific time intervals and replaced with cold coolant.
- the wire 12 leaves the cooling basin 9 again through the exit cooling nozzle 6, in which the wire 12 is again sprayed or sprayed with a coolant.
- the wire 12 then runs through a cooling section 4.
- This also has a closed housing (apart from the inlet and outlet openings for the wire 12), which is flooded with another coolant and in which the wire 12 is completely immersed.
- the direction of wire travel in the cooling section 4 is indicated by the arrow above the cooling section 4 .
- the wire 12 is cooled by the cooling tank 9 with the cooling nozzles 6 and 7 and the cooling section 4 to a temperature which enables it to be further processed, in particular to be wound onto a spool. However, only as little thermal energy as possible is withdrawn from the wire 12 in order to ensure the necessary final temperature during winding (approx. 50° C.).
- the wire 12 still wetted by the coolant runs through a drying section 5 in which it is dried, preferably by air blown into the drying section 5 .
- the wire 12 is then led out of the continuous wire annealer 1 via several other deflection rollers on the right-hand edge of the latter in order to be further processed there, in particular wound onto a spool (not shown).
- Fig. 2 shows a continuous wire annealer 1 according to the invention with a recrystallization section 11.
- the continuous wire annealer 1 according to the invention according to FIG. 2 is based on the continuous wire annealer 1 from the prior art according to FIG. 1 and has some modifications compared to it. Corresponding elements of the two continuous wire annealers 1 are therefore not described again.
- the wire 12 is conducted to the annealing line 8 as in FIG. 1 and heated there, whereby a first partial recrystallization process takes place in the first wire section, and then enters the cooling pool 9 as well.
- the wire 12 is again guided around a second contact disk 3 (not shown in FIG. 2).
- the wire 12 is cooled only slightly or not at all.
- the second contact disk 3 is sprayed with a further coolant in order to cool it, while the wire 12 remains largely uncooled.
- the cooling basin 9 can preferably also be flooded with the coolant, this is preferably circulated and exchanged little or not at all, so that only little heat energy is dissipated by the coolant.
- the question of how much coolant must be in the cooling basin 9, ie the filling level of the cooling basin 9, can be determined experimentally and can differ depending on the environment.
- the wire 12 then runs through the recrystallization section 11, which—like the cooling section 4 arranged at the corresponding point in FIG. 1—has a largely closed housing. However, the wire 12 is not cooled in the recrystallization section 11 . Thus, the wire 12 is still warm enough after leaving the cooling basin 9 that a second partial recrystallization process can take place in the recrystallization section 11 .
- the annealing section--in the sense of the section on which recrystallization occurs in the wire 12-- is lengthened to a certain extent, for example even doubled, but only in the first part--the actual annealing section 8--is an energy input.
- the thermal energy input into the annealing section 8 can be reduced, which leads to the above-mentioned energy saving of up to 20%.
- the wire 12 runs through a cooling section 4 and a cooling basin 13 in order to reduce the temperature of the wire 12 to a temperature suitable for further processing.
- the cooling section 4 and the cooling basin 13 are at least partially arranged in an additional housing 15 in the exemplary embodiment according to FIG.
- the cooling section 4 and the cooling basin 13 can also be integrated into the housing 14 of the continuous wire annealer 1 . It is also possible to provide only the cooling section 4 or only the cooling basin 13 .
- the wire 12 is immersed in a coolant--similarly to the continuous wire annealer 1 in FIG.
- the volume flow of the coolant can be regulated in the cooling section 4, as a result of which the cooling effect on the wire 12 can also be regulated as a function of the diameter and the feed speed of the wire 12. This is preferably done by at least one proportional valve (not shown).
- the wire 12 is also immersed in a coolant or merely sprayed with a coolant.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280013691.1A CN116848270A (en) | 2021-02-05 | 2022-02-01 | Wire continuous annealing device |
US18/264,099 US20240093327A1 (en) | 2021-02-05 | 2022-02-01 | Continuous annealer for wire |
EP22709205.3A EP4288573A1 (en) | 2021-02-05 | 2022-02-01 | Continuous annealer for wire |
JP2023547473A JP2024505690A (en) | 2021-02-05 | 2022-02-01 | Continuous wire annealing equipment |
MX2023009173A MX2023009173A (en) | 2021-02-05 | 2022-02-01 | Continuous annealer for wire. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021201104.7 | 2021-02-05 | ||
DE102021201104.7A DE102021201104A1 (en) | 2021-02-05 | 2021-02-05 | continuous wire annealer |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022167424A1 true WO2022167424A1 (en) | 2022-08-11 |
Family
ID=80684995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/052361 WO2022167424A1 (en) | 2021-02-05 | 2022-02-01 | Continuous annealer for wire |
Country Status (7)
Country | Link |
---|---|
US (1) | US20240093327A1 (en) |
EP (1) | EP4288573A1 (en) |
JP (1) | JP2024505690A (en) |
CN (1) | CN116848270A (en) |
DE (1) | DE102021201104A1 (en) |
MX (1) | MX2023009173A (en) |
WO (1) | WO2022167424A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2040870A1 (en) * | 1970-02-25 | 1971-09-16 | Outokumpu Oy | Continuous wire resistance annealing process |
DE19614586A1 (en) * | 1996-04-12 | 1997-10-16 | Niehoff Kg Maschf | Annealing of continuous metal products |
CN203938720U (en) * | 2014-06-26 | 2014-11-12 | 芜湖楚江合金铜材有限公司 | The online bright annealing device of a kind of copper alloy wire |
CN203999742U (en) * | 2014-08-04 | 2014-12-10 | 伊东新(德阳)线缆设备有限公司 | Separated motor transmission aluminum steel annealing device |
WO2020078829A1 (en) * | 2018-10-16 | 2020-04-23 | Nv Bekaert Sa | Method for thermal treatment of steel wire with associated apparatus |
-
2021
- 2021-02-05 DE DE102021201104.7A patent/DE102021201104A1/en active Pending
-
2022
- 2022-02-01 CN CN202280013691.1A patent/CN116848270A/en active Pending
- 2022-02-01 JP JP2023547473A patent/JP2024505690A/en active Pending
- 2022-02-01 WO PCT/EP2022/052361 patent/WO2022167424A1/en active Application Filing
- 2022-02-01 MX MX2023009173A patent/MX2023009173A/en unknown
- 2022-02-01 EP EP22709205.3A patent/EP4288573A1/en active Pending
- 2022-02-01 US US18/264,099 patent/US20240093327A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2040870A1 (en) * | 1970-02-25 | 1971-09-16 | Outokumpu Oy | Continuous wire resistance annealing process |
DE19614586A1 (en) * | 1996-04-12 | 1997-10-16 | Niehoff Kg Maschf | Annealing of continuous metal products |
CN203938720U (en) * | 2014-06-26 | 2014-11-12 | 芜湖楚江合金铜材有限公司 | The online bright annealing device of a kind of copper alloy wire |
CN203999742U (en) * | 2014-08-04 | 2014-12-10 | 伊东新(德阳)线缆设备有限公司 | Separated motor transmission aluminum steel annealing device |
WO2020078829A1 (en) * | 2018-10-16 | 2020-04-23 | Nv Bekaert Sa | Method for thermal treatment of steel wire with associated apparatus |
Also Published As
Publication number | Publication date |
---|---|
US20240093327A1 (en) | 2024-03-21 |
MX2023009173A (en) | 2023-08-18 |
EP4288573A1 (en) | 2023-12-13 |
JP2024505690A (en) | 2024-02-07 |
DE102021201104A1 (en) | 2022-08-11 |
CN116848270A (en) | 2023-10-03 |
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