CN107746928B - Continuous tempering device and method for die-cutting knife steel belt - Google Patents
Continuous tempering device and method for die-cutting knife steel belt Download PDFInfo
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- CN107746928B CN107746928B CN201711165198.9A CN201711165198A CN107746928B CN 107746928 B CN107746928 B CN 107746928B CN 201711165198 A CN201711165198 A CN 201711165198A CN 107746928 B CN107746928 B CN 107746928B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 93
- 239000010959 steel Substances 0.000 title claims abstract description 93
- 238000005496 tempering Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 32
- 238000005520 cutting process Methods 0.000 title abstract description 15
- 238000010791 quenching Methods 0.000 claims abstract description 61
- 230000000171 quenching effect Effects 0.000 claims abstract description 61
- 238000001816 cooling Methods 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 5
- 230000003750 conditioning effect Effects 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 74
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000000047 product Substances 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052797 bismuth Inorganic materials 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910001563 bainite Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical group OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000006032 tissue transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- 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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
- C21D1/613—Gases; Liquefied or solidified normally gaseous 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
- 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
- C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
-
- 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
- C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
-
- 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
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
-
- 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
Abstract
The invention discloses a continuous quenching and tempering device for a die-cutting rule steel belt, which comprises the following components: the steel strip passes through the heating furnace, the quenching chamber and the tempering furnace; further comprises: a cooling nozzle, a circulation loop and a circulation inlet pipe; the quenching chamber is provided with a cooling port and a circulating outlet; the cooling nozzle adopts a Venturi effect structure; the circulating loop is connected between the circulating inlet pipe and the circulating outlet; the cooling nozzle is mounted on the cooling port. The cooling nozzle with the venturi tube structure in the quenching chamber is used for cooling the steel strip, quenching is completed in a gaseous mode, and the gas after quenching is circulated, so that the gas sprayed by the cooling nozzle can be cooled by heat exchange and heated, and the pressurized sprayed gas can work at a proper temperature. And the working condition of the circulating gas and the steel belt can be more stable and controllable during continuous heat exchange.
Description
Technical Field
The invention relates to a die-cutting rule steel belt processing device and a die-cutting rule steel belt processing technology; in particular to a continuous hardening and tempering device and a continuous hardening and tempering method for a die-cutting rule steel belt.
Background
The die cutting knife belt is mainly used in the die cutting process of the printing and packaging industry, and is a basic tool and consumable in the production process of the industry. When in use, the die-cutting knife belt is required to have excellent bending performance and good hardness, toughness and rigidity, and the characteristics can meet the use requirements only by adopting a specific tempering process for proper raw materials. Therefore, in the production process of the die-cut strip, the tempering process of the raw material steel strip is a basic process for determining the usability of the finished product.
The processes adopted in the tempering process of the raw material steel strip in the existing die cutter strip production process are basically patenting process. The basic flow of the process is as follows: the steel strip is heated to austenitizing temperature of the steel by a heating furnace in sequence, then immersed into a lead pool for isothermal quenching, and then continuously enters into a heat preservation furnace for tempering (isothermal) treatment. The die cutter belt material treated by the tempering process can basically meet the service performance requirements of the die cutter belt finished product. However, in practical production, the quenching medium of the process is molten heavy metal lead and bismuth or a mixture thereof, so that the following defects exist, the further improvement of the quality of die-cutting rule products is restricted, and the growth and development of production enterprises are restricted.
The quenching medium of the molten heavy metal lead and bismuth or the blending thereof is often dissipated in the production field in the form of steam, dust or splashes in the production process, so that the production field has the risk of heavy metal pollution, and the safe production is endangered.
After passing through the austenitizing furnace, the strip must be immersed below the level of molten lead and therefore multiple guides must be provided in the plant structure to allow the strip to enter below the level of lead and exit from the lead. The existence of the guiding devices inevitably leads the surfaces and the molded bodies of the steel belts to be scratched or deformed, which is a main factor causing defective products or waste products in the tempering process, and meanwhile, the steel belts are deformed for a plurality of times by the guiding devices to interfere the tissue transformation inside the steel belts, and the overhaul and the maintenance of the guiding devices are carried out in a high-temperature state, so that the production safety risk exists.
After the steel strip is quenched in the lead pool, some heavy metal residues are inevitably present on the surface of the steel strip. Significant costs must be incurred to clean or purge.
Since it is necessary to melt the lead block in advance to start production, the equipment start-stop preparation time is long. There are also companies attempting to use molten salts instead of heavy metals lead and bismuth or their blends, but the use of molten salts does not avoid the environmental pollution and the safety and occupational hygiene problems of the production site.
Disclosure of Invention
The invention discloses a continuous quenching and tempering device and method for a die-cutting knife steel belt, which are used for solving the problems of high defective rate, severe production environment and high production cost caused by unreasonable structure of the device and method in the prior art.
The above object of the present invention is achieved by the following technical solutions:
a continuous conditioning apparatus for die cutter steel strip, comprising: the steel strip passes through the heating furnace, the quenching chamber and the tempering furnace; further comprises: a cooling nozzle, a circulation loop and a circulation inlet pipe; the quenching chamber is provided with a cooling port and a circulating outlet; the cooling nozzle adopts a Venturi effect structure; the circulating loop is connected between the circulating inlet pipe and the circulating outlet; the cooling nozzle is mounted on the cooling port.
The continuous conditioning device for die cutter steel belts as described above, wherein the circulation loop comprises: the circulating inlet pipe and the circulating outlet are connected with the circulating outlet; the one-way cycle comprises: the first filter, the first passage of the heat exchanger, the first cooler and the fifth flow regulating valve are communicated in sequence.
The continuous quenching and tempering device for the die cutter steel belt, wherein the cooling nozzle is connected with a plurality of pressurized gas pipes; the circulation loop further includes: and the two-way circulation is communicated with the first passage and the pressurizing gas pipe.
The continuous quenching and tempering device for the die cutter steel belt, wherein the two-way circulation comprises: the first flow regulating valve, the second cooler, the second filter, the gas booster, the surge tank, the second passage of the heat exchanger and the precise filter are communicated in sequence.
The continuous quenching and tempering device for the die cutter steel belt, wherein the two-way circulation further comprises: the auxiliary air source pipe is communicated with the second filter, and the micro process air pipe is communicated with the pressure stabilizing pipe.
The continuous quenching and tempering device for the die-cutting rule steel belt is characterized in that the auxiliary air source pipe is provided with the second flow regulating valve, and the micro-process air pipe is provided with the third flow regulating valve.
The continuous quenching and tempering device for the die cutter steel belt is characterized in that the pressurizing gas pipes are provided with the fourth flow regulating valves.
The continuous quenching and tempering device for the die-cutting rule steel belt is characterized in that heat-insulating sealing plates are arranged among the heating furnace, the tempering furnace and the quenching chamber; the steel strip passes through the heat-insulating sealing plate.
A continuous quenching and tempering method for a die-cutting knife steel belt comprises the steps of heating the steel belt to an austenitizing temperature through a heating furnace, and entering a quenching chamber after austenitizing transformation of the steel belt is completed; a cooling nozzle of the venturi tube structure sprays and sweeps the mixed gas flow on the surface of the steel strip; the gas exhausted from the quenching chamber and the gas source gas are subjected to heat exchange and temperature reduction and then are circulated to a cooling nozzle; the air source is pressurized, stabilized in pressure, subjected to heat exchange and temperature rise, and then enters the cooling nozzle to be mixed with the gas discharged from the quenching chamber to form a mixed gas flow; the steel strip is reduced from austenitizing temperature to quenching temperature; the steel strip enters a tempering furnace.
The continuous tempering method for the die cutter steel belt, wherein the austenitizing temperature of the steel belt is controlled as follows: the temperature of the quenched steel belt is controlled at 880+/-30 ℃:400 ℃ + -50 ℃.
In summary, by adopting the technical scheme, the problems of high defective product rate, severe production environment and high production cost caused by unreasonable structure of the device and the method in the prior art are solved, the cooling nozzle with the venturi effect tube structure in the quenching chamber is used for cooling the steel strip, quenching is completed in a gaseous state, and the quenched gas is circulated, so that the gas sprayed by the cooling nozzle can be cooled by heat exchange and heated, and the pressurized sprayed gas can work at a proper temperature. Furthermore, the output pressure and the output flow of the cooling nozzle can be adjusted, the circulating flow and the circulating flow rate of the circulating gas can be changed, and the heat exchange efficiency of the circulating gas is optimized and enhanced, so that the working condition of the circulating gas and the steel belt during continuous heat exchange is more stable and controllable.
Drawings
FIG. 1 is a schematic view of a continuous tempering apparatus for die cutter steel belts according to the present invention;
fig. 2 is a schematic structural view of a circulation loop of the continuous hardening and tempering device for die cutter steel belts according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples:
fig. 1 is a schematic structural view of a continuous hardening and tempering apparatus for die cutter steel belts according to the present invention, and fig. 2 is a schematic structural view of a circulation loop of the continuous hardening and tempering apparatus for die cutter steel belts according to the present invention, referring to fig. 1 and 2, a continuous hardening and tempering apparatus for die cutter steel belts includes: the steel strip 18 passes through the heating furnace 20, the quenching chamber 21 and the tempering furnace 22, the heating furnace 20 heats the steel strip 18 to the austenite temperature, the quenching chamber 21 quenches the steel strip 18, and the tempering furnace 22 performs cooling or heat preservation on the steel strip 18; further comprises: a cooling nozzle 25, a circulation loop and a circulation inlet pipe; the quenching chamber 21 is provided with a cooling port and a circulating outlet; the cooling nozzle 25 adopts a venturi effect structure; the circulating loop is connected between the circulating inlet pipe and the circulating outlet; a cooling nozzle 25 is mounted on the cooling port.
The invention also discloses a continuous quenching and tempering method for the die-cutting knife steel belt, wherein the steel belt 18 is heated to an austenitizing temperature through a heating furnace 20, and the steel belt 18 enters a quenching chamber 21 after austenitizing transformation is completed; the venturi structured cooling nozzle 25 sweeps the mixed gas stream over the surface of the steel strip 18; the gas discharged from the quenching chamber 21 and the gas source gas are subjected to heat exchange and temperature reduction and then are circulated to the cooling nozzle 25; the air source is pressurized, stabilized in pressure, subjected to heat exchange and temperature rise, enters the cooling nozzle 25 and is mixed with the gas discharged from the quenching chamber 21 to form a mixed gas flow; the strip 18 is reduced from the austenitizing temperature to the quenching temperature; the steel strip 18 enters a tempering furnace 22.
Specifically, the steel strip 18 runs at a constant speed through a heating furnace 20, a quenching chamber 21, and a tempering furnace 22. The steel strip 18 may be one strip or a plurality of strips may be parallel at the same time.
Further, the austenitizing temperature of the steel strip 18 is controlled to be: the temperature of the quenched steel strip 18 is controlled at 880+/-30 ℃:400 ℃ + -50 ℃.
Specifically, the heating furnace 20 in the present invention: the effect is primarily to heat the raw steel strip 18 to a certain temperature range and for a certain time to complete the austenitizing transformation. This temperature range is commonly referred to as austenitizing temperature a, and the specific temperature values will vary depending on the material of the strip 18. The austenitizing temperature A of the steel to be quenched and tempered in the present invention is in the range of 880.+ -. 30 ℃. Depending on the subsequent requirements of the steel strip 18 to be treated, a corresponding gas may be introduced into the furnace 20, that is, the furnace 20 may have a gas inlet and associated gas inlet means, and the specific gas introduced may be, but is not limited to: hydrogen, nitrogen, steam or mixtures thereof, etc., to obtain better surface quality and surface decarburization.
Specifically, the quenching chamber 21 in the present invention: the effect is mainly to rapidly cool the steel strip having been austenitized in the furnace 20 to a certain quenching temperature B and terminate the cooling. This process is an external condition for transformation of the internal structure of the steel. Under the conditions of different cooling speeds and different quenching temperatures B, different structures, such as a martensitic structure, a bainitic structure, a sorbite structure or a mixed structure thereof, can be obtained in the steel strip. These different textures show physical properties such as hardness, toughness, rigidity and the like on the quenched and tempered steel strip. The final product of the steel strip to be tempered in the present invention is a die cutter strip, which is desired to have excellent bendability and good hardness, toughness, and rigidity at the time of use. Therefore, in the present invention, it is preferable to obtain as much bainite structure as possible in the quenched and tempered steel strip. The quenching temperature B of the steel in the present invention may range between 400 ℃ + -50 ℃.
In the present invention, the tempering furnace 22 is controlled to have a temperature ranging from 350 to 400 ℃ in order to obtain as much bainite structure as possible in the steel strip after the tempering treatment. In order to obtain a good surface quality or surface coloration, a corresponding gas may be introduced into tempering furnace 22.
The steel strip 18 in the invention is a case of simultaneously combining a plurality of medium carbon steel strips with the width of 8.0-60mm and the thickness of 0.45-1.42 mm; but the application of the present invention is not limited to such specifications.
Further, the circulation loop includes: one path of circulation is connected with the circulation inlet pipe and the circulation outlet; one cycle includes: a first filter 10, a first passage of the heat exchanger 8, a first cooler 11, and a fifth flow rate regulating valve 12, which are sequentially communicated.
Further, the cooling nozzle 25 is connected to a plurality of pressurized gas pipes; the circulation loop further includes: and the two-way circulation is communicated with the first passage and the pressurized gas pipe. The cooling nozzles 25 may be two or more in actual use, and may be arranged in a flexible and various arrangement structure according to actual situations.
Further, the two-way cycle includes: a first flow rate control valve 7, a second cooler 1, a second filter 2, a gas booster 3, a surge tank 6, a second passage of a heat exchanger 8, and a fine filter 9, which are sequentially connected. The gas booster 3 is used for generating a booster gas, the booster gas is a power source for driving the circulating gas to flow, and the circulating flow rate and the flow velocity of the circulating gas can be indirectly adjusted by adjusting the output pressure or the flow rate of the booster gas, so that the thermal efficiency of the circulating gas can be adjusted.
Further, the two-way cycle further includes: an auxiliary gas source pipe 29 and a trace process gas pipe 30, wherein the service gas source pipe is communicated with the second filter 2, and the trace process gas pipe 30 is communicated with the pressure stabilizing pipe. The second filter 2 is mainly used for filtering impurities carried by the gas flow.
Further, the secondary gas source pipe 29 is provided with a second flow rate adjusting valve 4, and the micro process gas pipe 30 is provided with a third flow rate adjusting valve 5.
Further, the fourth flow regulating valves 14 are installed on the pressurized gas pipes for regulating the flow rate of the pressurized gas pipe injection.
Specifically, the surge tank 6 mainly serves to stabilize the pressure in the pressurized gas passage; the heat exchanger 8 mainly serves to preheat the temperature of the charge gas with the heat in the recycle gas loop; the precise filter 9 is mainly used for filtering impurities carried by the pressurized gas so as not to block the central nozzle; the micro process gas pipe 30 supplements the interface of the micro process gas, liquid or gas-liquid mixture into the recycle gas loop.
Specifically, the gas in the auxiliary gas source in the invention can be air, and can also be other gases required by the process, such as hydrogen, nitrogen, water vapor or a mixture thereof, and the like. The initial introduction and replenishment of these gases is accomplished primarily through the orifice.
Specifically, the hot air flowing back from the circulating inlet pipe is split after passing through the heat exchanger 8, part of the hot air enters the first cooler 11, and the other part of the hot air enters the two-way circulation through the first flow regulating valve 7. The two-way cycle also has an auxiliary air source.
In the practice of the invention, the quenching chamber 21 may comprise two parts, the front part being a cooling cavity fitted with two cooling nozzles 25; the rear part is provided with a baffle plate with holes: the circulation chambers of the upper and lower partitions 27, 28 have ports P1, P2 for circulating gas from the quenching chamber 21, i.e. two ports for connecting the circulation outlets. The orifices P3, P4 are the circulating gas ports into the quenching chamber 21, and the flow direction is from the orifices P1, P2 to the orifices P3, P4. The first filter 10 in the circulation loop is mainly used for filtering impurities carried by the gas in the circulation loop. The heat exchanger 8 is mainly used to preheat the other pressurized gas so that the temperature of the blown quenching chamber 21 is not too low, thereby affecting the temperature uniformity of the cooled strip 18. The first cooler 11 is mainly used for adjusting the temperature of the circulating gas when it is blown into the quenching chamber 21. Two first flow rate adjusting valves 7 are provided corresponding to the two nozzles P3 and P4, and are mainly used for adjusting the amount of the circulating gas blown into the quenching chamber 21.
By combining the first cooler 11 with the fifth flow rate regulating valve 12, the circulating gas temperature C at the time of blowing into the quenching chamber 21 can be adjusted more accurately and kept constant. And the value of the circulating gas temperature C is set in a temperature range that is somewhat lower than the quenching temperature B of the steel strip 18. The quenching temperature B of the steel strip 18 in this case ranges between 400C + 50C, and the value of the circulating gas temperature C in this case may be set between 280℃ + 30℃.
The nozzles P5, P6, P7, P8 on the cooling nozzle 25 are the interfaces for the pressurized gas, i.e. the pressurized gas pipes. The cooling nozzle 25 is designed and manufactured to have a venturi effect, which can drive a large amount of circulating gas introduced through the nozzles P3, P4 and spray out from the slits around the center nozzle when only a small amount of pressurized gas is sprayed out from the center nozzle at a high speed, and form a mixed gas stream with the gas sprayed out from the center nozzle, and spray and sweep the surface of the steel strip 18 to be rapidly cooled, so that the steel strip 18 is rapidly cooled from the austenitizing temperature a to the range of the quenching temperature B to be reached. The gas flow after heat exchange with the steel strip 18 leaves the quenching chamber 21 from the pipe orifices P1, P2 respectively via the perforated partition plate arranged at the rear section of the quenching chamber 21 along the running direction of the steel strip 18, and enters the circulating gas circuit, and so on.
Further, heat-insulating sealing plates 23 are arranged among the heating furnace 20, the tempering furnace 22 and the quenching chamber 21; the steel strip 18 passes through the insulating sealing plate 23.
The above description of the specific embodiments of the present invention has been given in detail, but the present invention is not limited to the above-described specific embodiments, which are merely examples. Any equivalent modifications and substitutions for this system will also be within the scope of the present invention for those skilled in the art. Accordingly, equivalent changes and modifications are intended to be included within the scope of the present invention, without departing from the spirit and scope thereof.
Claims (4)
1. A continuous conditioning device for a die cutter steel belt, comprising: the steel strip passes through the heating furnace, the quenching chamber and the tempering furnace; further comprises: a cooling nozzle, a circulation loop and a circulation inlet pipe; the quenching chamber is provided with a cooling port and a circulating outlet; the cooling nozzle adopts a Venturi effect structure; the circulating loop is connected between the circulating inlet pipe and the circulating outlet; the cooling nozzle is arranged on the cooling port;
a heat-insulating sealing plate is arranged among the heating furnace, the tempering furnace and the quenching chamber; the steel strip passes through the heat-insulating sealing plate;
the quenching chamber comprises two parts, and the front part is a cooling cavity provided with two cooling nozzles; the rear part is a circulation cavity provided with an upper partition plate and a lower partition plate with holes, and the circulation cavity is provided with two circulation outlets; the two circulating outlets are respectively connected with a circulating central nozzle of the two cooling nozzles;
the orifice of the cooling nozzle is provided with a two-way circularly connected pressurized gas interface, namely a pressurized gas pipe; the device is arranged at the periphery of a central nozzle connected with one path of circulation, and when a small amount of pressurized gas sprayed from a pressurized gas pipe is sprayed from the periphery of the central nozzle at a high speed, a large amount of circulating gas led in through the central nozzle is driven to form mixed gas flow with the gas sprayed from the central nozzle, and the mixed gas flow is sprayed on the surface of a steel strip needing rapid cooling, so that the steel strip is rapidly cooled from an austenitizing temperature A to a quenching range to be reached to a temperature B;
the circulation loop includes: the circulating inlet pipe and the circulating outlet are connected with the circulating outlet; the one-way cycle comprises: the first filter, the first passage of the heat exchanger, the first cooler and the fifth flow regulating valve are sequentially communicated;
the circulation loop further includes: the second-path circulation is communicated with the first path and the pressurizing gas pipe;
the two-way cycle comprises: the first flow regulating valve, the second cooler, the second filter, the gas booster, the surge tank, the second passage of the heat exchanger and the precise filter are sequentially communicated;
the hot air flowing back from the circulating inlet pipe is split after passing through the heat exchanger, part of the hot air enters the first cooler, and the other part of the hot air enters the two-way circulation through the first flow regulating valve; the two-way cycle further includes: the auxiliary air source pipe is communicated with the second filter, and the micro process air pipe is communicated with the surge tank; the auxiliary air source pipe is provided with a second flow regulating valve, and the micro process air pipe is provided with a third flow regulating valve; and the pressurizing gas pipes are provided with fourth flow regulating valves.
2. The die cutter steel strip continuous conditioning apparatus of claim 1, wherein the cooling nozzle is connected to a plurality of pressurized gas tubes.
3. A continuous tempering method for a die cutter steel belt, which is characterized in that the continuous tempering device for the die cutter steel belt is adopted according to claim 1 or 2;
heating the steel strip to an austenitizing temperature by a heating furnace, and entering a quenching chamber after the austenitizing transformation of the steel strip is completed; a cooling nozzle of the venturi tube structure sprays and sweeps the mixed gas flow on the surface of the steel strip; the gas exhausted from the quenching chamber and the gas source gas are subjected to heat exchange and temperature reduction and then are circulated to a cooling nozzle; the air source is pressurized, stabilized in pressure, subjected to heat exchange and temperature rise, and then enters the cooling nozzle to be mixed with the gas discharged from the quenching chamber to form a mixed gas flow; the steel strip is reduced from austenitizing temperature to quenching temperature; the steel strip enters a tempering furnace.
4. A die cutter steel strip continuous tempering method according to claim 3, wherein the austenitizing temperature of the steel strip is controlled to be: the temperature of the quenched steel belt is controlled at 880+/-30 ℃:400 ℃ +/-50 ℃; the temperature of the circulating gas is set at 280+/-30 ℃; the tempering furnace is controlled to have a temperature range of 350-400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711165198.9A CN107746928B (en) | 2017-11-21 | 2017-11-21 | Continuous tempering device and method for die-cutting knife steel belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711165198.9A CN107746928B (en) | 2017-11-21 | 2017-11-21 | Continuous tempering device and method for die-cutting knife steel belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107746928A CN107746928A (en) | 2018-03-02 |
| CN107746928B true CN107746928B (en) | 2024-04-12 |
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| JPS5484814A (en) * | 1977-11-15 | 1979-07-06 | Kleinewefers Gmbh | Cooling apparatus |
| CN1737167A (en) * | 2005-08-09 | 2006-02-22 | 中国科学院等离子体物理研究所 | The air current baking system of large size vacuum vessel and method |
| CN101818242A (en) * | 2010-04-06 | 2010-09-01 | 中冶南方(武汉)威仕工业炉有限公司 | High-temperature furnace roller adopting air cooling technology |
| CN103014309A (en) * | 2012-12-05 | 2013-04-03 | 中冶南方(武汉)威仕工业炉有限公司 | Cooling air supply device for cold-strip steel continuous annealing furnace |
| CN104602831A (en) * | 2012-07-02 | 2015-05-06 | 西马克·西马格公司 | Method and device for cooling surfaces in casting installations, rolling installations or other strip processing lines |
| CN106460081A (en) * | 2014-04-15 | 2017-02-22 | 奥钢联精密带钢有限公司 | Method and device for producing steel strip |
| CN208346226U (en) * | 2017-11-21 | 2019-01-08 | 上海信鹏印刷器材有限公司 | Die cutter steel band continuous refining device |
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2017
- 2017-11-21 CN CN201711165198.9A patent/CN107746928B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5484814A (en) * | 1977-11-15 | 1979-07-06 | Kleinewefers Gmbh | Cooling apparatus |
| CN1737167A (en) * | 2005-08-09 | 2006-02-22 | 中国科学院等离子体物理研究所 | The air current baking system of large size vacuum vessel and method |
| CN101818242A (en) * | 2010-04-06 | 2010-09-01 | 中冶南方(武汉)威仕工业炉有限公司 | High-temperature furnace roller adopting air cooling technology |
| CN104602831A (en) * | 2012-07-02 | 2015-05-06 | 西马克·西马格公司 | Method and device for cooling surfaces in casting installations, rolling installations or other strip processing lines |
| CN103014309A (en) * | 2012-12-05 | 2013-04-03 | 中冶南方(武汉)威仕工业炉有限公司 | Cooling air supply device for cold-strip steel continuous annealing furnace |
| CN106460081A (en) * | 2014-04-15 | 2017-02-22 | 奥钢联精密带钢有限公司 | Method and device for producing steel strip |
| CN208346226U (en) * | 2017-11-21 | 2019-01-08 | 上海信鹏印刷器材有限公司 | Die cutter steel band continuous refining device |
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| CN107746928A (en) | 2018-03-02 |
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