CN113528775A - Spray quenching device and application thereof in simulating lead bath heat treatment to obtain sorbite structure - Google Patents
Spray quenching device and application thereof in simulating lead bath heat treatment to obtain sorbite structure Download PDFInfo
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- CN113528775A CN113528775A CN202110864194.XA CN202110864194A CN113528775A CN 113528775 A CN113528775 A CN 113528775A CN 202110864194 A CN202110864194 A CN 202110864194A CN 113528775 A CN113528775 A CN 113528775A
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- 238000010791 quenching Methods 0.000 title claims abstract description 122
- 230000000171 quenching effect Effects 0.000 title claims abstract description 119
- 239000007921 spray Substances 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 title claims abstract description 24
- 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 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 72
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 18
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 abstract description 4
- 229910001566 austenite Inorganic materials 0.000 abstract description 2
- 238000009835 boiling Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- 230000006872 improvement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 206010027439 Metal poisoning Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 208000008127 lead poisoning Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- 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
- C21D1/60—Aqueous agents
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Abstract
The invention belongs to the technical field of quenching equipment, and particularly relates to a spray type quenching device and application thereof in simulating lead bath heat treatment to obtain sorbite tissues. The spray quenching device comprises a quenching cooling tank, a quenching liquid circulating tank, a quenching liquid conveying pipeline, a compressed air pipeline, a recovery pipeline, an air compressor and the like, wherein the quenching liquid is conveyed to a nozzle through the quenching liquid conveying pipeline, compressed air is conveyed to the nozzle through the compressed air pipeline, and atomized quenching liquid is sprayed to a sample through the nozzle; the spray quenching device is simple, easy to operate and suitable for industrial production; the quenching liquid of the high molecular polymer is adopted for spray quenching, the cooling capacity is strong, the heat conduction is fast, the cooling speed of the steel wire is fast, and the ferrite can be prevented from being separated out; then, as the concentration of the high molecular polymer increases, the steam film (film boiling) stage is long enough to slow down the cooling speed of the steel wire, so as to obtain the cooling condition similar to high-temperature lead bath quenching, and transform austenite into a sorbite structure.
Description
Technical Field
The invention belongs to the technical field of quenching equipment, and particularly relates to a spray type quenching device and a working method thereof, which are used for obtaining sorbite tissues by simulating lead bath heat treatment on steel (QS87Mn) for bridge cables.
Background
The heat treatment of the steel for the bridge cable is a unique heat treatment process for obtaining a sorbite structure, and aims to obtain a proper structure, strength and ductility so as to promote superior drawing performance. The heat treatment is mainly carried out in the drawing production process of downstream users, and the steel mill does not carry out heat treatment on products leaving the factory. In the production process, the component change of each batch of raw materials and the fluctuation of rolling equipment cause certain difference between the components and the surface quality of the produced batch, the quality problem often occurs after the heat treatment process of a user, and the time is generally months after the feedback of the user, so that the improvement of the smelting process and the rolling process cannot be obtained in time. The heat treatment of downstream users adopts molten lead medium as a quenching agent, so that the loss of expensive pure lead carrying effluent is large, the toxicity caused by lead fume and lead dust which are difficult to treat and recover is high, and the equipment and the maintenance cost thereof are high.
In order to overcome the defects of the prior art, solve the problem that a steel mill cannot simulate the heat treatment process and improve the quality level of steel for bridge cables, a heat treatment process method and equipment capable of simulating a lead bath are needed, the cost is reduced, the energy is saved, and the environmental pollution and the lead poisoning caused by the environmental pollution are eliminated; the process of the steel plant can be tracked and fed back in real time, so that the strength and the plasticity of the process reach the standard of lead bath quenching; the equipment is simple and easy, the operation is easy, and the quenching liquid performance is stable, thereby realizing the improvement of the quality of the steel for the bridge cable in a steel mill.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a spray quenching device, and the device is used for realizing simulated lead bath heat treatment of steel (QS87Mn) for bridge cables to obtain sorbite tissues.
The present invention achieves the above-described object by the following technical means.
A spray quenching device comprises a quenching cooling tank, a quenching liquid circulating tank, a quenching liquid conveying pipeline, a compressed air pipeline, a recovery pipeline and an air compressor, wherein nozzles are arranged at two ends of the quenching cooling tank; a three-phase electric pump is arranged in the quenching liquid circulating tank;
the quenching liquid conveying pipeline is connected with a three-phase electric pump in the quenching liquid circulating tank and nozzles at two ends of the quenching cooling tank; the quenching liquid conveying pipeline is provided with a first one-way valve and a first electromagnetic valve, and the first one-way valve is used for controlling the flow direction of liquid and preventing backflow; the first electromagnetic valve controls the flow speed and the flow of the liquid;
the compressed air pipeline is connected with an air compressor and nozzles at two ends of the quenching cooling tank to atomize the quenching liquid; the compressed air pipeline is provided with a second one-way valve and a second electromagnetic valve, and the second one-way valve is used for controlling the flow direction of the gas and preventing backflow; the second electromagnetic valve controls the flow speed and the flow of the gas;
the recovery pipeline is connected with the quenching cooling tank and the quenching liquid circulation tank, a gate valve is arranged on the recovery pipeline, and the quenching liquid can be recovered after the recovery pipeline is opened;
and a gate valve is also arranged on the compressed air pipeline to control the discharge of residual high-pressure gas in the pipeline.
The method for obtaining the sorbite structure by simulating the lead bath heat treatment of the steel (QS87Mn) for the bridge cable by using the spray quenching device comprises the following steps:
(1) pre-drawing a hot-rolled wire rod with the diameter phi of 14mm to the diameter phi of 7-8.2 mm, and preparing a test sample with the length of 150 mm;
(2) adopting a muffle furnace for austenitizing and heating treatment, heating the sample to 820 +/-10 ℃, and preserving the temperature for 30 min;
(3) in a spray quenching device, the sample is subjected to high-molecular quenching liquid spray quenching to obtain a sorbite structure.
The method specifically comprises the following steps: placing the sample in a quenching cooling tank, placing the quenching liquid in a quenching liquid circulating tank, starting a three-phase electric pump and an air compressor in the quenching liquid circulating tank, conveying the quenching liquid to a nozzle through a quenching liquid conveying pipeline, conveying compressed air to the nozzle through a compressed air pipeline, and spraying atomized quenching liquid to the sample through the nozzle;
the quenching liquid can be recycled to the quenching liquid circulating tank through a recycling pipeline;
the residual high-pressure gas in the compressed air pipeline is discharged through the gate valve.
The quenching liquid is an aqueous solution of water-soluble hydroxyethyl cellulose, the concentration of the quenching liquid is 1 wt%, and 5-10 wt% of sodium chloride is added, so that the quenching liquid has the advantages of strong cooling capacity, easiness in adjusting the cooling speed, prevention of sample cracking, no combustion, low cost, environmental friendliness and the like. The quenching liquid can obtain the same structure as that of the lead bath quenching process.
The simulated lead bath quenching process method is not only suitable for simulated heat treatment of steel (QS87Mn) for bridge cables, but also suitable for phase change experiments of other wires.
The invention has the beneficial effects that:
(1) the spray quenching device provided by the invention is simple, easy to operate and suitable for industrial production;
(2) the invention adopts the high molecular polymer quenching liquid for spray quenching, and the quenching liquid has strong cooling capacity and fast heat conduction, so the steel wire starts to be cooled at a fast speed, and ferrite can be prevented from being separated out. Then, as the concentration of the high molecular polymer increases, the steam film (film boiling) stage is long enough to slow down the cooling speed of the steel wire, so as to obtain the cooling condition similar to high-temperature lead bath quenching, and transform austenite into a sorbite structure.
Drawings
FIG. 1 is a schematic structural view of the spray quenching apparatus of the present invention.
FIG. 2 is a gold phase diagram of the sorbite structure of the samples prepared in the examples of the present invention.
The reference numerals are explained below:
1-quenching cooling tank, 2-nozzle, 3-quenching liquid circulation tank, 4-quenching liquid conveying pipeline, 5-compressed air pipeline, 6-recovery pipeline, 7-first one-way valve, 8-first electromagnetic valve, 9-second one-way valve, 10-second electromagnetic valve, 11-air compressor and 12-gate valve.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
Example 1
As shown in fig. 1, the spray quenching device of the present invention comprises a quenching cooling tank 1, a quenching liquid circulation tank 3, a quenching liquid delivery pipeline 4, a compressed air pipeline 5, a recovery pipeline 6 and an air compressor 11, wherein nozzles 2 are arranged at two ends of the quenching cooling tank 1; a three-phase electric pump is arranged in the quenching liquid circulating tank 3;
the quenching liquid conveying pipeline 4 is connected with a three-phase electric pump in the quenching liquid circulating tank 3 and nozzles at two ends of the quenching cooling tank 1; a first one-way valve 7 and a first electromagnetic valve 8 are arranged on the quenching liquid conveying pipeline 4, and the first one-way valve 7 is used for controlling the flow direction of liquid and preventing backflow; the first electromagnetic valve 8 controls the flow speed and flow of the liquid;
the compressed air pipeline 5 is connected with an air compressor 11 and nozzles at two ends of the quenching cooling groove 1 to atomize the quenching liquid; a second one-way valve 9 and a second electromagnetic valve 10 are arranged on the compressed air pipeline 5, and the second one-way valve 9 is used for controlling the flow direction of the gas and preventing backflow; the second electromagnetic valve 10 controls the flow speed and flow of the gas;
the recovery pipeline 6 is connected with the quenching cooling tank 1 and the quenching liquid circulating tank 3, is provided with a gate valve, and can recover the quenching liquid after being opened;
a gate valve 12 is also arranged on the compressed air pipeline 5 to control the discharge of residual high-pressure gas in the pipeline.
The method for obtaining the sorbite structure by simulating the lead bath heat treatment of the steel (QS87Mn) for the bridge cable by using the spray quenching device comprises the following steps:
(1) pre-drawing a hot-rolled wire rod with the diameter phi of 14mm to the diameter phi of 7-8.2 mm, and preparing a test sample with the length of 150 mm;
(2) adopting a muffle furnace for austenitizing and heating treatment, heating the sample to 820 ℃, and preserving the temperature for 30 min;
(3) in a spray quenching device, the sample is subjected to high-molecular quenching liquid spray quenching to obtain a sorbite structure.
The method specifically comprises the following steps: placing a sample in a quenching cooling tank 1, placing quenching liquid in a quenching liquid circulating tank 3, starting a three-phase electric pump and an air compressor 11 in the quenching liquid circulating tank 3, conveying the quenching liquid to a nozzle 2 through a quenching liquid conveying pipeline 4, conveying compressed air to the nozzle 2 through a compressed air pipeline 5, and spraying atomized quenching liquid to the sample through the nozzle 2;
the quenching liquid can be recycled to the quenching liquid circulating tank 3 through a recycling pipeline 6;
the high-pressure gas remaining in the compressed air pipe 5 is discharged through the gate valve 12.
The quenching liquid is water solution of water-soluble hydroxyethyl cellulose, the concentration is 1 wt%, and 5-10 wt% of sodium chloride is added.
The experimental results are shown in FIG. 2, which shows that the sorbite structure is obtained by the quenching process of the invention.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (6)
1. A spray quenching device is characterized by comprising a quenching cooling tank (1), a quenching liquid circulating tank (3), a quenching liquid conveying pipeline (4), a compressed air pipeline (5) and an air compressor (11), wherein nozzles (2) are arranged at two ends of the quenching cooling tank (1); a three-phase electric pump is arranged in the quenching liquid circulating tank (3);
the quenching liquid conveying pipeline (4) is connected with a three-phase electric pump in the quenching liquid circulating tank (3) and nozzles at two ends of the quenching cooling tank (1); a first one-way valve (7) and a first electromagnetic valve (8) are arranged on the quenching liquid conveying pipeline (4);
the compressed air pipeline (5) is connected with an air compressor (11) and nozzles at two ends of the quenching cooling tank (1) to atomize the quenching liquid; and a second one-way valve (9) and a second electromagnetic valve (10) are arranged on the compressed air pipeline (5).
2. The spray quenching apparatus according to claim 1, wherein a recovery pipe (6) is further provided to connect the quenching cooling tank (1) and the quenching liquid circulation tank (3), and a gate valve is provided on the recovery pipe (6).
3. The spray quenching apparatus according to claim 1, wherein a gate valve (12) is provided in the compressed air line (5).
4. Use of the spray quenching device according to any of claims 1 to 3 for simulating a lead bath heat treatment to obtain sorbite structures.
5. The use according to claim 4, characterized in that the obtaining of sorbite structure by simulating the lead bath heat treatment with steel QS87Mn for bridge cables is carried out by the following steps:
(1) pre-drawing a hot-rolled wire rod with the diameter phi of 14mm to the diameter phi of 7-8.2 mm, and preparing a test sample with the length of 150 mm;
(2) adopting a muffle furnace for austenitizing and heating treatment, heating the sample to 820 +/-10 ℃, and preserving the temperature for 30 min;
(3) in a spray quenching device, performing high-molecular quenching liquid spray quenching on a sample to obtain a sorbite tissue;
the method comprises the following specific steps: placing a sample in a quenching cooling tank (1), placing quenching liquid in a quenching liquid circulating tank (3), starting a three-phase electric pump and an air compressor (11) in the quenching liquid circulating tank (3), conveying the quenching liquid to a nozzle (2) through a quenching liquid conveying pipeline (4), conveying compressed air to the nozzle (2) through a compressed air pipeline (5), and spraying atomized quenching liquid to the sample through the nozzle (2).
6. The use according to claim 5, wherein in step (3), the quenching liquid is an aqueous solution of water-soluble hydroxyethylcellulose with a concentration of 1 wt% and 5-10 wt% of sodium chloride is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110864194.XA CN113528775A (en) | 2021-07-29 | 2021-07-29 | Spray quenching device and application thereof in simulating lead bath heat treatment to obtain sorbite structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110864194.XA CN113528775A (en) | 2021-07-29 | 2021-07-29 | Spray quenching device and application thereof in simulating lead bath heat treatment to obtain sorbite structure |
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| Publication Number | Publication Date |
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| CN113528775A true CN113528775A (en) | 2021-10-22 |
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| CN202110864194.XA Pending CN113528775A (en) | 2021-07-29 | 2021-07-29 | Spray quenching device and application thereof in simulating lead bath heat treatment to obtain sorbite structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201565478U (en) * | 2009-10-30 | 2010-09-01 | 宝钢集团新疆八一钢铁有限公司 | Hard-wire steel atomizing cooling device |
| CN102268517A (en) * | 2011-08-02 | 2011-12-07 | 大连海威热处理技术装备有限公司 | Air, air/water/frog, water spraying and water immersing combined and alternative quenching cooling system |
| CN104550275A (en) * | 2014-12-26 | 2015-04-29 | 钢铁研究总院 | Method and device for spray evaporation cooling of hot-rolled high-strength rebar |
| CN104561496A (en) * | 2014-12-25 | 2015-04-29 | 内蒙古科技大学 | Spray cooling experiment device for thermal treatment of steel rail |
| CN104818371A (en) * | 2015-04-17 | 2015-08-05 | 苏州铭德铝业有限公司 | Aluminum profile quenching system and quenching method |
| CN109867437A (en) * | 2019-03-27 | 2019-06-11 | 天津泓雅节能科技有限责任公司 | One kind being sprayed quenching tempering device and operating method by formula |
-
2021
- 2021-07-29 CN CN202110864194.XA patent/CN113528775A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201565478U (en) * | 2009-10-30 | 2010-09-01 | 宝钢集团新疆八一钢铁有限公司 | Hard-wire steel atomizing cooling device |
| CN102268517A (en) * | 2011-08-02 | 2011-12-07 | 大连海威热处理技术装备有限公司 | Air, air/water/frog, water spraying and water immersing combined and alternative quenching cooling system |
| CN104561496A (en) * | 2014-12-25 | 2015-04-29 | 内蒙古科技大学 | Spray cooling experiment device for thermal treatment of steel rail |
| CN104550275A (en) * | 2014-12-26 | 2015-04-29 | 钢铁研究总院 | Method and device for spray evaporation cooling of hot-rolled high-strength rebar |
| CN104818371A (en) * | 2015-04-17 | 2015-08-05 | 苏州铭德铝业有限公司 | Aluminum profile quenching system and quenching method |
| CN109867437A (en) * | 2019-03-27 | 2019-06-11 | 天津泓雅节能科技有限责任公司 | One kind being sprayed quenching tempering device and operating method by formula |
Non-Patent Citations (3)
| Title |
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| 于程歆等: "《淬火冷却技术及淬火介质》", 31 January 2010, 辽宁科学技术出版社 * |
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Application publication date: 20211022 |
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