CN104651584A - Method and device for eliminating thermal-treatment quenching steam membrane - Google Patents
Method and device for eliminating thermal-treatment quenching steam membrane Download PDFInfo
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- CN104651584A CN104651584A CN201510076477.2A CN201510076477A CN104651584A CN 104651584 A CN104651584 A CN 104651584A CN 201510076477 A CN201510076477 A CN 201510076477A CN 104651584 A CN104651584 A CN 104651584A
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- quenching
- ultrasonic
- steel plate
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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
- C21D1/673—Quenching devices for die 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
- C21D1/62—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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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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)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Control Of Heat Treatment Processes (AREA)
Abstract
The invention relates to a method for eliminating a thermal-treatment quenching steam membrane. The method comprises the following steps: arranging an ultrasonic device above a quenching press steel plate pressing device in a thermal treatment production line; heating a steel plate to the temperature of 800 to 1000 DEG C in nine stages by a thermal treatment furnace; sending to a quenching press by a roller way; setting the pressure of a hydraulic system to be 0.5MPa to 1.0MPa; pressing the steel plate; simultaneously starting a water spraying device and the ultrasonic device of which the ultrasonic frequency is 20000Hz to 50000Hz by using a PLC control system; and simultaneously shutting down the water spraying device and the ultrasonic device after the quenching is ended. The ultrasonic device comprises an energy converter vibration box and an ultrasonic signal generator which are connected with each other by a wire; compared with the prior art, the method disclosed by the invention has the beneficial effects that the quenching press is provided with an ultrasonic vibration box for effectively breaking and eliminating the steam membrane generated in a cooling medium and increasing the cooling speed and the quenching uniformity, so that the aim of remarkably increasing the hardness, strength and wear resistance of a work piece is realized.
Description
Technical field
The present invention relates to heat-treatment quenching technical field, particularly relate to a kind of for pressing and quenching method quenching time eliminate method and the device of heat-treatment quenching steam film.
Background technology
Quenching technology is that steel is heated to a certain temperature, keeps certain hour, cools rapidly afterwards, to obtain the thermal treatment process of martensite or bainite in heat-eliminating medium.Object improves hardness, intensity, wear resisting property to meet the Practical Performance of material.The hardness that speed of cooling in quenching medium and homogeneity obtain material, intensity, wear resistance play a key effect.
Material can be divided into three phases when quenching-in water: the first stage is called steam film cooling stages.This stage, when occurring in material invasion water, material surface defined one deck steam film.By steam film heat release, thermal conduction is quite slow.Subordinate phase is boiling stage.This stage does not form continuous print steam film, and some vapor condenses becomes liquid, and new liquid is converted into steam again, and its result forms a kind of boiling phenomenon of interruption.Phase III is called convection current cooling stages.This stage does not have steam to be formed, and is cooled by liquid conductive and convection current.
Not only the existence of steam film has had a strong impact on thermal conduction but also can produce a large amount of temperature heads, make again cooling surface uneven while of not only making speed of cooling slack-off, the steam film that produces of first, second stage is eliminated if can effectively break, significantly heat treatment efficiency be will promote, and the hardness of material, intensity and wear resistance significantly improved.
Summary of the invention
The invention provides a kind of method and the device of eliminating heat-treatment quenching steam film, Quenching press arranges ultrasonic vibration box, effectively break the steam film eliminated and produce in heat-eliminating medium, improve the homogeneity of speed of cooling and quenching, reach the object significantly improving workpiece hardness, intensity and wear resistance.
In order to achieve the above object, the present invention realizes by the following technical solutions:
Eliminate a method for heat-treatment quenching steam film, comprise the steps:
Ultrasonic unit is established on heat-treatment production line Quenching press steel plate top, steel plate sends into Quenching press by roller-way after heat treatment furnace nine sections is heated to 800 ~ 1000 DEG C, hydraulic efficiency system setting pressure is that steel plate compresses by 0.5 ~ 1.0MPa, PLC control system starts waterworks and ultrasonic unit simultaneously, ultrasonic frequency is 20000 ~ 50000Hz, and quenching terminates rear waterworks and ultrasonic unit is closed simultaneously.
Described ultrasonic frequency is set as 28000Hz.
For realizing a kind of device eliminating the method for heat-treatment quenching steam film, comprise the transverter Vibration Box and ultrasonic signal generator that are connected by wire, described transverter Vibration Box is become by box body, ultrasonic transducer and head group of shaking, and multiple transverter Vibration Box is distributed in the fixed frame above Quenching press.
Described ultrasonic signal generator is electrically connected with PLC control system.
Described ultrasonic transducer output terminal is parallel with anti-varistor, and the output frequency of ultrasonic transducer is 20000 ~ 50000Hz.
Described transverter Vibration Box quantity is 16 ~ 30.
Compared with prior art, the invention has the beneficial effects as follows:
1) utilize ultrasonic vibration box effectively to break, eliminate the steam film produced in heat-eliminating medium, thus improve the homogeneity of speed of cooling and quenching, after quenching, workpiece strength rises to 7.5 (its benchmark is for 1 with 20 DEG C of static water quenching intensity), tensile strength adds 10%, hardness adds 5.4HRC, and abrasion resistance there has also been and significantly improves;
2) ultrasonic transducer acts on quenchant and material surface by oscillator, and mechanical q-value is high, and efficiency of conversion is high;
3) ultrasonic generator output terminal anti-varistor in parallel, oscillator loading is pure resistance, and output efficiency is high.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the structure of device of the present invention.
Fig. 2 is the A direction view in Fig. 1.
Fig. 3 is the relation curve of ultrasonic frequency and steel plate stretching intensity.
Fig. 4 is the relation curve of ultrasonic frequency and steel plate hardness.
In figure: 1. Quenching press fixed frame 2. transverter Vibration Box 21. box body 22. ultrasonic transducer 23. shakes 3. ultrasonic signal generator 4.PLC housing 5. roller-way
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Eliminate a method for heat-treatment quenching steam film, comprise the steps:
Ultrasonic unit is established above heat-treatment production line Quenching press hydraulic efficiency plant, steel plate sends into Quenching press by roller-way 5 after heat treatment furnace nine sections is heated to 800 ~ 1000 DEG C, hydraulic efficiency system setting pressure is that steel plate compresses by 0.5 ~ 1.0MPa, PLC control system starts waterworks and ultrasonic unit simultaneously, ultrasonic frequency is 20000 ~ 50000Hz, and quenching terminates rear waterworks and ultrasonic unit is closed simultaneously.
Described ultrasonic frequency is set as 28000Hz.
See Fig. 1, it is structural representation of the present invention, a kind of device eliminating heat-treatment quenching steam film of the present invention, comprise the transverter Vibration Box 2 and ultrasonic signal generator 3 that are connected by wire, described transverter Vibration Box 2 23 to be made up of, in the fixed frame 1 of equal 2 cloth of multiple transverter Vibration Box above Quenching press box body 21, ultrasonic transducer 22 and shaking.
Described ultrasonic signal generator 3 is electrically connected with PLC control system.
Described ultrasonic transducer 22 output terminal is parallel with anti-varistor, and the output frequency of ultrasonic transducer 22 is 20000 ~ 50000Hz.
Described transverter Vibration Box 2 quantity is 16 ~ 30.
When hard surfacing process is carried out for large size steel plate, due to workpiece big and heave, heating need be adopted, pressure quenches heat-treatment production line, mainly comprises feeding device, body of heater heating unit, Quenching press, discharging and wheelwork, pressing machine, firing system and Controlling System etc.Quenching press is the key equipment of this production line, and the pressure determining steel plate to the clamping of steel plate and water-spraying control process is quenched quality.
The workflow of Quenching press is: steel plate is after body of heater heating, by transmission system, workpiece is transported to the correct position of press, through hydraulic efficiency system workpiece lifting put in place and compress, then start water spray system to cool, water spraying time is determined by processing requirement, stop water spray after completing quenching, workpiece drops on roller-way, sends Quenching press by transmission system.
The present invention is applied on Quenching press, and start ultrasonic signal generator 3 while water spray and produce high frequency electrical signal, high frequency electrical signal is converted into the mechanical wave of certain frequency by ultrasonic transducer 22, then 23 acts on quenchant and material surface by shaking; Ultrasonic vibration box 2 send out high frequency sound wave quenchant and material surface all covered, produce cavitation phenomenon simultaneously, form shockwave, effectively can break and eliminate the steam film produced in quenching process, hardening liquid is evenly distributed, improve speed of cooling and quenching uniformity, and the hardness of workpiece, intensity and wear resistance can be significantly improved.
Seeing Fig. 3, is the relation curve of ultrasonic frequency and steel plate stretching intensity.Seeing Fig. 4, is the relation curve of ultrasonic frequency and steel plate hardness.The power of ultrasonic transducer 22 all can meet service requirements at 20000 ~ 50000Hz, but according to the impact of different ultrasonic frequency on workpiece tensile strength and hardness, and the tensile strength worked when frequency is 28000Hz and hardness can reach or close to maximum.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention are not limited to following embodiment.In following embodiment, method therefor is ordinary method if no special instructions.
[embodiment 1]
The present invention is adopted to carry out quench treatment to steel plate, the fixed frame 1 of Quenching press is evenly fixed 3 row 8 and arranges totally 24 transverter Vibration Boxes 2 (as shown in Figure 2), transverter Vibration Box 2 connects PLC control cabinet 4 by ultrasonic signal generator 3, steel plate is sent into after heat treatment furnace heats by roller-way 5 and is entered Quenching press, after steel plate is compacted, control water spray by PLC control system and start device of the present invention simultaneously, processing parameter is as follows:
Steel plate thickness of slab: 6mm;
Heat treatment furnace is nine sections of heating, and Heating temperature is set as: 890 DEG C-890 DEG C-900 DEG C-900 DEG C-908 DEG C-908 DEG C-910 DEG C-910 DEG C-900 DEG C;
Pressure setting: 0.6MPa;
Ultrasonic frequency sets: 28 kilo hertzs;
After not using ultrasonic unit and using supersonic quenching, the mechanical property of steel plate contrasts, as shown in the table:
[embodiment 2]
The present invention is adopted to carry out quench treatment to steel plate, the fixed frame 1 of Quenching press is evenly fixed 3 row 8 and arranges totally 24 transverter Vibration Boxes 2, transverter Vibration Box 2 connects PLC control cabinet 4 by ultrasonic signal generator 3, steel plate is sent into after heat treatment furnace heats by roller-way 5 and is entered Quenching press, after steel plate is compacted, control water spray by PLC control system and start device of the present invention simultaneously, processing parameter is as follows:
Thickness of slab: 9mm;
Heat treatment furnace is nine sections of heating, and Heating temperature sets: 890 DEG C-890 DEG C-900 DEG C-900 DEG C-908 DEG C-908 DEG C-910 DEG C-910 DEG C-900 DEG C;
Pressure setting: 0.7MPa;
Ultrasonic frequency sets: 32 kilo hertzs;
After not using ultrasonic unit and using supersonic quenching, the mechanical property of steel plate contrasts, as shown in the table:
[embodiment 3]
The present invention is adopted to carry out quench treatment to steel plate, the fixed frame 1 of Quenching press is evenly fixed 3 row 8 and arranges totally 24 transverter Vibration Boxes 2, transverter Vibration Box 2 connects PLC control cabinet 4 by ultrasonic signal generator 3, steel plate is sent into after heat treatment furnace heats by roller-way 5 and is entered Quenching press, after steel plate is compacted, control water spray by PLC control system and start device of the present invention simultaneously, processing parameter is as follows:
Thickness of slab: 12mm;
Heat treatment furnace is nine sections of heating, and Heating temperature is set as: 910 DEG C-900 DEG C-900 DEG C-908 DEG C-908 DEG C-910 DEG C-910 DEG C-900 DEG C;
Pressure setting: 0.8MPa;
Ultrasonic frequency sets: 39 kilo hertzs;
After not using ultrasonic unit and using supersonic quenching, the mechanical property of steel plate contrasts, as shown in the table:
Claims (6)
1. eliminate a method for heat-treatment quenching steam film, it is characterized in that, comprise the steps:
Ultrasonic unit is established on heat-treatment production line Quenching press top, steel plate sends into Quenching press by roller-way after heat treatment furnace nine sections is heated to 800 ~ 1000 DEG C, hydraulic efficiency system setting pressure is that steel plate compresses by 0.5 ~ 1.0MPa, PLC control system starts waterworks and ultrasonic unit simultaneously, ultrasonic frequency is 20000 ~ 50000Hz, and quenching terminates rear waterworks and ultrasonic unit is closed simultaneously.
2. a kind of device eliminating heat-treatment quenching steam film according to claim 1, it is characterized in that, described ultrasonic frequency is set as 28000Hz.
3. for realizing a kind of device eliminating heat-treatment quenching steam film according to claim 1, it is characterized in that, comprise the transverter Vibration Box and ultrasonic signal generator that are connected by wire, described transverter Vibration Box is become by box body, ultrasonic transducer and head group of shaking, and multiple transverter Vibration Box is distributed in the fixed frame above Quenching press.
4. a kind of device eliminating heat-treatment quenching steam film according to claim 3, it is characterized in that, described ultrasonic signal generator is electrically connected with PLC control system.
5. a kind of device eliminating heat-treatment quenching steam film according to claim 3, is characterized in that, described ultrasonic transducer output terminal is parallel with anti-varistor, and the output frequency of ultrasonic transducer is 20000 ~ 50000Hz.
6. a kind of device eliminating heat-treatment quenching steam film according to claim 3, is characterized in that, described transverter Vibration Box quantity is 16 ~ 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510076477.2A CN104651584A (en) | 2015-02-13 | 2015-02-13 | Method and device for eliminating thermal-treatment quenching steam membrane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510076477.2A CN104651584A (en) | 2015-02-13 | 2015-02-13 | Method and device for eliminating thermal-treatment quenching steam membrane |
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| CN104651584A true CN104651584A (en) | 2015-05-27 |
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| CN201510076477.2A Pending CN104651584A (en) | 2015-02-13 | 2015-02-13 | Method and device for eliminating thermal-treatment quenching steam membrane |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702110A (en) * | 2017-02-27 | 2017-05-24 | 鞍钢集团工程技术有限公司 | Multifunctional top-bottom two-way liquid spraying quenching experiment device and method |
| CN113106229A (en) * | 2021-04-16 | 2021-07-13 | 东北大学秦皇岛分校 | Device for eliminating steam film and using method |
| CN113512633A (en) * | 2021-08-04 | 2021-10-19 | 长春电子科技学院 | Intelligent water circulating device for heat treatment |
Citations (5)
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| JPS5424687B2 (en) * | 1974-09-07 | 1979-08-23 | ||
| WO2005098055A1 (en) * | 2004-04-07 | 2005-10-20 | Oriental Engineering Co., Ltd. | Metal part cooling method, metal part producing method, and metal part cooling device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106702110A (en) * | 2017-02-27 | 2017-05-24 | 鞍钢集团工程技术有限公司 | Multifunctional top-bottom two-way liquid spraying quenching experiment device and method |
| CN106702110B (en) * | 2017-02-27 | 2018-08-07 | 鞍钢集团工程技术有限公司 | A kind of multi-functional quenching experimental device of the two-way hydrojet in top bottom and method |
| CN113106229A (en) * | 2021-04-16 | 2021-07-13 | 东北大学秦皇岛分校 | Device for eliminating steam film and using method |
| CN113106229B (en) * | 2021-04-16 | 2022-04-12 | 东北大学秦皇岛分校 | Device for eliminating steam film and using method |
| CN113512633A (en) * | 2021-08-04 | 2021-10-19 | 长春电子科技学院 | Intelligent water circulating device for heat treatment |
| CN113512633B (en) * | 2021-08-04 | 2022-09-06 | 长春电子科技学院 | Intelligent water circulating device for heat treatment |
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Application publication date: 20150527 |