CN108396124A - Simplicity improves double nozzle liquid nitrogen spray experiment devices of quenching velocity - Google Patents
Simplicity improves double nozzle liquid nitrogen spray experiment devices of quenching velocity Download PDFInfo
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- CN108396124A CN108396124A CN201810117784.4A CN201810117784A CN108396124A CN 108396124 A CN108396124 A CN 108396124A CN 201810117784 A CN201810117784 A CN 201810117784A CN 108396124 A CN108396124 A CN 108396124A
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- liquid nitrogen
- nitrogen spray
- double nozzle
- operating room
- experiment devices
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
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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
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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)
Abstract
The invention discloses a kind of easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity, it include liquid nitrogen source of supply, liquid nitrogen source of supply is connect through liquid nitrogen delivery pipe with liquid nitrogen spray, liquid nitrogen spray is symmetrically arranged in the left and right sidewall of liquid nitrogen spray operating room, and sample holding device and induction heating apparatus are equipped in liquid nitrogen spray operating room.Ingehious design and rational layout are carried out to key component such as induction heating apparatus, liquid nitrogen source of supply, flow controlling unit, liquid nitrogen delivery pipe, liquid nitrogen spray operating room, sample holding device and temperature thermocouple in the device of the invention, liquid nitrogen flow velocity, flow, cooling rate should be able to mutually be measured and many aspects such as injection uniformity accurately control, it can solve to measure the problems such as cooling velocity, quenching cooling velocity are inadequate, and uniformity is bad simultaneously.
Description
Technical field
The present invention relates to a kind of liquid nitrogen spray experiment device, especially a kind of easy double nozzle liquid for improving quenching velocity
Nitrogen injection experiment device.
Background technology
With the continuous development of Materials Science and Engineering technology, a large amount of scientific worker is dedicated to exploring the microcosmic of material
Structure studies the affecting laws of material mechanical performance.For widely used martensite steel, heterogeneous microstructure is more multiple
It is miscellaneous, and the scale of microstructure and pattern have significant impact to the mechanical property of martensite steel.In order to explore martensite
Organizing the influence to martensite steel mechanical property, the method generally used at present is adjusted by changing heat treatment process parameter
The pattern and microscopic dimensions of martensitic structure carry out Mechanics Performance Testing to the martensitic material with diverse microcosmic structure, from
And obtain the response relation between martensitic structure and mechanical property.In order to obtain tiny martensitic structure, need to improve horse
Cooling velocity in the quenching of family name's body, it is well known that liquid nitrogen cooling rate is quite high, but if sample is directly immersed in liquid nitrogen,
Since liquid nitrogen volatilization causes specimen surface that can form nitrogen film, nitrogen film shields the exchange of heat, is greatly unfavorable for improving
Cooling rate, therefore, in order to improve liquid nitrogen to quenching the heat exchange of sample and improving cooling rate as far as possible, needing to design one kind can
The experimental rig leaned in the case where acquisition is exceedingly fast cooling velocity, while ensureing the cooling uniformity of sample in cooling procedure
Experiment device.
Invention content
It is an object of the present invention to a kind of easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity.The dress
It sets in the case where acquisition is exceedingly fast cooling velocity, while ensureing the cooling uniformity of sample in cooling procedure.
Technical scheme of the present invention：A kind of easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity, including
There are liquid nitrogen source of supply, liquid nitrogen source of supply to be connect with liquid nitrogen spray through liquid nitrogen delivery pipe, liquid nitrogen spray is symmetrically arranged in liquid
Nitrogen sprays in the left and right sidewall of operating room, and sample holding device and induction heating apparatus are equipped in liquid nitrogen spray operating room.
The easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity above-mentioned, the sample holding device include
There is the groove being arranged at the top of liquid nitrogen spray operating room, punch-pin sliding block has been caught in groove, punch-pin sliding block is connected with L-shaped stick, L
Shape caput end is connected with sample.
The easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity above-mentioned, the sample tail portion is connected with heat
Galvanic couple.
The easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity above-mentioned, the induction heating apparatus are to set
It sets in the indoor induction coil of liquid nitrogen spray work, pushes punch-pin sliding block that sample can be pushed into induction coil along groove.
The easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity above-mentioned, the liquid nitrogen source of supply are high pressure
Liquid nitrogen container, high-pressure liquid nitrogen tank are equipped with flow controlling unit, and flow controlling unit includes flowmeter, air gauge and air pressure valve.
The easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity above-mentioned, the liquid nitrogen spray operating room
In left and right sidewall it is each it is oblique be arranged with 1 circular hole, liquid nitrogen spray in circular hole from stretching in liquid nitrogen spray operating room.
Simplicity above-mentioned improves double nozzle liquid nitrogen spray experiment devices of quenching velocity, and Universal connector is equipped in the circular hole
Head, universal joint both ends are separately connected liquid nitrogen delivery pipe and liquid nitrogen spray.
Simplicity above-mentioned improves double nozzle liquid nitrogen spray experiment devices of quenching velocity, is connected on the universal joint
Driving motor.
The easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity above-mentioned, the circular hole are 45 ° obliquely
Setting.
The easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity above-mentioned, the liquid nitrogen spray operating room is
Semi-closed structure.
Beneficial effects of the present invention：Compared with prior art, liquid nitrogen is used to carry out rapid quenching in order to realize, the present invention carries
For a kind of easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity, which uses the side of high-pressure liquid nitrogen injection
Method, high-pressure installation can not only improve the flowing that liquid nitrogen quenches specimen surface in high temperature, while high pressure may cause to high temperature
The vapor film rupture for quenching specimen surface, promotes heat in the exchange of specimen surface.Since injection effective area is by nozzle
Diameter dimension influences, and in order to ensure that liquid nitrogen is accurately ejected into specimen surface, adds as incuded to key component in the device of the invention
Thermal, liquid nitrogen source of supply, flow controlling unit, liquid nitrogen delivery pipe, liquid nitrogen spray operating room, sample holding device and thermometric
Thermocouple carries out ingehious design and rational layout, should be able to mutually measure liquid nitrogen flow velocity, flow, cooling rate and injection is uniform
Property etc. many aspects accurately controlled, while can solve measure cooling velocity, quenching cooling velocity it is inadequate, uniformity is bad
The problems such as.
Description of the drawings
Attached drawing 1 is the general structure schematic diagram of the present invention；
Attached drawing 2 is the structural schematic diagram of sample holding device；
Attached drawing 3 is the structural schematic diagram of liquid nitrogen spray operating room；
Reference numeral：1- liquid nitrogen sources of supply, 2- liquid nitrogen delivery pipes, 3- liquid nitrogen sprays, 4- liquid nitrogen sprays operating room, 5- grooves, 6-
Punch-pin sliding block, 7-L shape sticks, 8- samples, 9- thermocouples, 10- induction coils.
Specific implementation mode
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
The embodiment of the present invention：A kind of easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity, such as attached drawing
Include liquid nitrogen source of supply 1 shown in 1-3, liquid nitrogen source of supply 1 is connect through liquid nitrogen delivery pipe 2 with liquid nitrogen spray 3, and liquid nitrogen spray 3 is left
The right side is symmetrically disposed in the left and right sidewall of liquid nitrogen spray operating room 4, be equipped in liquid nitrogen spray operating room 4 sample holding device and
Induction heating apparatus.
During use, liquid nitrogen source of supply 1 is for controllably being exported low temperature liquid nitrogen；Liquid nitrogen delivery pipe 2 is being kept
Liquid nitrogen is delivered to through liquid nitrogen spray 3 inside liquid nitrogen spray operating room 4 by liquid nitrogen under the premise of not gasified, and sensing heating fills
The sample that can quickly heat and need to quench is set, superficial oxidation and the decarburization of sample can be reduced.Induction heating apparatus energization can
Sample is heated to austenitizing temperature or more, after keeping the temperature a period of time, sample is pushed to by fixation by sample holding device
When position is quenched, induction heating apparatus current supply circuit disconnects, and induction heating apparatus is stopped.Quenched sample can lead to
It crosses sample holding device sample is pushed into liquid nitrogen spray operating room 4, and is fixed at liquid nitrogen spray 3 and is quickly quenched
Fire.
The sample holding device includes the groove 5 being arranged on 4 top of liquid nitrogen spray operating room, is caught in groove 5
There are punch-pin sliding block 6, punch-pin sliding block 6 to be connected with L-shaped stick 7,7 head end of L-shaped stick is U-type groove, and heating sample, L-shaped stick are placed in U-type groove
7 and heating sample in U-type groove by gasket and being bolted, and it is fixed.During use, punch-pin is acted on by external force and is slided
On block 6, you can so that punch-pin sliding block 6 moves back and forth along groove 5, to drive the L-shaped stick 7 being connect with punch-pin sliding block 6 together
It is mobile, and sample is driven to be in different positions.The heating region that sample is in induction heating apparatus is inwardly can be, is displaced outwardly
Sample may make to be in the jeting area of liquid nitrogen spray 3.To rapidly realize the conversion of heating and quenching.
8 tail portion of the sample is connected with thermocouple 9, and transient measurement is carried out to the temperature of sample.It is surveyed during quenching
It has a try the cooling velocity of sample.
The induction heating apparatus is the induction coil 10 being arranged in liquid nitrogen spray operating room 4, is pushed along groove 5 convex
Sample 8 can be pushed into induction coil 10 by mode slider 6, since sample is in inside induction coil 10, in heating process
Ensure that the temperature at each position of sample can reach required temperature, ensures that each spot temperature is uniform.
The liquid nitrogen source of supply 1 is high-pressure liquid nitrogen tank, and high-pressure liquid nitrogen tank is equipped with flow controlling unit, flow controlling unit
Including flowmeter, air gauge and air pressure valve.Liquid nitrogen source of supply 1 is whole in the form of high pressure sealing liquid nitrogen container, including storage liquid nitrogen
Tank body, be arranged at tank outlet for adjusting the control valve of liquid nitrogen output quantity, air pressure valve and display tank interior are surplus
The display device of extraction raffinate nitrogen quantity.As key member therein, control valve is required to accurately control provided Low Temperature Liquid
The flow of nitrogen, because this directly influences the cooling rate problem in quenching process；Air pressure in air pressure valve reed time controll liquid nitrogen container body
Problem, when pot liquid air pressure is excessively high, air pressure valve, which can automatically open, carries out decompression processing, ensures that the air pressure in tank maintains centainly
Value.Timing monitoring is carried out to liquid nitrogen flow by flowmeter.
In the left and right sidewall of the liquid nitrogen spray operating room 4 it is each it is oblique be arranged with 1 circular hole, liquid nitrogen spray 3 is from circular hole
In stretch in liquid nitrogen spray operating room 4.Universal joint is equipped in the circular hole, universal joint both ends are separately connected liquid nitrogen conveying
Pipe 2 and liquid nitrogen spray 3.It is connected with driving motor on the universal joint.The circular hole is arranged for 45 ° obliquely.The liquid nitrogen
Injection operating room 4 is semi-closed structure.Universal joint adds for fixing liquid nitrogen delivery pipe and ensureing that liquid nitrogen can be equably injected in
On heat examination sample, the baffle arrangement of liquid nitrogen spray operating room 4, can stop the liquid nitrogen splashing frostbite that ejects other people, play protectiveness
Effect, the setting can make liquid nitrogen spray 3 do not generated in course of injection swing with fall off, when being accurately positioned eject position
Prevent unnecessary safety accident.Splashing range when liquid nitrogen spray can be effectively ensured in semienclosed liquid nitrogen spray operating room 4,
Liquefied ammonia will not be caused to be blocked in working chamber simultaneously.
The simplicity of the present invention improves in double nozzle liquid nitrogen spray experiment devices of quenching velocity, wherein induction heating apparatus
For the sample for needing to quench to be heated to austenitizing temperature or more；Liquid nitrogen source of supply 1 is for controllably giving low temperature liquid nitrogen
With output；Flow cell on liquid nitrogen source of supply 1 is used to control the speed and flow of liquid nitrogen spray；Liquid nitrogen delivery pipe 2 is being kept
Liquid nitrogen is delivered to through liquid nitrogen spray 3 in liquid nitrogen spray operating room 4 by liquid nitrogen under the premise of not gasified, liquid nitrogen spray operating room
4 include semiclosed working cavity, and working chamber is semi-enclosed metal box, opens that there are two certain obliquely at left and right sides of box
The circular hole of angle, for circular hole for placing liquid nitrogen delivery pipe 2, the universal joint in circular hole can accurately control liquid nitrogen spray position
It sets, specimen surface after guarantee liquid nitrogen can equably be sprayed to heating.Liquid nitrogen spray process is completed in semiclosed working cavity,
Splashing range when liquid nitrogen spray can be effectively ensured in semienclosed working chamber, while liquefied ammonia will not be caused to be blocked up in working chamber
Plug.When liquefied ammonia sprays, by the flow controlling unit on liquid nitrogen source of supply 1, can freely adjust liquid nitrogen jet velocity and
Injection flow ensures the fast exchange of the rupture and heat and air of liquid nitrogen vapor film, realizes that low temperature liquid nitrogen is equal on sample 8
The purpose of marquench is realized in even cooling effect.Sample after heating quickly can be placed on liquid by sample holding device
3 position of nitrogen nozzle is simultaneously fixed.In order to test quenching cooling velocity, the present apparatus is used is welded on 8 tail portion of sample by thermocouple 9
Method measure temperature measurement, to measure obtain quenching cooling velocity.Device through the invention can be realized quickly
Heating, regulation and control liquid nitrogen spray speed, accurate measure quench cooling velocity, are accurately positioned quenching sample and realize the super cooling rate of quenching
Purpose provides safe and reliable experimental provision to obtain the martensitic structure under the conditions of high cooling rate.
Claims (10)
1. a kind of easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity, it is characterised in that：Include that liquid nitrogen supplies
Ying Yuan（1）, liquid nitrogen source of supply（1）Through liquid nitrogen delivery pipe（2）With liquid nitrogen spray（3）Connection, liquid nitrogen spray（3）Symmetrically set
It sets in liquid nitrogen spray operating room（4）Left and right sidewall on, liquid nitrogen spray operating room（4）It is interior to add equipped with sample holding device and induction
Thermal.
2. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 1, feature exist
In：The sample holding device includes to be arranged in liquid nitrogen spray operating room（4）Groove on top（5）, groove（5）In be caught in
There is punch-pin sliding block（6）, punch-pin sliding block（6）It is connected with L-shaped stick（7）, L-shaped stick（7）Head end is connected with sample（8）.
3. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 2, feature exist
In：The sample（8）Tail portion is connected with thermocouple（9）.
4. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 2, feature exist
In：The induction heating apparatus is to be arranged in liquid nitrogen spray operating room（4）Interior induction coil（10）, along groove（5）It pushes
Punch-pin sliding block（6）It can be by sample（8）It is pushed into induction coil（10）In.
5. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 1, feature exist
In：The liquid nitrogen source of supply（1）For high-pressure liquid nitrogen tank, high-pressure liquid nitrogen tank is equipped with flow controlling unit, flow controlling unit packet
Include flowmeter, air gauge and air pressure valve.
6. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 1, feature exist
In：The liquid nitrogen spray operating room（4）Left and right sidewall on each oblique be arranged with 1 circular hole, liquid nitrogen spray（3）From circular hole
Stretch to liquid nitrogen spray operating room（4）It is interior.
7. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 6, feature exist
In：Universal joint is equipped in the circular hole, universal joint both ends are separately connected liquid nitrogen delivery pipe（2）With liquid nitrogen spray（3）.
8. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 7, feature exist
In：It is connected with driving motor on the universal joint.
9. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 6, feature exist
In：The circular hole is arranged for 45 ° obliquely.
10. the easy double nozzle liquid nitrogen spray experiment devices for improving quenching velocity according to claim 1, feature exist
In：The liquid nitrogen spray operating room（4）For semi-closed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810117784.4A CN108396124B (en) | 2018-02-06 | 2018-02-06 | Double-nozzle liquid nitrogen injection experimental device capable of simply and conveniently improving quenching speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810117784.4A CN108396124B (en) | 2018-02-06 | 2018-02-06 | Double-nozzle liquid nitrogen injection experimental device capable of simply and conveniently improving quenching speed |
Publications (2)
| Publication Number | Publication Date |
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| CN108396124A true CN108396124A (en) | 2018-08-14 |
| CN108396124B CN108396124B (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810117784.4A Active CN108396124B (en) | 2018-02-06 | 2018-02-06 | Double-nozzle liquid nitrogen injection experimental device capable of simply and conveniently improving quenching speed |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5477213A (en) * | 1977-12-02 | 1979-06-20 | Hitachi Ltd | Bright annealing apparatus |
| CN101182593A (en) * | 2007-12-07 | 2008-05-21 | 东北大学 | Gas stove outer circulation cooling method of double chamber atmosphere pressure hardening furnace and cooling system thereof |
| CN204211782U (en) * | 2014-10-28 | 2015-03-18 | 郑州市嵩阳煤机制造有限公司 | Sprocket wheel thermal treatment unit |
| CN204676120U (en) * | 2015-05-22 | 2015-09-30 | 南京飞燕活塞环股份有限公司 | A kind of mandrel hardening apparatus by high frequency current |
| CN206916195U (en) * | 2017-06-08 | 2018-01-23 | 常州艾柯轧辊有限公司 | For improving the liquid nitrogen deep device of the roll barrel depth of quenching |
-
2018
- 2018-02-06 CN CN201810117784.4A patent/CN108396124B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5477213A (en) * | 1977-12-02 | 1979-06-20 | Hitachi Ltd | Bright annealing apparatus |
| CN101182593A (en) * | 2007-12-07 | 2008-05-21 | 东北大学 | Gas stove outer circulation cooling method of double chamber atmosphere pressure hardening furnace and cooling system thereof |
| CN204211782U (en) * | 2014-10-28 | 2015-03-18 | 郑州市嵩阳煤机制造有限公司 | Sprocket wheel thermal treatment unit |
| CN204676120U (en) * | 2015-05-22 | 2015-09-30 | 南京飞燕活塞环股份有限公司 | A kind of mandrel hardening apparatus by high frequency current |
| CN206916195U (en) * | 2017-06-08 | 2018-01-23 | 常州艾柯轧辊有限公司 | For improving the liquid nitrogen deep device of the roll barrel depth of quenching |
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|---|---|
| CN108396124B (en) | 2020-08-25 |
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