CN108677133A - A kind of the nitriding furnace rear chamber and its sealing cooling means of vacuum-pumping - Google Patents
A kind of the nitriding furnace rear chamber and its sealing cooling means of vacuum-pumping Download PDFInfo
- Publication number
- CN108677133A CN108677133A CN201810723685.0A CN201810723685A CN108677133A CN 108677133 A CN108677133 A CN 108677133A CN 201810723685 A CN201810723685 A CN 201810723685A CN 108677133 A CN108677133 A CN 108677133A
- Authority
- CN
- China
- Prior art keywords
- vacuum
- furnace
- rear chamber
- nitrogen
- nitriding furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005121 nitriding Methods 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 title claims abstract description 24
- 238000005086 pumping Methods 0.000 title claims abstract description 20
- 238000001816 cooling Methods 0.000 title claims abstract description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 83
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000012298 atmosphere Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003195 fascia Anatomy 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
Abstract
The present invention provides a kind of nitriding furnace rear chamber of vacuum-pumping and its sealing cooling means, nitriding furnace rear chamber includes that furnace body, nitrogen answer pressure pipeline, sealing fire door, vacuum suction pipeline, vacuum pump, after Sealing furnace goalkeeper's furnace sealing, air in vacuum pumped furnace body, nitrogen pipeline injects nitrogen inside again, and workpiece is then sent into furnace interior cooling.The present invention have many advantages, such as it is simple in structure, ingenious in design, easy to operation, reduce energy consumption, reduce cost.
Description
Technical field
The invention belongs to heating furnace fields, especially in regard to after a kind of nitriding furnace of the vacuum-pumping for heat-treatment production line
Room and its sealing cooling means.
Background technology
To make the parts after nitridation have good greyish white colored appearance, while preventing workpiece from deforming, from nitridation room to nitridation
It needs to be cooled down in protective atmosphere after stove rear chamber, traditional way is to rush nitrogen by big flow, is diluted by replacing
Indoor atmosphere after nitriding furnace, under normal circumstances the nitrogen ventilation of 5 cubes ms/h of the nitriding furnace rear chamber needs of 1 cube volume
Amount, to consume a large amount of nitrogen, in addition substitute mode ventilation can not thoroughly rinse indoor oxidation after nitriding furnace very much
Atmosphere.Handled workpiece color cannot reach ideal canescence, and the oxidation tint that articulate fascia shape is had on workpiece exists, and influences
The quality of workpiece.
Invention content
An object of the present invention be to provide it is a kind of it is simple in structure, ingenious in design, easy to operation, reduce energy consumption, reduce at
The nitriding furnace rear chamber of this vacuum-pumping.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：A kind of nitriding furnace rear chamber of vacuum-pumping comprising
There is the front and back furnace body penetrated through, being connected with nitrogen on the furnace body answers pressure pipeline, and the nitrogen answers pressure pipeline and is connected to the furnace body
Inside, for the side wall of the furnace body through there is rotary shaft, the rotary shaft driving conveyer belt walking, further includes having sealing fire door,
The sealing fire door is separately positioned on the front and back opening of the furnace body.
Further, further include having reinforced seal, the reinforced seal is coated on the end of the rotary shaft, to furnace body
It is sealed.
Further, it is additionally provided with vacuum suction pipeline on the furnace body.
Further, described vacuum suction pipeline one end is connected to the furnace interior, and the other end is connected with vacuum pump.
Further, it is additionally provided with vacuum valve outlet on the vacuum suction pipeline.
It is a further object of the present invention to provide a kind of nitriding furnace rear chambers of vacuum-pumping to seal cooling means, uses as follows
Step：
(1) workpiece is after the completion of nitrogenizing fore hearth heat treatment, first will be described before workpiece enters the cooling of nitriding furnace rear chamber
The sealing fire door at nitriding furnace rear chamber both ends is closed, while starting vacuum pump, and indoor air after the nitriding furnace is completely drawn out；
(2) after the completion of vacuum pumping, vacuum pump is closed, pressure pipeline is answered by the nitrogen and is discharged into nitrogen to furnace interior
Gas, when nitrogen is full of the furnace interior, and pressure reaches the pressure value set by vacuum valve outlet, stopping is passed through nitrogen
Gas, it is excessive if nitrogen pressure and if open the vacuum valve outlet and release extra nitrogen and pressure, be then shut off described true
Empty valve outlet；
(3) the sealing fire door for then opening the front side of the nitriding furnace rear chamber send workpiece to the stove by conveyer belt
Internal portion is cooled down, and Sealing furnace goalkeeper's workpiece that rear side is opened after the completion of cooling is seen off；
(4) circulation step (1) continuously cools down workpiece to (3).
Compared with prior art, the present invention has the advantages that：
1. simple in structure, ingenious in design, promote the use of suitable for industrial production and on a large scale.
2. reducing energy consumption, reducing cost, minimal amount nitrogen is only needed to protect after forvacuum mode, after being pressed again by nitrogen
Processing can be achieved the effect that by holding the positive pressure of nitriding furnace rear chamber, and the nitriding furnace rear chamber of 1 cube volume needs under normal circumstances
0.5-1 cubes m/h of nitrogen ventilation volume maintains positive pressure.
3. the quality of product is promoted, the nitrogen protection atmosphere equally used between the cup and rear chamber of nitriding furnace, and in nitrogen
Change workpiece that the cooling of stove rear chamber is completed when sending out outward, can not avoid having air and enter nitriding furnace rear chamber, therefore per subjob
It is required for vacuumizing to nitriding furnace rear chamber again before into nitriding furnace rear chamber and refills nitrogen.
Description of the drawings
Fig. 1 is the structural schematic diagram of the nitriding furnace rear chamber of vacuum-pumping of the present invention.
Reference numeral be include furnace body 10, nitrogen answer pressure pipeline 20, sealing fire door 30, be sucked by vacuum pipeline 40, vacuum pump 50,
Reinforced seal 60, vacuum valve outlet 70, rotary shaft 80.
Specific implementation mode
Technological means and the technique effect reached used by for the present invention is further explained, below in conjunction with attached drawing and implementation
Example elaborates.
With reference to figure 1, the present invention provides a kind of nitriding furnace rear chambers of vacuum-pumping comprising furnace body 10, nitrogen answer pressure pipe
Road 20, sealing fire door 30, vacuum suction pipeline 40, vacuum pump 50, reinforced seal 60, vacuum valve outlet 70, rotary shaft 80.Stove
The front and back perforation of body 10, opening is respectively arranged with sealing fire door 30 before and after furnace body 10, and sealing fire door 30 can be complete by furnace body 10
It is hermetically sealed.It is connected with nitrogen on furnace body 10 and answers pressure pipeline 20, nitrogen is answered pressure pipeline 20 and is connected to inside furnace body 10.The side of furnace body 10
For wall through having rotary shaft 80, rotary shaft 80 that conveyer belt walking, the end of rotary shaft 80 is driven to be coated with reinforced seal 60, skeleton is close
Rotary shaft 80 and the coupling part of furnace body 10 are sealed by envelope 60.40 one end of vacuum suction pipeline is connected to inside furnace body 10,
The other end is connected with vacuum pump 50.Vacuum valve outlet 70 is additionally provided on vacuum suction pipeline 40, vacuum valve outlet 70 is protected
Card can lay down the excessive pressure and nitrogen inside furnace body 10, and ensure will not be the free circulation of vital energy in the wrong direction into entrance furnace body 10 simultaneously
Portion.
The present invention also provides a kind of nitriding furnace rear chambers of vacuum-pumping to seal cooling means comprising following steps：
(1) workpiece is after the completion of nitrogenizing fore hearth heat treatment, first will nitridation before workpiece enters the cooling of nitriding furnace rear chamber
The sealing fire door at stove rear chamber both ends is closed, while starting vacuum pump, and indoor air after nitriding furnace is completely drawn out；
(2) after the completion of vacuum pumping, vacuum pump is closed, then pressure pipeline is answered by nitrogen and is discharged into nitrogen to furnace interior,
When nitrogen is full of furnace interior, and pressure reaches the pressure value set by vacuum valve outlet, stopping is passed through nitrogen, if nitrogen
Atmospheric pressure is excessive and then opens vacuum valve outlet and releases extra nitrogen and pressure, is then shut off vacuum valve outlet；
(3) then open nitriding furnace rear chamber front side sealing fire door, by workpiece by conveyer belt send to furnace interior into
Row cooling, Sealing furnace goalkeeper's workpiece that rear side is opened after the completion of cooling are seen off；
(4) circulation step (1) continuously cools down workpiece to (3).
The nitriding furnace rear chamber of the vacuum-pumping of the present invention seals cooling means, and nitrogen is filled after being vacuumized with nitriding furnace rear chamber
Hermetic seal, then it is used for cooling down workpiece, than continual spray nitrogen carries out the protection of nitrogen atmosphere while cooling down workpiece before it,
Nitrogen consumption is greatly reduced, the cost entirely produced is reduced.
The description with certain particularity detailed enough has been carried out to the present invention above.Ordinary skill in fields
Personnel are it should be understood that the description in embodiment is only exemplary, before without departing from true spirit and scope of the present invention
Put make it is all change should all belong to the scope of protection of the present invention.Scope of the present invention be by right want
Book is asked to be defined, rather than limited by the foregoing description in embodiment.
Claims (6)
1. a kind of nitriding furnace rear chamber of vacuum-pumping comprising have the front and back furnace body penetrated through, it is multiple to be connected with nitrogen on the furnace body
Pressure pipeline, the nitrogen answer pressure pipeline and are connected to the furnace interior, and the side wall of the furnace body, which runs through, rotary shaft, the rotation
Axis drives conveyer belt walking, it is characterised in that：It further includes having sealing fire door, and the sealing fire door is separately positioned on the furnace body
Front and back opening.
2. the nitriding furnace rear chamber of vacuum-pumping according to claim 1, it is characterised in that：It further includes having reinforced seal,
The reinforced seal is coated on the end of the rotary shaft, is sealed to furnace body.
3. the nitriding furnace rear chamber of vacuum-pumping according to claim 1, it is characterised in that：It is additionally provided on the furnace body true
Empty suction channel.
4. the nitriding furnace rear chamber of vacuum-pumping according to claim 3, it is characterised in that：Described vacuum suction pipeline one end
It is connected to the furnace interior, the other end is connected with vacuum pump.
5. the nitriding furnace rear chamber of vacuum-pumping according to claim 3, it is characterised in that：On the vacuum suction pipeline also
It is provided with vacuum valve outlet.
6. a kind of nitriding furnace rear chamber of vacuum-pumping seals cooling means, any claim institute in claim 1-5 is used
The nitriding furnace rear chamber stated, which is characterized in that it includes the following steps：
(1) workpiece is after the completion of nitrogenizing fore hearth heat treatment, before workpiece enters the cooling of nitriding furnace rear chamber, first by the nitridation
The sealing fire door at stove rear chamber both ends is closed, while starting vacuum pump, and indoor air after the nitriding furnace is completely drawn out；
(2) after the completion of vacuum pumping, vacuum pump is closed, pressure pipeline is answered by the nitrogen and is discharged into nitrogen to furnace interior, directly
It being full of the furnace interior to nitrogen, and when pressure reaches the pressure value set by vacuum valve outlet, stopping is passed through nitrogen, if
Nitrogen pressure is excessive, opens the vacuum valve outlet and releases extra nitrogen and pressure, is then shut off the vacuum valve exhaust
Mouthful；
(3) the sealing fire door for then opening the front side of the nitriding furnace rear chamber send workpiece to the furnace body by conveyer belt
Portion is cooled down, and Sealing furnace goalkeeper's workpiece that rear side is opened after the completion of cooling is seen off；
(4) circulation step (1) continuously cools down workpiece to (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810723685.0A CN108677133A (en) | 2018-07-04 | 2018-07-04 | A kind of the nitriding furnace rear chamber and its sealing cooling means of vacuum-pumping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810723685.0A CN108677133A (en) | 2018-07-04 | 2018-07-04 | A kind of the nitriding furnace rear chamber and its sealing cooling means of vacuum-pumping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108677133A true CN108677133A (en) | 2018-10-19 |
Family
ID=63813135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810723685.0A Pending CN108677133A (en) | 2018-07-04 | 2018-07-04 | A kind of the nitriding furnace rear chamber and its sealing cooling means of vacuum-pumping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108677133A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387479A (en) * | 2019-08-30 | 2019-10-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of preparation method of richness nitrogen manganese titanium base material |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04364A (en) * | 1990-04-17 | 1992-01-06 | Toyota Motor Corp | Gas soft nitriding method |
| JP2005272884A (en) * | 2004-03-23 | 2005-10-06 | Toyota Motor Corp | Gas nitriding method |
| CN2737805Y (en) * | 2004-06-07 | 2005-11-02 | 大连海事大学 | Ion-nitriding furnace |
| JP2008189955A (en) * | 2007-02-01 | 2008-08-21 | Dowa Thermotech Kk | Plasma nitriding treatment system |
| CN205258583U (en) * | 2015-11-26 | 2016-05-25 | 盐城丰东特种炉业有限公司 | Gas nitriding stove equipment |
| CN106319436A (en) * | 2016-10-26 | 2017-01-11 | 东北大学 | Vacuum carburization furnace and carburization method adopting vacuum carburization furnace |
| CN208649448U (en) * | 2018-07-04 | 2019-03-26 | 盐城丰东特种炉业有限公司 | A kind of nitriding furnace rear chamber of vacuum-pumping |
-
2018
- 2018-07-04 CN CN201810723685.0A patent/CN108677133A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04364A (en) * | 1990-04-17 | 1992-01-06 | Toyota Motor Corp | Gas soft nitriding method |
| JP2005272884A (en) * | 2004-03-23 | 2005-10-06 | Toyota Motor Corp | Gas nitriding method |
| CN2737805Y (en) * | 2004-06-07 | 2005-11-02 | 大连海事大学 | Ion-nitriding furnace |
| JP2008189955A (en) * | 2007-02-01 | 2008-08-21 | Dowa Thermotech Kk | Plasma nitriding treatment system |
| CN205258583U (en) * | 2015-11-26 | 2016-05-25 | 盐城丰东特种炉业有限公司 | Gas nitriding stove equipment |
| CN106319436A (en) * | 2016-10-26 | 2017-01-11 | 东北大学 | Vacuum carburization furnace and carburization method adopting vacuum carburization furnace |
| CN208649448U (en) * | 2018-07-04 | 2019-03-26 | 盐城丰东特种炉业有限公司 | A kind of nitriding furnace rear chamber of vacuum-pumping |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387479A (en) * | 2019-08-30 | 2019-10-29 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of preparation method of richness nitrogen manganese titanium base material |
| CN110387479B (en) * | 2019-08-30 | 2021-07-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of nitrogen-rich manganese-titanium-based material |
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| PB01 | Publication | ||
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Application publication date: 20181019 |