CN205443427U - Nitriding furnace - Google Patents
Nitriding furnace Download PDFInfo
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- CN205443427U CN205443427U CN201620260294.6U CN201620260294U CN205443427U CN 205443427 U CN205443427 U CN 205443427U CN 201620260294 U CN201620260294 U CN 201620260294U CN 205443427 U CN205443427 U CN 205443427U
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Abstract
The utility model discloses a nitriding furnace, including stove outer covering (1), stove courage (2) and bell (3), stove outer covering (1) is upper portion open -ended barrel, stove courage (2) are located in stove outer covering (1), the opening part of stove outer covering (1) is located in bell (3), be connected with elevating system (4) on bell (3), be equipped with between stove outer covering (1) and stove courage (2) thermal -insulated heat preservation (5), the inboard of thermal -insulated heat preservation (5) is equipped with heating element (6), be equipped with motor (7) and thermocouple (9) on bell (3), the lower extreme of motor (7) is equipped with blade (10), its characterized in that: be equipped with material frame (11) in stove courage (2), be used for air inlet unit who lets in and the guiding subassembly that is used for carrying on the drainage to nitridation gas bottom the gaseous follow stove courage of nitridation (2). This nitriding furnace leakproofness is good, the product nitrogenize is even, the product quality behind the nitrogen treatment is high.
Description
Technical field
This utility model belongs to technical field of heat treatment equipment, particularly relates to a kind of nitriding furnace.
Background technology
Nitrogen treatment is one (500 DEG C ~ 600 DEG C) at a certain temperature, makes nitrogen-atoms penetrate into workpiece surface and form the chemical heat treatment process of Fe-N Alloys in certain medium.The goods that via nitride processes have wearability, fatigue durability, corrosion resistance and the resistant to elevated temperatures characteristic of excellence.Nitridation has three processes: (1) is strengthened along with the rising of temperature, the degree of decomposition of ammonia, generates activated nitrogen atom；(2) steel Surface absorption nitrogen-atoms, first dissolves and forms saturated solid solution, form nitride the most again；(3) nitrogen is diffused to steel internal layer depths from surface zone of saturation, forms the nitration case of certain depth.
Nitriding furnace is by common equipment during nitrogen treatment, utilizes nitriding furnace that part carries out nitrogen treatment and is generally divided into intensification, is incubated and cools down three processes.The ammonia in ammonia bottle through air relief valve in temperature-rise period, it is passed through in nitriding furnace by ammonia cabinet (ammonia drying cupboard).When reaching requirement temperature in nitriding furnace, nitridation process has been put into holding stage.According to nitriding process specification, regulate the correct and stable of ammonia flow, holding temperature and resolution ratio.Insulation terminates, has a power failure cooling time, it is necessary to continue logical ammonia, keep retort to have certain malleation, prevent air from entering and make piece surface generation oxidation tint.For general part, when temperature drops to below 450 DEG C in tank, oven door opening can be accelerated cooling.The part tighter to deformation requirements, can furnace cooling.
Traditional nitriding furnace is in part nitridation process, and particularly high-volume dense workpiece nitridation occurs the uneven situation about underusing with ammonia of nitridation often.In ammonia enters into retort, residence time is short, and the intensive flowing putting workpiece interference air-flow, ammonia in retort can not flow distribution uniformly, to such an extent as to workpiece nitridation situation is poor, and the workpiece being much placed on internal layer nitrogenizes uneven, affects the quality of workpiece.
It addition, existing nitriding furnace is when using furnace cooling, cooling procedure often produces on workpiece the more nitride of distribution in veiny.The existence of veiny distribution nitride so that decrease of fatigue strength when workpiece uses, adds its fragility simultaneously, affects product quality.In addition, the problem that existing nitriding furnace often there is also poor sealing.
Utility model content
Technical problem to be solved in the utility model is, overcomes the deficiency and defect mentioned in background above technology, it is provided that the nitriding furnace that a kind of good airproof performance, product nitridation product quality uniformly, after nitrogen treatment is high.
For solving above-mentioned technical problem, the technical scheme that the utility model proposes is:
A kind of nitriding furnace, including furnace shell, flue and bell, described furnace shell is the cylinder of upper opening, flue is located in furnace shell, bell is located at the opening part of furnace shell, connect on bell and have elevating mechanism, insulating it is provided with between furnace shell and flue, the inner side of insulating is provided with heating element heater, bell is provided with motor and thermocouple, the lower end of motor is provided with blade, is provided with material framework, for the air intake installation being passed through bottom flue by nitriding gas and the guiding subassembly being used for carrying out carburizing gas drain in described flue.
Above-mentioned nitriding furnace, preferably, described air intake installation includes the air inlet coil pipe being located at bottom described flue, and described air inlet coil pipe connects an airway, the other end of described airway is connected with bell and communicates with outside nitriding gas conveying equipment, and air inlet coil pipe is provided with multiple pore.
Above-mentioned nitriding furnace, it is preferred that the plurality of pore is uniformly distributed along airway, the angle between centrage and the axis of airway of pore is 60 °, and the quantity of pore is 60 ~ 80.
Above-mentioned nitriding furnace, it is preferred that described guiding subassembly is spoiler, described spoiler is arranged on inboard wall of furnace and the inwall of cincture flue, is provided with 3 ~ 4 circle spoilers at the differing heights of inboard wall of furnace altogether.
Above-mentioned nitriding furnace, it is preferred that described material framework is the multiple structure being vertically arranged.
Above-mentioned nitriding furnace, it is preferred that be provided with cooling coil in described flue, described cooling coil, around described material framework, cooling coil has multiple cooling gas venthole.
Above-mentioned nitriding furnace, it is preferred that described cooling gas venthole is uniformly distributed along cooling coil, the angle between centrage and the axis of cooling coil of cooling gas venthole is 30 °.
Above-mentioned nitriding furnace, it is preferred that the top of described furnace shell is provided with a sealing ring in the periphery of described opening, described sealing ring has annular groove, is provided with sealing ring in described annular groove.
Above-mentioned nitriding furnace, it is preferred that be provided with a water-cooling ring between described sealing ring and furnace shell.
Above-mentioned nitriding furnace, it is preferred that described elevating mechanism is hydraulicefficiency elevation structure or worm screw elevating mechanism.
Compared with prior art, the utility model has the advantage of:
(1) by arranging air inlet coil pipe bottom flue, the axis that air inlet coil pipe has multiple pore, the centrage of pore and air inlet coil pipe is the air intake installation of an angle, adds the uniformity of nitridation process, improves workpiece nitridation quality.
(2) by arranging guiding subassembly at inboard wall of furnace differing heights, nitridation process can carry out drain to nitriding gas, further increase the uniformity of nitridation.
(3) by expecting that in flue frame peripheral arranges cooling coil, after nitridation operations terminates, nitriding furnace is quickly cooled down by this cooling coil available, decreases the appearance of vein nitride on workpiece, improves product quality.
(4) sealing ring and water-cooling ring are set at furnace shell opening part, improve the sealing property of nitriding furnace.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of this utility model nitriding furnace.
Marginal data:
1, furnace shell；2, flue；3, bell；4, elevating mechanism；5, insulating；6, heating element heater；7, motor；8, spoiler；9, thermocouple；10, blade；11, material framework；12, air inlet coil pipe；13, airway；14, pore；15, cooling coil；16, cooling gas venthole；17, sealing ring；18, sealing ring；19, water-cooling ring.
Detailed description of the invention
For the ease of understanding this utility model, below in conjunction with Figure of description and preferred embodiment, this utility model is made more comprehensively, described meticulously, but protection domain of the present utility model is not limited to embodiment in detail below.
It should be noted that, when a certain element is described as on " be fixed on, be fixed in, be connected to or be communicated in " another element, it can be directly the most fixing, affixed, connect or connect on another element, it is also possible to be by other intermediate connectors indirectly fixing, affixed, connect or connect on another element.
Unless otherwise defined, the implication that all technical term used hereinafter is generally understood that with those skilled in the art is identical.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to limit protection domain of the present utility model.
Embodiment
As it is shown in figure 1, a kind of embodiment of this utility model nitriding furnace, including furnace shell 1, flue 2 and bell 3.Wherein, furnace shell 1 is the cylinder of upper opening, and flue 2 is located in furnace shell 1, and bell 3 is located at the opening part of furnace shell 1, and bell 3 connects elevating mechanism 4, and this elevating mechanism 4 is hydraulicefficiency elevation structure or worm screw elevating mechanism.Being provided with insulating 5 between furnace shell 1 and flue 2, the inner side of this insulating 5 is provided with heating element heater 6, and bell 3 is provided with motor 7 and thermocouple 9, and the lower end of motor 7 is provided with blade 10.Material framework 11, air intake installation and guiding subassembly it is provided with in the flue 2 of this nitriding furnace.Wherein, air intake installation is for sending in flue 2 by nitriding gas from the bottom of flue 2, and guiding subassembly is for carrying out drain to nitriding gas.By arranging material framework 11, air intake installation and guiding device in flue 2, when at the same time multiple workpiece being carried out nitridation operations, the uniformity of nitridation can be improved, it is ensured that workpiece nitridation quality.
In the present embodiment, air intake installation includes the air inlet coil pipe 12 being located at bottom flue 2, connecting an airway 13 on this air inlet coil pipe 12, the other end of this airway 13 is connected with bell 3 and communicates with outside nitriding gas conveying equipment, and air inlet coil pipe 12 is provided with multiple pore 14.By arranging air inlet coil pipe 12 in the bottom of flue 2, nitriding gas flows up after pore 14 ejection from this air inlet coil pipe 12, and each workpiece is carried out nitriding.Wherein, multiple pores 14 are uniformly distributed along airway 13, and the angle between centrage and the axis of airway 13 of pore 14 is 60 °, and the quantity of pore 14 is 60 ~ 80.The axis with airway 13 arranged by the centrage of pore 14 is in a certain angle, can improve the uniformity of workpiece nitridation.
In the present embodiment, guiding subassembly is spoiler 8, and this spoiler 8 is arranged on flue 2 inwall and the inwall of cincture flue 2, is provided with 3 ~ 4 circle spoilers 8 at the differing heights of flue 2 inwall altogether.The inwall of flue 2 arranges multi-turn spoiler 8, nitriding gas can be carried out drain, improve the uniformity of workpiece nitridation further.
In the present embodiment, material framework 11 is the multiple structure being vertically arranged, and the middle part of material framework 11 is provided with through hole.When carrying out nitridation operations, being respectively placed in by multiple workpiece on the different layers of material framework 11, major part nitriding gas flows up through the through hole that material framework 11 is middle under the effect of guiding subassembly, it can be ensured that the workpiece at differing heights all has good nitriding result.
In the present embodiment, being provided with cooling coil 15 in flue 2, this cooling coil 15 is arranged around material framework 11, and cooling coil 15 has multiple cooling gas venthole 16.This cooling gas venthole 16 is uniformly distributed along cooling coil 15, and the angle between centrage and the axis of cooling coil 15 of cooling gas venthole 16 is 30 °.Cooling coil 15 is set up in flue 2, after workpiece nitrogen treatment terminates, cooling gas it is passed through in cooling coil 15, cooling gas is sprayed by cooling down gas venthole 16, heat in flue 2 is taken away, realize the quick cooling to nitriding furnace, reduce the generation of veiny distribution nitride on workpiece, improve product quality.By on cooling coil 15 cool down gas venthole 16 centrage arrange with the axis of cooling coil 15 be an angle, can further improve cooling effect.
In the present embodiment, the top of furnace shell 1 is provided with a sealing ring 17 in the periphery of opening, this sealing ring 17 has annular groove, is provided with sealing ring 18 in this annular groove.Use such seal to arrange can be effectively improved the sealing effectiveness of this nitriding furnace, when preventing nitridation operations, nitriding gas leaks outside from furnace shell 1 opening part.A water-cooling ring 19 it is additionally provided with between this sealing ring 17 and furnace shell 1.In nitriding operating process, in water-cooling ring 19, it is passed through recirculated water, it is to avoid sealing ring 17 is affected generation thermal deformation by in-furnace temperature, improves the reliability sealed.
Claims (10)
1. a nitriding furnace, including furnace shell (1), flue (2) and bell (3), described furnace shell (1) is the cylinder of upper opening, flue (2) is located in furnace shell (1), bell (3) is located at the opening part of furnace shell (1), the upper connection of bell (3) has elevating mechanism (4), insulating (5) it is provided with between furnace shell (1) and flue (2), the inner side of insulating (5) is provided with heating element heater (6), bell (3) is provided with motor (7) and thermocouple (9), the lower end of motor (7) is provided with blade (10), it is characterized in that: in described flue (2), be provided with material framework (11), for the air intake installation that nitriding gas is passed through from flue (2) bottom and for nitriding gas being carried out the guiding subassembly of drain.
Nitriding furnace the most according to claim 1, it is characterized in that: described air intake installation includes being located at the air inlet coil pipe (12) of described flue (2) bottom, described air inlet coil pipe (12) is upper connects an airway (13), the other end of described airway (13) is connected with bell (3) and communicates with outside nitriding gas conveying equipment, and air inlet coil pipe (12) is provided with multiple pore (14).
Nitriding furnace the most according to claim 2, it is characterized in that: the plurality of pore (14) is uniformly distributed along airway (13), angle between centrage and the axis of airway (13) of pore (14) is 60 °, and the quantity of pore (14) is 60 ~ 80.
Nitriding furnace the most according to claim 1, it is characterized in that: described guiding subassembly is spoiler (8), described spoiler (8) is arranged on flue (2) inwall and the inwall of cincture flue (2), is provided with 3 ~ 4 circles spoiler (8) at the differing heights of flue (2) inwall altogether.
Nitriding furnace the most according to claim 1, it is characterised in that: described material framework (11) is the multiple structure being vertically arranged.
Nitriding furnace the most according to claim 1, it is characterised in that: being provided with cooling coil (15) in described flue (2), described cooling coil (15), around described material framework (11), cooling coil (15) has multiple cooling gas venthole (16).
Nitriding furnace the most according to claim 6, it is characterised in that: described cooling gas venthole (16) is uniformly distributed along cooling coil (15), and the angle between centrage and the axis of cooling coil (15) of cooling gas venthole (16) is 30 °.
Nitriding furnace the most according to claim 1, it is characterised in that: the top of described furnace shell (1) is provided with a sealing ring (17) in the periphery of described opening, and described sealing ring (17) has annular groove, is provided with sealing ring (18) in described annular groove.
Nitriding furnace the most according to claim 8, it is characterised in that: it is provided with a water-cooling ring (19) between described sealing ring (17) and furnace shell (1).
Nitriding furnace the most according to claim 1, it is characterised in that: described elevating mechanism (4) is hydraulicefficiency elevation structure or worm screw elevating mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620260294.6U CN205443427U (en) | 2016-03-31 | 2016-03-31 | Nitriding furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620260294.6U CN205443427U (en) | 2016-03-31 | 2016-03-31 | Nitriding furnace |
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| CN205443427U true CN205443427U (en) | 2016-08-10 |
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| CN201620260294.6U Active CN205443427U (en) | 2016-03-31 | 2016-03-31 | Nitriding furnace |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835007A (en) * | 2017-03-09 | 2017-06-13 | 山东汇锋传动股份有限公司 | The surfaces nitrided stove of cross wedge rolling die |
| CN106868447A (en) * | 2017-04-11 | 2017-06-20 | 江苏汇九齿轮有限公司 | Gear Processing well formula gas nitriding furnace |
| CN107641783A (en) * | 2017-08-31 | 2018-01-30 | 安徽信息工程学院 | Magnetic material nitridation device |
| CN114318211A (en) * | 2021-11-26 | 2022-04-12 | 宁波吉威熔模铸造有限公司 | Heat treatment equipment for alloy steel investment casting |
| CN114517281A (en) * | 2020-11-19 | 2022-05-20 | 青岛泽昊汽车配件有限公司 | Vacuum nitriding furnace for pressure bar support sleeve |
| CN117904574A (en) * | 2024-03-15 | 2024-04-19 | 江苏库纳新能源股份有限公司 | Surface nitriding treatment equipment of die |
-
2016
- 2016-03-31 CN CN201620260294.6U patent/CN205443427U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835007A (en) * | 2017-03-09 | 2017-06-13 | 山东汇锋传动股份有限公司 | The surfaces nitrided stove of cross wedge rolling die |
| CN106868447A (en) * | 2017-04-11 | 2017-06-20 | 江苏汇九齿轮有限公司 | Gear Processing well formula gas nitriding furnace |
| CN107641783A (en) * | 2017-08-31 | 2018-01-30 | 安徽信息工程学院 | Magnetic material nitridation device |
| CN114517281A (en) * | 2020-11-19 | 2022-05-20 | 青岛泽昊汽车配件有限公司 | Vacuum nitriding furnace for pressure bar support sleeve |
| CN114517281B (en) * | 2020-11-19 | 2024-02-06 | 青岛泽昊汽车配件有限公司 | Vacuum nitriding furnace for pneumatic rod support sleeve |
| CN114318211A (en) * | 2021-11-26 | 2022-04-12 | 宁波吉威熔模铸造有限公司 | Heat treatment equipment for alloy steel investment casting |
| CN117904574A (en) * | 2024-03-15 | 2024-04-19 | 江苏库纳新能源股份有限公司 | Surface nitriding treatment equipment of die |
| CN117904574B (en) * | 2024-03-15 | 2024-05-14 | 江苏库纳新能源股份有限公司 | Surface nitriding treatment equipment of die |
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