CN209178463U - A kind of auxiliary cathode heating device for hot wall ion-nitriding furnace - Google Patents
A kind of auxiliary cathode heating device for hot wall ion-nitriding furnace Download PDFInfo
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- CN209178463U CN209178463U CN201821907695.1U CN201821907695U CN209178463U CN 209178463 U CN209178463 U CN 209178463U CN 201821907695 U CN201821907695 U CN 201821907695U CN 209178463 U CN209178463 U CN 209178463U
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- Prior art keywords
- heating
- auxiliary cathode
- nitriding furnace
- ion
- heating tube
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 75
- 238000005121 nitriding Methods 0.000 title claims abstract description 35
- 239000003351 stiffener Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The utility model discloses a kind of auxiliary cathode heating devices for hot wall ion-nitriding furnace, it is characterized in that, comprising: heating tube (7), the upper cover (1) of the heating tube (7) is installed, auxiliary cathode group of heating elements are fit (2), vertical stiffener plate (3) and bottom plate (4) composition, the auxiliary cathode group of heating elements fit (2) include: to be welded with the inner annular plate (8) and stiffener plate (9) composition of the heating tube (7), the bottom plate (4) is mounted on glow discharge nitriding furnace hearth plate (5), the heating tube (7) is auxiliary cathode heating element.The utility model provides a kind of auxiliary cathode heating device for hot wall ion-nitriding furnace, it can be achieved that the useful space is small in occupancy furnace and heating is adjustable, and structure is simple, stable and reliable in work, long service life.
Description
Technical field
The invention belongs to ion Field of Heat-treatment, specifically, being related to a kind of auxiliary yin for hot wall ion-nitriding furnace
Pole heating device.
Background technique
Ion-nitriding furnace is divided into two class of cold wall structure and hot-wall structure according to heating method.Early stage ion-nitriding furnace is mostly cold
Wall construction, workpiece temperature are uneven, and thermometric is not allowed the drawbacks of being the equipment.Mostly use hot-wall structure, drawbacks described above base greatly in recent years
Originally it is addressed.
Present hot wall ion-nitriding furnace hot-wall structure mostly uses setting auxiliary resistance element in or beyond vacuum retort to heat,
Outside deionization nitriding furnace DC power supply itself, a set of resistive element heating auxiliary heating power supply is separately set, equipment increases cost, behaviour
Make and control makes troubles.Prior art ion-nitriding furnace unifies DC power supply, and it is auxiliary that the progress of auxiliary cathode plate is arranged in furnace
Heating is helped, but often the useful space is big in occupancy furnace, the heating of auxiliary cathode plate can not be adjusted.
Summary of the invention
The present invention has designed and developed a kind of auxiliary cathode heating device for hot wall ion-nitriding furnace, overcomes existing auxiliary
Cathode plate auxiliary heating is helped, the useful space is big in occupancy furnace, heats the defect that can not be adjusted, and making it have, which can be achieved, occupies in furnace
The useful space is small and heats adjustable feature.
A kind of auxiliary cathode heating device for hot wall ion-nitriding furnace, characterized in that it comprises: heating tube (7),
The upper cover (1), auxiliary cathode group of heating elements fit (2), vertical stiffener plate (3) and bottom plate (4) of the heating tube (7) are installed
Composition, the auxiliary cathode group of heating elements fit (2) include: the inner annular plate (8) and reinforcing rib for being welded with the heating tube (7)
Plate (9) composition, the bottom plate (4) are mounted on glow discharge nitriding furnace hearth plate (5), and the heating tube (7) is auxiliary cathode heating unit
Part.
Preferably, the heating tube (7) is steel thin-wall cylinder short tube, and diameter of bore 10-18mm, length is
15-25mm, wall thickness 1-3mm, the heating tube (7) be several heating tubes (7) arrange, heating tube (7) center away from for
30-100mm, fit (2) spacing of the auxiliary cathode group of heating elements is 20-100mm, the auxiliary cathode heating element combinations
Body (2) inner wall temperature is 400-550 degrees Celsius.
Preferably, the bottom plate (4) is stacked and is equipped on glow discharge nitriding furnace hearth plate (5), is directly connected to ion-nitriding furnace
Same DC power supply.
The beneficial effects of the present invention are: the utility model provides a kind of auxiliary cathode heating for hot wall ion-nitriding furnace
Device is, it can be achieved that the useful space is small in occupancy furnace and heating is adjustable, and structure is simple, stable and reliable in work, long service life.
Detailed description of the invention
Fig. 1 is a kind of auxiliary cathode schematic diagram of heating device for hot wall ion-nitriding furnace of the utility model.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
As shown in Figure 1, the utility model provides a kind of auxiliary cathode heating device for hot wall ion-nitriding furnace, add
Heat pipe is steel thin-wall cylinder short tube, and heating tube is auxiliary cathode heating element, and the heating tube diameter of bore is 10-18mm,
Length is 15-25mm, wall thickness 1-3mm.Heating tube utilizes the hollow cathode effect of glow discharge as cathode, by seeping in ion
Under the operating air pressure of nitrogen furnace ammonia or nitrogen containing atmosphere, heating tube diameter of bore and length are adjusted, realizes in hole and hollow yin does not occur
Pole electric discharge forms glow discharging heating effect in stable heating pipe hole and is superimposed under 400-1000V DC voltages.Utilize this
The heating effect of kind superposition, makes heating tube temperature be increased to 500-550 degrees Celsius.By taking round bell-type ion-nitriding furnace as an example,
His form furnace structure is similar.Auxiliary cathode cover is disposed on the furnace hearth plate (5) in bell-jar cold hearth heat screen.Auxiliary cathode cover
By the upper cover (1) of installation heating tube, peripheral auxiliary cathode group of heating elements are fit (2), found stiffener plate (3) and bottom plate (4) group
At.Bottom plate (4) is directly fallen on furnace inner cathode bottom plate (5), and auxiliary cathode cover is made directly to connect ion-nitriding furnace DC power supply.Cause
This workpiece to be processed (6) being mounted on furnace hearth plate (5) and auxiliary cathode are heated using same DC power supply.
Auxiliary cathode heating element (7) is steel cylinder short tube, and heating tube is welded in the circular hole of inner annular plate (8), ring
Shape inner panel is fixed by stiffener plate (9).It is fit (2) to form auxiliary cathode group of heating elements.
By trial assembly heating tube on auxiliary cathode combination of elements, adjust packing density and each assembly spacing from.Heating
Away from 30-100mm centered on pipe density, each assembly spacing is 20-100mm.Inner wall temperature is surveyed using thermocouple, by adjusting
It realizes the adjustable heating of auxiliary cathode, makes 400-550 degrees Celsius of inner wall temperature of assembly (2), be then welded fixation.It can make
Produce the heating tube mounting means and position that height is adapted on bottom at a temperature of table in preset auxiliary cathode cover.Correct cold wall
Low high, high in other places drawback in workpiece temperature in furnace.
The auxiliary cathode heating system of installation auxiliary cathode heating element composition, forms auxiliary cathode heat in ion-nitriding furnace
Wall ion-nitriding furnace.Application example: shove charge handles 50 × 810mm of φ in workpiece, and whether there is or not the ion of auxiliary cathode cover infiltrations for measurement
Nitrogen furnace, the comparison of two furnaces.As a result prove that auxiliary cathode cover significantly improves workpiece temperature uniformity in furnace.It surveys in auxiliary cathode cover
Temperature is 450-550 degrees Celsius.Inside and outside workpiece and sample hardness gradient are consistent up and down.Under surface 0.02 with 0.10mm difference of hardness most
Greatly only 60HV0.1, difference is 0.15mm to nitriding layer depth up and down.
And the ion-nitriding furnace without auxiliary cathode cover, same pole is handled, upper and lower temperature difference is big, the hardness ladder of upper and lower sample
It is very big to spend difference.0.02 reaches 347HV0.1 with 0.10mm highest hardness difference under surface, and difference reaches 0.25mm to nitriding layer depth up and down
More than.
Conventional ion nitriding furnace can not carry out ionic oxide formation processing since there are cold walls.For auxiliary cathode hot wall ion
Nitriding furnace be successfully made φ 50 × 810mm pole ionic oxide formation processing, realize uniform alumina, it is seen that auxiliary cathode hot wall from
Sub- nitriding furnace can significantly improve workpiece temperature uniformity.Meet high-volume, full shove charge, the high-quality ion for loading in mixture furnace and machining long workpieces
Nitrizing Treatment.It can be applied equally to ionic oxide formation processing.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With.It can be applied to various suitable the field of the invention completely.It for those skilled in the art, can be easily
Realize other modification.Therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (3)
1. a kind of auxiliary cathode heating device for hot wall ion-nitriding furnace, characterized in that it comprises: heating tube (7), peace
Upper cover (1), auxiliary cathode group of heating elements fit (2), vertical stiffener plate (3) and bottom plate (4) group equipped with the heating tube (7)
At the auxiliary cathode group of heating elements fit (2) include: the inner annular plate (8) and stiffener plate for being welded with the heating tube (7)
(9) it forms, the bottom plate (4) is mounted on glow discharge nitriding furnace hearth plate (5), and the heating tube (7) is auxiliary cathode heating element.
2. a kind of auxiliary cathode heating device for hot wall ion-nitriding furnace according to claim 1, which is characterized in that
The heating tube (7) be steel thin-wall cylinder short tube, diameter of bore 10-18mm, length 15-25mm, wall thickness 1-3mm,
The heating tube (7) is that several heating tubes (7) arrange, and away from being 30-100mm, the auxiliary is negative at heating tube (7) center
Group of heating elements fit (2) spacing in pole is 20-100mm, and fit (2) inner wall temperature of the auxiliary cathode group of heating elements is 400-
550 degrees Celsius.
3. a kind of auxiliary cathode heating device for hot wall ion-nitriding furnace according to claim 1, which is characterized in that
The bottom plate (4), which is stacked, to be mounted on glow discharge nitriding furnace hearth plate (5), and the same DC power supply of ion-nitriding furnace is directly connected to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821907695.1U CN209178463U (en) | 2018-11-20 | 2018-11-20 | A kind of auxiliary cathode heating device for hot wall ion-nitriding furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821907695.1U CN209178463U (en) | 2018-11-20 | 2018-11-20 | A kind of auxiliary cathode heating device for hot wall ion-nitriding furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209178463U true CN209178463U (en) | 2019-07-30 |
Family
ID=67373400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821907695.1U Active CN209178463U (en) | 2018-11-20 | 2018-11-20 | A kind of auxiliary cathode heating device for hot wall ion-nitriding furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209178463U (en) |
-
2018
- 2018-11-20 CN CN201821907695.1U patent/CN209178463U/en active Active
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240323 Address after: No. 9138 Chaoda Road, Industrial and Economic Development Zone, Chaoyang District, Changchun City, Jilin Province, 130012 (intersection of Chaoda Road and Tieta Road in Shuangshan Village, Datun Town, Chaoyang District) Patentee after: Changchun Jinma Technology Manufacturing Co.,Ltd. Country or region after: China Address before: 130000 No. 9138, Chaoda Road, industrial economic development zone, Chaoyang District, Changchun City, Jilin Province Patentee before: Changchun Jinma Mould Technology Co.,Ltd. Country or region before: China |