CN208038554U - A kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding - Google Patents
A kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding Download PDFInfo
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- CN208038554U CN208038554U CN201820263899.XU CN201820263899U CN208038554U CN 208038554 U CN208038554 U CN 208038554U CN 201820263899 U CN201820263899 U CN 201820263899U CN 208038554 U CN208038554 U CN 208038554U
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- tungsten
- cobalt alloy
- nozzle
- nozzle body
- laser cladding
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Abstract
The utility model designs a kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding, including nozzle body, the width direction of nozzle body is defined as a left side, it is right, the short transverse of nozzle body is defined as, under, before the length direction of nozzle body is defined as, afterwards, it is characterized in that, the parallel partition board of the M blocks from top to bottom arranged is equipped on nozzle body, M >=1, a left side for every piece of partition board, right both ends are connected with nozzle body, every piece of partition board it is upper, lower surface is all covered with tungsten-cobalt alloy wearing layer one, the inner wall surface of nozzle body is covered with tungsten-cobalt alloy wearing layer two.Tungsten-cobalt alloy wearing layer can improve the intensity and hardness of nozzle, and inoxidizability and toughness are realized while improving wearability.The laser cladding layers have high-temperature stability simultaneously, ensure that nozzle because scaling loss, deformation etc. occur for boiler high temperature, does not improve service life.
Description
Technical field
The utility model is related to a kind of wear resistant spray nozzles using tungsten-cobalt alloy laser cladding, and it is resistance to belong to boiler coal-ash combustor
Grind nozzle technology field.
Background technology
Currently, being continuously increased with China's power demands, building and running fired power generating unit substantial amounts, boiler combustion
For burner as one of boiler core component, safe and reliable operation is the premise of boiler stability and high efficiency, and power plant is to solve every year
The wear problem of burner nozzle expends a large amount of manpower and material resources.
Since China has a vast territory, coal mine is widely distributed, and coal characteristic is widely different.There are a large amount of coal-burning boiler uses to have
The coal of strong abrasiveness.For such boiler, the nozzle of burner is worn frequent occurrence, so that deformation, damage, due to burner
It is the core component of boiler combustion, this will cause boiler combustion unstable, and efficiency of combustion reduces, and low-load combustion-stabilizing ability reduces,
The series of negative such as flammability difference influence, and eventually affect safe efficient, the stable operation of unit.
Invention content
The purpose of this utility model is to provide a kind of high-quality reliable burner nozzle with high-wearing feature, ensures simultaneously
Wear resistant spray nozzle has corrosion-and high-temp-resistant, improves nozzle service life.
In order to achieve the above object, the technical solution of the utility model using tungsten-cobalt alloy laser cladding there is provided a kind of
Wear resistant spray nozzle, including nozzle body, the width direction of nozzle body is defined as it is left and right, by the short transverse of nozzle body
Be defined as upper and lower, the length direction of nozzle body be defined as forward and backward, which is characterized in that be equipped in nozzle body by up to
The parallel partition board of the M blocks of lower arrangement, the left and right both ends of M >=1, every piece of partition board are connected with nozzle body, every piece of partition board it is upper and lower
Surface is all covered with tungsten-cobalt alloy wearing layer one, and the inner wall surface of nozzle body is covered with tungsten-cobalt alloy wearing layer two.
Preferably, before the spout direction close to nozzle body on the length direction of nozzle body being defined as, opposite direction
After being defined as, then only the tungsten-cobalt alloy wearing layer one is covered on the upper and lower surface of the back segment of every piece of partition board.
Preferably, the thickness of the tungsten-cobalt alloy wearing layer one of the partition board is T2, T2 >=4mm；The tungsten-cobalt alloy is wear-resisting
The thickness of layer two is T3, T3 >=3mm.
Preferably, the tungsten-cobalt alloy wearing layer one and the tungsten-cobalt alloy wearing layer two-way cross laser cladding process difference
It is covered in the upper and lower surface of the partition board and the inner wall surface of the nozzle body.
The utility model has the advantages that：
One, to the coal nozzle of boiler-burner and overfire air jet, tungsten-cobalt alloy laser cladding skill may be used
Art, nozzle body can be that monoblock cast structure or plate spell structure.
Two, it is C: 4.5%, Cr: 19%, W: 3- that laser cladding layers, which use tungsten-cobalt alloy material, main chemical compositions proportioning,
5%, Co: 1-3%, chromium and wolfram element can improve the intensity and hardness of steel, while chromium can improve wearability
Realize inoxidizability, cobalt element significantly improves the heat resistance and high temperature hardness of alloy, and improves toughness；Wolfram element can improve back
Fiery stability significantly improves the density of steel, and material is also made to have certain red hardness.Element proportioning can ensure to use laser
Thermal stability after deposition techniques, laser cladding layers hardness are HRC50 or more, be 2 times of heat-resistant antifriction nozzle body hardness with
On, service life is 3 times or so of resistant and wear-resistant cast steel.
Three, the tungsten-cobalt alloy wearing layer can be 1200 DEG C or so with high temperature resistant, ensure nozzle not because boiler high temperature occur scaling loss,
Deformation etc. improves service life.
Four, the connection of tungsten-cobalt alloy wearing layer and substrate uses laser cladding process, and laser nozzle, which generates localized hyperthermia, to be made
After antifriction alloy fusing, is closely fused together with base material, can make tungsten-cobalt alloy wearing layer and base using laser cladding process
Plate bond strength higher, heat distortion amount smaller, alloy dilution rate is lower, while ensureing the less stomata of wearing layer, wearing layer table
Face is more smooth, while more efficient.
Description of the drawings
Fig. 1 is the schematic diagram in one direction of coal nozzle in the utility model embodiment；
Fig. 2 is the coal nozzle other direction in the utility model embodiment；
Fig. 3 A and Fig. 3 B are the nozzle blade schematic diagram after laser cladding in the utility model embodiment；
Fig. 4 A and Fig. 4 B are the nozzle inner walls schematic diagram after laser cladding in the utility model embodiment.
Specific implementation mode
To make the utility model be clearer and more comprehensible, hereby with preferred embodiment, and attached drawing is coordinated to be described in detail below.
As shown in Figures 1 and 2, a kind of wear-resisting coal nozzle using tungsten-cobalt alloy laser cladding provided by the utility model
By nozzle body 1, the tungsten-cobalt alloy wearing layer 24 of nozzle blade 2, the tungsten-cobalt alloy wearing layer 1 of nozzle blade, nozzle inner walls
Composition.Nozzle body 1 is mounted on by axis pin in burner box shell 5, and nozzle blade 2 is welded on coal nozzle ontology 1, tungsten-cobalt
Alloy wear-resisting layer 1 carries out laser cladding on the upper and lower surface of nozzle blade 2, and tungsten-cobalt alloy wearing layer 24 is in nozzle body 1
Inner wall surface carry out laser cladding.
The tungsten-cobalt alloy wearing layer 1 and tungsten-cobalt alloy wearing layer 24 of the utility model can use in coal nozzle and
On overfire air jet, nozzle abrasive resistance is effectively improved, while improving nozzle corrosion-resistant and high-temperature resistant ability, nozzle is improved and uses the longevity
Life.The tungsten-cobalt alloy elemental composition of uniqueness proportioning, can make laser cladding layers have higher antiwear characteristic, while having resistance to height
The characteristic of warm, corrosion-resistant, high temperature oxidation resisting, high rigidity extends nozzle service life.
Between tungsten-cobalt alloy wearing layer 1 and nozzle blade 2 and tungsten-cobalt alloy wearing layer 24 and nozzle body 1 it is interior
After connection uses laser cladding process, laser cladding process generation localized hyperthermia that antifriction alloy is made to melt between wall surface, with base
Material closely fuses together.It can make tungsten-cobalt alloy wearing layer and substrate bond strength higher, thermal change using laser cladding process
Shape amount smaller, alloy dilution rate is lower, while ensureing the less stomata of wearing layer, and wear-resisting layer surface is more smooth, while efficiency
Higher.
The key data and structure size of the wear-resisting coal nozzle with tungsten-cobalt alloy laser cladding of the utility model are as follows：
Tungsten-cobalt alloy elemental composition：
| Alloying element | Mass fraction % |
| Carbon C | C1 |
| Chromium Cr | C2 |
| Tungsten W | C3 |
| Cobalt Co | C4 |
Chamber size is X × Y in burner nozzle, and nozzle blade number is M, M >=1, thickness T1, the laser cladding of partition board
Layer thickness is T2, T2 >=4mm, width L1, and the laser cladding layer thickness of nozzle inner walls is T3, T3 >=3mm, width L2.
Nozzle blade 2 is installed on inside nozzle body 1, and the windward side upper and lower surface of nozzle blade 2 carries out laser cladding,
Enough width prevent the abrasion of 2 windward side of nozzle blade, wear-resisting layer thickness from can ensure the service life of coal nozzle, partition board
It can prevent tungsten-cobalt alloy wearing layer from falling off with Alloy by Laser deposition bond strength.
Coal nozzle, which meets to swing, to be required, and when burner swing, pulverized coal particle washes away angle with antifriction alloy generation, and
Tungsten-cobalt alloy laser cladding can ensure to wash away on a large scale not influence service life under angle.
Coal nozzle inner wall surrounding carries out laser cladding, ash particle can be effectively prevent to wash away nozzle inner walls, to
Ensure the structural integrity and integral strength of coal nozzle.
In conjunction with Fig. 3 A, Fig. 3 B, Fig. 4 A and Fig. 4 B, the specific size in the present embodiment is as follows：
C1=5；C2=19；C3=3；C4=5；X=500mm；Y=400mm；M=2；T1=10mm；T2=6mm；
L=200mm；T3=5mm, L=300mm.
Claims (4)
1. a kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding, including nozzle body (1), by the width of nozzle body (1)
Direction is defined as left and right, and the short transverse of nozzle body (1) is defined as above and below, and the length direction of nozzle body (1) is fixed
Justice is forward and backward, which is characterized in that it is equipped with the parallel partition board (2) of the M blocks from top to bottom arranged in the nozzle body (1), M >=1,
The left and right both ends of every piece of partition board (2) are connected with nozzle body (1), and the upper and lower surface of every piece of partition board (2) is all covered with tungsten-cobalt conjunction
The inner wall surface of golden wearing layer one (3), nozzle body (1) is covered with tungsten-cobalt alloy wearing layer two (4).
2. a kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding as described in claim 1, which is characterized in that by nozzle sheet
On the length direction of body (1) before the spout direction of nozzle body (1) is defined as, after opposite direction is defined as, then only every
The upper and lower surface of the back segment of partition board described in block (2) is covered with the tungsten-cobalt alloy wearing layer one (3).
3. a kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding as described in claim 1, which is characterized in that the partition board
Tungsten-cobalt alloy wearing layer one (3) thickness be T2, T2 >=4mm；The thickness of the tungsten-cobalt alloy wearing layer two (4) is T3, T3
≥3mm。
4. a kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding as described in claim 1, which is characterized in that the tungsten-cobalt
Alloy wear-resisting layer one (3) and the tungsten-cobalt alloy wearing layer two (4) are respectively overlay in the partition board (2) by laser cladding process
Upper and lower surface and the nozzle body (1) inner wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820263899.XU CN208038554U (en) | 2018-02-23 | 2018-02-23 | A kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820263899.XU CN208038554U (en) | 2018-02-23 | 2018-02-23 | A kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208038554U true CN208038554U (en) | 2018-11-02 |
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ID=63949718
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820263899.XU Expired - Fee Related CN208038554U (en) | 2018-02-23 | 2018-02-23 | A kind of wear resistant spray nozzle using tungsten-cobalt alloy laser cladding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208038554U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412963A (en) * | 2020-10-15 | 2021-02-26 | 太原牛磨王智能科技有限公司 | Spherical hinged connecting device for heading machine and bridge type belt reversed loader |
-
2018
- 2018-02-23 CN CN201820263899.XU patent/CN208038554U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412963A (en) * | 2020-10-15 | 2021-02-26 | 太原牛磨王智能科技有限公司 | Spherical hinged connecting device for heading machine and bridge type belt reversed loader |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181102 Termination date: 20200223 |
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| CF01 | Termination of patent right due to non-payment of annual fee |