CN107881457B - A kind of temperature sensor fire resistant anticorrosive wear-resistant coating, temperature sensor and application - Google Patents
A kind of temperature sensor fire resistant anticorrosive wear-resistant coating, temperature sensor and application Download PDFInfo
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- CN107881457B CN107881457B CN201711114046.6A CN201711114046A CN107881457B CN 107881457 B CN107881457 B CN 107881457B CN 201711114046 A CN201711114046 A CN 201711114046A CN 107881457 B CN107881457 B CN 107881457B
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/10—Protective devices, e.g. casings for preventing chemical attack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
- G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The present invention provides a kind of temperature sensor high-temperature resistant anti-corrosive wear-resistant coating, the coating is made by being sprayed into protecting tube for temperature sensor surface after chromic anhydride and crystal of zirconium oxide Hybrid Heating, specifically mixed by chromic anhydride with crystal of zirconium oxide, it stirs evenly, it temperature sensor thermometric end surfaces is applied to by plasma spray is made after being heated to melting or semi-molten state, wherein the volume ratio of chromic anhydride and crystal of zirconium oxide is 35 ~ 75:25 ~ 65, a kind of application the present invention also provides temperature sensor using above-mentioned coating and the temperature sensor in cement plant, the temperature sensor of high-temperature resistant anti-corrosive wearing layer is coated in the present invention compared to traditional temperature sensor, it is more suitable for high temperature, corrosion, it is ground in the severe measurement environment of this triplicity and uses, using the time up to 143 hours, prolonged than existing temperature sensor using the time 2 times are about, manufacturing cost substantially reduces while being promoted using the time, decreases the workload of more than half.
Description
Technical field
The invention belongs to sensor technical fields, more particularly to a kind of temperature sensor fire resistant anticorrosive is wear-resisting
Coating, temperature sensor and application.
Background technique
Since thermocouple performance is stable, accurate and reliable, advantages of simple structure and simple, so that the application of thermocouple temperature sensor
More and more extensive, this kind of temperature sensor includes terminal box, thermocouple, protection pipe and attachment device, and thermocouple and terminal box connect
It connects, protects pipe sleeve in the outside of thermocouple, attachment device is located at the outside of protection pipe.Temperature sensor is cement plant TT&C system
Most important primary instrument, thermometric accurately whether will result directly in whether temperature control accurate, determine the quality of various grade cements.
The loss of temperature sensor is quite big on domestic cement production enterprise production line, in the market the service life of existing temperature sensor
0.5 day~3 days, market price be Shi $600 member that service life is 0.5 day/, it is $ that service life, which is 2.5 days,
1200 yuan/, attached drawing 1 are the temperature sensors (1161 DEG C~1260 DEG C of normal temperature) after damage.Cement plant is generally in kiln tail
It is both provided with a measurement point at cigarette, 1200 yuan/2.5 days=480 yuan/day of consumption are at least needed under maximum temperature daily, by cement
Factory produces 200 days every year and calculates, and a measurement point need to spend 9.6 ten thousand yuan every year, if temperature sensor can be prolonged using the time
It is long, then extending one time of measurement point, so that it may save 1/2.5 day × 9.6 ten thousand yuan=3.84 ten thousand yuan, a general cement
Dry-process rotary kiln production line has 6 temperature measuring points, respectively three-level cylinder, level Four cylinder, Pyatyi cylinder cone temperature, in the middle part of dore furnace,
Kiln tail cigarette, kiln head cover temperature, 6 points can save 23.04 ten thousand yuan in total.It can be seen that if the service life of temperature sensor can be extended,
So for cement production enterprise, the production cost saved every year is considerable, and does not influence manufacturing schedule, together
When, technical staff is up on 60 meters of rotary kiln without often climbing up position, removes replacement temperature sensor, significantly mitigation operator
Member's labor intensity.
Field of pyrometry on the market at present, the K-type thermocouple that the overwhelming majority is all within 1300 DEG C, it is one kind
Cheap metal, cost is relatively low, adds outside protective pipe and terminal box with K-type thermocouple, becomes as a complete forming temperature sensing
Device, and determine that the service life of temperature sensor is mainly the material of outside protective pipe, in 1300 DEG C of high-temperature field, outside protective pipe
Material it is domestic at present usually all use nichrome, such as 2520 (U.S.'s trade mark is 310S), however, with this material have one it is huge
Bottleneck, the country fail to break through always, that is, be ground in the severe measurement environment of this triplicity in high temperature, burn into, nickel chromium triangle
The service life of alloy will greatly shorten, because high temperature, burn into are ground this three for material, referred to as three " are killed greatly
Hand ", attached drawing 1 are the temperature sensor measurement end after measurement damage, and high-temperature sulfur corrosion, also known as heat erosion are easily to damage
Hurt material, if to corrosion and heat resistant, then material is with the high temperature resistants phosphorus content such as corundum, quartz high nonmetallic
Can solve, however these nonmetallic materials all can only corrosion and heat resistant, be ground without being resistant to, they are all frangible；If light is wear-resistant
It cuts, metal material is so used in shock resistance.Therefore, a kind of satisfaction while resistant to high temperatures, solar heat protection sulfur corrosion, resistance to grinding three to be found
It plants inherently conflicting characteristic and rubs up material together again, it is by no means easy.So being passed if necessary to improve temperature
The service life of sensor, key are to measure the service life for the protection pipe that environment directly contacts how to improve protection pipe in height
Service life in temperature, the adverse circumstances of burn into grinding triplicity is research emphasis.Between developing one kind when in use
The upper extended temperature sensor of energy, reduces production cost for enterprise, reduces labor intensity.
Therefore, to develop a kind of cost not high there is an urgent need to city's field energy for cement production enterprise, and service life can extended new material
Thermocouple temperature sensor.
Summary of the invention
It is ground in view of the above-mentioned problems, can be improved temperature sensor the object of the present invention is to provide one kind in high temperature, burn into
The temperature sensor fire resistant anticorrosive wear-resistant coating of service life under environment.
Another object of the present invention is to provide a kind of high-temperature sensor for having high-temperature resistant anti-corrosive wear-resisting.
Application it is also an object of the present invention to provide high-temperature sensor in cement plant.
Goal of the invention of the invention is achieved through the following technical solutions:
A kind of temperature sensor high-temperature resistant anti-corrosive wear-resistant coating, by being sprayed into temperature after chromic anhydride and crystal of zirconium oxide Hybrid Heating
Degree sensor protection pipe surface is made, and is mixed, is stirred evenly with crystal of zirconium oxide by chromic anhydride, is heated to melting or semi-molten state
Temperature sensor thermometric end surfaces are applied to by plasma spray afterwards to be made, wherein the volume ratio of chromic anhydride and crystal of zirconium oxide be 35~
75:25~65.
Preferably, the volume ratio of chromic anhydride and crystal of zirconium oxide is 65:35.
Preferably, temperature sensor high-temperature resistant anti-corrosive wear-resistant coating is with a thickness of 0.07~0.15mm.It has sprayed thick and temperature passes
Sensor basal body binding force is not strong, has little significance, and cost improves 1/2, has sprayed thin and corresponding technical effect is not achieved, the present invention
Considering to realize high temperature resistant, wear-resistant, erosion-resisting while reducing cost, the further preferred temperature sensor high temperature resistant is anti-
Rotten wear-resistant coating is with a thickness of 0.1mm.
Preferably, the parameter of the plasma spraying are as follows: 150~300m/s of ion velocity, is applied by 10000 DEG C of flame temperature
Layer voidage 5~10%, 30~70MPa of bond strength.Plasma spraying is the skill of a kind of material surface strengthening and surface modification
Art can make the improved technology of basic surface, using scientific and reasonable parameter, can make matrix surface have it is wear-resisting, corrosion-resistant,
The performances such as high temperature oxidation resisting, electrical isolation, heat-insulated, radiation, anti-attrition and sealing.
Invention additionally discloses a kind of temperature sensor, including protection pipe, the protecting tube for temperature sensor surface is provided with
Above-mentioned high-temperature resistant anti-corrosive wear-resistant coating.
Preferably, the material of the protection pipe is nichrome.
It is further preferred that the chemical composition weight percent of the nichrome material are as follows:
Cr:9~10%, Co:0.7~1.2%, Si:0.3~0.6%, Ca:0.02~0.05%, Y:0.04~
0.08%, mischmetal: 0.03~0.07%, surplus is Ni.
Preferably, the inner wall thickness of the protection pipe is 6~7mm, preferably 6.5mm.
Preferably, the temperature sensor overall length 1050mm, the temperature sensor front end 500mm are spraying section, spraying
There is high-temperature resistant anti-corrosive wear-resistant coating.
Temperature sensor of the present invention is particularly suitable for producing the field of temperature measurement of cement industry process in cement plant.
Compared with prior art, beneficial effects of the present invention:
(1) the invention by chromic anhydride and crystal of zirconium oxide mixed melting, utilize the method spraying of plasma spraying
The high-temperature resistant anti-corrosive wearing layer of adhesion-tight is formed to temperature sensor surface, which has good resistance to height
Temperature, anticorrosion and wear-resisting property, while being tightly combined with the protection pipe on temperature sensor surface, wherein combination includes chemistry
In conjunction with, mechanical bond, molecule combine three kinds of modes.
(2) temperature sensor of high-temperature resistant anti-corrosive wearing layer is coated in the present invention compared to traditional temperature sensor, more
Add and is suitble to use in the severe measurement environment that high temperature, burn into are ground this triplicity, the temperature sensor having on existing market
All without plating hard chrome and spraying zirconium oxide, in 1200 DEG C or so of cement workshop, use the time up to 50 hours, valence
Lattice are 1200 yuan every, and an annual measurement point is 80 using number, and each cement plant is made altogether by the calculating of minimum six points
It is 480 with number, every annual cost is 57.6 ten thousand yuan, and the temperature sensor that high-temperature resistant anti-corrosive wearing layer is coated in the present invention makes
With the time up to 143 hours, extend about 2 times using the time than existing temperature sensor, this hair while being promoted using the time
The manufacturing cost of bright middle temperature sensor is only 600 yuan every, and an annual measurement point is 34 using number, each cement plant
By minimum six points calculate altogether using number be 204, every annual cost be 12.24 ten thousand yuan, save 45.36 ten thousand yuan, save at
This while, reduces the workload of more than half.
(3) present invention has a extensive future, and there are many national cement plant quantity, only one, Hunan province, and annual output is 5000
Ton or more cement plant just have more than 200 families, for energy-saving angle, a large amount of resource can be saved for country, therefore grind
Temperature sensor after system has good market popularization value.In addition, high-temperature resistant anti-corrosive wearing layer of the present invention can be widely applied
In the thermometric occasion that a variety of high temperature such as cement, electric power, coal, chemical industry, national defence, burn into are ground.
Detailed description of the invention
Attached drawing 1 is the temperature sensor measurement end after damaging in background of invention.
Attached drawing 2 is arrangement of temperature sensor schematic diagram of the present invention.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below.Following embodiments only for illustration, Bu Nengli
Solution is limitation of the present invention.Unless stated otherwise, raw material and equipment used in following embodiments are that this field routinely makes
Raw material and equipment.
Embodiment 1
The present embodiment provides a kind of temperature sensor high-temperature resistant anti-corrosive wear-resistant coatings.
The coating spraying on protecting tube for temperature sensor surface, first by volume ratio be 35~75:25~65 chromic anhydride with
Crystal of zirconium oxide is mixed and heated to melting or semi-molten state, is then sprayed using material of the spraying equipment after mixed melting
It applies, it is wear-resisting that protecting tube for temperature sensor surface formation temperature sensor high-temperature resistant anti-corrosive is sprayed to using the method for plasma spraying
Coating.Wherein, temperature sensor high-temperature resistant anti-corrosive wear-resistant coating coating thickness is 0.07~0.15mm.
Plasma spraying technology is using the plasma-arc by DC powered as heat source, and chromic anhydride and chromium oxide is brilliant
Body is heated to melting or semi-molten state after mixing evenly, and forms attachment to spray to the combination of temperature sensor front-end surface at a high speed
Firm superficial layer, the coating and the combination of temperature sensor include chemical bonding, mechanical bond, three kinds of sides in conjunction with molecule
Formula.
Wherein, the technical indicator of plasma spraying are as follows: 150~300m/s of ion velocity, 10000 DEG C of flame temperature, coating
Voidage 5~10%, 30~70MPa of bond strength.
Temperature sensor high-temperature resistant anti-corrosive wear-resistant coating can be applied to various temperature biography common on the market in the present embodiment
On sensor, the high temperature resistant, anti-corrosion and wear-resisting property of temperature sensor are promoted, so that extending it uses the time.
Embodiment 2
The present embodiment provides a kind of temperature sensing of temperature sensor high-temperature resistant anti-corrosive wear-resistant coating in Application Example 1
Device.
Fig. 2 is arrangement of temperature sensor schematic diagram, which includes thermocouple 3, terminal box 1, protection pipe 4, connection
Device 2 and temperature measurement fraction 5, thermocouple 3 are connect with terminal box 1, and 4 sets of the protection pipe outsides in thermocouple 3, attachment device 2 is set
In the outside of protection pipe 4.Temperature sensor is connect by attachment device 2 with measurement point, the protection pipe 4 for temperature sensor
Temperature measurement fraction 5 gos deep into measurement point and determinand contact thermography.
4 inner wall thickness of the present embodiment protecting tube for temperature sensor is 6.5mm；Material is nichrome, in the present embodiment, nickel
The chemical composition weight percent of chromium alloy material are as follows: Cr:10%, Co:1.0%, Si:0.5%, Ca:0.03%, Y:
0.06%, mischmetal: 0.05%, surplus is Ni.
The present embodiment temperature sensor overall length is 1050mm, and temperature sensor front end 500mm is spraying section.
Wherein, temperature sensor high-temperature resistant anti-corrosive wear-resistant coating is sprayed on protection pipe 4 and sprays section surface, sprays rear surface feelings
Condition is shown in Table 1, and spraying method is implemented according to the step in embodiment 1, and design parameter is as follows:
Chromic anhydride and crystal of zirconium oxide that volume ratio is 65:35 are mixed and heated to melting or semi-molten state first, then
It is sprayed using material of the spraying equipment after mixed melting, temperature sensor is sprayed to using the method for plasma spraying and is protected
Pillar thermometric end surfaces formation temperature sensor high-temperature resistant anti-corrosive wear-resistant coating.Wherein, temperature sensor high-temperature resistant anti-corrosive is wear-resisting
Coating spraying is with a thickness of 0.07~0.15mm；The present embodiment preferably uses 0.1mm thickness.The technical indicator of plasma spraying are as follows:
Ion velocity 200m/s, 10000 DEG C of flame temperature, coating voidage 7%, bond strength 60MPa.
Embodiment 3
The present embodiment provides a kind of temperature sensing of temperature sensor high-temperature resistant anti-corrosive wear-resistant coating in Application Example 1
Device.
The present embodiment is substantially the same manner as Example 2, and difference is that the volume ratio of chromic anhydride and crystal of zirconium oxide is 50:50,
Spraying rear surface situation is shown in Table 1.
Embodiment 4
The present embodiment provides a kind of temperature sensing of temperature sensor high-temperature resistant anti-corrosive wear-resistant coating in Application Example 1
Device.
The present embodiment is substantially the same manner as Example 2, and difference is that the volume ratio of chromic anhydride and crystal of zirconium oxide is 75:25,
Spraying rear surface situation is shown in Table 1.
Embodiment 5
The present embodiment provides a kind of temperature sensing of temperature sensor high-temperature resistant anti-corrosive wear-resistant coating in Application Example 1
Device.
The present embodiment is substantially the same manner as Example 2, and difference is that the volume ratio of chromic anhydride and crystal of zirconium oxide is 25:75,
Spraying rear surface situation is shown in Table 1.
Embodiment 6
The present embodiment provides a kind of temperature sensing of temperature sensor high-temperature resistant anti-corrosive wear-resistant coating in Application Example 1
Device.
The present embodiment is substantially the same manner as Example 2, and difference is that the volume ratio of chromic anhydride and crystal of zirconium oxide is 35:65,
Spraying rear surface situation is shown in Table 1.
Comparative example 1
The present embodiment provides a kind of temperature sensors for only plating hard chrome coating, and the sensor is identical as 2 structure of embodiment, plating
The advantages of hard chrome is to improve temperature sensor hardness, for wear-resisting, raising temperature sensor and temperature sensor outside protective pipe
Binding force, method are, with a thickness of 0.1mm, to plate hard chrome in 500mm sections of temperature sensor front end plating hard chrome and use this field routine skill
Art.
Comparative example 2
The present embodiment provides a kind of temperature sensor for only spraying zirconia coating, the sensor and 2 structure phase of embodiment
Together, the advantages of spraying zirconium oxide is anticorrosion, because being nonmetallic, high temperature resistant, fusing point at 2700 DEG C, but itself and temperature sensor
Basic structure defective tightness, it is not wear-resisting, specific spraying method be temperature sensor front end 500mm spray zirconium oxide, thickness
For 0.1mm, zirconium oxide is sprayed using plasma spraying method in embodiment 2.
Embodiment 7
The present embodiment is application of the temperature sensor in cement plant in embodiment 2~6 and comparative example 1,2.
Environment is as follows in cement plant: it needs test point in rotary kiln, is producing cement, be burning coal dust, lime stone,
Ceaselessly rotary grinding, will form for coal dust firing generation lead to sulfur corrosion in rotary kiln for coal dust and limestone particle, measuring point
Temperature is stablized at 1161 DEG C, and actual capabilities can reach 1200 DEG C；Air in rotary kiln is in negative pressure, and kiln inner pressure is -800Pa.
By temperature sensor in embodiment 2~6, comparative example 1, comparative example 2 and existing temperature sensor application on the market
In above-mentioned environment, time used is shown in Table 1.
1 temperature sensor surface condition of table and time used
| Embodiment | Sprayed surface situation after mixing | Time used (h) |
| Embodiment 2 | Surface time is smooth | 143 |
| Embodiment 3 | Rough surface | 100 |
| Embodiment 4 | Surface is smooth | 123 |
| Embodiment 5 | Surface is in fine particle shape | 95 |
| Embodiment 6 | Surface is in fine particle shape | 112 |
| Comparative example 1 | / | 90 |
| Comparative example 2 | / | 84 |
| Existing market temperature sensor | / | 50 |
The loss of cement plant temperature sensor is quite big, and the service life of existing temperature sensor is 0.5 day~3 days in the market,
Market price be Shi $600 member that service life is 0.5 day/, service life be within 2.5 days $1200 member/.Cement plant
Generally be both provided with a measurement point at kiln tail cigarette, at least needed daily under maximum temperature 1200 yuan/2.5 days=480 yuan of consumption/
It is produced 200 days every year by cement plant and is calculated, and a measurement point need to spend 9.6 ten thousand yuan every year, a general cement dry method rotary kiln
Production line has 6 temperature measuring points, respectively three-level cylinder, level Four cylinder, Pyatyi cylinder cone temperature, dore furnace middle part, kiln tail cigarette, kiln
Head-shield temperature, 6 need to spend 57.6 ten thousand yuan in total for point 1 year.Meanwhile technical staff is up to 60 without often climbing up position
On the rotary kiln of rice, replacement temperature sensor, significantly mitigation labor intensity of operating staff are removed.
Using the temperature sensor in embodiment 2, begin to use after installation to blowing, altogether using 143 hours, about 6 days,
It is extended 3.5 days than existing temperature sensor service life, uses temperature sensor in embodiment 2 and existing temperature sensing
Device expense is relatively shown in Table 2.
2 cement production enterprise of table uses sensor complexity comparison sheet in existing sensor and embodiment 2
From table 2 it can be seen that six measurement points can at least save every year using temperature sensor in embodiment 2 for cement plant
About 45.36 ten thousand yuan, while being the workload that cement plant mitigates more than half.
Claims (10)
1. a kind of temperature sensor high-temperature resistant anti-corrosive wear-resistant coating, which is characterized in that by chromic anhydride and crystal of zirconium oxide Hybrid Heating
After be sprayed into protecting tube for temperature sensor surface and be made, mixed, stirred evenly with crystal of zirconium oxide by chromic anhydride, be heated to melting or
It is applied to temperature sensor thermometric end surfaces by plasma spray after semi-molten state to be made, wherein the body of chromic anhydride and crystal of zirconium oxide
Product is than being 35~75:25~65.
2. high-temperature resistant anti-corrosive wear-resistant coating described according to claim 1, which is characterized in that the chromic anhydride and crystal of zirconium oxide
Volume ratio is 65:35.
3. high-temperature resistant anti-corrosive wear-resistant coating described according to claim 1, which is characterized in that the temperature sensor high temperature resistant is anti-
Rotten wear-resistant coating is with a thickness of 0.07~0.15mm.
4. the high-temperature resistant anti-corrosive wear-resistant coating according to claim 3, which is characterized in that temperature sensor high-temperature resistant anti-corrosive is resistance to
Mill coating layer thickness is 0.1mm.
5. high-temperature resistant anti-corrosive wear-resistant coating described according to claim 1, which is characterized in that the parameter of the plasma spraying
Are as follows: 150~300m/s of ion velocity, 10000 DEG C of flame temperature, coating voidage 5~10%, 30~70MPa of bond strength.
6. a kind of temperature sensor, which is characterized in that including protection pipe, the protecting tube for temperature sensor surface setting is had the right
It is required that any one of 1~5 high-temperature resistant anti-corrosive wear-resistant coating.
7. temperature sensor according to claim 6, which is characterized in that the material of the protection pipe is nichrome；
The chemical composition weight percent of the nichrome material are as follows:
Cr:9-10%, Co:0.7-1.2%, Si:0.3-0.6%, Ca:0.02-0.05%, Y:0.04-0.08% are mixed dilute
Soil: 0.03-0.07%, surplus are Ni.
8. temperature sensor according to claim 6, which is characterized in that the inner wall thickness of the protection pipe be 6~
7mm。
9. temperature sensor according to claim 6, which is characterized in that the temperature sensor overall length 1050mm, it is described
Temperature sensor front end 500mm is spraying section, is coated with high-temperature resistant anti-corrosive wear-resistant coating.
10. the described in any item temperature sensors of claim 7~9 are in the application in cement plant.
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| CN110172661B (en) * | 2019-05-15 | 2021-06-08 | 昆明理工大学 | Thermal spraying high-temperature sensor temperature measurement coating and preparation method thereof |
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