CN108486522A - A kind of catalytic cracking unit valve wear-and corrosion-resistant coating and preparation method thereof - Google Patents
A kind of catalytic cracking unit valve wear-and corrosion-resistant coating and preparation method thereof Download PDFInfo
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- CN108486522A CN108486522A CN201810671283.0A CN201810671283A CN108486522A CN 108486522 A CN108486522 A CN 108486522A CN 201810671283 A CN201810671283 A CN 201810671283A CN 108486522 A CN108486522 A CN 108486522A
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- Prior art keywords
- corrosion
- wear
- coating
- catalytic cracking
- resistant coating
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Classifications
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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
- C23C4/129—Flame spraying
-
- 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
- C23C4/06—Metallic material
- C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a kind of catalytic cracking unit valve wear-and corrosion-resistant coatings and preparation method thereof, belong to petrochemical industry valve field.The wear-and corrosion-resistant coating is double-layer structure, and bond coating is Ni based alloy coatings, and working surface layers are Co base wear-and corrosion-resistant coatings, and coating is prepared using supersonic flame spraying technology, and technological parameter is：1750 2100SCFH of oxygen flow, 5 8GPH of kerosene, 50 70g/min of powder sending quantity, 20 26SCFH of powder feeding throughput, 350 400mm of spray distance.The valve wear-and corrosion-resistant coating that the present invention obtains, the mill of valve body is prevented to leak phenomenon, efficiently avoid valve plate and sealing surface is seriously worn problem, substantially increases the service life of valve, it solves the bottleneck problem that catalytic cracking unit stablizes safety in production, there is important industrial application value.
Description
Technical field
The present invention relates to petrochemical industry valve technology fields, and in particular to a kind of catalytic cracking unit valve wear-and corrosion-resistant coating
And preparation method thereof.
Background technology
The transport system in petrochemical field catalytic cracking workshop belongs to a kind of mode of Geldart-D particle, is material and pressure
Conveying, the impact and abrasion formed to the valve on catalytic cracking unit are all very serious.Valve is the key that air-transport system
Position, it is ideal in valve should have the characteristics that wearability is strong, stability is good, service life is long.The dress of country's catalytic cracking at present
The wearability, stability for setting valve on (such as fluid catalytic cracker) are undesirable, domestic 2 months left sides of valve average life span
The service life on the right side, imported valve only has 6 months or so, and valve is needed to frequently replace in production process, considerably increases each enterprise's fortune
Cost is sought, benefit is influenced, replacing the high-temperature flue gas leaked when valve causes operating risk larger, easily causes scald and powder to personnel
Dirt sucks, once valve leak can not seriously be replaced, can seriously affect the even running of device.
Valve surface is a kind of effective way for avoiding valve plate and sealing surface from being seriously worn using wear-and corrosion-resistant coating,
Therefore, the coating being adapted therewith for catalytic cracking unit valve, design is catalyzed for improving valve service life, being promoted
Cracking unit stablizes production safety ability, has important industrial application value.
Invention content
The purpose of the present invention is to provide a kind of catalytic cracking unit valve wear-and corrosion-resistant coating and preparation method thereof,
It is prepared for the wear-and corrosion-resistant coating of function admirable on valve, valve plate, sealing surface can be avoided to be seriously worn problem, improved
Valve service life solves the bottleneck problem that catalytic cracking unit stablizes safety in production.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of catalytic cracking unit valve wear-and corrosion-resistant coating, the wear-and corrosion-resistant coating are by being in turn attached to valve table
The bond coating and working surface layers in face form, wherein：The material of the valve is Cr5Mo or 20 steel, and the bond coating is Ni
Based alloy coating, the working surface layers are Co based alloy coatings.The bond coating thickness is 0.05-0.15mm, working surface layers
Thickness is 0.10-0.20mm.
The chemical composition of the Ni based alloys coating weight percentage is：Cr is 21-23%, Al 9-11%, Y
For 0.8-1.2%, surplus Ni.
The group of the Co based alloys coating becomes：WC is 1-5wt%, Cr2C3For 70-75wt%, CaF2For 0.2-1wt%,
Surplus is CoNiCrAlY.The chemical composition of the CoNiCrAlY is：Ni is 31-34wt.%, Cr 24.5-26.5wt.%,
Al is 5-6.5wt.%, Y 0.4-0.8wt.%, surplus Co.
The average hardness of the wear-and corrosion-resistant coating is not less than 58HRC, and average bonding strength is not less than 40MPa；This is wear-resisting resistance to
The porosity of its working surface layers of erosion resisting coating is not higher than 1%.
The preparation method of the catalytic cracking unit valve wear-and corrosion-resistant coating, passes through supersonic flame spraying work first
Skill prepares Ni based alloy coatings in valve surface, then uses supersonic flame spraying technique in Ni based alloy coating surface systems again
Standby Co based alloy coatings；The supersonic flame spraying technical matters parameter is：Oxygen flow 1750-2100SCFH, kerosene 5-
8GPH, powder sending quantity 50-70g/min, powder feeding throughput 20-26SCFH, spray distance 350-400mm.
Ni base alloy powders are used when prepared by the Ni based alloys coating, ingredient is identical as Ni based alloy coating compositions,
Ni base alloy powder granularities are 10-30 μm；The powder size that the Co based alloys coating uses when preparing is 15-45 μm.It is described
When prepared by Co based alloy coatings the powder constituent that uses for：Wear-resisting phase WC and Cr2C3, lubrication phase CaF2, Binder Phase CoNiCrAlY；
The content of each component is identical as each phase content in Co based alloy coatings.
Design Mechanism of the present invention is as follows：
Common wear-and corrosion-resistant coating is WC-Co, Cr2C3- NiCr is needed for the operating mode of catalytic cracking unit valve harshness
It proposes that one kind having better wearability, corrosion resistance, while there is the new coating system of certain lubricity, to ensure valve
Long-term stable work.CoNiCrAlY alloys have resistance to high temperature corrosion performance more more excellent than NiCr, have than Co more excellent
Different high temperature oxidation resistance can significantly improve anticorrosive, the antioxygen of coating using its Binder Phase as wear-and corrosion-resistant coating
Change performance, in wear-resistant corrosion-resistant composite coating, content is advisable in 20-30wt%, the excessively high wearability that can reduce coating, too low
The intensity of coating can be reduced；CaF2With fluorite structure, it can be used as lubrication and mutually use, reduce the friction of valve and storeroom；WC
With Cr2C3Synergy, can increase substantially the abrasion resistance properties of coating, wear-resisting phase content generally in 70-80wt% ranges,
The excessively high intensity that can influence coating, the too low wearability that can influence coating.
Coating prepared by supersonic flame spraying technology has bond strength is high, porosity is low, oxygen content is low, hardness is high etc.
Feature is the proper method for preparing catalytic cracking unit valve wear-and corrosion-resistant coating, and by technique adjustment, can prepare has
The valve of the Good All-around Properties such as high-wearing feature, high intensity wear-and corrosion-resistant coating.
The beneficial effects of the invention are as follows：
1, the present invention is handled Effect of Catalysis In Petrochemistry cracking valve by supersonic flame spraying technology, and it is wear-resisting to obtain valve
Anti-corrosion coating, it is therefore prevented that the case where valve mill leakage, being seriously worn for valve plate and sealing surface is efficiently avoided, for improving valve
Service life promotes catalytic cracking unit stabilization production safety ability, has important industrial application value.
2, wear-and corrosion-resistant coating proposed by the present invention can promote use petrochemical field other need improve wearability, corrosion resistance
Component, such as catalytic cracking unit unloads stockline deep camber elbow, the stuffing-box of PTA engineerings, sealing axle sleeve, to improving parts
Service life improves package unit operation stability, cuts operating costs, and is of great significance.
Description of the drawings
Fig. 1 is the wear-and corrosion-resistant coating duty face layer metallograph prepared in embodiment 1.
Fig. 2 is the wear-and corrosion-resistant coating duty face layer metallograph prepared in embodiment 2.
Specific implementation mode
The present invention is described in detail below in conjunction with drawings and examples.
Catalytic cracking unit valve of the present invention is specific as follows with wear-and corrosion-resistant coating production：
Step 1：Ni based alloy bond coatings are prepared on valve (20 steel) surface first by supersonic flame spraying technique,
Then Co base wear-and corrosion-resistant working surface layers are prepared on Ni based alloy bond coatings surface, working surface layers preparation process is as shown in table 1.
Step 2：Wear-and corrosion-resistant coating after being sprayed to step 1 using surface hardness meter carries out Determination of Hardness.
Step 3：Wear-and corrosion-resistant coating after being sprayed to step 1 using cupping machine is combined strength test.
Step 4：Wear-and corrosion-resistant coating duty face layer after being sprayed to step 1 using Metallographic Analysis system carries out porosity survey
It is fixed.
The chemical composition of CoNiCrAlY is (wt.%) in Co-based alloy powder in following embodiment：Ni is 31.76%, Cr
For 25.14%, Al 5.76%, Y 0.67%, surplus Co.
1 wear-and corrosion-resistant coating duty face of table layer preparation process
Embodiment 1：
In the present embodiment, catalytic cracking unit valve is specific as follows with the preparation method of wear-and corrosion-resistant coating：
Step 1：Wear-and corrosion-resistant coating is prepared using supersonic flame spraying technology, bond coating uses Ni base alloy powders
It prepares, Ni base alloy powder ingredients are (wt.%)：Cr is 22.02%, Al 10.1%, Y 0.98%, surplus Ni, granularity
It is 10-30 μm.Use supersonic flame spraying technology prepare the technological parameter of Ni based alloy coatings for：Oxygen flow
1950SCFH, kerosene 5.8GPH, powder sending quantity 53.2g/min, powder feeding throughput 22SCFH, spray distance 380mm.
Working surface layers are prepared using Co-based alloy powder, and Co-based alloy powder granularity is 30-45 μm, and powder constituent is：
1.5WC-72.6Cr2C3-0.5CaF2- CoNiCrAlY (wt.%).Using supersonic flame spraying technology preparation work face layer
Technique is as shown in table 2.
2 wear-and corrosion-resistant coating duty face of table layer preparation process
Step 2：Its bond coating thickness of step 1 gained wear-and corrosion-resistant coating is 0.07mm, and working surface layers thickness is
0.15mm。
Step 3：Wear-and corrosion-resistant coating after being sprayed to step 1 using surface hardness meter carries out Determination of Hardness, and coating is average
Hardness is 61HRC.
Step 4：Wear-and corrosion-resistant coating after being sprayed to step 1 using cupping machine is combined strength test, coating
Average bonding strength is 51.6MPa.
Step 5：Wear-and corrosion-resistant coating duty face layer after being sprayed to step 1 using Metallographic Analysis system carries out porosity survey
Fixed, coating porosity is 0.8% (Fig. 1).
Embodiment 2：
In the present embodiment, catalytic cracking unit valve is specific as follows with the preparation method of wear-and corrosion-resistant coating：
Step 1：Wear-and corrosion-resistant coating is prepared using supersonic flame spraying technology, bond coating uses Ni base alloy powders
It prepares, Ni base alloy powder ingredients are (wt.%)：Cr is 22.02%, Al 10.1%, Y 0.98%, surplus Ni, granularity
It is 10-30 μm.Use supersonic flame spraying technology prepare the technological parameter of Ni based alloy coatings for：Oxygen flow
1950SCFH, kerosene 5.8GPH, powder sending quantity 53.2g/min, powder feeding throughput 22SCFH, spray distance 380mm.
Working surface layers are prepared using Co-based alloy powder, and Co-based alloy powder granularity is 15-25 μm, and powder constituent is：
1.5WC-72.6Cr2C3-0.5CaF2- CoNiCrAlY (wt.%).Using supersonic flame spraying technology preparation work face layer
Technique is as shown in table 3.
3 wear-and corrosion-resistant coating duty face of table layer preparation process
Step 2：Its bond coating thickness of step 1 gained wear-and corrosion-resistant coating is 0.06mm, and working surface layers thickness is
0.13mm。
Step 3：Wear-and corrosion-resistant coating after being sprayed to step 1 using surface hardness meter carries out Determination of Hardness, and coating is average
Hardness is 63HRC.
Step 4：Wear-and corrosion-resistant coating after being sprayed to step 1 using cupping machine is combined strength test, coating
Average bonding strength is 56.9MPa.
Step 5：Wear-and corrosion-resistant coating duty face layer after being sprayed to step 1 using Metallographic Analysis system carries out porosity survey
Fixed, coating porosity is 0.6% (Fig. 2).
Examples detailed above only refers to, have with this patent it is similar or extend from this patent thinking based on sacrifice
The manufacturing method of the microfluid electronic device of agent, in the protection domain of this patent.
Claims (9)
1. a kind of catalytic cracking unit valve wear-and corrosion-resistant coating, it is characterised in that：The wear-and corrosion-resistant coating is by attached successively
Bond coating and the working surface layers composition in valve surface, wherein：The material of the valve is Cr5Mo or 20 steel, described viscous
Knot bottom is Ni based alloy coatings, and the working surface layers are Co based alloy coatings.
2. catalytic cracking unit valve wear-and corrosion-resistant coating described in accordance with the claim 1, it is characterised in that：The cohesive bottom
Layer thickness is 0.05-0.15mm, and working surface layers thickness is 0.10-0.20mm.
3. catalytic cracking unit valve wear-and corrosion-resistant coating described in accordance with the claim 1, it is characterised in that：Percentage by weight
The raw material powder chemical composition of content meter, the Ni based alloys coating is：Cr is 21-23%, Al 9-11%, Y 0.8-
1.2%, surplus Ni.
4. catalytic cracking unit valve wear-and corrosion-resistant coating according to claim 2, it is characterised in that：The Co bases close
The group of gold plating becomes：WC is 1-5wt%, Cr2C3For 70-75wt%, CaF2For 0.2-1wt%, surplus CoNiCrAlY.
5. catalytic cracking unit valve wear-and corrosion-resistant coating described in accordance with the claim 1, it is characterised in that：It is described
The chemical composition of CoNiCrAlY is：Ni is 31-34wt.%, and Cr 24.5-26.5wt.%, Al 5-6.5wt.%, Y are
0.4-0.8wt.%, surplus Co.
6. catalytic cracking unit valve wear-and corrosion-resistant coating according to claim 4, it is characterised in that：The wear-and corrosion-resistant
The average hardness of coating is not less than 58HRC, and average bonding strength is not less than 40MPa；Its working surface layers of the wear-and corrosion-resistant coating
Porosity is not higher than 1%.
7. special according to the preparation method of any catalytic cracking unit valve wear-and corrosion-resistant coatings of claim 1-6
Sign is：This method prepares Ni based alloy coatings by supersonic flame spraying technique in valve surface first, then uses again
Supersonic flame spraying technique prepares Co based alloy coatings in Ni based alloy coating surfaces；The supersonic flame spraying technical staff
Skill parameter is：Oxygen flow 1750-2100SCFH, kerosene 5-8GPH, powder sending quantity 50-70g/min, powder feeding throughput 20-
26SCFH, spray distance 350-400mm.
8. the preparation method of catalytic cracking unit valve wear-and corrosion-resistant coating according to claim 7, it is characterised in that：
The powder size that the Ni based alloys coating uses when preparing is 10-30 μm；The powder that the Co based alloys coating uses when preparing
Last granularity is 15-45 μm.
9. the preparation method of catalytic cracking unit valve wear-and corrosion-resistant coating according to claim 6, it is characterised in that：
The powder constituent that the Co based alloys coating uses when preparing for：Wear-resisting phase WC and Cr2C3, lubrication phase CaF2, Binder Phase
CoNiCrAlY；The content of each component is identical as each phase content in Co based alloy coatings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810671283.0A CN108486522A (en) | 2018-06-26 | 2018-06-26 | A kind of catalytic cracking unit valve wear-and corrosion-resistant coating and preparation method thereof |
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| CN201810671283.0A CN108486522A (en) | 2018-06-26 | 2018-06-26 | A kind of catalytic cracking unit valve wear-and corrosion-resistant coating and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616393A (en) * | 2019-10-31 | 2019-12-27 | 西华大学 | Valve overflowing surface wear-resistant corrosion-resistant spray coating and preparation method thereof |
| CN112626444A (en) * | 2020-12-04 | 2021-04-09 | 苏州迈科易新材料有限公司 | Supersonic flame spraying nozzle and using method thereof |
| CN114455757A (en) * | 2022-01-06 | 2022-05-10 | 纳美盾新材料有限公司 | Water purification treatment system and process thereof |
| CN115138539A (en) * | 2022-06-28 | 2022-10-04 | 贵州兰鑫石墨机电设备制造有限公司 | Glue injection repairing method and glue injection device for abnormal sound of distance tube of graphite tube heat exchanger |
| CN115231668A (en) * | 2022-07-15 | 2022-10-25 | 北京航空航天大学 | Multi-dimensional fusion automatic medicine feeding method, device and equipment |
| CN115852236A (en) * | 2022-12-07 | 2023-03-28 | 陕西柴油机重工有限公司 | Preparation method of large-tonnage thick-large-section wind power main frame |
| CN117105673A (en) * | 2023-10-24 | 2023-11-24 | 内蒙古工业大学 | Aluminum nitride complex phase ceramic and preparation method thereof |
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| US5141821A (en) * | 1989-06-06 | 1992-08-25 | Hermann C. Starck Berlin Gmbh & Co Kg | High temperature mcral(y) composite material containing carbide particle inclusions |
| CN1441084A (en) * | 2002-02-25 | 2003-09-10 | 株式会社荏原制作所 | Coating material with anti-corrosion and anti-wear property |
| CN107868926A (en) * | 2017-11-20 | 2018-04-03 | 中国科学院兰州化学物理研究所 | A kind of preparation method of the anti-sticking wear-resisting coating of high temperature lubricating |
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| US5141821A (en) * | 1989-06-06 | 1992-08-25 | Hermann C. Starck Berlin Gmbh & Co Kg | High temperature mcral(y) composite material containing carbide particle inclusions |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110616393A (en) * | 2019-10-31 | 2019-12-27 | 西华大学 | Valve overflowing surface wear-resistant corrosion-resistant spray coating and preparation method thereof |
| CN110616393B (en) * | 2019-10-31 | 2021-09-07 | 西华大学 | Valve overflowing surface wear-resistant corrosion-resistant spray coating and preparation method thereof |
| CN112626444A (en) * | 2020-12-04 | 2021-04-09 | 苏州迈科易新材料有限公司 | Supersonic flame spraying nozzle and using method thereof |
| CN114455757A (en) * | 2022-01-06 | 2022-05-10 | 纳美盾新材料有限公司 | Water purification treatment system and process thereof |
| CN114455757B (en) * | 2022-01-06 | 2024-01-19 | 纳美盾新材料有限公司 | Water purification treatment system and process thereof |
| CN115138539A (en) * | 2022-06-28 | 2022-10-04 | 贵州兰鑫石墨机电设备制造有限公司 | Glue injection repairing method and glue injection device for abnormal sound of distance tube of graphite tube heat exchanger |
| CN115138539B (en) * | 2022-06-28 | 2024-05-03 | 贵州兰鑫石墨机电设备制造有限公司 | Glue injection repairing method and glue injection device for abnormal sound of distance tube of graphite tube heat exchanger |
| CN115231668A (en) * | 2022-07-15 | 2022-10-25 | 北京航空航天大学 | Multi-dimensional fusion automatic medicine feeding method, device and equipment |
| CN115852236A (en) * | 2022-12-07 | 2023-03-28 | 陕西柴油机重工有限公司 | Preparation method of large-tonnage thick-large-section wind power main frame |
| CN117105673A (en) * | 2023-10-24 | 2023-11-24 | 内蒙古工业大学 | Aluminum nitride complex phase ceramic and preparation method thereof |
| CN117105673B (en) * | 2023-10-24 | 2023-12-29 | 内蒙古工业大学 | Aluminum nitride complex phase ceramic and preparation method thereof |
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