CN111676437A - Powder core wire for in-situ synthesis of high-temperature erosion-resistant amorphous coating and application - Google Patents
Powder core wire for in-situ synthesis of high-temperature erosion-resistant amorphous coating and application Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 83
- 239000011248 coating agent Substances 0.000 title claims abstract description 80
- 230000003628 erosive effect Effects 0.000 title claims abstract description 48
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 12
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 12
- NUEWEVRJMWXXFB-UHFFFAOYSA-N chromium(iii) boride Chemical compound [Cr]=[B] NUEWEVRJMWXXFB-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910000592 Ferroniobium Inorganic materials 0.000 claims abstract description 12
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 12
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 11
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- ZFGFKQDDQUAJQP-UHFFFAOYSA-N iron niobium Chemical compound [Fe].[Fe].[Nb] ZFGFKQDDQUAJQP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010935 stainless steel Substances 0.000 claims abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims description 36
- 238000011049 filling Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 239000000919 ceramic Substances 0.000 abstract description 8
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 abstract description 7
- 238000011089 mechanical engineering Methods 0.000 abstract description 5
- 239000011162 core material Substances 0.000 description 28
- 238000005516 engineering process Methods 0.000 description 10
- 238000002156 mixing Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 8
- 238000010891 electric arc Methods 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 229910052796 boron Inorganic materials 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
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- 238000004806 packaging method and process Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000005491 wire drawing Methods 0.000 description 4
- 229910000521 B alloy Inorganic materials 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229910052752 metalloid Inorganic materials 0.000 description 3
- 238000005272 metallurgy Methods 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 239000010955 niobium Substances 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000010965 430 stainless steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- JMAHHHVEVBOCPE-UHFFFAOYSA-N [Fe].[Nb] Chemical compound [Fe].[Nb] JMAHHHVEVBOCPE-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
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- 239000003546 flue gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
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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
- C23C4/06—Metallic material
-
- B22F1/0003—
-
- 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
- C23C4/131—Wire arc spraying
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to an in-situ synthesized high-temperature erosion resistant amorphous coating cored wire, which is prepared by coating a stainless steel sheath with a powder core, wherein the powder core comprises the following components in percentage by mass: 30-45% of chromium boron powder, 8-15% of boron carbide powder, 8-15% of ferrosilicon and 35-45% of ferroniobium powder. The invention also provides a high-temperature erosion resistant amorphous coating synthesized in situ by adopting the powder core wire. The invention also provides the application of the powder core wire material in-situ synthesis of the high-temperature erosion resistant amorphous coating. The amorphous coating prepared by doping the alloy powder and the ceramic powder has excellent high-temperature erosion and wear resistance, provides an effective measure for solving the problem of erosion and wear of mechanical engineering equipment in a high-temperature environment, and has wide application prospect.
Description
Technical Field
The invention relates to high-temperature erosion abrasion protection of the surface of a key part of engineering equipment, in particular to a powder core wire for in-situ synthesis of a high-temperature erosion resistant amorphous coating and application thereof.
Background
The abrasion mode of engineering materials has various forms, wherein erosion abrasion is a common form, is an important reason for damaging and discarding machine equipment and parts thereof, and has great hazard to industrial production. For example: the dust or sand particles erode and wear the engine of the high-speed rotating aircraft, so that the service life of the engine is reduced by 90 percent; compressor blades wear from erosion, resulting in local stall; pipelines in a thermal power generation system, wear-resistant parts in a coal gasification system, flow passage parts in a slurry pump and the like are eroded and worn; in the pipeline conveying device, the erosion wear rate of the pipeline at the elbow is about 50 times that of the pipeline at the straight pipe. In order to effectively control the damage of the erosion wear to mechanical parts and prolong the service life of equipment and materials, domestic and foreign scholars also carry out research on various aspects of the erosion wear, and a ceramic or alloy coating with a certain thickness is coated on the surface of a base material by adopting a surface technology, so that the method is an effective protection measure. Although the anti-erosion and wear-resistant coating is also researched and reported in China, the anti-erosion and wear-resistant coating is in a starting stage, and the ceramic hard coating for resisting erosion and wear resistance prepared by adopting a physical vapor deposition technology is not applied in practice. The preparation technology and application of the anti-erosion and abrasion coating in China lags behind developed countries such as Europe and America, so that the flight life of a domestic airplane in a sand dust environment is short, and the reliability and safety performance are poor, thereby restricting the national defense capability of China to a certain extent. And with the development of society, the requirements of equipment and devices are higher and the service conditions are stricter and stricter, the traditional surface coating material is difficult to meet the long-life service requirement of engineering components in a strict environment, and the development of efficient novel high-temperature erosion resistant protective coatings is imperative.
CN201710860694.X discloses a powder core wire for preparing a high amorphous content coating, a preparation method and application thereof, wherein the wire is prepared by coating a powder core with a 430 stainless steel outer skin, the powder core is formed by mixing alloy powder of seven elements, and the powder core comprises the following components in percentage by mass: 6-15 wt.% Cr, 4-6 wt.% B, 3-5 wt.% Si, 4-7 wt.% Nb, 8-12 wt.% Mo, 1-2.5 wt.% C, and the balance Fe; the filling rate of the powder core is 37-39%, and the diameter of the powder core wire is 2 mm. Although the patent application can form a coating with high amorphous content, the powder core material of the coating is formed by alloy powder, so that the phase change generated by an amorphous structure in the coating in a high-temperature environment enables the mechanical property of the coating to be evaluated, and the element composition is more, so that the powder core filling rate is increased, and the preparation difficulty of the wire is increased.
Disclosure of Invention
Aiming at the problem of erosion wear failure of key parts of mechanical engineering equipment in a high-temperature environment, the invention provides the cored wire for in-situ synthesis of the high-temperature erosion-resistant amorphous coating and the application thereof, which can improve the amorphous content of the amorphous coating and reduce the powder core filling rate.
The invention provides a powder core wire for in-situ synthesis of a high-temperature erosion-resistant amorphous coating, which is prepared by coating a powder core with a stainless steel sheath, wherein the powder core comprises the following components in percentage by mass: 30-45% of chromium boron powder, 8-15% of boron carbide powder, 8-15% of ferrosilicon and 35-45% of ferroniobium powder. The powder core wire material of the invention is composed of alloy powder and ceramic powder, and the addition of the ceramic powder further improves the hardness and high-temperature stability of the coating while improving the amorphous content, reduces the filling rate of the powder core wire material, and improves the process problem that the wire material is easy to break in the drawing preparation process.
Preferably, the filling rate of the powder core wire is 28-30%.
Preferably, the powder core comprises the following components in percentage by mass: 36-40% of chromium boron powder, 10-15% of boron carbide powder, 10-15% of ferrosilicon and 37-42% of ferroniobium powder.
Preferably, the diameter of the powder core wire is 2 mm.
Preferably, the stainless steel sheath is 430 stainless steel.
Preferably, the chromium boron powder is a chromium boron alloy powder in which a metalloid element boron and a metal element chromium are alloyed. The chromium boron alloy powder is better able to participate in the dynamic metallurgical behavior of the arc zone during high speed arc spraying. The difference from the single use of chromium and boron elements is that: the chromium boron alloy powder has a lower melting point and better conductivity, thereby improving the stability of the spraying process and greatly reducing the cost.
Preferably, in the boron carbide powder, the metalloid elements carbon and boron are both introduced in the form of a ceramic boron carbide powder. This promotes the participation of metalloids of small atomic size in the metallurgical reaction, reducing the burning loss of the elements, and also increasing the hardness and high temperature performance of the coating. The difference from the single use of carbon and boron is that: the melting point of the simple substance element and the filling rate of the wire material are reduced.
Preferably, the ferrosilicon is # 75 ferrosilicon. The addition of ferrosilicon makes the small atomic size silicon element participate in metallurgical reaction more easily. The difference from the single use of silicon and iron elements is that: the melting point of the iron and the silicon element is reduced, and the conductivity of the simple substance silicon element is improved.
Preferably, the ferrocolumbium powder is a ferrocolumbium powder in which a niobium element of a large atom in the ferrocolumbium has been alloyed. This makes the metal element with small atoms dissolved into the crystal lattice with large atoms to form amorphous structure in the arc zone instant metallurgical process. The difference from the single use of the niobium and the iron is that: the ferrocolumbium reduces the melting point and the cost of the elemental element niobium and improves the stability of electric arc metallurgy in the spraying process.
The invention also provides an application of the powder core wire material in-situ synthesis of the high-temperature erosion resistant amorphous coating. The high-temperature erosion resistant amorphous coating is prepared by dynamic metallurgy in-situ synthesis of alloy powder and ceramic powder doping of powder core wires, and is simple and easy to implement. The amorphous structure coating of the high-temperature erosion resistant amorphous coating has obvious high-temperature erosion and abrasion resistant effect, and effectively prolongs the service life of key parts of mechanical engineering equipment.
Preferably, the amorphous content of the high-temperature erosion resistant amorphous coating is more than or equal to 95 percent, the porosity is less than 2 percent, the bonding strength of the coating is more than or equal to 50MPa, and the hardness of the coating is 1000-1400 HV100Within the range.
Preferably, the high-temperature erosion resistant amorphous coating is synthesized in situ from the powder core wire through dynamic metallurgy in an arc area of electric arc spraying.
Preferably, the process parameters for in-situ synthesis of the high-temperature erosion resistant amorphous coating by using the high-speed arc spraying technology comprise: the spraying voltage is 34V-36V, the spraying current is 150A-160A, the spraying distance is 180mm-220mm, and the spraying pressure is 06MPa-0.7 MPa.
Preferably, the high temperature erosion resistant amorphous coating is used as a high temperature erosion wear protection coating. Further, the high-temperature erosion resistant amorphous coating is used as a high-temperature erosion abrasion protective coating for key parts such as petrochemical pipelines, flue gas turbine blades and the like.
The invention can synthesize compact and continuous amorphous coating on the cooled steel matrix in situ by reasonably designing the content of each component of the powder core and adopting the existing high-speed electric arc spraying technology. The amorphous content of the amorphous coating prepared by the method is more than or equal to 95 percent, the porosity is less than 2 percent, the bonding strength of the coating is more than or equal to 50MPa, and the hardness of the coating is 1000-1400 HV100Within the range. The amorphous coating prepared by doping the alloy powder and the ceramic powder has excellent high-temperature erosion and wear resistance, provides an effective measure for solving the problem of erosion and wear of mechanical engineering equipment in a high-temperature environment, and has wide application prospect.
Drawings
FIG. 1 is an X-ray diffraction pattern of an amorphous coating prepared according to example 1 of the present invention;
FIG. 2 is a cross-sectional profile of an amorphous coating prepared according to example 2 of the present invention;
FIG. 3 is a graph of microhardness profiles at different temperatures for amorphous coatings prepared according to example 3 of the present invention;
FIG. 4 is a graph of erosion rate at different temperatures for amorphous coatings prepared according to example 4 of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
A430 stainless steel strip of 10X 0.3mm (width 10mm, thickness 0.3mm) was selected. It is first rolled into a U-shape. The powder core comprises the following components in percentage by mass: 30% of chromium-boron powder, 15% of boron carbide powder, 10% of 75# ferrosilicon, 45% of ferroniobium powder and weighing ingredients. And (3) putting the powder into a powder mixing machine, mixing for 4h, adding the mixed powder into a U-shaped 430 steel belt groove, wherein the filling rate is 28%. Then closing the U-shaped groove to coat the powder therein, and gradually reducing the diameter to phi 2mm through a wire drawing die. Winding the finished wire into a disc shape required by delivery, and metering and packaging to form a product capable of delivery. The technological parameters for preparing the coating by utilizing the high-speed electric arc spraying technology are as follows: the spraying voltage is 36V, the spraying current is 150A, the spraying distance is 200mm, and the spraying air pressure is 0.7 Mpa.
The X-ray diffraction pattern of the aluminum-based amorphous coating prepared in example 1 is shown in fig. 1. It can be seen that a diffuse scattering peak appears at 2 θ ═ 45 °, which is the XRD pattern typical of amorphous structures, indicating that amorphous structures are formed during deposition of the coating. The amorphous content in the coating was found to be 96.8% (volume fraction).
Example 2
A430 stainless steel strip of 10X 0.3mm (width 10mm, thickness 0.3mm) was selected. It is first rolled into a U-shape. The powder core comprises the following components in percentage by mass: 36% of chromium-boron powder, 12% of boron carbide powder, 15% of 75# ferrosilicon, 37% of ferroniobium powder and weighing ingredients. And (3) putting the powder into a powder mixing machine, mixing for 4h, adding the mixed powder into a U-shaped 430 steel belt groove, wherein the filling rate is 28%. Then closing the U-shaped groove to coat the powder therein, and gradually reducing the diameter to phi 2mm through a wire drawing die. Winding the finished wire into a disc shape required by delivery, and metering and packaging to form a product capable of delivery. The technological parameters for preparing the coating by utilizing the high-speed electric arc spraying technology are as follows: the spraying voltage is 35V, the spraying current is 160A, the spraying distance is 200mm, and the spraying air pressure is 0.7 MPa.
The cross-sectional morphology of the amorphous coating prepared in example 2 is shown in fig. 2. It can be seen that: the coating structure was dense with only a small amount of black pores present in the coating, and the porosity of the coating was analyzed to be 1.6%. The bonding strength of the coating was 55.6 MPa.
Example 3
A430 stainless steel strip of 10X 0.3mm (width 10mm, thickness 0.3mm) was selected. It is first rolled into a U-shape. The powder core comprises the following components in percentage by mass: 40% of chromium-boron powder, 10% of boron carbide powder, 8% of 75# ferrosilicon, 42% of niobium iron powder and weighing ingredients. And (3) putting the powder into a powder mixing machine, mixing for 4h, and adding the mixed powder into a U-shaped 430 steel belt groove, wherein the filling rate is 30%. Then closing the U-shaped groove to coat the powder therein, and gradually reducing the diameter to phi 2mm through a wire drawing die. Winding the finished wire into a disc shape required by delivery, and metering and packaging to form a product capable of delivery. The technological parameters for preparing the coating by utilizing the high-speed electric arc spraying technology are as follows: the spraying voltage is 34V, the spraying current is 160A, the spraying distance is 200mm, and the spraying air pressure is 0.65 MPa.
The section hardness of the amorphous coating prepared in example 3 at different temperatures is shown in fig. 3. It can be seen that: the hardness of the coating is 1000-1400 HV100In this range, the porosity of the coating was 1.5%.
Example 4
A430 stainless steel strip of 10X 0.3mm (width 10mm, thickness 0.3mm) was selected. It is first rolled into a U-shape. The powder core comprises the following components in percentage by mass: 45% of chromium-boron powder, 8% of boron carbide powder, 12% of 75# ferrosilicon, 35% of ferroniobium powder and weighing ingredients. And (3) putting the powder into a powder mixing machine, mixing for 4h, and adding the mixed powder into a U-shaped 430 steel belt groove, wherein the filling rate is 30%. Then closing the U-shaped groove to coat the powder therein, and gradually reducing the diameter to phi 2mm through a wire drawing die. Winding the finished wire into a disc shape required by delivery, and metering and packaging to form a product capable of delivery. The technological parameters for preparing the coating by utilizing the high-speed electric arc spraying technology are as follows: the spraying voltage is 35V, the spraying current is 150A, the spraying distance is 200mm, and the spraying air pressure is 0.7 MPa.
The amorphous coating prepared in example 4 had an amorphous content of 97.8% (volume fraction) and an average bond strength of 56.5 MPa; the average microhardness of the coating at normal temperature is 1068.6 HV. For the high-entropy amorphous coating prepared in example 4, the steam flow is 7.5m at 180 DEG C3The erosion abrasion test is carried out under the conditions of powder feeding rate of 4g/min, erosion angle of 45 degrees and erosion time of 2min, and the erosion abrasion test is compared with a 20# boiler steel matrix, as shown in figure 4. It can be seen that under the same test conditions, the erosion rate of the high-entropy amorphous coating is obviously lower than that of the No. 20 steel substrate, which shows that the high-entropy amorphous coating has excellent high-temperature erosion resistance.
The powder core wire prepared by the embodiment of the invention has strong amorphous forming capability, and a compact continuous amorphous coating can be synthesized in situ on a cooled steel matrix by adopting a high-speed electric arc spraying technology. The coating has a compact structure, the amorphous content is more than or equal to 95 percent, the porosity is less than 2 percent, the bonding strength of the coating is more than or equal to 50MPa, and the hardness of the coating is 1000-1400 HV100In the range, the coating has excellent high-temperature erosion and wear resistance; the service life of mechanical engineering equipment in a high-temperature erosive wear environment can be obviously prolonged.
The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.
Claims (9)
1. The powder core wire for in-situ synthesis of the high-temperature erosion resistant amorphous coating is prepared by coating a stainless steel outer skin on a powder core, and is characterized in that the powder core comprises the following components in percentage by mass: 30-45% of chromium boron powder, 8-15% of boron carbide powder, 8-15% of ferrosilicon and 35-45% of ferroniobium powder.
2. The cored wire of claim 1, wherein the filling ratio of the cored wire is 28 to 30%.
3. The cored wire of claim 1, wherein the composition of the powder core comprises the following components in percentage by mass: 36-40% of chromium boron powder, 10-15% of boron carbide powder, 10-15% of ferrosilicon and 37-42% of ferroniobium powder.
4. The cored wire of claim 1, wherein the diameter of the cored wire is 2 mm.
5. Use of the cored wire of any of claims 1 to 4 for in situ synthesis of high temperature erosion resistant amorphous coatings.
6. The application of the coating as claimed in claim 5, wherein the amorphous content of the high temperature erosion resistant amorphous coating is not less than 95%, the porosity is less than 2%, the bonding strength of the coating is not less than 50MPa, and the hardness of the coating is 1000-1400 HV100Within the range.
7. The use according to claim 5, wherein the high temperature erosion resistant amorphous coating is dynamically metallurgically synthesized in situ from the cored wire via an arc spray arc zone.
8. The use according to claim 7, wherein the process parameters for in-situ synthesis of the high temperature erosion resistant amorphous coating by high speed arc spraying technique comprise: the spraying voltage is 34V-36V, the spraying current is 150A-160A, the spraying distance is 180mm-220mm, and the spraying pressure is 06MPa-0.7 MPa.
9. Use according to claim 5, wherein the high temperature erosion resistant amorphous coating is used as a high temperature erosion wear protection coating.
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| RU2008114228A (en) * | 2007-04-13 | 2009-10-20 | Вертзиле Швайц АГ (CH) | METHOD OF THERMAL SPRAYING FOR APPLICATION OF COATING IN THE PISTON RING groove, APPLICATION OF SPRAYED WIRE, AND ALSO PISTON WITH THERMALLY SPRAYED COATING |
| CN102703849A (en) * | 2012-05-21 | 2012-10-03 | 北京工业大学 | Cored wire for preparing FeCrB coating through electric arc spraying and coating preparation method |
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