CN111850542A - Joint row processing cladding method for boiler tubes - Google Patents
Joint row processing cladding method for boiler tubes Download PDFInfo
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- CN111850542A CN111850542A CN202010558173.0A CN202010558173A CN111850542A CN 111850542 A CN111850542 A CN 111850542A CN 202010558173 A CN202010558173 A CN 202010558173A CN 111850542 A CN111850542 A CN 111850542A
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- cladding
- boiler
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- row
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- 238000005253 cladding Methods 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 54
- 229910052742 iron Inorganic materials 0.000 claims description 27
- 238000003466 welding Methods 0.000 claims description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 235000000396 iron Nutrition 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a method for processing and cladding a row of boiler tubes, which comprises the following steps: s1: processing before cladding, namely manufacturing a plurality of boiler tubes into a row boiler tube; s2: performing surface pretreatment on the processed gang boiler pipe, and determining a cladding area; s3: and (2) high-speed cladding, namely clamping the pretreated gang boiler tubes on a gang boiler tube bearing tool for alignment, then setting cladding laser parameters, conveying the cladding laser with the set parameters to the initial section of a cladding area of the gang boiler tubes, filling cladding powder, and cladding.
Description
Technical Field
The invention belongs to the technical field of boiler tube processing, and particularly relates to a method for processing and cladding a row of boiler tubes.
Background
The boiler tubes are widely used under high-temperature and high-pressure conditions such as superheated steam tubes and boiling water tubes, and a plurality of boiler tubes are sometimes used in parallel as required.
The burst leakage of the boiler pipe is one of the important reasons causing unplanned shutdown, and the failure reason thereof may have defects such as overtemperature, abrasion, corrosion and the like, wherein the number of accidents caused by abrasion failure is relatively large, the heating surface of the boiler pipe wall is continuously washed by high-speed smoke when the boiler pipe is at the high temperature of 500 plus one furnace at 1200 ℃, and the pipe wall becomes thinner due to abrasion until the pipe is burst.
In the prior art, a plurality of boiler pipes are used side by side, and each boiler pipe is required to be subjected to explosion-proof treatment independently, so that the efficiency is low, and the explosion-proof effect of each boiler pipe is different when the boiler pipe is used due to the inevitable difference after the boiler pipe is treated.
Accordingly, further developments and improvements are still needed in the art.
Disclosure of Invention
Aiming at various defects in the prior art, in order to solve the problems, the method for cladding the boiler tube in the row processing mode is provided, a plurality of boiler tubes are connected together to form the integral boiler tube in the row, cladding treatment is carried out on the boiler tube in the row, cladding efficiency is higher in the whole process, the explosion-proof effect of the boiler tube in the row is good for the whole person, consistency is high, and the condition that the explosion-proof effects of the boiler tubes are inconsistent is avoided.
In order to achieve the purpose, the invention provides the following technical scheme:
A method for processing and cladding a row of boiler tubes comprises the following steps:
s1: processing before cladding, namely manufacturing a plurality of boiler tubes into a row boiler tube;
s2: performing surface pretreatment on the processed gang boiler pipe, and determining a cladding area;
s3: and (3) high-speed cladding, namely clamping the pretreated header boiler pipe on a header boiler pipe bearing tool for alignment, setting cladding laser parameters, conveying the cladding laser with the set parameters to the initial section of a cladding area of the header boiler pipe, filling cladding powder, and cladding.
Preferably, a single boiler pipe is made into a combined boiler pipe, specifically, a plurality of boiler pipes are taken, each boiler pipe is bent at a position 20-40 cm away from the end, two ends of each boiler pipe are bent, the bent boiler pipes are arranged in parallel, and flat irons used for connecting the two boiler pipes are welded at the arrangement gap of the boiler pipes to make the combined boiler pipe.
Preferably, the boiler pipe welding position is a position where a boiler pipe is not bent and contacts with the flat iron, the boiler pipe welding area is an included angle area corresponding to the boiler pipe and the flat iron, the central angle corresponding to the area is 5-15 degrees, and the welding area is located on the upper half portion of the boiler pipe.
Preferably, the boiler tube welding area is an included angle area corresponding to two adjacent boiler tubes, the length of the band iron is equal to the length of an unbent area of the boiler tubes, the width of the band iron is 20-70mm, and the thickness of the band iron is 4-8 mm.
Preferably, the surface pretreatment method specifically comprises: and grinding, polishing and derusting the boiler tubes, and wiping the derusted boiler tubes with alcohol to remove oil stains.
Preferably, the cladding area of the boiler tube in the row is as follows: the upper half part of the non-bending part of the boiler tubes, the space between the welding areas of the boiler tubes and the upper surface of the flat iron.
Preferably, the parameters of the cladding laser in S3 are specifically: the power is 2000w, the diameter of a light spot is 1.5mm-2.5mm, the cladding linear velocity is 100m/min-150m/min, the distance between a cladding head and a cladding surface is 12mm-14mm, and the step pitch is 0.2mm-0.4 mm.
Preferably, the specific parameters of the cladding powder are that the cladding powder is 300-500 meshes, the powder output amount of the cladding powder is 2.8-3.0 r/min, the cladding powder is subjected to powder output cladding under Ar protective gas, and the flow of the Ar protective gas is 15-16L/min.
Preferably, the thickness of the cladding layer of the row boiler tube after cladding is 1.5mm-2 mm.
Preferably, the cladding powder is nickel-based alloy cladding powder.
Has the advantages that:
The invention discloses a boiler tube row processing cladding method, which can weld boiler tubes in rows according to requirements, then carry out high-speed cladding, and quickly form a cladding layer in a short time at a higher linear speed.
Drawings
FIG. 1 is a flow chart of a method for cladding by inline processing of boiler tubes according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an unbent portion of a method for cladding a row of boiler tubes according to an embodiment of the present invention.
In the drawings: 100 weld zone, 200 cladding zone, 300 flat iron.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
As shown in fig. 1 and 2, the invention provides a method for cladding a row of boiler tubes, which comprises the following steps:
s1: processing before cladding, namely manufacturing a plurality of boiler pipes into a gang boiler pipe, specifically, taking a plurality of boiler pipes, bending a position of each boiler pipe, which is 20-40 cm away from the end, of each boiler pipe, bending two ends of each boiler pipe, arranging the bent boiler pipes in parallel, welding a flat iron 300 for connecting the two boiler pipes at the arrangement gap of the boiler pipes to manufacture the gang boiler pipe, wherein the welding position of the boiler pipes is a contact part of the un-bent part of the boiler pipes and the flat iron 300, a boiler pipe welding area 100 is an included angle area corresponding to the boiler pipes and the flat iron 300, the central angle of the area is 5-15 degrees, the welding area 100 is positioned at the upper half part of the boiler pipes, the length of the flat iron 300 is equal to that of the un-bent part of the boiler pipes, the width of the flat iron 300 is 20-70mm, and the thickness of the flat iron is 4-8 mm;
s2: performing surface pretreatment on the processed gang boiler tube, and determining a cladding area 200, wherein the surface pretreatment method specifically comprises the following steps: polishing and derusting the gang boiler tubes, and wiping the derusted gang boiler tubes with alcohol to remove oil stains, wherein a cladding area 200 of the gang boiler tubes is as follows: the upper half part of the unbent part of the boiler tubes, the space between the welding areas of the boiler tubes and the upper surface of the flat iron 300;
S3: and (3) high-speed cladding, namely clamping the pretreated boiler tubes on a boiler tube carrying tool for alignment, and setting cladding laser parameters as follows: the power is 2000w, the diameter of a light spot is 1.5-2.5 mm, the cladding linear speed is 100-150 m/min, the distance between a cladding head and a cladding surface is 12-14 mm, the step distance is 0.2-0.4 mm, a cladding laser with set parameters is conveyed to the beginning section of a cladding area 200 of the boiler tube in parallel arrangement, cladding powder is filled, the specific parameters of the cladding powder are 300-500 meshes, the powder discharge amount of the cladding powder is 2.8-3.0 r/min, the cladding powder is subjected to powder discharge cladding under Ar protective gas, and the gas flow rate of the Ar protective gas is 15-16L/min for cladding.
Specifically, the thickness of the cladding layer of the row boiler tube after cladding is 1.5mm-2 mm.
Specifically, the cladding powder is nickel-based alloy cladding powder.
In some embodiments, a certain amount of chromium element is added into the nickel-based alloy cladding powder, the high-temperature corrosion performance and the oxidation resistance can be improved, the nickel-based alloy cladding powder has rigidity and high plasticity below 700 ℃, meanwhile, the alloy has excellent stress corrosion resistance due to the high nickel content, the strong corrosion resistance can be kept in an alkaline environment, and the corrosion resistance of the alloy in an oxidation environment is more excellent due to the added chromium element.
The first embodiment is as follows:
a boiler tube row processing method includes the steps that 7 boiler tubes are taken, each boiler tube is bent at a position 25CM away from an end, two ends of each boiler tube are bent, the bent boiler tubes are arranged in parallel, flat irons 300 used for connecting beam boiler tubes are welded at arrangement gaps of the boiler tubes, a welding area 100 is an included angle area corresponding to the boiler tubes and the flat irons 300, a central angle corresponding to the area is 7.5 degrees, the welding area is located on the upper half portion of each boiler tube, the width of each flat iron 300 is 45mm, and the thickness of each flat iron is 6 mm.
And then, grinding and polishing the surfaces of the welded header boiler pipes by using sand paper until the surfaces of the boiler pipes have metallic luster, removing rust, wiping the rust-removed header boiler pipes by using alcohol, and determining a cladding area 200 of the header boiler pipes, wherein the cladding area 200 is as follows: the upper half part of the unbent part of the boiler tubes in the row, the welding area of the boiler tubes, namely the upper half part of the boiler tubes within 165 degrees, and the upper surface of the flat iron 300.
And clamping the pretreated header boiler tubes on a header boiler tube bearing tool for alignment. And then setting parameters of a high-speed cladding laser: the method comprises the steps of enabling the power to be 2000w, enabling the diameter of a light spot to be 1.7mm, enabling a cladding linear speed to be 120m/min, enabling a step pitch to be 0.3mm and enabling a cladding head to be 12mm from a cladding surface, sending a cladding laser with set parameters to a beginning section of a cladding area 200 of a boiler tube in a gang boiler, then filling cladding powder, wherein the cladding powder comprises the following components, by mass, C-0.72%, Cr-16.58%, Si-3.8%, Mo-2.1%, Cu-1.95%, B-3.18%, Fe-3.58% and the balance of Ni, the cladding powder is 300 meshes and 500 meshes, setting the powder discharge amount of the cladding powder to be 2.8 revolutions per minute, discharging the cladding powder under the protection of Ar gas after cladding is started, and enabling the flow of the Ar gas to be 15L/min for cladding.
Carrying out copper accelerated acetate spray test on the surface of the clad boiler tube bank: a salt spray test box is adopted, according to the requirements of GB/T10125-.
Example two:
the utility model provides a boiler tube's antithetical couplet row processing method, takes 9 boiler pipes, buckles each boiler pipe apart from end 20CM department, and both ends of each boiler pipe are all buckled, and the boiler pipe after will buckling is arranged side by side, and boiler pipe arranges the gap department and welds band iron 300 that is used for tie-beam boiler pipe, and welding area 100 is the boiler pipe and the contained angle region that band iron 300 corresponds, and the central angle that this region corresponds is 15, and affiliated welding area is located boiler pipe upper half, band iron 300 width is 55mm, and thickness is 5 mm.
And then, grinding and polishing the surfaces of the welded header boiler pipes by using sand paper until the surfaces of the boiler pipes have metallic luster, removing rust, wiping the rust-removed header boiler pipes by using alcohol, and determining a cladding area 200 of the header boiler pipes, wherein the cladding area 200 is as follows: the upper half part of the non-bent part of the boiler tubes in the row, the welding area of the boiler tubes, namely the upper half part of the boiler tubes within 150 degrees, and the upper surface of the flat iron 300.
And clamping the pretreated header boiler tubes on a header boiler tube bearing tool for alignment. And then setting parameters of a high-speed cladding laser: the method comprises the steps of enabling the power to be 2000w, enabling the diameter of a light spot to be 2mm, enabling the cladding linear speed to be 150m/min, enabling the step pitch to be 0.4mm, enabling a cladding head to be 14mm away from a cladding surface, sending a cladding laser with set parameters to the beginning section of a cladding area 200 of a boiler tube in a gang boiler, then filling cladding powder, wherein the cladding powder comprises the following components, by mass, C-0.72%, Cr-16.58%, Si-3.8%, Mo-2.1%, Cu-1.95%, B-3.18%, Fe-3.58% and the balance of Ni, the cladding powder is 300-mesh and 500-mesh, setting the powder discharge amount of the cladding powder to be 2.8 r/min, and after cladding is started, discharging the cladding powder under the protection of Ar gas, and enabling the flow of the Ar gas to be 16L/min for cladding.
Carrying out copper accelerated acetate spray test on the surface of the clad boiler tube bank: a salt spray test box is adopted, according to the requirements of GB/T10125-.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (10)
1. The method for processing and cladding the row of the boiler tubes is characterized by comprising the following steps of:
s1: processing before cladding, namely manufacturing a plurality of boiler tubes into a row boiler tube;
s2: performing surface pretreatment on the processed gang boiler pipe, and determining a cladding area;
s3: and (3) high-speed cladding, namely clamping the pretreated header boiler pipe on a header boiler pipe bearing tool for alignment, setting cladding laser parameters, conveying the cladding laser with the set parameters to the initial section of a cladding area of the header boiler pipe, filling cladding powder, and cladding.
2. The method for processing and cladding the united rows of boiler tubes according to claim 1, wherein a single boiler tube is made into a united row boiler tube, specifically, a plurality of boiler tubes are taken, each boiler tube is bent at a position 20-40 cm away from the end, two ends of each boiler tube are bent, the bent boiler tubes are arranged in parallel, and flat irons for connecting the two boiler tubes are welded at the arrangement gap of the boiler tubes to make the united row boiler tube.
3. The method for processing cladding of the connected rows of the boiler tubes according to claim 2, wherein the welding position of the boiler tubes is a contact position between an unbent part of the boiler tubes and the flat iron, the welding area of the boiler tubes is an included angle area corresponding to the boiler tubes and the flat iron, the included angle area corresponds to a central angle of 5-15 degrees, and the welding area is positioned on the upper half part of the boiler tubes.
4. The method for cladding the boiler tube gang processing of claim 3, wherein the length of the flat iron is equal to the length of an unbent area of the boiler tube, the width of the flat iron is 20-70mm, and the thickness of the flat iron is 4-8 mm.
5. The method for processing and cladding the row of boiler tubes according to claim 1, wherein the surface pretreatment method specifically comprises the following steps: and grinding, polishing and derusting the boiler tubes, and wiping the derusted boiler tubes with alcohol to remove oil stains.
6. The method for processing and cladding the row of boiler tubes according to claim 1, wherein the cladding area of the row of boiler tubes is as follows: the upper half part of the non-bending part of the boiler tubes, the space between the welding areas of the boiler tubes and the upper surface of the flat iron.
7. The method for processing and cladding the row of boiler tubes as claimed in claim 1, wherein the cladding laser parameters in S3 are specifically: the power is 2000w, the diameter of a light spot is 1.5mm-2.5mm, the cladding linear velocity is 100m/min-150m/min, the distance between a cladding head and a cladding surface is 12mm-14mm, and the step pitch is 0.2mm-0.4 mm.
8. The method for processing and cladding the connected rows of the boiler tubes as claimed in claim 1, wherein the specific parameters of the cladding powder are that the cladding powder is 300-500 mesh, the powder output amount of the cladding powder is 2.8-3.0 r/min, the cladding powder is subjected to powder output cladding under Ar protective gas, and the flow rate of the Ar protective gas is 15-16L/min.
9. The method for processing and cladding the row of boiler tubes according to claim 1, wherein the thickness of the cladding layer of the boiler tubes after cladding is 1.5mm-2 mm.
10. The method for processing and cladding the row of boiler tubes as claimed in claim 1, wherein the cladding powder is nickel-based alloy cladding powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010558173.0A CN111850542A (en) | 2020-06-18 | 2020-06-18 | Joint row processing cladding method for boiler tubes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010558173.0A CN111850542A (en) | 2020-06-18 | 2020-06-18 | Joint row processing cladding method for boiler tubes |
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| CN111850542A true CN111850542A (en) | 2020-10-30 |
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| CN202010558173.0A Pending CN111850542A (en) | 2020-06-18 | 2020-06-18 | Joint row processing cladding method for boiler tubes |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267281A (en) * | 2013-06-03 | 2013-08-28 | 哈尔滨科能熔敷科技有限公司 | Deposition robot and deposition method for water-cooled wall of fluidized bed boiler |
| CN107723704A (en) * | 2017-11-01 | 2018-02-23 | 上海业识科技有限公司 | The laser surface cladding method of thermal power station's boiler water-wall tube |
| CN108103498A (en) * | 2017-12-22 | 2018-06-01 | 北京机科国创轻量化科学研究院有限公司 | A kind of ultrahigh speed laser melting and coating process |
-
2020
- 2020-06-18 CN CN202010558173.0A patent/CN111850542A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267281A (en) * | 2013-06-03 | 2013-08-28 | 哈尔滨科能熔敷科技有限公司 | Deposition robot and deposition method for water-cooled wall of fluidized bed boiler |
| CN107723704A (en) * | 2017-11-01 | 2018-02-23 | 上海业识科技有限公司 | The laser surface cladding method of thermal power station's boiler water-wall tube |
| CN108103498A (en) * | 2017-12-22 | 2018-06-01 | 北京机科国创轻量化科学研究院有限公司 | A kind of ultrahigh speed laser melting and coating process |
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Inventor after: TanTai Fanliang Inventor after: Yang Fan Inventor after: Liu Peng Inventor after: Liu Hu Inventor after: Li Guanghao Inventor after: Tian Hongfang Inventor after: Hou Qingling Inventor after: Shi Chao Inventor after: Wang Bingqi Inventor after: Wang Wei Inventor before: TanTai Fanliang Inventor before: Yang Fan Inventor before: Liu Hu Inventor before: Li Guanghao Inventor before: Tian Hongfang Inventor before: Hou Qingling Inventor before: Shi Chao Inventor before: Wang Bingqi Inventor before: Wang Wei Inventor before: Dong Lei |
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Application publication date: 20201030 |