CN111250900A - Preparation method of modified Inconel625 powder surfacing coating - Google Patents

Preparation method of modified Inconel625 powder surfacing coating Download PDF

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Publication number
CN111250900A
CN111250900A CN202010112550.8A CN202010112550A CN111250900A CN 111250900 A CN111250900 A CN 111250900A CN 202010112550 A CN202010112550 A CN 202010112550A CN 111250900 A CN111250900 A CN 111250900A
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China
Prior art keywords
inconel625
powder
surfacing
coating
modified
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CN202010112550.8A
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CN111250900B (en
Inventor
熊剑
门丹丹
彭文屹
白凌云
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JIANGXI HENGDA HI-TECH CO LTD
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JIANGXI HENGDA HI-TECH CO LTD
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40—Making wire or rods for soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34—Laser welding for purposes other than joining
    • B23K26/342—Build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3033—Ni as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/362—Selection of compositions of fluxes
    • 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

Abstract

The invention discloses a preparation method of a modified Inconel625 powder surfacing coating, which takes domestic Inconel625 powder as an initial raw material, and Y is respectively used as a modified component2O3And aluminum powder. Wherein Y is2O3Is 0.5 wt%, and the Al powder is 20 wt%. Adopting laser plasma surfacing equipment to perform powder surfacing on the surface of Q235 steel to prepare Inconel625 and Y2O3Inconel625 and Al Inconel 625. Through the treatment of the cross section appearance, the metallographic structure, the microhardness, the high-temperature cyclic oxidation resistance and the molten salt corrosion resistance of the coatingThe results of the corrosion performance study show that: the surfacing layer is well combined with the matrix, the porosity is extremely low, and the coating quality is excellent; the Al Inconel625 coating achieved the greatest microhardness, with an average test value of 500 and the remainder of the samples being around 200. The coating prepared by the invention has good oxidation resistance.

Description

Preparation method of modified Inconel625 powder surfacing coating
Technical Field
The invention relates to the technical field of anticorrosive coating design, in particular to a preparation method of a modified Inconel625 powder surfacing coating.
Background
The Inconel625 has better corrosion resistance, particularly chlorine corrosion resistance and pitting corrosion resistance, and is already applied to the design and use of corrosion-resistant coatings on the inner walls of furnace bodies of garbage incinerators and the like. However, the product is expensive, and in order to further improve the corrosion resistance of the product and ensure the maximum utilization of capital cost, the invention proposes to add a modified element component into an Inconel625 powder matrix so as to further improve the corrosion resistance of the product.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a preparation scheme of the modified Inconel625 powder surfacing coating. By Y2O3Or the addition of Al improves the grain boundary performance of an Inconel625 structure and the like, and improves the molten salt corrosion resistance and the high-temperature oxidation resistance of the Inconel625 overlaying layer.
The invention adopts the following technical scheme:
the invention takes domestic Inconel625 powder as an initial raw material, and the modified components are respectively Y2O3And aluminum powder. Wherein Y is2O3Is 0.5 wt%, and the Al powder is 20 wt%. Adopting laser plasma surfacing equipment to perform powder surfacing on the surface of Q235 steel to prepare Inconel625 and Y2O3Inconel625 and Al Inconel 625. The surfacing adopts an end surface surfacing mode, the current is 80A, the powder feeding speed is 5r/s, the swinging distance is 4mm, the swinging speed is 10mm, the progressive distance is 5mm, and the thickness of the surfacing layer is 2 mm. The build-up welded sample is cut into 10x10x12mm samples by wire cutting, and then metallographic analysis and corrosion test are carried out.
The preparation method of the modified Inconel625 powder surfacing coating comprises the following specific steps:
firstly, a Q235 plate of 20x20x1.2cm is ground by 80#, 200#, 600# abrasive paper, surface oxide skin is removed, and the plate is cleaned by ethanol and naturally dried.
Secondly, adopting laser plasma surfacing equipment to perform powder surfacing on the surface of the Q235 steel material to prepare Inconel625 and Y2O3Inconel625, Al Inconel625, Y2O3Is 0.5 wt%, and the Al powder is 20 wt%. The surfacing adopts an end surface surfacing mode, the current is 80A, the powder feeding speed is 5r/s, the swinging distance is 4mm, the swinging speed is 10mm, the progressive distance is 5mm, and the thickness of the surfacing layer is 2 mm.
The build-up welded sample is cut into 10x10x12mm samples by wire cutting, and then metallographic analysis and corrosion test are carried out.
Compared with the prior art, the invention has the beneficial effects that: y is2O3The doping obviously improves the molten salt corrosion resistance and cyclic oxidation resistance of the coating, the hardness of the coating can be obviously improved by adding Al, the high-temperature cyclic oxidation resistance of the Inconel625 powder surfacing layer is improved, the metallurgical bonding is formed between the coating obtained by the surfacing process and a substrate, the porosity of the coating is negligible, and the quality is excellent.
Drawings
FIG. 1 is a technical route flow diagram;
FIG. 2 shows metallographic structure (500X) of different weld overlay layers;
FIG. 3 is a cross-sectional view (SEM) of a weld overlay
FIG. 4 is a kinetic curve of molten salt corrosion resistance of different overlaying layers (mass ratio NaCl: Na)2SO4＝1:1)；
FIG. 5 is a graph of the kinetics of cyclic oxidation at 800 deg.C for different weld overlays.
Detailed Description
The following examples are further detailed descriptions of the present invention.
Example 1
Firstly, a Q235 plate of 20x20x1.2cm is ground by 80#, 200#, 600# abrasive paper, surface oxide skin is removed, and the plate is cleaned by ethanol and naturally dried.
Secondly, adopting laser plasma surfacing equipment to perform powder surfacing on the surface of the Q235 steel material to prepare Inconel625 and Y2O3Inconel625, Al Inconel625, Y2O3Is 0.5 wt%, and the Al powder is 20 wt%. The surfacing adopts an end surface surfacing mode, the current is 80A, the powder feeding speed is 5r/s, the swinging distance is 4mm, the swinging speed is 10mm, the progressive distance is 5mm, and the thickness of the surfacing layer is 2 mm.
The build-up welded sample is cut into 10x10x12mm samples by wire cutting, and then metallographic analysis and corrosion test are carried out.
(1) Metallographic analysis:
1) and respectively grinding the samples of different coating materials on 240#, 800#, 1200# and 2000# sandpaper in sequence, and polishing until the surfaces are bright and have no scratches.
2) Preparing aqua regia corrosive liquid (HCl: HNO)33:1) and nital (4% HNO)3+ alcohol).
3) Mixing Inconel625, Y2O3Placing an Inconel625 sample in aqua regia corrosive liquid for corrosion for 1min, placing an Al Inconel625 sample in nitric acid-alcohol solution for corrosion for 5-6 s, soaking and washing the corroded sample with alcohol, drying, and observing, photographing and analyzing on an MDS 400 inverted metallographic microscope.
(2) And (3) hardness testing:
in order to ensure the smoothness of the test surface of the sample hardness, the sample surface coating is firstly polished to be smooth by 80# abrasive paper, the surfaces of No. A1-A4 samples are sequentially polished by 240#, 800#, 1200# and 2000# abrasive paper and polished, and then the surfaces of the samples are cleaned by alcohol and dried. And (3) measuring the hardness of samples of different coating materials by using an HXS-1000A micro Vickers hardness tester with the loading load of 300N and the loading time of 20s, selecting five points on the surface of each sample for measurement, removing the maximum value and the minimum value, and taking the average hardness value of the rest three points as a representative value.
(3) Molten salt corrosion:
and (4) grinding and polishing the sample, measuring the accurate size by using a vernier caliper, and weighing. Configured mass ratio Na2SO4The composite salt solution with NaCl of 1:1 is uniformly dripped on the surface of a sample coating by a dropper and dried by a blower. Placing the sample into a muffle furnace at 800 deg.C for corrosion test, taking out after 50min, air cooling for 10min, weighing, placing into the muffle furnace for continuous corrosion, and repeating the stepsThe cycle was 24 times.
(4) Cyclic oxidation:
and (3) removing the link of dripping the double-salt solution, and performing the same molten salt corrosion step as the step (3) for the rest of operations.
The results show that: the surfacing layer is well combined with the substrate, and the coating quality is excellent; the Al Inconel625 coating achieved the greatest microhardness, with an average test value of 500 and the remainder of the sample at around 200. Y is2O3The doping purifies the crystal boundary, and is beneficial to improving the corrosion resistance of the coating. The kinetic data of the 800 ℃ molten salt corrosion show that the oxidation resistance of the three coatings is Y from strong to weak2O3:Inconel625>Inconel625>Inconel625 as Al; the dynamic data of the cyclic oxidation at 800 ℃ show that the oxidation resistance of the three coatings is Y from strong to weak2O3:Inconel625>Al:Inconel625>Inconel625。
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. A preparation method of a modified Inconel625 powder surfacing coating is characterized by comprising the following steps: the Inconel625 powder is used as an initial raw material, and the modified components are respectively Y2O3And aluminum powder, overlaying the powder on the surface of the Q235 steel by adopting laser plasma overlaying equipment to respectively prepare Inconel625 and Y2O3Inconel625 and Al-Inconel 625, wherein the surfacing adopts an end surface surfacing mode, the current is 80A, the powder feeding speed is 5r/s, the swinging distance is 4mm, the swinging speed is 10mm, the progressive distance is 5mm, and the thickness of the surfacing layer is 2 mm.
2. The method of making a modified Inconel625 hardfacing coating of claim 1, wherein: y is2O3Is 0.5 wt%, and the Al powder is 20 wt%.
3. The method of making a modified Inconel625 hardfacing coating of claim 1, wherein: the granularity of the aluminum powder is 200 meshes.
4. The method of making a modified Inconel625 hardfacing coating of claim 1, wherein: the base material is a Q235 plate with the thickness of 12 mm.
CN202010112550.8A 2020-02-24 2020-02-24 Preparation method of modified Inconel625 powder surfacing coating Active CN111250900B (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN112157370A (en) * 2020-08-28 2021-01-01 中国石油天然气股份有限公司 Nickel-based alloy powder for remanufacturing sealing surface of liquid inlet and outlet valve of water injection pump in oil field and method thereof
CN113237821A (en) * 2021-04-26 2021-08-10 江西科技师范大学 Preparation and detection method of yttrium-doped Inconel625 alloy applied to oxidative high-temperature chlorine corrosion environment
CN115216721A (en) * 2022-07-20 2022-10-21 华能国际电力股份有限公司 Coating composition for turbine blade, coating and preparation method
CN115369287A (en) * 2022-07-21 2022-11-22 南昌大学 Preparation method of modified nickel-based superalloy IN625 coating applied to high-temperature atmospheric environment

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112157370A (en) * 2020-08-28 2021-01-01 中国石油天然气股份有限公司 Nickel-based alloy powder for remanufacturing sealing surface of liquid inlet and outlet valve of water injection pump in oil field and method thereof
CN112157370B (en) * 2020-08-28 2022-05-10 中国石油天然气股份有限公司 Nickel-based alloy powder for remanufacturing sealing surface of liquid inlet and outlet valve of water injection pump in oil field and method thereof
CN113237821A (en) * 2021-04-26 2021-08-10 江西科技师范大学 Preparation and detection method of yttrium-doped Inconel625 alloy applied to oxidative high-temperature chlorine corrosion environment
CN115216721A (en) * 2022-07-20 2022-10-21 华能国际电力股份有限公司 Coating composition for turbine blade, coating and preparation method
CN115369287A (en) * 2022-07-21 2022-11-22 南昌大学 Preparation method of modified nickel-based superalloy IN625 coating applied to high-temperature atmospheric environment

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