CN109468573A - A method of preparing the wear-resistant coating of soldering transition zone using electric arc spraying - Google Patents

A method of preparing the wear-resistant coating of soldering transition zone using electric arc spraying Download PDF

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Publication number
CN109468573A
CN109468573A CN201811615447.4A CN201811615447A CN109468573A CN 109468573 A CN109468573 A CN 109468573A CN 201811615447 A CN201811615447 A CN 201811615447A CN 109468573 A CN109468573 A CN 109468573A
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wear
transition zone
resistant coating
electric arc
soldering
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CN109468573B (en
Inventor
张楠楠
马永亮
张悦
木瑞洁
张欣宇
王琳
谭涛
王凤振
汪远朋
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Shenyang University of Technology
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Shenyang University of Technology
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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
    • C23C4/131—Wire arc 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
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • C23C4/08—Metallic material containing only metal elements
    • 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
    • C23C4/18—After-treatment

Abstract

The present invention relates to soldering tech fields, and more particularly to a kind of method of wear-resistant coating for preparing soldering transition zone using electric arc spraying, (1) uses the surface degreasing of NaOH alkali wash water；(2) blasting treatment is carried out to the piece surface to degrease using Brown Alundum abrasive grain；(3) electric arc spraying obtains soldering transition zone workpiece: (4) carry out electric arc spraying to soldering transition zone workpiece again and obtain wear-resistant coating workpiece；(5) workpiece is heat-treated at 900 DEG C 5min it is air-cooled after must be brazed the wear-resistant coating of transition zone.Brazing layer prepared by the present invention keeps matrix preferable in conjunction with wear-resistant coating working lining, and brazing layer can reach metallurgical bonding with matrix and wear-resistant coating working lining, and for spray-on coating, the soldering layer tissue after heating is more fine and close.

Description

A method of preparing the wear-resistant coating of soldering transition zone using electric arc spraying
Technical field
The present invention relates to soldering tech fields, prepare the wear-resisting of soldering transition zone using electric arc spraying more particularly to a kind of The method of coating.
Background technique
Soldering, refers to solder and the weldment lower than weldment fusing point while heated to utilizing liquid pricker after brazing filler metal melts temperature The welding method that the gap of material filling solid workpieces connects metal.Brazing deformation is small, connector smooth and beautiful appearance, is suitable for welding essence Component that is close, complicated and being made of different materials, such as honeycomb panel, turbine blade, hard alloy cutter and printed circuit board Deng.Careful processing and stringent cleaning must be carried out to workpiece before soldering, except degreasing and blocked up oxidation film, guarantee interface assembly Gap, gap generally require between 0.01~0.1mm.
Alloy coat is prepared in to play the role of certain protection on metallic matrix wear-resisting in present Surface Engineering, at For a kind of trend, there is very big application prospect in the industrial production.But the combination of alloy coat and matrix is often mechanical bond, It forms metallurgical bonding and needs the re melting process of flame or high energy beam current then to reach.
Summary of the invention
Electric arc spraying preparation soldering transition zone is utilized it is an object of the present invention to overcome the above-mentioned technical problems, and to provide a kind of Wear-resistant coating method, arc spray process is combined with soldering, i.e., it is rapidly and efficiently easy-operating using electric arc spraying Advantage shortening prepares the time of brazing layer, while making brazing layer connection matrix and wear-resistant coating working lining by way of heating, Achieve the purpose that metallurgical bonding.
The technical solution for solving above-mentioned technical problem is as follows:
A kind of method that the present invention devises wear-resistant coating that soldering transition zone is prepared using electric arc spraying, including following step It is rapid:
(1) surface degreasing:
Under the precondition for not changing part size, the greasy dirt of piece surface is preliminarily sprayed using the removal of NaOH alkali wash water；
(2) sandblasting is roughened:
Blasting treatment is carried out to the piece surface to degrease using the Brown Alundum abrasive grain of 180~200 mesh, sandblasting angle is 80 °~90 °, the pressure for the compressed air that sandblasting uses is 0.6~0.7MPa, and sandblasting distance is 100~150mm, until part After silvery white metallic luster occurs in surface, surface is blown off using compressed air and glues the glutinous grains of sand, the piece surface after guaranteeing sandblasting Roughness Ra is 3.0~3.5 μm；
(3) electric arc spraying obtains soldering transition zone workpiece:
It is the Ni of 1.6mm with diameter40Cu6099~99.7% Ti silk material that silk material and diameter are 2.0mm is former as spraying Material, mass ratio 1:1；Step (2) are completed into the part after sandblasting and carry out electric arc spraying；The distance of spraying be 100~ 150mm, wire feed rate be 3~4m/min, electric current I=160~190A, voltage U=30~35V, compressed gas 0.65~ 0.75MPa, flow are 1.6~2.0m3/ min, spray time are 1~3min, and coating layer thickness is 100~150 μm；Pass through change Diameter is the Ni of 1.6mm40Cu60The quality proportioning for 99~99.7% Ti silk material that silk material and diameter are 2.0mm, needed for acquisition The brazing layer of ingredient.
(4) electric arc spraying is carried out to the resulting soldering transition zone workpiece of step (3) again and obtains wear-resistant coating workpiece:
With diameter for 2.0mm Fe-Cr silk for raw material, spray distance be 100~150mm, 3~4m/ of wire feed rate Min, electric current I=160~190A, voltage U=30~35V, 0.65~0.75MPa of compressed gas, flow are 1.6~2.0m3/ Min, spray time are 1~3min, and coating layer thickness is 200~300 μm；Obtain the wear-resistant coating workpiece of soldering transition zone；Diameter For the mass ratio of the Fe-Cr silk of 2.0mm are as follows: 65~75% Fe, 25~35% Cr.Preferably, further include 1~3% Si. In wear-resistant coating workpiece surface one layer of 30~50 μm of pure Al coating of electric arc spraying again of soldering transition zone, guarantor when to be heat-treated It is not oxidized to protect working lining, spray distance is 100~150mm, 3~4m/min of wire feed rate, electric current I=160~190A, voltage U=30~35V, 0.65~0.75MPa of compressed gas, flow are 1.6~2.0m3/ min, spray time are 1~3min, coating With a thickness of 200~300 μm.
(5) it is heat-treated:
Resistance furnace is heated to 900 DEG C, the wear-resistant coating workpiece for the soldering transition zone that step (4) obtains then is put into electricity Hinder 5min in furnace, by being heated in resistance furnace so that the brazing layer after spraying melts, then as transition zone by part base solid and Wear-resistant coating workpiece forms preferable metallurgical bonding.The air-cooled wear-resistant coating to get soldering transition zone after taking-up.
The beneficial effects of the present invention are:
Mentality of designing of the present invention is novel, and arc spray process is combined with soldering, that is, utilizes the quick height of electric arc spraying The time that easy-operating advantage shortening prepares brazing layer is imitated, while making brazing layer connection matrix and wear-resisting painting by way of heating Layer working lining, achievees the purpose that metallurgical bonding.Brazing layer prepared by the present invention keeps matrix preferable in conjunction with wear-resistant coating working lining, Being brazed transition region thickness is 100~150 μm, and wear-resistant coating working lining thickness is at 100~200 μm.Brazing layer can be with matrix and resistance to Mill coating duty layer reaches metallurgical bonding, and for spray-on coating, the soldering layer tissue after heating is more fine and close.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is that brazing layer cross section of the product of the present invention respectively under 100 times, 200 times, 500 times of electron microscope is micro- See pattern；Wherein, a) 150 times of coating morphologies, b) 200 times of coating morphologies, c) d) 500 times of different zones coating morphologies；
Fig. 2 is the d) energy spectrum analysis of picture in Fig. 1；
Fig. 3 is the product cross section overall picture after heating；
Fig. 4 is the firmness change of heating front and back wear-resistant coating and soldering transition zone；
Fig. 5 is the coating morphology being heat-treated after anteroposterior diameter friction-wear test, a) before for spraying sample heat treatment, b) It is spraying sample after 900 DEG C of heat treatment 5min.
Specific embodiment
Embodiment 1:
(1) surface degreasing:
Under the precondition for not changing part size, the greasy dirt of piece surface is preliminarily sprayed using the removal of NaOH alkali wash water；
(2) sandblasting is roughened:
Blasting treatment is carried out to the piece surface to degrease using the Brown Alundum abrasive grain of 180 mesh, sandblasting angle is 80 °, The pressure for the compressed air that sandblasting uses is 0.6MPa, and sandblasting distance is 100mm, until silvery white non-ferrous metal light occurs in piece surface Behind pool, surface being blown off using compressed air and glues the glutinous grains of sand, the Part Surface Roughness Ra after guaranteeing sandblasting is 3.0~3.5 μm；
(3) electric arc spraying obtains soldering transition zone workpiece:
It is the Ni of 1.6mm with diameter40Cu6099~99.7% Ti silk material that silk material and diameter are 2.0mm is former as spraying Material, mass ratio 1:1；Step (2) are completed into the part after sandblasting and carry out electric arc spraying；The distance of spraying is 100mm, wire feed Speed is 3m/min, electric current I=160A, voltage U=30V, compressed gas 0.65MPa, flow 1.6m3/ min, spray time For 1min, coating layer thickness is 100 μm.
(4) electric arc spraying is carried out to the resulting soldering transition zone workpiece of step (3) again and obtains wear-resistant coating workpiece:
With diameter for 2.0mm Fe-Cr silk for raw material, spray distance 100mm, wire feed rate 3m/min, electric current I= 160A, voltage U=30V, compressed gas 0.65MPa, flow 1.6m3/ min, spray time 1min, coating layer thickness are 200 μ m；Obtain the wear-resistant coating workpiece of soldering transition zone；Diameter is the mass ratio of the Fe-Cr silk of 2.0mm are as follows: 65% Fe, 35% Cr.In wear-resistant coating workpiece surface one layer of 30 μm of pure Al coating of electric arc spraying again of soldering transition zone, guarantor when to be heat-treated It is not oxidized to protect working lining, spray distance 100mm, wire feed rate 3m/min, electric current I=160A, voltage U=30V, compressed gas Body 0.65MPa, flow 1.6m3/ min, spray time 1min, coating layer thickness are 200 μm.
(5) it is heat-treated:
Resistance furnace is heated to 900 DEG C, the wear-resistant coating workpiece for the soldering transition zone that step (4) obtains then is put into electricity Hinder 5min in furnace, by being heated in resistance furnace so that the brazing layer after spraying melts, then as transition zone by part base solid and Wear-resistant coating workpiece forms preferable metallurgical bonding.The air-cooled wear-resistant coating to get soldering transition zone after taking-up.
Embodiment 2:
(1) surface degreasing:
Under the precondition for not changing part size, the greasy dirt of piece surface is preliminarily sprayed using the removal of NaOH alkali wash water；
(2) sandblasting is roughened:
Blasting treatment is carried out to the piece surface to degrease using the Brown Alundum abrasive grain of 200 mesh, sandblasting angle is 90 °, The pressure for the compressed air that sandblasting uses is 0.7MPa, and sandblasting distance is 150mm, until silvery white non-ferrous metal light occurs in piece surface Behind pool, surface being blown off using compressed air and glues the glutinous grains of sand, the Part Surface Roughness Ra after guaranteeing sandblasting is 3.0~3.5 μm；
(3) electric arc spraying obtains soldering transition zone workpiece:
It is the Ni of 1.6mm with diameter40Cu6099~99.7% Ti silk material that silk material and diameter are 2.0mm is former as spraying Material, mass ratio 1:1；Step (2) are completed into the part after sandblasting and carry out electric arc spraying；The distance of spraying is 150mm, wire feed Speed is 4m/min, electric current I=190A, voltage U=35V, compressed gas 0.75MPa, flow 2.0m3/ min, spray time For 3min, coating layer thickness is 150 μm.
(4) electric arc spraying is carried out to the resulting soldering transition zone workpiece of step (3) again and obtains wear-resistant coating workpiece:
With diameter for 2.0mm Fe-Cr silk for raw material, spray distance 150mm, wire feed rate 4m/min, electric current I= 190A, voltage U=35V, compressed gas 0.75MPa, flow 2.0m3/ min, spray time 3min, coating layer thickness are 300 μ m；Obtain the wear-resistant coating workpiece of soldering transition zone；Diameter is the mass ratio of the Fe-Cr silk of 2.0mm are as follows: 75% Fe, 25% Cr.In wear-resistant coating workpiece surface one layer of 50 μm of pure Al coating of electric arc spraying again of soldering transition zone, guarantor when to be heat-treated It is not oxidized to protect working lining, spray distance 150mm, wire feed rate 4m/min, electric current I=190A, voltage U=35V, compressed gas Body 0.75MPa, flow 2.0m3/ min, spray time 3min, coating layer thickness are 300 μm.
(5) it is heat-treated:
Resistance furnace is heated to 900 DEG C, the wear-resistant coating workpiece for the soldering transition zone that step (4) obtains then is put into electricity Hinder 5min in furnace, by being heated in resistance furnace so that the brazing layer after spraying melts, then as transition zone by part base solid and Wear-resistant coating workpiece forms preferable metallurgical bonding.The air-cooled wear-resistant coating to get soldering transition zone after taking-up.
Embodiment 3:
(1) surface degreasing:
Under the precondition for not changing part size, the greasy dirt of piece surface is preliminarily sprayed using the removal of NaOH alkali wash water；
(2) sandblasting is roughened:
Blasting treatment is carried out to the piece surface to degrease using the Brown Alundum abrasive grain of 180 mesh, sandblasting angle is 90 °, The pressure for the compressed air that sandblasting uses is 0.65MPa, and sandblasting distance is 120mm, until silvery white non-ferrous metal occurs in piece surface After gloss, surface being blown off using compressed air and glues the glutinous grains of sand, the Part Surface Roughness Ra after guaranteeing sandblasting is 3.0~3.5 μ m；
(3) electric arc spraying obtains soldering transition zone workpiece:
It is the Ni of 1.6mm with diameter40Cu6099~99.7% Ti silk material that silk material and diameter are 2.0mm is former as spraying Material, mass ratio 1:1；Step (2) are completed into the part after sandblasting and carry out electric arc spraying；The distance of spraying is 120mm, wire feed Speed is 3m/min, electric current I=180A, voltage U=35V, compressed gas 0.7MPa, flow 1.8m3/ min, spray time are 2min, coating layer thickness are 120 μm.
(4) electric arc spraying is carried out to the resulting soldering transition zone workpiece of step (3) again and obtains wear-resistant coating workpiece:
With diameter for 2.0mm Fe-Cr silk for raw material, spray distance 120mm, wire feed rate 3m/min, electric current I= 180A, voltage U=35V, compressed gas 0.70MPa, flow 1.8m3/ min, spray time 2min, coating layer thickness are 250 μ m；Obtain the wear-resistant coating workpiece of soldering transition zone；Diameter is the mass ratio of the Fe-Cr silk of 2.0mm are as follows: 70% Fe, 29% Cr.It further include 1% Si.In wear-resistant coating workpiece surface one layer of 40 μm of pure Al coating of electric arc spraying again of soldering transition zone, Protect working lining not oxidized when to be heat-treated, spray distance 120mm, wire feed rate 4m/min, electric current I=180A, electricity Press U=30V, compressed gas 0.70MPa, flow 1.8m3/ min, spray time 2min, coating layer thickness are 250 μm.
(5) it is heat-treated:
Resistance furnace is heated to 900 DEG C, the wear-resistant coating workpiece for the soldering transition zone that step (4) obtains then is put into electricity Hinder 5min in furnace, by being heated in resistance furnace so that the brazing layer after spraying melts, then as transition zone by part base solid and Wear-resistant coating workpiece forms preferable metallurgical bonding.The air-cooled wear-resistant coating to get soldering transition zone after taking-up.
Embodiment 4:
(1) surface degreasing:
Under the precondition for not changing part size, the greasy dirt of piece surface is preliminarily sprayed using the removal of NaOH alkali wash water；
(2) sandblasting is roughened:
Blasting treatment is carried out to the piece surface to degrease using the Brown Alundum abrasive grain of 200 mesh, sandblasting angle is 80 °, The pressure for the compressed air that sandblasting uses is 0.68MPa, and sandblasting distance is 140mm, until silvery white non-ferrous metal occurs in piece surface After gloss, surface being blown off using compressed air and glues the glutinous grains of sand, the Part Surface Roughness Ra after guaranteeing sandblasting is 3.0~3.5 μ m；
(3) electric arc spraying obtains soldering transition zone workpiece:
It is the Ni of 1.6mm with diameter40Cu6099~99.7% Ti silk material that silk material and diameter are 2.0mm is former as spraying Material, mass ratio 1:1；Step (2) are completed into the part after sandblasting and carry out electric arc spraying；The distance of spraying is 140mm, wire feed Speed is 3m/min, electric current I=170A, voltage U=30V, compressed gas 0.65MPa, flow 2.0m3/ min, spray time For 1min, coating layer thickness is 150 μm.
(4) electric arc spraying is carried out to the resulting soldering transition zone workpiece of step (3) again and obtains wear-resistant coating workpiece:
With diameter for 2.0mm Fe-Cr silk for raw material, spray distance 100mm, wire feed rate 3m/min, electric current I= 170A, voltage U=30V, compressed gas 0.65MPa, flow 2.0m3/ min, spray time 2min, coating layer thickness are 250 μ m；Obtain the wear-resistant coating workpiece of soldering transition zone；Diameter is the mass ratio of the Fe-Cr silk of 2.0mm are as follows: 70% Fe, 27% Cr.It further include 3% Si.In wear-resistant coating workpiece surface one layer of 40 μm of pure Al coating of electric arc spraying again of soldering transition zone, Protect working lining not oxidized when to be heat-treated, spray distance 140mm, wire feed rate 3m/min, electric current I=160A, electricity Press U=30V, compressed gas 0.65MPa, flow 1.6m3/ min, spray time 2min, coating layer thickness are 280 μm.
(5) it is heat-treated:
Resistance furnace is heated to 900 DEG C, the wear-resistant coating workpiece for the soldering transition zone that step (4) obtains then is put into electricity Hinder 5min in furnace, by being heated in resistance furnace so that the brazing layer after spraying melts, then as transition zone by part base solid and Wear-resistant coating workpiece forms preferable metallurgical bonding.The air-cooled wear-resistant coating to get soldering transition zone after taking-up.
As seen from Figure 1, in the case where 900 DEG C, heating 5min fusing soldering transition zone.C) and d) be in Fig. 1 coating not With the tissue topography of position, from wherein a), b) in it can be seen that the Al layer part of the black on upper layer completes centainly with FeCr layers Fusion, a large amount of holes when the combination being brazed between transition zone and matrix is also relative to spraying state are reduced.It is brazed transition The dissolution of itself element is more uniform in layer, and the combination of matrix and wear-resistant coating working lining can be made closer.
Fig. 2 illustrates the d) energy spectrum analysis of figure in Fig. 1, gets position ready on wear-resistant coating working lining white area.Under It can be seen that essential element is Fe, Cr herein in table 1, there are also a small amount of Si.
Table 1 is by being heat-treated 5min coating constituent content under the conditions of 900 DEG C
Element Wt% At%
SiK 02.40 04.57
CrK 27.60 28.39
FeK 70.00 67.04
Fig. 3 is the coatings cross-section overall picture after heating, and in conjunction with matrix preferably, interface void disappears brazing layer.
Fig. 4 is the firmness change of heating front and back wear-resistant coating working lining and soldering transition zone, through carrying out heat under the conditions of 900 DEG C The hardness of coating can be improved after processing, and the sample coatings hardness for handling 5min can reach 654.68HV.
Above embodiments 1-4, can be by changing the Ni that diameter is 1.6mm40Cu60Silk material and diameter are the 99 of 2.0mm The proportion of~99.7% Ti silk material, the brazing layer of ingredient needed for obtaining.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to According to any simple modification to the above embodiments in technical spirit of the invention, equivalent variations, guarantor of the invention is each fallen within Within the scope of shield.

Claims (6)

1. a kind of method for the wear-resistant coating for preparing soldering transition zone using electric arc spraying, which comprises the following steps:
(1) surface degreasing:
Under the precondition for not changing part size, the greasy dirt of piece surface is preliminarily sprayed using the removal of NaOH alkali wash water；
(2) sandblasting is roughened:
Blasting treatment is carried out to the piece surface to degrease using Brown Alundum abrasive grain, sandblasting angle is 80 °~90 °, and sandblasting makes The pressure of compressed air is 0.6~0.7MPa, and sandblasting distance is 100~150mm, until silvery white coloured gold occurs in piece surface After belonging to gloss, surface is blown off using compressed air and glues the glutinous grains of sand, the Part Surface Roughness Ra after guaranteeing sandblasting is 3.0~ 3.5μm；
(3) electric arc spraying obtains soldering transition zone workpiece:
It is the Ni of 1.6mm with diameter40Cu6099~99.7% Ti silk material that silk material and diameter are 2.0mm is used as spraying raw material, Step (2) are completed into the part after sandblasting and carry out electric arc spraying；The distance of spraying is 100~150mm, and wire feed rate is 3~4m/ Min, electric current I=160~190A, voltage U=30~35V, 0.65~0.75MPa of compressed gas, flow are 1.6~2.0m3/ Min, spray time are 1~3min, and coating layer thickness is 100~150 μm；
(4) electric arc spraying is carried out to the resulting soldering transition zone workpiece of step (3) again and obtains wear-resistant coating workpiece:
With diameter for 2.0mm Fe-Cr silk for raw material, spray distance be 100~150mm, 3~4m/min of wire feed rate, electricity I=160~190A, voltage U=30~35V, 0.65~0.75MPa of compressed gas are flowed, flow is 1.6~2.0m3/ min, spraying Time is 1~3min, and coating layer thickness is 200~300 μm；Obtain the wear-resistant coating workpiece of soldering transition zone；
(5) it is heat-treated:
Resistance furnace is heated to 900 DEG C, the wear-resistant coating workpiece for the soldering transition zone that step (4) obtains then is put into resistance furnace Interior 5min, the air-cooled wear-resistant coating to get soldering transition zone after taking-up.
2. the method for the wear-resistant coating according to claim 1 for being prepared soldering transition zone using electric arc spraying, feature are existed In Brown Alundum abrasive grain described in step (2) is the Brown Alundum abrasive grain of 180~200 mesh.
3. the method for the wear-resistant coating according to claim 1 for being prepared soldering transition zone using electric arc spraying, feature are existed In diameter described in step (3) is the Ni of 1.6mm40Cu6099~99.7% Ti silk material matter that silk material and diameter are 2.0mm Amount is than being 1:1.
4. the method for the wear-resistant coating according to claim 1 for being prepared soldering transition zone using electric arc spraying, feature are existed In diameter described in step (4) is the mass ratio of the Fe-Cr silk of 2.0mm are as follows: 65~75% Fe, 25~35% Cr.
5. the method for the wear-resistant coating according to claim 4 for being prepared soldering transition zone using electric arc spraying, feature are existed In further including 1~3% Si.
6. the method for the wear-resistant coating according to claim 1 for being prepared soldering transition zone using electric arc spraying, feature are existed The wear-resistant coating workpiece surface of soldering transition zone one layer of 30~50 μm of pure Al coating of electric arc spraying again, spray are obtained in, step (4) Applying distance is 100~150mm, 3~4m/min of wire feed rate, electric current I=160~190A, voltage U=30~35V, compressed gas 0.65~0.75MPa, flow are 1.6~2.0m3/ min, spray time are 1~3min, and coating layer thickness is 200~300 μm.
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CN112871108A (en) * 2021-01-08 2021-06-01 浙江师范大学 Reaction kettle preparation method and reaction kettle

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CN112871108A (en) * 2021-01-08 2021-06-01 浙江师范大学 Reaction kettle preparation method and reaction kettle

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