CN103088280A - Cored wire for preparing iron-based coating as well as preparation method and application thereof - Google Patents
Cored wire for preparing iron-based coating as well as preparation method and application thereof Download PDFInfo
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- CN103088280A CN103088280A CN2013100032192A CN201310003219A CN103088280A CN 103088280 A CN103088280 A CN 103088280A CN 2013100032192 A CN2013100032192 A CN 2013100032192A CN 201310003219 A CN201310003219 A CN 201310003219A CN 103088280 A CN103088280 A CN 103088280A
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Abstract
The invention provides a cored wire for preparing an iron-based coating as well as a preparation method and application thereof and belongs to the field of thermal spraying in material processing engineering. The flux composition comprises 15-35 at.% of Cr, 5-25 at.% of B, 5-25 at.% of Si, 2.5 to 5.5 at.% of C and the balance of Fe; a strip material for a sheath of the cored wire is a stainless steel band; and the filling rate of the cored wire is 33%. When electric-arc spraying is used for preparing an iron-based amorphous/nanocrystal coating containing ceramic phase SiO2, firstly a matrix is pretreated, and according to a spraying technology, the voltage is 28-34V, the electric current is 160-220A, the spraying distance is 190-210mm, and the compressed air pressure is 0.4-0.6Mpa. The coating can be widely applied to repair and protection of equipment parts in industries such as metallurgy, electricity and petroleum. The coating with the advantages of corrosion resistance, high hardness and high wearing resistance is obtained according to the preparation method.
Description
Technical field
The invention belongs to the field of thermal spray in Materials Processing Engineering, relate to preparation method and the application of a kind of powder cored filament material, coating, particularly contain ceramic phase SiO a kind of the preparation with arc spray process
2Fe-based amorphous/powder cored filament material of nanocrystalline coating, the preparation method of coating and application, this invention is main uses the industrial circles such as corrosion-resistant, wear-resisting.
Background technology
Corrosion and wearing and tearing are principal modes of material failure and mostly occur at material surface, and often there is mutual alternating action jointly in it in increasing actual condition, brings about great losses to national economy.Surface engineering technology is to improve the material surface performance, the effective way that extends the material military service life-span, and hot-spraying techniques is one of technology that is most widely used.At material surface deposited coatings or cermet coating, improve the performances such as it is corrosion-resistant, wear-resistant, resistance to high temperature oxidation by thermospray.Along with improving constantly of state of the art, the Service Environment of material is more and more abominable.For example, the boiler in thermal power generation " four pipes " should bear high temperature and corrosion of fume, bears again the erosive wear of dust flue gas.The turbine blade in power station bears wearing and tearing and the cavitation erosion of sandstone.Corrosion-resistant, the exploitation of abrasion-resistant coatings and the Main Trends of The Development that application becomes field of thermal spray research.
Stupalith is the thermal spraying material of the important high-temperature corrosion resistance of a class, oxidation and wearing and tearing.The compound coating that contains ceramic phase of thermospray preparation has good high-temperature oxidation and wear resistance, and especially erosion resistance, can form the oxide film with provide protection, effectively alleviates fused salt corrosion.Amorphous alloy is because the arrangement of atoms metal is that Great Wall is unordered, crystal boundary, defective, segregation and the precipitate etc. that do not exist crystal metal to exist, this structures shape of amorphous alloy it have the excellent properties that many crystalline state metals do not have, high rigidity and wear resistance, the chemical uniformity that the while amorphous alloy has high density shows good erosion resistance.Take Fe-based amorphous/nanocrystalline as ceramic phase SiO
2To bring into play amorphous/nanocrystalline phase and ceramic phase advantage separately as the prepared cermet composite coating of support substrate, and improve material and reduce costs in active time in severe environment, obtain larger economic benefit in practical engineering application.
In numerous methods that prepare coating, hot-spraying techniques is a kind of very promising technology.The spraying coating process equipment such as plasma spraying, detonation flame spraying, hypersonic flame spraying are complicated, and cost is high, is not suitable for original position big area site operation, and the preparation of spraying starting material powder is complicated.When adopting overlaying method to carry out surfacecti proteon to superheater and water wall, protective layer occurs peeling off when high temperature and can not play effective provide protection.And electric arc spraying is because having that equipment is simple, easy to operate, spray material is easy to prepare, good economy performance, can realize the advantage such as original position large-area construction, has become to prepare corrosion-resistant and main preparation methods abrasion-resistant coatings in practical application area.
Through retrieval, there is no at present and adopt the electric arc spraying preparation to contain ceramic phase SiO
2Fe-based amorphous/patent report of nanocrystalline coating correlation technique.
Summary of the invention
The present invention is intended to obtain contain ceramic phase SiO a kind of the preparation with electric arc spraying
2Fe-based amorphous/powder cored filament material preparation method and the application (amorphous/nanocrystalline of the present invention refers to " wherein containing amorphous and nanocrystalline generation ") of nanocrystalline coating.Utilize Fe-based amorphous/nanocrystalline coating to possess good solidity to corrosion and wear resistance and ceramic phase SiO
2Form corrosion resistant protective layer and improve the wear-resisting skeleton of coating, strengthen the characteristics of wear resistance, obtaining to satisfy simultaneously corrosion-resistant, anti abrasive coating.Improve the stability that material is on active service in the bad working environments environment, for obtaining higher production efficiency and larger productive value creation possibility.
Contain ceramic phase SiO a kind of the preparation with electric arc spraying
2Fe-based amorphous/powder cored filament material of nanocrystalline coating, it is characterized in that: the drug core component atomic percent is: Cr:15-35at.%; B:5-25at.%; Si:5-25at.%; C:2.5-5.5at.%; Fe: surplus; Powder cored filament material crust band used is Stainless Steel Band; Powder cored filament material filling ratio: 33%.
Described powder cored filament material crust band used is Stainless Steel Band.
Preferred described powder cored filament material drug core component atomic percent is: Cr:20-35at.%; B:5-20at.%; Si:5-25at.%; C:2.5-5.5at.%; Fe: surplus.
Further preferred described powder cored filament material drug core component atomic percent is: Cr:25-30at.%; B:10-20at.%; Si:10-25at.%; C:3-5at.%; Fe: surplus.
Adopt the above-mentioned powder cored filament material of the present invention to prepare a kind of ceramic phase SiO that contains
2Fe-based amorphous/method of nanocrystalline coating, it is characterized in that, comprise the steps:
The described spraying coating process of step 3 is optimized, and spraying parameter is set as: voltage 30-32V; Electric current 180-200A; Spray distance: 190-210mm; Compressed air pressure: 0.5-0.6MPa, the preparation coating.
Adopt a kind of ceramic phase SiO that contains of aforesaid method preparation
2Fe-based amorphous/nanocrystalline coating; With this coatings applications in the operating mode that exists corrosion and wearing and tearing to exist, as its alternative 45CT being applied on boiler " four pipes ".
A kind of ceramic phase SiO that contains of the method for the invention preparation
2Fe-based amorphous/nanocrystalline coating has the good performance such as corrosion-resistant, wear-resistant, anti-oxidant.The effectively corrosion of opposing salt, form SiO under the environment of high temperature
2Protective layer stops that corrosive medium is to the corrosion of matrix.Coating contains hardness and the relative wear resistance that a large amount of amorphous/nanocrystallines improves coating mutually significantly, extend matrix work-ing life, and the iron-based coating cost is low, good economy performance, can be widely used in the industries such as metallurgy, electric power, oil equipment part reparation and the protection on.
A kind of ceramic phase SiO that contains of the method for the invention preparation
2Fe-based amorphous/heat/corrosion resistance, wear resistance that nanocrystalline coating has are that himself component determines.It act as:
Fe, Cr element: the oxide compound formation speed of Fe element is faster than Cr element, and more than the Cr constituent content, is therefore forming Cr
2O
3Before oxide film, can generate a large amount of Fe
2O
3And FeCr
2O
4, reduced the oxygen partial pressure of oxide film and alloy interface, promote the Cr in coating to form the Cr of the continuous densification with good corrosion resistance
2O
3Oxide film is followed the formed spinel type compound F 17-hydroxy-corticosterone of Fe element eCr
2O
4, coating is played a protective role.
B element: promote the coating amorphous/nanocrystalline to form ability, reduce the Grain Boundary Chemistry energy, strengthen the oxide compound in intercrystalline bonding force, crystal grain thinning, minimizing coating.
Si element: form ceramic phase SiO in coating
2, play supercoat, prevent from the effect of corroding from as organizing wild phase, improving the wear-resisting skeleton of coating, improve coating hardness, strengthen coating abrasion performance.
Although each element in coating is all conventional element, the wear resistance and corrosion resistance of coating is that the synergy by each element determines, is not that single-element determines, neither only test just available by limited number of time.
The present invention is to provide a kind of electric arc spraying preparation and contains ceramic phase SiO
2Fe-based amorphous/powder cored filament material and coating production that nanocrystalline coating is used.This powder cored filament material after material surface prepares coating, contains ceramic phase SiO through electric arc spraying in coating
2Wild phase, the content of amorphous phase are 10 ~ 30%, obtain anti-corrosion good, hardness is high, wear resistance is good coating.Improve military service stability perishable, worn parts.
Description of drawings
Fig. 1 embodiment 1-13 coating microhardness Changing Pattern;
Fig. 2 embodiment 1-13 coating relative wear resistance Changing Pattern;
The matched curve that Fig. 3 embodiment 13 coating XRD analysis collection of illustrative plates and content of amorphous are measured, 1 is matched curve, 2 is baseline;
Fig. 4 embodiment 5,8,11,13 coating corrosion with salt coating empirical curves;
Fig. 5 embodiment 13 coatingsurface SEM figure, 3 is ceramic phase SO
2
Embodiment
Further illustrate substantive distinguishing features of the present invention and remarkable advantage below by embodiment, the present invention only is confined to by no means the embodiment that states.
In each embodiment, same section is as described below:
In embodiment the powder cored filament material crust to select specification be that 12 * 0.3mm(width is 12mm, thickness is 0.3mm) Stainless Steel Band, the powder cored filament material drug core component illustrates in an embodiment, by existing powder cored filament material rolling technique, the powder cored filament material warp is pursued road drawing tube reducing to 2.0mm; Matrix select Q235 (20 * 15 * 5mm, 57 * 25 * 5mm) and adopt the Q235 steel according to the prepared tension specimen rod of the sample dimensions of defined in ASTM C633-79 (again checking and approving in 1993) after granularity is 180 order sand paper pre-grinding, adopting granularity is 40-60 order palm fibre corundum, gaseous tension 0.4-0.6MPa, time length 10s/ spray-coating surface technique is carried out the sandblast roughening treatment to test specimen; 3. spraying parameter illustrates in an embodiment, and abrasive wear, solidity to corrosion experiment are no more than 50 μ m with the each coating thickness of coating, spray to several times 450 μ m; In same embodiment, identical with abrasive wear, solidity to corrosion experiment preparation technology of coating parameter, each coating thickness is no more than 50 μ m to bonding strength test, sprays to several times 250 μ m with coating.
According to powder cored filament material drug core component atomic percent be: Cr:15at.%; B:5at.%; Si:5at.%; C:2.5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 28-30V; Electric current 160-180A; Spray distance 190mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:15at.%; B:5at.%; Si:5at.%; C:2.5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 30-32V; Electric current 180-200A; Spray distance 210mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:15at.%; B:5at.%; Si:5at.%; C:2.5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 32-34V; Electric current 200-220A; Spray distance 200mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:20at.%; B:9at.%; Si:10at.%; C:3at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 28-30V; Electric current 160-180A; Spray distance 190mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:20at.%; B:9at.%; Si:10at.%; C:3at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 30-32V; Electric current 180-200A; Spray distance 210mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:20at.%; B:9at.%; Si:10at.%; C:3at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 32-34V; Electric current 200-220A; Spray distance 200mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:25at.%; B:15at.%; Si:15at.%; C:5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 28-30V; Electric current 160-180A; Spray distance 190mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:25at.%; B:15at.%; Si:15at.%; C:5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 30-32V; Electric current 180-200A; Spray distance 210mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:25at.%; B:15at.%; Si:15at.%; C:5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 32-34V; Electric current 200-220A; Spray distance 200mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:35at.%; B:20at.%; Si:25at.%; C:5.5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 28-30V; Electric current 160-180A; Spray distance 190mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:35at.%; B:20at.%; Si:25at.%; C:5.5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 30-32V; Electric current 180-200A; Spray distance 210mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:35at.%; B:20at.%; Si:25at.%; C:5.5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 32-34V; Electric current 200-220A; Spray distance 200mm; Compressed air pressure 0.4-0.5MPa.
According to powder cored filament material drug core component atomic percent be: Cr:26.5at.%; B:25at.%; Si:20at.%; C:3.5at.%; Fe: surplus.Filling ratio: 33%, rolling powder cored filament material.Preparation coating spray parameters used: voltage 30-32V; Electric current 180-200A; Spray distance 200mm; Compressed air pressure 0.4-0.5MPa.
The prepared coating performance of each embodiment detects as described below:
1. the prepared coating of embodiment carries out adopting the digital microhardness tester of HXD-1000 in the micro-hardness testing test, load 100g, and time length 15s gets 10 microhardness mean values.
2. the prepared coating of embodiment being carried out content of amorphous measures, there is the bag of dispersing of broadening comparatively in collection of illustrative plates 45 ° of left and right, contain amorphous phase in the coating of proof preparation thus, by the Verdon method, the result of each embodiment XRD diffraction experiment is carried out the Pseudo-Voigt Function Fitting, calculate that in coating, content of amorphous sees Table 2.
3. nanocrystalline grain fineness number in embodiment is measured and adopted X-ray diffraction halfwidth method of calculation, namely Scherrer (Scherrer) formula commonly used calculates the grain-size of main peak Fe-Cr phase in collection of illustrative plates, the results are shown in Table 2, show be exist in embodiment a certain amount of nanocrystalline.
4. the prepared coating of embodiment is carried out wear-resistant experiment, adopt the wheeled grain-abrasion testing machine of MLS-225 type damp sand rubber to carry out.Test parameter is as follows: rubber wheel rotating speed: 240r/min, rubber wheel diameter: 178mm, rubber wheel hardness: 60 (continue you hardness), load 100N, rubber wheel revolution: pre-grinding 1000 turns, finish grindes and 2000 turns, abrasive material: granularity 40-70 order quartz sand.The material wear-resistant performance is weighed with the weight loss of wearing and tearing.Forward and backward in experiment, to put into the beaker that fills acetone soln the time, clean 3-5 minute in ultrasonic washing instrument, use Q235 steel sample as a comparison in experiment, the relative wear resistance that is compared to this formula of contrast piece weight loss and measuring piece weight loss the results are shown in Figure 2.
5. the prepared coating of embodiment is carried out the heat and corrosion resistant experiment, only choose coating as sample, control sample is selected the Q235 structural section, specification: 20 * 15 * 5mm; After all samples are carried out 250 ℃/20min preheating, utilize Na
2SO
4+ K
2SO
4Mixing salt (mol ratio is 7:3) soaks, and takes out by 120 ℃/2h to be used for the oven dry residual moisture, is coated with salt amount: 3-5mg/cm
2, carry out corrosion with salt coating experiment in 650 ℃ of air furnaces, take out after every 10h, be placed in air and weigh after cooling, after the 200h round-robin test, choose embodiment 5,8,11,13 coating corrosion with salt coating curves, see Fig. 4.
6. the prepared coating of embodiment is carried out the bonding strength test, standard is described carries out according to ASTM C633-79 (again checking and approving in 1993), caking agent is selected SHANGHAI RESEARCH INSTITUTE OF SYNTHETIC RESINS made E-7 type thermal structure glue, the colloid proportioning provides according to specification sheets, and carry out the bonding strength test after 100 ℃/3h solidifies, see Table 1.
7. the prepared coating of embodiment is carried out analysis of porosity, adopt Image Pro Plus6.0 image analysis software, utilize image method to analyze coating porosity, to estimate the coating density.Respectively five cross section metallographs of each embodiment manufactured coating calculated, and got its mean value, see Table 1.
by considering embodiment 1-13 coating porosity, bonding strength, microhardness, relative wear resistance and erosion resistance, embodiment 1-13 coating microhardness Changing Pattern is seen Fig. 1, embodiment 1-13 coating relative wear resistance Changing Pattern is seen Fig. 2, embodiment 5, 8, 11, 13 coating corrosion with salt coating empirical curves are seen Fig. 4, the powder cored filament material drug core component is progressively optimized, final acquisition solidity to corrosion is good, the coating that wear resistance is good, be applied to boiler " four pipes ", metallurgical, electric power, in the reparation of the equipment part of the industries such as oil and protection, be on active service stable to improve above-mentioned parts, increase operation rate and running efficiency.
Table 1 embodiment 1-13 porosity and bonding strength
Table 2 embodiment 1-13 content of amorphous and the nanocrystalline grain-size of main peak
Claims (7)
1. one kind prepares the powder cored filament material that iron-based coating is used, and it is characterized in that, is to contain ceramic phase SiO with the electric arc spraying preparation
2Fe-based amorphous/powder cored filament material of nanocrystalline composite coating, the flux-cored wire that spray material is comprised of coating and medicine core, drug core component per-cent is: Cr:15-35at.%; B:5-25at.%; Si:5-25at.%; C:2.5-5.5at.%; Fe: surplus; Powder cored filament material crust band used is Stainless Steel Band; Powder cored filament material filling ratio: 33%.
2. according to a kind of powder cored filament material of claim 1, it is characterized in that, drug core component per-cent is: Cr:20-35at.%; B:5-20at.%; Si:5-25at.%; C:2.5-5.5at.%; Fe: surplus.
3. according to a kind of powder cored filament material of claim 1, it is characterized in that: drug core component per-cent is: Cr:25-30at.%; B:10-20at.%; Si:10-25at.%; C:2.5-5.5at.%; The Fe surplus.
4. one kind is adopted arbitrary powder cored filament material preparation of claim 1-3 to contain ceramic phase SiO
2Fe-based amorphous/method of nanocrystalline composite coating, it is characterized in that, comprise the steps:
Step 1, matrix surface is carried out pre-treatment: matrix surface is after granularity 180 order sand paper pre-grinding, and utilizing granularity is 60 order palm fibre corundum, air pressure 0.4-0.6MPa, sand-blasting gun slew rate degree 5mm/s carries out matrix surface sandblast alligatoring;
Step 2, powder cored filament material is rolling, finally obtain the powder cored filament material that diameter is 2.0mm;
Step 3 adopts electric arc spraying process to prepare coating, and spraying parameter is: voltage 28-34V; Electric current 160-220A; Spray distance: 190-210mm; Compressed air pressure: 0.4-0.6MPa.
5. according to the method for claim 4, it is characterized in that, the described spraying parameter of step 3 is set as: voltage 30-32V; Electric current 180-200A; Spray distance: 210mm; Compressed air pressure: 0.5-0.6MPa.
6. adopt the prepared a kind of ceramic phase SiO that contains of method of claim 4
2Iron-based amorphous nanocrystalline composite coating, it is characterized in that: in prepared coating, the content of amorphous phase is 10 ~ 30%.
7. a kind of coatings applications of claim 7 is in corrosion-resistant, anti abrasive each industrial circle.
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Cited By (8)
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| CN103422045A (en) * | 2013-07-15 | 2013-12-04 | 江西省电力设备总厂 | Novel amorphous state hard surface alloy drug core wire material |
| CN103695833A (en) * | 2014-01-07 | 2014-04-02 | 苏州热工研究院有限公司 | Material of wear-resistant anticorrosive coating for sludge incinerator, coating as well as method for preparing coating |
| CN104028743A (en) * | 2014-05-28 | 2014-09-10 | 河海大学 | Ferrochromium-based powder core wire and preparing method and application thereof |
| CN104789916A (en) * | 2015-04-21 | 2015-07-22 | 苏州统明机械有限公司 | Oxidation-resistant ferrous alloy coating for thermal spraying and preparation method thereof |
| CN104947025A (en) * | 2014-03-26 | 2015-09-30 | 北京永聚河环保投资有限公司 | Preparation of anticorrosive wear-resistant amorphous/nanocrystal composite coating |
| CN105063546A (en) * | 2015-09-09 | 2015-11-18 | 科盾工业设备制造（天津）有限公司 | Method for thermally spraying amorphous alloy coating on heating surface in boiler |
| CN108330425A (en) * | 2018-05-07 | 2018-07-27 | 戴亚洲 | A kind of Ultrasonic Arc Sprayed Fe-based self-fluxing alloy amorphous coating method |
| CN110129715A (en) * | 2019-05-14 | 2019-08-16 | 昆明理工大学 | A kind of in-situ nano metal-ceramic composite coatings and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422045A (en) * | 2013-07-15 | 2013-12-04 | 江西省电力设备总厂 | Novel amorphous state hard surface alloy drug core wire material |
| CN103695833A (en) * | 2014-01-07 | 2014-04-02 | 苏州热工研究院有限公司 | Material of wear-resistant anticorrosive coating for sludge incinerator, coating as well as method for preparing coating |
| CN104947025A (en) * | 2014-03-26 | 2015-09-30 | 北京永聚河环保投资有限公司 | Preparation of anticorrosive wear-resistant amorphous/nanocrystal composite coating |
| CN104028743A (en) * | 2014-05-28 | 2014-09-10 | 河海大学 | Ferrochromium-based powder core wire and preparing method and application thereof |
| CN104789916A (en) * | 2015-04-21 | 2015-07-22 | 苏州统明机械有限公司 | Oxidation-resistant ferrous alloy coating for thermal spraying and preparation method thereof |
| CN105063546A (en) * | 2015-09-09 | 2015-11-18 | 科盾工业设备制造（天津）有限公司 | Method for thermally spraying amorphous alloy coating on heating surface in boiler |
| CN108330425A (en) * | 2018-05-07 | 2018-07-27 | 戴亚洲 | A kind of Ultrasonic Arc Sprayed Fe-based self-fluxing alloy amorphous coating method |
| CN110129715A (en) * | 2019-05-14 | 2019-08-16 | 昆明理工大学 | A kind of in-situ nano metal-ceramic composite coatings and preparation method thereof |
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