CN104630769A - Active argon arc cladding Ni-based aluminum oxide-titanium diboride compound coating of coal ash and preparation method - Google Patents

Active argon arc cladding Ni-based aluminum oxide-titanium diboride compound coating of coal ash and preparation method Download PDF

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CN104630769A
CN104630769A CN201510044621.4A CN201510044621A CN104630769A CN 104630769 A CN104630769 A CN 104630769A CN 201510044621 A CN201510044621 A CN 201510044621A CN 104630769 A CN104630769 A CN 104630769A
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cladding
argon arc
preparation
cladding layer
ash
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CN104630769B (en
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董世知
马壮
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Liaoning Technical University
Liaoning Institute of Science and Technology
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Liaoning Technical University
Liaoning Institute of Science and 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
    • 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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  • Engineering & Computer Science (AREA)
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  • Organic Chemistry (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention discloses an active argon arc cladding Ni-based Al2O3-TiB2 compound coating of coal ash and a preparation method, and belongs to the technical field of tungsten inert gas tig welding. According to the invention, an A-TIG welding compound activating agent is prepared by taking high-alumina fly ash as a main raw material, and moreover, the compound activating agent is applied to an argon arc cladding process to prepare the active argon arc cladding Ni-based Al2O3-TiB2 compound coating on the surface of a Q235 steel matrix, so that the weld penetration is enlarged under an isosteric heat input condition, the surface hardness, wear resistance and corrosion resistance of the material are improved, and the service lives of mechanical parts are prolonged.

Description

Flyash activity Argon arc cladding Ni base aluminum oxide-TiB2 compound coating and preparation method thereof
Technical field
The invention belongs to Gas Tungsten Arc Welding technical field, be specifically related to a kind of flyash activity Argon arc cladding Ni base Al 2o 3-TiB 2compound coating and preparation method thereof.
Background technology
Activating-tungsten inert gas welding (being called for short A-TIG weldering) technology develops rapid, widely used welding technique in current welding profession both at home and abroad, this technology almost may be used for the welding of all metallic substance, and high-quality welding joint can be obtained, weld penetration can reach 2 ~ 3 times of conventional tungsten electrode argon arc welding.At present, A-TIG weldering is own through being widely used in the fields such as aerospace, petrochemical complex, mechanical boats and ships and communications and transportation.Active agent formulation and STUDY ON THE WELDING are the cores of A-TIG weldering; but both at home and abroad related research institutes mostly carries out patent protection to the composition of promoting agent and formula; open publication is seldom reported; this directly results in A-TIG, and to weld promoting agent price high, limits its application in fields such as aerospace, military affairs and mechanical heavy industrys to a certain extent.At present, conventional both at home and abroad surfactant material mainly contains SiO 2, B 2o 3, TiO 2, Cr 2o 3, NaCl, NaF and CaF 2deng material.And promoting agent raw material all adopts the commercially available chemical reagent of analytical pure rank, this improves the cost of A-TIG weldering to a certain extent.
Active Argon arc cladding refers to and is jointly melted under argon arc welding Source with certain addition manner and cladding material by promoting agent, obtains the coating production with certain property cladding layer on weldment surface.Excellent cladding means are expected to obtain the cladding layer that fusion penetration is shallow, metal dilution rate is little, so both can ensure that cladding layer had good binding ability, can utilize again the less cladding layer required for wlding acquisition.Therefore, traditional Argon arc cladding technology generally adopts the cladding method of " small area analysis, low voltage; thin layer repeatedly " to prepare cladding layer, but the method can cause cladding layer to be repeatedly heated, overheated tendency increases, and cladding layer inside produces serious crackle or peeling simultaneously.Therefore, ensureing that reducing overheated tendency under certain thinning ratio condition is the key solving this problem.
Activating flux weld technology can realize weld penetration under heat initial conditions and significantly increases waiting due to the introducing of promoting agent, molten widely slightly shrinks.In other words, waiting active Argon arc cladding under thinning ratio condition can reduce heat input, the overheated tendency of cladding layer is namely reduced.Meanwhile, active agent component design freely, also can utilize promoting agent and cladding material to react, and forms cenotype, also can have an impact to the structure and properties of cladding layer.It active Argon arc cladding technical spirit is also the further expansion of A-TIG technology.Active Argon arc cladding technical equipment is simple, mechanize and level of automation is high, welding cost is cheap, the technology that is easy to is popularized, be applicable to the surfacecti proteon of various material and complex-shaped mine mechanism and follow-up reparation, good one side welding with back formation function can be realized, there is very wide application prospect.
Argon arc cladding technology is also the one of surface cladding technology, workpiece surface is coated in some way by powdered alloy, under argon arc welding Source, electric arc ionization heating carrys out melt painting material, and then obtains the material surface modifying means with certain property cladding layer on weldment surface.Energy required for Argon arc cladding comes from the arc heat that gaseous media produces in discharge process, and its essence is the ionization of gaseous media.The heat of Argon arc cladding is concentrated, energy density between free electric arc and compression arc, rapid heating make local melting after be chilled to normal temperature with certain speed of cooling again.In A-TIG weldering process; argon gas covers electric arc and powdered alloy completely, make electric arc not by the impact of ambient air, and the nitrogen, oxygen etc. that avoid cladding material and surrounding reacts; decrease scaling loss and the oxidation of molten bath interalloy element, thus play a protective role.
At present, the correlative study abroad about the material such as titanium alloy and stainless steel Argon arc cladding ceramic particle reinforced metal base cladding layer is more.[the S Mridha such as S.Mridha, H S Ong, L S Poh, et al.Intermetallic coatings produced by TIG surface melting [J] .Jounal of Materials Processing Technology, 2001,113 (l): 516-520] adopt Argon arc cladding technology to prepare Ti-Al intermetallic compound cladding layer at titanium alloy surface, there is Ti cladding layer inside 3al and TiAl wild phase particles generation, do not have obvious pore and the defect such as to be mingled with, its microhardness can more than 500HV.[the Soner Buytoz such as Soner Buytoz, Mustafa Ulutan, M.Mustafa Yildirim.Dry sliding wear behavior of TIG welding clad WC composite coatings [J] .Applied Surface Science, 2005,252 (5): 1313-1323] Argon arc cladding WC coating has been prepared at AISI4340 stainless steel surface, its microhardness value is 950 ~ 1200HV, when productivity be 1.209mm/s, powder feeding rate is 0.5g/s, heat is input as 13.9kJ/cm time cladding layer mass loss minimum.And the domestic research about Argon arc cladding technology mainly concentrates on the strengthening of Cast Iron Surface argon arc remelting and surface of low-carbon steel prepares self-fluxing alloyed powder cladding layer.The choosing and be the research core of Argon arc cladding technology with the matching of welding base metal of cladding material (packing material).And the cladding body material of studies in China is mainly iron-based, cobalt-based and nickel base self-fluxing alloy powder, strongthener has carbide, boride, silicide, nitride etc.Strongthener is inner at cladding body material with hard particles form Dispersed precipitate, makes it have good wear resistance, solidity to corrosion and chemical stability.Therefore, the formation controlling enhanced granule is the key factor improving Argon Arc Cladding Layer performance.
Summary of the invention
The invention provides a kind of flyash activity Argon arc cladding Ni base Al 2o 3-TiB 2compound coating and preparation method thereof, aluminous fly-ash is that main raw material prepares the agent of A-TIG weldering composite reactive, meanwhile, composite reactive agent is applied to arc cladding technology, has prepared active Argon arc cladding Ni base Al on Q235 steel matrix surface 2o 3-TiB 2coating, realization increases weld penetration under waiting calorimetric initial conditions, and improves material surface hardness, wear-resisting and solidity to corrosion, improves the work-ing life of component of machine.
The composite reactive agent adopted in the present invention is main raw material with aluminous fly-ash, with SiO 2, B 2o 3, Ti and La 2o 3for auxiliary activity agent composition, composite reactive agent prescription:
At 60% aluminous fly-ash+15.76%SiO 2+ 8.88%B 2o 3on the basis of+15.36%Ti, extra interpolation mass percentage is 5%La 2o 3, fusion penetration is respectively 5.89mm and 7.85mm with molten wide, and depth-to-width ratio is 0.7503.
The present invention prepares Argon arc cladding Ni base Al 2o 3-TiB 2the cladding raw material of compound coating is chosen for:
At 60%Ni60A+16%Al 2o 3+ 24% (Al+TiO 2+ B 2o 3) basis on, then to add mass percentage be 5%Na 2b 4o 710H 2o, has prepared active Argon Arc Cladding Layer.In metallurgical binding between itself and matrix, interface flawless, pore and the defect such as to be mingled with.Hard phase in the active Argon Arc Cladding Layer prepared is with Al 2o 3, TiB 2and Fe 2b is main, also generates SiO in active cladding layer through reaction in－situ 2, Ni 3si and Fe 1.7al 4si phase.
Described flyash activity Argon arc cladding Ni base Al 2o 3-TiB 2the preparation method of compound coating comprises the steps:
The first step, the pre-treatment of body material;
Second step, applies the agent of one deck composite reactive at matrix surface;
3rd step, places cladding block on composite reactive agent surface;
4th step, argon arc welding obtains active cladding layer.
The invention has the advantages that:
(1) coal associated resources is adopted---aluminous fly-ash is that main raw material is prepared efficient and environment-friendly type A-TIG and welded promoting agent, and can realize efficient, economy and the environmental protection application of flyash, the high value added utilization for flyash opens new way and novel method.
(2) A-TIG is welded promoting agent and be applied to Argon arc cladding technology.Not only reduce the adding of promoting agent the heat input of Argon arc cladding, also impel the formation of a lot of cenotype, welding base metal heat affected zone and thermal distortion are reduced to minimum degree, improve welding efficiency and cost-saving.
(3) cladding enhanced granule be oxide compound, combine the double dominant of additional particle and in situ reaction system, not only reduce the cost of cladding layer, the complicated hard phase simultaneously generated can improve the hardness of component of machine, wear resistance and solidity to corrosion, for metallic substance anticorrosion antiwear opens new way.
Accompanying drawing explanation
Fig. 1 is the Cross Section Morphology of active cladding layer;
Fig. 2 is the XRD spectrum of active cladding layer;
Fig. 3 is matrix-active cladding layer zone of transition microstructure;
The SEM pattern of Fig. 4 active cladding layer top different amplification.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
The invention provides a kind of flyash activity Argon arc cladding Ni base Al 2o 3-TiB 2compound coating and preparation method thereof, described preparation method comprises the steps:
The first step, the pre-treatment of body material;
Test body material is Q235 steel, and its chemical composition (mass percentage) is as shown in table 1, is of a size of 100mm × 30mm × 8mm.By matrix angle grinding machine polishing, to remove iron rust and the oxide skin on surface, and adopt abrasive paper for metallograph to its fine processing, then use acetone and washes of absolute alcohol.
Chemical composition/the wt% (total amount is 100%) of table 1 Q235 steel
Second step, applies the agent of one deck composite reactive at matrix surface;
Adopt aluminous fly-ash to be main active agent raw material, add SiO wherein 2, B 2o 3, Ti and La 2o 3for auxiliary activity agent composition, obtaining composite reactive agent prescription is:
60% aluminous fly-ash+15.76%SiO 2+ 8.88%B 2o 3+ 15.36%Ti, on this basis, then to add mass percentage be 5%La 2o 3.
Al in described aluminous fly-ash 2o 3and SiO 2content up to more than 80wt%, each composition (mass percentage) contained in aluminous fly-ash as shown in table 2 (by Mineral resources supervisory detection center, Ministry of Land and Resources northeast measure).Containing a small amount of unburnt C in the flyash that power station directly discharges, before test, aluminous fly-ash is placed in SX2-8-10 type temperature type resistance furnace 800 DEG C insulation 2h and carries out carbonization treatment.
Chemical composition/the wt% (total content is 100%) of table 2 aluminous fly-ash
Composite reactive agent is placed in mortar fully grind, and crosses 200 mesh sieves, make granularity between 70 ~ 80 μm.Utilize FA1104N type electronic balance to weigh in proportion, take acetone as solvent, be prepared into suspension liquid, be coated in through pretreated Q235 steel matrix surface.Composite reactive agent coating thickness standard is advisable with complete covering metal surface luster; Then sample is placed in DHG-9076A type electric heating constant-temperature blowing drying box dry for standby.
3rd step, arranges cladding block on composite reactive agent surface;
Cladding material is with ni-based self-fluxing alloy Ni60A for matrix, and chemical composition is as shown in table 3, and its massfraction accounts for 50 ~ 70% of total mass respectively, and all the other are cladding powdered alloy.Cladding powdered alloy is by additional enhanced granule Al 2o 3with in situ reaction system Al-TiO 2-B 2o 3composition, the two ratio is respectively (1:4) ~ (4:1), when preferred Ni60A is 60%, Al 2o 3and Al-TiO 2-B 2o 3the mass ratio of system is 2:3, is namely 16% and 24% respectively.Borax, as a kind of low melting component, has the effect of dissolution of metals oxide compound, the effect of can play purification metal in welding process, fluxing, and therefore on above-mentioned formula basis, extra interpolation mass percentage is the borax of 5%.
Described in situ reaction system Al-TiO 2-B 2o 3, comprise analytically pure Al powder, analytically pure TiO 2powder and analytically pure B 2o 3powder, between three, mol ratio is 10:3:3.
Described cladding material is at 60%Ni60A+16%Al 2o 3+ 24% (Al+TiO 2+ B 2o 3) basis on, then to add mass percentage be 5% (Na 2b 4o 710H 2o), active Argon Arc Cladding Layer is prepared as raw material.
Chemical composition/the wt% (total content is 100%) of table 3 Ni60A
Cladding material blended evenly after according to the modulus adding 1mL ~ 10mL (preferred 4ml) in every 10g powder be 2.5 water glass (preferred sodium silicate), and stir immediately and make water glass uniform wet powdered alloy.Utilize WE-30 type universal testing machine to compress, on-load pressure is 50MPa ~ 100MPa, and preferred on-load pressure is 80MPa, preparation cladding block.Employing water glass is binding agent, cladding block is bonded at composite reactive agent surface, is placed on ventilation room temperature and dries in the shade 24h, then in drying baker 150 DEG C dry 2h.
The gauge of described cladding block is 1.5 ~ 2.0mm, and when on-load pressure is 80MPa, cladding block thickness is 1.8mm.
4th step, argon arc welding obtains active cladding layer.
Described argon arc welding technique parameter is: welding current l20A ~ 180A, welding speed 95 ~ 140mmmin -1, argon flow amount 5.0 ~ 9.5Lmin -1, arc length 1.0 ~ 4.0mm.Preferably, welding current 160A, welding cladding speed 110mm/min, argon flow amount 6.5Lmin -1, arc length 3.0mm, ceramic nozzle 8#, cerium tungsten electrode, tungsten electrode diameter 2mm, tungsten electrode wedge angle 60 °.
In metallurgical binding between described active cladding layer and matrix, interface flawless, pore and the defect such as to be mingled with.Hard phase in the active Argon Arc Cladding Layer prepared is with Al 2o 3, TiB 2and Fe 2b is main, also generates 3Al in active cladding layer through reaction in－situ 2o 32SiO 2, Ni 3si and Fe 1.7al 4si phase.
According to preparation method provided by the invention, cladding block pressing pressure chooses 80MPa, and cladding block is of a size of 1.8mm, and argon arc welding processing parameter is: by changing cladding powdered alloy composition proportion, as shown in table 4, and 5%Na is added again in this composition proportion basis 2b 4o 710H 2o, obtains a series of active cladding layer.
Table 4 cladding powdered alloy composition proportion (wt%)
Adopt same preparation method, do not adopt the composite reactive agent in second step, directly cladding block is bonded on matrix, obtain conventional cladding layer, carry out Experimental Comparison with active cladding layer of the present invention.
For M6 embodiment wherein, analyze the active cladding layer pattern obtained and weave construction, as shown in Figure 1, the fusion penetration of active cladding layer is respectively 5.25mm and 8.26mm with molten wide, and depth-to-width ratio is 0.64.
As shown in Figure 2, active cladding layer is interior with Al 2o 3and TiB 2content be main, generate Fe in addition 2b, 3Al 2o 32SiO 2, Ni 3si and Fe 1.7al 4si phase.
Fig. 3 is the pattern of matrix-active cladding layer zone of transition.The lower left corner is heat affected zone, and the upper right corner is active cladding layer microstructure morphology.As seen from Figure 3, active cladding layer is formed in zone of transition and is about 25 μm of thick Bai Liang interfaces, the columanar structure of active cladding layer inside along perpendicular to melt tank edge direction to center epitaxy, active cladding layer and basal body interface place pore-free and crackle, show to have good metallurgical binding between active cladding layer and matrix.Melt tank edge place elongate column crystalline substance is more tending towards tubbiness, also has part equiax crystal to grow along melt tank edge simultaneously.In addition, the non-metallic elements such as B, Si that active cladding layer is inner a large amount of have the effect of slag making, deoxidation in cladding process, are conducive to the generation avoiding slag inclusion and oxide impurity in cladding layer.
Fig. 4 is the high power SEM shape appearance figure of active cladding layer top tissue.The enhanced granule of active cladding layer inside is corynebacterium, and be evenly embedded in coat inside in almost parallel mode, spreadability is better.SEM observes discovery, and active Argon Arc Cladding Layer adds due to promoting agent, and in Argon arc cladding process, energy is more concentrated, cladding layer thermally equivalent, and particle fully melts and mobility is relatively better, and uniform spreading is inner at cladding layer.From cladding layer high power SEM shape appearance figure, the inner enhanced granule of active cladding layer then grows along vertical grain boundaries sides aligned parallel in fishbone shape, and crystal grain is fine uniform more.This concentrates due to promoting agent heat to cause fusion penetration to increase, and molten bath area increases, and heat is faster by base material conduction of velocity, and the rapid solidification of Argon arc cladding inhibits the growth of cladding layer internal grain, thus reaches homoepitaxial and the effect of crystal grain thinning.
The surperficial macrohardness value of active Argon Arc Cladding Layer is 64.9HRC, and relative matrix (Q235 steel 12.1HRC) improves 4.37 times.The microhardness of active cladding layer is between 781.7HV ~ 946.9HV, and the relative matrix of its highest microhardness (being about 160HV) improves 4.92 times.
As shown in table 5, different grain size shows the abrasive wear behavior testing data under mill material, and when being respectively 2#, 3# and 4# abrasive paper for metallograph to mill material, the relative wear grain polishing machine of active cladding layer is 7.05 ~ 10.69 times of matrix.
Table 5 abrasive grain wear test data
Along with abrasive wear is to the increase of mill material model, reduce the hard particles granularity of mill material surface distribution, the unit surface weight loss of matrix and cladding layer also reduces gradually.
15%H is selected in the test of acid corrosion-resistant performance 2sO 4solution is corrosive medium, after corrosion 21h, and acid corrosion-resistant performance (the weightless 6.0093*10 of unit surface of active cladding layer 2g/m 2) be matrix (the weightless 17.9315*10 of unit surface 2g/m 2) 2.98 times.
Alkali corrosion resistance performance test selects 10%NaOH solution to be corrosive medium, after corrosion 21h, and alkali corrosion resistance performance (the weightless 3.4902*10 of unit surface of active cladding layer 2g/m 2) be matrix (the weightless 13.7959*10 of unit surface 2g/m 2) 3.95 times, this illustrate cladding layer comparatively matrix there is better alkali corrosion resistance performance.。
Corrode 144h in sea water solution after, acid corrosion-resistant performance (the weightless 1.5305*10 of unit surface of normal active cladding layer 2g/m 2) be matrix (the weightless 6.3417*10 of unit surface 2g/m 2) 4.14 times.
After corroding 144h in oil medium solution, acid corrosion-resistant performance (the weightless 2.5777*10 of unit surface of active cladding layer 2g/m 2) be matrix (the weightless 14.2051*10 of unit surface 2g/m 2) 5.51 times.
Erosive wear concentration of medium (water constituents) is 5000:2800, and erosion angle is 90 °, and rotating speed is respectively 200r/min, 300r/min and 400r/min.The erosion-wear-resisting performance of the active cladding layer of erosive wear 300min is 4.81 ~ 5.04 times of matrix.Under same rotational speed condition, the erosive wear of matrix is the most serious, and the erosion-wear-resisting better performances of active cladding layer, see table 6.
Erosive wear data under table 6 different rotating speeds condition
Concentration of medium is also the important factor affecting material Erosive Properties, erosive wear rotating speed 300r/min, and erosion angle is 90 °, and concentration of medium (water constituents) is respectively 5000:1600,5000:2800 and 5000:4000.
See table 7, the erosion-wear-resisting performance of the active cladding layer of erosive wear 300min is 3.49 ~ 5.70 times of matrix.Under same media concentration conditions, the erosive wear of matrix is weightless far above active cladding layer.
Erosive wear data under table 7 different media concentration
Under different rotating speeds condition, the erosive wear weight loss of cladding layer in seawater+quartz sand medium is as shown in table 8.Known by calculating, after erosive wear 150min, the erosion-wear-resisting performance of active cladding layer is 4.40 ~ 5.59 times of matrix.The unit surface weight loss of matrix will far away higher than active cladding layer.Meanwhile, give the conventional cladding layer erosive wear data do not adopted under composite reactive agent condition in table 8, after erosive wear 150min, the erosion-wear-resisting performance of conventional cladding layer is 3.90 ~ 4.97 times of matrix.
Erosion wear data under table 8 different rotating speeds condition
In order to inquire into the impact of erosion medium on test further, matrix and the erosion resistance tests data of cladding layer in tap water-quartz sand and artificial seawater-quartz sand during this test statistics 120min, wherein test conditions is identical, erosion concentration is 5000:2800, erosion angle is 90 °, and rotating speed is respectively 200r/min, 300r/min and 400r/min.Under the test conditions of different rotating speeds 200r/min, 300r/min and 400r/min, the erosive wear amount of cladding layer in artificial seawater-quartz sand is all greater than the abrasion loss in tap water-quartz sand.
Under different rotating speeds condition, the erosive wear weight loss of cladding layer in oil medium+quartz sand is as shown in table 9.Known by calculating, after erosive wear 150min, the erosion-wear-resisting performance of active cladding layer is 5.60 ~ 6.11 times of matrix, and the erosion-wear-resisting performance of conventional cladding layer is 5.05 ~ 5.50 times of matrix.The Erosive Properties of cladding layer in oil medium is better than QQ35 steel matrix.
Table 9 cladding layer erosion resistance test result (200r/min)
Along with erosion medium rotating speed changes from 200r/min to 400r/min, the weight loss of matrix and cladding layer constantly increases.Under lower rotating speed, destroy comparatively light, therefore weightless less to the material plasticity that clad layer surface causes.Primary strengthening phase in cladding layer is Fe 2b, Al 2o 3, TiB 2deng hard particles; the generation of cenotype all creates considerable influence to cladding layer compound type and distribution, form; add the provide protection simultaneously between cenotype of cladding layer and substrate combinating strength also to increase, cladding layer erosive wear resistance also significantly improves at higher rotational speeds.Adopt flyash activity solder flux provided by the invention, with Q235 steel for matrix carries out A-TIG weldering, test-results shows, and fusion penetration is respectively 5.89mm and 7.85mm with molten wide, and depth-to-width ratio is 0.75, is about 4.3 times during non-activity agent.

Claims (8)

1. flyash activity Argon arc cladding Ni base Al 2o 3-TiB 2the preparation method of compound coating, is characterized in that: described preparation method comprises the steps:
The first step, the pre-treatment of body material;
Second step, applies the agent of one deck composite reactive at matrix surface;
Choose aluminous fly-ash, Al in described aluminous fly-ash 2o 3and SiO 2more than content 80wt%; Before using, aluminous fly-ash is carried out the carbonization treatment of 800 DEG C of insulation 2h; Then in the aluminous fly-ash after carbonization treatment, SiO is added 2, B 2o 3, Ti and La 2o 3, on this basis, then to add mass percentage be 5%La 2o 3;
Composite reactive agent is placed in mortar fully grind, and crosses 200 mesh sieves, make granularity between 70 ~ 80 μm; Be solvent with acetone, be prepared into suspension liquid, be coated in through pretreated matrix surface; Then dry for standby;
3rd step, places cladding block on composite reactive agent surface; The raw material of cladding block is:
At 60%Ni60A+16%Al 2o 3+ 24% (Al+TiO 2+ B 2o 3) basis on, then to add mass percentage be 5%Na 2b 4o 710H 2o; The raw material of cladding block blended evenly after be the water glass of 2.5 according to the modulus adding 1mL ~ 10mL in every 10g powder, and stir immediately and make water glass uniform wet powdered alloy; On-load pressure is 50MPa ~ 100MPa, preparation cladding block; Employing water glass is binding agent, cladding block is bonded at composite reactive agent surface, is placed on ventilation room temperature and dries in the shade 24h, then in drying baker 150 DEG C dry 2h;
The gauge of described cladding block is 1.5 ~ 2.0mm;
Described Al-TiO 2-B 2o 3, comprise analytically pure Al powder, analytically pure TiO 2powder and analytically pure B 2o 3powder, between three, mol ratio is 10:3:3;
4th step, argon arc welding obtains active cladding layer.
2. preparation method according to claim 1, is characterized in that: it is Q235 steel that described body material is chosen for body material.
3. preparation method according to claim 1, is characterized in that: in composite reactive agent prescription, 60% aluminous fly-ash+15.76%SiO 2+ 8.88%B 2o 3+ 15.36%Ti, on this basis, then to add mass percentage be 5%La 2o 3.
4. preparation method according to claim 1, is characterized in that: in the 3rd step, on-load pressure is 80MPa, and cladding block thickness is 1.8mm.
5. preparation method according to claim 1, is characterized in that: described in the 4th step, the processing parameter of argon arc welding is, welding current l20A ~ 180A, welding speed 95 ~ 140mmmin -1, argon flow amount 5.0 ~ 9.5Lmin -1, arc length 1.0 ~ 4.0mm, ceramic nozzle 8#, cerium tungsten electrode, tungsten electrode diameter 2mm, tungsten electrode wedge angle 60 °.
6. preparation method according to claim 5, is characterized in that: the processing parameter of described argon arc welding is, preferably, and welding current 160A, welding cladding speed 110mm/min, argon flow amount 6.5Lmin -1, arc length 3.0mm.
7. a flyash activity Argon arc cladding Ni base Al 2o 3-TiB 2compound coating, is characterized in that: in metallurgical binding between described compound coating and matrix, and the fusion penetration of active cladding layer is respectively 5.25mm and 8.26mm with molten wide, and depth-to-width ratio is 0.64; Al is included in compound coating 2o 3, TiB 2and Fe 2b, also comprises SiO 2, Ni 3si and Fe 1.7al 4si phase.
8. a flyash composite reactive agent, is characterized in that: be main raw material with aluminous fly-ash, with SiO 2, B 2o 3, Ti and La 2o 3for auxiliary activity agent composition, wherein aluminous fly-ash carries out carbonization treatment before use; Composite reactive agent prescription:
At 60% aluminous fly-ash+15.76%SiO 2+ 8.88%B 2o 3on the basis of+15.36%Ti, extra interpolation mass percentage is 5%La 2o 3.
CN201510044621.4A 2015-01-28 2015-01-28 Flyash activity Argon arc cladding Ni base aluminium oxide titanium diboride composite coating and preparation method thereof Expired - Fee Related CN104630769B (en)

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CN108754399A (en) * 2018-06-21 2018-11-06 江西科技师范大学 A kind of titanium diboride coating and preparation method thereof of high temperature resistant fluorination fused salt corrosion
CN112609123A (en) * 2020-12-29 2021-04-06 王翔 Preparation process of wear-resistant bent pipe material
CN115961281A (en) * 2022-12-15 2023-04-14 索罗曼(常州)合金新材料有限公司 Surface corrosion-resistant titanium alloy and preparation method thereof

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CN106894016A (en) * 2017-02-27 2017-06-27 辽宁工程技术大学 Enhanced high-entropy alloy base composite coating of Argon arc cladding titanium carbide and preparation method thereof
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CN112609123A (en) * 2020-12-29 2021-04-06 王翔 Preparation process of wear-resistant bent pipe material
CN115961281A (en) * 2022-12-15 2023-04-14 索罗曼(常州)合金新材料有限公司 Surface corrosion-resistant titanium alloy and preparation method thereof
CN115961281B (en) * 2022-12-15 2024-04-30 索罗曼(常州)合金新材料有限公司 Surface corrosion-resistant titanium alloy and preparation method thereof

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