CN102039384B - Manufacturing method of composite coating layer on surface of high-resistant crystallizer or crystallizing roller - Google Patents
Manufacturing method of composite coating layer on surface of high-resistant crystallizer or crystallizing roller Download PDFInfo
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Abstract
The invention relates to a manufacturing method of a composite coating layer on the surface of a high-resistant crystallizer or a crystallizing roller. The manufacturing method is as follows: adopting a preparation technology of a cold-gas dynamic spraying composite coating layer; utilizing high-pressure gas to carry metal or mixed particles of alloy matrix particles and hard reinforcement particles; increasing the speed of the metal or the mixed particles by a supersonic nozzle to be extremely high so as to collide with the surface of a copper alloy matrix of the crystallizer or the crystallizing roller; and generating strong plastic deformation by the metal or the alloy particles so as to lead the metal or the alloy particles to be bonded on the surface of the crystallizer or the crystallizing roller to form a composite coating layer. By utilizing the manufacturing method, good heat conductivity of the metal or the alloy matrix and excellent wear-resistant performance of a reinforcement are utilized comprehensively, the surface coating layer of the crystallizer or the crystallizing roller with good comprehensive performance is obtained, and the online service life of the crystallizer or the crystallizing roller is prolonged.
Description
Technical field
The present invention relates to manufacturing and the recovery technique of continuous cast mold or crystallization roller, particularly high abrasion crystallizer or crystal roller surface composite coating and manufacture method thereof.
Background technology
Crystallizer is the critical component, particularly metal sheet band in the metal continuous cast tandem rolling plant equipment, the continuous casting of thin plate, and it mainly acts on is that the strip blank with certain concreting thickness is cooled off, is frozen into to molten metal fast.The crystallization roller is the critical component in the continuously casting thin metal strips tandem rolling plant equipment, be that molten steel enters the molten bath of being made up of crystallization roller and the side seal board of two reverse rotations by current distribution device, liquid metal is frozen at the crystallization roll surface through quick cooling has certain thickness base shell, closes back formation strip (plate) through rolling.Because crystallizer or crystal roller surface directly contact with molten liquid steel, be subjected to erosion and the wearing and tearing of molten steel in the course of work, crystallizer or crystallization roller are in use in order to improve softening temperature and the case hardness of copper alloy roller shell and molten metal contact-making surface, generally at wear-resisting metal or its alloy of crystal roller surface plating one deck.The most frequently used metal is coated with (plating) layer and comprises following several:
(1) plating Cr layer: coming off after the layer oxide film as thin as a wafer that plating Cr laminar surface forms is split the molten steel grain that splashes that produces when watering and is solidified is very useful, peel off easily when but coating is thicker, and crystallizer or crystallization roller plating Cr complex process, the chemical waste fluid of generation causes serious environmental to pollute.
(2) Ni+Cr composite deposite: because the thermal coefficient of expansion of Ni is close to Cu, the problem of peeling off is improved greatly, and thickness increases.Ni has solved adhesive force and thickness problem, and Cr has solved overspray and case hardness problem.In order to solve the relatively poor problem of Ni pyroconductivity, introduced the inclined-plane layer process, the Ni layer thickness at meniscus place can be controlled in about 0.2mm, and exit Ni layer thickness is controlled about 3mm.The Cr layer as thin as a wafer, thicker Ni layer is very soft again, fails to satisfactorily resolve crystallizer bottom antifriction consumption problem.Owing to the raising of casting rate, thinner base shell is close to the copper coin surface under the ferrostatic pressure effect, increased the mechanical friction load on the one hand; On the other hand, the zero defect casting technology is more and more stricter to the requirement of mold shape precision, and the crystallizer replacement cycle is depended on bottom abrasion amount.
(3) Ni-Fe coating: when adding Fe or adding W and Fe in Ni, the hardness of coating obviously improves, and presses Fe content difference, can regulate hardness in HV250～550 scopes, and elevated temperature strength (400 ℃) is 2.5 times of Ni, and individual layer is electroplated and just can be realized than thickness coating.Though Ni-Fe cladding wearability and steel-passing amount all are greatly improved than Ni coating, electroplating efficiency is low, complex process, and environmental pollution is serious.
(4) Ni-Co or Co-Ni coating: Ni-Co coating and Co-Ni coating have further improved the wearability of coating, improve the service life of copper plate of crystallizer.This is the high temperature alloy of two kinds of different matrix in fact, and Ni-Co is the nickel-base alloy that contains cobalt, and Co-Ni is nickeliferous cobalt-base alloys.Its performance has had further raising again than Ni-Fe coating, and the performance of Co-Ni coating is more better, but electroplating efficiency is low, complex process, and environmental pollution is serious.
(5) Ni-Cr alloy spraying coating: in plate slab crystallizer uses, the wear resistance ratio broadside copper coin of narrow limit copper coin is more serious, in order to improve the service life of narrow limit copper coin, at narrow limit copper coin surface HVAF layer of Ni-Cr alloy-layer, replace electrodeposited coating, its service life can be suitable with the Co-Ni coating life-span of broadside copper coin.But this technology easily produces bigger thermal stress; And make tissue odds even owing to forming new heat treating regime in the thermal spray process, and be easy to cause thermal deformation.The thawing of metal and solidify easy generation oxidation again in the thermal spray process, the increase of oxygen content can reduce the thermal conductivity of material greatly, and also is very difficult to remove in these oxygen elements process afterwards.Airless spraying can be alleviated degree of oxidation to a certain extent, but airless spraying cost height, and be difficult to control.
Chinese patent publication number CN1781644 adopts the cold air power spraying and coating technology at the repair layer of crystal roller surface preparation with matrix material of the same race, realize reparation and the regeneration of crystallization roller wearing layer, this method heat input is few, can not cause the variation of chemical composition and institutional framework.
The Chinese patent publication number is the patent utilization cold air power spraying and coating method of CN1781643, forms new surface on the surface of continuous cast mold, fills crack or wearing and tearing groove etc.
The patent of Chinese patent publication number CN1781623 provides a kind of method for producing continuous casting crystalli-zing roll, at first the roller core upper edge of crystallization roller roller core shaft to drive into, apopore, have water-guiding hole at the roller core wall, be communicated with into and out of the water hole respectively and roller core outer surface; Roller core outer surface at the crystallization roller is installed metal tube, respectively by the water-guiding hole on the roller core wall with is communicated with a plurality of cooling circuits of formation into and out of the water hole, formation crystallization roller cooling system; Adopt cold air power spraying and coating, to drive metallic particles with high-speed impact crystallization roller roller core outer surface greater than the 1.0MPa pressed gas, enough distortion take place and are bonded on crystallization roller roller core surface and the cooling circuit outer surface in metallic particles, filling pore, and then form enough coating layer thicknesses cooling circuit is buried fully, and the crystallization roll sleeve of formation adequate thickness, finish the manufacturing of crystallization roller.
The patent of Chinese patent publication number CN1766151 provides a kind of method of its copper coin of HVAF crystallization, and its characteristics are to comprise following method step: at first with conventional cleaning process the surface of copper plate of crystallizer is cleaned and blasting treatment; Secondly, get nickel-base alloy particle 50%～95% by gross mass percentage, and add 5%～50% alumina particle and mix, obtain required spray paint; Then, with obtaining pack in supersonic spray coating equipment operation routinely of spray paint the surface of copper plate of crystallizer is sprayed.
In summary, it all is metal and alloy thereof that crystallizer or the crystal roller surface that adopts plating or thermal spraying to prepare is coated with (plating) layer, the wearability that is coated with (plating) layer increases than copper alloy matrix, but is difficult to further improve hardness and the wearability that is coated with (plating) layer in metal and alloys range again; Simultaneously, the electroplating technology complexity produces a large amount of chemical waste fluids, and environmental pollution is serious; Can introduce a large amount of heat in the plasma spray technology course of work, make very easily oxidation of coating material, cause change in organization, and can produce very big thermal stress and thermal deformation at crystallizer or crystallization roller body.
The cold-air dynamic spraying technology is to utilize gases at high pressure to carry powder particle from axially entering high velocity air, produce supersonic flow by convergent-divergent pipe (superonic flow nozzzle), powder particle at the solid-state fully matrix of bump down, is deposited on matrix surface formation adhesion by producing enough big plastic deformation after the superonic flow nozzzle acceleration.Because coating is to prepare under the temperature of melting point metal, avoids the introducing of too much heat, can eliminate the adsorb oxygen layer of matrix surface, improves the adhesion between repair layer and the matrix, and be conducive to keep the structure stability of reparation.At present, adopting the cold air power spraying and coating technology to prepare crystal roller surface hard particles enhancing composite coating does not appear in the newspapers as yet.
Summary of the invention
The purpose of this invention is to provide a kind of thermal conductive resin that has, the manufacture method of the crystallizer of high temperature hardness and wearability or crystal roller surface composite coating, this coating is made up of two parts: a part is the matrix that heat conduction good metal or alloy form, another part is hard metal, the enhancing body of alloy or nonmetal formation, hard strengthens body and is evenly distributed in the matrix, the thermal conductivity that the comprehensive utilization matrix is good and enhancing body excellent abrasive energy, obtain crystallizer or the crystal roller surface coating of high comprehensive performance, improve crystallizer or crystallization roller online service life.
For achieving the above object, technical scheme of the present invention is, adopt cold air power spraying and coating composite coating technology of preparing, namely utilize gases at high pressure to carry the hybrid particles of metal or alloy matrix particulate and hard enhancing body particulate, add to flank speed through superonic flow nozzzle and impinge upon crystallizer or crystallization roller copper alloy matrix surface, stick to crystallizer or crystal roller surface by metal or alloy particulate generation intense plastic strain; The adding method that hard strengthens body has two kinds: the one, and hard mixes before strengthening body particulate and the spraying of metal or alloy particulate, forms and strengthens the equally distributed mixed-powder of body, adopts method for preparing cold air power spraying and coating composite coating then; Another kind method is that metal or alloy particulate and hard enhancing body particulate are contained in respectively in the two cover dust feeders in parallel, in the cold air power spraying and coating process, strengthen the ratio of body according to required hard, set the transfer rate of two cover dust feeders, prepare one deck composite coating at crystallizer or crystal roller surface.Strengthen the body adjustable ratio in the composite coating material, be evenly distributed in the matrix of metal or alloy, select whether to carry out subsequent heat treatment and deformation process according to actual needs.
High abrasion crystallizer of the present invention or crystal roller surface composite coating, it comprises that metal or alloy particulate and hard strengthen the body particulate, metal or alloy diameter of particle scope is 1～400 micron, and it is 1～300 micron that hard strengthens body diameter of particle scope, and the hardness that strengthens the body material is higher than HV500; Above-mentioned two kinds of particulates mix, and it is 1～50% that hard strengthens body particulate proportion scope volume ratio, and preferred 10%～30%.
Further, it can be aluminium oxide, titanium oxide, zirconia, yittrium oxide, silica, boron nitride, silicon nitride, carborundum, tungsten carbide or diamond that hard strengthens the body microparticle material, also can be hard chrome, tungsten alloy, high-speed steel, high temperature alloy, tantalum alloy or amorphous alloy, can also be the mixture of above-mentioned two or more particulates.
Metal and alloy particle material thereof can be the mixtures of titanium or titanium alloy, copper and copper alloy, nickel and nickel alloy, chromium and evanohm, cobalt and cobalt alloy, iron and ferroalloy or above-mentioned simple metal or alloy.
Metal or alloy diameter of particle particle size range is 5～50 microns; It is 5～30 microns that hard strengthens body diameter of particle scope.
The manufacture method of high abrasion crystallizer of the present invention or crystal roller surface composite coating, it comprises the steps:
1) clears up crystallizer or crystal roller surface, obtain the surface of drying, light;
2) crystallizer or crystal roller surface are carried out the texturing processing, form the uniform unsalted surface of roughness at crystallizer or crystallization roller;
3) prepare composite coating at crystallizer or crystal roller surface cold air power spraying and coating;
Preparation metal or alloy particulate and hard strengthen the body particulate, and metal or alloy diameter of particle scope is 1～400 micron, and it is 1～300 micron that hard strengthens body diameter of particle scope, and the hardness that strengthens the body material is higher than HV500; Above-mentioned two kinds of particulates are mixed, and it is 1～50% that hard strengthens body particulate proportion scope volume ratio; Utilize cold air power spraying and coating composite coating technology, the hybrid fine particles that adopts gases at high pressure to carry aforementioned proportion is sprayed on crystallizer or crystal roller surface forms composite coating, and composite coating thickness is h
1=0.3～5mm;
4) answer heating means to carry out surperficial stress relief annealing at the composite coating employing of different-thickness and handle, 850～950 ℃ of annealing temperatures, adding the heat affecting layer depth is h
2=h
1+ (0.3～1) mm, h
2For the surface heat processing influences layer depth.
Further, mechanically deform intensive treatment such as composite coating can forge, roll-in also can not carried out deformation process;
Again, after crystal roller surface coating preparation is finished, can carry out car to coating, mill, machining such as mill, also can not carry out machining.
Texturing is handled and is adopted sandblast texturing, or adopts supersonic microparticle erosion texturing, or adopts laser roughening or electric spark texturing.
Metal or alloy diameter of particle particle size range is the 5-50 micron; It is 5～30 microns that hard strengthens body diameter of particle scope.
In addition, metal or alloy particulate and hard strengthen the body particulate evenly to be mixed, and it is 10%～30% that hard strengthens body particulate proportion scope.
Utilize cold air power spraying and coating composite coating technology, air pressure 1.5～5MPa, 200 ℃～800 ℃ of working gas temperatures, individual layer prepare thickness≤500 micron.
Metal or alloy particulate and the hard of preparation are strengthened the powder conveying device that the body particulate is respectively charged into two cover parallel connections, according to actual needs, regulate the powder feeding rate of two cover powder conveying devices, obtain the metal or alloy of different proportionings and the hybrid fine particles that hard strengthens body, the two even mixing is delivered to spray gun throat front end by dust feeder; The hybrid fine particles that adopts gases at high pressure to carry aforementioned proportion is sprayed on crystallizer or crystal roller surface.
It can be aluminium oxide, titanium oxide, zirconia, yittrium oxide, silica, boron nitride, silicon nitride, carborundum, tungsten carbide or diamond that hard strengthens the body microparticle material, also can be hard chrome, tungsten alloy, high-speed steel, high temperature alloy, tantalum alloy or amorphous alloy, can also be the mixture of above-mentioned two or more particulates.
Metal and alloy particle material thereof can be the mixtures of titanium or titanium alloy, copper and copper alloy, nickel and nickel alloy, chromium and evanohm, cobalt and cobalt alloy, iron and ferroalloy or above-mentioned simple metal or alloy.
Concrete technology is as follows:
(1) cleaning crystallizer or crystal roller surface can adopt machining process, also can adopt chemical corrosion method, finally obtain the surface of drying, light;
(2) crystallizer or crystal roller surface are carried out the texturing processing, form the uniform unsalted surface of roughness at crystallizer or crystallization roller, can adopt sandblast texturing, also can adopt supersonic microparticle erosion texturing, can also adopt laser roughening or electric spark texturing;
(3) crystallizer or crystal roller surface cold air power spraying and coating prepare the composite coating method two kinds, as follows respectively:
First method:
Preparation metal or alloy particulate and hard strengthen the body particulate, and metal or alloy diameter of particle scope is 1～400 micron, and the preferable particle size scope is 5～50 microns; It is 1～300 micron that hard strengthens body diameter of particle scope, and the preferable particle size scope is 5～30 microns;
Above-mentioned two kinds of powder are evenly mixed, and it is 1～50% that hard strengthens body particulate proportion scope (volume ratio %), and the preferred proportion scope is 10%～30%;
Utilize cold air power spraying and coating composite coating technology, the hybrid fine particles that adopts gases at high pressure to carry aforementioned proportion is sprayed on crystallizer or crystal roller surface, concrete technology is: air pressure 1.5～5MPa, 200 ℃～800 ℃ of working gas temperatures, individual layer prepare thickness≤500 micron;
Second method:
Preparation metal or alloy particulate and hard strengthen the body particulate, and metal or alloy diameter of particle scope is 1～400 micron, and the preferable particle size scope is 5～50 microns; It is 1～300 micron that hard strengthens body diameter of particle scope, and the preferable particle size scope is 5～30 microns;
Metal or alloy particulate and the hard of preparation are strengthened the powder conveying device that the body particulate is respectively charged into two cover parallel connections, according to actual needs, regulate the powder feeding rate of two cover powder conveying devices, obtain the metal or alloy of different proportionings and the hybrid fine particles that hard strengthens body, the two even mixing is delivered to spray gun throat front end by dust feeder;
It is 0～100% that above-mentioned hard strengthens body particulate proportion scope (V%), and the preferred proportion scope is 10%～30%;
Utilize cold air power spraying and coating composite coating technology, the hybrid fine particles that adopts gases at high pressure to carry aforementioned proportion is sprayed on crystallizer or crystal roller surface, concrete technology is: air pressure 1.5～5MPa, 200 ℃～800 ℃ of working gas temperatures, individual layer prepare thickness≤500 micron;
(4) hard enhancing body microparticle material can be aluminium oxide, titanium oxide, zirconia, yittrium oxide, silica, boron nitride, silicon nitride, carborundum, tungsten carbide, diamond in the above-mentioned composite coating, also can be hard chrome, tungsten alloy, high-speed steel, high temperature alloy, tantalum alloy, amorphous alloy, can also be the mixture of above-mentioned two or more particulates.
(5) hardness of above-mentioned enhancing body material is higher than HV500.
(6) the above-mentioned composite coating matrix mixture that can be titanium or titanium alloy, copper and copper alloy, nickel and nickel alloy, chromium and evanohm, cobalt and cobalt alloy, iron and ferroalloy or above-mentioned simple metal or alloy.
(7) above-mentioned composite coating hard particles enhancing body burden can be regulated arbitrarily in 1～50% scope, and preferably strengthening the body burden scope is 10%～30%.
(8) the coating layer thickness scope is h
1=0.3～5mm adopts intermediate frequency, high frequency or hyperfrequency load coil to carry out surperficial stress relief annealing at the coating of different-thickness and handles, 850～950 ℃ of annealing temperatures, and preferably adding the heat affecting layer depth is h
2=h
1+ (0.3～1) mm, wherein, h
1Be coating layer thickness, h
2For the surface heat processing influences layer depth.
(9) above-mentioned composite coating can forge, mechanically deform such as roll-in handles, and also can not carry out deformation process.
(10) after the preparation of above-mentioned crystal roller surface coating is finished, can carry out car to coating, mill, machining such as mill, also can not carry out machining.
Beneficial effect of the present invention:
Can prepare 0～40mm hard particles at crystal roller surface and strengthen the Metal Substrate composite coating; Hard particles strengthens body and evenly distributes immediately in composite coating inside; Crystal roller surface forms the metallic matrix composite coating with good heat conductive and anti-wear performance; The coating thermal conductivity reaches more than 75% of matrix material, and coating wear resistance improves more than 10%.
Description of drawings
Fig. 1 strengthens composite coating preparation technology flow process for crystal roller surface particle of the present invention.
Fig. 2 is Fe base amorphous alloy particle enhanced nickel base composite coating surface SEM photo.
Fig. 3 is α-Al
2O
3Particle enhanced copper alloy composite coating pattern.
The specific embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Referring to Fig. 1, the bright crystal roller surface particle of the present invention strengthens composite coating preparation technology flow process.
Embodiment 1
The composite coating matrix material is nickel-alloy coating, 30 microns of used powder average grain diameters; Strengthening body is irregularly shaped Fe base amorphous alloy, strengthens 90 microns of body average-sizes; Strengthening the body granule content is 18%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is industrial nitrogen, air pressure 3.0MPa, and 500 ℃ of working gas temperatures, individual layer prepare 200 microns of thickness.The gross thickness of gained composite coating is 4mm, composite coating pattern and the distribution that strengthens the body particle as shown in Figure 2, Fe base amorphous strengthens the body disperse and is distributed in the Ni matrix, the adding that amorphous strengthens body makes the composite coating wearability improve 35% than the Ni matrix.
Embodiment 2
The composite coating matrix material is copper alloy coating, 25 microns of used powder average grain diameters; The enhancing body is α-Al
2O
3Particle strengthens 70 microns of body average-sizes; Strengthening the body granule content is 20%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is industrial nitrogen, air pressure 2.6MPa, and 420 ℃ of working gas temperatures, individual layer prepare 220 microns of thickness.The gross thickness of gained composite coating is 5mm, composite coating pattern and the distribution that strengthens the body particle as shown in Figure 3, α-Al
2O
3Particle is uniformly dispersed in the Cu matrix, α-Al
2O
3The adding of particle makes the composite coating wearability improve 30% than the Cu matrix.
Embodiment 3
The composite coating matrix material is the evanohm coating, 25 microns of used powder average grain diameters; The enhancing body is silicon-carbide particle, strengthens 30 microns of body average-sizes; Strengthening the body granule content is 20%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is industrial nitrogen, air pressure 3.6MPa, and 700 ℃ of working gas temperatures, individual layer prepare 150 microns of thickness.The gross thickness of gained composite coating is 3mm, and the composite coating wearability improves 28% than matrix.
Embodiment 4
The composite coating matrix material is copper alloy and nickel alloy mixed coating, 25 microns of used copper alloy powder average grain diameters, 22 microns of nickel alloy average grain diameters; The enhancing body is diamond particles, strengthens 50 microns of body average-sizes; Strengthening the body granule content is 10%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is industrial nitrogen, air pressure 3.0MPa, and 450 ℃ of working gas temperatures, individual layer prepare 1300 microns of thickness.The gross thickness of gained composite coating is 3mm, and the composite coating wearability improves 25% than matrix.
Embodiment 5
The composite coating matrix material is cobalt-nickel alloy, 28 microns of used powder average grain diameters; The enhancing body is tungsten carbide particle, strengthens 10 microns of body average-sizes; Strengthening the body granule content is 15%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is high-purity helium, air pressure 4.0MPa, and 750 ℃ of working gas temperatures, individual layer prepare 150 microns of thickness.The gross thickness of gained composite coating is 2mm, and the composite coating wearability improves 30% than matrix.
Embodiment 6
The composite coating matrix material is 304 stainless steels, 22 microns of used powder average grain diameters; The enhancing body is yttria particles, strengthens 15 microns of body average-sizes; Strengthening the body granule content is 10%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is high pure nitrogen, air pressure 4.0MPa, and 750 ℃ of working gas temperatures, individual layer prepare 200 microns of thickness.The gross thickness of gained composite coating is 2.5mm, and the composite coating wearability improves 15% than matrix.
Embodiment 7
The composite coating matrix material is titanium alloy, 28 microns of used powder average grain diameters; Strengthening body is the hard chrome particle, strengthens 20 microns of body average-sizes; Strengthening the body granule content is 30%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is high-purity helium, air pressure 4.0MPa, and 750 ℃ of working gas temperatures, individual layer prepare 100 microns of thickness.The gross thickness of gained composite coating is 2mm, and the composite coating wearability improves 15% than matrix.
Embodiment 8
The composite coating matrix material is nickel alloy, 22 microns of used powder average grain diameters; The enhancing body is boron nitride particle, strengthens 10 microns of body average-sizes; Strengthening the body granule content is 20%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is industrial nitrogen, air pressure 4.0MPa, and 550 ℃ of working gas temperatures, individual layer prepare 160 microns of thickness.The gross thickness of gained composite coating is 4mm, and the composite coating wearability improves 35% than matrix.
Embodiment 9
The composite coating matrix material is copper alloy, 23 microns of used powder average grain diameters; The enhancing body is zirconia particles, strengthens 14 microns of body average-sizes; Strengthening the body granule content is 30%; Crystal roller surface is through turning, blasting treatment, and cold air power spraying and coating preparation technology is as follows: working gas is high-purity helium, air pressure 3.0MPa, and 450 ℃ of working gas temperatures, individual layer prepare 100 microns of thickness.The gross thickness of gained composite coating is 10mm, and the composite coating wearability improves 20% than matrix.
Claims (10)
1. the manufacture method of high abrasion crystallizer or crystal roller surface composite coating, it comprises the steps:
1) clears up crystallizer or crystal roller surface, obtain the surface of drying, light;
2) crystallizer or crystal roller surface are carried out the texturing processing, form the uniform unsalted surface of roughness at crystallizer or crystallization roller;
3) prepare composite coating at crystallizer or crystal roller surface cold air power spraying and coating;
Preparation metal or alloy particulate and hard strengthen the body particulate, and metal or alloy diameter of particle scope is 1～400 micron, and it is 1～300 micron that hard strengthens body diameter of particle scope, and the hardness that strengthens the body material is higher than HV500; Above-mentioned two kinds of particulates are mixed, and it is 1～50% that hard strengthens body particulate proportion scope volume ratio; Utilize cold air power spraying and coating composite coating technology, the hybrid fine particles that adopts gases at high pressure to carry aforementioned proportion is sprayed on crystallizer or crystal roller surface forms composite coating, and composite coating thickness is h
1=0.3～5mm;
4) composite coating at different-thickness adopts induction heating method to carry out surperficial stress relief annealing processing, 850～950 ℃ of annealing temperatures, and adding the heat affecting layer depth is h
2=h
1+ (0.3～1) mm, h
2For the surface heat processing influences layer depth.
2. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating is characterized in that, mechanically deform intensive treatment such as composite coating forges, roll-in, or do not carry out deformation process.
3. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating is characterized in that, after crystal roller surface coating preparation is finished, and the machining that coating is carried out car, milled, grinds.
4. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating is characterized in that, texturing is handled and adopted sandblast texturing, or adopts supersonic microparticle erosion texturing, or adopts laser roughening or electric spark texturing.
5. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating is characterized in that, metal or alloy diameter of particle scope is 5～50 microns; It is 5～30 microns that hard strengthens body diameter of particle scope.
6. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating is characterized in that, metal or alloy particulate and hard strengthen the body particulate evenly to be mixed, and it is 10%～30% that hard strengthens body particulate proportion scope volume ratio.
7. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating, it is characterized in that, utilize cold air power spraying and coating composite coating technology, air pressure 1.5～5MPa, 200 ℃～800 ℃ of working gas temperatures, individual layer prepare thickness≤500 micron.
8. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating, it is characterized in that, metal or alloy particulate and the hard of preparation are strengthened the powder conveying device that the body particulate is respectively charged into two cover parallel connections, according to actual needs, regulate the powder feeding rate of two cover powder conveying devices, obtain the metal or alloy of different proportionings and the hybrid fine particles that hard strengthens body, the two even mixing is delivered to spray gun throat front end by dust feeder; The hybrid fine particles that adopts gases at high pressure to carry aforementioned proportion is sprayed on crystallizer or crystal roller surface.
9. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating, it is characterized in that it is aluminium oxide, titanium oxide, zirconia, yittrium oxide, silica, boron nitride, silicon nitride, carborundum, tungsten carbide or diamond that hard strengthens the body microparticle material; Or hard chrome, tungsten alloy, high-speed steel, tantalum alloy or amorphous alloy; Or the mixture of above-mentioned two or more particulates.
10. the manufacture method of high abrasion crystallizer as claimed in claim 1 or crystal roller surface composite coating, it is characterized in that metal and alloy particle material thereof are the mixtures of titanium or titanium alloy, copper and copper alloy, nickel and nickel alloy, chromium and evanohm, cobalt and cobalt alloy, iron and ferroalloy or above-mentioned simple metal or alloy.
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