CN113737177A - High-temperature wear-resistant self-lubricating side guide plate lining plate and processing method thereof - Google Patents
High-temperature wear-resistant self-lubricating side guide plate lining plate and processing method thereof Download PDFInfo
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- CN113737177A CN113737177A CN202111113657.5A CN202111113657A CN113737177A CN 113737177 A CN113737177 A CN 113737177A CN 202111113657 A CN202111113657 A CN 202111113657A CN 113737177 A CN113737177 A CN 113737177A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
- B21C47/3433—Feeding or guiding devices not specially adapted to a particular type of apparatus for guiding the leading end of the material, e.g. from or to a coiler
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0089—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with other, not previously mentioned inorganic compounds as the main non-metallic constituent, e.g. sulfides, glass
Abstract
The invention discloses a high-temperature wear-resistant self-lubricating side guide plate lining plate and a processing method thereof, the side guide plate lining plate is of a sandwich structure, a middle substrate is 45 steel, high-temperature wear-resistant self-lubricating layers obtained by laser cladding are arranged on two sides of the middle substrate, and each high-temperature wear-resistant self-lubricating layer is composed of 85-97 wt% of high-entropy alloy, 1-5 wt% of hexagonal boron nitride and 2-10 wt% of eutectic BaF2/CaF2The high-entropy alloy is NiFeAlCoCrBxConsists of Ni, Fe, Al, Co and Cr in equal molar weight and B in molar content of x, where x is 0.02-0.1, and two laser cladding paths are adopted to form high temperature wear resisting self lubricating coating on the surface of the intermediate base plateAnd (3) a layer. The invention adopts high-entropy alloy to improve the hardness of the lining plate, and adopts boron nitride and eutectic BaF2/CaF2The high-temperature lubricity of the lining plate is improved together, and the problems that the lining plate of the side guide plate is fast worn, the service life is short and the end face of the strip steel is pulled when the strip steel is hot-rolled are effectively solved.
Description
Technical Field
The invention belongs to the field of metallurgical materials, and particularly relates to a high-temperature wear-resistant self-lubricating side guide plate lining plate and a processing method thereof.
Background
The side guide plate lining plate is a key device in a hot rolling plant main rolling line coiling area in front of a hot rolling steel strip production line coiling machine and has the functions of conveying strip steel into a pinch roll in a centering mode, clamping the strip steel when the strip steel enters the pinch roll to reduce the tower shape and staggered layers of a steel coil, clamping the strip steel by the side guide plate at different preset pressures according to different steel types and specifications to cause the lining plate arranged at the contact part of the side guide plate and the strip steel to generate relative sliding friction with the strip steel, wherein during rolling, the temperature of the strip steel is high, the highest temperature can reach 1100 ℃, the passing speed of the strip steel is high and can reach 15m/s, and the lining plate not only bears the friction effect, but also is high-temperature impact friction to quickly cause lining plate abrasion. Therefore, the lining plate of the side guide plate needs to have high-temperature friction resistance and high-temperature impact resistance, namely high-temperature strength and high-temperature hardness are needed, but if the hardness is high, the end face of the strip steel is napped by the lining plate, filiform burrs occur, and the strip steel is damaged, so that the side guide plate needs to have high hardness and cannot cause damage to the edge of the strip steel.
In order to improve the hardness of the lining plate and reduce the edge loss of the strip steel, a high-temperature lubricant is added into a material with high-temperature strength to solve the problem. The common lubricants graphite and molybdenum disulfide are oxidized at high temperature to lose effectiveness, the lubricating effect is lost after the temperature exceeds 400 ℃, hexagonal boron nitride has a structure similar to graphite, is commonly called white graphite and has a high-temperature lubricating effect, the lubricating effect is still good at 900 ℃, but the price of the boron nitride is high, fluoride has high chemical and thermal stability, and eutectic BaF is2/CaF2When the temperature exceeds 400 ℃, the brittle property is changed into the plastic property, the shearing strength is reduced, the good lubricity is shown, the lubricity is not reduced even when the temperature is 950 ℃, and the American NASA adopts Ag and eutectic BaF2/CaF2High-temperature lubricating coatings such as PS200, PS212, PS300, PS304, PS400 and the like are prepared for a lubricating phase, and the friction coefficient fluctuates between 0.16 and 0.4 at the temperature of 500 ℃ and 1000 ℃, so that the problems of high-temperature lubrication of a Stirling engine and the rotation and stop lubrication of a high-temperature starting shaft of an aerodynamic bearing are solved.
Disclosure of Invention
The invention mainly aims to provide a high-temperature wear-resistant self-lubricating side guide plate lining plate, which solves the problems that the side guide plate lining plate is fast worn and short in service life and the end face of strip steel is damaged by pulling when the strip steel is hot-rolled, improves the high-temperature strength, reduces the friction coefficient, avoids the phenomenon of wire drawing of the end face of the strip steel while prolonging the service life of the side guide plate lining plate, and ensures the integrity of the edge part.
The invention also aims to provide a processing method of the high-temperature wear-resistant self-lubricating side guide plate lining plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-temperature wear-resistant self-lubricating side guide plate lining plate provided by the invention is of a sandwich structure, the middle substrate is 45 steel, the two sides of the middle substrate are high-temperature wear-resistant self-lubricating layers obtained by laser cladding, and each high-temperature wear-resistant self-lubricating layer is composed of 85-97 wt% of high-entropy alloy, 1-5 wt% of hexagonal boron nitride and 2-10 wt% of eutectic BaF2/CaF2The high-entropy alloy is NiFeAlCoCrBxConsists of equal mole of Ni, Fe, Al, Co, Cr and B with the mole content of x, wherein x is 0.02-0.1. In order to improve the high-temperature hardness, the high-entropy alloy is laser-cladded on the surface of the substrate to form simple FCC and BCC lattices, the hardness is high, the lattice structure is single, the high-temperature stability is good, and the strength and the hardness are improved through solid solution strengthening and precipitation strengthening; in order to solve the problem of edge damage of the strip steel, high-temperature self-lubricating materials hexagonal boron nitride and eutectic BaF are added into the high-entropy alloy2/CaF2To improve the high temperature self-lubricating properties.
The high-entropy alloy is provided by professor leonurus professor 1995 in Taiwan area of China, the high-entropy alloy contains a plurality of main elements, the number of the main elements of the alloy is generally not less than 5, each main element has higher molar percentage content but not more than 35%, and the content of none of the main elements exceeds 50%. The traditional alloy mainly comprises one main element, generally, intermetallic compounds are easy to generate when the alloy elements are more, so that the performance is deteriorated, and the researches on the high-entropy alloy by leaf-averaged discovery show that after the multi-main-element alloy is solidified, not only a great amount of intermetallic compounds but also a simple crystal FCC phase or BCC phase are not formed. The high-entropy alloy has a high-entropy effect in thermodynamics, inhibits the formation of intermetallic compounds due to high mixing entropy and low mixing enthalpy, tends to generate a simple FCC or BCC solid solution phase, and has a simple lattice structure and high thermal stability. The lattice distortion effect in crystallography, the atomic radius, the lattice structure type and the bonding energy of each component element are different, so that asymmetric gaps and asymmetric bonds are easily formed when a solid solution is formed, a serious lattice distortion effect is caused, and the strength and the hardness of the material can be greatly improved due to the serious lattice distortion. The kinetic delayed diffusion effect is characterized in that due to the fact that the components are free of difference of solvents and solutes, atom configurations of nodes before and after atom migration are different, atoms at different positions need different activation energy during migration, the required energy is continuously changed in the atom transition process and is not beneficial to continuous migration of the atoms, and therefore diffusion of the atoms is retarded, the delayed diffusion effect hinders diffusion of oxygen in the longitudinal direction of the high-entropy alloy coating, the anti-oxidation performance of the high-entropy alloy coating is improved, and the stability of the high-entropy alloy in high-temperature use can be improved due to the delayed diffusion effect. The performance of the high-entropy alloy is not the simple superposition of the performances of alloy elements contained in the system, but the interaction and the cooperation of all the elements contribute to the overall performance, and the performance of the high-entropy alloy is probably far higher than the sum of the performances of all the elements. Such as: the pure Al with low density is a softer material, and when the pure Al is added into a CoCrCuFeNi high-entropy alloy system, the hardness of the high-entropy alloy is not reduced but increased, and the addition of the Al can promote the formation of a BCC hard phase, so that the hardness of the high-entropy alloy is improved.
The high-entropy alloy has the four effects, so that the high-entropy alloy has the characteristics of high strength, high hardness, high wear resistance, high thermal stability, high oxidation resistance, high corrosion resistance and the like. The side guide plate lining plate works at high temperature and bears great high-temperature friction and wear, and if the high-entropy alloy is applied to the side guide plate lining plate, the problems of high-temperature wear resistance and high-temperature oxidation resistance can be solved. Therefore, the invention adopts high-entropy alloy as the main alloy element of the side guide plate lining plate.
On the other hand, the side guide plate lining plate is high in hardness, the end face of the strip steel can be damaged by pulling, edge loss of the strip steel can occur, the high-entropy alloy is purely adopted, the hardness is high, although the service life of the side guide plate lining plate is prolonged, the strip steel product can be damaged, and in order to solve the problem of edge loss of the strip steel, the application provides that high-temperature lubricant hexagonal boron nitride and eutectic BaF are added into the high-entropy alloy2/CaF2Hexagonal boron nitride is commonly called white graphite and cannot lose efficacy at high temperature, the traditional solid lubricant graphite can be oxidized after the temperature exceeds 400 ℃, and the boron nitride cannot be oxidized or cannot be oxidized even at 1300 DEG CThe decomposition is a good high-temperature solid lubricant, but the boron nitride has high melting point, cannot be melted during laser cladding, causes poor melt fluidity, and is easy to generate air holes and cracks, so the content is not easy to exceed 5 wt%, but is lower than 1 wt%, and the self-lubricating effect is poor. To further increase the lubrication performance, a certain amount of eutectic BaF is added2/CaF2Eutectic BaF2/CaF2When the temperature exceeds 400 ℃, the alloy is transformed from brittle to plastic, the shear strength is reduced, good lubricity is shown, the lubricity is not reduced even when the temperature is 950 ℃, and eutectic BaF2/CaF2Has low melting point, good fluidity and properly increased content, can melt in the laser cladding process, and can be eutectic with BaF2/CaF2The addition amount of (B) is 2-10 wt%, and the material brittleness is increased after the content exceeds 10 wt%, cracks are generated, and the lubricating effect is not good when the content is less than 2 wt%.
NiFeAlCoCr is a typical BCC type high-entropy alloy system, FeCoNiCr is the most basic alloy element of high-entropy alloy, because the atomic radii of the elements are similar, the enthalpy of mixing of any two pairs of atomic pairs is very close, a stable solid solution can be well formed, the BCC phase can be promoted to form by adding a proper amount of Al, the Al has larger atomic radius, the caused lattice distortion effect is strong, the addition of a certain amount of B element can enhance the fluidity of the alloy, reduce the melting point of the alloy and improve the wettability among the elements, on the other hand, because the atomic radius of the B element is small, the B element can be dissolved in the crystal lattice in a solid way to cause the crystal lattice distortion and further improve the strength and the hardness of the alloy, the molar ratio of the adding amount of the B element is less than 0.02, the effects of increasing the fluidity and reducing the melting are not obvious, the molar ratio content exceeds 0.1, excessive Cr-B brittle hard phase is generated with Cr, and the alloy is cracked due to excessive hardness, so the value range of the molar content x of B is 0.02-0.1.
The invention provides a processing method of the high-temperature wear-resistant self-lubricating side guide plate lining plate, which comprises the following steps
(1) Preparation of NiFeAlCoCrBxHigh-entropy alloy powder and eutectic BaF2/CaF2Pulverizing;
(2) the NiFeAlCoCrB in the step (1)xHigh-entropy alloy powder and eutectic BaF2/CaF2Powder and powder of sixUniformly mixing the square BN powder to obtain high-temperature wear-resistant self-lubricating powder;
(3) in the step (12), the high-temperature wear-resistant self-lubricating powder is cladded on the two side surfaces of the intermediate substrate through laser; the method comprises the steps of carrying out laser cladding on two paths, wherein the distance between the center of a first path of laser spot and the center of a second path of laser spot is 5-20 mm, the power of the first path of laser is 50-500W, the intermediate substrate is not melted, only oxide skin on the surface of the intermediate substrate is preheated and cleaned, the power of the second path of laser is 2000-8000W, the high-temperature wear-resistant self-lubricating powder and the intermediate substrate are melted at the same time, and a high-temperature wear-resistant self-lubricating layer is formed on the surface of the intermediate substrate.
Preferably, the NiFeAlCoCrBxThe preparation method of the high-entropy alloy powder comprises the following steps: weighing pure Ni, pure Fe, pure Al, pure Co, pure Cr and FeB20 alloy ingot blanks with equal molar ratio, smelting and atomizing under the protection of argon to prepare powder, and screening powder with the particle size of 5-150 um to obtain NiFeAlCoCrBxHigh entropy alloy powder.
Preferably, the eutectic BaF2/CaF2The preparation method of the powder comprises the following steps: weighing 62% of BaF2And 38% CaF2Melting at 1400 ℃ and 1500 ℃, stirring for 10-15 min after melting down, preserving heat for 10-15 min, casting into ingot blank with the diameter of 20-200 mm, cooling, solidifying, crushing, screening powder with the particle size of 5-150 um to obtain eutectic BaF2/CaF2Pulverizing;
preferably, the particle size of the hexagonal BN powder is 5-150 um.
More preferably, the NiFeAlCoCrBxThe high-entropy alloy powder is a powder mixture with the granularity of 5-45 um and 45-150 um respectively.
More preferably, the particle size of the hexagonal BN powder is 5-45 um.
Preferably, in the step (3), the thickness of the single-pass cladding layer is 0.5-1.5 mm, and the total thickness of the high-temperature wear-resistant self-lubricating layer after 2-5 times of cladding is 2-7 mm.
In the processing method, high-entropy alloy powder preparation is a key process, the common powder preparation process at present is ball milling powder preparation, the adopted raw materials are metal powder, Ni powder, Fe powder and the like are put into a ball mill, and wetting agents such as alcohol and the like are added for carrying out ball milling for a long time, the method has long preparation time, small amount and high cost, the obtained powder is flat and has poor fluidity, the powder is difficult to send out from a powder feeder during laser cladding, only the powder paving method can be adopted for carrying out laser cladding, but the powder paving method has great technical difficulty for special-shaped materials such as pipes, rods and the like or parts needing vertical cladding. The invention provides a method for preparing spherical high-entropy alloy powder by adopting a gas atomization method, the adopted raw materials are metal ingot blanks and not metal powder, the metal ingot blanks are smelted into alloy melts with qualified components, the alloy melts are injected into a tundish positioned above an atomization nozzle, the alloy melts meet high-speed airflow and are atomized into fine droplets, the atomized droplets are rapidly solidified into alloy powder, the obtained powder is spherical powder, the powder has high fluidity and can be fed from a powder feeder, the problems that the powder in the ball milling method is flat, the fluidity is poor and the powder cannot be fed from the powder feeder are solved, and the uniformity and the consistency of the components of the obtained high-entropy alloy are superior to those of the ball milling method. When laser cladding is carried out, the powder has large viscosity and can generate agglomeration after the particle size of the powder is less than 5um, so that the particle size of the powder is not less than 5um, the powder has large particle size of more than 150um and can generate the fusion impermeability, and the cladding surface has large roughness, so that the particle size of the high-entropy alloy powder is 5-150 um.
Eutectic BaF2/CaF2The general preparation method of the powder is a ball milling method, and the problems of disc-shaped powder and poor fluidity exist in the same way, the invention adopts a smelting method to prepare 62 percent of BaF by weight2And 38% CaF2Mixing, melting at 1500 deg.C under 1400 deg.C, melting, stirring for 10-15 min for homogenizing and degassing, wherein the stirring time is less than 10min, the degassing effect is not good, and the degassing is completed within 15min, so the stirring time is preferably 10-15 min. Stirring, keeping the temperature for 10-15 min to stabilize the melt, floating or sinking impurities, casting the melt into ingot blank with diameter of 20-200 mm, cooling, solidifying, pulverizing, sieving to obtain eutectic BaF with particle size of 5-150 um2/CaF2The powder, though non-spherical,but the flowability is better than that of the disc.
The prepared granularity is 5-150 umNiFeAlCoCrBxHigh-entropy alloy powder eutectic BaF with granularity of 5-150 um2/CaF2The powder and the hexagonal boron nitride powder with the granularity of 5-150 um are uniformly mixed, the hexagonal boron nitride powder is purchased from the market, and the mixing method can be a mechanical stirring method, a ball milling method and other common methods to obtain the high-temperature wear-resistant self-lubricating powder.
The prepared high-temperature wear-resistant self-lubricating powder is cladded on the surface of a No. 45 substrate by adopting a laser cladding method, the distance between the center of a first path of laser spot and the center of a second path of laser spot is 5-20 mm, the power of the first path of laser is smaller and is 50-500W, a base metal is not melted, and the high-entropy alloy has the functions of preheating and cleaning oxide skin; the power of the 2 nd path laser is larger, the power is 2000-8000W, and the powder and the surface layer of the matrix are melted simultaneously, so that a high-temperature wear-resistant self-lubricating layer is cladded on the surface of the 45 th steel plate, the thickness of single-pass cladding is 0.5-1.5 mm, after 2-5 times of cladding, the total thickness of the cladding layer is 2-7 mm, the thickness of the cladding layer is less than 2mm, the wear-resistant performance is insufficient, the thickness of the cladding layer is more than 7mm, the crack resistance of the cladding layer is reduced, and the cladding layer is easy to crack.
Compared with the prior art, the invention has the following beneficial effects:
(1) the service life of the hot rolled steel side guide plate lining plate is prolonged from 24 hours to 240-300 hours, and the problem of low service life of the side guide plate lining plate is solved.
(2) The invention adopts high-entropy alloy to improve the hardness of the lining plate, and adopts boron nitride and eutectic BaF2/CaF2The high-temperature lubricity of the lining plate is improved together, and the problem of edge damage of the hot-rolled strip steel is solved.
(3) The invention adopts the gas atomization method to prepare the high-entropy alloy powder, solves the problems that the powder prepared by the ball milling method has uneven components and poor powder fluidity and can only be subjected to laser cladding by a long powder spreading method, and can adopt the spray method to carry out the laser cladding.
(4) The invention adopts two laser cladding paths to realize complete metallurgical bonding between the high-entropy alloy and the matrix, and solves the problem of easy heat cracking during the laser cladding of the high-entropy alloy.
Detailed Description
The technical solutions of the present invention are described clearly and completely below, and the described embodiments are only a part of embodiments of the present invention, not all embodiments.
A side guide plate lining plate of a certain steel plant is originally made of 45 steel, the service life is about 24 hours, metal ingots of Ni, Fe, Al, Co and Cr with equal molar ratio are added into a crucible of an atomizing furnace, B with the molar content of 0.05 percent is added, the melting temperature is 1350-. Mixing BaF with the weight percentage of 62 percent2And 38% CaF2Mixing, melting at 1450 deg.C, melting, introducing argon gas, stirring for 12min, stirring, keeping the temperature for 15min, casting the melt into ingot blank with diameter of 150mm, cooling, solidifying, crushing with hammer crusher, grinding into powder, and sieving to obtain eutectic BaF with particle size of 5-150 μm2/CaF2And (3) powder. BN powder with a particle size of 5-45 um was purchased.
Putting the three kinds of powder into a V-shaped mixer, mixing for 24 hours, uniformly mixing, putting into a vacuum drying furnace, drying for 2 hours at 120 ℃, preheating the laser power to 300W, enabling the light spot to be rectangular, cladding the laser power to 4000W, enabling the light spot to be circular, carrying out laser cladding by adopting a paraxial powder feeding method, wherein the lap joint rate is 50%, the distance between the preheating laser and the cladding laser is 10mm, the first cladding thickness is 1.2mm, carrying out co-cladding for 3 times, and the total thickness of the cladding layer is 3.6 mm.
The service life of the high-temperature wear-resistant self-lubricating side guide plate lining plate prepared by the method is 11 days, the service life is prolonged by 11 times compared with that of a 45-steel side guide plate lining plate, and the effect is obvious.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention.
Claims (8)
1. The high-temperature wear-resistant self-lubricating side guide plate lining plate is characterized in that the high-temperature wear-resistant self-lubricating side guide plate lining plate is of a sandwich structure, a middle substrate is 45 steel, high-temperature wear-resistant self-lubricating layers obtained by laser cladding are arranged on two sides of the high-temperature wear-resistant self-lubricating layer, and the high-temperature wear-resistant self-lubricating layers are made of 85-97 wt% of high-entropy alloy, 1-5 wt% of hexagonal boron nitride and 2-10 wt% of eutectic BaF2/CaF2Composition is carried out; wherein the high-entropy alloy is NiFeAlCoCrBxConsists of equal mole of Ni, Fe, Al, Co, Cr and B with the mole content of x, wherein x is 0.02-0.1.
2. The method for processing the lining plate of the high-temperature wear-resistant self-lubricating side guide plate as recited in claim 1, comprising the following steps:
(1) preparation of NiFeAlCoCrBxHigh-entropy alloy powder and eutectic BaF2/CaF2Pulverizing;
(2) the NiFeAlCoCrB in the step (1)xHigh-entropy alloy powder and eutectic BaF2/CaF2Uniformly mixing the powder and hexagonal boron nitride powder to obtain high-temperature wear-resistant self-lubricating powder;
(3) in the step (2), the high-temperature wear-resistant self-lubricating powder is cladded on the two side surfaces of the intermediate substrate through laser; the method comprises the steps of carrying out laser cladding on two paths, wherein the distance between the center of a first path of laser spot and the center of a second path of laser spot is 5-20 mm, the power of the first path of laser is 50-500W, the intermediate substrate is not melted, only oxide skin on the surface of the intermediate substrate is preheated and cleaned, the power of the second path of laser is 2000-8000W, the high-temperature wear-resistant self-lubricating powder and the intermediate substrate are melted at the same time, and a high-temperature wear-resistant self-lubricating layer is formed on the surface of the intermediate substrate.
3. The method of claim 2 wherein the self-lubricating side guide plate is made of high temperature wear resistantThe processing method is characterized in that the NiFeAlCoCrBxThe preparation method of the high-entropy alloy powder comprises the following steps: weighing pure Ni, pure Fe, pure Al, pure Co, pure Cr and FeB20 alloy ingot blanks with equal molar ratio, smelting and atomizing under the protection of argon to prepare powder, and screening powder with the particle size of 5-150 um to obtain NiFeAlCoCrBxHigh entropy alloy powder.
4. The method for processing the lining plate of the high-temperature wear-resistant self-lubricating side guide plate according to claim 2, wherein the eutectic BaF2/CaF2The preparation method of the powder comprises the following steps: weighing 62% of BaF2And 38% CaF2Melting at 1400 ℃ and 1500 ℃, stirring for 10-15 min after melting down, preserving heat for 10-15 min, casting into ingot blank with the diameter of 20-200 mm, cooling, solidifying, crushing, screening powder with the particle size of 5-150 um to obtain eutectic BaF2/CaF2And (3) pulverizing.
5. The processing method of the high-temperature wear-resistant self-lubricating side guide plate lining plate according to claim 2, wherein the particle size of the hexagonal boron nitride powder is 5-150 um.
6. The method for processing the lining plate of the high-temperature wear-resistant self-lubricating side guide plate according to claim 3, wherein the NiFeAlCoCrBxThe high-entropy alloy powder is a powder mixture with the granularity of 5-45 um and 45-150 um respectively.
7. The processing method of the high-temperature wear-resistant self-lubricating side guide plate lining plate according to claim 5, wherein the particle size of the hexagonal boron nitride powder is 5-45 um.
8. The method for processing the lining plate of the high-temperature wear-resistant self-lubricating side guide plate according to claim 2, wherein in the step (3), the thickness of a single-pass cladding layer is 0.5-1.5 mm, and the total thickness of the high-temperature wear-resistant self-lubricating layer after 2-5 times of cladding is 2-7 mm.
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| CN202111113657.5A CN113737177A (en) | 2021-09-23 | 2021-09-23 | High-temperature wear-resistant self-lubricating side guide plate lining plate and processing method thereof |
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| CN202111113657.5A CN113737177A (en) | 2021-09-23 | 2021-09-23 | High-temperature wear-resistant self-lubricating side guide plate lining plate and processing method thereof |
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| US20170327701A1 (en) * | 2016-05-13 | 2017-11-16 | NanoCore Technologies | Sinterable metal paste for use in additive manfacturing |
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| CN110592580A (en) * | 2019-09-29 | 2019-12-20 | 上海大陆天瑞激光表面工程有限公司 | Laser cladding side guide plate and machining method thereof |
| CN111118496A (en) * | 2020-01-19 | 2020-05-08 | 中国人民解放军陆军装甲兵学院 | Tough high-entropy alloy forming structure and preparation method thereof |
| CN111349881A (en) * | 2020-03-20 | 2020-06-30 | 中国科学院兰州化学物理研究所 | Wide-temperature-range lubricating wear-resistant composite coating and preparation and spraying methods thereof |
| CN111519078A (en) * | 2020-04-27 | 2020-08-11 | 浙江亚通焊材有限公司 | High-nickel eutectic high-entropy alloy powder for additive manufacturing and preparation method thereof |
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| CN105543521A (en) * | 2015-12-30 | 2016-05-04 | 武汉理工大学 | Ag-Sn-Cu/metal ceramic composite high-temperature lubricating layer material and preparation method thereof |
| US20170327701A1 (en) * | 2016-05-13 | 2017-11-16 | NanoCore Technologies | Sinterable metal paste for use in additive manfacturing |
| CN109637742A (en) * | 2018-11-06 | 2019-04-16 | 浙江三行电气科技有限公司 | A kind of production technology of tension polyimides coil enameled wire |
| CN110592580A (en) * | 2019-09-29 | 2019-12-20 | 上海大陆天瑞激光表面工程有限公司 | Laser cladding side guide plate and machining method thereof |
| CN111118496A (en) * | 2020-01-19 | 2020-05-08 | 中国人民解放军陆军装甲兵学院 | Tough high-entropy alloy forming structure and preparation method thereof |
| CN111349881A (en) * | 2020-03-20 | 2020-06-30 | 中国科学院兰州化学物理研究所 | Wide-temperature-range lubricating wear-resistant composite coating and preparation and spraying methods thereof |
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