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39results about How to "Improve hot corrosion resistance" patented technology
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Multilayer thermal barrier coating and preparation method thereof
InactiveCN102127738ANo layer peeling phenomenon occursImprove hot corrosion resistanceMolten spray coatingVacuum evaporation coatingPorosityElectron beam physical vapor deposition
The invention provides a multilayer thermal barrier coating and a preparation method thereof. The multilayer thermal barrier coating sequentially comprises an adhesion layer, a first ceramic layer, a second ceramic layer and a closing layer from bottom to top, wherein the closing layer has the thickness of 10-30 micros and the porosity of 2-8 percent and is made from the Al2O3. The thermal barrier coating can be prepared by adopting an electron beam physical gas-phase deposition technology or a plasma spraying method. The multilayer thermal barrier coating provided by the invention can avoid the stripping of the ceramic layers in a thermal circulating process, the thermal erosion resistance of the thermal barrier coating is greatly improved than the dual ceramic layers; and vertical crackles are introduced in the ceramic layer through improving a conventional plasma spraying process so that the thermal shock life of the thermal barrier coating is greatly prolonged.
Owner:BEIHANG UNIV
Ni-base superalloy complex gradient coating and preparation technique thereof
InactiveCN101310971ADoes not bring strippingImprove scoreLayered productsVacuum evaporation coatingSuperalloyDepth direction
The invention mainly relates to the coating technique, in particular to a gradient MCrAlY coating used for protecting high-temperature alloy and a preparation method thereof. The invention prepares an MCrAlY composite gradient coating by adopting the method combining the arc ion plating (AIP) and the diffusion aluminizing. The thickness of an aluminum-rich layer on the surface of the MCrAlY composite coating can be controlled by setting the aluminizing temperature and the period of heat preservation and the Al elements are distributed in a gradient way along the depth direction; in addition, the chemical vapor deposition method used for the aluminizing has the advantages of good uniformity on the aluminum-rich layer and being not affected by the size and shape of a sample. Since the method of direct diffusion is adopted without introducing a weak interface, the MCrAlY high-temperature protective coating can increase the content of Al memory phase to the utmost extent under the condition that the mechanical property of the coating is guaranteed, so as to improve the high-temperature oxidization resistance and the heat corrosion resistance of the coating, and can effectively prolong the service life of the coating. The MCrAlY composite gradient coating and the preparation method of the invention can be applied to the protection of Ni-based and Co-based high-temperature alloys.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Process for preparing nickel-base superalloy
ActiveCN102808113AElimination of lateral grain boundariesImprove organizationPolycrystalline material growthSingle crystal growth detailsSmelting processRoom temperature
The invention discloses a process for preparing nickel-base superalloy. The superalloy consists of the following components in percentage by weight: 22.5 to 24.5 percent of Cr, 7.0 to 8.0 percent of Co, 6.5 to 7.5 percent of W, 3.0 to 4.0 percent of Mo, 1.2 to 1.8 percent of Al, 1.5 to 2.5 percent of Ti, 2.0 to 3.0 percent of Nb, 1.0 to 2.0 percent of Mn, 2.0 to 4.0 percent of Fe, 0.02 to 0.08 percent of B, 0.5 to 1.5 percent of Ce, less than or equal to 0.1 percent of C, less than or equal to 0.2 percent of Si, less than or equal to 0.008 percent of P, less than or equal to 0.008 percent of S and the balance of Ni. The process for preparing the nickel-base superalloy comprises a smelting process and a heat treatment process, wherein the smelting process comprises the steps of: smelting master alloy by using a vacuum induction furnace, and performing directional solidification in a liquid metal directional furnace to prepare directional column crystal alloy, wherein the vacuum degree of the directional furnace is about (1-5)*10<-4>mmHg, the pouring temperature is 1,580 to 1,600 DEG C, the drawing speed is 4 to 8mm / min, the temperature gradient is 75 to 85 DEG C / cm, and the temperature of liquid tin is 250 to 350 DEG C; the heat treatment process comprises the following steps of: heating the column crystal alloy obtained through smelting to 1,240 to 1,260 DEG C, preserving heat for 3 to 5 hours, and performing air cooling to room temperature; heating to 1,150 to 1,170, preserving heat for 3 to 5 hours, and performing air cooling to room temperature; and heating to 930 to 950 again, preserving heat for 8 to 12 hours and performing air cooling to room temperature.
Owner:南通大地电气股份有限公司
Titanium aluminum alloy surface high temperature oxidation and hot corrosion resistant Al-Cr coating and preparation method thereof
InactiveCN104760349AImprove high temperature oxidation resistanceAccelerated corrosionVacuum evaporation coatingSputtering coatingOxidation resistantThermal shock
The present invention discloses a titanium aluminum alloy surface high temperature oxidation and hot corrosion resistant Al-Cr coating; an Al-rich deposition layer, an Al-Cr alloy layer and a Cr diffusion layer are successively arranged from surface to a titanium aluminum alloy substrate. The content of Al in the Al-rich deposition layer remains the same. The content of Al in the Al-Cr alloy layer gradually reduces outside-to-inside to 70%-100% of the content of Al in the titanium aluminum alloy substrate, and the rest in the Al-Cr alloy layer is Cr. The contents of Cr and Al in the Cr diffusion layer respectively gradually reduces outside-to-inside to same as the contents of Cr and Al in the titanium aluminum alloy substrate, and the rest in the Cr diffusion layer is other elements in the titanium aluminum alloy substrate, and the contents of other elements in the Cr diffusion layer respectively gradually rise to same as the contents of the other elements in the titanium aluminum alloy substrate from zero. The invention also discloses a preparation method of the titanium aluminum alloy surface high temperature oxidation and hot corrosion resistant Al-Cr coating; the titanium aluminum alloy surface high temperature oxidation and hot corrosion resistant Al-Cr coating can give titanium aluminum alloy excellent oxidation resistance and heat resistance corrosion performance under high temperature and long term service conditions, and due to the presence of the diffusion layer of the gradient components, the reliable binding strength and excellent thermal shock resistance can be realized.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
MCrAlY+AlSiY composite coating and preparation technique thereof
InactiveCN101724301AExtended service lifeIncrease contentFireproof paintsVacuum evaporation coatingSurface layerSuperalloy
The invention relates to high-temperature protective coating technology, in particular to an MCrAlY+AlSiY composite coating and a preparation technique thereof. A MCrAlY composite coating, which is rich in Al on an outer layer and rich in Cr on an inner layer and is distributed in a gradient form, is formed by depositing an AlSiY coating on a MCrAlY coating and by using a vacuum diffusion annealing method. The concentration of Al elements on the surface layer of the composite coating is 18 to 22 weight percent, and the concentration of Cr elements on the inner layer is 28 to 45 weight percent. The MCrAlY composite coating, which is rich in Al on the outer layer and rich in Cr on the inner layer and is distributed in a gradient form, is prepared by combination of arc ion plating deposition and the vacuum diffusion annealing. Compared with the existing conventional MCrAlY high-temperature protective coating, the MCrAlY+AlSiY composite coating of the invention effectively improves an A1 storage phase content and Si content in the surface layer of the coating; and the layer rich in Cr is formed on the inner layer of the coating, so the high temperature oxidation resistance and hot-corrosion resistance of the coating are improved, and the service life of the coating can be effectively prolonged. The composite coating and a preparation method thereof are suitable for protecting Ni-based high-temperature alloys.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Ni-Co-Al-Cr-Fe series single crystal high-entropy high-temperature alloy and preparation method thereof
ActiveCN110317990AHigh temperature strengthImprove high temperature mechanical propertiesPolycrystalline material growthAfter-treatment detailsRare-earth elementHigh entropy alloys
The invention discloses a high-entropy high-temperature alloy and a preparation method thereof, and belongs to the field of high-entropy alloys. The alloy comprises the following chemical components of, in percentage by atom, 35%-40% of Ni, 30%-35% of Co, 10%-13% of Al, 5%-10% of Cr, 5%-8.5% of Fe, 1%-2.5% of Ti, 1%-3% of Ta, 0.01%-1% of Mo, 0.01%-1% of W, 0-1% of Re, 0.02%-0.12 % of C, 0.002%-0.015% of B, 0.005%-0.12% of Hf, and 0.05%-0.15% of RE, wherein Al+Ti+Ta is greater than or equal to 14% and less than or equal to 16%, and RE is any one rare earth element of Ce, La and Y. The preparation process of the alloy comprises the following steps of weighing and matching alloy elements according to the molar ratio, putting the alloy elements into a smelting furnace for smelting, carrying out high-temperature refining and casting to obtain an alloy ingot, preparing a (001) oriented single crystal high-entropy high-temperature alloy bar by adopting a high-speed solidification Bridgeman method, and then performing solution treatment and secondary aging treatment on the alloy bar. The prepared alloy bar has good high-temperature strength and thermal corrosion resistance, and is a candidate material of a hot-end part of an aero-engine and an industrial gas turbine.
Owner:UNIV OF SCI & TECH BEIJING
NiCrAIY coating for nickel base high temperature alloy and preparation method thereof
ActiveCN102115866AReduce equipment investment and production costsExtended service lifeSolid state diffusion coatingOxidation resistantCorrosion
The invention relates to a NiCrAIY coating for nickel base high temperature alloy. The NiCrAIY coating for the nickel base high temperature alloy is characterized by comprising the following components by weight: 8-25 percent of Cr, 30-40 percent of Al and 0.3-1.5 percent of Y. The NiCrAIY coating and the preparation method thereof can effectively prolong the service life of high temperature alloy components. The inoxidizability of a matrix can be effectively improved under the environment with the temperature below 1100 DEG C; and the hot corrosion resistance of the matrix can be improved under the Cl-containing hot corrosion environment with the temperature below 900 DEG C. The equipment investment and the production cost of the thermal diffusion preparation method are far lower than the existing methods such as thermal spraying, vacuum physical vapor deposition, and the like. Therefore, the NiCrAIY coating and the preparation method thereof have foreseeable tremendous economic value and social value.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Nickel-based high temperature alloy and manufacturing method thereof
ActiveCN106636760AImprove creep resistanceImprove organizational stabilitySolution treatmentImpurity
The invention discloses a nickel-based high temperature alloy and a manufacturing method thereof. The nickel-based high temperature alloy comprises the following components in percentage by weight: 0.06-0.15% of C, 0.25-0.55% of Si, 0.40-0.95% of Mn, 0.05-3.00% of Fe, 1.0-5.0% of Co, 0.05-0.50% of Al, 0.01-0.09% of Ti, 20.0-24.0% of Cr, 0.01-0.40% of Nb, 0.90-3.0% of Mo, 12.0-15.0% of W, 0.10-1.0% of Re, 0.001-0.009% of B, 0.8-2.0% of Ce, 0.8-1.8% of Ru, 0.3-3.0% of Hf, 2.0-5.0% of Ta, 0.05-0.35% of V and the balance of nickel and inevitable impurities. The nickel-based high temperature alloy disclosed by the invention has the advantages that materials are prepared in a certain proportion, homogenization treatment is carried out on the alloy for three times, high temperature forging is carried out on the alloy, and solution treatment, heat preservation and cooling are carried out; and by adopting the technical scheme of the invention, the strength, fatigue resistance and corrosion resistance of the alloy at high temperature can be effectively improved.
Owner:宁国市华成金研科技有限公司
High-temperature-resistant alloy casting and preparation method thereof
ActiveCN104195474AHigh strengthImprove high temperature creep resistanceFoundry mouldsFoundry coresChemical compositionCarbide
The invention relates to a high-temperature-resistant alloy casting and a preparation method thereof. The alloy casting comprises the following chemical components by mass percent: 0.10% to 0.18% of C, 2.0% to 2.6% of Si, less than or equal to 1% of Mn, less than or equal to 0.045% of P, less than or equal to 0.045% of S, 19% to 23% of Cr, 36% to 40% of Ni, 1.5% to 2.0% of Mo, 0.50% to 0.65% of B, 3.5% to 4.5% of W, 1.0% to 1.4% of Al, 2.0% to 2.6% of Ti, 2% to 3% of Co, 0.05% to 0.15% of Ce and the balance of Fe. The preparation method comprises the following steps of the preparation of a wax mould; the preparation of a mould shell; smelting; and pouring. The as-cast hardness of the alloy casting is HB273-285; and an as-cast metallographic structure of the alloy casting is composed of a fine and small dendritic austenite r, a precipitation strengthening phase r', an intermetallic compound, a metal carbide and a metal boride. The obtained inner core cup casting is strong in high-temperature creep resistance, high-temperature resistance and oxidation resistance and is high in strength and stability under a high-temperature condition, so that the long service life of the casting is realized.
Owner:BAODING FENGFAN PRECISION CASTING
Low-rhenium high-strength thermal-corrosion-resistant nickel-based single-crystal high-temperature alloy and manufacturing method thereof
InactiveCN109371288AExcellent high temperature durabilityLow Re elementPolycrystalline material growthAfter-treatment detailsRheniumChemical composition
The invention discloses a low-rhenium high-strength thermal-corrosion-resistant nickel-based single-crystal high-temperature alloy and a manufacturing method thereof. The alloy comprises the followingchemical components of, in percentage by weight, 9.0-12.0% of Cr, 8.0-11.0% of Co, 0.2-1.5% of Mo, 4.5-7.0% of W, 3.5-5.5% of Al, 2.0-4.0% of Ti, 4.5%-6.5% of Ta, 0.1-0.3% of Hf, 1.2-2.0% of Re, andthe balance Ni. The high-temperature endurance performance is superior to that of the PWA1483 alloy, the Re element is low, and good thermal corrosion resistance is achieved; compared with the existing nickel-based single-crystal high-temperature alloy, the content of the Cr element in the alloy component is relatively high, the alloy component has relatively high thermal corrosion resistance; thealloy has good high-temperature endurance performance, the high-temperature performance is superior to that of PWA1483, and the creep time of the 982 DEG C / 100 Mpa is larger than or equal to 5000h.
Owner:DONGFANG TURBINE CO LTD
Method for improving hot corrosion resistance of Co-Al-W high temperature alloy by utilizing pre-oxidation
The invention discloses a method for improving hot corrosion resistance of Co-Al-W high temperature alloy by utilizing pre-oxidation. The method comprises the following steps: under atmospheric conditions, heating cobalt-based high temperature alloy to 950 DEG C and carrying out oxidation treatment for 50-100 hours to obtain a pre-oxidized layer with the thickness of 2-10 micrometers, wherein thethickness of an Al2O3 layer is 0.5-2 micrometers. The method disclosed by the invention has the advantages that the process is simple and the energy is saved. Compared with un-pre-oxidized alloy, thepre-oxidized alloy has the advantages that the pre-oxidized layer is structurally stable in a corrosive medium and the corrosive medium can be effectively prevented from entering the alloy matrix, sothat the corrosion weight gain of the alloy is significantly reduced by 80% or above and the hot corrosion resistance of the alloy is remarkably enhanced.
Owner:NORTHEASTERN UNIV
Codeposition gradient Ni-base superalloy coating preparation technique
InactiveCN101310972BExtended service lifeExtend service timeVacuum evaporation coatingSputtering coatingSuperalloyDepth direction
The invention mainly relates to the coating technique, in particular to a gradient MCrAlY coating used for protecting high-temperature alloy and a preparation method thereof. The invention adopts a method combining the arc ion plating (AIP) co-deposition and the vacuum diffusion annealing to prepare an MCrAlY coating with the Al element concentration distributed along the depth direction in a gradient way. Compared with the existing conventional MCrAlY high-temperature protective coating, the gradient MCrAlY coating of the invention effectively increases the content of Al memory phase in the coating, so as to improve the high-temperature oxidization resistance and the heat corrosion resistance of the coating, and can effectively prolong the service life of the coating. The MCrAlY gradientcoating and the preparation method of the invention can be applied to the protection of Ni-based and Co-based high-temperature alloys.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Titanium alloy high-temperature oxidation-resistant anti-fretting wear coating material, coating and preparation method
ActiveCN104357792BLow coefficient of sliding frictionImprove high temperature oxidation resistanceMolten spray coatingHexagonal boron nitrideOxidation resistant
Owner:BEIJING GENERAL RES INST OF MINING & METALLURGY +1
Chromium-containing cobalt-based high-temperature alloy and application thereof
The invention discloses a chromium-containing cobalt-based high-temperature alloy and application thereof, and belongs to the field of alloys. The chromium-containing cobalt-based high-temperature alloy consists of the following elements in percentage by atom: (1 to 2) at.% of Cr, (24 to 34) at.% of Ni, (6.5 to 8.5) at.% of Al, (1.5 to 3.5) at.% of Ti and the balance of Co. The sum of the atomic percentage contents of Al and Ti is not more than 10 at.%, and the sum of the atomic percentage contents of Cr, Co, Ni, Al and Ti is 100 at.%. The cobalt-based high-temperature alloy containing the chromium element has high high-temperature corrosion resistance and tensile property, and is applied to high-temperature part materials for aerospace engine manufacturing, industrial gas engine wheel manufacturing and heat exchanger manufacturing.
Owner:东北大学秦皇岛分校
Ni-base superalloy complex gradient coating and preparation technique thereof
InactiveCN101310971BExtended service lifeReduce degradationLayered productsVacuum evaporation coatingSuperalloyDepth direction
The invention mainly relates to the coating technique, in particular to a gradient MCrAlY coating used for protecting high-temperature alloy and a preparation method thereof. The invention prepares an MCrAlY composite gradient coating by adopting the method combining the arc ion plating (AIP) and the diffusion aluminizing. The thickness of an aluminum-rich layer on the surface of the MCrAlY composite coating can be controlled by setting the aluminizing temperature and the period of heat preservation and the Al elements are distributed in a gradient way along the depth direction; in addition, the chemical vapor deposition method used for the aluminizing has the advantages of good uniformity on the aluminum-rich layer and being not affected by the size and shape of a sample. Since the method of direct diffusion is adopted without introducing a weak interface, the MCrAlY high-temperature protective coating can increase the content of Al memory phase to the utmost extent under the condition that the mechanical property of the coating is guaranteed, so as to improve the high-temperature oxidization resistance and the heat corrosion resistance of the coating, and can effectively prolongthe service life of the coating. The MCrAlY composite gradient coating and the preparation method of the invention can be applied to the protection of Ni-based and Co-based high-temperature alloys.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
MCrAlY+AlSiY composite coating and preparation technique thereof
InactiveCN101724301BExtended service lifeIncrease contentFireproof paintsVacuum evaporation coatingIon platingCr element
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
A kind of titanium alloy blade protective coating and preparation method thereof
ActiveCN112663001BHigh bonding strengthImprove compactnessVacuum evaporation coatingSputtering coatingTitanium alloyHot and humid
Owner:NO 59 RES INST OF CHINA ORDNANCE IND +1
A kind of composite magnesia-carbon brick and preparation method thereof
The invention belongs to the field of refractory matters, and in particular relates to a composite magnesia carbon brick and a preparation method thereof. The composite magnesia carbon brick comprises the following raw materials in percentage by weight: 40-50% of regenerated magnesia carbon bricks, 25-40% of fused magnesite, 3-6% of Bonite fine powder, 0.5-2% of metallic aluminum fibers, 2-5% of magnesium-forsterite synthetic sand fine powder, 0.5-1% of asphalt powder, 1-5% of an anti-oxidation additive, 1-10% of graphite and 1-8% of fused quartz, wherein an external binding agent accounts for 2.8-3% of the total weight of the raw materials. The composite magnesia carbon brick is good in high temperature resistance and corrosion resistance, and is relatively good in thermal shock resistance.
Owner:LIAONING ZHONGMEI HLDG
A kind of high temperature resistant alloy material casting and preparation method thereof
ActiveCN104195474BHigh strengthImprove high temperature creep resistanceFoundry mouldsFoundry coresWaxCarbide
The invention relates to a high-temperature-resistant alloy casting and a preparation method thereof. The alloy casting comprises the following chemical components by mass percent: 0.10% to 0.18% of C, 2.0% to 2.6% of Si, less than or equal to 1% of Mn, less than or equal to 0.045% of P, less than or equal to 0.045% of S, 19% to 23% of Cr, 36% to 40% of Ni, 1.5% to 2.0% of Mo, 0.50% to 0.65% of B, 3.5% to 4.5% of W, 1.0% to 1.4% of Al, 2.0% to 2.6% of Ti, 2% to 3% of Co, 0.05% to 0.15% of Ce and the balance of Fe. The preparation method comprises the following steps of the preparation of a wax mould; the preparation of a mould shell; smelting; and pouring. The as-cast hardness of the alloy casting is HB273-285; and an as-cast metallographic structure of the alloy casting is composed of a fine and small dendritic austenite r, a precipitation strengthening phase r', an intermetallic compound, a metal carbide and a metal boride. The obtained inner core cup casting is strong in high-temperature creep resistance, high-temperature resistance and oxidation resistance and is high in strength and stability under a high-temperature condition, so that the long service life of the casting is realized.
Owner:BAODING FENGFAN PRECISION CASTING
A kind of nickel-based alloy material of supercharger nozzle ring blade resistant to 1050 ℃ and its manufacturing method
The invention provides a 1050°C-resistant supercharger nozzle ring blade nickel-based alloy material and a manufacturing method thereof, including C, Mn, Si, S, P, Cr, Fe, Al, Ti, B, Co, Cu, Nb and Ni; based on the mass of the nickel-based alloy material of the blade, the content of C is 0.5-1.0%, the content of Mn is 1.00%, the content of Si is 1.00%, and the content of S is 0.015%. , the P content is 0.02%, the Cr content is 18.0-21.0%, the Fe content is 1.00%, the Al content is 1.5-2.5%, the Ti content is 1.0-2.0%, and the Co The content is 5.0-8.0%, the Cu content is 0.20%, the Nb content is 1.5-2.5%, and the balance is Ni. The VGT blade of the present invention has reduced processing difficulty. After 400h exhaust temperature of 980°C engine reliability test, the blade is intact without deformation after the test, the thickness of the blade oxide layer is less than 10 μm, the increase of the shaft hole matching clearance is less than 100 μm, and the blade shaft and the mounting plate The amount of wear of the shaft hole is within an acceptable range.
Owner:蜂巢蔚领动力科技(江苏)有限公司
A kind of chromium-cobalt-based superalloy and its application
ActiveCN111041281BImprove hot corrosion resistanceImprove tensile propertiesIndustrial gasSuperalloy
Owner:东北大学秦皇岛分校
Nickel-base superalloy
The invention discloses nickel-base superalloy. The nickel-base superalloy is composed of, by weight, 25.5%-28.5% of Cr, 4.0%-6.0% of Co, 2.5%-5.5% of W, 1.0%-3.0% of Mo, 0.2%-1.0% of Al, 2.6%-4.2% of Ti, 3.5%-6.3% of Nb, 1.0%-2.0% of Mn, 2.0%-4.0% of Ta, 0.02%-0.08% of B, 0.5%-1.5% of Co, 1.4%-3.8% of Ru, 0.1%-1.2% of Hf, 0.01%-0.8% of Re, 0.1% of C or less, 0.15% of Si or less, 0.005% of P or less, 0.005% of S or less and the balance Ni.
Owner:无棣向上机械设计服务有限公司
CoCrNiAlY multilayer high-temperature protective coating as well as weight gain control method and preparation method thereof
ActiveCN114525477APrecise control of weight gainImprove high temperature oxidation resistanceVacuum evaporation coatingSputtering coatingOxygen contentTotal thickness
The invention provides a CoCrNiAlY multilayer high-temperature protective coating and a weight gain control method and a preparation method thereof in a high-temperature environment, the coating comprises a plurality of CoCrNiAlY layers and a plurality of Al layers which are alternately deposited on the surface of a matrix, the first CoCrNiAlY layer is deposited on the surface of the matrix, the outermost layer is the Al layer, and the total thickness of the coating is 10.1-11 microns; the preparation method comprises the steps of pretreatment, ion cleaning and CoCrNiAlY / Al multi-layer coating deposition. The weight gain control method comprises the steps that the obtained workpiece is placed in a dry environment at the temperature of 750 DEG C for 60 hours, in the process, the coating is placed in a normal-temperature environment for 1-2 minutes every 20 hours, and the oxygen content in the dry environment is 21 + / -1%. By the adoption of the scheme, the weight increasing condition of the coating used in the high-temperature environment can be accurately controlled, the high-temperature oxidation resistance and the hot corrosion resistance of the coating can be greatly improved, the service life of the coating is prolonged, and meanwhile a large number of chromate spinel phases can be prevented from being generated.
Owner:UNIV OF SCI & TECH LIAONING +1
Processing method capable of improving hot corrosion resistance of diamond grinding material
InactiveCN108774492AExcellent hot corrosion resistanceImprove bindingOther chemical processesRoom temperatureSilicon dioxide
The invention discloses a processing method capable of improving the hot corrosion resistance of a diamond grinding material. The processing method comprises the following steps: S1, after washing a diamond, drying; then immersing the diamond into TiO2 sol; after standing, taking out the diamond; then drying to obtain a material A; S2, putting the material A into phenolic aldehyde sol; after standing, taking out the material A and drying to obtain a material B; S3, putting the material B into silicon dioxide sol; after standing, taking out the material B; then drying, raising the temperature and carrying out heat insulation; then cooling and carrying out heat insulation; then cooling to room temperature. According to the processing method capable of improving the hot corrosion resistance of the diamond grinding material, provided by the invention, the prepared diamond grinding material has good hot corrosion resistance and toughness and the service life of the diamond grinding materialcan be prolonged.
Owner:WUHU CHANGLING DIAMOND TOOL CO LTD
A kind of ni-co-al-cr-fe series single crystal high entropy superalloy and preparation method thereof
ActiveCN110317990BHigh temperature strengthImprove high temperature mechanical propertiesPolycrystalline material growthAfter-treatment detailsRare-earth elementSingle crystal
The invention discloses a high-entropy high-temperature alloy and a preparation method thereof, and belongs to the field of high-entropy alloys. The alloy comprises the following chemical components of, in percentage by atom, 35%-40% of Ni, 30%-35% of Co, 10%-13% of Al, 5%-10% of Cr, 5%-8.5% of Fe, 1%-2.5% of Ti, 1%-3% of Ta, 0.01%-1% of Mo, 0.01%-1% of W, 0-1% of Re, 0.02%-0.12 % of C, 0.002%-0.015% of B, 0.005%-0.12% of Hf, and 0.05%-0.15% of RE, wherein Al+Ti+Ta is greater than or equal to 14% and less than or equal to 16%, and RE is any one rare earth element of Ce, La and Y. The preparation process of the alloy comprises the following steps of weighing and matching alloy elements according to the molar ratio, putting the alloy elements into a smelting furnace for smelting, carrying out high-temperature refining and casting to obtain an alloy ingot, preparing a (001) oriented single crystal high-entropy high-temperature alloy bar by adopting a high-speed solidification Bridgeman method, and then performing solution treatment and secondary aging treatment on the alloy bar. The prepared alloy bar has good high-temperature strength and thermal corrosion resistance, and is a candidate material of a hot-end part of an aero-engine and an industrial gas turbine.
Owner:UNIV OF SCI & TECH BEIJING
A kind of nickel base superalloy and its manufacturing method
ActiveCN106636760BImprove high temperature strengthThe effect of synergistic solid solution strengtheningSolution treatmentCorrosion
Owner:宁国市华成金研科技有限公司
Eutectic alloy, preparation method thereof and application of eutectic alloy as thermal barrier coating bonding layer
ActiveCN114686742AImprove hot corrosion resistancePromotes selective oxidationBlade accessoriesMachines/enginesOxidation resistantBond coat
The invention belongs to the technical field of bonding layer materials, and particularly relates to a eutectic alloy and a preparation method and application thereof. The eutectic alloy provided by the invention comprises an AlCoCrNiPt alloy and an active element which is dispersed in the AlCoCrNiPt alloy, the AlCoCrNiPt alloy is prepared from the following elements in percentage by atomic number: 18 to 23 at. Percent of Al, 18 to 23 at. Percent of Co, 18 to 23 at. Percent of Cr, 15 to 20 at. Percent of Pt and the balance of Ni. The active element accounts for 0.01 to 0.5 at.% of the atomic number of the eutectic alloy; the eutectic alloy comprises a beta (B2) phase and a gamma '(L12) phase. The eutectic alloy contains high-content Pt which occupies nickel sites in NiAl and Ni3Al, so that the Al / Ni ratio of each crystal face of the alloy is increased, selective oxidation of aluminum oxide is promoted, generation of transient oxides such as nickel oxide is inhibited, and the oxidation resistance of the eutectic alloy is improved. The high-content chromium in the eutectic alloy improves the thermal corrosion resistance of the alloy. The beta (B2) and gamma '(L12) double-phase structure provides a large number of channels for rapid diffusion of Al, rapid formation of a single Al2O3 oxidation film is promoted, and therefore the oxidation resistance of the eutectic alloy is improved.
Owner:EAST CHINA UNIV OF SCI & TECH +2
NiCrAIY coating for nickel base high temperature alloy and preparation method thereof
ActiveCN102115866BExtended service lifeImprove antioxidant capacitySolid state diffusion coatingThermal sprayingGas phase
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
High-temperature oxidation-resistant and heat-corrosion-resistant Al-cr coating on the surface of a titanium-aluminum alloy and preparation method thereof
InactiveCN104760349BAccelerated corrosionNo crackVacuum evaporation coatingSputtering coatingAlloy substrateOxidation resistant
The present invention discloses a titanium aluminum alloy surface high temperature oxidation and hot corrosion resistant Al-Cr coating; an Al-rich deposition layer, an Al-Cr alloy layer and a Cr diffusion layer are successively arranged from surface to a titanium aluminum alloy substrate. The content of Al in the Al-rich deposition layer remains the same. The content of Al in the Al-Cr alloy layer gradually reduces outside-to-inside to 70%-100% of the content of Al in the titanium aluminum alloy substrate, and the rest in the Al-Cr alloy layer is Cr. The contents of Cr and Al in the Cr diffusion layer respectively gradually reduces outside-to-inside to same as the contents of Cr and Al in the titanium aluminum alloy substrate, and the rest in the Cr diffusion layer is other elements in the titanium aluminum alloy substrate, and the contents of other elements in the Cr diffusion layer respectively gradually rise to same as the contents of the other elements in the titanium aluminum alloy substrate from zero. The invention also discloses a preparation method of the titanium aluminum alloy surface high temperature oxidation and hot corrosion resistant Al-Cr coating; the titanium aluminum alloy surface high temperature oxidation and hot corrosion resistant Al-Cr coating can give titanium aluminum alloy excellent oxidation resistance and heat resistance corrosion performance under high temperature and long term service conditions, and due to the presence of the diffusion layer of the gradient components, the reliable binding strength and excellent thermal shock resistance can be realized.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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