52 results about "Al content" patented technology

The invention belongs to the technical field of metal materials, and relates to a CoNiVAlX (x is greater than or equal to 0 and less than or equal to 0.5) multi-principal-element heterostructure entropy alloy system and a preparation method thereof. The chemical composition (atomic percent) of the alloy contains Co, Ni, V, Al and a trace regulator, flexible matching of strength and toughness is realized in a wide temperature range of-263 DEG C to 800 DEG C by regulating the Al content and a thermal mechanical treatment process, and various mechanical states such as'high ductility-medium strength 'and'high strength-medium ductility' can be obtained; the preparation process is based on a mature metallurgical technology and does not depend on special equipment, and large-size stable preparation can be achieved. Tests prove that the alloy system is wide in toughness and adjustable, the toughness balance in a wide temperature range is realized, the application requirements in an extreme environment are met, and the alloy system has a good industrial popularization prospect.

This invention discloses a continuous gradient Cr-Al coating for zirconium alloy cladding and its preparation method, belonging to the field of nuclear zirconium alloy coating technology. The method of this invention first pre-activates the zirconium alloy cladding surface with Cr ions, followed by depositing a Cr-Al coating with a continuous gradient composition. This process involves maintaining the bias voltage of the Cr target source at 3000-5000V, and increasing the bias voltage of the Al target source from 0V to 3000-5000V in 3-15 increments, with an interval of 20-140 minutes between each increment and an increment of 200-1000V. This results in a region where the Cr content continuously decreases and the Al content continuously increases from the interface between the Cr-Al coating and the Cr-ion-preactivated zirconium alloy cladding surface to the outer surface of the Cr-Al coating. This method solves the problem of existing methods easily leading to damage to the internal structure of the coating.

According to an embodiment of the present invention, the non-oriented electrical steel sheet comprises, by weight %, 1.5 to 5.0% Si, 0.1 to 2.0% Al, 0.1 to 2.0% Mn, 0.001 to 0.08% Sn, 0.001 to 0.08% Sb and 0.0002 to 0.0007% B, with the balance being Fe and unavoidable impurities. When the elemental content is measured along the thickness direction of the steel sheet in a surface portion ranging from the surface to the interior in a range of 0.3 to 1 μm, the weight ratio of the maximum Si content to the maximum Al content is 25 or less.

Provided is a method for producing a TiAl-based alloy by sintering a mixed raw material powder comprising a Ti powder and an Al powder as main raw materials, the method being characterized in that: the TiAl-based alloy is produced by heating at a heating rate of 10 DEG C or less per minute within a predetermined temperature range between 550 DEG C and 750 DEG C; or the isothermal holding time is set while the temperature is increased by stages, and the alloy with the Al content ratio at any 0.5 mm * 0.5 mm section in the sintered body being within + / -3 at% of the Al component ratio in the mixed raw material powder is obtained.

Provided is a plated steel sheet provided with a base material steel sheet and a plating layer formed on the surface of the base material steel sheet, the plating layer having a prescribed chemical composition, the plating layer comprising an Fe-Al phase located at the interface with the base material steel sheet and a main layer located on the Fe-Al phase, and in the cross section of the main layer, the thickness of the Fe-Al phase is greater than that of the main layer, and the thickness of the Fe-Al phase is greater than that of the main layer. The surface area ratio of an Mg-Al-Zn-Si intermetallic compound phase having an Al content of 10% by mass or more is 0.010% or more, the Fe-Al phase contains, in mass%, 3.0-15.0% of Si and 2.0-15.0% of Zn, and the amount of the plating layer deposited on each surface is 20 g / m2 or more.

The application provides 800MPa-grade hot-dip aluminized silicon high-hole-expanding multiphase steel and a preparation method thereof. The composition of the steel plate is as follows in terms of percentage by weight: C: 0.06% to 0.09%, Si: 0.1% to 0.4%, Mn: 1.8% to 2.5%, Cr: 0.1% to 0.4%, Mo: 0.05% to 0.3%, Ti: 0.01% to 0.03%, Nb: 0.01% to 0.03%, P: less than or equal to 0.02%, S: less than or equal to 0.005%, 1 / 3: less than or equal to Mo / Cr: less than or equal to 2 / 3, 2.2%: less than or equal to Mn+Cr: less than or equal to 2.8%, and the balance of Fe and inevitable impurities. The chemical composition of the coating includes the following components in terms of percentage by weight: Al content: 88% to 93%, and Si content: 7% to 12%. The production method of the steel plate comprises a series of processes such as smelting, hot rolling, pickling, cold rolling, continuous annealing and aluminized silicon plating, and the structure of the steel plate comprises ferrite, bainite and martensite. In terms of the planar area method, the ferrite content is 18% to 35%, the bainite content is 35% to 62%, and the martensite content is 10% to 40%. The mechanical properties of the steel plate of the application are as follows: tensile strength is more than 800MPa, yield strength is 620MPa to 750MPa, elongation is greater than 14%, and the hole-expanding value is more than 50%, so that the steel plate has good strength and plasticity and formability, and meanwhile, the hole-expanding performance is excellent.

The present invention provides a steel material that provides high strength and excellent low-temperature toughness for machine structural components. The steel material of this disclosure has a chemical composition, by mass%, of C: 0.20-0.48%, Si: 0.20-1.30%, Mn: 0.80-2.00%, P: 0.050% or less, S: 0.010-0.090%, Cr: 0.05-0.50%, V: 0.05-0.30%, Ti: 0.0001-0.0055%, Al: 0.005-0.050%, N: 0.003-0.030%, Ca: 0.0001-0.0050%, and O: 0.0030% or less, with the remainder being Fe and impurities, and has a number density ND of coarse inclusions with an equivalent circle diameter of 3.0 μm or more of 0.70 inclusions / mm². 2 The following conditions must be met: Among the coarse inclusions, the number percentage NR of coarse specific inclusions that satisfy formula (1) in terms of mass %, such as Mn content, Al content, Ti content, and V content, is 75% or less. (Mn+Al) / (Ti+V)<0.30 (1)

A zinc-plated steel sheet for hot stamping includes a steel sheet having a predetermined chemical composition and a zinc plating film disposed on the steel sheet. In the zinc plating film, the plating adhesion amount is 15.0 g / m2 or more and less than 40.0 g / m2, the Fe concentration is 1.5 mass % or more and 8.0 mass % or less, the Al content is 100 mg / m2 or more and 400 mg / m2 or less, the Al concentration is 0.50 mass % or more and 3.00 mass % or less, and the remainder consists of Zn and impurities.

This application provides a steel material with ultra-high strength of 2000MPa and above, a hot gas expansion tube component, a welded pipe, and a manufacturing process. The component, welded pipe, and steel material, by mass percentage, contain: C: 0.35~0.50%, Mn: 0.20~1.20%, Si: 0.25~0.85%, Cr: 0.20~0.70%, Al: 0.25~0.65%; the sum of Si, Cr, and Al content is 1.0~2.2%, and (Si+Cr) / Al is 2.0~3.5; the thickness t, alloying elements, and critical cooling rate v of the component, welded pipe, or steel material are also specified. C Satisfies the formula: , v C With a temperature range of 10~21℃ / s, the hot gas expansion tube component of this invention possesses ultra-high strength and good toughness.

The invention relates to the technical field of high-temperature alloy metallurgy preparation, in particular to an additive manufacturing nickel-based high-temperature alloy with high Al and Ti content and a preparation method of the additive manufacturing nickel-based high-temperature alloy. The additive manufacturing nickel-based high-temperature alloy comprises the following components in percentage by weight: 17-19% of Cr, 5-8% of Co, 5-7% of W, 3.5-4.5% of Mo, 3-5% of Al, 1-1.6% of Ti and the balance of Ni. According to the method, firstly, the Al content in a nickel-based superalloy system is adjusted, alloy powder for additive manufacturing is prepared, then fusion covering of the alloy is conducted, finally heat treatment is conducted, Al is introduced into the nickel-based superalloy through ball milling, the content is designed, the tensile strength of the obtained additive manufacturing nickel-based superalloy at 900 DEG C can reach 570 MPa or above, and the performance is improved by 70% or above. Meanwhile, the component design alloy is suitable for additive manufacturing, no crack exists in an alloy sample for metallographic observation, and manufacturing defects are reduced.

The application discloses high-sulfur steel, including components and mass percentage: C: 0.67%-0.73%, Si: 0.15%-0.25%, Mn: 0.45%-0.65%, P: ≤0.045%, S: 0.060%-0.070%, Cr: 0.10%-0.20%, Mo: ≤0.06%, Ni: ≤0.20%, V: 0.03%-0.04%, Al: ≤0.03%, N: 0.012%-0.016%, the balance is Fe and impurities.The application provides a preparation process of high-sulfur steel, including the following steps: step S1, converter process; step S2, refining process; step S3, VD process; step S4, continuous casting process.The beneficial effect is that the Al content in the steel is controlled at a relatively high level to offset the secondary oxidation caused by the addition of quartz sand at the end of the refining, that is, the low oxygen state in the steel is ensured by Al.

This invention discloses an analytical method for Zr and Al content in tungsten-copper alloys based on ICP-OES, belonging to the technical field of elemental content analysis methods. The analytical method includes: pretreating the tungsten-copper alloy sample with concentrated nitric acid, hydrofluoric acid, hydrogen peroxide, and boric acid to obtain an analytical solution, and simultaneously preparing a blank analytical solution; preparing a series of standard solutions using a mixed aluminum and zirconium standard solution; and sequentially measuring the mass concentrations of zirconium and aluminum in the analytical solution using ICP-OES. This invention fills the gap in current standards for Zr and Al detection in tungsten-copper alloys, providing an accurate and efficient analytical method for material development, production quality control, and performance evaluation.

This invention discloses a multi-structured coating, its preparation method, and its application. The coating comprises a TiAlN substrate, an AlTiN gradient layer with increasing Al content, an AlTiN / TiSiN nanolayer, and a TiSiN nanocomposite layer, sequentially connected. The substrate is connected to the substrate. The AlTiN gradient layer with increasing Al content is immediately connected to the TiAlN substrate. The AlTiN / TiSiN nanolayer is a nano-multilayer structure composed of alternating AlTiN and TiSiN layers. The TiSiN layer is a nanocomposite structure composed of nanocrystalline embedded amorphous substrate. The total thickness of the coating is controlled between 1.0 and 6.0 μm. The multi-structured coating exhibits a bonding strength of 65–120 N with the substrate, a nanohardness of 32–35 GPa, and a fracture toughness of 5.9–10 MPa·m. 1 / 2 It has strong toughness and corrosion resistance, and high bonding strength. Its coated tools have a cutting life that is much longer than that of traditional AlTiN coated tools.

A sliding member may include a metallic base, at least one intermediate bonding layer disposed on the metallic base, and a multilayer protective coating disposed on the intermediate bonding layer. The at least one intermediate bonding layer may be composed of at least one metal. The multilayer protective coating may include a plurality of CrAlN layers and a plurality of Cr(Al)N layers arranged in an alternating manner. The multilayer protective coating may include a plurality of periodicity layer groups, each of which may be defined by a CrAlN layer and an adjacent Cr(Al)N layer. The plurality of CrAlN layers may have a higher Al content than the plurality of Cr(Al)N layers. A thickness ratio of the CrAlN layer to the Cr(Al)N layer in each periodicity layer group may be from 1 to 10. The multilayer protective coating may have a total Al content of 15 to 40 atom-%.

The invention provides a preparation and analysis method of a hot-dip Zn-Al-Mg alloy coating, and belongs to the technical field of metal surface coating. The preparation method comprises the steps of steel strip pretreatment, hot dipping and post-plating treatment, and an alloy plating layer with a uniform structure is obtained by controlling parameters of all working procedures; the invention also provides a matched coating analysis method which comprises the following steps: performing phase analysis by adopting an X-ray diffractometer, and performing quantitative characterization on the microscopic structure of the coating by adopting a scanning electron microscope in combination with image analysis software. The corrosion resistance of the coating is remarkably improved by increasing the content of Al and cooperatively adding Mg and Si, the microstructure characteristics of the coating are revealed through analysis, a theoretical basis is provided for component optimization and process control, and industrial application prospects are achieved.

The present invention provides a technique for improving the yield of Al with no increase in the cost of vacuum refining. In addition, a method for manufacturing steel with less variation in the amount of Al is provided. A method for deoxidizing and refining molten steel using a vacuum refining apparatus, in which an Al-containing substance is added to the molten steel in a vacuum tank, and the temperature change ΔT1 and ΔT2 of the molten steel in the Al deoxidation satisfy the following equation (1). The Al content of the Al-containing substance is preferably 30 to 80 mass%. The method for deoxidizing and refining molten steel described above as a deoxidation step enables the manufacture of steel in which the Al concentration in the steel after the deoxidation step is 0.02 mass% or less. ΔT1 + ΔT2 < 0 ··· (1) ΔT1 represents the temperature increase due to the heat of oxidation of Al, and ΔT2 represents the temperature decrease due to the sensible heat of the Al-containing substance.

The invention discloses a method for producing ultra-high clean bearing steel based on residual calcium content control, which specifically comprises the following steps: calculating the maximum value of the Al content in molten steel through a formula according to the O content and Ca content in the molten steel in an LF (ladle furnace) refining process, and then adding a proper amount of aluminum wire to enable the Al content in the molten steel to be less than or equal to the calculated maximum value of the Al content; the calculation formula is as follows: T [Al] = (2.5 * T [O]-77) * ln [(T [Ca]-0.35 T [O]) / (-0.7 T [O] + 1)]; t [Al], T [O] and T [Ca] are the maximum value of the Al content, the O content and the Ca content in the molten steel in the refining process in sequence, and the unit is ppm. By means of the method, production of the ultra-high-cleanliness high-carbon-chromium bearing steel with the T. [O] smaller than or equal to 5 ppm can be achieved, the coarse inclusion D in the bearing steel is smaller than or equal to 0.5 grade, and the coarse inclusion D in the bearing steel is smaller than or equal to 0.5 grade.

Provided is a steel material providing high strength and excellent low-temperature toughness in a component for a machine structure. The steel material according to the present disclosure has a chemical composition containing, in terms of mass%, 0.20%-0.48% of C, 0.20%-1.30% of Si, 0.80%-2.00% of Mn, 0.050% or less of P, 0.010%-0.090% of S, 0.05%-0.50% of Cr, 0.05%-0.30% of V, 0.0001%-0.0055% of Ti, 0.005%-0.050% of Al, 0.003%-0.030% of N, 0.0001%-0.0050% of Ca, and 0.0030% or less of O, with the balance being Fe and impurities, wherein: the number density ND of coarse inclusions having an equivalent circle diameter of 3.0 μm or more is 0.70 or less per 1 mm2; and the number ratio NR of coarse specific inclusions in which the Mn content, the Al content, the Ti content, and the V content in terms of mass% satisfy formula (1) among the coarse inclusions is 75% or less.　(1): (Mn + Al) / (Ti + V) < 0.30

The application discloses a high-strength and high-toughness corrosion-resistant die-casting magnesium alloy suitable for large and complex thin-wall structural parts, a production process and application thereof, and belongs to the technical field of metal materials. The magnesium alloy comprises the following components in percentage by mass: 6.5-8% of Al, 0.2-0.4% of Mn, 0.05-0.15% of Ca, 0.05-0.2% of Si, 0.01-0.08% of RE, the balance of Mg and inevitable impurities, and RE is selected from Ce, La, Sm or Y. The Al content is controlled in the critical transition interval 6.5-8%, trace Ca, Si and RE elements are added, high-pressure die-casting process parameters (injection speed 4-6 m / s, casting pressure 30-80 MPa, mold temperature 150-250 DEG C, wall thickness 2-5 mm) are combined, the 'high nucleation rate + inhibition of growth' mechanism under the condition of rapid solidification is utilized, the beta-Mg17Al12 phase is distributed in the form of fine and dispersed particles instead of continuous network distribution, and the synergistic optimization of strength and plasticity is realized. The alloy has high fluidity, excellent corrosion resistance and thermal cracking resistance, and is especially suitable for large and complex thin-wall die-casting structural parts such as automobile bodies.

In the present invention, a mold powder for continuous casting that is effective in preventing operational troubles and quality deterioration caused by longitudinal cracks of slabs in continuous casting of hypo-peritectic steel is provided at low cost. The mold powder for continuous casting satisfies a basicity expressed by the mass ratio of the content of Ca in terms of CaO to the content of Si in terms of SiO2, i.e. (%CaO) / (%SiO2), of 1.30 to 1.60, an Al content in terms of Al2O3 of 0 mass% to 3.0 mass%, an Mg content in terms of MgO of 1.0 mass% to 3.0 mass%, an F content of 8.0 mass% to 12.0 mass%, an Na content in terms of Na2O of more than 5.0 mass% and 9.0 mass% or less, and an Mn content in terms of MnO of 2.0 mass% to 5.0 mass%.

This invention discloses a wide strip of non-oriented silicon steel and its preparation method. The preparation method includes: preparing a single-layer cold-rolled coil with a width of 800-1300 mm and a thickness of 0.20-0.50 mm by steelmaking, billet casting, hot rolling, pickling, and cold rolling; stacking two single-layer cold-rolled coils of the same thickness and width, separating them by a high-temperature resistant insulating coating to form a laminate; the difference in Si content, Al content, and Mn content between the two single-layer cold-rolled coils does not exceed 0.20%, and the difference in P content does not exceed 0.02%; rolling the laminate on a single-stand rolling mill for 2-3 passes with a total reduction rate of 30%-50% to obtain a double-layer cold-rolled coil with a total thickness of 0.20-0.50 mm; and subjecting the obtained double-layer cold-rolled coil to continuous annealing, coating, and finishing to obtain the finished non-oriented silicon steel product.

The invention discloses a method for determining the molecular ratio of an aluminum oxide electrolyte based on an all-element method. The method comprises the following steps: preparing a sample, analyzing aluminum oxide, dissolving the sample, and determining the content of all elements by an ICP (Inductively Coupled Plasma) method. Measuring the content of free Al2O3 in the electrolyte sample; performing ICP analysis on the electrolyte sample acidolysis solution to obtain an all-element analysis value; calculating the NaF content in the electrolyte sample according to the Na content of the sample; calculating the content of free AlF3 according to the total Al content and Al2O3 content of the sample; and calculating the molecular ratio R of the electrolyte according to the content values of NaF and AlF3 elements. By adopting the method, no solid impurity interference exists in the solution, the analysis solution is clear, color reaction is easy to judge, no red complex is generated to influence end-point color judgment, the parallel determination result is stable, the determination value fluctuation is small, and the method is closer to the actual value of a sample.

The invention belongs to the technical field of metallurgy, and particularly relates to a method for slowing down taphole channel chambering in the blast furnace tapping process, which comprises the following steps of: (1) improving stokehole equipment: 1, optimizing the material of a tapping machine drill rod; 2, optimizing the connection mode of a drill bit and a drill rod of the tapping machine; 3, the impact power of the tapping machine and the rock drill is increased, specifically, the impact power of the tapping machine and the rock drill is increased from 350-430 J to 570-650 J, and the tapping capacity of the tapping machine is improved; (2) improving the quality of the stemming and optimizing the pouring period of the iron runner: 1, improving the quality of the stemming; 2, the iron runner pouring period is optimized; and (3) improving the furnace process: 1, adopting a one-time opening technology; 2, a nitrogen and water cooling atomization drill bit technology is adopted; and 3, the stokehole operation is optimized. According to the method, damage to the iron notch channel caused by deformation and breakage in the opening process of the drilling rod of the tapping machine is reduced, the continuity of the opening process is high, bit shank breakage is avoided, loss of the iron notch to the iron notch channel is reduced, the drilling efficiency is improved, stokehole consumption is reduced, slag iron is smoothly discharged, hole reaming of the iron notch channel is slowed down, and the stability of the furnace condition is improved.

The application discloses a method for controlling large-size liquid inclusions in a LF refining stage, comprising the following steps: S1: obtaining the O content, Ca content and Al content in molten steel in the LF refining process; S2: calculating the large-size liquid inclusion index Y of the molten steel by using formula (I); and S3: controlling the O, Ca and Al contents according to the calculated large-size liquid inclusion index Y. According to the inclusion control characteristics of multiple steel types, the O, Ca and Al contents are accurately controlled in the refining stage, 100% of the large-particle spherical oxide Ds-type inclusions are controlled to be less than 19 microns, the Ds-type inclusion is less than or equal to 0.5 level in the GB / T 10561-2023 'Standard Grading Diagram Microscopic Test Method for Determining Nonmetallic Inclusion Content in Steel', and the large-size liquid inclusion is accurately controlled.

To provide a surface-treated steel material that suppresses the formation of red rust in unplated areas (having excellent resistance to red rust). [Solution] A surface-treated steel material comprising a steel material, a plating layer containing Zn, and a film containing P, Si, Al, and Mg, wherein when the cross-section of the film is analyzed using TEM-EDS for P content, Al content, Mg content, and Si content in mass%, the average value of P / Al, which is the ratio of the P content to the Al content, is 0.010 to 10.000, the average value of Mg / Si, which is the ratio of the Mg content to the Si content, is 0.025 to 1.000, and when the region in the film where the P concentration is 1.0 mass% or more is defined as a P-enriched region and the region where the Si concentration is 1.0 mass% or more is defined as a Si-enriched region, the area ratio of the P-enriched region is 1.00 to 30.00%, the area ratio of the Si-enriched region is 1.00 to 30.00%, and the area ratio of cracks present on the surface of the film is less than 0.10%.

The invention discloses a rare earth CuNiAl alloy and a preparation method and application thereof, and the rare earth CuNiAl alloy comprises the following components in percentage by weight: 50 to 60 percent of Cu, 35 to 45 percent of Ni, 3 to 8 percent of Al and 0.01 to 0.16 percent of La. The Al blocks and the La particles are smelted into Al-La intermediate alloy through vacuum induction suspension; cu, Ni, Al and Al-La intermediate alloys are placed in a vacuum medium-frequency induction melting furnace, vacuumizing is carried out, inert gas is introduced, and casting, solid solution and aging treatment are carried out after heating reaction. The material has the characteristics that the porosity is less than 0.5%, the normal-temperature hardness is greater than or equal to 280HV, the hardness retention rate at 600 DEG C is greater than 70%, and the conductivity is greater than or equal to 5.8% IACS (International Annealed Copper Standard), and is suitable for high-temperature, high-wear-resistant and corrosion-resistant scenes such as aerospace engine parts, ocean engineering pipelines and the like. Good industrial application prospects are realized.

The application discloses a nickel-chromium-aluminum-yttrium transition layer with gradient change of aluminum component on a nickel-based alloy, and belongs to the technical field of thin film sensor design and production. The transition layer comprises a NiCrAlY film and a thermally grown alpha-Al2O3 layer. The Al content in the NiCrAlY film gradually increases from bottom to top, and the NiCrAlY film is obtained by double-target sputtering of two NiCrAlY targets with different Al contents. The thermally grown alpha-Al2O3 layer is obtained by vacuum aluminum deposition and thermal oxidation. The NiCrAlY layer has sufficient Al elements on the surface, and sufficient Al can be enriched on the surface of the NiCrAlY layer by using shorter annealing time and lower annealing temperature, so that the damage of the substrate caused by long heat treatment time and high temperature is reduced; the generation of flat, dense and sufficient-thickness alpha-Al2O3 in the subsequent oxidation process is facilitated, and the subsequent growth of an oxide insulating layer with good performance is facilitated.

A ceramic substrate according to the present invention comprises Al, Zr, and Y, wherein: the Al content is 75-90 mass% in terms of Al2O3; the Zr content is 5-14 mass% in terms of ZrO2; the Y content is 0.3-2.0 mass% in terms of Y2O3; alumina (Al2O3) particles and yttria partially stabilized zirconia (YSZ) particles are contained as a crystal phase; and the average distance between YSZ particles that are positioned closest to each other is 0.50-1.20 μm.

An Al—Si coated press hardening component, wherein the Al—Si coating comprises a low-Al content ferrite layer with an Al content of less than 5 wt % and a thickness of greater than 5 μm, and having a maximum bending angle of the Al—Si coated press hardening component is greater than 65°. The thickness of the tough low-Al content ferrite layer in the Al—Si coating after hot stamping, reaching 5-100 μm, by improving the hot stamping process, so that the formation or propagation of cracks on the surface or the coating is effectively prevented, and the bendability of the pre-coated steel after hot stamping is improved. At the same time, the hot stamping process of the present invention can take into account or optimize the microstructure of the steel substrate to further improve the bendability and tensile property of the whole material.

This invention discloses a double-layer adhesive alloy for high-temperature alloys and its application, belonging to the field of material surface modification and coating technology. The bottom layer of the double-layer adhesive alloy has the following composition by mass percentage: Al 8.9%-9.4%, Co 7.5%-8.0%, W 4.9%-5.4%, Ta 4.4%-4.9%, Cr 2.6%-3.1%, Ti 1.4%-1.6%, Mo ≤0.2wt%, Hf ≤0.2wt%, with the remainder being Ni. The top layer of the double-layer adhesive alloy has the following composition by mass percentage: Al 19.0%-19.5%, Co 10.0%-10.5%, Cr 6.9%-7.4%, Ta 0.8%-1.0%, Ti 0.2%-0.3%, with the remainder being Ni. This invention targets nickel-based superalloys and designs a double-layer adhesive layer structure. By increasing the Al content in the adhesive layer and combining the concept of phase composition matching and compatibility with the matrix, the coating composition is designed. Under the premise of increasing the Al content in the alloy, the elemental composition of the γ' phase and β phase is determined, and the composition of the double-layer adhesive layer is finally designed.