60 results about "Cu element" patented technology

The present invention relates to the technical field of other processing of metals. Disclosed are a free-machining titanium material and a preparation process therefor. The free-machining titanium material comprises: a matrix component group and free-machining component groups, wherein at least one of the free-machining component groups is added to the matrix component group; the matrix component group comprises the following components in percentage by mass: 0-1.0% of Fe, 0-0.08% of N, 0-0.02% of H, 0-0.50% of O, 0-8.0% of Al, 0-15.0% of V, and the balance being titanium and inevitable impurities; and the free-machining component groups are an RE element and S element group, a Cu element and S element group, a Zr element group, a C element group, a B element group, and an Mg element group, respectively. The preparation process involves producing the described free-machining titanium material by using any one of the following three methods: vacuum arc remelting, vacuum floating melting, and powder metallurgy. The present invention solves the technical problem of how to further improve the machinability of titanium materials.

The invention relates to the technical field of aluminum alloy materials and casting, and provides an aluminum alloy for liquid die forging, a preparation method of the aluminum alloy and liquid die forging workpiece manufacturing application, and the aluminum alloy for liquid die forging comprises, by mass, 6.0%-10.0% of Si, 0.3%-1.0% of Mg, 0.05%-0.8% of Mn, 0.05%-0.6% of Cr, 0.005%-0.05% of Ga, 0.01%-0.2% of Hf, 0.01%-0.2% of W, 0.03%-0.4% of Y, 0.03%-0.4% of Nd, 0.03%-0.4% of Er and the balance aluminum. The aluminum alloy comprises the following components in percentage by weight: less than or equal to 1.0% of Fe, less than or equal to 0.25% of Hf and W elements, 0.2-0.8% of Y, Nd and Er elements, less than or equal to 0.03% of other inevitable single impurity elements, less than or equal to 0.15% of impurity elements and the balance of aluminum. The aluminum alloy for liquid die forging effectively solves the problems that the formability and the mechanical property of an existing material are difficult to consider at the same time and the cost controllability is poor, and has remarkable comprehensive advantages.

The invention provides a method for testing the copper diffusion depth of an aluminum alloy clad aluminum plate. The method comprises the following steps: pretreating the aluminum alloy clad aluminum plate; and carrying out line scanning on the pretreated aluminum alloy clad aluminum plate by utilizing an energy disperse spectroscopy, and obtaining the copper diffusion depth of the aluminum alloy clad aluminum plate according to an obtained Cu element curve. According to the test method provided by the invention, the concentration distribution gradient of the Cu element in the coating layer of the aluminum alloy coated aluminum plate is reflected by utilizing energy disperse spectroscopy line scanning, the influence caused by test operations such as etching is avoided, the copper diffusion depth of the coating layer can be truly reflected, and the accuracy of copper diffusion depth data is ensured.

The application relates to a feed for metal injection molding, a preparation method of the feed and a metal product, wherein the preparation method of the feed comprises the following steps: S1, obtaining the following components according to weight parts: 40-50 parts of Fe elements, 2-8 parts of Ni elements, 20-25 parts of Cr elements, 20-25 parts of Co elements, 2-8 parts of Mo elements, 2-8 parts of Cu elements, 0.1-3 parts of Si elements, 1-3 parts of Mn elements, mixing and then heating to melt the material, and then adopting a high-pressure water-gas combined atomization method to obtain mixed powder; S2, obtaining a forming agent; S3, preheating the mixed powder obtained in S1 under vacuum conditions, then adding the forming agent into the mixed powder for mixing, and then performing plasticizing extrusion granulation to prepare the feed. The feed can meet the size precision requirements of MIM injection, green compact degreasing sintering and related post-process machining, the existing MIM materials on the market cannot simultaneously meet the problem of high polishable hardness, and the obtained metal product has the comprehensive advantages of appearance and hardness.

The invention belongs to the technical field of superconducting materials, and particularly relates to a functional gradient barrier layer and application thereof. Chemical components of the functional gradient barrier layer change in a gradient mode in the thickness direction of the functional gradient barrier layer, the functional gradient barrier layer is a Nb-rich element area close to one side area of the NbTi superconducting core wire, and the atomic percent of Nb elements is larger than or equal to 90%; in a region close to one side of the Cu substrate, the functional gradient barrier layer is a Cu element-rich region or a Cu element-containing alloy region, and the atomic percent of the Cu element is greater than or equal to 95%; and a gradient layer with continuous transition of chemical components is arranged between the Nb-element-rich region and the Cu-element-rich region or the Cu-element-containing alloy region.

The application provides a copper alloy, a preparation method thereof and an elastic electronic component, and relates to the technical field of copper alloys.The copper alloy comprises the following elements in percentage by mass: the content of Ti element is 2.70-4.20%, the content of Y element is 0.010-0.030%, the content of La element is 0.010-0.030%, the content of B element is 0.010-0.020%, the total content of unavoidable impurities is less than or equal to 0.01%, and the balance is Cu element and M element; wherein, the M element is Fe element or P element, when the M element is Fe element, the content of Fe element is 0.28-0.45%, and when the M element is P element, the content of P element is 0.05-0.15%. The copper alloy has excellent tensile strength, hardness, elastic modulus and conductivity.

The invention discloses a design method and application of a high-toughness Al-Cu series cast aluminum alloy, and relates to the technical field of cast aluminum alloys, the design method comprises the steps that alloy components are limited, and a variable temperature aging process is adopted, the alloy components comprise the Cu element, the Mg element and the Zn element; si element, Sn element and Al element; the variable-temperature aging process is executed after the alloy is subjected to conventional solution treatment, and comprises the following steps: carrying out high-temperature nucleation for the first time; first-time low-temperature growth; carrying out secondary high-temperature nucleation; and carrying out secondary low-temperature growth. Through the variable temperature aging process, nucleation and growth are decoupled, a high-density fine precipitated phase is obtained, the contradiction that strength and toughness of a traditional process are difficult to obtain at the same time is solved, and high-toughness matching is achieved.

The invention belongs to the technical field of composite aluminum alloy, and discloses an aluminum alloy composite board and a corrosion-resistant aluminum alloy composite board. The aluminum alloy composite board is of a double-layer structure which comprises a core layer and a corrosion-resistant layer; the core layer comprises a Si element, a Fe element, a Cu element, a Mn element and a Mg element, and the anti-corrosion layer comprises a Zn element, the Si element and the Fe element; the corrosion-resistant aluminum alloy composite board is obtained by carrying out zinc impregnation treatment on the aluminum alloy composite board. And after zinc impregnation treatment, the difference value between the potential of a Zn-element-free diffusion area of the anti-corrosion layer and the potential of the innermost layer of the core layer is smaller than or equal to 150 mV. The corrosion-resistant aluminum alloy composite board shows excellent layered corrosion in a corrosion environment.

The invention provides a 7xxx series aluminum alloy plate strip for anodic oxidation with a high recovery ratio and a preparation method of the 7xxx series aluminum alloy plate strip. The 7xxx series aluminum alloy plate strip comprises the following elements of 0.06%-0.12% of Si element, 0.10%-0.25% of Fe element, 4.5%-5.5% of Zn element, 2.0%-3.0% of Mg element, 1.2%-2.0% of Cu element, 0.05%-0.15% of Mn element, 0.10%-0.15% of Er element, 0.10%-0.12% of Zr element, 0%-0.03% of Ti element and the balance aluminum element. The aluminum alloy plate strip is prepared through the steps of reclaimed material grading pretreatment, low-liquid-level semi-continuous casting, multi-stage homogenizing heat treatment, hot rolling, cold rolling, solid solution, pre-stretching, two-stage aging and the like. Through joint optimization of material components and the process, the finished plate strip has excellent mechanical performance, an oxidation film is uniform in color and luster, and salt mist resistance, friction resistance and the like are achieved.

The application provides a copper-based alloy material and a preparation method and application thereof, and belongs to the technical field of copper-based alloy materials.The copper-based alloy material comprises Ag elements, Zr elements, Cu elements and inevitable impurity elements; the weight content of the Ag elements is 0.001-0.045%, the weight content of the Zr elements is 0.001-0.01%, the total weight content of the inevitable impurity elements is less than or equal to 0.001%, and the balance is the Cu elements.The application limits the content of the Ag elements, the Zr elements and the inevitable impurity elements in the copper-based alloy material, not only further improves the softening resistance of the copper-based alloy material, but also simultaneously makes the electric conductivity and the hardness of the copper-based alloy material in a better range, realizes the comprehensive improvement of the performance of the copper-based alloy material.In addition, the control of the content of the above elements in the copper-based alloy material also realizes the control of the cost of the copper-based alloy material, and ensures the maximization of the economic benefits of the copper-based alloy material.

The invention discloses low-density corrosion-resisting steel containing copper Fe-Mn-Al-C and a preparation method of the low-density corrosion-resisting steel, and belongs to the technical field of metal material preparation. The corrosion-resistant steel comprises the following chemical components in percentage by mass: 0.3 to 0.8 percent of C, 18 to 22 percent of Mn, 7 to 10 percent of Al, 2.0 to 3.5 percent of Cu and the balance of Fe and inevitable impurities. Meanwhile, the chemical components meet the corrosion-resistant synergistic coefficient K, and K is larger than or equal to 0.09 and equal to Cu / (Mn + Al) and smaller than or equal to 0.11. The corrosion-resistant steel has a single-phase austenite matrix structure, and the Cu element is distributed in a supersaturated solid solution state in the matrix. The method is used for preparing the corrosion-resisting steel, and through the reverse design of'component cooperative locking 'and'forbidden aging solid solution process', pitting corrosion inducements are eliminated while low density is guaranteed, and excellent long-acting chlorine corrosion resistance is achieved.

The application discloses a ZrCu modified CVD-SiC anti-ablation coating and a preparation method thereof, and belongs to the technical field of ablation protection coatings. The preparation method can introduce Zr and Cu elements into the SiC coating through a molten salt reaction, forms a Zr-Si-Cu inlaid structure in the coating, and forms the ZrCu modified CVD-SiC anti-ablation coating with high compactness and uniform composition distribution. The method can prepare the ZrCu modified CVD-SiC anti-ablation coating with high compactness and uniform composition distribution at a relatively low temperature (1300-1500 DEG C) through simple process operation and a heat treatment device, and the preparation process is simple and easy to control without repeated deposition or multiple complex high-temperature reactions.

The application discloses a strain-induced supersaturated solid solution analysis method for a non-miscible alloy system based on mixed entropy evolution, and the method comprises the following steps: for a target A-B binary alloy, a mixed entropy-component relationship diagram of the target A-B binary alloy is drawn; the average component and the initial equilibrium phase component point of the target A-B binary alloy are calibrated in the diagram; based on the increase of the mixed degree of the entropy generation driving force, the two-phase components are predicted to evolve in the entropy increase direction during a severe plastic deformation process, until a single-phase supersaturated solid solution is formed. Based on the irreversible thermodynamic principle, the severe plastic deformation process is defined as a continuous external entropy generation source for driving the evolution of the system, through the analysis of the dynamic competition mechanism of element mixing and element demixing dominated by the entropy generation source, the formation mechanism of the supersaturated solid solution is revealed, and the application provides a universal theoretical tool for understanding and predicting the supersaturated solid solution behavior of the non-miscible alloy system under the severe plastic deformation.

The application discloses a kind of corrosion-resistant magnesium alloy based on high Zn, Al content and preparation method thereof, the magnesium alloy includes the following mass percentage components: Zn 5%~8%, Al 5%~15%, Y 0.1%~3%, Mn 0.1%~2%, the balance is Mg and inevitable impurities.The application utilizes the synergistic effect of Al and Zn, Y element, forms dispersed distribution Al2Y, Mg-Al-Y-Zn and Mg-Al-Y phase in as-cast structure, effectively refines grain and blocks corrosion propagation channel, meanwhile, the solid solution effect of Al element promotes the formation of continuous and dense composite protective film on the substrate surface.The alloy does not need complex surface treatment or heat treatment, and the hydrogen evolution corrosion rate in 3.5% NaCl solution can be as low as 0.3 mm / a.The application not only significantly improves the intrinsic corrosion resistance of high Zn, Al content corrosion-resistant magnesium alloy, but also has low cost and simple process, providing a new idea for the large-scale application of corrosion-resistant as-cast magnesium alloy.

The application discloses a high-strength and high-plasticity Mg-Y-Zn-Si-Li-Al alloy and a preparation method thereof, and relates to the technical field of light alloy processing. 97.5 Y1Zn 0.5 In the Mg 97.5 Y1Zn 0.5 Si1base alloy, the Si element is combined with the Y element to form a YSi hard and brittle phase, which is easy to hinder the elongation of the alloy; the addition of the Li element plays a grain refining role on the one hand, effectively improves the strength of the alloy, and optimizes the second phase form on the other hand, promotes the transformation of the second phase to the nanometer level, provides more slip paths for dislocation movement, and avoids plasticity deterioration; the Al element is further combined with the Y element to form a high-strength Al2Y strengthening phase, which not only reduces the precipitation of the hard and brittle phase, but also stabilizes the organizational structure through the pinning effect at the grain boundary.

This invention discloses a method for suppressing the formation of brittle borides in nickel-based brazing filler metals and its application. The method involves compounding a certain amount of metallic Cu powder onto a commercially available BNi-2 nickel-based brazing filler metal. The content of the reinforced BNi-2 nickel-based brazing filler metal is 95-99 wt.%, and the content of Cu element is 1-5 wt.%. The elemental composition of the BNi-2 nickel-based brazing filler metal by mass percentage is as follows: Cr: 6-8 wt.%, Si: 4-5 wt.%, Fe: 2.5-3.5 wt.%, B: 2.75-3.5 wt.%, with the balance being Ni. The Cu-reinforced nickel-based brazing filler metal is applied between the surfaces of two stainless steel base materials and bonded using organic adhesive, resulting in a sandwich structure of stainless steel / Cu-reinforced BNi-2 brazing filler metal / stainless steel. The components are then brazed under vacuum conditions. The reinforcement method provided by this invention effectively suppresses the brittle phase at the weld center, which has a significant impact on performance. The joint forms a complete nickel-based solid solution, further improving the shear strength of the joint and overcoming the inherent shortcomings of nickel-based brazing filler metals.

This invention discloses a Cu-doped nitride composite coating and its preparation method, belonging to the field of current-carrying friction coating technology. The technical problem to be solved by this invention is how to improve the resistance of the substrate material to current-carrying friction, so that it can withstand the tribological material of the power system discharge effect to reduce the negative impact of stray current, thereby improving the bearing life and thus improving the stability and energy efficiency of electric vehicles. The technical solution adopted is as follows: the composite coating includes a substrate layer, a single Nb transition layer is disposed on the upper surface of the substrate layer, and an NbN-Cu coating is disposed on the upper surface of the single Nb transition layer. The atomic percentage of Cu element in the NbN-Cu coating is 6.88%≤Cu≤25.30%.

The invention relates to the field of biotechnology, in particular to an enhanced piezoelectric material for triggering sonodynamic response as well as a preparation method and application of the enhanced piezoelectric material. According to the invention, the UIO-66 (at) Cu-SS is prepared by introducing a Cu element to enhance the sonodynamic response of a metal organic framework material (UIO-66) with a piezoelectric property. According to the invention, the Cu-Cu composite material is beneficial to the valence state conversion process of the Cu element, can effectively improve the sonodynamic response characteristic and promote the explosive generation of active oxygen, also has the glutathione degradation performance, and can effectively promote the antibacterial effect. Therefore, the UIO-66 (at) Cu-SS is prepared by introducing the Cu element, so that the sonodynamic response characteristic of the UIO-66 is further enhanced.

The invention discloses a Mg-Y-Zn-Si-Li-Al alloy with a high product of strength and elongation and a preparation method of the Mg-Y-Zn-Si-Li-Al alloy, and relates to the technical field of light alloy processing. According to the Mg-Y-Zn-Si-Li-Al alloy with the high product of strength and elongation and the preparation method of the Mg-Y-Zn-Si-Li-Al alloy, in the Mg97.5 Y1Zn0. 5Si1 basic alloy, the Si element and the Y element are combined to form a YSi hard and brittle phase, and the phase serves as a stress concentration point and is prone to hindering improvement of the elongation of the alloy; the Li element is added, on one hand, the grain refinement effect is achieved, the alloy strength is effectively improved, on the other hand, the form of a second phase is optimized, the second phase is promoted to be converted to the nanoscale, more slippage paths are provided for dislocation motion, and plasticity deterioration is avoided; the Al element is further combined with the Y element to form a high-strength Al2Y strengthening phase, precipitation of hard and brittle phases is reduced, and the structure is stabilized through the pinning effect at the grain boundary.

The invention belongs to the technical field of metallurgy, and particularly relates to hot forming steel special for a commercial vehicle rim and a production method thereof. The steel comprises the following chemical components in percentage by mass: 0.18%-0.2% of C, 1.1%-1.3% of Mn, 0.1%-0.15% of Si, less than or equal to 0.003% of S, less than or equal to 0.013% of P, 0.15%-0.17% of Cr, 0.03%-0.04% of Alt, less than or equal to 0.004% of N, 0.045%-0.055% of Ti, 0.028%-0.032% of Nb, 0.0025%-0.0035% of B and the balance of Fe and inevitable impurities, and the content of Ti and the content of N meet the condition that Ti / N is greater than or equal to 16. The invention further provides a production method based on the full endless continuous casting and rolling production line, through accurate component design and process control, the welding performance and the bending fatigue performance of the material are remarkably improved while the 1300MPa-grade strength is guaranteed, the cover annealing procedure is completely omitted, and short-process and low-cost stable production of the high-performance rim steel is achieved.

The invention relates to the technical field of nickel-chromium alloy materials, in particular to a high-stability temperature coefficient nickel-chromium-based alloy foil and a preparation method thereof.The preparation method comprises the following steps that S1, composite powder is prepared for standby application; s2, 60-70 parts by weight of nickel powder, 20-25 parts by weight of chromium powder, 3-6 parts by weight of iron powder and 2-5 parts by weight of molybdenum powder are weighed and subjected to dry mixing with 2-8 parts by weight of the composite powder, and mixed powder is obtained; and S3, the mixed powder is loaded into a mold, a blank is pressed and then subjected to vacuum sintering, then hot rolling, multi-pass cold rolling and intermediate annealing are conducted, finally low-temperature annealing is conducted for 2-3 h at the temperature of 400-450 DEG C, and the nickel-chromium-based alloy foil with the high stable temperature coefficient is obtained along with furnace cooling. According to the method, lattice gaps are filled with the base material to restrain distortion, titanium carbide hinders element diffusion, the auxiliary material forms a low-expansion rigid supporting point, plasma activation and coupling modification are combined, the influence of lattice distortion and element diffusion on the temperature coefficient is reduced, and the temperature coefficient stability of the alloy foil is effectively improved.

The invention discloses a creep-resistant magnesium alloy with high elasticity modulus and high damping and a preparation method thereof, and the creep-resistant magnesium alloy with high elasticity modulus and high damping comprises the following components in percentage by mass: 1.2%-3.5% of Zn element, 2.5%-12% of Gd element, 0.5%-6% of Yb element, 0.15%-1.2% of Ni element, 0.3%-0.8% of Mn element, 0-0.5% of Cu element, 0.1%-5% of HRE element and the balance of Mg element. The HRE element is one or more of a Dy element, a Sm element and a Tb element, and the mixing enthalpy delta H of the creep-resistant magnesium alloy with the high elastic modulus and the high damping is-1.1 kJ / mol to-0.2 kJ / mol. The creep-resistant magnesium alloy with high elastic modulus and high damping is suitable for the fields of aerospace, precise instruments, transportation, 3C electronics and the like, and has remarkable technical and economic values.

The invention relates to a Cu-Mg-Ca ternary metal bifunctional material and a preparation method thereof, and a CO2 capture and in-situ utilization method. The Cu-Mg-Ca ternary metal bifunctional material contains a Cu element, a Mg element and a Ca element, the atomic ratio of the Cu element to all metal elements is 0.1%-1%, the atomic ratio of the Mg element to all metal elements is 5%-15%, the Cu element exists in the form of Cu metal, the Mg element exists in the form of MgO, and the Ca element exists in the form of CaO. The Cu-Mg-Ca ternary metal bifunctional material disclosed by the invention is excellent in catalytic effect, capable of relieving sintering and inactivation of the bifunctional material and excellent in cycling stability.

This invention discloses a method for preparing a high-strength, low-anisotropy aluminum-lithium alloy material, belonging to the field of aluminum alloy production technology. This invention utilizes the synergistic effect between alloy composition and preparation process, adding Mg, Ag, Zn, Mn, and Cu elements to the aluminum-lithium alloy. These five elements, along with Al and Li, interact and promote each other. Furthermore, a process involving solution treatment, cross-rolling, annealing, low-temperature solution treatment followed by cross-cold rolling cycles, and artificial aging treatment is employed to obtain an aluminum-lithium alloy material with numerous fine grains, uniform precipitate distribution, and weak texture strength. The aluminum-lithium alloy obtained by this invention exhibits high strength, high elongation, and low anisotropy.

The invention provides a low-cost titanium alloy high-efficiency high-toughness welding method, which comprises the steps of welding wire design, preparation before welding, welding process and post-welding treatment, and the welding wire design comprises the following steps: controlling the contents of Al and V elements to be close to the level of a base metal to realize joint strength matching; the proportion matching of Fe and Cr elements is controlled, and the strength and the toughness are both considered; the welding wire contains B elements or TiB2 particles or TiC particles, and crack propagation inhibition is achieved. According to the method, the structure evolution of a heat affected zone can be effectively regulated and controlled while the welding defects are restrained, the joint obdurability matching is improved, and good process adaptability and economical efficiency are achieved.

The invention provides Fe-Mn-Al-C-Zr high manganese steel and a preparation method thereof, and belongs to the technical field of alloy materials. By controlling the content of the Al element, the density of the Al element is lower than that of the Fe element, so that the density of the high-manganese steel is reduced; by controlling the content of the C element, the stability and recovery power of an austenite phase in the high-manganese steel can be improved, internal stress is eliminated, the strength of the high-manganese steel is improved, meanwhile, an interstitial solution strengthening effect is achieved, and the obdurability and wear resistance of the high-manganese steel are improved; the austenite phase region can be expanded by controlling the Mn element content, and the austenite phase stability is improved; the Mn element also has a solid solution strengthening effect, so that the strength of the high-manganese steel can be improved; the content of the Zr element is controlled to ensure that the Zr element and the C element form a precipitated phase (such as ZrC), and the strength is further improved by separating out and strengthening refined grains.

The invention discloses a TiB2 particle reinforced Al-Zn-Mg-Cu composite material system and a preparation method of the TiB2 particle reinforced Al-Zn-Mg-Cu composite material system. A Ti modified in-situ TiB2 / Al intermediate alloy is prefabricated, a TiB2 at-Al3Ti core-shell structure which is well combined with an Al matrix interface and is not prone to growth is constructed, a good TiB2 at-Al3Ti / Al coherent interface is formed, the interface mismatch degree is reduced to 2% from 6%, and the size of a reinforced phase is kept between 10 nm and 200 nm. And meanwhile, the TiB2 particle reinforced Al-Zn-Mg-Cu composite material is prepared through a two-step method, and the problem that Mg, Zn and Cu elements are burnt out and oxidized due to the fact that the in-situ reaction of KBF4 and K2TiF6 is not matched with the aluminum alloy smelting temperature interval is solved. The TiB2 / Al interface bonding in the TiB2 particle reinforced Al-Zn-Mg-Cu composite material prepared through the method is good, compared with a composite material prepared through a traditional technology, the elasticity modulus is improved by 15-40%, the tensile property is improved by 10% or above compared with the composite material prepared through the traditional technology, the good fatigue performance larger than or equal to 260 MPa is achieved, and the requirements for light weight and high strength of components are better met.

The application discloses a preparation process of B-Zr doped cobalt-based alloy powder and coating, and the alloy powder is composed of the following components with mass percentage: 90-95% of Stellite6, 1-5% of B and 1-5% of Zr. By introducing appropriate amounts of B and Zr elements into the Stellite6 alloy powder, the Zr and B elements synergistically alleviate the brittle boride to inhibit cracks, and synergistically form fine and dispersed ZrB2 and other stable high-hardness phases, promote the refinement of the structure, improve the hardness of the coating, and prevent B from forming a continuous network of brittle phases. The addition of the B element can also generate intermetallic compounds with Co elements and Cr elements, which have high hardness and high wear resistance, so that the overall strengthening layer hardness is improved. The finally formed high-hardness strengthening layer has a thickness of more than 0.5 mm and no cracks are generated. The hardness of the strengthening layer is more than 1100 HV, and the hardness of the strengthening layer can be more than 2-4 times of the substrate.

The invention relates to an aluminum alloy plate for an attenuation-resistant ultrathin tank cover material, which comprises the following elements in percentage by mass: 0.07-0.15% of Si element, 0.07-0.15% of Al element, 0.07-0.15% of Al element, 0.07-0.15% of Al element and the balance of aluminum element. 0.15 to 0.3 percent of Fe element; 0.07%-0.15% of a Cu element; 0.3 to 0.5 percent of Mn element; 4.75%-4.95% of an Mg element; 0.01%-0.03% of a Ti element; 0.02 to 0.10 percent of Cr element; 0.01%-0.20% of a Zn element; the total content of the inevitable impurities is smaller than or equal to 0.15%; the sum of the mass of the Mn element and the mass of the Cr element in the aluminum alloy plate for the tank cover material is 0.40-0.55%. After the 0.200-0.208 mm ultra-thin 202 series two-piece can easy-open cover prepared from the aluminum alloy is subjected to 90 DEG C / 40 min water boiling aging attenuation, the pressure resistance is larger than or equal to 700 KPa, and the attenuation amplitude is smaller than or equal to 30 KPa.

The invention discloses high-hardness nickel-based composite powder for laser cladding and a laser cladding method thereof.The composite powder is composed of 1-4 wt% of nearly-spherical pure aluminum powder and the balance nickel-based high-temperature alloy powder, the average particle size of the nearly-spherical pure aluminum powder is 100-150 microns, the average particle size of the nickel-based high-temperature alloy powder is 75-150 microns, and the nickel-based high-temperature alloy powder is composed of 15-17 wt% of Cr, 2-4 wt% of Fe, 3-4 wt% of B, 1-2 wt% of Si, 0.5-1 wt% of C and the balance Fe. And the balance of Ni. According to the method, the two kinds of powder are evenly mixed through the acoustic resonance mixing technology, molten pool flowing and solidification in laser cladding are changed by regulating and controlling the content of aluminum powder, the crack sensitivity is reduced, and therefore a large-area crack-free cladding layer is obtained, meanwhile, the Cr element in the nickel-based high-temperature alloy powder can react with the B element and the C element so that hard ceramic phase chromium boride and chromium carbide can be separated out, and therefore the large-area crack-free cladding layer can be obtained. And the hardness of the cladding layer is greatly improved.