9 results about "Accumulative roll bonding" patented technology

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.

The application relates to the technical field of material processing, and particularly discloses an aluminum alloy processing method through cumulative pack rolling, contact heating and artificial aging. The processing technology of the application comprises the following steps: (1) homogenizing treatment is performed on aluminum alloy material; (2) the surface of the aluminum alloy material is cleaned; (3) pre-deformation is applied to the aluminum alloy material by using a cumulative pack rolling method, and water quenching treatment is performed after the pack rolling is completed; (4) the upper and lower molds of a contact heating device are preheated to the solid solution temperature of the aluminum alloy material, and the aluminum alloy material is placed between the upper and lower molds to perform contact heating so as to realize solid solution treatment; (5) stamping forming quenching treatment; (6) the aluminum alloy material after the stamping quenching is transferred to a heating furnace to perform artificial aging treatment. The aluminum alloy processing method through cumulative pack rolling-contact heating-artificial aging can greatly shorten the solid solution time and aging time of the aluminum alloy, improve the strength and hardness of the aluminum alloy, and does not cause loss of the elongation rate of the aluminum alloy.

The application relates to a preparation method of a layered B4C reinforced aluminum-based neutron absorption material plate, which comprises the following steps: using pre-oxidized aluminum powder and B4C powder to obtain a (B4C+Al2O3) / Al composite material plate through powder metallurgy, extrusion, rolling and other processes; placing mixed powder of B4C and 6061 Al between two (B4C+Al2O3) / Al composite material plates of the same size to obtain a layered blank sample of a (B4C+Al2O3) / Al plate with a B4C / 6061 Al mixed particle interlayer; riveting the layered blank sample, adopting a cumulative roll bonding method to roll the layered blank sample for multiple times to obtain a blank, and annealing the blank sample and cooling in air to obtain a layered B4C particle reinforced aluminum-based neutron absorption material plate. The preparation method of the layered B4C / Al-based neutron absorption material plate provided by the application has excellent mechanical properties and neutron absorption capacity, and can be used for dry storage and transportation of spent fuel.

The invention relates to the technical field of metal material preparation, and particularly discloses a method for preparing an ODS alloy based on a 3D printing and ply rolling process, and the method comprises the following steps: S1, uniformly mixing alloy powder with reaction element powder; s2, preparing the uniformly mixed powder into a block material; s3, stacking the blocks to form a sheathed steel material A, and carrying out hot isostatic pressing treatment; s4, hot rolling treatment is carried out, a sheath is removed, and a hot rolled plate is formed; cutting and processing the hot-rolled plate into thin plates with the same size; s5, repeating the steps S3 to S4 until the reaction elements are uniformly distributed to obtain a thin plate; s6, performing high-temperature oxygen permeation treatment; s7, the thin plates are stacked to form sheathed steel B, and hot isostatic pressing treatment is carried out; and S8, the sheathed steel B is subjected to hot forging, a sheath is removed, and the ODS alloy is obtained. The prepared ODS alloy has the advantages of high purity, high-uniformity oxidation phase, controllable crystal grains, stable quality and isotropy.

The application discloses a preparation method of a copper alloy with a double heterostructure and belongs to the technical field of material preparation. The method comprises the following steps: firstly, a copper plate and an aluminum plate are subjected to accumulative roll bonding to obtain a Cu / Al multilayer composite plate; and finally, the obtained sample is subjected to surface grinding and polishing, and surface nanocrystallization treatment is carried out at room temperature for 2 min. It is found for the first time that after the accumulative roll bonding, annealing is carried out, a hetero-layer structure is formed, and the traditional surface nanocrystallization structure is superposed, so that a double heterostructure is formed, and the double heterostructure with matched yield strength and plasticity is obtained.

The application belongs to the technical field of biomedical alloy materials, and particularly relates to a degradable biomedical zinc alloy material and a preparation method and application thereof. The degradable biomedical zinc alloy is composed of the following elements in percentage by weight: Cu: 1.0%~2.0%, Ag: 0.1%~2.0%, Zr: 0.1%~2.0%, and the balance is Zn. The application provides a preparation method for improving the strength and corrosion resistance of the degradable biomedical zinc alloy. The method is characterized by a cumulative accumulative roll bonding process and a subsequent recrystallization annealing process, so as to manufacture a layered bimodal structure material with alternating distribution of fine grains and coarse grains. The fine grains are strengthened by a back stress strengthening mechanism to give the material strength, and the coarse grains can provide necessary work hardening rate and uniform elongation rate, so that the strength and plasticity are synergistically improved. In addition, the annealing treatment can also improve the grain structure and grain boundary structure of the metal material, eliminate stress and deformation, reduce defects, and improve the corrosion resistance of the alloy.

This invention discloses a method for obtaining high-strength, high-conductivity copper alloys through gradient twinning, belonging to the field of high-strength, high-conductivity electronic device fabrication technology. The fabrication method includes: obtaining plates with various texture orientations through directional solidification technology, stacking them sequentially from hard orientation to soft orientation to prepare multilayer plates with different texture orientations, and then performing cumulative roll bonding on the multilayer plates. Through this method, the gradient twinned copper alloy prepared by this invention can effectively improve the conductivity of the alloy while increasing its strength. This design and fabrication method for high-strength, high-conductivity copper alloys has significant guiding significance for adapting to the development of industries such as electronics and information, future transportation, and aerospace, and has very good industrial application prospects.

The invention relates to the technical field of metal layered composite plates, in particular to a high-performance magnesium-aluminum layered composite plate material and a preparation method thereof. The method aims at solving the problem that when the magnesium / aluminum layered composite material is prepared through an existing accumulative roll bonding technology, the mechanical property of the composite material is deteriorated due to the fact that a continuous brittle intermetallic compound layer is formed on an interface. According to the method, the specific asymmetric lamination initial design and the optimized accumulative roll bonding process are adopted to cooperatively regulate and control the atomic diffusion and shear deformation process at the heterogeneous interface, interface intermetallic compounds are promoted to be formed in a discontinuous blocky form, and meanwhile gradient distribution of the layered structure in the composite material is achieved. The layered composite material prepared through the method has high strength, good plasticity and excellent interface bonding performance, and the adverse effect of continuous brittleness on the comprehensive performance of the material is effectively avoided. The method is simple in process, low in cost and suitable for the fields of aerospace, automobile lightweight and the like.

The application discloses a preparation method of magnesium / aluminum layered composite plate with high modulus and high damping, comprising the following steps: 1) riveting aluminum plate / magnesium plate / aluminum plate in sequence to form a blank, and adding metal powder between the magnesium and aluminum to obtain a composite plate blank; 2) placing the composite plate blank into a heating furnace to perform single-pass rolling to obtain an aluminum / magnesium / aluminum composite plate; 3) annealing the aluminum / magnesium / aluminum composite plate, then performing flattening and straightening, cutting into a required size, and performing at least three-layer cumulative accumulative roll bonding to obtain a superimposed composite plate; and 4) performing heat preservation, flattening and straightening on the superimposed composite plate to obtain the magnesium / aluminum layered composite plate with high modulus and high damping. The magnesium / aluminum layered composite plate provided by the application has a tensile strength of 250-300 MPa, an interface strength of 75-90 MPa, an elastic modulus of 50-62 Gpa, and a Q ‑1 value of 0.015-0.025, and has the advantages of light weight, high modulus and high damping, and can be widely applied in the fields of aerospace, 3C electronics, military industry and the like.