13results about How to "Improve plastic deformation ability" patented technology

The application belongs to the technical field of metal glass film preparation, and specifically discloses a high-strength and high-toughness nano-multilayer metal glass with gradient component design and a preparation method thereof. The high-strength and high-toughness nano-multilayer metal glass comprises periodically repeated gradient unit structures, each of which is stacked by six component layers; wherein, along the deposition direction from bottom to top, the atomic percentage of Cu in each component layer first decreases and then increases, and the atomic percentage of Ta first increases and then decreases. The application overcomes the shortcomings of the existing metal glass, which has high strength but low toughness, and greatly improves the plastic deformation capacity of the metal glass through the unique gradient structure design and the corrugated interface formed by high deposition gas pressure.

The application discloses a magnesium-based composite material and a preparation method and application thereof. The magnesium-based composite material comprises ferroferric oxide and a magnesium alloy. The magnesium alloy comprises the following components in percentage by weight: 3wt.%-6wt.% of Zn, 0.3wt.%-0.8wt.% of Ca, and the rest of Mg and inevitable impurities. The magnesium-based composite material can effectively solve the problem that micron-sized particles are easy to agglomerate in a metal liquid when the magnesium alloy is modified, and the plasticity of the alloy is reduced and the alloy is not easy to be formed.

The application discloses a graphene modified aluminum-based composite plate and a preparation method thereof, which comprises the following components in terms of mass ratio: aluminum alloy: ceramic: alkyl magnesium solution: graphene = 4500-5000: 10-50: 1000: 1; the ceramic particle size is 0.05-50 mu m; the aluminum alloy particle size is 10-100 mu m; the composite plate provided by the application has a tensile strength of up to 512 MPa, a yield strength of up to 407 MPa, and a corrosion rate of only 0.9 g / m 2 d, and the preparation method is simple and efficient.

A laser-assisted rivet-free riveting method of composite and metal materials, first, the composite material is stacked on the metal material to complete the laser ring cutting of the composite material through the annular laser to form regular through holes; then the connecting plate is pre-tightened by pressing the concave die; under the forming force of the convex die upward movement, the metal material is plastically deformed and rivet-free riveting is formed at the hole cutting part of the composite material; the waste cutting is collected under the condition of not completely opening the riveting die by opening the concave die outer cylinder in sections. The present application utilizes the difference in the absorption capacity of resin-based composite and metal materials for specific laser waveband laser energy, realizes the continuous process of laser cutting composite and metal material plastic deformation, and further realizes the rivet-free riveting of composite and metal materials without pre-punching, which is suitable for the connection of composite and metal materials with different resin materials as the matrix, and the connection head can have a certain tensile strength.

The application discloses an ultra-thin degradable Fe-Se alloy stent and a preparation method thereof. Fe particles and Fe-Se intermediate alloy powder are taken, Fe-Se ingots are obtained through smelting, the Fe-Se ingots are poured into a mold after being melted, Fe-Se rod materials are obtained, annealing treatment is conducted on the Fe-Se rod materials, annealed rod blanks are obtained, the annealed rod blanks are extruded to obtain extruded rod blanks, the extruded rod blanks are drawn in multiple passes to obtain Fe-Se tubular materials, and the Fe-Se tubular materials are processed to obtain the Fe-Se alloy stent. The Fe-Se alloy stent provided by the application has excellent mechanical properties and good degradation performance.

The invention discloses a surface coating process of a main shaft for a numerical control machine tool, and relates to the technical field of coating of main shafts of numerical control machine tools, and the surface coating process comprises the following steps: carrying out soft sand blasting on the main shaft, fixing the main shaft on a sand blasting table, carrying out 0.2 MPa low-pressure sand blasting for 3 minutes by using modified starch microspheres as a sand blasting medium, and cleaning the surface of the main shaft by using deionized water at 60 DEG C, fixing the main shaft in a suspension manner by using an elastic polyurethane clamp, putting the main shaft into a PVD vacuum coating chamber, and mounting a composite target material, a chromium target and a high-purity graphite target; modified starch microspheres are used as a soft sand blasting abrasive material, a soft matrix of the modified starch microspheres has excellent elasticity and plastic deformation capacity, the surface texture consistency of the spindle is guaranteed, and matrix microcracks and precision damage caused by a traditional hard abrasive material are avoided; by using the composite target material, a composite ceramic phase formed by nuclear phase zirconium dioxide and titanium dioxide has high hardness and excellent toughness, and the impact resistance of a subsequent coating can be enhanced through a stress buffer effect.

This invention discloses a welding process for high-manganese, high-alumina steel anchor chains, comprising the following steps: material preparation; ring bending; beveling; self-fusion root pass welding; filler layer welding on the front of the chain links; root cleaning; filler layer welding on the back of the chain links; and inspection. This invention uses high-manganese, high-alumina steel to manufacture the anchor chain. Due to the excellent impact resistance of high-manganese, high-alumina steel, it can effectively absorb the impact energy from the movement of engineering equipment in harsh marine environments, significantly improving the service life of the anchor chain and ensuring its safety during use. The welding process for high-manganese, high-alumina steel anchor chains provided by this invention solves many problems in the welding of high-manganese, high-alumina steel anchor chains in the prior art and is more suitable for the production of high-manganese, high-alumina steel anchor chains.

This invention discloses a method for manufacturing an electric motorcycle battery pack housing. An integrally extruded aluminum alloy profile is cut and bent to form the main frame structure of the battery pack housing. The profile has two hollow sides, enabling direct bending of the thick-walled sides. This completely eliminates the complex pre-machining and laser welding processes at bends. The hollow structure effectively absorbs and releases stress during bending, preventing cracks and wrinkles. The production process is simplified to "extrusion → cutting → bending → welding," significantly shortening the production cycle. The U-shaped splicing significantly improves the tolerance to bending angle errors, making laser welding easier to align and resulting in more consistent weld penetration. This avoids stress concentration, improves fatigue resistance, and ensures a smooth weld transition without the need for grinding.

The invention belongs to the technical field of titanium alloy forming, and relates to a titanium alloy sheet bending forming method which comprises the following steps: (1) spraying: cleaning the surface of a sheet, spraying a protective coating until the film thickness is 0.2-0.3 mm, and drying the film in the shade; (2) annealing is conducted, specifically, the thin plate obtained after spraying in the step (1) is annealed, and the annealing temperature ranges from 700 DEG C to 925 DEG C; (3) bending is conducted, specifically, after annealing and heat preservation are finished, bending is conducted, and after bending forming is conducted, natural cooling is conducted to the room temperature; and (4) the step (2) and the step (3) are repeated, and bending forming of the whole product is completed. By the adoption of the method, bending forming of titanium alloy parts of different thicknesses and different materials can be achieved, the utilization rate of raw materials of products is increased, and the machining cost is reduced.

The application discloses a controllable energy-absorbing CH-type corrugated stand column and an aircraft fuselage structure, and belongs to the technical field of aircraft structures. A H-type corrugated section is arranged in the middle section of the CH-type corrugated stand column, and upper and lower ends are C-type connecting sections, which are connected with a floor beam and a fuselage frame through corner pieces, respectively. The aircraft fuselage structure comprises the CH-type corrugated stand column and the fuselage frame, and a plurality of induction openings are arranged at the upper edge strips of the fuselage frame. Through the combined action of the CH-type corrugated stand column and the fuselage frame, a plurality of plastic hinges are generated at the induction openings, so that stable progressive failure of the CH-type corrugated stand column under pressure is ensured, controllable failure and energy absorption stability of the aircraft fuselage frame section are realized, the energy absorption efficiency of the structure and the landing performance are greatly improved, and the problems of uncontrollable deformation of the thin-walled structure of the aircraft fuselage lower opening section and low energy absorption efficiency are solved.

The application provides a preparation method of powder metallurgy Fe-6.5%Si high silicon steel sheet, and belongs to the field of powder metallurgy and metal plastic processing. The application takes Fe-6.5%Si pre-alloyed spherical powder as raw material, adopts powder canning hot isostatic pressing method to prepare Fe-6.5%Si high silicon steel ingot, and sequentially passes through small deformation amount hot extrusion with an extrusion ratio of 4-7, hot rolling, warm rolling and cold rolling to prepare high silicon steel sheet with a thickness of 0.1-0.4mm. The preparation process provided by the application can be completed on existing conventional equipment, and industrialized production can be realized.

This invention discloses a toughening method for naphthalene-biphenyl polyetherketone resin, belonging to the field of composite material technology, comprising the following steps: vacuum drying of naphthalene-biphenyl polyetherketone resin, polyetherimide resin, and nano-silica; mixing nano-silica with polyetherimide resin to obtain a composite powder; feeding the composite powder and naphthalene-biphenyl polyetherketone resin into a twin-screw extruder for melt blending, wherein the temperatures of the first, second, and third zones and the die head of the twin-screw extruder increase in a stepped manner, and the twin-screw extruder outputs granulated blended material; using injection molding to prepare a hydrogen storage bottle liner from the blended material; this application, by introducing a polyetherimide toughening phase and utilizing nano-silica for interface control, constructs a ternary synergistic structure of naphthalene-biphenyl polyetherketone continuous phase-polyetherimide toughening phase-nano-silica interface layer, thereby improving the material's plastic deformation capacity and interfacial bonding capacity, achieving high toughness.

This invention discloses a 780MPa-grade rare-earth high-strength dual-phase steel, its preparation method, and its applications. Belonging to the technical field of rare-earth dual-phase steel, the chemical composition and mass percentage of the 780MPa-grade rare-earth high-strength dual-phase steel are as follows: C: 0.08-0.10%; Si: 0.15-0.25%; Mn: 1.8-2.4%; Als: 0.020-0.055%; Nb: 0.025-0.035%; Ti: 0.015-0.025%; Ce: 0.0026-0.0045%; P: ≤0.012%; S: ≤0.004%; N: ≤0.004%, with the remainder being Fe and unavoidable impurities. In this invention, the proportion of large-angle grain boundaries in the rare-earth high-strength dual-phase steel is 49.4%-56.4%. From the microstructure and crystal orientation results, the rare-earth steel of this invention exhibits better toughness and plastic deformation capacity.