11results about How to "Hinder dislocation movement" patented technology

The invention discloses high-weldability aluminum-silicon coating steel containing residual element Cu for electric furnace steelmaking and a preparation method of the high-weldability aluminum-silicon coating steel, and belongs to the technical field of metal materials. Based on the innovative thought of copper alloying, the residual element Cu in waste steel is refined, the content of alloying elements Cu in the aluminum-silicon coating steel and the component content of As, Sn, Sb and Bi are precisely regulated and controlled, and the high-weldability aluminum-silicon coating steel containing the residual element Cu is obtained; the invention aims to develop the high-weldability aluminum-silicon coating steel. At present, in the prior art, a certain content of ferrite exists in the microstructure of an aluminum-silicon coating steel welding joint prepared without removing a coating, however, according to the invention, steel components are innovatively designed, and after a residual element Cu is added, the aluminum-silicon coating steel welding joint is subjected to full martensization, so that the mechanical property of the aluminum-silicon coating steel welding joint is remarkably improved. The method disclosed by the invention inherits the concept of sustainable development, realizes recycling of waste steel, and has important significance on development of novel aluminum-silicon coating steel and popularization and application of the novel aluminum-silicon coating steel in the field of laser welding.

The invention belongs to the technical field of metal additive manufacturing, and particularly relates to a 4xxx series aluminum alloy WAAM additive manufacturing preparation method. The preparation method comprises the steps that an aluminum-silicon alloy workpiece is obtained through layer-by-layer stacking through a wire electric arc additive manufacturing method, and then cold deformation treatment and low-temperature short-time heat treatment are sequentially conducted on the aluminum-silicon alloy workpiece. According to the aluminum-silicon alloy workpiece prepared through the preparation method, air holes generated in the printing process can be effectively closed, the tensile strength is greatly improved, meanwhile, reduction of plasticity is restrained to the maximum extent, and the preparation method is simple, convenient, low in cost and suitable for industrial large-scale production.

The application relates to the technical field of steel wires, and discloses a corrosion-resistant galvanized steel wire and a preparation method thereof. The corrosion-resistant galvanized steel wire is obtained by galvanizing a steel wire body through plating aid, and the steel wire body is composed of the following components in percentage by weight: C 0.15%-0.20%, Mn 0.28%-0.45%, Mo 0.15%-0.20%, Cu 0.12%-0.25%, W 0.05%-0.10%, Al 0.08%-0.12%, Ti 0.004%-0.016%, Sn 0.004%-0.015%, B 0.005%-0.01%, Y 0.005%-0.008%, S<=0.005%, P<=0.005%, and the balance is iron and inevitable impurities. Through the technical scheme, the problem that the tensile strength of the steel wire body in the galvanized steel wire needs to be improved in the related art is solved.

This invention belongs to the field of stainless steel. Specifically, this invention relates to a fine-grained, high-strength, and high-toughness soft magnetic stainless steel synergistically strengthened by Ti and Cu, and soft magnetic stainless steel profiles containing the same. The soft magnetic stainless steel of this invention is composed of the elements Cr, Cu, Mo, Ti, C, Fe, and unavoidable impurities. In the preparation process of the soft magnetic stainless steel profile of this invention, according to the composition, the material is smelted and processed through steps such as solution treatment, hot rolling, cold drawing, recrystallization annealing, and aging. The process parameters in each step are strictly controlled to prepare a soft magnetic stainless steel profile with a fine and uniform microstructure, strengthened by trace carbide precipitation and high-density dispersed coherent nano-precipitates, and possessing excellent low-temperature toughness and soft magnetic properties. The fine-grained, high-strength, and high-toughness soft magnetic stainless steel profile synergistically strengthened by Ti and Cu of this invention can be effectively applied to solenoid valves and related products that operate in low-temperature media and require certain strength and toughness, and has good prospects for promotion and application value.

The invention relates to the technical field of aluminum-based composite material preparation, in particular to a ceramic reinforced aluminum-based workpiece and a preparation method. The ceramic reinforced aluminum-based workpiece is prepared by the method. The method comprises the steps that a forming die is assembled and filled with aluminum-based composite powder; sintering the forming die filled with the aluminum-based composite powder in an inert atmosphere to obtain a sintered green body; performing die forging treatment on the sintered green body to obtain a prefabricated green body; and after the prefabricated blank is machined to the size of a finished product, the prefabricated blank is sequentially subjected to solution treatment and aging treatment, and the ceramic reinforced aluminum-based workpiece is obtained. By means of the method, the ceramic reinforced aluminum-based workpiece with the large length-diameter ratio can be prepared, and the problems that cracks are generated when a formed blank is not separated from the female die, and layering and fragmentation are generated in the demolding process are solved.

The invention relates to the technical field of alloy coating materials, and particularly discloses an anti-oxidation coating for a high-pressure hot-pressing mold and a preparation method of the anti-oxidation coating. The high-pressure hot-pressing mold anti-oxidation coating comprises a transition layer and a functional layer which are sequentially arranged from a mold base body to the outside, the transition layer is a TiN-SiC gradient composite layer, the functional layer takes Al2O3-NiCrAlY as a base body, and nano ZrB2 and rare earth CeO2 which are subjected to double modification treatment are compositely doped; and the dual-modified nano ZrB2 is ZrB2 particles which are coated with a silane coupling agent KH-560 and a NiCr alloy. The anti-oxidation coating of the high-pressure hot-pressing mold has both oxidation resistance and wear resistance, and the high-temperature hardness stability and wear resistance of the anti-oxidation coating are effectively enhanced.

The invention relates to a titanium-containing hot-dip aluminum-zinc alloy coating, a steel plate and a preparation method of the titanium-containing hot-dip aluminum-zinc alloy coating, and the alloy coating comprises the following chemical components in percentage by weight: 55.0% of Al, 1.6% of Si, 0.010%-0.050% of Ti and the balance of Zn. The alloy coating steel plate comprises a steel substrate and a titanium-containing hot-dip alloy coating attached to the surface of the steel substrate. The preparation method comprises the following steps: S1, preparing a plating solution; s2, pretreatment of the steel matrix; s3, carrying out a hot dipping process; s4, carrying out post-treatment; the method has the beneficial effects that the content of Ti in the plating solution is accurately regulated and controlled, hot dipping technological parameter optimization is combined, uniform refining of a plating layer structure is achieved, heterogeneous nucleation of Al-rich phase dendritic crystals can be efficiently promoted, the spangle size is reduced to be within 200 micrometers from 800 micrometers, meanwhile, the side effect that zinc slag is increased due to excessive Ti is avoided, the hardness of the refined plating layer is improved by 30%-50%, grain boundary distribution is uniform, and the plating layer has the good corrosion resistance. The performance is obviously improved.

This invention discloses a multilayer piezoelectric ceramic vibration device for improving the strength and plasticity of alloys manufactured by laser additive manufacturing. Belonging to the field of electrical ceramic materials technology, it includes a vibration platform, a function amplifier, a power amplifier, and a multilayer piezoelectric ceramic actuator adapted to the vibration platform. The vibration platform supports a metal substrate and transmits the vibration of the multilayer piezoelectric ceramic actuator to the molten pool during the laser additive manufacturing process. Through the high-frequency stable vibration output by the multilayer piezoelectric ceramic actuator, a strong acoustic flow effect and mechanical disturbance effect are formed in the molten pool region. On the one hand, this accelerates the escape of gas from the molten pool, completely eliminating porosity defects such as pores and shrinkage, solving the problems of incomplete fusion and uneven interface bonding in traditional laser additive manufacturing. On the other hand, it breaks up the coarse dendrites growing in the molten pool, increases the nucleation core, and achieves significant refinement of grains and the second phase structure, ultimately achieving a synergistic improvement in alloy strength and plasticity.

The application relates to the technical field of alloy coating materials, and particularly discloses a high-pressure hot-pressing die oxidation-resistant coating and a preparation method thereof. The high-pressure hot-pressing die oxidation-resistant coating comprises a transition layer and a functional layer arranged outward from a die base body, the transition layer is a TiN-SiC gradient composite layer, the functional layer takes Al2O3-NiCrAlY as a base body, and is compounded and doped with double-modified nano ZrB2 and rare earth CeO2; the double-modified nano ZrB2 is ZrB2 particles coated with a silane coupling agent KH-560 and a NiCr alloy. The high-pressure hot-pressing die oxidation-resistant coating has oxidation resistance and wear resistance, and effectively enhances the high-temperature hardness stability and wear resistance of the oxidation-resistant coating.

The present application belongs to the field of stainless steel. Specifically, the present application relates to a fine-grained high-strength and high-toughness soft magnetic stainless steel synergistically strengthened by Ta and Cu and a soft magnetic stainless steel profile comprising the same. The soft magnetic stainless steel of the present application is composed of elements Cr, Cu, Mo, Ta, C, Fe and inevitable impurities. In the preparation process of the soft magnetic stainless steel profile of the present application, the composition is dosed and smelted, and then subjected to solid solution, hot rolling, cold drawing, recrystallization annealing and aging, etc. The process parameters in each process are strictly controlled, so that a soft magnetic stainless steel profile with fine and uniform structure, trace carbide precipitation and high-density dispersed coherent nanometer precipitate co-strengthening, and excellent low-temperature toughness and soft magnetic properties is prepared. The fine-grained high-strength and high-toughness soft magnetic stainless steel profile synergistically strengthened by Ta and Cu of the present application can be effectively applied to electromagnetic valves and related products that serve in low-temperature medium and require certain strength and toughness, and has good popularization prospect and application value.

The invention discloses a high-performance nickel-based high-temperature alloy for a gas turbine blade and a preparation method of the high-performance nickel-based high-temperature alloy. The nickel-based high-temperature alloy comprises the following components in percentage by mass: 0.05 to 0.15 percent of C, 13.5 to 14.5 percent of Cr, 9.0 to 11.0 percent of Co, 1.0 to 2.0 percent of Mo, 3.8 to 4.8 percent of W, 3.5 to 4.5 percent of Al, 2.2 to 3.2 percent of Ti, 4.2 to 5.2 percent of Ta, 0.01 to 0.1 percent of RE and the balance of Ni and inevitable impurities. According to the preparation method, alloy components are optimized, and the size of a phase serving as a main strengthening phase in the nickel-based high-temperature alloy is optimized by introducing two rare earth elements Y or Ce, so that the strength of the as-cast alloy at the room temperature is improved, and the application range of the alloy is widened.