11results about How to "Promote spheroidization" patented technology

The invention relates to a low-carbon high-plasticity hot-rolled wire rod for a 1860MPa-grade stranded wire and a manufacturing method of the low-carbon high-plasticity hot-rolled wire rod. C-Si-Mn-Cr components are subjected to hot-rolled spinning to form a wire rod, and then the wire rod is subjected to online molten salt isothermal treatment, so that the wire rod is cooled at a cooling speed of greater than or equal to 34 DEG C / s and enters a sorbite phase region from an austenite state to form a structure taking sorbite as a main part, and isothermal tempering is carried out, so that the low-carbon high-plasticity hot-rolled wire rod is obtained. And finally, slow cooling is conducted through a roller way, the hot-rolled wire rod with the microstructure comprising not less than 89% of tempered sorbite and the balance of tempered ferrite and microspheroidized carbide is prepared, the carbon content can be reduced, the material cost can be further reduced, the export tax refund requirement can be met, the abnormal structure precipitation risk is effectively reduced, and the structure uniformity is improved. According to the method, the strength of the steel wire rod is matched with the high plasticity, the tensile strength is 1190-1240 MPa, the percentage reduction of area is 49%-54%, and the yield and the use performance of the 1860 MPa grade steel strand can be improved.

The invention relates to a green and efficient production method of nodular cast iron or spheroidal graphite cast steel profiles, which adopts a process route of a hydrogen-rich blast furnace, an electric arc furnace, a converter, a vacuum refining furnace, a ladle refining furnace and a continuous casting machine to produce nodular cast iron / spheroidal graphite cast steel new steel material profiles. In the production process, a large amount of clean low-carbon hydrogen energy is used for replacing an original carbonaceous material to serve as a reducing agent, on one hand, the ton iron carbon emission of the product is reduced, on the other hand, oxygen, sulfur, phosphorus and other impurity elements in the material are deeply removed, and meanwhile liquid solidification of the nodular cast iron / spheroidal graphite cast steel material is achieved in a continuous casting mode; the production efficiency is improved; and the energy consumption and carbon emission of the product are further reduced.

The utility model discloses a spheroidizing shaper for graphite, which belongs to the field of graphite spheroidizing and comprises an equipment main body, a driving motor is arranged at the bottom of the equipment main body, and an output shaft of the driving motor is fixedly connected with a rotating shaft; through the arrangement of the spheroidizing assembly, three acting forces of inclined collision, curved surface rolling and reverse shearing are realized, the graphite particles are subjected to curved surface rolling force in the moving process through volute grooves formed in a grinding disc and a base disc and auxiliary teeth on a rotating disc, and spheroidizing of the particles is further promoted; when the spheroidizing device is used for spheroidizing the graphite particles, the particles are subjected to reverse shearing force between the spheroidizing device and the spheroidizing device, the force is beneficial to eliminating burrs and unevenness on the surfaces of the particles, the spheroidized graphite particles are smoother and more round, efficient spheroidizing of the graphite particles is achieved through the synergistic effect of the triple acting force, the spheroidizing rate and the spheroidizing quality are remarkably improved, the number of times of repeated machining is reduced, and the spheroidizing efficiency is improved. And the production cost is reduced.

The invention discloses a deep-sea acid-resistant pipeline steel and a production method thereof, which relate to the technical field of steel production. The steel has the following chemical composition and mass percentage: C: 0.010%-0.040%, Si: 0.10%-0.30%, Mn: 1.00%-1.40%, P≤0.013%, S≤0.0010%, Nb: 0.030%-0.070%, V: 0.30%-0.70%, Ti: 0.008%-0.030%, Cr: 0.10%-0.30%, Ni: 0.10%-0.30%, Mo≤0.50%, Cu: 0.10%-0.30%, B≤0.0005%, Mg: 0.0008%-0.0015%, Al: 0.015%-0.030%, and the balance is Fe and unavoidable impurities. Top and bottom combined blowing, converter smelting and vacuum degassing are adopted to obtain high-cleanliness molten steel. Continuous casting with large reduction technology and controlled rolling process are used to obtain a microstructure type dominated by blocky ferrite, which meets the requirements of deep-sea acid-resistant pipeline steel for service.

The invention belongs to the technical field of titanium alloy preparation, and particularly relates to a TC25 titanium alloy bar with high thermal stability and a preparation method and application thereof. The titanium alloy bar comprises the following components in percentage by weight: 6.4%-6.8% of Al, 1.5%-2.5% of Mo, 2.0%-3.0% of Zr, 1.5%-2.5% of Sn, 0.5%-1.5% of W, 0.20%-0.30% of Si, 0.060%-0.090% of O and the balance of Ti and inevitable impurities, wherein the total amount of impurity elements does not exceed 0.2%; by reducing the content of two alpha-phase stable elements of Al and O, the precipitation tendency of an alpha2 phase in the forging process can be reduced, and the plasticity and toughness of the material are improved; the content of O is reduced, so that the embrittlement effect of the near surface layer of the bar is avoided, and the thermal stability of parts is effectively improved; and the contents of Zr, Sn and other elements with low electron concentration are properly increased, and the room-temperature and high-temperature strength is ensured.

The invention belongs to the technical field of aluminum alloy casting, and relates to a casting forming method of an aluminum alloy with high thermal cracking tendency. The method comprises the following steps: adding refined powder into an aluminum alloy melt, and uniformly dispersing to obtain a mixed melt; the refined powder is micron-sized Ti powder embedded with nano-sized TiX powder, and X is selected from at least one of C and N; the mixed melt is cooled to be in a solid-liquid mixed state, aluminum alloy slurry is obtained, and the solid content of the aluminum alloy slurry is 40%-50%; and the aluminum alloy slurry is subjected to die-casting forming, and the aluminum alloy casting is obtained. By means of the preparation method, cracks of the aluminum alloy casting with the high thermal cracking tendency can be effectively eliminated, and the strength and plasticity of the casting are synchronously improved.

The invention relates to a powder particle surface micro-shaping method and a powder particle surface micro-shaping device. The powder particle surface micro-shaping method comprises the following steps: grinding powder particles in a grinding system by adopting a grinding medium under a preset temperature condition; gas is conveyed into the grinding system; the gas can stir powder particles and drive the powder particles to be in contact with the grinding medium; and when the mass of the powder particles meets the preset mass requirement, the powder particles are driven out of the grinding system by the gas. The technical problem to be solved is how to provide the powder particle surface micro-shaping method, corners of powder particles in irregular shapes are trimmed, polished and rounded, the powder particles are processed into powder particles with uniform sizes and regular shapes, and the flowability of slurry prepared from powder is improved.

This invention belongs to the technical field of automotive steel manufacturing, specifically relating to a green, low-carbon high-strength automotive steel and its preparation method. The invention adds nickel-doped modified niobium carbide to the high-strength steel, dispersing it in the iron matrix to effectively improve the strength and toughness of the steel plate and increase its porosity. Simultaneously, the addition of Ca, Mg, and lanthanum and cerium carbonate as composite refining agents to the alloy melt improves casting quality and mechanical properties. Furthermore, precise control of the composition of elements such as C, Mn, Si, Cr, Mo, Cu, and Ti, combined with hot rolling, cold rolling, continuous annealing, or hot-dip galvanizing processes, enables the material to possess both high strength and excellent porosity.

The invention discloses a high-efficiency low-energy-consumption spheroidizing annealing process for weathering resistant steel BNH8 for a high-strength bolt, and relates to the technical field of spheroidizing annealing. According to the method, nano graphene is added before solidification forming of weathering resistant steel BNH8 melt, and spheroidizing annealing is carried out after ultrasonic treatment. Carbon atoms in the steel can be more easily diffused and spheroidized during spheroidizing annealing due to the layered structure of the nano graphene, the interface bonding force between the graphene and the steel can be improved through the ultrasonic waves, the cavitation effect can be generated, more nucleation cores are formed in the steel, and meanwhile, the mechanical property of the steel is improved. In the spheroidizing annealing process, graphene and carbon atoms in the steel can be crosslinked through ultrasonic treatment, a larger layered structure is formed, formation and spheroidizing of carbides in the steel are further promoted, in this way, the effect of the spheroidizing annealing process can be effectively improved, and energy consumption of the spheroidizing annealing process is reduced. The high-efficiency and low-energy-consumption spheroidizing annealing process of the weathering resistant steel BNH8 for the high-strength bolt, provided by the invention, has the effects of high efficiency and low energy consumption.

The invention provides high-strength corrosion-resisting steel and a manufacturing method of the high-strength corrosion-resisting steel, and provides the high-strength corrosion-resisting steel and the manufacturing method of the high-strength corrosion-resisting steel. 0.07 to 0.15% of Ni; 0.25 to 0.40 percent of Cu; 0.05% to 0.15% of W; 0.040 to 0.070 percent of Alt (aluminum nitride); 0.05 to 0.10 percent of Sb; 0.010 to 0.025 percent of Ti; the content of Nb is 0.020 to 0.040 percent; the content of Ca is 0.0010 to 0.0035 percent; 0.05 to 0.08 percent of C; 0.15 to 0.35 percent of Si; 0.50 to 0.70 percent of Mn; p < = 0.012%; s < = 0.002%; n < = 40 ppm; o is less than or equal to 30 ppm, and the balance is Fe and inevitable inclusions. Through the process design of controlled rolling, sectional cooling and heat preservation pit slow cooling, the product has high strength, high toughness and excellent strong acid and strong alkali corrosion resistance, and the cost is greatly reduced compared with stainless steel and aluminum alloy.

The application provides a high-strength high-conductivity heat-resistant aluminum alloy wire and a preparation method thereof. The aluminum alloy wire comprises the following components in percentage by mass: Ce 0.05-0.25%, La 0.03-0.20%, Sc 0.10-0.35%, Y 0.08-0.30%, Fe 0.10-0.40%, Si 0.02-0.20%, Ti+V+Cr < 0.005%, other impurities < 0.01% individually, < 0.05% in total, and the balance being Al. The aluminum alloy wire comprises micron-sized spherical composite bodies and nanometer-sized Al3Sc precipitates. The spherical composite bodies comprise Fe-rich phases and Si-rich phases. The Fe-rich phases comprise Al, Fe and Y. The Si-rich phases comprise Al, Si, Ce, La and Y. The aluminum alloy wire according to the application can realize the synergistic improvement of high strength, high conductivity and excellent heat resistance.