86results about How to "Uniform and stable tissue" patented technology

The invention discloses a high-temperature resistant turbine blade. The turbine blade comprises the following chemical components in percentage by weight: 0.19-0.21% of C, 0.55-0.57% of Mn, 0.20-0.22% of Si, 0.38-0.40% of Al, 0.30-0.32% of V, 0.40-0.42% of Ti, 0.12-0.14% of Ni, 0.06-0.08% of Sn, 0.25-0.27% of Zr, no more than 0.025% of S, no more than 0.025% of P, no more than 0.20% of Cu, 0.20-0.22% of lanthanide serial rare earth, and the balance Fe. The invention further designs a production process of the turbine blade. The production process has the advantages of simplicity and low cost, helps to largely improve the impact toughness of the blade, enhance the high temperature resistance of the blade and prolong the service life of the blade through the nitridation surface treatment.

The invention belongs to the technical field of die steel and particularly relates to H13 die steel and a production method of the H13 die steel. The H13 die steel comprises chemical components including, by weight, 0.32%-0.45% of C, 0.80%-1.20% of Si, 0.20%-0.50% of Mn, 4.75%-5.50% of Cr, 1.10%-1.75 of Mo, 0.80%-1.20 of V, not larger than 0.25% of Cu, not larger than 0.25% of Ni, larger than andequal to the sum of 2.726 C and 0.183 Si and smaller than or equal to the sum of 3.283 C and 0.179 Si of the sum of Mo, Nb and Ti and the balance Fe and inevitable impurities. By the adoption of the H13 die steel and the production method, the content of harmful elements in the steel is strictly controlled, the content of inclusions in the steel is reduced through a reasonable refining process, and it is ensured that the die steel has good cleanliness; with large compression ratio rolling, the compression ratio is larger than or equal to 15, and the internal structure of an H13 rolled materialis dense; and the transverse and longitudinal unnotched impact of the steel are both larger than or equal to 280 J, and the ratio of the transverse unnotched impact energy to the longitudinal unnotched impact energy is larger than 0.8.

The invention discloses a steel ring billet casting technique based on casting and rolling combined forming. The steel ring billet casting technique based on casting and rolling combined forming comprises the steps that firstly, a casting mold is manufactured by means of water glass sand, the casting mold is dried and sprayed with painting, casting raw materials of a steel ring are smelted and are poured into the casting mold, and normalizing, tempering and quenching-tempering heat treatment are conducted on a steel ring billet formed through pouring; secondly, the steel ring billet is cooled to the room temperature, and polishing and machining are conducted on the cooled steel ring billet; finally, the steel ring billet which can be directly used for casting and rolling combined forming is obtained. According to the steel ring billet cast according to the technique, the defects, such as shrinkage cavities, shrinkage porosity and segregation, appearing in the steel ring billet casting process can be reduced, grains are refined to the maximum extent, and the high-quality steel ring billet capable of meeting the requirement for the ring rolling performance is manufactured; due to the fact that the processes of the casting and rolling combined forming technique are simplified, the quality and performance of the ring rolling technique and a ring workpiece are guaranteed.

The invention relates to hot-working die steel and an efficient preparation method thereof. The hot-working die steel comprises, by weight, 0.34%-0.45% of C, 1.00%-1.40% of Si, 0.50%-0.60% of Mn, lessthan or equal to 0.015% of P, less than or equal to 0.015% of S, 5.00%-6.00% of Cr, 1.00%-1.20% of Mo, 0.08%-0.12% of Nb, 1.00%-1.30% of Ni, and the balance Fe and inevitable impurities. The preparation method has the advantages that the alloy components are optimized, and mechanical diffusion and thermal diffusion are adopted to jointly act, so that the components of the hot-working die steel are homogenized, the time required for homogenization of the alloy elements is shortened, the production efficiency is improved, the production cost is reduced, the produced hot-working die has the Rockwell hardness of 55-57 HRC, the isotropic performance is good, and the thermal stability is good.

The invention provides a turbine blade capable of enhancing impact toughness, which comprises the following chemical components in percentage by mass: 0.13-0.15% of C, 0.8-0.9% of Si, 0.5-0.8% of Mn, 14-16% of Cr, 0.1-0.3% of Ni, 1.3-1.5% of Cu, 0.6-1.1% of Mo, 0.1-0.15% of W, 0.36-0.45% of V, 0.5-0.8% of Nb, 0.28-0.30% of Al, 0.16-0.18% of Ti, 0.08-0.10% of B, 0.45-0.48% of Na, at most 0.02% of S, at most 0.03% of P, 0.3-0.6% of rare-earth metal and the balance of Fe. The invention also provides a production technique of the turbine blade capable of enhancing impact toughness. The production technique can greatly enhance the impact toughness of the blade and prolong the service life of the blade.

The invention discloses a medium-strength nitric acid corrosion-resistant titanium alloy. The titanium alloy is composed of the following components of, in percentage by mass, 5.0-7.0% of Ta, 0.7-1.5%of Al, 0.2-2% of Zr, 0.6-1.5% of Mo, 0.2-2% of Nb, and the balance Ti and inevitable impurities. The tensile strength of the annealed titanium alloy subjected to annealing treatment is 670-750 MPa, the yield strength of the annealed titanium alloy is 520-650 MPa, and the corrosion rate of the annealed titanium alloy in a boiling nitric acid solution with the concentration of 6 mol/L is not higherthan 0.08 mm/a. According to the medium-strength nitric acid corrosion-resistant titanium alloy, through adjusting the content of each element in the titanium alloy, the medium-strength nitric acid corrosion-resistant titanium alloy has excellent tensile strength, yield strength, corrosion resistance and impact toughness, also has excellent cold and hot processing properties, can be prepared intovarious processed products, and is suitable for manufacturing related equipment in the fields of nuclear industry and chemical industry.

The invention provides a manufacturing method for producing a drill stem joint from a seamless steel tube. The manufacturing method comprises the following steps: preparing continuously cast circulartube blank through processes of smelting, external refining, vacuum degassing and casting in sequence; performing heating treatment on the prepared continuously cast circular tube blank; performing hole-piercing, tube-rolling and reducing and sizing treatment on the tube blank obtained by heating treatment, and cooling the tube blank to the room temperature, thereby obtaining a seamless steel tube; performing tempering treatment on the stainless steel tube; performing ultrasonic flaw detection on the tempered seamless steel tube on automatic flaw detecting lines, and ensuring that the surfaceand internal quality of the stainless steel tube is free of defects; unloading the qualified seamless steel tube subjected to ultrasonic flaw detection, turning and processing to define the finished product drill stem joint. The manufactured drill stem is uniform and stable in integral structure and mechanical property. The manufactured drill stem joint has section hardness fluctuation within 3HRC(25HBW), and can control strength fluctuation within 70 Mpa.

The invention discloses a magnesium alloy profile material for an automobile oil tank. The magnesium alloy profile material comprises the following components of, by mass, 8%-15% of Al, 2%-4% of Mn, 10%-13% of Zn, 1%-3% of Ni, 7%-9% of Ca, 1%-3% of Cu, 1%-3% of Sc, 0.2%-0.3% of P, 1%-3% of Zr, 2%-4% of B, 0.1%-0.4% of V, 0.002%-0.004% of Nb, 2%-5% of So, 0.01%-0.03% of C, 2%-4% of Co, 0.2%-0.5% of Fe, 0.5%-0.8% of rare earth elements, and the balance Mg. The invention further relates to a preparation method for the magnesium alloy profile material for the automobile oil tank. The preparation method is simple and easy to operate, the prepared oil tank has good corrosion resistance, the service life is long, and the cost is low.

The invention relates to a drug breaking and grinding device which comprises a breaking system, a grinding system and a power and transmission system. Through the improvement and reasonable arrangement of the various components, breaking and grinding are separated, so that the working efficiency is improved. In addition, with the creative adoption of the grinding system in which grinding balls are matched with a grinding internal barrel and a grinding external barrel, the grinding efficiency and the product quality are improved.

The invention discloses a material for magnesium alloy doors and windows. The material for the magnesium alloy doors and windows is composed of Mg, Al, Mn, Zn, Cu, Ni, Sc, P, Zr, Y, Ca, Sr, B, Co and a rare earth element, wherein the rare earth element is composed of Ce, Nd, Gd, Pr, Dy, Yb, La and Sm; the invention further discloses a production method of the material for the magnesium alloy doors and windows, and the method comprises the following steps: smelting, heat treatment, forging, quenching and tempering heat treatment, cooling, checking and storing, the production method is simple and easy, the manufacturing cost is low, and the produced material for the magnesium alloy doors and windows is excellent in corrosion resistance, can resist high temperature, is solderable, and has a prolonged service life.

The invention discloses a turbine blade capable of improving the thermal cracking resistance. The turbine blade comprises the following chemical components in percentage by mass: 0.31-0.35% of C, 0.10-0.12% of Si, 0.75-0.77% of Mn, 0.63-0.65% of Ni, 11.2-11.7% of Cr, 0.65-0.68% of Mo, 0.16-0.18% of V, 0.85-0.88% of Sr, 0.15-0.17% of Nb, 0.05-0.07% of Cu, 0.27-0.29% of Al, 0.13-0.15% of Ti, 0.06-0.08% of B, less than or equal to 0.02% of S, 0.21-0.35% of rare earth metal and the balance of Fe. By adopting the turbine blade, the impact toughness of a blade is greatly improved, the thermal cracking resistance of the blade is improved, and the service life of the blade is prolonged.

The invention discloses a CrCuNiMoV high-entropy alloy material and a preparation method thereof, and belongs to the field of alloy material preparation. The CrCuNiMoV high-entropy alloy is prepared from the elements such as Cr, Cu, Ni, Mo and V. The preparation method comprises the following steps of (1) weighing materials: weighing various metal materials according to the equal molar ratio; and(2) melting the alloy: using a non-self-consumed vacuum arc melting furnace for repetitively melting the weighed materials for more than four times. The CrCuNiMoV high-entropy alloy prepared through the invention is provided with main composition phases: an FCC phase and a small number of Laves phase, has the advantages of wear resistance and corrosion resistance, and has a good application prospect in the fields of wear resistance and corrosion resistance.

The invention discloses heat-resistant alloy carburizing steel. The heat-resistant alloy carburizing steel comprises the following components of, by weight percentage, 0.16-0.22% of C, less than or equal to 0.15% of Si, less than or equal to 0.60% of Mn, 0.10-0.25% of Cu, 1.80-1.90% of Cr, 1.80-1.90% of Ni, 0.50-1.10% of Mo, 0.015-0.030% of S, less than or equal to 0.015% of P, 0.010-0.025% of Al,0.013-0.018% of N, 0.020-0.040% of Nb, less than or equal to 0.00015% of H, less than or equal to 0.0012% of O, and the balance Fe and impurity elements. The invention further discloses a preparationmethod of the heat-resistant alloy carburizing steel. According to the heat-resistant alloy carburizing steel and the preparation method thereof, the heat-resisting alloy carburizing steel with 300-500 DEG C working temperature resistance, fine crystal grains, high purity and excellent strength and toughness performance can be obtained.

The invention discloses a corrosion-resistant turbine blade which comprises the following chemical components in percentage by mass: 0.29-0.31 percent of C, 0.11-0.13 percent of Si, 0.69-0.73 percent of Mn, 0.60-0.62 percent of Ni, 9.5-9.7 percent of Cr, 0.15-0.17 percent of V, 0.16-0.18 percent of Nb, 0.05-0.07 percent of Cu, 0.21-0.23 percent of Al, 0.13-0.15 percent of Ti, 0.75-0.77 percent of Sb, 0.82-0.88 percent of Co, less than or equal to 0.03 percent of S, less than or equal to 0.02 percent of P, 0.09-0.12 percent of rare earth metals and the balance of Fe. The water erosion resistance and corrosion resistance of the blade can be improved, so that the service life of the blade is prolonged.

The invention provides a continuous friction stir extrusion production method and production device for an ultra-fine grain material. A pair of extrusion wheels is symmetrically arranged, and synchronously rotates in opposite directions to drive at least two blank materials to enter a die cavity from the two sides; a stir bar extends into the die cavity via a center hole of the die cavity to directly reach a converging zone of the at least two blank materials; friction stir processing of the blank materials is realized by rotation of the stir bar; the metal blank materials are fed into a stirzone continuously through rotation of the extrusion wheels; finished product blank materials are rapidly cooled after being extruded by an opening of an extrusion die to form continuous large-length ultra-fine grain type wire products; and forced cooling is performed on the interior of the stir bar through a cooling medium in an operation course.

The invention provides carburizing steel for an oil nozzle valve body and a preparation method of the carburizing steel. The carburizing steel mainly comprises carbon, manganese, copper, chromium, nickel, sulphur, aluminum, nitrogen and niobium. The preparation method of the carburizing steel comprises the following steps of conducting preliminary smelting; conducting steel ladle refining; conducting continuous pouring; rolling a bar material or a wire material; and drawing the bar material or the wire material till the surface is glossy. The carburizing steel and the preparation method thereof have the beneficial effects that after annealing is conducted on the steel for the oil nozzle valve body, a nodulizing pearlitic structure is obtained; hardness carbide particles are fine and uniform in size, and the hardness ranges from 185 HBW to 210 HBW; cutting and trepanning machining of the oil nozzle valve body can be conducted conveniently; and meanwhile, a prepared structure is providedfor subsequent carburization and quenching heat treatment.

The invention discloses steel for a front axle of a medium-sized truck and a production method of the steel. The steel comprises the following chemical components including, by weight, 0.39% to 0.43% of C, 0.20% to 0.37% of Si, 0.65% to 0.80% of Mn, 0.95% to 1.10% of Cr, 0.01% to 0.05% of Mo, 0.02% to 0.03% of Ni, 0.02% to 0.05% of Cu, less than or equal to 0.020% of P, 0.010% to 0.025% of S, 0.010% to 0.040% of Alt and the balance Fe and other inevitable impurities, so that the contents of Mo, Ni and Cu in the steel meet the condition that the sum of Mo, Ni and Cu is more than or equal to the sum of 0.013C, 0.033Mn and 0.034Cr and less than or equal to the sum of 0.018C, 0.026Mn and 0.065 Cr. According to the steel for the front axle of the medium-sized truck and the production method of the steel, the contents of Mo, Ni, Cu and other elements in the steel are accurately controlled, steel grains are refined, the impact toughness of the steel is improved, and the fatigue life of the automobile front axle is prolonged.

The invention discloses a processing technology of a corrosion-resistant butterfly valve flap. The processing technology comprises the steps of raw material preparation, compression, sintering molding, heat treatment, phosphating treatment, inspection and warehousing. The processing technology is simple and easy to operate, the processed butterfly valve flap has good corrosion resistance, the service life is prolonged and the cost is reduced.

The invention provides a preparation technology of a graphene oxide toughened alumina-based ceramic cutter, and relates to the technical field of ceramic cutters. The preparation technology comprisesthe following steps: (1) adding graphene oxide into anhydrous ethanol, and adding polyethylene glycol and alumina powder to obtain a powder slurry I; (2) mixing anhydrous ethanol with polyethylene glycol, and adding beta-SiC nanoparticles, TiC whiskers and a sintering aid to obtain a powder slurry II; (3) performing ball milling to obtain a composite slurry; (4) drying and sieving the composite slurry to obtain a composite powder; (5) carrying out pre-pressing forming; and (6) carrying out vacuum hot-pressing sintering on the obtained pre-pressed green body. The graphene, TiC whiskers and beta-SiC nano-particles have synergistic effects, so the reinforcing and toughening effects are good, the dispersity of all the raw materials in the preparation process is high, and the prepared ceramic cutter has excellent mechanical properties, high toughness and strength and good wear resistance.

The invention provides a turbine blade capable of enhancing water corrosion resistance, which comprises the following chemical components: 0.26-0.28% of C, 0.13-0.15% of Si, 0.75-0.77% of Mn, 0.63-0.65% of Ni, 10.5-10.7% of Cr, 0.65-0.67% of Mo, 0.16-0.18% of V, 0.82-0.84% of Sr, 0.15-0.17% of Nb, 0.05-0.07% of Cu, 0.24-0.26% of Al, 0.13-0.15% of Ti, 0.06-0.08% of B, at most 0.03% of S, at most 0.03% of P, 0.12-0.15% of rare-earth metal and the balance of Fe. The production technique can greatly enhance the impact toughness of the blade, enhance the water corrosion resistance and corrosion resistance of the blade and prolong the service life of the blade.

The invention discloses a special steel of a high-wear-resistance bearing. The blank comprises the following chemical components in percentage by mass: 0.21-0.23% of C, 0.07-0.09% of Si, 0.66-0.68% of Mn, 0.83-0.85% of Ni, 9.1-9.3% of Cr, 0.55-0.57% of Mo, 0.13-0.15% of V, 0.11-0.13% of Nb, 0.01-0.03% of Cu, 0.19-0.21% of Ti, 0.05-0.07% of B, at most 0.025% of S, at most 0.015% of P, 0.12-0.14% of rare-earth metal and the balance of Fe. The rare-earth metal comprises the following chemical components in percentage by mass: 2-4% of cerium, 11-13% of neodymium, 3-5% of gadolinium, 4-6% of lutetium, 5-7% of dysprosium, 1-3% of europium, 8-10% of erbium and the balance of lanthanum. The invention also discloses a processing technique of the high-wear-resistance bearing, which comprises the following steps: forging, annealing, tempering, turning, carburizing and heat treatment. The product has the characteristics of high working size precision, stable inherent quality, excellent properties, long service life and high reliability.

The invention discloses a special steel material for a high-strength bearing and a machining process of the high-strength bearing. A blank comprises the following chemical components in percentage by mass: 0.24-0.26% of C, 0.10-0.12% of Si, 0.95-0.97% of Mn, 0.45-0.47% of Ni, 6.3-6.5% of Cr, 0.26-0.28% of Mo, 0.32-0.34% of Sr, 0.08-0.10% of Nb, 0.03-0.05% of Cu, 0.17-0.19% of Al, 0.26-0.28% of Ti, not more than 0.01% of S, not more than 0.02% of P, and 0.15-0.17% of rare earth metals, the balance being Fe, wherein the rare earth metals consist of the following chemical components in percentage by mass: 3-5% of praseodymium, 11-13% of neodymium, 9-11% of promethium, 3-5% of gadolinium, 2-4% of lutecium, 6-8% of europium, 1-3% of terbium and 4-6% of holmium, the balance being erbium. The invention further discloses the machining process of the high-strength bearing; and the machining process comprises the steps of forging, annealing, tempering, turning, carburizing and heat treatment. The produced bearing has the characteristics of high machining size precision, stable inherent quality, excellent performance, long service and high reliability.