37results about How to "No recrystallization" patented technology

The invention provides a low-damage processing method of film holes in a single crystal high-pressure-turbine hollow blade of an aircraft engine. The low-damage processing method comprises the following steps: wiping the surface of the blade through degreasing cotton with absolute alcohol; transferring into a drying box to dry; arranging a clamp on a machine table, and aligning; assembling the dried blade on the clamp and locking; presetting scanning system parameters; scanning the blade; saving axis moving coordinate value of each hole to be processed under an automatically-generated machine coordinate system as a *.xls file; importing and generating a hole position file; performing compensative correction on the deviation value of a focus position of the hole to be processed; and setting the optimized laser processing technological parameters through a main processing interface. With the adoption of the low-damage processing method, the processed hole is outstanding in quality; a remelting layer, microcacks and recrystallization can be avoided after the single crystal material is processed, so that subsequent processing can be saved, and as a result, the fatigue life and the processing cycle of the blade can be prolonged and improved; the ablation threshold of the single crystal material can be effectively reduced; the recrystallization of the single crystal material can be avoided.

This invention discloses a double-stage forced solutionizing method for manufacturing a high-strength flexible alumina alloy. The method comprises the steps of: (1) performing a first stage solutionizing method at 430-460 deg.C for 1-3 h; and (2) performing a second stage solutionizing method at 460-500 deg.C for 1-3 h. The method can ensure the remelting of the precipitated phase during performing and hot-pressing processes, while recystallization and crystal grain growth can be avoided. Therefore, the precipitated phase can be uniform and fine during the subsequent aging treatment. The alumina alloy manufactured by this method has improved ultimate tensile strength and yield strength (by 3-10%), elongation percentage (by 1-5%), fracture ductility, fatigue resistance and stress corrosion resistance.

A process for preparing high-purity pentazolol features the reaction between 1-(4-chlorphenylethyl)-1-tert-butyl-1, 2-epoxy ethane and 1,2,4-triazole in organic polar solvent under existence of alkali while adding catalyst chosen from N,N-dimethyl-4-aminopyridine, N,N-dimethylphenylamine, methylphrrolidone, dimethyl formamide, methanol sodium, ethanol sodium, potassium hydroxide and sodium hydroxide. Its advantages are high output rate and high purity.

The invention provides a preparation method for a lithium ion battery anode active material. The preparation method comprises the following steps of: 1) uniformly dispersing acidified graphite in an organic polymer to obtain a mixed system; 2) adding an organic metal salt solution into the mixed system with stirring, wherein the solute of the organic metal salt solution contains organic tin and organic cobalt, and the solvent of the organic metal salt solution is an organic solvent; and 3) drying the mixed system, and sintering the mixed system at 500 to 900 DEG C to obtain the lithium ion battery anode active material. The preparation method for the lithium ion battery anode active material is simple in process; and a battery adopting the anode active material has high capacity and high cycling performance.

The invention relates to the technical field of connection of heterogeneous materials and particularly relates to a tungsten copper module for a high thermal load part of a fusion device as well as a preparation method thereof. The method comprises the following steps: 1) selecting tungsten, anaerobic pure copper and a chromium zirconium copper alloy heat sink material in appropriate size; 2.1) pre-treating surfaces of tungsten and anaerobic pure copper; 2.2) carrying out vacuum-casting on the anaerobic pure copper on the surface of tungsten; 3.1) pre-treating the surface of the anaerobic pure copper in a tungsten/anaerobic pure copper block and a to-be-welded face of a chromium zirconium copper alloy; 3.2) welding the tungsten/anaerobic pure copper block and the chromium zirconium copper alloy in a vacuum hot pressed furnace; and 3.3) machining a welded tungsten/anaerobic pure copper/chromium zirconium copper alloy compound block to form the required tungsten copper module. The preparation method of the tungsten copper module is low in cost, high in efficiency and high in reliability and the tungsten copper module can bear a steady state thermal load which is greater than 5MW/m<2>.

The invention belongs to the technical field of welding, and particularly relates to a high-performance brazing method for a Ni3Al-based single crystal alloy. A novel high-temperature-resistant Ni-Cr-W-Mo-Si brazing filler metal is applied, and a brazing process suitable for the brazing filler metal and the Ni3Al-based single crystal alloy is provided. The brazing process mainly includes the stepsof cleaning before brazing, assembling and positioning, brazing filler metal presetting, vacuum brazing, and heat treatment after welding. By means of the brazing filler metal and the process, an excellent brazed joint structure can be obtained; a brazing seam and a base metal interface are well combined; meanwhile, the brazing seam is free of welding defects and low in melting point phase; and aNi3Al-based single crystal alloy brazed joint brazed according to the process has the high mechanical property meeting the using requirement.

The present invention relates to a hydrophobic associative cationic xanthan gum preparation method, which comprises: synthesizing epoxypropyl dodecyldimethylammonium chloride from N.N-dimethyldodecylamine and epichlorohydrin in acetone; and carrying out a reaction on the epoxy group in the quaternary ammonium salt and the hydroxyl group (-OH) in xanthan gum by using the epoxypropyl dodecyldimethylammonium chloride as a modifier to introduce the quaternary ammonium salt having a long alkyl chain into the xanthan gum so as to obtain the hydrophobic associative water-soluble xanthan gum having surface activity. According to the present invention, the reaction is performed in water, the reaction conditions are mild, the raw materials are easy to obtain, and the post-treatment of the product is easy; and the modified xanthan gum has low surface tension and good solubility, can reduce the viscosity of heavy oil through the emulsification effect, can change the wettability of the stratum surface, and can increase the fluidity of the heavy oil.

The invention provides a functional film prepared from functionalized organic powder, a low-temperature damage-free manufacturing method and application. The organic powder film material is composed of the functionalized organic powder and polytetrafluoroethylene (PTFE), polytetrafluoroethylene molecular chains are opened through preheated supersonic airflow, the functionalized organic powder is bonded, air in the powder is extruded to form a continuous cake shape, the powder forms a film through a low-temperature hot-pressing process, and then the film material with low porosity and uniform thickness is formed through a multi-layer film hot-pressing compounding process. According to the method, micron-sized organic films can be continuously prepared in a roll-to-roll mode, the physical and chemical properties of the organic powder can be brought into play to the maximum extent, and performance damage caused by high temperature or introduction of a solvent for film formation or anisotropy caused by recrystallization is prevented. No solvent is introduced in the manufacturing process, and the problems of environmental pollution, high energy consumption, uneven film material densityand the like caused in the solvent drying process are avoided.

The invention relates to a technological method for heat treatment to a titanium alloy welded component. The technological method comprises the following step (1) of removing oil stain from the surface of the titanium alloy welded component to be treated; the step (2) of adding a little water to high temperature anti-oxidation coatings for dilution, and mixing the water and the coatings uniformlyto obtain high temperature anti-oxidation coating aqueous solutions, and coating the aqueous solutions on the surface of the titanium alloy welded component to be treated; the step (3) of clamping andfixing the titanium alloy welded component to be treated with a tool after drying the high temperature anti-oxidation coating aqueous solutions; the step (4) placing the titanium alloy welded component clamped and fixed with the tool properly into a resistance furnace, and setting heat treatment process parameters, wherein the annealing temperature Tm is 500-600 DEG C, the temperature rise time tis 1.5-2.0 h, and the holding time tm is 2.0-2.5 h; cooling the titanium alloy welded component in the furnace to 200 DEG C and below, taking out the titanium alloy welded component from the furnace,and air-cooling the titanium alloy welded component to room temperature; and the step (5) of cleaning the coatings on the surface of the titanium alloy welded component. Compared with the prior art,the technological method has the advantages of convenient operation, and high economy and adaptability.

An efficient rolling technology for continuous columnar crystal structure high-aluminum bronze sheet material belongs to the technical field of plastic processing of metal materials. The specific technology comprises the steps as follows: firstly, a blank is subjected to single-pass high-temperature rolling at the temperature range of 600 DEG C to 850 DEG C, and the rolling deformation is 60%-90%; water cooling is carried out after rolling; the subsequent warm rolling processing for 3 to 11 passes is carried out at the temperature range of 200 DEG C to 400 DEG C, and the deformation for each pass is controlled to be within 5%-20%. The total amount of finish for the sheet material is more than 95%, and the high-aluminum bronze sheet material does not contain a fragile precipitated phase after formation, is no longer recrystallized and has a continuous sheet-shaped crystal structure. The efficient rolling technology has the advantages that the processing technology with the combination of the single-pass hot rolling and multi-pass warm rolling is adopted, the alloy is no longer recrystallized, and the high-orientation structure is kept; the temperature for the first-pass rolling is high (600 DEG C to 850 DEG C), the pass deformation is large, and the processing efficiency is high; and the high-aluminum bronze sheet material subjected to subsequent warm rolling does not contain the fragile precipitated phase, has the continuous sheet-shaped crystal structure, and also has excellent mechanics, physical and chemical properties.

The invention discloses sun-screening agent spray. Sun-screening components with strong light sensitivity, an emollient, a solvent, a cooling agent, and the like are stored into an aerosol tank in anisolating mode through a bag, and a propellant is charged between the aerosol tank and the bag, wherein the cooling agent is preferably trans-1-chloro-trifluoropropene. The spray disclosed by the invention is cool, quick-drying and free of unpleasant smell. According to the invention, in use of a spray tank, a spray valve which can be rotated by 360 degrees is adopted to the operation and use of the sun-screening agent spray, and the sun-screening agent spray is safe (non-combustible), environmentally friendly (low-GWP and low-VOC), efficient and convenient, can effectively protect the effectiveness of a sun-screening agent within a quality guarantee period, and has cooling effect. The sun-screening agent spray disclosed by the invention is easy to carry, easy to use, easy to store, and safe and reliable, and has very excellent application performance.

The invention belongs to surface treatment technology and relates to an improved method for removing a remelted layer on a monocrystal nickel-base high-temperature alloy surface. The method comprises the following steps of: removing oil from the part surface; preparing a remelted layer removing solution; removing the remelted layer; and cleaning the part. The invention can not cause recrystallization on the monocrystal nickel-base high-temperature alloy surface and ensure that the performance of the part is free from adverse effects. Meanwhile, the invention enhances the work efficiency and reduces the cost.

The invention discloses a metal ceramic material, and belongs to the technical field of metal ceramic materials. The metal ceramic material comprises, by weight, 60-80 parts of a principal phase, 16-20 parts of a binding phase, 5-10 parts of carbide, 3-10 parts of an additive, 5-10 parts of whiskers and 5-10 parts of auxiliaries. SiC and/or TiC serve/serves as the whiskers, and carbon nano tubes serve as the auxiliaries. Through adding of the whiskers Sic and/or TiC and the auxiliary carbon nano tubes, the strength of the metal ceramic material is high, toughness is enhanced, and the application range of a metal ceramic cutter manufactured through a powder metallurgy manner is wide.

The invention discloses a manufacturing process of a metal ceramic material for a numerical control cutter, and belongs to the technical field of numerical control cutter materials. The manufacturingprocess comprises the steps of (1), mixing raw materials, and filtering after wet grinding to obtain mixed slurry; (2), carrying out spray drying granulation on the mixed slurry through a closed-circuit solvent recovery spray drying tower; (3), pressing the mixed granules obtained in the step (2) into a green body by adopting an extrusion method; and (4), placing the prepared green body into a degreasing and pressurizing integrated sintering furnace, vacuumizing and filling argon into the sintering furnace before heating, filling hydrogen to completely replace the argon after heating, fillingthe argon again to completely replace the hydrogen when the temperature is continuously heated to 500-600 DEG C after glue discharging is completed, vacuumizing with a pump, continuously heating to 1,350-1,550 DEG C, keeping the temperature for 8-12 minutes before refilling with the argon, keeping the temperature for more 40-60 minutes, and naturally cooling to room temperature after reducing thetemperature to 900 DEG C by de-energizing. The manufactured material has zero porosity, high toughness, uniform structure, excellent mechanical property and durability.