55results about How to "Reduce hydrogen absorption" patented technology

A filling grease for composite fibre-optical overhead earth wire is prepared by mixing 36®|hydrogenated white oil and PAO-8 synthesized oil with PriCO-3002 polybasic alcohol ester and viscosity exponential improver Lc-212, adding into additive OB fluorescent brightening agent, grease-separating inhibitor BP2400 and G1702, raising temperature, stirring, adding into organic thickening agent gas-phase carbon white H20, raising temperature, thickening, adding into antioxidant AT-215 and inorganic thickening agent SEP1650, raising temperature, thickening, shearing, circulation feeding back, cooling to normal temperature, homogenizing, degassing, filtering and obtaining the grease. It achieves good hydrogen absorption and stable fibre-optical transmitting performance.

The invention discloses a method for heating a titanium blank by using a continuous heating furnace. The heating temperature of the titanium blank is about 880 DEG C and is far lower than the heating temperature of about 1,200 DEG C of a steel blank; and if the titanium blank is heated by using a continuous heating furnace for heating the steel blank, over-high temperature or non-uniform heating is caused, and the over-high heating temperature causes the defects of rolling in a beta-phase area, thick and large tissue, serious surface oxidation and the like. The invention provides the method for heating the titanium blank by using the continuous heating furnace for heating the steel blank, wherein the thickness of the blank is 150 to 250 millimeters, and the titanium blank avoids a high-temperature flame area in a mode of furnace body radiation and furnace gas convection so as to achieve the effects of uniform heating temperature and good heating quality.

A zirconium alloy suitable for forming reactor components that exhibit reduced irradiation growth and improved corrosion resistance during operation of a light water reactor (LWR), for example, a boiling water reactor (BWR). During operation of the reactor, the reactor components will be exposed to a strong, and frequently asymmetrical, radiation fields sufficient to induce or accelerate corrosion of the irradiated alloy surfaces within the reactor core. Reactor components fabricated from the disclosed zirconium alloy will also tend to exhibit an improved tolerance for cold-working during fabrication of the component, thereby simplifying the fabrication of such components by reducing or eliminating subsequent thermal processing, for example, anneals, without unduly degrading the performance of the finished component.

The invention provides a titanium-based alloy material spinning forming method based on composite heating. The titanium-based alloy material spinning forming method comprises the steps that firstly, ablank, a central spindle and a spinning roller are preheated with a flame gun; and secondly, the blank is heated to the spinning temperature with a follow-up induction heating coil, the temperature is monitored with an infrared thermal imager in the spinning process, and heating and heat preserving are conducted on the blank in a spun area behind the spinning roller with the flame gun. Accordingto the titanium-based alloy material spinning forming method based on composite heating, two heating modes including front-end electromagnetic induction heat source heating and back-end flame source heat compensating are combined, the temperature is monitored with the infrared thermal imager, and then online heating and precise temperature controlling in the spinning forming process are achieved.Embodiment results show that when spinning forming is conducted on a titanium-based alloy through the method, an obtained spun part is uniform in wall thickness, has no cracking phenomenon, is high inquality and can not generate defects such as instability wrinkling in the spinning process.

The invention belongs to the fields of production aluminum oxide from coal ashes and metallurgy of aluminum and particularly relates to a method for extracting composite aluminum oxide from the coal ashes. The composite aluminum oxide can be used for producing an aluminum-silicon-based alloy as a partial substitute of a main raw material aluminum oxide of an aluminum electrolysis cell. A main scheme of the invention is as follows: optional constituents such as aluminum oxide (Al2O3) and silicon oxide (SiO2) in the coal ashes are not needed to be extracted respectively, only are the unused constituents in the coal ashes removed; or the oxides of some optional constituents are added into constituents of the to-be-produced aluminum-silicon alloy, so that the composite aluminum oxide containing aluminum oxide, silicon oxide and other optional constituents can be obtained; and the composite aluminum oxide can be used for replacing part of the main raw material aluminum oxide of the aluminum electrolysis cell to produce the aluminum-silicon-based alloy. The division for the optional constituents and the unused constituents of the coal ashes can be determined according to the chemical constituents (the chemical constituents of the coal ashes obtained by blending several coal ashes) of the coal ashes and the constituents of the produced aluminum-silicon alloy.

The invention provides an ultra-light high-modulus high-strength casting aluminum-lithium matrix composite and a preparation method thereof. The aluminum-lithium matrix composite comprises a matrix alloy and a strengthening phase, the matrix alloy comprises the following elements of, by mass, 2.5%-3.5% of Li, 1%-2.5 % of Cu, 0.4%-0.5% Mg, 0.15%-0.2% of Sc, 0.15%-0.2% Zr, 0-0.2% of Cd, less than 0.2% of the total content of impurity elements and the balance Al; and the strengthening phase is TiB2. The preparation method comprises the steps that Ti B2/Al base metal alloy is prepared by using in-situ synthesized reaction; and then the TiB2/Al base metal alloy, pure aluminum and Al-Cu, Al-Li and other intermediate alloys are smelted to obtain a composite, and after specific solid solution andaging treatment are carried out, the ultra-light high-modulus high-strength casting aluminum-lithium matrix composite is obtained. The ultra-light high-modulus high-strength casting aluminum-lithium matrix composite has higher strength and elastic modulus and lower density, and has lower cost meanwhile.

The invention discloses a hot galvanizing process. The hot galvanizing process is characterized in that thiourea with concentration being 0.12% is added during pickling, wherein a picking temperature is 50 DEG C, so that a workpiece can be prevented from being over-etched, and hydrogen absorption capacity of ferro matrix can be reduced; an ultrasonic cleaning agent with concentration being 7.5% is added during ultrasonic cleaning, so that greasy dirt and corrosion on the surface of a workpiece can be quickly removed; the ultrasonic cleaning agent is trichloro ethylene which does not contain phosphate, is harmless to aquatic life, is harmless to a human body and is free of stimulation on skin; the cooling comprises the following two steps: a first step, slow cooling, wherein a cooling speed is 10 DEG C/S, and the workpiece is cooled to a temperature of 650 DEG C; and a second step, quick cooling, wherein the workpiece is cooled by a cooling fan, and is cooled to a temperature of 445 DEG C, so that the structure of the workpiece can be prevented from being damaged; pure aluminum with concentration being 0.02% is added into a zinc pot before galvanizing, so that mobility, at a relatively low temperature, of a hot galvanizing solution is improved, a coating is prevented from being thickened, and the appearance of the coating is improved; a bearing produced by adopting the method has the advantages of corrosion resistance, great bonding strength of a galvanized coating and long usage time, is great in market potential and is wide in prospect.

The invention discloses a zirconium alloy material for a light water reactor under higher burnup. The zirconium alloy material comprises 0.10-0.40 weight% of tin, 0.50-1.50 weight% of niobium, 0.01-0.20 weight% of iron and 0.06-0.20 weight% of oxygen, and further comprises 0.01-0.09 weight% of vanadium and/or 0.01-0.09 weight% of copper and the balance of zirconium. The zirconium alloy has excellent corrosion resistance; and compared with the zirconium alloy in the prior art, the zirconium alloy has more excellent corrosion resistance in high-temperature pure water, and is suitable for fuel rod cladding materials and corrosion resistant zirconium alloy materials of grillwork strips and structural parts under higher burnout of nuclear reactors.

The invention relates to a friction stir butt welding device for a large-thickness titanium-nickel dissimilar material and a machining method of the friction stir butt welding device. The friction stir butt welding device comprises a workbench and a friction stir welding mechanism, the workbench comprises a fixed clamping device, the friction stir welding mechanism comprises friction stir weldingequipment, the output end of the friction stir welding equipment comprises a stirring head, and a gas protection mechanism is arranged at the stirring head; the friction stir butt welding device further comprises a laser output mechanism, the laser output mechanism comprises a plurality of second laser output mechanisms arranged on the upper portion of the gas protection mechanism; and a hollow placement groove is formed in the stirring head. By arranging the laser output mechanism, the gas protection mechanism or a current heating mechanism in the stirring head of conventional friction stir butt welding equipment, the problem of insufficient softening of the bottom of a to-be-welded area only during surface laser heating is solved, and the axial pressure of the stirring head in the welding process can be greatly reduced.

The invention provides a processing method for target materials to be processed. The processing method comprises the steps that the target materials to be processed are provided; the target materialsto be processed are subjected to first acid pickling treatment through a first acid solution to form initial target materials, and the first acid solution and the target materials to be processed aresubjected to a first chemical reaction to remove part of materials on the surfaces of the target materials to be processed; and the initial target materials are subjected to second acid pickling treatment through a second acid solution, and the second acid solution and the initial target materials are subjected to a second chemical reaction to remove part of materials on the surfaces of the initial target materials, specifically, the rate of the second chemical reaction is smaller than the rate of the first chemical reaction. By means of the processing method, the recovery rate of the target materials to be processed can be increased.

The invention discloses equipment capable of achieving vacuum quantitative casting of molten metal. The equipment comprises a mechanical device, a vacuum quantitative casting device, an opening and closing device and a control system; the vacuum quantitative casting comprises a seal container with internal space, a gas filling mechanism, a vacuum mechanism and an exhaust opening; the exhaust opening comprises a liquid draining opening allowing molten metal to be drained, a pipeline allowing gas to pass through is further arranged in the internal space, and passes through the liquid draining opening, the pipeline is provided with a gas exhaust opening allowing gas not in contact with the molten metal to be exhausted, the opening and closing device achieves independent control over the liquid draining opening and the gas exhaust oponeing, that is, the opening and closing device can independently control opening and closing of the liquid draining opening and the gas exhaust opening, it is ensured that during casing of the molten metal, the oxidation and hydrogen absorption of the molten metal can be reduced, gas holes and oxide inclusion of a casting are reduced, and the casting quality is improved.

The invention relates to the technical field of titanium coil production, and particularly discloses a pure-titanium cold-rolled bright-surface titanium strip production process which comprises the following steps: S1, heating a plate blank on a heating furnace, and then carrying out rough rolling and finish rolling to obtain a black-skin titanium coil; s2, intermediate annealing and shot blasting pickling are conducted on the obtained black-skin titanium roll on the hot line, and a pickled white roll is obtained; s3, cold rolling is conducted on the acid-washed white roll obtained in the step S2, and a cold-rolled titanium roll with the surface roughness Ra smaller than or equal to 0.6 micrometer is obtained; s4, the cold-rolled titanium coil is subjected to degreasing treatment on a degreasing line, and the degreasing uncoiling tension and the degreasing coiling tension are both 5-20 kN; s5, putting the cold-rolled titanium coil which is degreased cleanly into a vertical bell-type furnace, and performing recrystallization annealing treatment in an argon protective atmosphere; s6, the cold-rolled titanium coil treated in the step S5 is subjected to flattening treatment on a flattening machine, and the cold-rolled bright-surface titanium belt is obtained; the problems that a cold-rolled titanium strip manufactured through an existing process is high in surface roughness, the strip shape is difficult to control, and the strip shape is uneven can be solved.

The invention provides a zirconium-based alloy used in high-temperature environment of a nuclear reactor. Calculated by weight percentage, the zirconium-based alloy comprises 0.36-0.69% of Sn, 0.20-0.49% of Nb, 0.21-0.40% of Fe, 0.10-0.20% of O, 0.01-0.09% of individually added Cu or 0.01-0.09% of compositely added Cu and 0.01-0.20 of compositely added V, and the balance of at least 98% of zirconium including impurities. The zirconium-based alloy used in nuclear high-temperature environment of the nuclear reactor provided by the invention has excellent corrosion resistant performance; and compared with ZIRLO alloy of the prior art, the alloy has more excellent corrosion resistant performance in high-temperature pure water and high-temperature lithium-containing water, and is suitable for corrosion-resistant zirconium alloys of fuel rod cladding materials, grillwork stripes and structural parts under relatively high fuel consumption of the nuclear reactor.

The invention discloses an anticorrosion processing method used for surface of a metal member, which is used for anticorrosion processing of surface of a photovoltaic flat rack. The anticorrosion processing method comprises the steps of cleaning, drying, galvanizing and cooling in order, and the cleaning step comprises the steps of degreasing, examining, pickling and washing in order, the drying and galvanizing steps also comprise an assistant leaching step, the assistant leaching step is characterized in that the photovoltaic flat rack is immersed into a plating auxiliary for 5-8 minutes, the temperature of the plating auxiliary is between 50-57 DEG C, the plating auxiliary contains zinc chloride and ammonium chloride, the mass ratio of zinc chloride to ammonium chloride is between 1 and 4 to 1 and 10, and the plating auxiliary also contains glycerin. According to the invention, the technology route is simple, and the method is benefit for obtaining smoother galvanizing layer surface layer and more uniform galvanizing layer composition.