52results about How to "Improve oxidation and corrosion resistance" patented technology

The invention relates to a metal zipper, surface processing equipment and surface processing method thereof. The metal zipper surface processing equipment is used for surface processing zipper tooth of the metal zipper belt, which comprises a machine body, a transporting mechanism and a traction mechanism. The transporting mechanism and the traction mechanism are disposed on the machine body, which are used for transporting and tracting the metal zipper belt. A milling mechanism disposed on the machine body between the transporting mechanism and the traction mechanism is further included, which comprises a motor, a milling wheel, and a clip. The clip abuts the zipper tooth of the metal zipper belt against the milling wheel. The motor drives the milling wheel to rotate for milling the zipper tooth on the metal zipper belt. The metal zipper surface processing equipment is capable of effectively controlling milling depth of the milling, eliminating deep mark on the zipper tooth surface, and making the metal zipper tooth surface smooth and bright.

A lead-free Sn-Ag-Cu-Cr-X solder is proportionally prepared from Cu, Cr, alloy of one or more of Ga, Bi, In, Ni, Ge, La, Ce, Sb, Mn and Zn, Ag, P and/or Al and Sn through smelting in vacuum or protecting atmosphere to preparing intermediate alloys Sn-Cu, Sn-Cr, Sn-Ag, Sn-P and Sn-Al, and proportional smelting.

The invention discloses a wear-resistant and corrosion-resistant surfacing material. The wear-resistant and corrosion-resistant surfacing material for a flux-cored wire comprises a steel strip and powder; the wear-resistant and corrosion-resistant surfacing material for a welding electrode comprises a core wire and the powder; the powder is prepared from the following components by weight: 4-8 parts of marble, 0-15 parts of feldspar, 4-14 parts of rutile, 0-4 parts of titanium dioxide, 0-10 parts of fluorite, 0.5-5 parts of mid-carbon ferromanganese, 3-6 parts of atomized ferrosilicon, 42-55 parts of chromium metal, 7-12 parts of molybdenum powder, 12-18 parts of nickel powder, 5.5-8 parts of ferroniobium, 0-8 parts of iron powder, 1-2.5 parts of ferrotitanium, and 0.5-2 parts of rare earth; the thickness of the steel strip is 0.3-0.61 mm; the filling amount of the powder is 28-35 percent of the total amount; the core wire is made from any one of H08A, H0Cr24Ni13 and 0Cr18Ni9Ti; the weight part ratio of the core wire to the powder is (40-65) to (35-60).

The invention provides a composite permanent-magnetic material of a motor and a preparation method of the composite permanent-magnetic material. The composite permanent-magnetic material of the motor is formed by a system of Eu, Gd, Fe, Al, P and M, wherein the M is formed by mixing nanoparticles of Fe2O3, Fe3O4, TiC and SiN; the mass ratio of Eu to Gd to Fe to Al to P to M in the system is (5-7) to (5-7) to (60-70) to (2-3) to (1-2) to (5-7); and the mass ratio of the Fe2O3 to the Fe3O4 to the TiC to the SiN in the M is 10 to 5 to 2 to 1. Therefore, the residual magnetism and the magnetic energy product are kept while the coercive force and the high-temperature stability of the permanent-magnetic material are improved, and the cost is effectively reduced.

The invention discloses a surface shot blasting process for improving a high temperature steam oxidization resistance of a high-chromium austenite steel, wherein mechanical centrifugal shot blasting equipment is used for shot blasting; the shot is made of ceramic; microhardness of the shot is 660-750HV, shot diameter is 0.25-0.75mm, a distance from a nozzle to the surface of a test sample is 150-190mm, shot blasting flow is 1.0-2.5kg/min, shot blasting duration is 2-4min and shot blasting angle theta is 40-65 degrees. According to the process disclosed by the invention, a shot blasting strength of 0.25-0.35A and a surface coverage of 200% of the high-chromium austenite steel can be guaranteed; and meanwhile, the oxidizing corrosion resistance of the high-chromium austenite steel in the high-temperature steam is effectively improved, so that the development of high-temperature steam oxidizing protection methods of supercritical and ultra supercritical units is greatly promoted.

The invention discloses an anti-oxidative refractory brick and a preparation method thereof. The anti-oxidative refractory brick is prepared from raw materials in parts by weight as follows: 12-19 parts of quartzite, 10-15 parts of topaz, 11-17 parts of coal water slurry slag, 5-10 parts of silicon oxynitride, 18-27 parts of dolomite, 7-13 parts of zirconium diboride, 8-16 parts of forsterite, 9-18 parts of dolomite, 22-29 parts of marine dredged sludge, 16-24 parts of anthracite, 14-22 parts of granite stones, 15-20 parts of kaolin, 10-15 parts of porous powder quartz, 5-10 parts of pyrophyllite and 13-19 parts of industrial aluminum oxide. The effects of promoting sintering and improving the oxidation resistance and the corrosion resistance of the refractory brick are realized by introducing silicon oxynitride and zirconium diboride; the added raw materials such as porous powder quartz, coal water slurry slag and the like can improve the heat stability, the corrosion resistance and the wear resistance of the refractory brick. The refractory brick has excellent properties of excellent oxidation resistance, thermal shock resistance, corrosion resistance, wear resistance, high high-temperature strength, low expansion coefficients and the like.

The invention discloses a light automobile steering gear aluminum alloy material replacing a QT400. The light automobile steering gear aluminum alloy material replacing the QT400 is characterized in that main components comprise, by weight percentage, 0.08%-0.25% of titanium Ti, smaller than or equal to 2% of manganese Mn, 0.05%-0.5% of cadmium Cd, 4.2%-8.0% of copper Cu, 1%x10<-4>-2.0% of Lewis acid-base pairs and the balance aluminum, wherein Cu>=0.8Mn+4.05%, and the alloy mean grain size is smaller than 120 microns.

The invention relates to high-Cr-content cast heading machine cutter steel. The cutter steel comprises the chemical components of, by weight, 0.30%-0.55% of C, 8.0%-12.0% of Cr, 1.2%-3.0% of Mo, 0.5%-1.8% of Ni, 0.6%-1.0% of V, 0.1%-0.4% of Mn, 0.6%-0.8% of Si, 0.04%-0.30% of N, no more than 0.005% of S, no more than 0.03% of P and the balance Fe. The cutter steel manufacturing technique comprisesthe following steps that a near-net shape blank of a cutter is obtained through precise casting, then heat treatment is conducted, and a finished product is obtained directly after fine machining. Yield strength and tensile strength are improved while the hardness, impact toughness and elongation of the cutter steel all can reach the level of domestic forged heading machine cutter steel; the oxidation corrosion resistant capability, thermal fatigue resistant performance and abrasive grain abrasion resistance are improved; and the production period is shortened, and the production cost is reduced.

The invention discloses an alloy bonding wire of gold, silver and palladium. The alloy bonding wire comprises gold element, silver element, palladium element and impurities, wherein the mass percentage of the gold element is 1% to 5%; the mass percentage of the palladium element is 1% to 15%; the mass percentage of the silver element is 80% or greater than 80%; and the balance is the impurities. A preparation method of the bonding wire comprises the following steps: step one, weighing raw materials; step two, preparing alloy; step three, casting; step four, wire drawing; step five, cleaning; step six, annealing; and step seven, compound winding. Silver and palladium are pre-alloyed, gold and pure silver are cast into a rod material, and then wire drawing, annealing, cleaning and compound winding are carried out to complete product preparation; in the preparation process, various technological parameters are reasonably used, the processing performance of the silver-based alloy bonding wire is improved, and the oxidation resistance and corrosion resistance are greatly improved; and moreover, the bonding wire disclosed by the invention is extremely good and stable in using performance, and can meet the requirement on the performance quality of the bonding wire in the field of semiconductor high-end packaging.

The invention discloses a method for growing graphene on a structured copper base, a cable core material and a preparation method of the cable core material. The method for growing the graphene on the structured copper base comprises the following steps of S1, alternately stacking copper powder and copper foil into a mold, and carrying out isostatic pressing treatment molding to form an ingot; and S2, growing the graphene on the ingot through a chemical vapor deposition method to form the copper-based graphene. The formed copper-based graphene is subjected to re-pressing, sintering and hot sintering wire drawing forming in sequence, and the cable core material is prepared; and the prepared cable core material comprises a copper material and the graphene, wherein the copper material comprises the copper foil and the copper powder, and the copper foil and the copper powder are coated with the graphene. The copper powder and the copper foil are alternately stacked to carry out structural treatment on the copper base, so that the service life of a copper-based graphene material is prolonged, and the performance of the copper-based graphene material is improved; and the cable core material formed by further processing generates obvious anisotropy, and the phenomena of non-uniform current distribution and equivalent resistance increase caused by alternating current in the use of the cable core material are improved.

The invention is applicable to the technical field of anticorrosive coatings, and provides a nano titanium-doped modified graphene high-performance anticorrosive coating which comprises the followingraw materials in parts by weight: 35-50 parts of nano titanium dioxide, 25-35 parts of modified graphene, 200-300 parts of epoxy resin, 1-5 parts of a cosolvent, 1-5 parts of a coupling agent, 2-5 parts of a curing agent and 30-50 parts of water. The invention also provides a preparation method of the nano titanium-doped modified graphene high-performance anticorrosive coating, graphene is modified, excellent chemical stability, strong adhesive force and film-forming property of graphene are considered, and meanwhile, the hydrophobicity of graphene is reduced, so that graphene is uniformly dispersed in the anticorrosive coating, and a protection effect of layer-by-layer overlapping is realized; the nano titanium dioxide is doped with the curing agent to form a coating layer firmly bonded with the substrate, thereby enhancing the compactness and integrity of the anticorrosive coating and greatly enhancing the oxidation corrosion resistance of the anticorrosive coating.

The invention discloses a seamless steel pipe for a high-pressure boiler. The seamless steel pipe comprises a steel pipe main body, a first endurance strength protection layer, a second endurance strength protection layer, a first oxidation corrosion resisting layer, a second oxidation corrosion resisting layer, a first tissue stable layer and a second tissue stable layer, wherein the first tissue stable layer, the first endurance strength protection layer, the first oxidation corrosion resisting layer and the second oxidation corrosion resisting layer are arranged on the inner wall of the steel pipe main body in sequence; the second tissue stable layer and the second endurance strength protection layer are arranged on the outer wall of the steel pipe main body in sequence. Through adopting the method, the seamless steel pipe is high in endurance strength, high in oxidation corrosion resistant property and good in tissue stability, and can be used under high-temperature and high-pressure conditions in long-term.

The invention relates to the technical field of shielding welding wire, in particular to a shielding welding wire and a production method thereof. The mass percentages of chemical components of raw materials of the shielding welding wire are 0.01 to 0.04 percent of carbon, 1.2 to 1 percents of silicon, 1.1 to 2.1 percents of manganese, 1.0 to 2.1 percents of titanium, 0.009 to 0.013 percent of sulfur, 0.23 to 0.31 percent of aluminum, no more than 0.013 percent of phosphorus, 0.003 to 0.01 percent of boron, 0.0005 to 0.001 percent of vanadium, and the remains are iron ad unnecessary impurities. Through reasonable element match design, the prepared welding wire is high in splitting strength, the splitting strength reaches 540 MPa, the shock-resistance work of the welding wire reaches 606190 KV 2 J under the environment of 40 DEG C below zero, and the spatter lose rate in the welding process is reduced to below 2 percents.

The invention provides preparation methods of a corrosion-resisting aluminum honeycomb core and an aluminum honeycomb plate. In a process of preparing the aluminum honeycomb core, a through hole and athrough groove are formed, so that when a honeycomb core is welded with an aluminum plate, residual air in the honeycomb core can be sufficiently discharged, and a condition that an aluminum foil ofthe aluminum core in a high-temperature welding process is oxidized is avoided; meanwhile, an exposed surface of the aluminum foil is coated with a corrosion-resisting layer, so that the oxidization-resisting and corrosion-resisting capability of the aluminum foil is improved, the weather resistance of the aluminum honeycomb core is improved and the service life of the aluminum honeycomb core is prolonged.

The invention relates to the technical field of electroplating, in particular to a corrosion resistant coating of a silver combined coating. The corrosion resistant coating comprises a base coating, afirst silver coating, a first gold coating and a rhodium ruthenium coating which are sequentially electroplated on the surface of a base material, the base coating is used for adjusting the surface flatness of the base material, the first silver coating is used for improving the conductivity of the base material, the first gold coating is used for improving the adhesion of the adjacent coating, and the rhodium ruthenium coating is used for improving the corrosion resistance and wear resistance of the base material. The coating structure prepared from the coating has good wear resistance, oxidation resistance, conductivity and corrosion resistance, and the adhesiveness between the electroplating coating and the base material is good.

The invention provides a material for casting an exhaust manifold. The material for casting the exhaust manifold is composed of the following chemical ingredients of, in percentage by mass, 0.2-0.6% of C, 1.2-2.6% of Si, 0.1-0.5% of Al, 0.1-0.3% of Mn, 20-24% of Cr, 22-26% of Ni, 0.6-0.8% of Mo, 0.7-1.1% of Ba, 4-7% of Ce, 0.9-1.6% of N, 1.5-1.9% of Nb, 0.02-0.05% of P, 0.11-0.16% of S, 5-7% of Ti, 6-8% of V and the balance ferrum. The material for casting the exhaust manifold has the beneficial effects that (1), an appropriate amount of alloying elements of chromium, nickel, molybdenum, nitrogen, aluminum and silicon and the like are added in the exhaust manifold material, and the abrasive resistance and oxidation corrosion resistance of final exhaust manifold products are improved and enhanced to a certain extent; (2), automobile exhaust manifolds fabricated by the material for casting the exhaust manifold have higher temperature bearing capacity and durability, the quality of products is improved, the service life of products is prolonged, and to some extent, the cost is also saved.

The invention relates to the technical field of electroplating, in particular to a corrosion-resistant coating for an interface of an electronic device. The corrosion-resistant coating comprises a substrate plating layer plated on a surface of a substrate, the substrate plating layer is a nickel-plated tungsten layer for improving corrosion resistance of the substrate, the surface of the nickel-plated tungsten layer is plated with a pre-plating layer for improving the adhesion of adjacent plating layers, a first silver plating layer for improving corrosion resistance and the electrical conductivity of the substrate, and a second gold plating layer for improving adhesion of adjacent plating layers. a third rhodium layer for improving corrosion resistance and wear resistance of the substrateand a fourth gold plating layer for improving the solderability of the substrate. The coating structure combined by the above plating layers has the better wear resistance, oxidation resistance, electrical conductivity and corrosion, and the adhesion between the plating layer and the substrate material is good, and the welding property of the substrate is also improved.

The invention discloses low-temperature composite calcium sulfonate-based lubricating grease and a preparation method thereof, and belongs to the technical field of lubricating grease, wherein the low-temperature composite calcium sulfonate-based lubricating grease comprises the following raw materials in parts by weight: 35-40 parts of low-temperature base oil, 1.1-1.5 parts of a converting agent, 3.5-5.5 parts of a composite thickening agent, 25-30 parts of ultrahigh-base-number synthetic calcium sulfonate, 3.5-5.5 parts of monoalkyl titanate, 1.5-2.5 parts of micro-nano borate, 1.5-2.0 parts of glacial acetic acid, 1.2-1.8 parts of cyclohexylamine, 0.5-1.5 parts of a high-temperature antioxidant, 1.0-2.0 parts of an oxidation and corrosion-resistant additive and 0.1-3.5 parts of a surfactant. By blending the low-temperature base oil, the low-temperature resistance of the lubricating grease can be improved from the raw materials, and by adding the oxidation and corrosion-resistant additive, the oxidation resistance and the corrosion resistance of the lubricating grease can be improved, so that the service life of the lubricating grease is prolonged, and the lubricating grease issuitable for popularization and application.

The invention discloses a protective film for corrosion resistance of metal niobium at a high temperature and a preparation method of the protective film. The preparation method comprises the following steps of sequentially carrying out vacuum melting, rolling and annealing treatment on a niobium bar, and then cutting the niobium bar into an experimental sample; melting a lead-bismuth alloy to obtain liquid lead bismuth; putting the treated experimental sample into the liquid lead bismuth, fixing the sample, and carrying out interface reaction and diffusion reaction on Nb in the experimental sample and oxygen dissolved in the liquid lead bismuth to generate a layer of NbO surface film at first; the NbO surface film further reacts with oxygen dissolved in the liquid lead bismuth to generate a layer of NbO2 protective film; and the experimental sample is taken out and placed on a stainless steel sheet, and metal niobium with the protective film is obtained after the experimental sample is cooled. The protective film lays a foundation for expanding the application of the refractory metal in the industry.

The invention discloses a tailoring device for producing and processing sail cloth. The tailoring device comprises a support, a transverse column and a tailoring table, wherein the upper part of the support is fixedly connected to the transverse column; the tailoring table is located on one side of the support; a chute is formed in the inner wall of the transverse column; an electric telescopic rod is connected in the chute; a pulley is arranged at one end of the electric telescopic rod; the bottom of the pulley is fixedly connected to a connecting column; an air pressure rod is arranged on one side of the outer side of the connecting column; one end of the air pressure rod is connected to a bearing; and one end of the bearing is movably connected to the chute. By arranging the electric telescopic rod and the bearing, the sail cloth is tailored effectively and conveniently, and people operate a tailoring blade flexibly and conveniently. By arranging a hydraulic column and a shock absorbing spring, the tailoring table is conveniently lifted and lowered effectively. Meanwhile, the tailoring device has a function of reducing shock. By arranging a beryllium bronze layer and an antioxidant layer, the hardness of the tailoring blade is enhanced effectively, and the resistance to oxidation of the tailoring blade is enhanced effectively.

The invention discloses a Cr-Me multilayer film based on Zr as a substrate and a preparation method thereof and belongs to the field of plating of physical vapor deposition. By taking a Zr-4 alloy (prepared from 1.20-1.70% of Sn, 0.18-0.24% of Fe, 0.07-0.13% of Cr and 0.03-0.08% of Ni) as the substrate, the Cr-Me multilayer film is coated to the surface of Zr by means of a magnetron sputtering method. The modulation ratio of the Cr-Me multilayer film (Zr, Al, Mg and Nb) is 1: (0.1-10). The total number of layers of the Cr-Me multilayer film based on Zr as the substrate is 2-100 and the thickness is 0.5-50 [mu]m. The plated Cr-Me multilayer film can improve high-temperature water vapor corrosion resistance and oxidizing performance of a zirconium alloy tubular product, so that the service life of a zirconium alloy pressure pipe is prolonged, the nuclear leakage accident is reduced, and the economical benefit and the safety guarantee of nuclear industry are further improved.

The invention relates to the field of construction engineering, in particular to an anchor rod corrosion prevention method. The method comprises the steps that the parts inside a base and outside the base of an anchor rod are both subjected to corrosion prevention processing; according to the steps for corrosion prevention processing of the part inside the base of the anchor rod, flexible corrosion prevention surface treatment is conducted, a flexible corrosion prevention coating is covered with a waterproof material, and a rubber layer is wound and fixed outside the waterproof material; according to the steps for corrosion prevention processing of the part outside the base of the anchor rod, flexible corrosion prevention surface treatment is conducted, and the anchor rod is sleeved with a protection cap. According to the anchor rod corrosion prevention method, the two parts inside and outside the base of the anchor rod are subjected to different corrosion prevention processing, the outer part exposed out of the base and the inner part extending into the base are subjected to different corrosion prevention processing, particularly, the part inside the base is subjected to flexible corrosion prevention, the phenomenon that a corrosion prevention layer on the surface of the anchor rod is damaged when the anchor rod is deformed due to stress is avoided, the corrosion prevention capacity is improved, and the service life of the anchor rod is prolonged.

The invention relates to a boiler water high-utilization-rate method, which comprises the following steps of: putting a collection basin into the bottom of a high-temperature furnace, adding 3 per thousand to 8 per thousand of anhydrous trisodium phosphate into a high-temperature furnace, heating the high-temperature furnace to 400-500DEG C for processing, taking out the collection basin, cooling and icing collected precipitates, and putting the collection basin back to the bottom of the high-temperature furnace; adding a new material into the high-temperature furnace in proportion, raising the temperature to melt the cooled mixed precipitate, and then reducing the temperature and testing the furnace to produce glass; and raising the temperature in the high-temperature furnace to 450DEG C for processing for 24h. The method further involves a precipitation basket, the collection basin is pushed into the precipitation basket, and then the precipitation basket is placed at the bottom of the high-temperature furnace; the collection basin and the precipitation basket are made of nickel-based alloy; according to the boiler water high-utilization-rate method, a large amount of time and cost are saved, and the production efficiency is remarkably improved.

The invention relates to a process method for reducing titanium alloy diffusion bonding temperature through electro-deposition of a Ni-Co nanocrystalline layer, belongs to the technical field of titanium alloy low-temperature diffusion bonding, and aims to solve the technical problems that in the prior art, when titanium alloy is subjected to diffusion bonding, due to long-time heating, heat preservation and cooling, the diffusion bonding temperature of the titanium alloy is reduced; the titanium alloy low-temperature diffusion bonding process based on the titanium alloy surface nanocrystallization solves the problems that a plate subjected to diffusion bonding often has certain loss in the aspect of mechanical property compared with an original plate, and high energy consumption and long production period are also caused by the high diffusion bonding temperature, and the titanium alloy low-temperature diffusion bonding process based on the titanium alloy surface nanocrystallization is provided. Nanocrystallization of the surface of the titanium alloy is achieved through electro-deposition of a nanocrystalline coating, so that the oxidation corrosion resistance of an atomic diffusion channel and the alloy surface in the diffusion bonding process of the titanium alloy is improved, and diffusion bonding is conducted at the low temperature and the low vacuum degree to obtain the diffusion bonding joint strength meeting the use requirement. And an effective reference is provided for diffusion bonding of large-size parts under low-temperature and low-vacuum conditions.