459results about How to "Increased microhardness" patented technology

The invention relates to a high-strength aluminate silicate glass and a chemical toughening method thereof, and belongs to the silicate glass field. The glass comprises the following chemical components (weight percent): 55 to 65 weight percent of SiO2, 0.1 to 3 weight percent of B2O3, 6 to 24 weight percent of Al2O3, 3 to 9 weight percent of MgO plus CaO plus BaO plus SrO, 0 to 1 weight percent of ZrO2, 0 to 2 weight percent of ZnO, 0.1 to 0.5 weight percent of Cl2, 0.1 to 1.0 weight percent of Sb2O3, 0.1 to 0.5 weight percent of SO3 and 0.1 to 0.5 weight percent of F2, and belongs to a aluminate silicate glass system. The high-strength aluminate silicate glass is prepared through a known plate glass production method, and then is subjected to the strengthening treatment by adopting the chemical toughening method. The glass has high permeability of visible light, and relatively common soda lime glass, neutral medicine glass and alkali-free high-aluminum glass have good shock resistance property, high scratch resistance property and high durability. The high-strength aluminate silicate glass is applied to the screen surface protection of plasma display products and liquid crystal display products, the protection of touch screens, the screen protection of automated teller machines, and the screen protection of other electronic products (Mobile phones, PDAs and media machines, etc.), thereby effectively preventing the impact and the scratch damage to the glass surface of display products. The high-strength aluminate silicate glass contains no harmful elements.

The present invention is nanometer multilayer metal carbide / diamond-like film material and its preparation process. The nanometer multilayer film material includes one base material layer, one transition layer and one nanometer multilayer film layer arranged successively. The transition layer consists of one metal layer, one metal nitride layer and one metal carbonitride layer; and the nanometer multilayer film layer consists of metal carbide layers and diamond-like film layers arranged alternately. The preparation process includes: bombarding with Ti, Cr, and Zr or W targets successively to clean the base material; depositing one metal layer, one metal nitride layer and one metal carbonitride layer successively; and depositing metal carbide layers and diamond-like film layers alternately. The nanometer multilayer film material has high micro hardness, low friction coefficient and high adhesion, and may be applied in improving the surface performance of metal parts.

The invention provides a method for preparing an ultra-high hardness cladding layer through the synchronous ultrasonic vibration assisting laser technology. According to the specific scheme, the method includes the steps that ultrasonic vibration is synchronously introduced in the Ni-based metal ceramic coating cladding process, mobility of liquid metal can be improved in the mode, tissue distribution is more uniform, in the solidification process, a growing dendrite net can be broken and made to be dispersed to all portions of melt, small crystal nucleuses which are uniformly distributed are formed, segregation of metal ceramic is avoided, and therefore it is guaranteed that the cladding layer is not prone to cracking when ultra-high hardness is acquired; equipment is simple, calibration and installation are facilitated, energy consumption is low, the working environment is good, and acquired coating metal ceramic particles are uniform in distribution, high in hardness and good in abrasion resistance.

The invention discloses a method for removing microcracks from additive manufacturing nickel-base high-temperature alloy components manufactured by electron beam selective melting, and belongs to thetechnical field of high-temperature alloy and additive manufacturing. According to the method disclosed by the invention, additive manufacturing nickel-base high-temperature alloy is treated with heattreatment technologies, including hot isostatic pressing treatment, solid solution treatment and aging treatment in sequence, and compact additive manufacturing nickel-base high-temperature alloy materials without the microcracks can be prepared with the heat treatment technologies, and have excellent microstructure and mechanical properties.

The invention provides a PVD nano composite ceramic coating screw. A screw substrate (7) is coated with a coating (6) consisting of a bonding layer, a primary wear-resistance layer and a lubricating layer sequentially. The method for manufacturing the screw comprises the following steps: firstly, depositing a 50 to 100 nanometer thick transitional metal bonding layer at an air pressure of 0.1 Pa; secondly, depositing a 2 to 5 micrometer thick composite ceramic layer as the primary wear-resistance layer at a temperature of between 350 and 400 DEG C, a voltage of between -50 and -200 volts and an air pressure of 0.2 to 1Pa; and finally, depositing a 1 to 3 micrometer transitional metal doped diamond carbon film layer as the lubricating layer at a temperature of between 100 and 150 DEG C, a voltage of between -50 and -150 volts and an air pressure of 0.1 to 0.5Pa. Compared with the prior art, the screw has the advantages of having lubricating performance, along with high hardness (more than 40GPa Hv hardness) and excellent wear resistance (friction coefficient about 0.1). The method is free from pollution and the coating has strong adhesive force.

The invention is a nano-particulate demulsifying agent used in demulsification of trinary oil recovery produced fluid. The application of new technique of trinary oil recovery enhances the crude oil recovery, where the polymer injection oil-recovery technique increases the oil, obviously, but also causes the difficulty in demulsifying the produced fluid at the same time. Its character lies in that: the nano-particulate demulsifying agent is composed of particle nucleating material which processes the surface of nano silicon oxide material by silane coupler and fluorine compound and reacting solvent containing arenes as dimethylbenzene, as well as polyether demulsifying agent as multicomponent polyether, amine polyether and resin polyether. It effectively solve the problem about the demulsification of trinary oil recovery polymer injection produced fluid, field used quantity little, demulsifying speed rapid, dehydrating efficiency high and oil-water interface regular.

Together with other accessory products, includes a mixture of ion-exchange resins, cationic and anionic, charged with Ca2+, F- and PO43- ions, in an approximate molar ratio of 2:1:1, respectively. Particularly preferred is a material in which the resins also have a charge of Zn2+ ions representing a proportion of less than 1%, preferably close to 0.2% of the dry weight of the resin. The preferred resins are those whose base is cross-linked polystyrene with 2-14% divinylbenzene. The material is useful as first filler in the treatment of caries, especially deep caries, leading to remineralization of the dentin with a composition very close to the original composition, together with high microhardness. It is also useful as a component of dentifrice products such as pastes, elixirs and dental floss.

The invention discloses a method for improving plasma sprayed ceramic coatings and base binding strength, which is sprayed ceramic coating fusion processing method. The method is that sceramic coatings which are prepared by plasma spraying are put in special environment which is 300-550 DEG C for 4-8 hours and then is cooled along with a stove. The coatings and a workpiece base are mutually diffused or are formed into a new phase, thereby playing a role of a transition layer between the coatings and the base. The bonding strength of the coatings and the base are improved by about 20 percent and is capable of meeting the application requirements for industries.

The invention relates to a high-boron iron-based wear-resistant surfacing flux-cored welding wire. The welding wire is composed of a low-carbon steel sheath and a core powder. It is characterized in that the iron element in the low-carbon steel sheath and the core powder are contained in the core powder. Elements include boron, carbon, manganese, and silicon. The weight percentage of boron, carbon, manganese, and silicon in the core powder of the welding wire is: boron 6 to 12%, carbon 0.1 to 3%, manganese 0.6 to 2%, silicon 0.3~1.5%, the balance is iron. It can also include Ti0.3~3.5%, Mn 0.6~2%, Si0.3~1.5%, molybdenum 0~1%, K / Na modifier 0~1%, and aluminum-magnesium alloy 0~1.5%. The high boron iron-based wear-resistant cladding flux-cored welding wire of the present invention mainly relies on boron, titanium, carbon and other alloying elements to form boride and a small amount of carbide to achieve the wear resistance of the cladding alloy, and by adding rare earth, nickel, Aluminum-magnesium alloys, etc. improve the overall performance of cladding alloys.

The invention relates to a method for obtaining artificial graphite powder for electrical engineering, manufacturing synthetic diamonds and in other fields of technology with especially high requirements for graphite purity. The novelty of the inventive method is the use of pyrolytic carbon material obtained by methane pyrolysis at a temperature of 2100-2400° C. Pyrolytic carbon obtained as a waste product of pyrolytic anisotropic material can be used as a carbon material. The method includes grinding carbon material and its graphitizing at a temperature of 2600° C.-2700° C. The inventive method simplifies the process of preparing artificial graphite powder and enhances the degree of graphitization, which improves the quality of the final product.

The invention relates to a multi-component, multilayer hard thin film material for surface modification of a mini-type boring bit and a manufacture method thereof. The multi-component, multilayer hard thin film material sequentially comprises a base material, a metal transition layer Cr, a metal nitride transition layer CrN, a hard wear resistant layer CrTiAlCN, and a self-lubricating layer DLC. The preparation method comprises the following steps of: adopting Cr, Ti and Al metal target materials and Ar, N2, C2H2, or CH4 gas, sequentially bombarding and cleaning the mini-type boring bit, and depositing the Cr layer, the CrN layer, the CrTiAlCN layer and the DLC layer. The multi-component, multilayer hard thin film material provided by the invention has higher microhardness up to HV 2,500 to 3,500 and a film / base bonding force not less than 70N, and can be easily prepared at 100 to 200 DEG C and can be uniformly deposited on the surface of the entirety-type or solder-type hard alloy mini-type boring bit with a diameter Phi of 0.1 to 2.0 mm, thus significantly improving the service life of the mini-type boring bit as well as the quality and the production efficiency of printed circuit boards.

The invention discloses high-temperature resisting, abrasion resisting, corrosion resisting and cavitation resisting nickel-chromium-chromium carbide composite powder and a high-temperature resisting, abrasion resisting, corrosion resisting and cavitation resisting nickel-chromium-chromium carbide coating prepared through the composite powder. The composite powder comprises, by weight percentage, 65-85% of Cr3C2, 10-25% of NiCr, 1-5% of Nb and 1-5% of Ta. The coating is prepared in the manner that the composite powder is subjected to hypersonic flame spraying or high-enthalpy plasma spraying or is subjected to hypersonic flame spraying or high-enthalpy plasma spraying, and then the high-enthalpy plasma remelting technology is combined. The coating is greatly improved in the aspects of microhardness, combing strength, corrosion resistance and cavitation resistance. Meanwhile, the production cost is low, the preparing method is reliable in technology, performance is stable, and the coating is suitable for being applied to the fields such as hydraulic machine flow passage components, compressor screws and turbine blades on a large scale.

The invention discloses an impact-resistance double-roller roughing roll, comprising the following chemical compositions in percentage by weight: 0.30-0.65% of C, 0.35-1.20% of Si, 0.30-1.00% of Mn, 3.00-5.50% of Cr, 0.30-1.20% of Ni, 0.50-1.50% of Mo, 0.20-2.00% of V, less than or equal to 0.02% of S and less than or equal to 0.02% of P, and the balance of Fe and unavoidable impurities. The surface hardness of the double-roller roughing roll of the invention is 65-75HSD and the double-roller roughing roll has the characteristics of fine high temperature impact resistance property, thermal fatigability resistance and abrasive resistance.

The invention relates to a CrMoNbTiZr high-entropy alloy material and a preparation method of the CrMoNbTiZr high-entropy alloy material. The high-entropy alloy material comprises Cr, Mo, Nb, Ti and Zr, wherein the molar ratio of Cr to Mo to Nb to Ti to Zr is 1:1:1:1:1. The preparation method comprises the steps that 1, powder is prepared, and particularly metal powder is prepared according to the equal molar ratio; 2, powder mixing is carried out, and particularly the prepared powder is mixed to be uniform in a V-shaped powder mixing machine; 3, pressing and block forming are carried out, and particularly the mixed powder is subjected to cold pressing under a pressing machine to form blocks; and alloy is molten, and particularly a vacuum non-consumable arc melting furnace is used for melting the samples which are obtained after the powder is pressed to be blocks. The CrMoNbTiZr high-entropy alloy material mainly comprises a BCC solid solution phase and a small amount of Laves phase, meanwhile has the advantages of being high in hardness, high in corrosion resistance and the like, and has the good application prospect in the field of wear resistance and corrosion resistance.

The invention discloses a metal ceramic coating on surface of a copper plate of a continuous casting mold. The metal ceramic coating is a coating obtained by performing hypersonic flame spraying on cobalt coated tungsten carbide WC-12Co powder and has the thickness of 0.2 to 0.6mm. Correspondingly, the invention also provides a process for manufacturing the metal ceramic coating on the surface of the copper plate of the continuous casting mold. The process comprises the following steps of: cleaning the surface of the copper plate of the continuous casting mold; performing shot blasting treatment on the surface of the copper plate of the continuous casting mold; spraying the cobalt coated tungsten carbide WC-12Co powder on the surface of the copper plate of the continuous casting mold by employing a hypersonic flame spraying process, wherein the hypersonic flame spraying process has the parameters of the oxygen flow of 700 to 1,000L per minute, the kerosene flow of 5.0 to 6.0 gph, the spraying distance of 300 to 400mm and the coating thickness of 0.2 to 0.6mm. The metal ceramic coating is low in porosity and high in microhardness, the adhesive strength between the coating and a matrix is high, and the wear resistance and corrosion resistance of the mold are obviously improved.

The invention discloses a high-temperature-resistant and wear-resistant hard alloy with a NiAl alloying bonding phase. WC and / TiC is used as a hard phase, NiAl alloying Co and / Fe is used as a bonding phase, and the volume ratio of the hard phase to the bonding phase is equal to 10-40%. The preparation method comprises the following steps of: uniformly mixing 0.03-21.04wt% of nickel powder and aluminum powder with carbide powder based on the component proportion of Ni-50at.%Al; placing the mixture in a graphite container to spread out, heating the mixture to 660-1300 DEG C at a non-oxidative atmosphere, preserving heat, and then naturally cooling to obtain a mixture of a carbide and NiAl; grinding, crushing and screening to obtain mixed powder; carrying out deoxidation pretreatment at a hydrogen atmosphere of 400+ / -50 DEG C; carrying out wet grinding on 45.77-96.34wt% of mixed powder and the balance of Co and / Fe powder; carrying out spray-drying on the mixed material subjected to wet grinding and pressing; and sintering a compaction in a liquid phase at low pressure at the temperature of 1350-1550 DEG C to obtain the high-temperature-resistant and wear-resistant hard alloy.

The present invention is super hard composite antioxidant film in nanometer crystal-amorphous structure for cutter and its depositing process, and especially relates to super hard film in nanometer crystal-amorphous structure and composite oxide film. The composite film on cutter includes successively the adhering transition layer, super hard nanometer crystal-amorphous structure TiAlN / alpha-Si3N4 film, composite oxide film for raising antioxidant performance and self-lubricating film with low friction coefficient. The present invention provides a vacuum chamber with outer target, inner target and ion source and industrial filming process with high production efficiency, high coating quality and low production cost. The present invention is suitable for various kinds of cutters of high speed steel, hard alloy and ceramic and various kinds of molds.

The invention discloses a process for spraying a composite coating on a metal surface. The process comprises the following steps: carrying out purification treatment on the metal surface; carrying out laser burning treatment on the metal surface; carrying out explosion spray treatment on the metal surface, and preparing the composite coating; carrying out laser re-melting treatment on the composite coating prepared by an explosion spray process, on the metal surface. According to the combined process for spraying the composite coating on the metal surface, the explosion spray process is compounded with two laser heat treatment processes, so that the binding force of the coating and a matrix can be effectively improved, and the performances of corrosion resistance, wear corrosion and the like of the coating can be further improved.

The invention relates to a method for carrying out high velocity oxy-fuel spraying on the surface of a roller of a lithium battery pole piece rolling machine. The method of adding hydrogen into fuel and decreasing the diameter of a combustion chamber is adopted. By means of adding the hydrogen, the heat enthalpy value and the speed of the flame are increased. By means of adding of the hydrogen, tungsten carbide particles can be reduced and protected, and burning losses and decarburization are avoided. To further increase the speed of the flame, the diameter of an outlet of the combustion chamber is decreased by 2 mm-5 mm, the pressure of the combustion chamber is increased, and the speed of the flame is further increased. Due to adding of the hydrogen, burning losses and decarburization of the tungsten carbide particles can be reduced, the heat enthalpy value of the flame is increased, the tungsten carbide particles are heated more evenly, a coating can have higher tenacity and compactness, and the binding force of the coating is improved. By means of the method, the speed of the flame is increased, and the aim of increasing the particle spraying speed is achieved; and tungsten carbide particles at a higher speed impact on a base body, the binding force of the coating and the base body is improved, the inner binding force of the coating is increased by means of subsequent higher-speed particle impact, and therefore the binding force of the whole coating is increased.

The invention discloses a preparing method of a metal-graphene composite electroplating material. Graphene serves as an anode, a base body to be electroplated serves as a cathode, main salt and an additive are added into a graphene stripping agent to obtain an electrolyte, and under the conditions that the temperature ranges from 25 to 75 DEG C, the voltage ranges from 2.5 to 5 V, and the currentdensity ranges from 5 to 20 mA.cm<-2>, the anode and the anode are placed in to the electrolyte to be subjected to codeposition for three to five hours, and a metal-graphene composite coating is obtained. Agglomeration of graphene in the electrolyte and the coating material can be effectively prevented, and the prepared graphene doped metal base composite electroplating material is compact, flat and smooth in surface and free of agglomeration.

The invention relates to a method for preparing a high-hardness abrasion-resistant powder metallurgic roller sleeve, which is characterized in that the method adopts powder metallurgic technology for manufacture, and comprises the following steps: firstly, powder mixing, namely mixing iron powder, carbon powder, chromium powder or ferrochrome powder and a lubricant, and guaranteeing that the total composition comprises the following components in percentage by weight: 0.3 to 2 percent of carbon, 0.3 to 4 percent of chromium, not more than 2 percent of unavoidable impurities, and the balance being iron; secondly, forming, wherein the density after forming is more than 6.8g / cm; thirdly, sintering; fourthly, machine processing; fifthly, quenching; sixthly, cold treatment; and seventhly, tempering. Compared with the prior art, the method has the advantages that the product mainly comprises the iron, the carbon and the chromium and does not comprise noble metal element such as nickel, molybdenum and tungsten, so that the cost is low; the mechanical properties such as the tensile strength, the hardness and the microhardness of the product are superior to those of products obtained by casting technology; and both the thermal diffusivity and the thermal conductivity of the product are lower than those of the products obtained by the casting technology.

The invention provides a treatment method for alloying the surface of a superhigh-strength aluminum alloy. The treatment method comprises the following steps: firstly, manufacturing a Cu-Cr alloy cast ingot of which the Cr content is 3-20 percent by using a vacuum induction smelting method; carrying out surface removal and grinding treatment and then fixedly mounting the Cu-Cr alloy cast ingot on a target device of vacuum magnetron sputtering equipment; mounting the aluminum alloy subjected to clean surface grinding treatment on a matched clamp and mounting the aluminum alloy into a vacuum chamber of the vacuum magnetron sputtering equipment; opening the vacuum magnetron sputtering equipment; plating a Cu-Cr alloy film with the thickness of 2-10mum on the surface of an aluminum alloy substrate; and feeding the surface-plated Ni-Cr alloy film into strong-current pulse electron beam equipment for carrying out surface alloying treatment on the electron beams. According to the method disclosed by the invention, a layer of Cu-Cr alloying layer with high microhardness and favorable wear resistance and corrosion resistance is formed on the surface of the aluminum alloy. The alloyed layer and an aluminum alloy matrix are better bonded; and the surface strength of the aluminum alloy can be effectively improved and the wear resistance and corrosion resistance of the surface of the aluminum alloy are improved.

The invention discloses a process for intensifying an ultrasonic vibration assisted electric spark pulse discharging surface, comprising the following steps of: selecting 65Mn steel subjected to medium temperature tempering treatment after quenching, as a workpiece electrode and a monocrystal Si as a tool electrode; additionally arranging an ultrasonic vibration device on the tool electrode to assist the electric spark surface intensification; and with coal oil as a working solution, carrying out positive electrode electric spark surface intensification on the 65Mn steel by utilizing an electric spark processing machine tool, wherein the intensifying electricity parameters are that the pulse width is more than or equal to 4.2 mu s and less than 7.5mu s, the pulse width intrapulse ratio is between 0.21 and 0.56, a peak value current is more than or equal to 3.2A and less than 14.2A, the intensifying time is between 15min and 25min, the tool electrode-assisted ultrasonic vibration amplitude range is between 1mu m and 2mu m, and the frequency range is between 15 kHz and 60kHz. The invention improves the surface topography of an intensified layer so that the thickness distribution of the intensified layer is more uniform and more compact, increases the quantity of an intensifying phase and improves microhardness, abrasive resistance and surface Si content of the intensified layer.

The invention discloses a preparation method for a wear-resistant and corrosion-resistant composite coating layer. The preparation method specifically comprises the following steps: S1. carrying out pretreatment on a cladding matrix; S2. carrying out drying treatment on a cladding material; S3. melting the cladding material and the surface layer of the cladding matrix simultaneously through a laser device and in combination with a coaxial powder feeding method to form an alloy coating layer, that is, the high-hardness corrosion-resistant layer, wherein the cladding matrix in the step S1 is made from Q960 steel; and the cladding material in the step S2 is made from the mixture of tungsten carbide powder and Stellite 6 alloy powder. According to the preparation method disclosed by the invention, the composite coating layer is creatively prepared on the surface of the Q960 steel through a laser cladding technology; the tungsten carbide powder and the Stellite 6 alloy powder are mixed as the cladding material in a specific ratio; and the process parameters of the laser cladding technology are scientifically and reasonably designed, so that the problems of low hardness and short servicelife under the working condition of abrasive wear, of a laser cladding coating layer made from Stellite 6 cobalt alloy, are effectively solved.

The invention discloses a Ti(C, N)-based cermet. The Ti(C, N)-based cermet takes Ti(C, N), titanium carbide, tungsten carbide, TaNbC, Mo2C and Cr3C2 as hard phases, takes carbon monoxide and nickel asbinding phases and takes a Co-Rh-Os intermediate alloy as an additive, and the Ti(C, N)-based cermet material comprises, by weight percentage, 45-60% of Ti(C, N), 1-5% of titanium carbide, 12-18% oftungsten carbide, 6-12% of TaNbC, 5-12% of Mo2C, 0.3-1% of Cr3C2, 6-11% of carbon monoxide, 3-8% of nickel and 1-5% of the intermediate alloy.

The invention relates to a medium strength aluminium alloy wire with conductivity of 55% IACS, and a preparation method thereof, and belongs to the field of alloy manufacturing technology. The alloy elements comprise, by weight, 0.16%-0.22% of iron, 0.48%-0.54% of silicon, 0.62%-0.67% of magnesium, 0.01%-0.02% of boron and 0.02%-0.05% of ytterbium, with the balance being aluminium. The medium strength aluminium alloy wire with a product conductivity higher than or equal to 55% IACS and tensile strength higher than or equal to 315 MPa is obtained by processes of selecting materials, smelting liquid aluminium, adjusting liquid aluminium ingredients, carrying out purifying treatment, deslagging, standing with heat preservation, degassing, filtering with heat preservation, casting and crystallizing, rolling an aluminum rod, drawing and aging. The wire and cable produced by using the aluminium alloy can be erected continuously by a conventional construction process. In a circuit operation process, circuit loss can be reduced; construction fee can be reduced; and enormous economic benefits and social benefits can be brought about for power transmission and transformation industries.

A process for preparing diffusion-type alloy steel powder uses water-atomized pure iron powder and powdered alloy elements as raw materials, and includes mixing and diffusion steps. It can be used for high-density and high-strength powder metallurgy with the advantages of low cost and excellent performance.