19515results about "Metallic material coating processes" patented technology

PCT No. PCT / JP95 / 02034 Sec. 371 Date May 23, 1997 Sec. 102(e) Date May 23, 1997 PCT Filed Oct. 4, 1995 PCT Pub. No. WO96 / 10710 PCT Pub. Date Apr. 11, 1996An object of the present invention is to provide galling resistance to a threaded joint used for an oil well pipe. On a thread portion and a metallic sealing portion of the joint, there is provided a manganese phosphate chemical formation coating layer, or alternatively there are provided a nitriding layer of 1 to 20 mu m thickness and a manganese phosphate chemical formation coating layer of 5 to 30 mu m thickness, and also there is coated a solid lubricant which contains powder of molybdenum disulfide or tungsten disulfide and also contains one of epoxy resin, furan resin and polyamide resin as an essential component, and a ratio of composition is maintained at a specific value, so that a solid lubricant coating layer of 10 to 45 mu m thickness can be formed by heating. Due to the above surface treatment, even when the frequency of repetition of fastening and unfastening of the joint is increased, the occurrence of galling can be prevented over a long period of time.

The invention relates to a passivating solution which is aqueous solution containing water-soluble molybdic compound, boric acid, water-soluble organic matter and silica sol, wherein the water-soluble organic matter is a mixture of alcohol and organic carboxylic acid. The invention also provides a surface treatment method for a galvanized material, which comprises the following step: enabling the passivating solution to be in contact with a galvanized material. A galvanized layer can be passivated by the contact between the passivating solution and the galvanized material so as to enable the galvanized material to have excellent corrosion resistance. In addition, the paint composition is chromium free and meets the requirements of a RoHS instruction.

An additive manufacturing process (110) wherein a powder (116) including a superalloy material and flux is selectively melted in layers with a laser beam (124) to form a superalloy component (126). The flux performs a cleaning function to react with contaminants to float them to the surface of the melt to form a slag. The flux also provides a shielding function, thereby eliminating the need for an inert cover gas. The powder may be a mixture of alloy and flux particles, or it may be formed of composite alloy / flux particles.

A nanodiamond tool, including a mass of sintered nanodiamond particles can be produced having improved mechanical, thermal, and electrical properties. The sintered mass can contain greater than about 95% by volume nanodiamond and greater than about 98% by volume carbon. Such nanodiamond tools can be formed by assembling a mass of nanodiamond particles and sintering the mass of nanodiamond particles to form a sintered mass. Prior to sintering, the mass of nanodiamond particles can be substantially free of non-carbon materials such as metal binders, sintering aids or the like. Upon sintering, the nanodiamond particles sinter together at high pressures and lower temperatures than those typically required in producing polycrystalline diamond compacts with diamond crystals of a larger size. The absence of non-carbon materials improves the high temperature performance and reliability of the nanodiamond tools of the present invention.

A material system (60) contains close packed hollow shapes (50, 70) having a dense wall structure (52, 66), which are bonded together and which may contain a matrix binder material (56) between the shapes, where the system has a stable porosity, and is abradable and thermally stable at temperatures up to possibly 1700° C., where such systems are useful in turbine apparatus.

The invention discloses an environment-friendly nano water-based silane treatment agent capable of improving anti-corrosion performance of metal surface. The treatment agent is water-based silane solution which consists of at least one alkoxy silane containing epoxy or at least one alkoxy silane containing amino, at least one disilyl silane, nano-silicon dioxide, rare earth salt type corrosion inhibitor or rare earth salt type and rare earth nano oxide, water, or acetic acid and a small amount of ethanol. The metal material is coated by using the silane solution for impregnation, brushing, spraying or spin-coating, a siloxane layer is formed on the metal surface, then the long-acting corrosion resistance is formed by curing for 3 hours at the temperature of 100 DEG C, and a nano organic silane film which has close bonding force with a coating is formed. Nanoparticles can not only improve the corrosion resistance and enhance the mechanical strength of the silane film in a coating layer, but also realize the synergistic corrosion resistance with the corrosion inhibitor. The technology has the advantages of simple process, greenness, environmental protection and strong practicality.

A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components or acetabular cups. The method, in one embodiment thereof, comprises providing a structured porous layer; providing a dense metal substrate; providing a binding mixture; applying the binding mixture to the exterior of the substrate; placing the porous layer against the substrate such that the binding mixture is disposed there between forming an assembly; and heat treating the assembly to metallurgically bond the porous layer to the substrate.

Orthopedic implants which include the components of zirconium or zirconium-based alloys having surfaces coated with oxidized zirconium or alternatively, other orthopedic implants comprising abrasion resistant surfaces contacting surfaces of cross-linked polyethylene are disclosed. Such implants provide low friction, highly wear resistant coatings especially useful in artificial joints, such as hip joints, knee joints, elbows, etc., but also useful in other implant devices as well. The implants also find use as vertebral disc prostheses.

The present invention relates to medical devices and methods for early detection of acute myocardial infarction in a patient. In particular, the invention relates to a device and method for detecting the presence of biomarker analytes in a specimen which are indicative of a potential acute myocardial infarction in the patient.

The invention discloses a corrosion-resistant magnesium aluminum alloy chromium-free passivation solution, which comprises the following components: 10-40 parts of water-base resin, 1-10 parts of nanoparticle sol, 1-10 parts of fluoric-containing acid, 1-5 parts of fluoric acid-containing salt, 1-5 parts of a rare earth catalyst, 1-10 parts of a silane coupling agent, 1-5 parts of a corrosion inhibitor, 1-2 parts of a complexing agent and 40-70% of water. The corrosion-resistant magnesium aluminum alloy chromium-free passivation solution does not contain chromium and other toxic and harmful substances, meets the ROHS environmental protection law of the European Union, and meanwhile, can form an organic and inorganic composite passivation film and a thin film on the surface of a magnesium aluminum layer, and the formed composite passivation film has an excellent physical property and corrosion resistance, and has higher corrosion resistance and long salt fog time, so that the corrosion resistance of a magnesium aluminum alloy plate is better improved.

Cutting elements having coarse grain substrates and ultra hard material layers are provided. The substrates are formed from coarse grain size particles of tungsten carbide. A method of forming such cutting elements and a drag bit incorporating such cutting elements are also provided.

The invention discloses laser-cladding high-entropy alloy powder. The laser-cladding high-entropy alloy powder comprises the following elements in percentage by weight: 10%-15% of Fe, 14%-17% of Cr, 22%-25% of Ni, 22%-24% of Co, 22%-24% of Mn, 0%-4% of Si and 0%-4% of B. The invention further discloses a scheme of adding another element Al based on the gradients of the scheme, and a method for preparing a high-entropy alloy coating by using the laser-cladding high-entropy alloy powder. According to the technical scheme, after laser cladding, good coating quality is realized; a phase structure of the coating retains peculiar solid solution structure of high-entropy alloy, and the atomic percent of each main metal element in the cladding coating satisfies nominal category of the high-entropy alloy; the coating has a plurality of excellent performances of high rigidity, high temperature resistance, wear resistance, corrosion resistance and the like; the technical repeatability and operability are both greatly improved, so that the high-entropy alloy is popularized and applied in surface modification of laser materials.

The invention refers to a method of melting-covering coating of metal surface, especially a method of gradient coating. The steps: 1, pre-smear the mixing pwoder of Fe-, Co- or Ni-group alloying powder and ceramic powder; 2, use plasm produced by ionizing non-oxidizing gas in plasm moment to scan metal surface in order to produce melting-covering layer or gradient cost. It has positive effects.

Lightweight articles comprising a polymeric material at least partially coated with a fine-grained metallic material are disclosed. The fine-grained metallic material has an average grain size of 2 nm to 5,000 nm, a thickness between 25 micron and 5 cm, and a hardness between 200 VHN and 3,000 VHN. The lightweight articles are strong and ductile and exhibit high coefficients of restitution and a high stiffness and are particularly suitable for a variety of applications including aerospace and automotive parts, sporting goods, and the like.

This invention relates to novel room-temperature process for obtaining calcium phosphate, in particular hydroxyapatite, coatings and microspheres that encapsulate drugs, proteins, genes, DNA for therapeutical use. The coatings and microspheres are designed to perform a defined biological function related to drug delivery, such as gene therapy through gene delivery. A novel method for encapsulation, and subsequent controlled release of therapeutically active agents from such biofunctional coatings and microspheres is disclosed. Such coatings and microspheres are useful for side-effects free, long-term, targeted, controlled release and delivery of drugs, proteins, DNA, and other therapeutic agents.

A composite body for cutting tools that includes a ductile phase; a plurality of carbide particles dispersed the ductile phase; and a plurality of nanotubes integrated into the composite body is disclosed. Methods of making such composite bodies and drill bits formed of such material are also disclosed.

A lubricant composition for the plastic working of metals that does not require a phosphate undercoating, is waterborne, requires only a simple application process of immersion or spraying followed by drying, and provides an excellent lubricating performance comprises synthetic resin, water-soluble inorganic salt, and water. The weight ratio of the content of salt to that of synthetic resin is from 0.25:1 to 9: 1. This composition can also contain liquid and / or solid lubricating agent(s) and an extreme pressure additive.

The invention relates to a method producing parts using laser sintering wherein a fusible powder is exposed to a plurality of laser scans at controlled energy levels and for time periods to melt and densify the powder and in the substantial absence of particle bonding outside the fusion boundary. Strength is improved up to 100% compared to previous methods. An example includes a relatively high energy initial scan to melt the powder followed by lower energy scans controlled to densify the melt and separated in time to dissipate heat to the surrounding part cake. The rate and extent to which the powder particles are fused together can be controlled so that each successive scan can be used to fuse the particles together in discreet incremental steps. As a result, the final dimensions of the part and its density and mechanical properties can be improved compared to conventional methods and part growth avoided.

The invention relates to coating systems having one or more hydrophobic layers bonded to a substrate with a silane composition and methods of making and using the same. In an embodiment, the invention includes an article having a substrate, a base coating layer covalently bonded to the surface of the substrate and a hydrophobic polymer layer disposed on the base coating layer. In an embodiment, the invention includes a method for forming an article including applying a base layer coating solution onto a substrate to form a base layer, applying a hydrophobic polymer layer onto the base layer, and applying actinic energy to the substrate.

The invention discloses an environment-friendly metal surface treating agent and a using method thereof. The treating agent comprises fluoride, zircon salt, silane, silicon dioxide, accelerating agent, dispersing agent and stabilizing agent. A conversion coating having the advantages of being compact and even, strong in corrosion resistance and excellent in adhesive force of the coating is respectively formed on the metal surface of steel and zinc; a treatment method of the metal surface treating agent is simple and is operated at the normal temperature; the original phosphating treatment equipment can be used without any change; and strong acid and strong base are not used as the treating agent; therefore, the environment-friendly metal surface treating agent is safe in production without emission, and is the best substitute product of the phosphating treatment technique and an energy-saving type environment-friendly product.

The invention in particular relates to passivation solution without chrome which is used for galvanized sheets and a method thereof. The technical scheme thereof comprises: firstly, dissolving inorganic salt corrosion inhibitor, then, adding the inorganic salt corrosion inhibitor into a stirred tank, adding dispersant, organic acid, sealant, silicone-acrylate emulsion and water while stirring, then, using inorganic acid or alkali to regulate the pH value to be 2.0-5.0, and then stirring for 1-2 hours under the condition that the temperature is 20-30 DEG C, the content of the components of each liter is: the inorganic salt corrosion inhibitor 10-55g, additive 4-10g, the organic acid 5-20g, the sealant 5-30g, the silicone-acrylate emulsion 150-300g, and the rest is the water. The method of the invention can additionally form a layer of organic resin separate layer on the basis of forming an inorganic metal compound precipitation film, additionally, since the silicon compound is added, not only the binding force between a passivation layer and zinc coating can be increased, but also the corrosion resistance, the scrubbing resistance and the wear resistance of the passivation layer can be increased, and the coating treatment after passivation can not be affected.

A laser cladding process of the wear-resisting anticorrosive coating of a hydraulic pressure support pillar cylinder barrel or a piston rod cylinder barrel comprises procedures as follows: the surfaces of the standing pillar cylinder barrel and the piston rod cylinder barrel are pretreated; the surfaces of the standing pillar cylinder barrel and the piston rod cylinder barrel are decreased, de-rusted and cleaned up by alcohol under room temperature; alloying powder is chosen and an automatic powder feeder is adjusted; the iron base alloying powder with good wear-resisting anticorrosive property and sound metallurgy compatibility with a matrix is selected and the iron base alloying powder contains major constituents, including Fe, C, Cr, Ni, Mo, Si, N, Nb, Ta and B; and at last, the automatic powder feeder is adjusted. Adjusting the automatic powder feeder can lead the alloying powder from an automatic feeding end to a laser melting pool and feeding amount is adjusted so that the thickness of the alloying coating reaches 0.6mm to1.2mm. The alloying coating of the invention is even and dense and has good wear-resisting anticorrosive property. Compared with galvanization, the wear-resisting anticorrosive property and the service life of the standing pillar cylinder barrel and the piston rod manufactured by the invention are greatly improved.

A polycrystalline diamond abrasive cutting element consists generally of a layer of high grade polycrystalline diamond bonded to a cemented carbide substrate. The polycrystalline diamond layer has a working surface and an outer peripheral surface and is characterized by having an annular region or a portion thereof adjacent the peripheral surface that is lean in catalysing material. A region adjacent the working surface is also lean in catalysing material such that in use, as a wear scar develops, both the leading edge and the trailing edge thereof are located in a region lean in catalysing material.

The invention is a medical implantable device which is coated by the method according to the invention. The surface of the substrate used for the implantable device, in the raw condition, following a cleaning regime and physiochemical pretreatments, is coated using a biomimetic process in a supersaturated calcium phosphate solution (SCPS) to obtain the desired coating coverage and morphology maintaining a ratio of calcium to phosphorus pH, as well as solution temperature plays a major role in yielding precipitation of the proper phase of CaP so that composition, morphologies, crystal structures, and solubility characteristics are optimal for the deposition process. The biomimetic coating adds the attribute of osteoconductivity to the implant device. To maximize bone growth, the implant must also induce bone growth, or possess the attribute of osteoinductivity. This attribute is acquired by the use of therapeutic agents, i.e. bone morphogenic proteins (BMP), growth factors, stem cells, etc. The preparation of the SCPS solution is slightly altered so that during the immersion of the implant in the SCPS, the therapeutic agents are co-precipitated and bonded with the CaP directly on the underlying surface of the implant device. A final dipping process into a BMP solution provides an initial burst of cellular activity. For delivering stem and / or progenitor cell, after drying the dipped solution of BMP, the cells are cultured on the surface of the implant.

There are provided a silicon-film-forming composition containing silicon particles and a dispersion medium and a method for forming a silicon film by forming a coating film of the silicon-film-forming composition on a substrate and subjecting the coating film to instantaneous fusion, a heat treatment or a light treatment. According to the composition and the method, a polysilicon film with a desired thickness which may be used as a silicon film for a solar battery can be formed efficiently and easily.

The invention provides a method for modifying a composite surface based on laser cladding and combining laser shock peening, and a device thereof. The method provided by the invention is characterized in that a coaxial and powder feeding type fast axial flow CO2 laser cladding unit clads a layer of coating on the surface of a substrate; then a neophane glass impulse laser shock peening unit is used for the shock peening on the surface of the cladded coating; a measurement feedback system is utilized to detect the surface roughness and the distribution state of residual stress of the cladded coating; the precise control over the surface roughness and the residual stress of the coating is realized by a central control and processing system so as to obtain a high quality surface-cladded coating with good performance. The device comprises the coaxial and powder feeding type laser cladding unit, the laser shock peening unit, a digital control working system, the measurement feedback system and the central control and processing system, and is under integrated control by a computer. The method and the device of the invention can reduce residual tensile stress and improve the quality of the cladded coating and prolong the service life thereof.

A method for depositing superalloy materials. A layer of powder (14) disposed over a superalloy substrate (12) is heated with an energy beam (16) to form a layer of superalloy cladding (10) and a layer of slag (18). The layer of powder includes flux material and alloy material, formed either as separate powders or as a hybrid particle powder. A layer of powdered flux material (22) may be placed over a layer of powdered metal (20), or the flux and metal powders may be mixed together (36). An extrudable filler material (44) such as nickel, nickel-chromium or nickel-chromium-cobalt wire or strip may be added to the melt pool to combine with the melted powder to give the superalloy cladding the composition of a desired superalloy material.