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264 - Plastic and nonmetallic article shaping or treating: processes

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Class / Patent application numberDescriptionNumber of patent applications / Date published
264629000 Producing article having plural hollow channels 38
264642000 Shaping or treating of multilayered, impregnated, or composite-structured article 22
264614000 Of electrical article or electrical component (i.e., not insulator, per se) 16
264638000 Shaping by extrusion (e.g., spinning, etc.) 12
264604000 Applying hot isostatic fluid pressure to preform using surrounding liquid (e.g., molten glass, melted tin, etc.) or fluid pressure-transmitting deformable sheath (e.g., metal foil, etc.) 10
264653000 Including plural heating steps 10
264681000 Producing metal oxide containing product 8
264605000 Particular or specific manner of positioning, arranging, or conveying of plural articles or plural preforms (e.g., stacking, utilizing spacer, etc.) during sintering, vitrifying, or drying 8
264645000 Introducing material under pressure into mold (e.g., injection molding, etc.) 8
264624000 Using organometallic or organosilicon intermediate 7
264628000 Producing microporous article (e.g., filter, etc.) 7
264632000 Producing hollow article (e.g., tube, etc.) 7
264669000 Utilizing binder to add green strength to preform 6
264611000 Of magnetic (e.g., ferrite, etc.) article or component 5
20110084429COMPOUNDS AND METHODS OF FABRICATING COMPOUNDS EXHIBITING GIANT MAGNETORESISTENCE AND SPIN-POLARIZED TUNNELING - The invention relates to inorganic intermetallic compounds having a PMR effect (combined GMR/CMR effect), which are characterized in that they contain at least two elements per formula unit and have a field sensitivity of less than 10% per 0.1 T at temperatures greater than 290 K. The invention also relates to composites consisting of these compounds, to a method for the production thereof and to their use, in particular, as magnetic field sensors or in the domain of spin electronics.04-14-2011
20090302512SOFT-MAGNETIC MATERIAL AND PROCESS FOR PRODUCING ARTICLES COMPOSED OF THIS SOFT-MAGNETIC MATERIAL - The invention relates to a soft-magnetic material comprising a micro fraction composed of particles of a soft-magnetic material having a particle size in the range from 1 to 100 μm and a nano fraction composed of particles of a soft-magnetic material having a particle size in the range from 100 to 200 nm, where the proportion of the nano fraction based on the total mass of micro fraction and nano fraction is from 5 to 70% by mass and the particles of the micro fraction and the particles of the nano fraction optionally consist of the same material, and also a process for producing an article composed of the soft-magnetic material.12-10-2009
20110121498METHOD FOR PRODUCING RARE EARTH SINTERED MAGNET - The present invention relates to a method for producing a rare earth sintered magnet including the steps of: molding a mixture of magnetic powder containing a rare earth compound and oil-extended rubber containing oil and rubber to produce a molded body; removing the oil-extended rubber from the molded body; and calcining the molded body from which the oil-extended rubber is removed to produce a rare earth sintered magnet 05-26-2011
20120187612PERMANENT MAGNET AND MANUFACTURING METHOD THEREOF - There are provided a permanent magnet and a manufacturing method thereof capable of densely sintering the entirety of the magnet without making a gap between a main phase and a grain boundary phase in the sintered magnet. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR)07-26-2012
20120187611METAL POWDER COMPOSITION - A metal powder composition including: an iron or iron-based powder composition, and a lubricating combination including a substance A, a substance B, and a substance C; wherein: substance A is a polyolefin, substance B is chosen from a group of saturated and unsaturated fatty acid amides, saturated and unsaturated fatty acid bisamides, saturated fatty alcohols and fatty acid glycerols, and substance C is an amide oligomer having a molecular weight between 500 g/mol and 30 000 g/mol; and wherein the amounts of respective substances A, B and C in weight percent of the iron or iron-based powder composition are: 0.05≦A+B<0.4 wt %, C≧0.3 wt %, A+B+C≦2.0 wt %, and the relation between substances A and B is: B/A>0.5. Also, a method of producing a metal powder composition and a method for producing a green component.07-26-2012
264640000 Producing fiber containing article or fiber 5
20100001441Brick Manufacturing Process Employing Cuttings of Geological Silts and Drillings Obtained From Drilling Operations - A procedure for manufacturing bricks from geological silts and drillings obtained from drilling operations is described, which comprises the step of mixing a volume of geological cuttings obtaining through the discarded material from the drilling of a well, such a as a water well, hydrocarbon prospecting, or any other fluid prospecting well. The geological cuttings are made of sands and geological clays, and they are then mixed in adequate proportions with commercial clays, fibrous organic material and water, until reaching the necessary plasticity allowing performing the subsequent molding operation with said mixture. The molded blocks and bricks thus obtained are then subjected to a baking thermal operation, obtaining desiccated bricks and blocks with the necessary mechanical resistance properties and hardness as required by a building material.01-07-2010
20100109209METHOD FOR THE PRODUCTION OF COMPONENTS MADE OF CERAMIC-MATRIX COMPOSITE MATERIAL - A method for the production of components made of ceramic-matrix composite material, in the fields of aerospace engines and turbines and turbine systems and plants; according to the method, a preform of ceramic fibres is shaped and set in a draining mould, for example made of plaster; the fibres of the preform are impregnated with a suspension of ceramic powders, the liquid of which is drained by capillarity from the draining mould; simultaneously to draining, a suspension of ceramic powders is infiltrated between the fibres of the preform so as to fill the empty space left by the drained liquid; at the end of the steps of draining/infiltration a body is obtained with a solidified or compacted porous matrix, which is removed from the draining mould and is sintered.05-06-2010
20090295045PROCESS FOR MAKING CERAMIC INSULATION - A method is provided for producing insulation materials and insulation for high temperature applications using novel castable and powder-based ceramics. The ceramic components produced using the proposed process offers (i) a fine porosity (from nano-to micro scale); (ii) a superior strength-to-weight ratio; and (iii) flexibility in designing multilayered features offering multifunctionality which will increase the service lifetime of insulation and refractory components used in the solid oxide fuel cell, direct carbon fuel cell, furnace, metal melting, glass, chemical, paper/pulp, automobile, industrial heating, coal, and power generation industries. Further, the ceramic components made using this method may have net-shape and/or net-size advantages with minimum post machining requirements.12-03-2009
20110101575PREFORM FOR COMPOSITE MATERIAL AND PROCESS FOR PRODUCING THE SAME - A preform for a composite material which has high strength and excellent air permeability and hence is applicable to a high-speed die casting method and which is capable of forming a metal composite material having excellent mechanical properties by a high-speed die casting method. Also provided is a process for producing such a preform. Ceramic fibers or/and ceramic particles are mixed with a silica sol and calcium carbonate and sintered at a predetermined temperature to form a calcium/silicon sinter obtained from the silica sol and calcium carbonate. The calcium/silicon sinter coats the ceramic fibers or/and ceramic particles so that a preform having the fibers or/and the particles bound to each other by the calcium/silicon sinter is obtained. The preform for a composite material has high strength and excellent air permeability and is applicable to the high-speed die casting method capable of attaining high productivity.05-05-2011
20120267833METHOD OF FORMING A WOVEN FIBER STRUCTURE USING A TACKIFIER COMPOSITION - A method of forming a woven fiber structure for a molding process to produce a ceramic matrix composite, includes depositing a tackifier composition having a carrier solvent, a resin material, and an inorganic filler onto at least a portion of a woven fiber structure; drying the tackifier composition on woven fiber structure to remove at least a portion of the carrier solvent from the tackifier composition; and forming the dried woven fiber structure into a preform.10-25-2012
264621000 Utilizing sol or gel 4
20110169200SOL-GEL PROCESS FOR PRODUCING MONOLITHIC ARTICLES OF VITREOUS SILICA - The present invention relates to a sol-gel process for producing monolithic articles of vitreous silica, comprising: preparing a dispersion of silica in water at acid pH; adding to said dispersion at least one alkoxysilane in a quantity such as to obtain a silica:alkoxysilane molar ratio between 6 and 30, and a water:alkoxysilane molar ratio between 40 and 200; modifying the dispersion pH by adding ammonium hydroxide or an amine or an aminoalkyl-alkoxysilane to obtain a sol; pouring the sol thus obtained into a mould; allowing the sol to gel to hence obtain a hydrogel; drying the hydrogel to obtain a dried gel; sintering the dried gel to obtain the vitreous silica article. By implementing this process, even large-dimension vitreous silica monolithic articles can be obtained substantially free of defects, with optimal optical properties, particularly in terms of UV and/or IR radiation transmittance.07-14-2011
20090166936Sol-Gel Process for the Manufacture of Moulds for Photocatalytic Processes - A sol-gel process for the manufacture of moulds for use in photocatalysis. The process also relates to industrial pultrusion, extrusion and moulding processes in which use of moulds manufactured using the sol-gel process. The process provides for the provision of a sol which is gelled, drying of the gel with solvent extraction and then densification/sintering of the gel by heating with the formation of a transparent mould having a glassy consistency which is capable of permitting the passage of UV rays.07-02-2009
20110260377X-RAY DETECTOR FABRICATION METHODS AND APPARATUS THEREFROM - A method includes fabricating an energy detector using a sol-gel process.10-27-2011
20120013051POROUS ANODE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, AND ANODE AND LITHIUM BATTERY EMPLOYING THE SAME - Provided are a porous anode active material, a method of preparing the same, and an anode and a lithium battery employing the same. The porous anode active material includes fine particles of metallic substance capable of forming a lithium alloy; a crystalline carboneous substance; and a porous carboneous material coating and attaching to the fine particles of metallic substance and the crystalline carboneous substance, the porous anode active material having pores exhibiting a bimodal size distribution with two pore diameter peaks as measured by a Barrett-Joyner-Halenda (BJH) pore size distribution from a nitrogen adsorption. The porous anode active material has the pores having a bimodal size distribution, and thus may efficiently remove a stress occurring due to a difference of expansion between a carboneous material and a metallic active material during charging and discharging. Further, the anode electrode and the lithium battery comprising the anode active material have excellent charge/discharge characteristics.01-19-2012
264678000 With article cutting, punching or grinding 3
20090096139Surface Treatment Process for Ceramic Mechanical Seal Rings of Pumps and Ring Obtained With Said Process - The present invention relates to a surface treatment process for ceramic mechanical seal rings of pumps, of the type comprising a first cold-moulding process of the ceramic powders in a suitable die and a second sintering process of the ring, characterised in that the moulding process is performed with a punch with head provided with a plurality of punctiform micro-projections; another object of the present invention is the seal ring obtained with the said process.04-16-2009
20090218735METHOD OF SYNTHESIS OF CERAMICS - The present invention relates to producing ceramic targets, which serves as a material source for magnetron, electron-beam, ion-beam and other film applying methods in micro-, opto-, nano-electronics. The aim of the proposed invention is to reduce the doping level of ceramics by non-controllable impurities, to increase a ceramic density and to improve performance characteristics of ceramic targets. In the method for synthesizing the ceramics doped by a low-melting metal consisting in that a mixture of components is pressed and sintered; as a doping additive, the mixture of components contains a low-melting metal and the surface of the main component particles is covered and moistened prior to pressing by the doping metal layer by grinding the mixture of the components. The grinding can be carried out at a melting temperature of the low-melting metal. In a particular case, for the synthesis of zinc oxide ceramic doped with gallium, the mixture of zinc oxide powder with gallium is triturated at a gallium melting temperature. The component mixture can contain a boron compound, as a binder and a doping additive, forming boron oxide during sintering.09-03-2009
20120326361POWDER COMPRISING ZIRCONIA GRANULES - The invention relates to a granulated powder intended, in particular, for the production of ceramic sintered parts, said powder having the following chemical weight composition, based on dry matter, namely: a zirconia stabiliser selected from the group containing Y12-27-2012
264682000 Producing silicon carbide containing product 3
20090295048Composite material and method of manufacturing the same - A composite material according to the invention includes X parts by volume of boron carbide, Y parts by volume of silicon carbide, and Z parts by volume of silicon as main components, wherein 1012-03-2009
20110180977PROCESS FOR PREPARING A SILICON CARBIDE PART WITHOUT THE NEED FOR ANY SINTERING ADDITIVES - The invention relates to a process for preparation of a part comprising silicon carbide with an average nanometric grain size and a relative density of more than 97%, said process comprising: 07-28-2011
20080237942METHOD FOR MANUFACTURING POROUS SILICON CARBIDE SINTERED BODY - A method for manufacturing a porous silicon carbide sintered body that includes manufacturing a silicon carbide molded body by using a raw material composition containing at least silicon carbide powder, silicon powder, and a binder. The method further includes carrying out a degreasing treatment on the silicon carbide molded body to manufacture a silicon carbide degreased body, and carrying out a firing treatment on the silicon carbide degreased body to manufacture a porous silicon carbide sintered body. The raw material composition has about 1 to about 3% by weight of the total amount of the silicon carbide powder and the silicon powder in a content of the silicon powder. And, the firing treatment is carried out at a temperature allowing silicon carbide powder to mutually form intergranular necks through counter diffusion.10-02-2008
264610000 Simultaneously burning, vaporizing, or melting of embedded element or core to form nonrandom void 3
20090206525Method for Producing Porous Silica Ceramic Material - The present invention provides a method for producing a porous silica ceramic material, wherein the method includes a step of forming a mixture including silica particles, a binder and a plasticizer, a step of imparting porosity to a green obtained by the forming of the mixture, by extracting the plasticizer from the green, a step of impregnating the green to which the porosity has been imparted with a sintering aid, and a step of firing the green impregnated with the sintering aid.08-20-2009
20110068517SUPPORT FOR A FIRED ARTICLE - An article produced using, among other techniques, free-form fabrication having a binder matrix and particles can be supported during a temperature processing, such as burn-out of the binder matrix, with a support composition to maintain geometry and/or alleviate changes in geometry of the article. The support composition can take a variety of forms such as foams, two phase materials, plastic powders, carbon powders, etc. The support material is sacrificed during the thermal processing, such as through decomposition. Such a decomposition can occur when the support composition evolves into a carbonaceous structure. The support composition can also oxidize to a gas, melt, or vaporize, among other types of sacrificial action.03-24-2011
20110227260Cellular Ceramics Apparatus and Methods of Production - Cellular ceramic materials, for example closed cell glass ceramic materials, for use in construction of buildings comprising a clay material, carbon, and water used to form the cellular ceramic blocks, slabs and beams by expansion of the particles inside the ware. The cellular ceramic materials are produced by first mixing the clay, carbon and about 40% to about 70% water by weight of the clay in the mixture, allowing the mixture to cure, drying the cured mixture, then firing the dried mixture at a temperature and for a period of time sufficient to melt the surface of the mixture. The clay material can be, for example, surface clays, ball clays, kaolin, shale, fly ash and/or bentonite. In another embodiment a mixture of volcanic ash, carbon and water can be formed and layered with the mixture of clay, carbon and water. The cellular ceramic materials are, in most cases, impervious to liquid, are capable of supporting substantial loads in tension and compression without reinforcement, and require no additional insulating material. Such cellular ceramic material may also be used in the construction of buildings with a metal skeleton comprising metal bars forming a structure for supporting the cellular ceramic building material.09-22-2011
264667000 Including specified molding pressure or controlling of molding pressure (e.g., cold isostatic pressing, hydrostatic pressure, etc.) 2
20100237547Preparation of bulk superhard B-C-N nanocomposite compact - Bulk, superhard, B—C—N nanocomposite compacts were prepared by ball milling a mixture of graphite and hexagonal boron nitride, encapsulating the ball-milled mixture at a pressure in a range of from about 15 GPa to about 25 GPa, and sintering the pressurized encapsulated ball-milled mixture at a temperature in a range of from about 1800-2500 K. The product bulk, superhard, nanocomposite compacts were well sintered compacts with nanocrystalline grains of at least one high-pressure phase of B—C—N surrounded by amorphous diamond-like carbon grain boundaries. The bulk compacts had a measured Vicker's hardness in a range of from about 41 GPa to about 68 GPa.09-23-2010
20090295047METHOD FOR MANUFACTURING SINTERED COMPACT, SINTERED COMPACT MANUFACTURED BY THE METHOD AND CELL CULTURE BASE FORMED FROM THE SINTERED COMPACT - A method for manufacturing a sintered compact having high density, and a sintered compact manufactured by the manufacturing method are provided. The manufacturing method comprises the steps of preparing hydroxyapatite powder, molding a green compact, shaping the green compact, and sintering the green compact. Further, a method for manufacturing a sintered compact having high light permeability, and a sintered compact manufactured by the manufacturing method are provided. The manufacturing method comprises the steps of preparing hydroxyapatite powder, molding a green compact, shaping the green compact, primary sintering, and secondary sintering. Furthermore, a cell culture base formed from the sintered compact described above is provided, by which affinity of various cells with bone can be properly determined. Moreover, a cell culture base by which affinity of various cells with bone can be properly determined is provided. The cell culture base is mainly composed of a calcium phosphate based compound, and is highly compacted.12-03-2009
264679000 Of clay containing material 2
20100090378METHOD OF MAKING BUILDING BLOCKS FROM CLAY-CONTAINING COMPOUNDS - A method of making a building block from clay-containing compounds, which includes employing a major amount of such clay-containing material in combination with a calciferous additive and water to cure the shape the same under the influence of controlled pressure and temperature for a pre-determined time to create building block which is characterized by a mineralogical crystalline phase. The clay-containing compound includes a mixture of fine particulate material and coarser particulate material. The product produced by the method is also disclosed.04-15-2010
20110074069THE METHOD OF MANUFACTURING BUILDING BRICK - Dry compound from clay, quartz sand, starch as binding addition agent is prepared, 20% of water solution of sodium hydroxide is added to it, the obtained mixture is formed and exposed to bake for 1.5 hour under 960-1050 deg. C., at that, the ratio of quartz sand and clay is 2.33:1, and the ratio of dry compound and solution of sodium hydroxide is 6.25:1. Thus, the method is simplified, the obtained bricks have low heat transfer and low gravity, but are solid, cold, heat and chemical-resistant.03-31-2011
264671000 Particular or specific manner of positioning, arranging, or conveying of single article or preform (e.g., utilizing spacer, etc.) during sintering, vitrifying, or drying 2
20080258359Low-temperature method of producing nano-scaled graphene platelets and their nanocomposites - A method of exfoliating a layered material to produce separated nano-scaled platelets having a thickness smaller than 100 nm. The method comprises: (a) providing a graphite intercalation compound comprising a layered graphite containing expandable species residing in an interlayer space of the layered graphite; (b) exposing the graphite intercalation compound to an exfoliation temperature lower than 650° C. for a duration of time sufficient to at least partially exfoliate the layered graphite without incurring a significant level of oxidation; and (c) subjecting the at least partially exfoliated graphite to a mechanical shearing treatment to produce separated platelets. The method can further include a step of dispersing the platelets in a polymer or monomer solution or suspension as a precursor step to nanocomposite fabrication.10-23-2008
20080197544HEATING FURNACE AND METHOD FOR MANUFACTURING HONEYCOMB STRUCTURE - A heating furnace for calcining an object to be heated. The heating furnace includes a wall defining a furnace space and configured to receive the object in the furnace space, and a heating device configured to raise a temperature within the furnace space. The heating furnace also includes an oxygen supply channel configured to introduce gases containing oxygen into the furnace space. The oxygen supply channel is formed as an opening in a part of the wall surrounding the furnace space. The heating furnace further includes a gas discharge channel fluidly connected to the furnace space and configured to discharge gases in the furnace space to an outside of the furnace space, and a measurement device installed in the gas discharge channel and configured to measure properties of the gases passing through the gas discharge channel.08-21-2008
264646000 Utilizing chemically reactive atmosphere other than air, per se, during sintering to convert precursor to ceramic material 2
20100176541COMPOSITION FOR CERAMICS WITH CARBON LAYER AND MANUFACTURED METHOD OF CERAMICS USING THIS - Disclosed herein is a composition comprising 50 to 73% by weight of loess, 9 to 20% by weight of clay, 3 to 10% by weight of wood flour, 3 to 7% by weight of lignum carbonized carbon body powder, 11 to 15% by weight of water and 1 to 5% by weight of ceramic glaze to manufacture a ceramic moulding including a carbon layer therein. Preferably, the composition according to the present invention further comprises elvan powder and Schmotte. Meanwhile, the present invention also provides a method of manufacturing a ceramic moulding with a carbon layer comprising forming a moulding out of the composition and firing the formed moulding with oxidizing flames.07-15-2010
20120098168METHOD OF MANUFACTURING SINTERED SILVER ALLOY BODY AND COPPER OXIDE-CONTAINING CLAY-LIKE COMPOSITION - A method of manufacturing a sintered silver alloy body of the present invention includes steps of adding copper oxide to a silver-containing clay-like composition that contains silver-containing metal powder containing silver, a binder, and water to manufacture a clay-like composition for forming a sintered silver alloy body; making an object by making the clay-like composition for forming a sintered silver alloy body into an arbitrary shape; and baking the object in a reduction atmosphere or a non-oxidizing atmosphere after the object is dried.04-26-2012
264674000 Involving specified composition of heating atmosphere, other than air 2
20090079112Method of Sintering AlN Under a Methane-containing Nitrogen Atmosphere - The present method uses a methane-containing nitrogen gas sintering atmosphere to sinter aluminum nitride (AlN) to a high transmittance. The methane gas replaces the solid carbon charge material used in prior art sintering methods as the source of gaseous carbon. The amount of carbon in the methane-containing nitrogen gas is easily controlled by varying the partial pressure of methane in the nitrogen gas. In addition, the methane flow is stopped prior to the end of the sintering cycle to prevent darkening of the sintered part.03-26-2009
20110241267PLATE BRICK PRODUCTION METHOD AND PLATE BRICK - Disclosed is a method of producing a plate brick, which comprises: adding an organic binder to a refractory raw material mixture containing aluminum and/or an aluminum alloy; kneading them; forming the kneaded mixture into a shaped body; and burning the shaped body in a nitrogen gas atmosphere at a temperature of 1000 to 1400° C., wherein: when a temperature of a furnace atmosphere is 300° C. or more, the atmosphere is set to a nitrogen gas atmosphere; and when the temperature of the furnace atmosphere is 1000° C. or more, an oxygen gas concentration in the atmosphere is maintained at 100 volume ppm or less, and a sum of a carbon monoxide gas concentration and a carbon dioxide gas concentration is maintained at 1.0 volume % or less. This makes it possible to form a large amount of fine and uniform aluminum nitride in a plate brick to prevent microstructural degradation due to hydration caused by formation of aluminum carbide and suppress oxidation of a carbon bond so as to improve surface-roughening resistance.10-06-2011
264651000 Removal of liquid component or carrier through porous or absorbent mold surface (e.g., slip casting, etc.) 1
20080258358Slip Containing Zirconium Dioxide and Aluminum Oxide and Shaped Body Obtainable Therefrom - Slip containing at least one aluminium oxide powder and at least one unstabilized zirconium dioxide powder, wherein 10-23-2008
264650000 Casting of film (e.g., sheet, tape, etc.) 1
20100194005METHOD AND APPARATUS FOR MANUFACTURING SLABS WITH VEINED EFFECT - During the manufacture of slabs with a veined effect a liquid or powder colouring agent is deposited on the surface of a thin layer of starting mixture by means of at least one dispensing device (40) and the resultant mixture is supplied, falling freely, from one end of an extractor belt (08-05-2010
20120175825PROCESS FOR PRODUCING ALUMINUM TITANATE-BASED FIRED BODY - A process for producing an aluminum titanate-based fired body, comprising a step of firing a shaped body of a starting material mixture containing an aluminum source powder, a titanium source powder and a magnesium source powder, wherein the BET specific surface area of the magnesium source powder is not less than 2.0 m07-12-2012
20110266724METHOD FOR MANUFACTURING MICROSTRUCTURED METAL OR CERAMIC PARTS FROM FEEDSTOCK - A method of manufacturing a production part having microstructured features comprising the steps of fabricating a microstructured prototype having microstructured features, manufacturing a microstructured intermediate from the microstructured prototype so that the microstructured intermediate carries a negative of the microstructured features, attaching the microstructured intermediate to a manufacturing tool thereby providing microstructured features on a manufacturing tool, providing feedstock containing material from the group comprising of: metal, ceramic, binder, and any combination of these and manufacturing the production part from the feedstock, using the manufacturing tool and using a process from the group consisting of: compression molding, roll forming, stamping, embossing, extrusion injection molding, and any combination of these.11-03-2011
20080277841Ceramic base material - A ceramic base material that is reduced in distortion caused by high-temperature heat treatment. A ceramic base material having sintering agents and satisfying the following formula:11-13-2008
20120274007Cemented Carbide Body and Method - A method of producing a cemented carbide body provides: (1) a grain refiner compound comprising a grain refiner and carbon and/or nitrogen, and, (2) a grain growth promoter, on at least one portion of the surface of a compact of a WC-based starting material comprising one or more hard-phase components and a binder, and then sinters the compact. The invention also relates to a cemented carbide body comprising a WC-based hard phase and a binder phase, wherein at least one part of an intermediate surface zone has a lower average binder content than a part further into the body, and at least one part of an upper surface zone has in average a larger average WC grain size than the intermediate surface zone. The cemented carbide body can be used as a cutting tool insert for metal machining, an insert for a mining tool, or a coldforming tool.11-01-2012