| Patents for C23C 8 - Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals (10,951) |
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| 10/03/1990 | EP0390321A1 Porous sintered metal structure with a cured oxide layer |
| 09/26/1990 | EP0388710A1 Surface treatment method for titanium or titanium alloy |
| 09/26/1990 | EP0348496A4 Chemical vapor deposition of mixed oxide films |
| 09/19/1990 | EP0388333A1 Apparatus for performing sequences of continous heat treatments in vacuum |
| 09/19/1990 | EP0387536A1 Method for the boration of iron articles |
| 09/19/1990 | CN1045426A B-v co-penetrant and technology thereof |
| 09/12/1990 | EP0387237A2 Process for making objects, tools and parts by powder metallurgy |
| 09/12/1990 | EP0387113A1 Process for the deposition of a ceramic coating on a metal substrate, and article coated by this process |
| 09/12/1990 | EP0386257A1 Metal oxidation apparatus |
| 09/12/1990 | EP0146595B1 Method and apparatus for introducing normally solid materials into substrate surfaces |
| 09/05/1990 | EP0385403A1 Television picture tube inner shielding material having a blackened layer of superior adhesion and method of manufacturing the same |
| 08/29/1990 | EP0384054A1 A corrosion-resistant article |
| 08/23/1990 | DE4005710C1 Two=stage nitro:carburising for iron - comprises heating in furnace with catalyst in presence of methanol, ammonia and nitrogen |
| 08/22/1990 | EP0383471A1 Metal mesh and production thereof |
| 08/22/1990 | EP0383204A1 Metal mesh and production thereof |
| 08/21/1990 | US4950956 Plasma processing apparatus |
| 08/21/1990 | US4950334 Gas carburizing method and apparatus |
| 08/16/1990 | CA2010119A1 Deposition process of a coating of the ceramic type on a metallic substrate and element comprising a coating obtained by this procedure |
| 08/14/1990 | US4948662 Boron nitride coated ceramic fibers and coating method |
| 08/14/1990 | CA2010026A1 Metal mesh and production thereof |
| 08/14/1990 | CA2010007A1 Metal mesh and production thereof |
| 08/14/1990 | CA1272661A1 Reaction apparatus |
| 08/02/1990 | DE3926733A1 Forming scale layer on hardenable steel - esp. piercing mandrel, without rim decarburisation |
| 07/31/1990 | US4944663 Rotary compressor having oxidizing and nitriding surface treatment |
| 07/24/1990 | US4943485 Process for applying hard coatings and the like to metals and resulting product |
| 07/17/1990 | CA1271649A1 Formable, temperature-resistant martensitic steel having enhanced resistance to wear |
| 07/17/1990 | CA1271648A1 Nickel anode electrode |
| 07/03/1990 | US4938458 Continuous ion-carburizing and quenching system |
| 06/28/1990 | DE3935486A1 Gas carbonitriding ferrous components - by controlling amount of gas components to obtain required nitriding and carburising characteristic values |
| 06/28/1990 | DE3935469A1 Gas oxy:nitriding ferrous components - by controlling oxygen-potential and concn. of ammonia, nitrogen, hydrogen and water as well as dissociated ammonia |
| 06/27/1990 | EP0375491A1 Method and installation for heat treatment for case-hardening, carbonitriding or heating before the quenching of metallic work pieces |
| 06/27/1990 | EP0374557A2 Ion diffusion-induced anti-wear layer |
| 06/27/1990 | EP0172165B1 Nitriding grade alloy steel and article made therefrom |
| 06/19/1990 | US4935073 Process for applying coatings of zirconium and/or titantuim and a less noble metal to metal substrates and for converting the zirconium and/or titanium to an oxide, nitride, carbide, boride or silicide |
| 06/13/1990 | CN1042952A Process for penetrating of sulphur by low temp. evaporation process |
| 06/06/1990 | EP0371340A1 High strength gear |
| 05/31/1990 | DE3839493A1 Process for a nitriding heat treatment of metals |
| 05/30/1990 | EP0370872A1 Process for producing an atmosphere for thermal treatment by air separation by adsorption |
| 05/29/1990 | US4928477 Steel, boron, iron, nickel, wear resistance |
| 05/24/1990 | CA2003472A1 Method for controlling atmosphere in heat treatment process by way of adsorption |
| 05/23/1990 | EP0369217A2 Magnetic material, method of producing the same, and magnetic head |
| 05/23/1990 | CN1008121B Boriding paste using boric acid as boron source |
| 05/22/1990 | US4926793 Method of forming thin film and apparatus therefor |
| 05/16/1990 | EP0368035A1 Apparatus for the discontinuous desludging of salt baths |
| 05/09/1990 | EP0366784A1 Activated metal and method. |
| 05/08/1990 | US4923715 Method of forming thin film by chemical vapor deposition |
| 05/02/1990 | EP0365985A1 Steel alloys containing boron, and process for annealing the same |
| 05/01/1990 | US4921025 Carburized low silicon steel article and process |
| 04/24/1990 | US4919157 Method of cleaning metal components for cathode ray tubes |
| 04/24/1990 | US4918806 Heat treating to form nitride film on surface |
| 04/24/1990 | CA1268103A1 Surface treating method and apparatus |
| 04/22/1990 | CA2001163A1 Boron-containing steels and process for their annealing |
| 04/19/1990 | WO1990004044A1 Surface treatment of metals and alloys |
| 04/18/1990 | CN1007623B Simultaneously flowing generator for producing with coal controlled atmasphere used for heat-treatment |
| 04/11/1990 | EP0363047A1 A method of producing nitrogen strengthened alloys |
| 04/11/1990 | EP0362320A1 Process for manufacturing integrally-blackened silver alloy. |
| 04/10/1990 | US4915753 Coating of boron particles |
| 04/10/1990 | US4915751 Preheating foils to initiate precursor oxide film, increasing to high temperatures |
| 04/10/1990 | US4915361 Treatment apparatus for parts |
| 04/08/1990 | CA2000320A1 Surface treatment of metals and alloys |
| 04/04/1990 | EP0361507A1 Process for reflow coating using an atmosphere having a controlled oxidation capability |
| 04/03/1990 | US4913980 Protective coating of titanium, zirconium, tantalum or niobium oxides, in-situ oxidation, water treatment |
| 04/03/1990 | US4913749 Process for case-hardening rolling bearing elements of low-alloy nickeliferous steel |
| 03/28/1990 | EP0359756A1 Rotary hearth multi-chamber multi-purpose furnace system |
| 03/27/1990 | US4911766 Method of refining magnetic domains of electrical steels using phosphorus |
| 03/22/1990 | DE3828489A1 Process for producing corrosion-inhibiting oxide layers |
| 03/21/1990 | EP0359041A2 Oxide-coated carrier, its manufacturing process and its use |
| 03/21/1990 | EP0359002A1 Process for coating metal articles, and articles so coated |
| 03/20/1990 | US4909914 Reaction apparatus which introduces one reacting substance within a convergent-divergent nozzle |
| 03/20/1990 | US4909862 Process for ion nitriding aluminum material |
| 03/20/1990 | US4909185 Cantilever and cold zone assembly for loading and unloading an oven |
| 03/14/1990 | EP0358309A1 Accelerated whisker growth on iron-chromium-aluminium alloy foil |
| 03/13/1990 | US4908072 Cold working with oil on the surface, heating to react with nitrogen or carbon in the oil to form titanium nitride or carbide corrosion resistant layers |
| 03/08/1990 | WO1990002414A1 Device for glow potential processing, in particular ionic carburation |
| 03/08/1990 | WO1990002213A1 Device for plasma processing with an anode |
| 03/08/1990 | WO1990002212A1 Metal oxidation apparatus |
| 03/07/1990 | EP0356732A1 Internally oxidized tube |
| 02/28/1990 | EP0355360A1 Method for manufacturing tappets for reciprocating-piston engines |
| 02/27/1990 | US4904498 Method for controlling an oxide layer metallic substrates by laser |
| 02/27/1990 | US4904316 Products with improved wear resistance/iron nitride layer |
| 02/27/1990 | US4904094 Carbonitrided carbon steel |
| 02/22/1990 | WO1990001569A1 Metal oxidation apparatus and method |
| 02/14/1990 | EP0354405A2 Far-infrared emitter of high emissivity and corrosion resistance and method for the preparation thereof |
| 02/13/1990 | US4900371 Method and apparatus for thermochemical treatment |
| 02/13/1990 | CA1265729A1 Simultaneous carburizing and boronizing of earth boring drill bits |
| 02/07/1990 | EP0240526B1 Method and device for chemical treatment, particularly thermochemical treatment and chemical deposition in a large volume homogeneous plasma |
| 01/25/1990 | DE3920525A1 Method of producing an output shaft |
| 01/24/1990 | EP0352061A2 Metal material with film passivated by fluorination and apparatus composed of the metal material |
| 01/24/1990 | EP0238666B1 Surface treating method and apparatus |
| 01/24/1990 | CN1039104A Stove |
| 01/24/1990 | CN1039069A Infultrant for solid-liquid rare-earth chemico-thermal treatment and its compounding process |
| 01/24/1990 | CN1006557B Vacuum ionic carburization without external heat source |
| 01/17/1990 | CN1038845A Non-pollution cementing and cyanation in fluidized salt bath |
| 01/16/1990 | US4894090 Iron with carbides, nitrides, silicides or borides |
| 01/09/1990 | US4892759 Method for surface treatment |
| 01/03/1990 | EP0348496A1 Chemical vapor deposition of mixed oxide films. |
| 12/26/1989 | US4889601 Selective absorption film of a solar heat collector |
| 12/20/1989 | EP0347106A1 Treating aluminium workpieces |
| 12/20/1989 | EP0346931A2 Process for ion nitriding aluminum material |
| 12/19/1989 | US4888065 Method of making roller bearing element and product therefrom |