| 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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| 01/31/1989 | CA1249606A1 Cemented carbide body used preferably for rock drilling and mineral cutting |
| 01/24/1989 | US4799977 Alloys of group 5b metals and metals of group 4b and/or 6b; surface hardness; wear, corrosion and heat resistances |
| 01/24/1989 | US4799970 Surface treatment method for improving corrosion resistance of ferrous sintered parts |
| 01/24/1989 | US4799419 Wear resistant and friction resistant blocks |
| 01/18/1989 | EP0299625A2 Manufacture of corrosion resistant steel components |
| 01/17/1989 | US4798631 Metallic semi-finished product, processes for its preparation and its use |
| 01/12/1989 | DE3816310A1 Process for enriching titanium in the immediate surface zone of a component consisting of a nickel-based superalloy containing at least 2.0 % by weight of titanium, and use of the surface enriched according to the process |
| 12/29/1988 | WO1988010320A1 Method of low-temperature nitrocarburizing of steel articles |
| 12/27/1988 | US4793871 Heating in inert atmosphere to nitriding temperature, then nitriding or nitrocarbonizing |
| 12/14/1988 | EP0294558A1 Method for treating stainless steel surface by high temperature oxidation |
| 12/13/1988 | US4790888 Stop-off composition |
| 12/13/1988 | US4790750 Automated flexible installation for a rapid thermochemical treatment |
| 12/06/1988 | US4789560 Diffusion stop method for forming silicon oxide during the fabrication of IC devices |
| 11/23/1988 | CN88101245A Furnace used for forming a black oxidized film on the surface of a sheet metal and method for forming black oxidized film on surface of shadow mask material using furnace |
| 11/22/1988 | US4786526 Surface treating method and apparatus |
| 11/15/1988 | CA1244748A1 Non-cyanide salt bath and process for carburization of ferrous metals and alloys |
| 11/08/1988 | CA1244326A1 Accelerated carburizing method with discrete atmospheres |
| 11/03/1988 | WO1988008338A1 Preparation of superconducting ceramic materials |
| 11/02/1988 | EP0288680A2 Process for carburizing steel |
| 10/25/1988 | CA1243507A1 Nitriding grade alloy steel and article made therefrom |
| 10/19/1988 | CN88101735A Rotary hearth multi-chamber, multi-purpose furnace system |
| 10/18/1988 | US4778540 Forming carbide or diffusion layer by immersion in molten bath |
| 10/18/1988 | US4777936 Cobalt oxide with nickel, cobalt |
| 10/12/1988 | EP0285846A1 Vacuum chamber for the treatment of surfaces, especially of substrates or the like, with ionized gases |
| 10/11/1988 | US4776901 Nitrocarburizing and nitriding process for hardening ferrous surfaces |
| 10/11/1988 | US4776897 Precleaning, electrolytic polishing; forming colored oxide and removal of such |
| 10/06/1988 | WO1988007589A1 Rotary hearth multi-chamber multi-purpose furnace system |
| 10/05/1988 | EP0285593A1 Method for increasing the corrosion resistance of a quenched and self-tempered reinforcement bar made of steel |
| 10/05/1988 | EP0284804A1 Process for the oxidation of a catalyst carrier surface |
| 10/04/1988 | US4775317 Oven for the heat treatment of semiconductor substrates |
| 09/28/1988 | EP0284233A1 Furnace for formation of black oxide film on the surface of thin metal sheet and method for formation of black oxide film on the surface of shadow mask material by use of said furnace |
| 09/28/1988 | EP0148898B1 Apparatus for plasma treatment of plate-shaped substrats |
| 09/21/1988 | CN87216855U Resistance probe |
| 09/21/1988 | CN87101784A Liquid boron-aluminium co-permeation method |
| 09/06/1988 | US4769090 Rapid carburizing process in a continuous furnace |
| 09/06/1988 | US4769089 Method of annealing an aperture shadow mask for a color cathode ray tube |
| 09/06/1988 | US4768757 Using nitrogen purified by passing through titanium or titanium alloy filter media |
| 08/24/1988 | EP0279406A2 Device for forming silicon oxide film |
| 08/23/1988 | US4765840 Composition for depositing diffusion carbide coatings on iron-carbon alloy articles |
| 08/23/1988 | CA1240906A1 Oxide whisker growth on contaminated aluminum- containing stainless steel foil |
| 08/17/1988 | EP0278783A1 Process for stabilization treatment of ferromagnetic metal powders |
| 08/16/1988 | US4763880 Rotary hearth multi-chamber, multi-purpose furnace system |
| 08/16/1988 | US4763729 Oxy-salts of group iv b or v refractory metals improve protective coatings; oil wells |
| 08/16/1988 | CA1240595A1 Metal-ceramics composite article and a process for manufacturing the same |
| 08/10/1988 | EP0277143A1 Shallow case hardening and corrosion inhibition process |
| 08/10/1988 | CN87100494A Quick gas carburizing process with activating catalysis and infiltration for steel pieces |
| 08/10/1988 | CN85100188A Trace nitrogen moderate temp. gas carburization technology |
| 08/09/1988 | US4762756 Thermochemical surface treatments of materials in a reactive gas plasma |
| 07/26/1988 | US4760584 Hearth support arrangement |
| 07/26/1988 | US4759805 Aluminum conductor of low audible noise transmission |
| 07/21/1988 | EP0172165A4 Nitriding grade alloy steel and article made therefrom. |
| 07/12/1988 | US4756774 Immersing metal pieces in fluidized bed of particles, heating with ammonia, nitrogen, and natural gas, then with nitrogen and water, contacting with polymeric additives, curing |
| 07/06/1988 | CN86108780B Simultaneously sintering-boron-infiltrating process for producing iron based powder metallurgy products |
| 07/05/1988 | US4754952 Fluidized-bed type carburizing furnace means for use as bright heat-treating furnace |
| 06/30/1988 | DE3710274C1 Process for producing a composite material |
| 06/30/1988 | DE3642839A1 Process for producing a sintered metal workpiece with a hardened edge layer |
| 06/29/1988 | CN86108744A Boronizing paste and its protective coating |
| 06/28/1988 | US4753192 Movable core fast cool-down furnace |
| 06/22/1988 | EP0271688A1 Process for obtaining bainitic nodular cast iron castings |
| 06/22/1988 | CN86108481A Direct generation type controllable atmosphere carburization technology |
| 06/15/1988 | EP0271135A1 Cleaning process for metal elements of cathode ray tubes |
| 06/15/1988 | EP0270991A2 Apparatus for forming thin film |
| 06/14/1988 | US4751098 Reoxidation of partially oxidizable powders |
| 06/07/1988 | CA1237609A1 Process for applying thermal barrier coatings to metals and resulting product |
| 06/01/1988 | EP0269251A1 Method and apparatus for thermochemical treatment |
| 05/31/1988 | CA1237380A1 Process for ion nitriding aluminum or aluminum alloys |
| 05/26/1988 | DE3639403A1 Process for improving the corrosion resistance of welded workpieces of stainless steel, and correspondingly produced workpiece |
| 05/24/1988 | US4746376 Method of preventing diffusion of N2, O2 or C in selected metal surfaces |
| 05/24/1988 | US4746375 Carbiding |
| 05/24/1988 | US4746289 Heat treating process, hood for carrying out this process, and its use in heat treating furnaces |
| 05/18/1988 | CN86107815A Glue-film for boronization |
| 05/17/1988 | US4744839 Process for a rapid and homogeneous carburization of a charge in a furnace |
| 05/10/1988 | US4743515 Cemented carbide body used preferably for rock drilling and mineral cutting |
| 04/21/1988 | DE3706257C1 Process and device for producing surface layers on iron-containing components |
| 04/19/1988 | US4738730 Surface treatment of limited depth |
| 04/13/1988 | CN87202176U Apparatus for requlating liquid drops and steadying flow in heat treatment furnacce |
| 04/12/1988 | US4737200 Alternate cold working and heat treatment or thin sheets; nickel based |
| 04/06/1988 | CN87106360A Ceramic foams |
| 03/23/1988 | EP0261070A1 Ceramic foams |
| 03/23/1988 | EP0260359A1 Method of forming polycrystalline silicon layer on semiconductor wafer |
| 03/23/1988 | CN86106208A Low-temp. vulcanization in ambient temp. of metal parts |
| 03/23/1988 | CN86105997A Method of high-frequency heating paste boron-doping on metal surface and its device |
| 03/22/1988 | US4733137 For powering a gaseous discharge device |
| 03/16/1988 | EP0259825A2 Process and apparatus for edge-hardening work pieces |
| 03/16/1988 | CN87201607U Drip system of permeating agent for gas-carburization furnace |
| 03/16/1988 | CN87105410A Carbon potential regulation in low-temperature methanol catalyst cracking |
| 03/15/1988 | US4731539 Glow discharging; alloying |
| 03/09/1988 | EP0258969A2 Nitride dispersion - strengthened steels |
| 03/01/1988 | US4728863 Apparatus and method for plasma treatment of substrates |
| 02/24/1988 | CN87104600A A powder process for surface hardening of steel parts |
| 02/17/1988 | CN86105732A Nitriding of aluminium and alloy aluminium |
| 02/16/1988 | US4725491 Reinforced cement products with improved mechanical properties and creep resistance |
| 02/11/1988 | WO1987006273A3 Coating to protect against wear and fretting corrosion of, in particular, metal mechanical components held together by frictional adherence |
| 02/10/1988 | CN85100597B Boronization in solid-gas phase |
| 02/03/1988 | CN85102501B Preparation and uses of protecting film on metal parts during heat treatment |
| 02/02/1988 | CA1232171A1 Aluminum coated low-alloy steel foil |
| 01/20/1988 | CN87104782A Surface treatment and the material therefor |
| 01/19/1988 | CA1231599A1 Method for controlling lateral diffusion of silicon in a self-aligned tisi.sub.2 process |
| 01/14/1988 | DE3721207A1 Perforated plate for wire drums |
| 01/14/1988 | DE3721104A1 Nitriding plant with waste-gas treatment system |