Class / Patent application number | Description | Number of patent applications / Date published |
148238000 | Nitriding | 6 |
20110209799 | METHOD OF FORMING FINE GRAINS OF CO-CR-MO ALLOY WITH NITROGEN ADDITION AND CO-CR-MO ALLOY WITH NITROGEN ADDITION - A Co—Cr—Mo alloy with nitrogen addition composed of 26 to 35% by weight of Cr, 2 to 8% by weight of Mo, 0.1 to 0.3% by weight of N, and balance of Co is subjected to solution treatment and then subjected to isothermal aging treatment holding the alloy at 670 to 830° C. for a predetermined period of time to form a multi-phase structure composed of an ε-phase and a Cr nitride by means of an isothermal aging effect. After cooling, the alloy subjected to reverse transformation treatment in which the alloy is heated at a temperature range of 870 to 1100° C. for reverse transformation to a single γ-phase from the multi-phase structure composed of an ε-phase and a Cr nitride. | 09-01-2011 |
20120291923 | METHOD OF MANUFACTURING A LAMINAR RING - Providing a method of manufacturing a laminar ring, which permits an improvement of efficiency of a nitriding treatment of a plurality of metallic band members which constitute the laminar ring. | 11-22-2012 |
20130037174 | METHOD FOR NITRIDING SURFACE OF ALUMINUM OR ALUMINUM ALLOY BY COLD SPRAY METHOD - Provided is a method of nitriding a surface of aluminum or aluminum alloy by cold spraying. That is, a surface of aluminum or aluminum alloy is coated by cold spraying, and then a heat treatment is performed thereon at low temperature for a short time period. Accordingly, the method is suitable for nitriding a surface of Al and Al alloy, which is very difficult to be nitrided, at low production costs. The method includes removing a foreign material from a surface of a mother substrate comprising Al or Al alloy; cold spraying 15 to 50 wt % of a catalyst powder and 50 to 85 wt % of a coating agent powder on the surface of the mother substrate to form a coating layer; and heat treating the coating layer at a temperature of 450 to 630° C. in a nitrogen atmosphere for 2 to 24 hours. | 02-14-2013 |
20140048182 | SURFACE TREATMENT METHOD FOR METAL MATERIAL AND MOLD TREATED BY SURFACE TREATMENT METHOD - A surface treatment method for a metal material is provided which includes applying diluted sulfuric acid to a surface of the metal material that is composed primarily of iron, performing a heat treatment on the metal material in the presence of at least one of CO, CO | 02-20-2014 |
20140060705 | Method for gas-nitriding high-pressure components - In a method for gas-nitriding high-pressure components of a high-pressure accumulator (rail) ( | 03-06-2014 |
20140102593 | METHOD OF HEAT TREATMENT AND THE DIRECTIONS FOR USE OF FURNACE OF HEAT TREATMENT - A furnace of heat treatment capable of keeping a stable nitriding quality for a long period of time is provided. The furnace of heat treatment performs a halogenation treatment and a nitriding treatment by heating a steel material under a predetermined atmosphere. An alloy containing Ni ranging between 50 mass % or more and 80 mass % or less and Fe ranging between 0 mass % or more and 20 mass % or less is used as a material of surfaces of core internals exposed to a treatment space where the nitriding treatment is performed. Accordingly, a nitriding reaction is hardly caused on the surfaces of the core internals, and the halogenation treatment and the nitriding treatment to an article to be treated can be stably executed for a long period of time. Further, a nitrided layer can be stably formed according to purposes on any types of steel materials including a steel type hard to be nitride. | 04-17-2014 |