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| Number | Title | Issue Date |
| 5798002 | Method of and device for producing carbide and carbon solid solution containing surface layers In order to produce a carbon solid solution or carbide-containing surface layer on a substrate, the substrate is immersed into a cold bath of liquid active medium, and heated inside the liquid active medium by heating means immersed in the liquid active m... | 08/25/1998 |
| 5609785 | Method and apparatus for improving the performance of a heating furnace for metal slabs The invention relates to a method and apparatus for improving the performance of a heating furnace for metal slabs. The elongated heating furnace includes a water cooled conveyor track for carrying metal slabs through the heating furnace and at least one ... | 03/11/1997 |
| 5018706 | Apparatus for inhibiting stress corrosion cracking Method and apapratus for inhibiting stress corrosion cracking adjacent weldments in steel workpieces such as stainless steel pipe through generation of a controllable throughwall temperature differential by exposure of one workpiece surface to extermally ... | 05/28/1991 |
| 4604149 | Process for hardening elongate metal elements A process for hardening elongate metal elements having a circular section, according to which the said elements are made to advance through a heating station and a hardening station by a conveyer device formed by a succession of advancement and support de... | 08/05/1986 |
| 4515645 | Procedure for bright annealing of metallic work pieces using nitrogen as protective gas Metallic work pieces are annealed under protective gas in bright annealing furnaces with subsequent cooling line. Exogas or nitrogen is used as protective gas. In the latter case, liquid nitrogen is evaporated and introduced at several locations in the br... | 05/07/1985 |
| 4504042 | Apparatus for heat treating steel A process is provided for heat treating steel in which each segment of a piece of steel is quenched in a quenching zone by directing the flow of a sufficient amount of a cooling medium against a surface of each segment to lower the temperature of the segm... | 03/12/1985 |
| 4208040 | Apparatus for the gas carburizing of the bore in an object The apparatus is provided with a manifold-type means of feeding gas into the bore of the treated object and a means of discharging gas from the bore of this object which are secured as cantilevers to brackets of a frame. These means are provided with driv... | 06/17/1980 |
| 4203579 | Installation for tempering long cylindrical pieces in form and in thin layer A tempering unit for tempering shaped forms in thin layer has an interchangeable central unit provided with grippers for the workpiece before tempering made up of an assembly of bearing fingers supporting the workpiece and assembly of bearing fingers moun... | 05/20/1980 |
| 4169583 | Apparatus for reducing ore Heat is generated by combustion of coal or like carbonaceous fuel reactant dissolved in molten salt. The generated heat is transferred to steam by an alternating sequence of direct contact heat exchanges of the salt and steam with a common heat transfer m... | 10/02/1979 |
| 3969154 | Catastrophic failure of metals 1. A method of inducing rapid failure in a shape that is under stress and is composed of cold rolled steel comprising applying against a surface of said cold rolled steel shape a mixture composed of lithium metal, lithium chloride and potassium chloride, ... | 07/13/1976 |
| 3964938 | Method and apparatus for forming high tensile steel from low and medium carbon steel The specification discloses a completely automated method and apparatus for producing high tensile steel, of a controlled, predetermined U.T.S. and cross sectional area, from low and medium carbon steel by subjecting the steel to substantial elongation wh... | 06/22/1976 |
