Schmidt + Clemens GmbH + Co. KG Patent applications |
Patent application number | Title | Published |
20110272070 | NICKEL-CHROMIUM-ALLOY - A nickel chromium alloy with 0.4 to 0.6% carbon, 28 to 33% chromium, 15 to 25% iron, 2 to 6% aluminum, up to 2% silicon, up to 2% manganese, up to 1.5% niobium, up to 1.5% tantalum, up to 1.0% tungsten, up to 1.0% titanium, up to 1.0% zirconium, up to 0.5% yttrium, up to 1.0% cerium, up to 0.5% molybdenum, up to 0.1% nitrogen, remainder nickel, has a high oxidation and carburization stability, long-term rupture strength and creep resistance. This alloy is particularly suited as a material for components of petrochemical plants and for parts, for example tube coils of cracker and reformer furnaces, pre-heaters, and reformer tubes, as well as for use for parts of iron ore direct reduction plants. | 11-10-2011 |
20090212024 | WELDING PROCESS - A welding process for end connection of a first tube to a second tube along a circumferential joint by means of a weld bead, in which the first and the second tube are arranged with respect to one another in the position which is necessary for formation of the circumferential joint, a heat sink for the extraction of coolant is inserted into the first and/or the second tube such that the coolant emitted from it can cool at least one of the tubes in the area of the end to be welded, the tubes and a welding burner for production of the weld bead can be moved relative to one another along the circumferential joint and are welded by the welding burner, and the coolant is used at specific intervals. | 08-27-2009 |
20090016926 | THERMOSTABLE AND CORROSION-RESISTANT CAST NICKEL-CHROMIUM ALLOY - A nickel-chromium casting alloy comprising, in weight percent, up to 0.8% of carbon, up to 1% of silicon, up to 0.2% of manganese, 15 to 40% of chromium, 0.5 to 13% of iron, 1.5 to 7% of aluminum, up to 2.5% of niobium, up to 1.5% of titanium, 0.01 to 0.4% of zirconium, up to 0.06% of nitrogen, up to 12% of cobalt, up to 5% of molybdenum, up to 6% of tungsten and from 0.01 to 0.1% of yttrium, remainder nickel, has a high resistance to carburization and oxidation even at temperatures of over 1130° C. in a carburizing and oxidizing atmosphere, as well as a high thermal stability, in particular creep rupture strength. | 01-15-2009 |