Patent application number | Description | Published |
20140144550 | Method for Hot Dip Coating of a Flat Steel Product - A method for hot dip coating a flat stainless steel product with more than 5 wt. % Cr with a protective metallic coating by: heating the flat steel product under an oxygen-free heating atmosphere to 100° C.-600° C. within 1-30 seconds; continuing heating to a holding temperature of 750° C.-950° C., by heating to 550° C.-800° C. under an inert or reducing atmosphere, holding within this temperature window for 1 to 15 seconds under an oxidising atmosphere, and continuing heating under an inert or reducing atmosphere, until the holding temperature is reached; holding at the holding temperature for 10-120 seconds under a reducing atmosphere; and passing the flat steel product through a nozzle area under an inert or reducing atmosphere at 430°-780° C. and into a molten bath in which the flat steel product is coated with the metallic coating. | 05-29-2014 |
20140203482 | Apparatus and Method for the Treatment of a Flat Steel Product, Taking Place in Throughput - An apparatus and a method for the treatment of a flat steel product, taking place in throughput. The apparatus includes an indirectly heated annealing furnace chamber, a conveyor device for continuously conveying the flat steel product over a conveyor path leading from an entry to an exit of the annealing furnace chamber, and nozzle arrangements for feeding atmosphere gas, which is reactive in relation to the flat steel product, into the annealing furnace chamber. A controlled treatment of the flat steel product includes a first nozzle arrangement, from which a gas jet induces a first gas flow towards the entry of the annealing furnace chamber and sweeping over the surface of flat steel product to be treated. A second nozzle arrangement includes a gas jet which induces a second gas flow directed towards the exit of the annealing furnace chamber and sweeping over the surface of flat steel product. | 07-24-2014 |
20140251505 | Method for Producing a Flat Steel Product Provided with a Metal Protective Layer by Way of Hot Dip Coating - Optimal wetting and adhesion of the hot-dip coating by way of pre-oxidation in a DFF pre-heating furnace and humidification of the annealing atmosphere in a holding zone is achieved in a hot dip galvanised flat steel product. | 09-11-2014 |
20140322559 | High-Strength Flat Steel Product and Method for Producing Same - A flat steel product having a tensile strength of at least 1200 MPa and consists of steel containing (wt %) C: 0.10-0.50%, Si: 0.1-2.5%, Mn: 1.0-3.5%, Al: up to 2.5%, P: up to 0.020%, S: up to 0.003%, N: up to 0.02%, and optionally one or more of the elements “Cr, Mo, V, Ti, Nb, B and Ca” in the quantities: Cr: 0.1-0.5%, Mo: 0.1-0.3%, V: 0.01-0.1%, Ti: 0.001-0.15%, Nb: 0.02-0.05%, wherein Σ(V, Ti, Nb)≦0.2% for the sum of the quantities of V, Ti and Nb, B: 0.0005-0.005%, and Ca: up to 0.01% in addition to Fe and unavoidable impurities. The flat steel product has a microstructure with (in surface percent) less than 5% ferrite, less than 10% bainite, 5-70% untempered martensite, 5-30% residual austenite, and 25-80% tempered martensite, at least 99% of the iron carbide contained in the tempered martensite having a size of less than 500 nm. | 10-30-2014 |
20140342297 | Nozzle Device for a Furnace for Heat Treating a Steel Flat Product and Furnace Equipped with such a Nozzle Device - A nozzle device for a furnace, having a central supply pipe, on which at least one nozzle opening and a feed connection for connecting the nozzle device to a gas supply are provided, the gas supply feeding a gas into the nozzle device flowing through the nozzle device and issuing from the at least one nozzle opening, and also relates to a furnace for heat treating a steel flat product. The nozzle device and the furnace by simple means ensure that the respective heat treatment produces uniform results in an optimum way. This is achieved by the nozzle device having a first section, in which it has a smaller effective nozzle opening cross-section than in a second section which seen in the flow direction of the gas issuing from the respective feed connection and flowing through the nozzle device is arranged further away from the feed connection in question. | 11-20-2014 |
20150045195 | DEVICE FOR STRIP GUIDANCE IN A HOT MEDIUM (II) - The invention relates to a device for strip guidance in a hot medium, comprising a deflection roller ( | 02-12-2015 |
20150068454 | DEVICE FOR STRIP GUIDANCE IN A HOT MEDIUM (I) - The invention relates to a device for strip guidance in a hot medium, comprising a deflection roller ( | 03-12-2015 |