TH24149B - Processes and equipment for the production of steel sheets that have been rolled in the ferrite phase. - Google Patents

Abstract

DC60 Process for the production of steel sheets that have been rolled in the ferrite range. Where steel The melt is cast in a continuous casting machine to form a flat sheet by Use heat for casting And will be transported through the oven It is pre-rolled in the pre-rolling device and in the final rolling device is final rolled to a steel sheet. Ferrite with desired final thickness In which in an infinite or semi-infinite process that Completely continuous The flats are rolled into austenite cavity in the pre-ironing device. And after rolling in austenite cavity, it is cooled to the temperature at which the steel is Significantly ferrite structures and sheets are rolled into the final rolling equipment. With a speed significantly matched to the speed at which the sheet enters the device for final rolling. It is continued with a reduction in thickness and in at least one set of platens for final rolling. The plates are rolled in the ferrite range at temperatures between 850 ° C and 600 ° C and after Removed from the device for final rolling It will be cooled very quickly until there. Temperature below 500 ° C in order to avoid significant re-crystallization. The process for producing rolled steel plates in the ferride phase Where steel The melt is cast in a continuous casting machine to form a flat sheet by Use heat for casting And will be transported through the oven It is pre-rolled in the pre-rolling device and in the final rolling device is final rolled to a steel sheet. Ferrite with desired final thickness Which in the infinite or semi-infinite process that Perfectly continuous The flats are rolled into austenite cavity in the pre-ironing device. And after rolling in austenite cavity, it is cooled to the temperature at which the steel is Significantly ferrite structures and sheets are rolled into the final rolling device. With a speed significantly matched to the speed at which the plate enters the device For the final ironing It is performed with at least one set of thickness reduction steps and in the machine platform for final rolling, the steel sheet is rolled in the ferrite range at temperatures between 850 ° C and 600 ° C. And after removal from the device for final rolling It will be cooled very quickly until there. Temperature is below 500 ํ C in order to significantly avoid re-crystallization.

Claims (9)

1. The process for producing steel sheets that have been rolled in a ferride phase where molten steel is cast in a continuous casting machine to form a flat sheet. By using heat for casting And will be transported through the oven Through the device for preliminary rolling Which will be performed in preliminary rolling And through the device for final rolling for final rolling To be a ferride steel sheet to the desired thickness Where in the infinite process or Semi endless The flats are rolled during austenite in the pre-rolling equipment and after rolling during austenite then are cooled to the temperature that the steel has. Significantly ferrite structure And the steel sheet will then be rolled in the rolling device. Finally, at a speed significantly consistent with the speed at which the steel plate moves into the device to Final rolling followed by thickness reduction steps And at least in the equipment for ironing This final The sheet is rolled in a ferride phase between 850 ํ C and 600 ํ C, and after it is removed from the final rolling device it is rapidly cooled until the Temperatures below 500 ° C, in order to significantly avoid re-crystallization. 2. The process is consistent with claim 1, where on the machine platform for a neat rolling At least one layer in which the extrusion during the ferride has been performed. Lubricated rolling is performed. 3. A process corresponding to one of the preceding claims, where on all extrusion machines where the ferride extrusion is performed is performed. Ironing with a Lubrication will also be performed. 4. A process consistent with one of the preceding claims, where at least one pre-rolling unit of the rolling machine is on the bench. The lubrication is rolled. To be performed 5. Process Consistent with any of the Previous Claims. Where the steel It is IF steel 6. A process that corresponds to any of the 1 to 4 rights, where steel That would be low carbon steel 7. Process Consistent with any of the Previous Claims. Where the steel plate After it has been removed from the extrusion device, it is cooled by the device to Cooling with a cooling capacity greater than 2 MW / m2 8. Process consistent with claim 7, where cooling equipment will have Cooling capacity more than 3 MW / m2 9. Process corresponding to any of the 7th or 8th claim. Where in the device For cooling, water is applied which is sprayed onto a flat sheet. With a dense joint nozzle 1 0. Equipment to proceed with the process of one of the preceding claims, which is at least included. One set of continuous casting machines for casting thin flat panels. Homogeneous flattening ovens, which may be selected as the minimized tabs in the preliminary and calendering equipment for rolling thick flat sheets. Final as needed And coiling machine for coiling sheets Where the equipment for cooling capacity in A cooling of at least 2 MW / m2 will be placed between the machine platforms for final rolling. Of extrusion equipment and coiling machines