How to prevent continuous casting slab cracks1. In order to avoid continuous casting cracks, we need to strictly control the quality of the segment repair proc
How to prevent continuous casting slab cracks
1. In order to avoid continuous casting cracks, we need to strictly control the quality of the segment repair process, and control the arc error within ±0.10mm; the roll gap error within ±0.15mm; the online outer arc error within ±0.30 Within mm, and follow the positive deviation. Establish professional equipment inspectors to strengthen supervision of online equipment and improve the accuracy of casting machine equipment.
2, secondary cooling nozzle type selection: the secondary cooling nozzle is modified to improve the atomization effect of the nozzle, and the spot inspection confirmation system for the casting machine is improved. Intensify the inspection of nozzles, deal with and replace blocked nozzles in time to ensure uniform cooling of the casting billet. Manufacture a cold test device for the second cooling nozzle, and do sampling inspection of the nozzle. If it fails to meet the requirements, repair or replace it to improve the cooling quality of the cast slab surface.
3. Improve the qualification rate of tundish temperature. By strictly controlling the steel temperature of converters and refining furnaces, and intensifying the assessment, the qualification rate of the tundish temperature has been stably controlled above 90%. Improve the production organization and coordination ability of scheduling, adhere to the "continuous casting as the center", ensure that the production rhythm is stable, and there will be no slow drawing phenomena such as continuous casting steel, etc., and the drawing speed fluctuations are included in the process discipline assessment regulations. The pulling speed fluctuation of the machine is less than or equal to 3 times.
The occurrence of continuous casting slab cracks is inseparable from the high-temperature mechanical properties of different steel grades, the functional accuracy of continuous caster equipment, and the production technology of different steel grades. Only when these three are closely integrated and considered as a whole during the production process, can we find out the real cause of cracks and take effective measures to control the occurrence of cracks.
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How to prevent continuous casting slab cracks1. In order to avoid continuous casting cracks, we need to strictly control the quality of the segment repair proc
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