20.500.12556/DKUM-91179 Optimization of billet cooling after continuous casting using genetic programming—industrial study ŠTORE STEEL Ltd. is one of the three steel plants in Slovenia. Continuous cast 180 mm × 180 mm billets can undergo cooling to room temperature using a turnover cooling bed. They can also be cooled down under hoods or heat treated to reduce residual stresses. Additional operations of heat treatment from 36 h up to 72 h and cooling of the billets for 24 h, with limited capacities (with only two heat treatment furnaces and only six hoods), drastically influence productivity. Accordingly, the casting must be carefully planned (i.e., the main thing is casting in sequences), while the internal quality of the billets (i.e., the occurrence of inner defects) may be compromised. Also, the stock of billets can increase dramatically. As a result, it was necessary to consider the abandoning of cooling under hoods and heat treatment of billets. Based on the collected scrap data after ultrasonic examination of rolled bars, linear regression and genetic programming were used for prediction of the occurrence of inner defects. Based on modeling results, cooling under hoods and heat treatment of billets were abandoned at the casting of several steel grades. Accordingly, the casting sequences increased, and the stock of billets decreased drastically while the internal quality of the rolled bars remained the same. billet cooling continuous casting ultrasonic testing logistic regression genetic programming industrial study steel making optimization hlajenje gredic kontinuirano litje ultrazvočno testiranje logistična regresija genetsko programiranje izdelava jekla optimizacija true false true MDPI AG Angleški jezik Slovenski jezik https://www.mdpi.com/journal/metals © 2024 by the authors Članek v reviji 2024-11-25 13:14:10 2024-11-25 13:14:10 2026-01-16 03:12:15 0000-00-00 00:00:00 2024 0 0 12 str. iss. 7, [article no.] 819 Vol. 14 July 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-06-03 2024-07-14 2024-07-16 621.74:004.42 215361027 10.3390/met14070819 2075-4701 metals-14-00819-v2.pdf metals-14-00819-v2.pdf 1 0764245374A3353A1DBA9EB3146B1077 639419d99d7aa98b6b454001df4f3fe912faa89cd485add81d89e6eeff19cbff ecf58425-f1e2-11f0-9ca2-00155d580e02 https://dk.um.si/Dokument.php?lang=slv&id=202034 https://www.mdpi.com/2075-4701/14/7/819 0 3035e208-ab27-11ef-9357-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=186931 Fakulteta za strojništvo 0 0 0