Povečanje mikročistoče in določitev učinka proizvodnje, z vakuumskim rafiniranjem ali brez, na kvalitativne parametre kovanega jekla z visoko vsebnostjo aluminija

The quality production technology for the WNr. 1.8504 steel was developed. The aim of the work was to achieve the required internal micro-purity and determine the effects of different production technologies on the qualitative parameters of forged-steel pieces. Firstly, polygonal ingots weighing 1600 kg were produced, using the metallurgical units, in a controlled-atmosphere induction-melting furnace (IF) without vacuum treatment, and in a vacuum and pressurized induction-melting furnace (VPIM) with vacuum treatment. The ingots were subsequently reshaped by open-die forging into bars with a rectangular cross-section. The effect of the ingot-production technology was evaluated by comparing the forged-steel pieces in terms of their purity, macrostructure and microstructure.Izvršen je bil razvoj kakovostne proizvodne tehnologije jekla W.Nr. 1.8504. Namen je bil doseči želeno notranjo mikročistočo in ugotoviti vpliv različnih tehnologij proizvodnje na kvalitativne parametre odkovkov. Najprej so bili izdelani poligonalni kovani ingoti z maso 1600 kg, z uporabo naslednjih metalurških agregatov: v indukcijski talilni peči s kontrolirano atmosfero (IF) brez vakuumskega rafiniranja in v vakuumski ter indukcijski talilni peči (VPIM) s povišanim tlakom in z vakuumskim rafiniranjem. Nato so bili ingoti s prostim kovanjem preoblikovani v palice s pravokotnim prerezom. Vpliv tehnologije proizvodnje ingotov je bil ocenjen s primerjavo odkovkov z vidika ~istosti, makro in mikrostrukture.Web of Science50342641