Modification of steel 35 HL surge current during crystallization
Journal Title: Вісник Житомирського державного технологічного університету. Серія: Технічні науки - Year 2017, Vol 79, Issue 1
Abstract
The method of electro steel melt modification 35 HL variable polarity current pulses with a duration of more 10-3s frequency within the 5–33 Hz, 5–24 porosity meanders, strength 30–40 A at a voltage of 180–240 V during crystallization, which allows to obtain high-quality castings 35 HL steel grade. Show that electro melt processing improves the structure and reduces the physical heterogeneity of castings and increases the rate of dissolution of metallic impurities and other components in the melt, providing fine-grained structure and increases the homogeneity of metal carbides reduces the amount of manganese reduces gases and nonmetallic inclusions. Modifying steel 35 HL pulse current during crystallization of the melt increases the physical and mechanical properties of tempered steel, increasing yield strength by 30 %, the tensile strength at 7 % elongation of 1,5 % relative narrowing by 2 %, toughness at 20 %.
Authors and Affiliations
O. M. Zhbanova, L. N. Saithareiev, H. A. Bialik, I. E. Skidin
Keywords
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