METHOD OF CASTING HOLLOW STEEL INGOT

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to metallurgy. Proposed method comprises steel making, its processing and downhill teeing into mould with central core. Content of the main sweating elements, that, carbon, sulfur, phosphorus, oxygen and hydrogen, is corrected is arc steel furnace at steel making and in ladle at processing. Prior to teeming, hydrogen content in steel does not exceed 0.0004 wt % while oxygen activity makes 0.00005-0.0075 wt %. Content of sulfur and phosphorus in steel prior to teeming is defined subject to hollow ingot wall thickness by equality [i]=k/T, where: factor k makes (2-60)·10^-4 wt %·m for sulfur and (6-130)·10^-4 wt %·m for phosphorus, T is hollow ingot wall thickness (m). Steel teeming is made at the rate of (0.4-0.6)·M^0.45-0.75 (t/min), where: M is hollow ingot weight (t).;EFFECT: higher quality of hollow ingot.;2 cl, 1 ex